Expert Mode Withers

The Wither, a mob hostile to life itself! A few changes and this mob is a force to be reckoned with! Firstly, the wither is resistant to all damage, though sharpness and smite make quick work of the Wither. It's skulls are the true danger during the fight, as they inflict the wither status effect and raise ancient skeletons from the ground to fight alongside it. While these reinforcements don't stick around for long in the world, they can be killed for more chances at collecting wither skeleton skulls.

(Speedrunners and redstone automators be warned, the Wither is immune to suffocation)