Java Edition 17w17a

17w17a is the eight snapshot released for 1.12.

General

 * Sounds


 * New note block sounds
 * Bone block = xylophone
 * Block of gold = bell
 * Clay = flute
 * Packed ice = chime
 * Wool = guitar


 * New sound effects
 * Parrots
 * Illusion illagers
 * Casting a fishing rod
 * Reeling in a fishing rod
 * Putting ender eye in end portal frames (dinging sound)
 * Completing the end portal and having the portal spawn (evil sound)
 * Throwing an eye of ender
 * An eye of ender exploding or popping back into item form
 * Boat paddles


 * NBT tags


 * New  NBT tag to command blocks, useful for loops


 * Advancements


 * Added lots of new advancements


 * Some features:

/advancement grant dinnerbone until story/elytra /advancement revoke dinnerbone everything "Both [...] have: everything from until through only [criterion]" from = "this one & its children & their children etc" until = "this one & its parent & its parent etc" through = both of the above

General

 * Advancements


 * Moved some existing advancements around


 * Advancements can now trigger commands as rewards


 * Advancement icons now allow data values


 * Colors


 * Reverted the purple shulker color change


 * Gave terracotta blocks unique colors on the map


 * Crafting


 * Optimized the recipe book a little

Mobs

 * Tweaks to the difficulty of the illusioner