Minecraft:Java Edition 16w21a

16w21a is the second Minecraft:snapshot for Minecraft:Java Edition 1.10, released on May 25, 2016,<ref name="16w21a-blog">https://web.archive.org/web/20160526231610/http://www.mojang.com/2016/05/minecraft-snapshot-16w21a/</ref> which made minor changes to the behavior of blocks and items and fixed bugs.

Additions

Command format

Minecraft:NBT format

• FallFlying
  • Allows mobs to use elytra when they fall.
    • Mobs lose their ability to fly after touching the ground.

Changes

Blocks

Minecraft:Bone blocks

• No longer transparent.

Minecraft:Dispensers

• Can now equip shields onto the off hand of entities.

Minecraft:Rails (all types)

• Bounding box for ascending rails is a full block (formerly only Template:Frac of a block tall).

Minecraft:Structure blocks

• No longer emit light.
• Added "Structure Integrity and Seed" to load mode (NBT tags integrity and seed respectively).

Items

Minecraft:Chorus fruits

• Can now teleport riders from their mounts.

Minecraft:Ender pearls

• Can now teleport riders from their mounts.

Minecraft:Fishing rods

• Can now pull items to the player.

Mobs

Minecraft:Wolves

• No longer despawn.

World generation

Minecraft:End portals

• Now replace any blocks inside the portal frame ring when activating.

Minecraft:Villages

• Blacksmiths now generate with cobblestone in all biomes (rather than acacia logs in savannas and sandstone in deserts).

Command format

NBT format

• IsVillager and VillagerProfession tags are now fully removed, replaced by the ZombieType first added in Minecraft:16w20a.

General

Minecraft:Particles

• fallingdust now can be summoned, making use of the params argument like blockcrack and several other particles do.
  • Example: Template:Cmd summons a particle matching the color of lava (block ID 10).

Trivia

• 16w21a was previously removed from the Minecraft:launcher for some time, but was added back in September 2018.