Java Edition 17w17a

17w17a is the eighth snapshot released for 1.12.

General

 * Advancements


 * Added new advancements


 * NBT tags


 * New  and   NBT tags to command blocks, useful for loops


 * Sounds


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


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

General

 * Advancements


 * Moved some existing advancements around
 * Advancements can now execute commands when achieved
 * Advancement icons now allow data values


 * Crafting


 * Optimized the recipe book

Blocks

 * Terracotta
 * It has now unique colors on the map

Commands

 * Added five modifiers to the command: "everything", "from", "until", "through", "only"
 * Examples:
 * Examples:

/advancement grant dinnerbone until story/elytra /advancement revoke dinnerbone everything "Both [...] have: everything from until through only [criterion]" everything = "all achievements", no specification required from = "this one & its children & their children etc" until = "this one & its parent & its parent etc" through = both of the above only = "this one"

Mobs

 * Illusioner
 * Its blindness spell will only be cast if the regional difficulty is 3 or above.


 * Shulker
 * Reverted the purple shulker color change from 17w16a.