Java Edition 15w32a

15w32a is the fourth snapshot released for 1.9.

Additions

 * World selection screen
 * Worlds now display the version they were last played in, or "unknown" if the version was older than snapshot 15w32a.
 * If the world hasn't been opened in one of the (1.9) snapshots yet, there will be an exclamation mark (!) next to the world's name on the far right that displays text when hovered over: "Don't forget to backup this world before you load it in this snapshot."
 * Statistics
 * Tracks the amount of ticks the player has held the key, regardless if the player was moving.
 * Mobs
 * Creepers, skeletons and zombies must be closer to notice players wearing their corresponding mob head.
 * Does not apply to wither skeletons.
 * Specifically, the detection range is halved.
 * This reduction stacks with the reductions from sneaking and invisibility.
 * Scoreboard
 * Added three new objective types: XP, hunger and oxygen.
 * "xp" can be used to track the players exact XP level without any intermediate step.
 * "food" can be used to track the hunger level of the player (ranges from 0 to 20).
 * "air" can be used to see for how long the player has been underwater.
 * Starts at 300 (out of water) and then decreases 1 per tick as long as the player's head is underwater (resets when the player exits the water).
 * The water breathing effect freezes the timer and the respiration enchantment slows down the countdown each time more with each level.
 * The water breathing effect freezes the timer and the respiration enchantment slows down the countdown each time more with each level.

Changes

 * Ender Dragon
 * Dragon fireballs now give off Ender Acid particles upon exploding and no longer light ground on fire
 * Dragon charge/knockback attack is back
 * Dragon wings now damage the player, prevent side and back melee attacks when the dragon lands on the portal
 * Dragon breath now shoots out farther
 * Dragon will now immediately charge at you after finishing the ender acid attack
 * Ender acid attack now goes around the whole portal
 * Ender acid attack is now stopped when the dragon is damaged
 * Dragon will not stop attacking from single hits
 * Will now fly back to portal before finishing the death animation.
 * No longer takes damage from snowballs, eggs, or other attacks that normally do no damage.
 * NBT Tags
 * DataVersion tag can now be applied on entities