Minecraft 1.9: skeletons on horses

Skeletons

• Have new idle sounds.
• Skeletons can now walk, strafe and shoot at the same time.
  • They walk away from players that are too close and towards players that are too far.
    • They will also sprint towards the player when very far away.
• Now can spawn riding "skeletal horses" through the new "skeleton trap" horse.

Horses

• Added "skeleton trap" horses. When a player approaches to within 10 blocks, the following will happen:
• The SkeletonTrap flag is cleared.
• Lightning strikes the horse.
• The horse will become skeletal if it isn't already.
• The horse becomes tame.
• The horse becomes fully grown (if a baby) and the breeding cooldown is reset.
• A skeleton is spawned riding the horse when lighting strikes a skeletal horse.
  • If on peaceful, the Skeleton will not spawn, while the Horse will.
  • The skeleton has damage immunity for 3 seconds.
  • The skeleton will not despawn since they have the tag Persistence Required set to true.
  • The skeleton will be wearing an iron helmet, unless it randomly spawned with some other headgear.
  • The skeleton's bow and helmet will be enchanted as if on an enchantment table at level 5–22.
    • The level is higher depending on regional difficulty; on Easy it will always be a level-5 enchantment.
• Three additional skeletal horses with riders will be spawned in the vicinity.
• One out of 5000 chances a skeletal horses with riders will spawn in a lightning storm