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Minecraft:Monster Spawner: Difference between revisions

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|2-1=Spawner with fire.png
|2-1=Spawner with fire.png
|extratext = [[#Gallery|View all renders]]
|extratext = [[#Gallery|View all renders]]
|transparent='''[[Minecraft:JE]]''': Partial{{fn|Like leaves, this block diffuses sky light only from directly above.}}<br>'''[[Minecraft:BE]]''': Yes
|transparent='''JE''': Partial{{fn|Like leaves, this block diffuses sky light only from directly above.}}<br>'''BE''': Yes
|light=No
|light=No
|tool=wooden pickaxe
|tool=wooden pickaxe
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| rarity = Common
| rarity = Common
}}
}}
A '''monster spawner''' is a type of [[Minecraft:spawner]] found in a variety of [[Minecraft:structure]]s. It constantly [[Minecraft:Mob spawning|summons instances]] of the [[Minecraft:mob]] displayed within it as long as a [[Minecraft:player]] is in range and the [[Minecraft:Light|light levels]] are correct for that mob type to spawn nearby. It only drops [[Minecraft:experience orb]]s when broken, and cannot be moved from where it is found.
A '''monster spawner''' is a type of spawner found in a variety of [[Minecraft:structure]]s. It constantly summons instances of the [[Minecraft:mob]] displayed within it as long as a player is in range and the light levels are correct for that mob type to spawn nearby. It only drops experience orbs when broken, and cannot be moved from where it is found.


== Obtaining ==
== Obtaining ==
Monster spawners cannot be obtained in Survival, even with [[Minecraft:Silk Touch]].
Monster spawners cannot be obtained in Survival, even with [[Minecraft:Silk Touch]].


A monster spawner can be obtained in [[Minecraft:Creative mode]] by taking it from Creative inventory, by using the {{cmd|give}} [[Minecraft:command]], or by using {{control|pick block}}. It is initially empty and inert, but can be configured to spawn a desired mob by {{control|using}} a [[Minecraft:spawn egg]] on the placed block.
A monster spawner can be obtained in Creative mode by taking it from Creative inventory, by using the {{cmd|give}} command, or by using {{control|pick block}}. It is initially empty and inert, but can be configured to spawn a desired mob by {{control|using}} a spawn egg on the placed block.


A {{cmd|setblock}}, {{cmd|clone}} or {{cmd|Fill}} command can also be used to obtain a monster spawner.
A {{cmd|setblock}}, {{cmd|clone}} or {{cmd|Fill}} command can also be used to obtain a monster spawner.


=== Breaking ===
=== Breaking ===
If broken with a [[Minecraft:pickaxe]], a monster spawner drops 15-43 [[Minecraft:experience]]. When mined with anything else, it drops nothing.
If broken with a [[Minecraft:pickaxe]], a monster spawner drops 15-43 experience. When mined with anything else, it drops nothing.
{{breaking row|horizontal=1|Monster Spawner|pickaxe|Wood|drop=0|foot=1}}
{{breaking row|horizontal=1|Monster Spawner|pickaxe|Wood|drop=0|foot=1}}


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;{{EnvLink|Monster room|Monster rooms}}
;{{EnvLink|Monster room|Monster rooms}}
:One in the center of the monster room spawning one of the following mobs with the indicated frequency: [[Minecraft:zombie]] (50%), [[Minecraft:skeleton]] (25%), or [[Minecraft:spider]] (25%).
:One in the center of the monster room spawning one of the following mobs with the indicated frequency: [[Minecraft:zombie]] (50%), skeleton (25%), or spider (25%).
;{{EnvLink|Mineshaft|Mineshafts}}
;{{EnvLink|Mineshaft|Mineshafts}}
:Any number of [[Minecraft:cave spider]] monster spawners, densely surrounded by [[Minecraft:cobweb]]s, scattered throughout.
:Any number of cave spider monster spawners, densely surrounded by [[Minecraft:cobweb]]s, scattered throughout.
;{{EnvLink|Woodland mansion|Woodland mansions}}
;{{EnvLink|Woodland mansion|Woodland mansions}}
:Optionally one [[Minecraft:spider]] monster spawner, densely surrounded by [[Minecraft:cobweb]]s, in a rarely generated secret room on the 2nd or 3rd floor. It is sometimes visible through the windows from outside.
:Optionally one spider monster spawner, densely surrounded by [[Minecraft:cobweb]]s, in a rarely generated secret room on the 2nd or 3rd floor. It is sometimes visible through the windows from outside.
;{{EnvLink|Stronghold|Strongholds}}
;{{EnvLink|Stronghold|Strongholds}}
:One [[Minecraft:silverfish]] monster spawner in the [[Minecraft:end portal]] room.
:One silverfish monster spawner in the [[Minecraft:end portal]] room.
;{{EnvLink|Nether fortress|Nether fortresses}}
;{{EnvLink|Nether fortress|Nether fortresses}}
:One or two [[Minecraft:blaze]] monster spawners on fenced platforms with full-block "stairs" leading up to them. Normally two are generated per fortress, but there can be fewer.
:One or two blaze monster spawners on fenced platforms with full-block "stairs" leading up to them. Normally two are generated per fortress, but there can be fewer.
;{{EnvLink|Bastion remnant|Bastion remnants}}
;{{EnvLink|Bastion remnant|Bastion remnants}}
:One [[Minecraft:magma cube]] monster spawner hanging from an [[Minecraft:iron chain]] underneath a bridge in treasure rooms.
:One magma cube monster spawner hanging from an iron chain underneath a bridge in treasure rooms.


== Usage ==
== Usage ==
A monster spawner spawns mobs in an (at most) 9×3×9 volume (see {{slink||Mechanics}}) around it when the player is within 16 blocks. Suitable spawning locations for the block's mob type are provided in or around the spawning volume. The monster spawner attempts to spawn four [[Minecraft:mob]]s around it, then waits from 10 to 39.95 seconds before attempting to spawn more.
A monster spawner spawns mobs in an (at most) 9×3×9 volume (see {{slink||Mechanics}}) around it when the player is within 16 blocks. Suitable spawning locations for the block's mob type are provided in or around the spawning volume. The monster spawner attempts to spawn four [[Minecraft:mob]]s around it, then waits from 10 to 39.95 seconds before attempting to spawn more.


In [[Minecraft:Peaceful]] difficulty, monster spawners still activate but do not spawn [[Minecraft:monster]]s, including [[Minecraft:zombie horse]]s and [[Minecraft:camel husk]]s {{in|java}}.
In Peaceful difficulty, monster spawners still activate but do not spawn [[Minecraft:monster]]s, including zombie horses and camel husks {{in|java}}.


Monster spawners are [[Minecraft:transparent]], but they behave like [[Minecraft:leaves]] in that they diffuse sky light coming from directly above.
Monster spawners are transparent, but they behave like [[Minecraft:leaves]] in that they diffuse sky light coming from directly above.


=== Mechanics ===
=== Mechanics ===


A monster spawner activates when a [[Minecraft:player]] (that's not in [[Minecraft:Spectator]] mode) comes within a spherical radius of 16 blocks from the center point of the block; i.e. 15.5 blocks from the monster spawner itself. The player's presence is determined by coordinates at their foot level, meaning that a player standing exactly 15.5 blocks below the spawner doesn't activate it, even though their head is in range. {{IN|java}} an active monster spawner attempts to spawn mobs within a 4-block horizontal and 1-block vertical range; that is, in a 9×3×9 volume centered on the monster spawner. {{IN|bedrock}}, the horizontal spawning range is 4 blocks [[Minecraft:taxicab distance]], creating spawning volume extending 4 blocks in each cardinal horizontal direction from the sides of the monster spawner; its horizontal cross-section is therefore diamond-shaped. Mobs can spawn anywhere in this range that is suitable, with mobs more likely to spawn closer to the monster spawner than farther away.
A monster spawner activates when a player (that's not in Spectator mode) comes within a spherical radius of 16 blocks from the center point of the block; i.e. 15.5 blocks from the monster spawner itself. The player's presence is determined by coordinates at their foot level, meaning that a player standing exactly 15.5 blocks below the spawner doesn't activate it, even though their head is in range. {{IN|java}} an active monster spawner attempts to spawn mobs within a 4-block horizontal and 1-block vertical range; that is, in a 9×3×9 volume centered on the monster spawner. {{IN|bedrock}}, the horizontal spawning range is 4 blocks taxicab distance, creating spawning volume extending 4 blocks in each cardinal horizontal direction from the sides of the monster spawner; its horizontal cross-section is therefore diamond-shaped. Mobs can spawn anywhere in this range that is suitable, with mobs more likely to spawn closer to the monster spawner than farther away.


While mobs are spawned at fractional x and z-coordinates (i.e. not aligned to blocks), they are spawned at an integer y-coordinate. Horizontally, a mob can spawn with its ''center point'' anywhere within range, but vertically, mobs spawn with their legs at either the same layer as the monster spawner block, one block above it, or one block below it.  (Note that when there are other blocks slightly intersecting the mob's hitbox, they can sometimes glitch further away - often up - but this does not make it a true spawning point.)
While mobs are spawned at fractional x and z-coordinates (i.e. not aligned to blocks), they are spawned at an integer y-coordinate. Horizontally, a mob can spawn with its ''center point'' anywhere within range, but vertically, mobs spawn with their legs at either the same layer as the monster spawner block, one block above it, or one block below it.  (Note that when there are other blocks slightly intersecting the mob's hitbox, they can sometimes glitch further away - often up - but this does not make it a true spawning point.)
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A monster spawner attempts to spawn 4 mobs at randomly chosen points within the spawning volume, then waits anywhere from 200 to 799 ticks (10 to 39.95 seconds) before spawning again. As it waits, the mob model inside the block spins faster and faster. Except for the normal solid-block spawning requirement, all the remaining ones must be met (not in a solid block, correct light level, etc.), so the monster spawner often produces fewer than 4 mobs. When it does spawn, more flame particles temporarily appear around it, and puffs of smoke are emitted from the spawned mobs {{in|JE}} or the northwest corner of the spawner {{in|BE}}. If the monster spawner fails to spawn any mobs because it did not pick any suitable locations, it repeats this process every [[Minecraft:tick]] until it succeeds. It starts the next wait cycle only after successfully spawning at least one mob.
A monster spawner attempts to spawn 4 mobs at randomly chosen points within the spawning volume, then waits anywhere from 200 to 799 ticks (10 to 39.95 seconds) before spawning again. As it waits, the mob model inside the block spins faster and faster. Except for the normal solid-block spawning requirement, all the remaining ones must be met (not in a solid block, correct light level, etc.), so the monster spawner often produces fewer than 4 mobs. When it does spawn, more flame particles temporarily appear around it, and puffs of smoke are emitted from the spawned mobs {{in|JE}} or the northwest corner of the spawner {{in|BE}}. If the monster spawner fails to spawn any mobs because it did not pick any suitable locations, it repeats this process every [[Minecraft:tick]] until it succeeds. It starts the next wait cycle only after successfully spawning at least one mob.


If 6 or more mobs of a monster spawner's type have their [[Minecraft:hitbox]] intersecting a 9×9×9 volume centered on the monster spawner block {{in|java}} or a 16×10×16 volume centered on the lower northwest corner of the monster spawner block {{in|bedrock}}, the monster spawner "poofs" without creating any mobs and then waits for the next cycle.{{needs testing|bedrock=1|Does &quot;the mob's hitbox intersects&quot; apply to Bedrock too, or is that Java-specific? (Checking before each attempt is obviously done as the cap of 6 is always reached, and the last round of spawning may poof.)}} This is checked before each of the four spawn attempts.
If 6 or more mobs of a monster spawner's type have their hitbox intersecting a 9×9×9 volume centered on the monster spawner block {{in|java}} or a 16×10×16 volume centered on the lower northwest corner of the monster spawner block {{in|bedrock}}, the monster spawner "poofs" without creating any mobs and then waits for the next cycle.{{needs testing|bedrock=1|Does &quot;the mob's hitbox intersects&quot; apply to Bedrock too, or is that Java-specific? (Checking before each attempt is obviously done as the cap of 6 is always reached, and the last round of spawning may poof.)}} This is checked before each of the four spawn attempts.


==== Spawning requirements ====
==== Spawning requirements ====
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For a monster spawner that generates mobs that spawn only in dark conditions (light level = 0), a [[Minecraft:torch]] placed on any side or top of the monster spawner is sufficient to disable it for the whole 9×3×9 volume.
For a monster spawner that generates mobs that spawn only in dark conditions (light level = 0), a [[Minecraft:torch]] placed on any side or top of the monster spawner is sufficient to disable it for the whole 9×3×9 volume.


For a [[Minecraft:blaze]] or [[Minecraft:silverfish]] spawner, a light level of 12 is required to prevent spawning. This can be achieved by:
For a blaze or silverfish spawner, a light level of 12 is required to prevent spawning. This can be achieved by:
* Laying 9 blocks in the pattern shown on the right using blocks having a luminance value of 15
* Laying 9 blocks in the pattern shown on the right using blocks having a luminance value of 15
* Laying a dense 7×7 grid of torches on the monster spawner's Y level
* Laying a dense 7×7 grid of torches on the monster spawner's Y level
* {{IN|bedrock}}, placing a light source of level 15 on four surfaces
* {{IN|bedrock}}, placing a light source of level 15 on four surfaces


A monster spawner is also disabled by filling the spawning volume with [[Minecraft:solid block]]s. This is often used to disable [[Minecraft:magma cube]] monster spawners, as magma cubes can spawn in any light level. However, since all magma cubes require the space of a large magma cube in order to spawn, a clever placement of as little as 9 solid blocks a layer above the monster spawner (see right image) can completely disable it.
A monster spawner is also disabled by filling the spawning volume with [[Minecraft:solid block]]s. This is often used to disable magma cube monster spawners, as magma cubes can spawn in any light level. However, since all magma cubes require the space of a large magma cube in order to spawn, a clever placement of as little as 9 solid blocks a layer above the monster spawner (see right image) can completely disable it.


=== Custom monster spawners ===
=== Custom monster spawners ===
[[File:Example monster spawner - Spider.png|thumb|right|A monster spawner in a monster room that produces spiders.]]
[[File:Example monster spawner - Spider.png|thumb|right|A monster spawner in a monster room that produces spiders.]]


{{IN|java}}, using [[Minecraft:command]]s, monster spawners can be customized:
{{IN|java}}, using commands, monster spawners can be customized:
* They can be made to spawn any kind of entity.
* They can be made to spawn any kind of entity.
* A single monster spawner can spawn multiple different entities, chosen at random from a list.
* A single monster spawner can spawn multiple different entities, chosen at random from a list.
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=== Note blocks ===
=== Note blocks ===
A monster spawner can be placed under a [[Minecraft:note block]] to produce "bass drum" sounds.
A monster spawner can be placed under a note block to produce "bass drum" sounds.


=== Piston interactivity ===
=== Piston interactivity ===


Monster spawners cannot be pushed by [[Minecraft:piston]]s. They also cannot be pushed nor pulled by [[Minecraft:sticky piston]]s.
Monster spawners cannot be pushed by [[Minecraft:piston]]s. They also cannot be pushed nor pulled by sticky pistons.


== Sounds ==
== Sounds ==
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** {{nbt|short|RequiredPlayerRange}}: Overrides the block radius of the sphere of activation by players for this spawner. For every gametick, a spawner checks all players in the current world to test whether a player is within this sphere. Requires the {{cd|MaxNearbyEntities}} property to also be set.
** {{nbt|short|RequiredPlayerRange}}: Overrides the block radius of the sphere of activation by players for this spawner. For every gametick, a spawner checks all players in the current world to test whether a player is within this sphere. Requires the {{cd|MaxNearbyEntities}} property to also be set.
** {{nbt|short|SpawnCount}}: How many mobs to attempt to spawn each time. Requires the {{cd|MinSpawnDelay}} property to also be set.
** {{nbt|short|SpawnCount}}: How many mobs to attempt to spawn each time. Requires the {{cd|MinSpawnDelay}} property to also be set.
** {{nbt|compound|SpawnData}}: Contains tags to copy to the ''next'' spawned entity(s) ''after'' spawning. ''Any'' of the [[Minecraft:entity format|entity]] or [[Minecraft:entity format|mob]] tags may be used. If a spawner specifies any of these tags, almost all variable data such as mob equipment, villager profession, sheep wool color, etc., are not automatically generated, and must also be manually specified (that this does not apply to position data, which are randomized as normal unless Pos is specified. Similarly, unless Size and Health are specified for a Slime or Magma Cube, these are still randomized). This also determines the appearance of the miniature entity spinning in the spawner cage. '''Warning:''' If {{cd|SpawnPotentials}} exists, this tag gets overwritten after the next spawning attempt: see above for more details.
** {{nbt|compound|SpawnData}}: Contains tags to copy to the ''next'' spawned entity(s) ''after'' spawning. ''Any'' of the entity or mob tags may be used. If a spawner specifies any of these tags, almost all variable data such as mob equipment, villager profession, sheep wool color, etc., are not automatically generated, and must also be manually specified (that this does not apply to position data, which are randomized as normal unless Pos is specified. Similarly, unless Size and Health are specified for a Slime or Magma Cube, these are still randomized). This also determines the appearance of the miniature entity spinning in the spawner cage. '''Warning:''' If {{cd|SpawnPotentials}} exists, this tag gets overwritten after the next spawning attempt: see above for more details.
** {{nbt|list|SpawnPotentials}}: Optional. List of possible entities to spawn. If this tag does not exist, but {{cd|SpawnData}} exists, Minecraft generates it the next time the spawner tries to spawn an entity. The generated list contains a single entry derived from the {{cd|SpawnData}} tag.
** {{nbt|list|SpawnPotentials}}: Optional. List of possible entities to spawn. If this tag does not exist, but {{cd|SpawnData}} exists, Minecraft generates it the next time the spawner tries to spawn an entity. The generated list contains a single entry derived from the {{cd|SpawnData}} tag.
*** {{nbt|compound}}: A potential future spawn. ''After'' the spawner makes an attempt at spawning, it chooses one of these entries at random and uses it to prepare for the next spawn, overwriting {{cd|SpawnData}}.
*** {{nbt|compound}}: A potential future spawn. ''After'' the spawner makes an attempt at spawning, it chooses one of these entries at random and uses it to prepare for the next spawn, overwriting {{cd|SpawnData}}.
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== Videos ==
== Videos ==
{{Video note|This video is outdated, as monster spawners have been added to the Creative inventory in [[Minecraft:Java Edition 1.19.3]].}}
{{Video note|This video is outdated, as monster spawners have been added to the Creative inventory in Java Edition 1.19.3.}}
<div style="text-align:center">{{yt|XlvdHQpKZGQ}}</div>
<div style="text-align:center">{{yt|XlvdHQpKZGQ}}</div>


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|{{HistoryLine|java alpha}}
|{{HistoryLine|java alpha}}
|{{HistoryLine||v1.0.1|Monster spawners can't be picked up anymore.}}
|{{HistoryLine||v1.0.1|Monster spawners can't be picked up anymore.}}
|{{HistoryLine||v1.1.0|Removed rotating [[Minecraft:model]] inside of the monster spawner due to some [[Minecraft:multiplayer]] issues with it.}}
|{{HistoryLine||v1.1.0|Removed rotating model inside of the monster spawner due to some [[Minecraft:multiplayer]] issues with it.}}
|{{HistoryLine|java beta}}
|{{HistoryLine|java beta}}
|{{HistoryLine||1.2|Monster spawners again show a rotating [[Minecraft:model]] inside of what they spawn in [[Minecraft:singleplayer]] after being missing for several versions.}}
|{{HistoryLine||1.2|Monster spawners again show a rotating model inside of what they spawn in singleplayer after being missing for several versions.}}
|{{HistoryLine||1.8|dev=Pre-release|Added cave spider monster spawners to [[Minecraft:mineshaft]]s.}}
|{{HistoryLine||1.8|dev=Pre-release|Added cave spider monster spawners to mineshafts.}}
|{{HistoryLine|java}}
|{{HistoryLine|java}}
|{{HistoryLine||1.0.0|dev=Beta 1.9 Prerelease|[[File:Spawner JE2.png|32px]] The texture of monster spawners has been changed to a darker color.
|{{HistoryLine||1.0.0|dev=Beta 1.9 Prerelease|[[File:Spawner JE2.png|32px]] The texture of monster spawners has been changed to a darker color.
|Added blaze spawners to [[Minecraft:Nether fortress]]es.}}
|Added blaze spawners to Nether fortresses.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 3|Added natural silverfish monster spawners.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 3|Added natural silverfish monster spawners.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 4|Monster spawners now [[Minecraft:drop]] when mined using a [[Minecraft:tool]] enchanted with the new [[Minecraft:Silk Touch]] enchantment.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 4|Monster spawners now drop when mined using a [[Minecraft:tool]] enchanted with the new [[Minecraft:Silk Touch]] enchantment.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 5|[[Minecraft:Squid]] monster spawners now work only in a narrow elevation range, from 46 to 62.
|{{HistoryLine|||dev=Beta 1.9 Prerelease 5|Squid monster spawners now work only in a narrow elevation range, from 46 to 62.
|Monster spawners no longer drop when broken using a tool enchanted with Silk Touch.}}
|Monster spawners no longer drop when broken using a tool enchanted with Silk Touch.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 6|Monster spawners now take much less time to destroy; the breaking time is [[Minecraft:tier]] dependent.}}
|{{HistoryLine|||dev=Beta 1.9 Prerelease 6|Monster spawners now take much less time to destroy; the breaking time is tier dependent.}}
|{{HistoryLine||1.2.1|dev=12w06a|Monster spawners now show the [[Minecraft:mob]] they are spawning in [[Minecraft:multiplayer]]; previously they would always show a [[Minecraft:pig]].}}
|{{HistoryLine||1.2.1|dev=12w06a|Monster spawners now show the [[Minecraft:mob]] they are spawning in [[Minecraft:multiplayer]]; previously they would always show a [[Minecraft:pig]].}}
|{{HistoryLine||1.3.1|dev=12w18a|As a result of singleplayer being changed to an internal server, mobs spawned by monster spawners are no longer accompanied by puffs of smoke.}}
|{{HistoryLine||1.3.1|dev=12w18a|As a result of singleplayer being changed to an internal server, mobs spawned by monster spawners are no longer accompanied by puffs of smoke.}}
|{{HistoryLine|||dev=12w21a|[[Minecraft:Pick block]] no longer works on monster spawners.}}
|{{HistoryLine|||dev=12w21a|Pick block no longer works on monster spawners.}}
|{{HistoryLine|||dev=12w22a|Monster spawners now drop [[Minecraft:experience]] when destroyed.}}
|{{HistoryLine|||dev=12w22a|Monster spawners now drop experience when destroyed.}}
|{{HistoryLine|||dev=12w26a|Monster spawners now support extra data pertaining to what they spawn.}}
|{{HistoryLine|||dev=12w26a|Monster spawners now support extra data pertaining to what they spawn.}}
|{{HistoryLine||1.8|dev=14w26c|The horizontal spawning range of monster spawners is now calculated from the center of the [[Minecraft:block]] rather than the northwest corner.
|{{HistoryLine||1.8|dev=14w26c|The horizontal spawning range of monster spawners is now calculated from the center of the [[Minecraft:block]] rather than the northwest corner.
|The exclusion zone of monster spawners has been reduced: for a default monster spawner, the 6 [[Minecraft:mob]]s must be in a 9×9×9 region rather than 17×9×17 to prevent spawning.}}
|The exclusion zone of monster spawners has been reduced: for a default monster spawner, the 6 [[Minecraft:mob]]s must be in a 9×9×9 region rather than 17×9×17 to prevent spawning.}}
|{{HistoryLine|||dev=14w28b|The type of mob spawned from a monster spawner can now be changed by {{control|using}} a [[Minecraft:spawn egg]] on it.}}
|{{HistoryLine|||dev=14w28b|The type of mob spawned from a monster spawner can now be changed by {{control|using}} a spawn egg on it.}}
|{{HistoryLine||1.9|dev=16w02a|A monster spawner containing a large [[Minecraft:mob]] now scales down the mob to fit inside the monster spawner block.}}
|{{HistoryLine||1.9|dev=16w02a|A monster spawner containing a large [[Minecraft:mob]] now scales down the mob to fit inside the monster spawner block.}}
|{{HistoryLine||1.11|dev=16w39a|[[Minecraft:Spider]] monster spawners now generate in [[Minecraft:woodland mansion]]s.}}
|{{HistoryLine||1.11|dev=16w39a|Spider monster spawners now generate in woodland mansions.}}
|{{HistoryLine||1.13|dev=17w47a|"Monster Spawner" has been renamed to simply "Spawner".}}
|{{HistoryLine||1.13|dev=17w47a|"Monster Spawner" has been renamed to simply "Spawner".}}
|{{HistoryLine||1.14|dev=18w43a|[[File:Spawner JE3.png|32px]] The texture of spawners has been changed.}}
|{{HistoryLine||1.14|dev=18w43a|[[File:Spawner JE3.png|32px]] The texture of spawners has been changed.}}
|{{HistoryLine|||dev=19w14a|Mobs spawned by monster spawners are once again accompanied by puffs of smoke.}}
|{{HistoryLine|||dev=19w14a|Mobs spawned by monster spawners are once again accompanied by puffs of smoke.}}
|{{HistoryLine||1.16|dev=20w16a|[[Minecraft:Magma cube]] spawners now generate in [[Minecraft:bastion remnant]]s.}}
|{{HistoryLine||1.16|dev=20w16a|Magma cube spawners now generate in bastion remnants.}}
|{{HistoryLine||1.17|dev=21w20a|The [[Minecraft:rarity]] of spawners has been changed from "Common" to "Epic".}}
|{{HistoryLine||1.17|dev=21w20a|The rarity of spawners has been changed from "Common" to "Epic".}}
|{{HistoryLine||1.18|dev=experimental snapshot 2|[[Minecraft:Zombie]], [[Minecraft:skeleton]], [[Minecraft:spider]], and [[Minecraft:cave spider]] spawners now require a light level of 12 to prevent spawning.}}
|{{HistoryLine||1.18|dev=experimental snapshot 2|[[Minecraft:Zombie]], skeleton, spider, and cave spider spawners now require a light level of 12 to prevent spawning.}}
|{{HistoryLine|||dev=21w37a|The light level changes in experimental snapshot 2 have been reverted.}}
|{{HistoryLine|||dev=21w37a|The light level changes in experimental snapshot 2 have been reverted.}}
|{{HistoryLine||1.19.3|dev=22w43a|The spawner is now available in the [[Minecraft:Creative inventory]].<ref>{{bug|MC-132820|||Fixed}}</ref>}}
|{{HistoryLine||1.19.3|dev=22w43a|The spawner is now available in the [[Minecraft:Creative inventory]].<ref>{{bug|MC-132820|||Fixed}}</ref>}}
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|The monster spawner now has the "Common" rarity again, as prior to 21w20a.
|The monster spawner now has the "Common" rarity again, as prior to 21w20a.
|Monster spawners no longer have a pig in them and flame particles by default.
|Monster spawners no longer have a pig in them and flame particles by default.
|[[Minecraft:Pick block]] once again works on monster spawners.<ref>{{bug|MC-50605|||Fixed}}</ref>}}
|Pick block once again works on monster spawners.<ref>{{bug|MC-50605|||Fixed}}</ref>}}
|{{HistoryLine||1.20.3|dev=23w45a|[[File:Spawner JE4.png|32px]] Monster spawners now render the inner faces.}}
|{{HistoryLine||1.20.3|dev=23w45a|[[File:Spawner JE4.png|32px]] Monster spawners now render the inner faces.}}
|{{HistoryLine||1.20.5|dev=24w13a|Custom monster spawners can now specify a loot table to use as equipment of spawned mobs.}}
|{{HistoryLine||1.20.5|dev=24w13a|Custom monster spawners can now specify a loot table to use as equipment of spawned mobs.}}
Line 283: Line 283:
|{{HistoryLine||v0.9.0|dev=build 1|[[File:Spawner BE1.png|32px]] Added monster spawners.}}
|{{HistoryLine||v0.9.0|dev=build 1|[[File:Spawner BE1.png|32px]] Added monster spawners.}}
|{{HistoryLine|||dev=build 2|Added monster spawners to the [[Minecraft:Creative inventory]].
|{{HistoryLine|||dev=build 2|Added monster spawners to the [[Minecraft:Creative inventory]].
|The type of [[Minecraft:mob]] spawned can now be changed using a [[Minecraft:spawn egg]].}}
|The type of [[Minecraft:mob]] spawned can now be changed using a spawn egg.}}
|{{HistoryLine|||dev=build 9|Monster spawners now emit a [[Minecraft:light]] level of 3.}}
|{{HistoryLine|||dev=build 9|Monster spawners now emit a light level of 3.}}
|{{HistoryLine||v0.12.1|dev=build 1|[[Minecraft:Blaze]] monster spawners now generate in [[Minecraft:nether fortress]]es.
|{{HistoryLine||v0.12.1|dev=build 1|Blaze monster spawners now generate in nether fortresses.
|Monster spawners now drop [[Minecraft:experience]] when mined using a [[Minecraft:pickaxe]].}}
|Monster spawners now drop experience when mined using a [[Minecraft:pickaxe]].}}
|{{HistoryLine|pocket}}
|{{HistoryLine|pocket}}
|{{HistoryLine||1.1.0|dev=alpha 1.1.0.0|[[Minecraft:Spider]] monster spawners now generate in [[Minecraft:woodland mansion]]s.}}
|{{HistoryLine||1.1.0|dev=alpha 1.1.0.0|Spider monster spawners now generate in woodland mansions.}}
|{{HistoryLine|bedrock}}
|{{HistoryLine|bedrock}}
|{{HistoryLine||1.10.0|dev=beta 1.10.0.3|[[File:Spawner BE2.png|32px]] The texture of monster spawners has been changed.}}
|{{HistoryLine||1.10.0|dev=beta 1.10.0.3|[[File:Spawner BE2.png|32px]] The texture of monster spawners has been changed.}}
|{{HistoryLine||1.16.0|dev=beta 1.16.0.59|[[Minecraft:Magma cube]] monster spawners now generate in [[Minecraft:bastion remnant]]s.}}
|{{HistoryLine||1.16.0|dev=beta 1.16.0.59|Magma cube monster spawners now generate in bastion remnants.}}
|{{HistoryLine||1.17.30|dev=beta 1.17.30.21|Monster spawners no longer emit light.}}
|{{HistoryLine||1.17.30|dev=beta 1.17.30.21|Monster spawners no longer emit light.}}
|{{HistoryLine||1.21.20|dev=Preview 1.21.10.23|Monster spawners now have new [[Minecraft:sound]]s.}}
|{{HistoryLine||1.21.20|dev=Preview 1.21.10.23|Monster spawners now have new sounds.}}
}}
}}


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|{{HistoryLine||xbox=TU1|xbone=CU1|ps3=1.00|psvita=1.00|ps4=1.00|wiiu=Patch 1|switch=1.0.1|[[File:Spawner JE1.png|32px]] Added monster spawners.}}
|{{HistoryLine||xbox=TU1|xbone=CU1|ps3=1.00|psvita=1.00|ps4=1.00|wiiu=Patch 1|switch=1.0.1|[[File:Spawner JE1.png|32px]] Added monster spawners.}}
|{{HistoryLine||xbox=TU3|[[File:Spawner JE2.png|32px]] The texture of monster spawners has been changed.}}
|{{HistoryLine||xbox=TU3|[[File:Spawner JE2.png|32px]] The texture of monster spawners has been changed.}}
|{{HistoryLine||xbox=TU31|xbone=CU19|ps3=1.22|psvita=1.22|ps4=1.22|wiiu=Patch 3|The type of [[Minecraft:mob]] spawned from a monster spawner can now be changed by using a [[Minecraft:spawn egg]].}}
|{{HistoryLine||xbox=TU31|xbone=CU19|ps3=1.22|psvita=1.22|ps4=1.22|wiiu=Patch 3|The type of [[Minecraft:mob]] spawned from a monster spawner can now be changed by using a spawn egg.}}
|{{HistoryLine||xbox=TU48|xbone=CU38|ps3=1.41|psvita=1.41|ps4=1.41|wiiu=Patch 17|Added a particle effect and sound effect when a monster spawner fails to spawn due to [[Minecraft:spawn limit]]s.}}
|{{HistoryLine||xbox=TU48|xbone=CU38|ps3=1.41|psvita=1.41|ps4=1.41|wiiu=Patch 17|Added a particle effect and sound effect when a monster spawner fails to spawn due to spawn limits.}}
|{{HistoryLine||xbox=TU54|xbone=CU44|ps3=1.52|psvita=1.52|ps4=1.52|wiiu=Patch 24|switch=1.0.4|[[Minecraft:Pig]] spawners now generate in [[Minecraft:woodland mansion]]s.}}
|{{HistoryLine||xbox=TU54|xbone=CU44|ps3=1.52|psvita=1.52|ps4=1.52|wiiu=Patch 24|switch=1.0.4|[[Minecraft:Pig]] spawners now generate in woodland mansions.}}
|{{HistoryLine||xbox=TU56|xbone=CU48|ps3=1.55|psvita=1.55|ps4=1.55|wiiu=Patch 26|switch=1.0.6|[[Minecraft:Spider]] spawners now generate in [[Minecraft:woodland mansion]]s instead of pig spawners.}}
|{{HistoryLine||xbox=TU56|xbone=CU48|ps3=1.55|psvita=1.55|ps4=1.55|wiiu=Patch 26|switch=1.0.6|Spider spawners now generate in woodland mansions instead of pig spawners.}}
|{{HistoryLine||xbox=TU69|xbone=none|ps3=1.76|psvita=1.76|ps4=1.76|wiiu=Patch 38|switch=none|Monster spawners are now available in the [[Minecraft:Creative inventory]], and can be obtained with [[Minecraft:pick block]].}}
|{{HistoryLine||xbox=TU69|xbone=none|ps3=1.76|psvita=1.76|ps4=1.76|wiiu=Patch 38|switch=none|Monster spawners are now available in the [[Minecraft:Creative inventory]], and can be obtained with pick block.}}
|{{HistoryLine||xbox=none|ps3=none|psvita=none|ps4=1.90|wiiu=none|[[File:Spawner JE3.png|32px]] The texture of monster spawners has been changed.}}
|{{HistoryLine||xbox=none|ps3=none|psvita=none|ps4=1.90|wiiu=none|[[File:Spawner JE3.png|32px]] The texture of monster spawners has been changed.}}
}}
}}
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{{HistoryTable
{{HistoryTable
|{{HistoryLine|java}}
|{{HistoryLine|java}}
|{{HistoryLine||1.8|dev=14w18a|Monster spawners with [[Minecraft:Java Edition data values/Pre-flattening/Block IDs/Before 14w25a|numerical metadata variants]] 1 through 15, which are inaccessible through normal gameplay, now have [[Minecraft:Missing model|no model]] [[File:Missing Model JE2.png|32px]] rather than appearing identical to monster spawners.}}
|{{HistoryLine||1.8|dev=14w18a|Monster spawners with numerical metadata variants 1 through 15, which are inaccessible through normal gameplay, now have no model [[File:Missing Model JE2.png|32px]] rather than appearing identical to monster spawners.}}
|{{HistoryLine|||dev=14w26a|Block metadata has been completely removed from this snapshot onward with the introduction of [[Minecraft:block states]]. As this block never used block metadata at all prior to this version, fifteen unused, inaccessible metadata variants of it have been completely removed from the game:
|{{HistoryLine|||dev=14w26a|Block metadata has been completely removed from this snapshot onward with the introduction of block states. As this block never used block metadata at all prior to this version, fifteen unused, inaccessible metadata variants of it have been completely removed from the game:
{{dvt|spritetype=block|sprite=monster spawner|[[Minecraft:Monster Spawner]]}}
{{dvt|spritetype=block|sprite=monster spawner|[[Minecraft:Monster Spawner]]}}
{{dvt|sprite=missingno|dv=1-15|[[Minecraft:Java Edition removed blocks/Metadata variants#Boring variants|Inaccessible "boring" variants of monster spawners]]|foot=1}}}}
{{dvt|sprite=missingno|dv=1-15|Inaccessible "boring" variants of monster spawners|foot=1}}}}
|{{HistoryLine||1.11|dev=16w32a|The [[Minecraft:block entity]] ID has been changed from <code>MobSpawner</code> to <code>mob_spawner</code>.}}
|{{HistoryLine||1.11|dev=16w32a|The [[Minecraft:block entity]] ID has been changed from <code>MobSpawner</code> to <code>mob_spawner</code>.}}
|{{HistoryLine||1.13|dev=17w47a|Prior to [[Minecraft:Java Edition 1.13/Flattening|''The Flattening'']], this block's numeral ID was 52.}}
|{{HistoryLine||1.13|dev=17w47a|Prior to ''The Flattening'', this block's numeral ID was 52.}}
|{{HistoryLine|||dev=pre5|The ID of spawners has been changed to <code>spawner</code>.}}
|{{HistoryLine|||dev=pre5|The ID of spawners has been changed to <code>spawner</code>.}}
}}
}}
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== Trivia ==
== Trivia ==
* Monster spawners containing [[Minecraft:zombie]]s can never spawn a [[Minecraft:zombie villager]].<ref>{{bug|MC-106146||Zombie spawner doesn't spawn zombie villagers|WAI}}</ref>
* Monster spawners containing [[Minecraft:zombie]]s can never spawn a zombie villager.<ref>{{bug|MC-106146||Zombie spawner doesn't spawn zombie villagers|WAI}}</ref>
* {{IN|java}}, monster spawners containing [[Minecraft:zombie]]s have a small chance to spawn a [[Minecraft:chicken jockey]].
* {{IN|java}}, monster spawners containing [[Minecraft:zombie]]s have a small chance to spawn a chicken jockey.
* Monster spawners containing [[Minecraft:zombie]]s or [[Minecraft:skeleton]]s have a chance for the mob spinning inside to have armor.
* Monster spawners containing [[Minecraft:zombie]]s or skeletons have a chance for the mob spinning inside to have armor.
* Monster spawners containing [[Minecraft:spider]]s have a small chance to spawn a [[Minecraft:spider jockey]].
* Monster spawners containing spiders have a small chance to spawn a spider jockey.
* {{IN|java}}, monster spawners containing [[Minecraft:pillager]]s have a small chance for the mob spinning inside to be a [[Minecraft:raid captain]].
* {{IN|java}}, monster spawners containing pillagers have a small chance for the mob spinning inside to be a raid captain.
* {{IN|bedrock}}, the [[Minecraft:iron golem]] inside an iron golem spawner is apparently on very low health, visible by the cracks.
* {{IN|bedrock}}, the iron golem inside an iron golem spawner is apparently on very low health, visible by the cracks.
* Monster spawners in [[Minecraft:mushroom fields]], the [[Minecraft:deep dark]] or [[Minecraft:the Void biome]] can function normally, despite those biomes having no hostile mobs spawn naturally.
* Monster spawners in mushroom fields, the deep dark or the Void biome can function normally, despite those biomes having no hostile mobs spawn naturally.
* It is possible for an empty monster spawner to generate naturally. If a newer world is loaded in an older version of ''Minecraft'', the monster spawner can lose its block entity data, causing it to enter its default state, which is an empty monster spawner. Alternatively, if a [[Minecraft:buried treasure]] chest generates next to a monster spawner, it duplicates the monster spawner without duplicating the NBT tag, resulting in a natural empty monster spawner.<ref>{{bug|MC-234396||Buried treasure can create invalid block entities when generating in the location same as a block entity}}</ref> The chest also gets invalid block (monster spawner) data, making it unopenable.
* It is possible for an empty monster spawner to generate naturally. If a newer world is loaded in an older version of ''Minecraft'', the monster spawner can lose its block entity data, causing it to enter its default state, which is an empty monster spawner. Alternatively, if a buried treasure chest generates next to a monster spawner, it duplicates the monster spawner without duplicating the NBT tag, resulting in a natural empty monster spawner.<ref>{{bug|MC-234396||Buried treasure can create invalid block entities when generating in the location same as a block entity}}</ref> The chest also gets invalid block (monster spawner) data, making it unopenable.
* A monster spawner does not preserve its NBT data when placed in Survival mode.<ref>{{bug|MC-105216||BlockEntityTag not used in survival|WAI}}</ref> It requires the player to be in Creative mode and have permission level greater than or equal to 2.
* A monster spawner does not preserve its NBT data when placed in Survival mode.<ref>{{bug|MC-105216||BlockEntityTag not used in survival|WAI}}</ref> It requires the player to be in Creative mode and have permission level greater than or equal to 2.


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==== Structure ====
==== Structure ====
<gallery>
<gallery>
Nether Fortress Blaze Spawner.png|A [[Minecraft:blaze]] monster spawner in a [[Minecraft:nether fortress]].
Nether Fortress Blaze Spawner.png|A blaze monster spawner in a nether fortress.
Woodland mansion 1x1 as2.png|Spider monster spawner in a [[Minecraft:woodland mansion]].
Woodland mansion 1x1 as2.png|Spider monster spawner in a woodland mansion.
</gallery>
</gallery>
=== Screenshots ===
=== Screenshots ===
<gallery>
<gallery>
Two Spawners.png|A [[Minecraft:monster room]], connected to another monster room, with two monster spawners.
Two Spawners.png|A monster room, connected to another monster room, with two monster spawners.
Zombie in armor spawner.png|A monster spawner edited to spawn [[Minecraft:zombie]]s wearing enchanted diamond [[Minecraft:armor]].
Zombie in armor spawner.png|A monster spawner edited to spawn [[Minecraft:zombie]]s wearing enchanted diamond [[Minecraft:armor]].
Blazespawner.png|Light required to disable a blaze monster spawner.
Blazespawner.png|Light required to disable a blaze monster spawner.
Natural skeleton spawner.png|A monster spawner that spawns [[Minecraft:skeleton]]s.
Natural skeleton spawner.png|A monster spawner that spawns skeletons.
Surface spider spawner.png|A [[Minecraft:spider]] monster spawner that generated on the surface. The monster spawner is located roughly in the middle of the picture, underneath a [[Minecraft:cobweb]].
Surface spider spawner.png|A spider monster spawner that generated on the surface. The monster spawner is located roughly in the middle of the picture, underneath a [[Minecraft:cobweb]].
Spawner pen.png|[[Minecraft:Chicken]]s spawning from multiple monster spawners.
Spawner pen.png|Chickens spawning from multiple monster spawners.
SpawnerInactive.png|A monster spawner in an older version of ''Minecraft''.
SpawnerInactive.png|A monster spawner in an older version of ''Minecraft''.
Cave-spider-spawner.png|Cave spider monster spawner seen from a chamber.
Cave-spider-spawner.png|Cave spider monster spawner seen from a chamber.
Magma Cube Spawner in Bastion Remnant.png|A [[Minecraft:magma cube]] monster spawner inside the [[Minecraft:bastion remnant]].
Magma Cube Spawner in Bastion Remnant.png|A magma cube monster spawner inside the bastion remnant.
Spawnerinmineshaft.png|A spider monster spawner connected to a [[Minecraft:mineshaft]].
Spawnerinmineshaft.png|A spider monster spawner connected to a mineshaft.
Blazes and Wither Skeleton near a Spawner.png|Two [[Minecraft:blaze]]s spawned near a blaze monster spawner and a [[Minecraft:wither skeleton]].
Blazes and Wither Skeleton near a Spawner.png|Two blazes spawned near a blaze monster spawner and a wither skeleton.
5 pig spawner glitch.png|Pig monster spawners generating when a buried treasure chest spawns inside a monster spawner (Fixed in 1.17 pre-1).
5 pig spawner glitch.png|Pig monster spawners generating when a buried treasure chest spawns inside a monster spawner (Fixed in 1.17 pre-1).
2 spawners, geode and mineshaft.png|Amethyst geode with mineshaft and 2 cave spider monster spawners. Check the image for more details, including seed and coordinates.
2 spawners, geode and mineshaft.png|Amethyst geode with mineshaft and 2 cave spider monster spawners. Check the image for more details, including seed and coordinates.
Line 383: Line 383:
== See also ==
== See also ==
* {{EntityLink|Minecart with Monster Spawner}}
* {{EntityLink|Minecart with Monster Spawner}}
* {{BlockSprite|Monster Spawner}} [[Minecraft:Tutorial:Monster spawner traps|Monster spawner traps]]
* {{BlockSprite|Monster Spawner}} Monster spawner traps
* {{BlockLink|Trial Spawner}}
* {{BlockLink|Trial Spawner}}


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[[Category:Hazardous blocks]]
[[Category:Hazardous blocks]]


[[Minecraft:cs:Líheň oblud]]
cs:Líheň oblud
[[Minecraft:de:Spawner]]
de:Spawner
[[Minecraft:es:Generador de criaturas]]
es:Generador de criaturas
[[Minecraft:fr:Générateur de créatures]]
fr:Générateur de créatures
[[Minecraft:hu:Szörnyidéző]]
hu:Szörnyidéző
[[Minecraft:it:Generatore di mostri]]
it:Generatore di mostri
[[Minecraft:ja:モンスタースポナー]]
ja:モンスタースポナー
[[Minecraft:ko:몬스터 생성기]]
ko:몬스터 생성기
[[Minecraft:lzh:孳衍籠]]
lzh:孳衍籠
[[Minecraft:nl:Monsterkooi]]
nl:Monsterkooi
[[Minecraft:pl:Przyzywacz potworów]]
pl:Przyzywacz potworów
[[Minecraft:pt:Gerador de Criaturas]]
pt:Gerador de Criaturas
[[Minecraft:ru:Спаунер мобов]]
ru:Спаунер мобов
[[Minecraft:uk:Породжувач монстрів]]
uk:Породжувач монстрів
[[Minecraft:zh:刷怪笼]]
zh:刷怪笼

Revision as of 15:56, 9 April 2026

For the {{{Description}}} of the same name, see [[{{{Destination}}}]].

Template:Infobox block A monster spawner is a type of spawner found in a variety of Minecraft:structures. It constantly summons instances of the Minecraft:mob displayed within it as long as a player is in range and the light levels are correct for that mob type to spawn nearby. It only drops experience orbs when broken, and cannot be moved from where it is found.

Obtaining

Monster spawners cannot be obtained in Survival, even with Minecraft:Silk Touch.

A monster spawner can be obtained in Creative mode by taking it from Creative inventory, by using the Template:Cmd command, or by using Template:Control. It is initially empty and inert, but can be configured to spawn a desired mob by Template:Control a spawn egg on the placed block.

A Template:Cmd, Template:Cmd or Template:Cmd command can also be used to obtain a monster spawner.

Breaking

If broken with a Minecraft:pickaxe, a monster spawner drops 15-43 experience. When mined with anything else, it drops nothing. Template:Breaking row

Natural generation

Monster spawners can generate naturally in the following places:

Template:EnvLink
One in the center of the monster room spawning one of the following mobs with the indicated frequency: Minecraft:zombie (50%), skeleton (25%), or spider (25%).
Template:EnvLink
Any number of cave spider monster spawners, densely surrounded by Minecraft:cobwebs, scattered throughout.
Template:EnvLink
Optionally one spider monster spawner, densely surrounded by Minecraft:cobwebs, in a rarely generated secret room on the 2nd or 3rd floor. It is sometimes visible through the windows from outside.
Template:EnvLink
One silverfish monster spawner in the Minecraft:end portal room.
Template:EnvLink
One or two blaze monster spawners on fenced platforms with full-block "stairs" leading up to them. Normally two are generated per fortress, but there can be fewer.
Template:EnvLink
One magma cube monster spawner hanging from an iron chain underneath a bridge in treasure rooms.

Usage

A monster spawner spawns mobs in an (at most) 9×3×9 volume (see Template:Slink) around it when the player is within 16 blocks. Suitable spawning locations for the block's mob type are provided in or around the spawning volume. The monster spawner attempts to spawn four Minecraft:mobs around it, then waits from 10 to 39.95 seconds before attempting to spawn more.

In Peaceful difficulty, monster spawners still activate but do not spawn Minecraft:monsters, including zombie horses and camel husks Template:In.

Monster spawners are transparent, but they behave like Minecraft:leaves in that they diffuse sky light coming from directly above.

Mechanics

A monster spawner activates when a player (that's not in Spectator mode) comes within a spherical radius of 16 blocks from the center point of the block; i.e. 15.5 blocks from the monster spawner itself. The player's presence is determined by coordinates at their foot level, meaning that a player standing exactly 15.5 blocks below the spawner doesn't activate it, even though their head is in range. Template:IN an active monster spawner attempts to spawn mobs within a 4-block horizontal and 1-block vertical range; that is, in a 9×3×9 volume centered on the monster spawner. Template:IN, the horizontal spawning range is 4 blocks taxicab distance, creating spawning volume extending 4 blocks in each cardinal horizontal direction from the sides of the monster spawner; its horizontal cross-section is therefore diamond-shaped. Mobs can spawn anywhere in this range that is suitable, with mobs more likely to spawn closer to the monster spawner than farther away.

While mobs are spawned at fractional x and z-coordinates (i.e. not aligned to blocks), they are spawned at an integer y-coordinate. Horizontally, a mob can spawn with its center point anywhere within range, but vertically, mobs spawn with their legs at either the same layer as the monster spawner block, one block above it, or one block below it. (Note that when there are other blocks slightly intersecting the mob's hitbox, they can sometimes glitch further away - often up - but this does not make it a true spawning point.)

A monster spawner attempts to spawn 4 mobs at randomly chosen points within the spawning volume, then waits anywhere from 200 to 799 ticks (10 to 39.95 seconds) before spawning again. As it waits, the mob model inside the block spins faster and faster. Except for the normal solid-block spawning requirement, all the remaining ones must be met (not in a solid block, correct light level, etc.), so the monster spawner often produces fewer than 4 mobs. When it does spawn, more flame particles temporarily appear around it, and puffs of smoke are emitted from the spawned mobs Template:In or the northwest corner of the spawner Template:In. If the monster spawner fails to spawn any mobs because it did not pick any suitable locations, it repeats this process every Minecraft:tick until it succeeds. It starts the next wait cycle only after successfully spawning at least one mob.

If 6 or more mobs of a monster spawner's type have their hitbox intersecting a 9×9×9 volume centered on the monster spawner block Template:In or a 16×10×16 volume centered on the lower northwest corner of the monster spawner block Template:In, the monster spawner "poofs" without creating any mobs and then waits for the next cycle.Template:Needs testing This is checked before each of the four spawn attempts.

Spawning requirements

A monster spawner performs a relaxed version of the ordinary spawning check: the general solid block requirement is removed, but the volume (hitbox of the mob) is kept along with some other checks according to mob specifics. As a result, for some types of mobs to spawn in the outer planes of the spawning volume, some planes outside the volume may also need to be free of solid blocks to conform with the mobs' height, width, or other rules governing their individual spawn volumes. Examples:

  • For mobs that are two or more blocks tall such as zombies, skeletons, or blazes to spawn in the top y-layer, the layer above must contain only a transparent block such as Minecraft:air, Minecraft:glass, Minecraft:leaves, etc.
  • Template:IN, a turtle monster spawner can spawn turtles only on Minecraft:sand blocks less than 4 blocks above sea level (typically at Y=62). Template:IN no biome/light/height conditions apply for turtles in monster spawners.
  • Template:IN, some animals require light level ≥7, e.g. chicken, sheep, cow, rabbit. Others ignore the light level condition given in the spawning rules json files, e.g. parrot, turtle. This suggests that some of the early animals have hard-coded requirements when used in monster spawners.
Summary of maximum spawn volumes for common monster spawners
Mob type Required Volume (Java) Required Volume (Bedrock)Template:Verify Vertical
alignment
Template:EntityLink<ref group="note">Pig monster spawners do not appear naturally in vanilla Minecraft.</ref> 8.9×2.9×8.9 Template:BlockGrid
Template:EntityLink 8.7×2.5×8.7 Template:BlockGrid
Template:EntityLink 8.4×2.3×8.4 Template:BlockGrid
Template:EntityLink 8.6×3.95×8.6 8.6×3.9×8.6 Template:BlockGrid
Template:EntityLink 8.6×3.99×8.6 8.6×3.9×8.6 Template:BlockGrid
Template:EntityLink 8.6×3.8×8.6 8.5×3.8×8.5 Template:BlockGrid
Template:EntityLink 9.4×2.9×9.4 Template:BlockGrid
Template:EntityLink 10.04×4.04×10.04 10.08×4.08×10.08 Template:BlockGrid

Template:Notelist

For all of the volumes listed in the table, the horizontal plane is centered on the center of the monster spawner. While the spawning volume for pigs is 8.9×2.9×8.9, the requirement of grass blocks that are necessary for pigs to spawn reduces the actual volume in which they successfully spawn to 8.9×1.0×8.9. Other mobs can spawn in mid-Minecraft:air, ignoring general rules about spawning on solid ground.

The spawn conditions do not include biomes for most mobs. As such, monster spawners can place mobs where they normally wouldn't generate. For example, a mooshroom monster spawner can operate in a plains biome as long as there are mycelium blocks within the spawn area because the mooshroom's spawning code checks only for mycelium. The reason mooshrooms are not actually spawned elsewhere is that the game does not normally try to spawn them in other biomes: only the mushroom field biome has mooshroom on the list of things to spawn.

Disabling

File:BlazeDisableGrid.png
Disabling a blaze monster spawner with nine blocks. Glowstone can be replaced with other light sources of light level 15.
File:Disabled blaze spawner.png
Blaze monster spawner disabled by four jack o'Lanterns. This works only Template:In in small rooms.
File:MagmaSpawnerGrid.png
With the clever placement of nine solid blocks, a magma cube monster spawner can be completely disabled. Only the cobblestone is needed, glass is just for distance marking.

Template:See also The way a monster spawner can be disabled depends on the entity it tries to spawn.

For a monster spawner that generates mobs that spawn only in dark conditions (light level = 0), a Minecraft:torch placed on any side or top of the monster spawner is sufficient to disable it for the whole 9×3×9 volume.

For a blaze or silverfish spawner, a light level of 12 is required to prevent spawning. This can be achieved by:

  • Laying 9 blocks in the pattern shown on the right using blocks having a luminance value of 15
  • Laying a dense 7×7 grid of torches on the monster spawner's Y level
  • Template:IN, placing a light source of level 15 on four surfaces

A monster spawner is also disabled by filling the spawning volume with Minecraft:solid blocks. This is often used to disable magma cube monster spawners, as magma cubes can spawn in any light level. However, since all magma cubes require the space of a large magma cube in order to spawn, a clever placement of as little as 9 solid blocks a layer above the monster spawner (see right image) can completely disable it.

Custom monster spawners

File:Example monster spawner - Spider.png
A monster spawner in a monster room that produces spiders.

Template:IN, using commands, monster spawners can be customized:

  • They can be made to spawn any kind of entity.
  • A single monster spawner can spawn multiple different entities, chosen at random from a list.
  • Properties can be set on the spawned entities.
  • Various range and timing properties of the monster spawner can be changed.

Detailed technical information about custom monster spawners can be found below.

Template:IN, monster spawner customization cannot be done in the base game (i.e. without addons/behavior packs).

Note blocks

A monster spawner can be placed under a note block to produce "bass drum" sounds.

Piston interactivity

Monster spawners cannot be pushed by Minecraft:pistons. They also cannot be pushed nor pulled by sticky pistons.

Sounds

Template:El: Template:Sound table/Block/Monster spawner/JE Template:El: Template:Sound table/Block/Monster spawner/BE

Data values

ID

Template:Edition: Template:ID table Template:ID table

Template:Edition: Template:ID table Template:ID table

Block data

A monster spawner has a block entity associated with it that holds additional data about the block.

Template:El: Template:See also

<section begin="block data"/>

  • Template:Nbt Block entity data
    • Template:Nbt inherit/blockentity
    • <section begin="spawner data"/>Template:Nbt: Ticks until next spawn. If 0, it spawns immediately when a player enters its range. If set to -1 (this state never occurs in a natural spawner; it seems to be a feature accessed only via NBT editing), the spawner resets this and Template:Cd as though it had just completed a successful spawn cycle, immediately when a player enters its range. Setting this to -1 can be useful if the player wants the game to properly randomize the spawner's Template:Cd and Template:Cd, rather than starting with pre-defined values.
    • Template:Nbt: Overrides the maximum number of nearby (within a box of Template:Cd*2+1 × Template:Cd*2+1 × 8 centered around the spawner block) entities whose IDs match this spawner's entity ID. This is relative to a mob's hitbox, not its physical position. Also, all entities within all chunk sections (16×16×16 cubes) overlapped by this box are tested for their ID and hitbox overlap, rather than just entities within the box, meaning that a large amount of entities outside the box (or within it, of course) can cause substantial lag.
    • Template:Nbt: The maximum random delay for the next spawn delay. Requires the Template:Cd and Template:Cd properties to also be set.
    • Template:Nbt: The minimum random delay for the next spawn delay. May be equal to Template:Cd. Requires the Template:Cd property to also be set, otherwise it defaults to 0.
    • Template:Nbt: Overrides the block radius of the sphere of activation by players for this spawner. For every gametick, a spawner checks all players in the current world to test whether a player is within this sphere. Requires the Template:Cd property to also be set.
    • Template:Nbt: How many mobs to attempt to spawn each time. Requires the Template:Cd property to also be set.
    • Template:Nbt: Contains tags to copy to the next spawned entity(s) after spawning. Any of the entity or mob tags may be used. If a spawner specifies any of these tags, almost all variable data such as mob equipment, villager profession, sheep wool color, etc., are not automatically generated, and must also be manually specified (that this does not apply to position data, which are randomized as normal unless Pos is specified. Similarly, unless Size and Health are specified for a Slime or Magma Cube, these are still randomized). This also determines the appearance of the miniature entity spinning in the spawner cage. Warning: If Template:Cd exists, this tag gets overwritten after the next spawning attempt: see above for more details.
    • Template:Nbt: Optional. List of possible entities to spawn. If this tag does not exist, but Template:Cd exists, Minecraft generates it the next time the spawner tries to spawn an entity. The generated list contains a single entry derived from the Template:Cd tag.
    • Template:Nbt: The radius around which the spawner attempts to place mobs randomly. The spawn area is square, includes the block the spawner is in, and is centered around the spawner's x,z coordinates - not the spawner itself. It is 2 blocks high, centered around the spawner's y coordinate (its bottom), allowing mobs to spawn as high as its top surface and as low as 1 block below its bottom surface. Vertical spawn coordinates are integers, while horizontal coordinates are floating point and weighted toward values near the spawner itself. Default value is 4.<section end="spawner data"/>

<section end="block data"/>

Template:El:

See Minecraft:Bedrock Edition level format/Block entity format.

Videos

Template:Video note

History

Template:Info needed section Template:More sounds

Java Edition

Template:HistoryTable

Bedrock Edition

Template:HistoryTable

Legacy Console Edition

Template:HistoryTable

New Nintendo 3DS Edition

Template:HistoryTable

Data history

Template:HistoryTable

Issues

Template:Issue list

Trivia

  • Monster spawners containing Minecraft:zombies can never spawn a zombie villager.<ref>Template:Bug</ref>
  • Template:IN, monster spawners containing Minecraft:zombies have a small chance to spawn a chicken jockey.
  • Monster spawners containing Minecraft:zombies or skeletons have a chance for the mob spinning inside to have armor.
  • Monster spawners containing spiders have a small chance to spawn a spider jockey.
  • Template:IN, monster spawners containing pillagers have a small chance for the mob spinning inside to be a raid captain.
  • Template:IN, the iron golem inside an iron golem spawner is apparently on very low health, visible by the cracks.
  • Monster spawners in mushroom fields, the deep dark or the Void biome can function normally, despite those biomes having no hostile mobs spawn naturally.
  • It is possible for an empty monster spawner to generate naturally. If a newer world is loaded in an older version of Minecraft, the monster spawner can lose its block entity data, causing it to enter its default state, which is an empty monster spawner. Alternatively, if a buried treasure chest generates next to a monster spawner, it duplicates the monster spawner without duplicating the NBT tag, resulting in a natural empty monster spawner.<ref>Template:Bug</ref> The chest also gets invalid block (monster spawner) data, making it unopenable.
  • A monster spawner does not preserve its NBT data when placed in Survival mode.<ref>Template:Bug</ref> It requires the player to be in Creative mode and have permission level greater than or equal to 2.

Gallery

Renders

Spawner

Structure

Screenshots

See also

Notes

Template:Fnlist

References

Template:Reflist

External links

Navigation

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cs:Líheň oblud de:Spawner es:Generador de criaturas fr:Générateur de créatures hu:Szörnyidéző it:Generatore di mostri ja:モンスタースポナー ko:몬스터 생성기 lzh:孳衍籠 nl:Monsterkooi pl:Przyzywacz potworów pt:Gerador de Criaturas ru:Спаунер мобов uk:Породжувач монстрів zh:刷怪笼

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