Final Vengeance

Unconditional exile for a single black mana is a rate the color has almost never been handed cleanly, and the additional cost is why. Sacrificing a creature or enchantment does the balancing: this is not premium removal you slot anywhere, it is a spell that demands you already have something to feed it. That constraint reshapes the card entirely depending on the shell around it. Because it is a sorcery, the sacrifice cannot answer combat or a spell on the stack; you commit on your own turn, at your own pace, which makes the choice of what to feed a deckbuilding question rather than an instinct fired mid-combat. Where fodder is plentiful, the sacrifice becomes upside, converting a token or a spent utility body into an answer for anything: no toughness cap, no nonblack clause, no regeneration to play around, and exile sidesteps recursion and death triggers on the far side too. Where bodies are scarce, it asks whether spending two cards (the spell plus a permanent) to remove one is worth the tempo. The design descends from the tax black has always paid for its cleanest effects, priced not in life or cards drawn but in board presence surrendered up front. What you get for that price is total: exile is the most permanent removal there is, and reaching it for one mana anywhere else in the color would demand far more setup than a single creature or enchantment on the way to the graveyard.