Szat's Will

The commander clause is the design pivot here, and it works differently than the usual "if you have your commander" upside. Both modes are already playable in a vacuum: a forced sacrifice of the biggest creature per opponent handles the exact threats that dodge sweepers, and the graveyard-exile mode doubles as recursion hate while paying you back in bodies scaled to whatever you removed. What the commander condition does is let you fire both from a single instant, and the two halves are sequenced to feed each other: the sacrifices dump the biggest creatures into their owners' graveyards, and the second mode then exiles those graveyards to determine how many Thrull tokens you get. Cast with a commander out, the same spell can strip a board of its best attackers and hand you an army built from their corpses. Expensive enough that neither mode alone justifies the slot in a fair deck, generous enough that the both-modes line reads like a two-card play folded into one instant. The color identity is pure black, and the effect draws on two of black's foundational tools at once: forced sacrifice and graveyard exile.