Diablo, the Prime Evil

Deathtouch
When Diablo, the Prime Evil or another Demon enters the battlefield, destroy target permanent with a converted mana cost of 4 or greater. Deal 4 damage to its controller.
When Diablo, the Prime Evil dies, destroy all nonland permanents. Create an X/X black Horror creature token, where X is the total amount of permanents destroyed this way plus 3.