Java Edition 18w19a

18w19a is the thirty-third snapshot released for 1.13.

Additions

 * General


 * New Buffet generation type: "Caves".
 * Creates Nether generation.


 * Gameplay


 * New effect: "Dolphin's Grace".
 * Acquired by swimming near dolphins.
 * Makes the player swim faster.


 * Tag
 * New tag type:.
 * 2 tags use this type  and
 * Currently not used.
 * They also contain invalid blocks  and

Changes

 * General
 * Improved the upgrade paths from old versions.
 * Updated the credits list.
 * Experience orbs will now float up in water.
 * The "How Did We Get Here?" advancement now includes the Conduit Power status effect.
 * The F3 menu now shows the biome ID, rather than name.
 * Changed the names of several biomes:


 * Items
 * Changed turtle egg inventory item texture.
 * Phantom spawn eggs now look more like the mob's updated texture.
 * Heart of the sea now generate in buried treasure chests (as stacks of 1).
 * Changed names of several items:


 * Blocks
 * Changed names and IDs of several blocks:


 * Sounds
 * New sounds for conduit and beacon.


 * Commands
 * The output of the command can now be copied.


 * Mobs
 * All undead mobs except for zombie horses now sink.
 * It is unsure if the Wither boss can sink because it cannot be seen sinking due to the fact that it will instantly start "flying" or go up once summoned
 * Skeleton horses are now rideable underwater.
 * Phantoms now flap their wings smoother and faster.
 * However, in some games, phantoms do not flap their wings at all regardless of the game being updated to 18w19a
 * Phantoms will now drop experience.
 * Parrots will now imitate phantoms and drowneds.
 * If dolphins start drowning, they will now swim to the surface.
 * Changed the name and ID of pufferfish (mob):


 * World generation
 * Due to changes in world generation, worlds from previous snapshots will no longer work.
 * Seagrass now generates in underwater caves.

Video
Video made by slicedlime: