Witch

Witches are hostile mobs that will be added in Update 0.14.0. They use splash potions as their ranged weapon. They also use beneficial potions on themselves defensively. They also can be quite difficult to kill. And will kill your dogs with ease.

Spawn
Witches spawn in Witch Huts in Swamp Biomes. Witches can also spawn when a villager is struck by lightning.

Behavior
Witches use splash potions offensively, and drink ordinary potions defensively. They have a search radius of 16 blocks.

Offense

 * They will throw a Potion of Slowness if the player is at least 8 blocks away and does not already have the Slowness status effect.
 * They will throw a Potion of Poison if the player's health is at least 8 Health Points and is not already poisoned.
 * They have a 25% chance of throwing a Potion of Weakness if the player is within 3 blocks and does not already have the Weakness status effect.
 * If none of the above conditions are true, witches use a potion of harming.

Defense
On each AI tick when the witch is not already drinking a potion, it may choose to equip and drink a potion. Drinking the potion takes 1.6 seconds.
 * When under water and lacking Water Breathing, 15% chance of drinking a Potion of Water Breathing.
 * When on fire and lacking Fire Resistance, 15% chance of drinking a Potion of Fire Resistance.
 * If damaged, 5% chance of drinking a Potion of Healing.

Witches are 85% resistant to damage from magic, including Poison, Instant Damage, and Thorns.

Combat
The best way to kill Witch is use a Bow. The player can also use a Iron or Diamond Sword along with a Potion of Strength to kill them.

Trivia

 * If a witch hits another witch with a potion, the witch who is hit will become hostile and will target the other witch.
 * However it is impossible for either witch to kill the other without the help of a player or mob due to their use of Potions of Healing and their resistance to each other's splash potions.
 * If a player kills a witch when it's drinking a potion, it will drop the potion as an equipment drop.