Java Edition 18w08a

18w08a is the twenty-first snapshot released for 1.13.

Additions

 * World generation
 * Added underwater caves and ravines.
 * Magma blocks spawn at the bottom of ocean ravines at lava levels, creating downward bubble columns.


 * Biomes
 * Added  (Warm Ocean),   (Lukewarm Ocean),   (Cold Ocean),   (Deep Warm Ocean),   (Deep Lukewarm Ocean),   (Deep Cold Ocean), and   (Deep Frozen Ocean).
 * (FrozenOcean) now generates.


 * Commands
 * Added a clickable teleport link to the command output.

Changes

 * Sounds
 * Added a new sound effect for squids shooting ink.