Dread Defiler

Most black decks treat their graveyard as a reanimation reserve; this one strips it for parts. Each activation feeds a creature card into exile and converts its power straight into life loss, inverting the usual relationship a deck has with its own dead. A fat body in the bin isn't a target to bring back, it's a shell loaded into the cannon, and the bigger the creature the harder the drain. Because the ability reads the exiled card's power rather than a fixed number, anything with characteristic-defining power counts for whatever it happens to be as it leaves the yard. What gates who can actually run it is the in the activation cost, which pulls the mana base toward Wastes and colorless producers rather than a Swamp-heavy pile; paired with seven mana for the 6/8 frame, this is a payoff for a deck already committed to the colorless side of its identity, not a splash. Devoid does quiet structural work too: the card is mechanically colorless, so nothing that keys protection or hexproof off black slows the ability, and because the effect is life loss rather than damage, it slips past prevention and redirection entirely. There is no tap in the cost and no once-per-turn clause, so with enough colorless mana the graveyard empties in a single chain, each corpse a separate payment. The oversized body is almost incidental: it holds the ground while the yard fills, then becomes the platform the gun sits on.