The Cauldron of Eternity

The twelve printed on the mana cost is a starting bid, not a price. Every creature card in your graveyard shaves two off the total, so a black deck that has been trading bodies all game arrives at this for a pittance, sometimes for nothing but the double-black pips. That self-financing curve is the engine, and it is welded to a nastier clause than the reanimation it advertises. The redirect is a triggered ability, not a replacement: creatures you control still die, still hit the graveyard, still fire their death triggers and offer a window for instant-speed responses, and only then get placed on the bottom of the library. The scope is the whole trick. The graveyard that priced this artifact stops keeping the fodder you feed it, because the very bodies that would refill it are peeled off as they arrive. The sorcery-speed reanimation, two life per return, is the payoff; the redirect is the tension it resolves. You are not shut out of fuel entirely, since milling and discarding still stock the yard with creatures the trigger never touches, but any creature you play and lose becomes a one-shot on its way to the bottom of the deck. What reads as an inevitable value loop behaves like a one-way valve: it spends down the graveyard that made it cheap while quietly refusing to let its own casualties replenish it, expensive to unlock and stingy about staying fed, built for grindy black decks patient enough to have banked a graveyard before they reach for it.