Minecraft wiki entry for Wither, associated text: The withering effect after being damaged by a Wither Skull.
The "wither armor" that blocks arrows.
The wither and its armor.
A larger image to show how to summon the wither.
The wither prepares for explosion with the invulnerable status after summoned.
The pit created after the wither has charged.
The wither attacking horses.
The Wither's texture.
Wither attacking a sheep.
Wither attacking a village.