The demon of mental anguish is back from Diablo 2. She carries with her the heads of slain foes and heavy chains.
The Butcher is back, randomly appearing in Dungeons. He has a chance to drop his Butcher's Cleaver.
Returning from Diablo 2, the Lord of Pain burrows into the ground, releasing numerous maggots to fight.
Ashava is a giant dragon that breathes poison and has wings with talons, which it tries to sweep players with.
Avarice wields a spiked club in one hand and a chained loot crate in the other. It can also teleport.
Lilith is taking center stage early in Diablo 4's storyline, but Diablo will likely appear in later down the road.
The main villain of Diablo 4, Lilith, Mephisto's daughter has been resurrected to spread misery.
Boss stagger bar
Bosses now have a stagger bar that accumulates damage from players' Crowd Control attacks.
Players can randomly come across massive bosses in the open world. These require multiple players to slay.
More animated and challenging bosses
Diablo 4 will feature a mix of familiar bosses (e.g., Andariel and Duriel) and newcomers (e.g., Blood Biship and Drowned Witch). Each has a few unique special attacks. Also, each boss has distinct injury and death animations that should feel rewarding to victorious player. Massive bosses, called World Bosses, randomly spawn in Sanctuary and require multiple players to kill. At launch, there will be three World Bosses.