Eaten Alive

Unconditional exile in black comes at a price, and this card writes that price into the casting cost rather than the effect. Black has historically paid for permanent removal in life (Vindicate-style clean answers live in white) or in restriction (edict effects that let the opponent choose, destruction that dodges regeneration but not indestructibility). The wrinkle here is a bimodal additional cost: sacrifice a creature and the exile costs a single black mana, or keep your board and pay on top of the base for five mana total. That split makes the card two different tools depending on the deck. In a sacrifice shell with fodder to spare, it is among the cheapest ways black has to answer an indestructible threat or a planeswalker outright; in a deck with nothing to feed it, it settles into a five-mana catch-all that still hits both permanent types cleanly. The design lets one card serve the grinding aristocrats deck and the fair midrange deck without printing two cards, and it pays for exile (the tightest removal in the game: no recursion, no regeneration, no indestructibility loophole) by asking you to spend a creature you were probably going to lose anyway. The tension it resolves is black's long discomfort with cheap, no-strings exile: hand it out only to the deck already built to sacrifice, and charge everyone else the full toll.