Rob the Archives

Impulse-draw welded to a sacrifice clause, and the seam is where the interest lives. The base spell exiles two cards you can spend only this turn: a red bargain trading permanent card advantage for immediate tempo, since anything left uncast is gone forever. Casualty 1 offers to sew a copy onto that, converting one expendable attacker into a second resolution off the trigger and taking a single spell to four cards seen. The design pitch is that the copy is not free selection layered on top; it is a body turned directly into velocity. Cast it fair and you are gambling two mana on the top of your own library, hoping the exiled pair is playable before end of turn. The math only inverts when the creature you feed it is fodder already slated to die, and a board built to spend itself reads the sacrifice as a death trigger it wanted rather than a tax it paid. Note the ceiling, though: this is a one-shot sorcery, and Casualty here caps at a single sacrifice for a single copy. There is no engine, no recursion loop, no scaling reward for over-committing bodies. You get one greedy peek, doubled once, and then the card sits in the graveyard. The pull is precisely that constraint: convert exactly one throwaway creature into a burst of cards you must cash immediately or lose.