Unscrupulous Contractor

Sacrifice-for-cards is one of black's oldest bargains, and it usually costs its own slot: Costly Plunder and Village Rites are cheap instants, played precisely because they leave mana open and turn a dying creature into refuel without spending a whole turn. What this design does differently is fold that draw-two into a 3/2 body that was already going to hit the table, so the sacrifice engine arrives stapled to a creature rather than paid for with a separate card. The entry trigger targets a player, and that player takes both halves: two cards for two life. Aimed at yourself, it is straightforward refuel with a small tax, and that is the default line, because two cards for two life is a bargain almost anyone wants. Pointing it at an opponent only makes sense when the two life is exact lethal, or when their library is thin enough that forced draws start milling them out; otherwise you are handing the enemy a gift. Plot is what makes the timing negotiable, but only within its constraint: it casts as a sorcery, always, so this is never an instant-speed response to removal or a way to cash in a creature mid-combat. What plot actually buys is mana decoupling. Pay the cost early, while your mana is otherwise idle, then drop the Contractor for free on a later main phase once your resources are committed elsewhere and your board finally has a body worth sacrificing.