Goremand

The double edict is the whole trade here, and it costs you a body before the card ever hits the table. Sacrificing a creature to cast it is the front-loaded tax; the enter trigger then strips a creature from each opponent. Against a single blocker you break even on the exchange while landing a 5/5 flier with trample, which is the point: the fodder you spent goes toward pushing damage over the top rather than getting chumped. The design works cleanest when the creature you sacrifice was already earning its keep elsewhere, a token, a mana dork that has finished ramping, a creature with a death trigger, so the additional cost reads as a bonus rather than a loss. Against a board that has been swept, the additional cost bites hardest: no creature to sacrifice means no spell, and the edict resolves into nothing on the opponent's side too. That fragility is the counterweight to a stat line and a two-for-one that would otherwise be undercosted. Demons in black have long carried a price of admission written into their casting, from the life payments of the earliest ones to the tribute mechanics that came later; this one demands creatures on both ends of a single transaction, folding the removal and the payment into one cast rather than an ongoing obligation. You pay once, at the door, in bodies.