Agent of Treachery
Control Magic has always priced the whole card in a single stroke: four mana, take a creature, keep it forever. This design refuses that shortcut. The theft is stapled to a fragile 2/3 body, so you pay seven for a permanent you get to choose (any permanent, not just a creature: a land, an artifact, a planeswalker, whatever hurts most). The steal is unconditional and the target is wide open, so the seven mana is buying a flexibility a straight aura never had. The second clause is where the real ambition sits. The draw-three trigger asks you to control three or more permanents you don't own, and hitting that threshold off one body is the whole puzzle: the card wants to be flickered, blinked, or reanimated so its enter-the-battlefield theft fires again, each new trigger stealing another permanent and stacking toward the payoff. Resolved once, it is a slow, expensive tempo swing; built around, it turns repeated blink triggers into a card-advantage snowball. That gap between the honest one-shot and the ceiling is the design's point: the front half is a fair steal effect that stands on its own, and the back half is a reward reserved for decks willing to make the theft happen more than once.
