Maalfeld Twins

The math runs in one direction: kill the 4/4 and its controller replaces it with two 2/2 bodies, so removal spends a card to trade one 4/4 for a fresh four power split across two Zombies. That is not a tempo win (at six mana, almost anything that answers it costs less than it cost to cast, and the controller is usually behind on the raw exchange), but it is a value win. The split into two tokens is the reason spot removal makes a poor trade here, and a board sweeper leaves a pair of survivors where most fat creatures leave bare board. The same death trigger reads as fuel for a sacrifice outlet: feed the 4/4 to a Carrion Feeder or a Viscera Seer and you convert one body into two before anyone gets a vote, a one-shot multiplier rather than a recurring engine. What the card asks in return is patience with a heavy rate: the cost buys durability, not speed, and the payoff only arrives after the creature is already dead. That is the hook, a fatty you actively want traded off, and it plants the design in the slow, grinding half of black's toolbox rather than the curve-out aggressive half.