Gelor, Lord of Pain

Deathtouch

Other Demons you control have “Whenever this creature deals combat damage to a player, exile the top card of that player's library. Until end of turn, you may play that card.”

At the beginning of combat on your turn, create a 2/1 black Demon creature token with deathtouch and haste.

At the beginning of your end step, each player loses life equal to the number of Demons you control.