Java Edition 20w51a

20w51a is the 5th snapshot for Java Edition 1.17, released on December 16, 2020. It adds axolotls, makes many changes to the sculk sensor and fixes bugs. This is the last snapshot for 2020.

Items

 * Bucket of Axolotl
 * Obtained by right-clicking on an axolotl while holding a water bucket.
 * Axolotl Spawn Egg
 * Added axolotl spawn eggs.

Mobs

 * Axolotl
 * Can be caught in a bucket like fish.
 * Can be tamed by capturing it in a bucket of water.
 * Come in different colors (yellow, brown, white, and pink, and a rare blue Axolotl).
 * Plays dead when damaged, receiving Regeneration.
 * Can grant the player temporary regeneration and removing any mining fatigue effects when the player kills a mob that the axolotl was attacking or being attacked by.
 * Attack drowned, guardians, elder guardians, squid and fish.
 * Attack fish and squid always and drowned, guardians and elder guardians only when one axolotl in a group is fed tropical fish.
 * Can be bred using tropical fish.
 * Unable to spawn in Survival, only by using their spawn egg.

Command format

 * Controls what percentage of players must sleep to skip the night.
 * When set to 0, a single player is sufficient to skip the night, and night is skipped immediately without the falling asleep transition.
 * When set over 100, the night cannot be skipped.
 * Set to 100% by default.
 * Set to 100% by default.

General

 * Tags
 * Added the item tag.
 * Contains the tropical fish item and bucket of tropical fish.
 * Items in this tag can be used to tempt axolotls.
 * Added the item tag.
 * Contains the wool item tag.
 * As thrown entities, items in this tag will not trigger vibrations.
 * Added the entity type tag.
 * Contains tropical fish, pufferfish, salmon, cod, and squid.
 * Axolotls are always hostile towards entities in this tag.
 * Added the entity type tag.
 * Contains drowned and guardians.
 * Axolotls are hostile towards entities in this tag if they have been tempted.

Blocks

 * Sculk sensor
 * "Eating Start" has been removed as an event.
 * Walking on wool no longer causes vibrations.
 * Throwing wool as an item on the ground no longer causes vibrations.
 * Sculk sensors are now silent while waterlogged.

Items

 * Bundles
 * When destroyed, it drops the items it currently has.


 * Shulker boxes
 * Like bundles, they drop their items when destroyed.

General

 * Resource packs
 * Bundle icons are now a separate texture.


 * Tags
 * Removed the game event from the  game event tag.