Garramorath, Overlord

Firststrike, lifelink, vigilance, deathtouch, menace, hexproof, indestructible, trample, reach, haste
Ravage(All creatures able to block this creature do so.)
When Garramorath, Overlord Enters the battlefield, an opponent may choose to lose the game. If he or she does, exile Garramorath, Overlord. Then, destroy all permanents.
If a demon you control would leave the battlefield, return it to the battlefield at the beginning of your next upkeep.