Demonic Covenant (49)

Duskmourn: House of Horror Commander Demonic Covenant Kindred Enchantment Demon Whenever one or more Demons you control attack a player, you draw a card and lose 1 life.
At the beginning of your end step, create a 5/5 black Demon creature token with flying, then mill two cards. If two cards that share all their card types were milled this way, sacrifice Demonic Covenant. Illustrated by LA Draws All Magic: The Gathering (MTG) card images and symbols Wizards of the Coast