Infernal Captor

Exploit has always been a two-for-one: sacrifice a creature you no longer need, cash the death trigger for something better. Here the something better is a Threaten stapled to the same trigger. Feed it a token, a body that already delivered its value, or a piece of aristocrats fodder, and in exchange you gain control of a target artifact or creature until end of turn, untap it, and give it haste. The theft is the payoff for the sacrifice, and the interesting axis is what you do with the borrowed permanent before the turn ends. A stolen creature you must return is normally just a one-shot attacker, but pair this with a sacrifice outlet and the "until end of turn" clause stops being a limitation: sacrifice the borrowed permanent and it goes to its owner's graveyard rather than back to their battlefield. That converts a temporary Threaten into hard removal, folded into a single enters-the-battlefield window. The exploit clause is optional, so the 3/3 body is never a liability when nothing is worth trading, but the ceiling assumes a graveyard-and-sacrifice shell that wants both halves working at once: fodder on the way in, a stolen permanent worth stealing on the way out. It is a converter, turning a spent creature into tempo, an alpha-strike swing, and a way to permanently strip an opponent's best threat off the board.