Coffin Purge

Most exile-from-yard effects of its era were single answers: cast it, strip the threat, move on. The flashback clause changes the math. One black mana now strips a target; one more black mana later, from your own bin, strips another, and the two casts spread across two turns, which is precisely the cadence a graveyard deck operates on. The first cast can snipe a flashback spell or a key reanimation target on an opponent's end step; the recast answers the next one a turn later. Against decks that rebuild from the graveyard, a spell that hits two targets over two turns is doing structural work a strictly better single-shot answer could not. The cost of that flexibility is precision: it pulls exactly one card per cast, so it never sweeps a stocked graveyard the way a mass-exile effect does. It is a scalpel, not a sweeper, and the flashback is a second incision rather than a deeper cut. Arriving alongside the keyword that first tied flashback to a graveyard-matters theme, it demonstrates exactly why the mechanic fit: a card that uses the graveyard to fight the graveyard, exiling itself on the way out so it can never become the thing it was built to stop.