Java Edition 18w19a

18w19a is the thirty-third snapshot released for Java Edition 1.13, which added the Dolphin's Grace effect and changed some IDs, mainly to biomes.

Gameplay

 * Status effects
 * Added Dolphin's Grace.
 * Acquired by swimming near dolphins.
 * Makes the player swim faster.

Fluids

 * Logic
 * Separated some of the logic for blocks and fluids.
 * Current fluids:
 * The fluid at a location is currently dependent on the block at the location; currently there still are water and lava blocks.
 * Added two new fluid tags:  and.
 * This system is mostly internal; it cannot be directly interacted with yet
 * The fluid at a location is currently dependent on the block at the location; currently there still are water and lava blocks.
 * Added two new fluid tags:  and.
 * This system is mostly internal; it cannot be directly interacted with yet
 * Added two new fluid tags:  and.
 * This system is mostly internal; it cannot be directly interacted with yet

World generation

 * Buffet worlds
 * New generation type: "Caves".
 * Creates Nether-like generation.

Blocks

 * Block IDs
 * Changed names and IDs of several blocks:
 * {| class="wikitable" data-description="Changed block names and IDs"

! Old Name !! New Name ! Old ID !! New ID
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Items

 * Turtle eggs
 * Changed turtle egg inventory item texture.


 * Spawn eggs
 * Phantom spawn eggs now look more like the mob's updated texture.


 * Heart of the sea
 * Now generates in buried treasure chests (as stacks of 1).


 * Item IDs
 * Changed names of several items:
 * {| class="wikitable" data-description="Changed item names and IDs"

! Old Name !! New Name
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Mobs

 * Swimming
 * All undead mobs (except for zombie horses) now sink.
 * Husks will morph into zombies after a while if they are in water.
 * Skeleton horses are now rideable underwater.


 * Phantoms
 * Now flap their wings smoother and faster.
 * Will now drop experience.
 * Parrots
 * Will now imitate phantoms and drowned.


 * Dolphins
 * If dolphins start drowning, they will now swim to the surface.


 * Polar bears
 * Can now spawn on top of ice.


 * Pufferfish
 * Changed the name and ID of the pufferfish mob:

World generation

 * Incompatibilities
 * Due to changes in world generation, worlds from previous snapshots will no longer work.


 * Seagrass
 * Seagrass now generates in underwater caves.

Command format

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

General

 * Improvements
 * Improved the upgrade paths from old versions.


 * Credits
 * Updated the credits list.


 * Experience orbs
 * Will now float up in water.


 * Advancements
 * "How Did We Get Here?" now includes the Conduit Power status effect.


 * Sounds
 * New sounds for conduit and beacon.


 * Debug screen
 * The F3 menu now shows the biome ID, rather than name.


 * Biomes
 * Changed the names of several biomes:
 * {| class="wikitable collapsible collapsed" data-description="Changed biome names"

! Namespaced ID !! Old name !! New name
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Video
Video made by slicedlime:

Trivia

 * Unlike most of the first-of-the-week snapshots, this was released on a Tuesday instead of Wednesday.