Java Edition 18w07a

18w07a is the eighteenth snapshot released for 1.13.

Blocks

 * Added stripped logs, a smoother log variant.
 * Created by right clicking with an axe on a log.
 * Act as regular logs, and can still be used to craft planks.
 * Added bubble columns.
 * Created by magma blocks or soul sand in water at least 2 blocks deep.
 * Magma blocks columns push entities down: they will stop items from floating up in water and sink boats.
 * Soul sand columns push entities up.
 * Added kelp and sea grass blocks.
 * Can only be placed underwater, requiring at least one water block above it.
 * Can be placed on dry land by using the command.
 * Generate in oceans.
 * Can grow multiple blocks high.
 * Have animated textures.
 * Sea grass also comes in a tall variant.
 * Sea grass can be generated when right clicking any block underwater.
 * Kelp can be smelted into dry kelp.
 * Added dried kelp blocks.
 * Smelts 20 items when used as fuel in a furnace.
 * Added prismarine stairs and slabs.
 * Added turtle eggs
 * Stepping on turtle eggs will break them.
 * Zombies and zombie pigmen will intentionally step on turtle eggs.

Items

 * Added new trident weapon.
 * Can be thrown by it, or be used as a melee weapon by, dealing  damage.
 * Are currently unobtainable in Survival Mode
 * Added kelp and dried kelp.
 * Kelp can be used to place a kelp plant underwater.
 * Kelp can be dried in a furnace to create dried kelp.
 * Dried kelp can be eaten, restoring hunger point.
 * Added turtle shell pieces.
 * Dropped when baby turtles grow up.
 * Can be used to craft turtle shells.
 * Added turtle shells.
 * Can be used as a helmet, adding 2 armor points.
 * While equipped and out of water, it will give the player the Water Breathing effect for 10 seconds, essentially giving the player 10 extra seconds of breath underwater.
 * Can be used to brew the potion of the Turtle Master from an awkward potion.
 * Added potion of the Turtle Master.
 * Will give Slowness IV and Resistance IV for 1 minute.
 * Brewing it with redstone dust will extend the effect time to 3 minutes.
 * Brewing it with glowstone dust will increase the effect amplifiers from IV to VI.
 * Brewing it with gunpowder or dragon's breath will create a splash or lingering potion, respectively.
 * Added arrow of the Turtle Master.
 * Added turtle spawn eggs
 * Added phantom spawn eggs

Mobs

 * Added phantoms.
 * Spawn in the Overworld and the End, sometimes in groups of up to four.
 * Attack players who haven't slept in a while.
 * Drops 1-4 leathers.
 * This may change.
 * Added turtles.
 * Spawns on warm beaches (in plains, jungles, swamps, deserts, mesas and savannahs), in groups of 1-5. This is temporary.
 * Will lay eggs in their home beach.
 * Drops 0-2 sea grass upon death.
 * Drops 0-1 bowl when killed with a trident enchanted with Channeling.
 * Can be bred using cod. (later changed to sea grass)
 * You can craft pieces of their old shell into one big shell.
 * Added tridents.

Gameplay

 * Enchantments
 * Added Loyalty.
 * Goes up to level III.
 * Used on tridents to make it return when thrown.
 * Added Impaling.
 * Goes up to level V.
 * Used on tridents to deal more damage to sea creatures.
 * Added Riptide.
 * Goes up to level III.
 * Used on tridents to launch the player when thrown while in water or rain.
 * Added Channeling.
 * Only has one level.
 * Used on tridents to summon a lightning bolt on impact with a mob during storms.
 * Requires the target mob to be directly under an open sky and in a biome where it is raining.


 * Movement
 * When sprinting while swimming, the player will now go much faster than normal swimming, and rapidly dive down to the lowest point in the body of water.
 * The players hitbox is only as large as 0.6×0.6 blocks (same as while flying with an elytra) while doing this
 * Vertically, the player can fit through a one block gap like this
 * If the ceiling block is solid, movement is very slow while in such a small space, for any other ceiling block like a bottom slab movement speed is as normal

General

 * Added the,  ,  , and   particles.
 * Added the,  ,  ,  ,  ,  , and   NBT tags for turtles.
 * Added the,  ,  , and   NBT tags for phantoms.
 * Added the  statistic.
 * Used by phantoms.
 * Reset when the player leaves their bed.
 * Added the,  , and   block tags.
 * Blocks in the  tag will render in water as if any non-filled space in the block model was water.
 * Added the,  ,  ,  ,  , and   block and item tags.

Mobs

 * Squids now shoot ink in response to being attacked.
 * Zombies, skeletons, ocelots and wolves will naturally attack baby turtles, and zombies and zombie pigmen will seek out and trample turtle eggs.

Non-mob entities

 * Items in water now float up.

World generation

 * In the Nether, vertical air cavities — stretching from bedrock level to as far as Y=35, and filled with lava from bedrock level to Y=10 – now occur in chains across the bottom of the Nether, often forming extensive ravines.