Rite of Oblivion

Unconditional exile has always been white and black's expensive privilege: no "return to owner," just gone. The trade here is that the removal is priced in permanents rather than mana. You pay two, but the load-bearing cost is a nonland permanent off your own board, which reframes the card entirely. It stops being a clean answer and becomes a conversion engine: turn a spent token, a chump blocker, an exhausted creature, or a dead artifact into the exile of something you actually fear. In a deck stocked with expendable bodies (aristocrat fodder, treasure, saprolings, anything already earmarked to die), the additional cost approaches free, and hard exile at two mana is a rate few colors ever see. Flashback closes the loop by letting you run the fodder-into-removal exchange from the graveyard as well, the exact grinding tempo an attrition deck wants against threats that recur. The additional-cost framing is unforgiving about its terms: because the sacrifice is not optional, you cannot even cast the spell without a nonland permanent to feed it, so the worst case is spending something you value to answer something you fear, a one-for-one that feels like a two-for-one. The best case is timing it while you were already sacrificing for value, where one of the most permanent answers in the game costs you nothing extra. That gap between the two casting contexts, not the mana, is where the card lives.