Overtaker

Threaten rebuilt as a Spellshaper engine: the one-shot steal pinned to a fragile 1/1 and gated behind a card discarded every activation. Where a single-use steal sorcery fires once and goes to the graveyard, this version fires again each turn the discard can be sustained, converting a temporary effect you can only cast once into one you can repeat. The cost is steep: four mana, a tap, and a fresh card pitched from hand each time, all to commission a body that any removal spell answers before it ever does anything, so the line presumes you are flush on resources before the engine comes online. The untap clause rewards a second look. It pulls availability out of something already exhausted in combat or tapped down, then loans it haste, which means the steal works just as well on a defender as on a fresh attacker: nothing on the opposing board is safely committed to blocking. Whether the rental is worth it turns on what gets borrowed. Renting a vanilla beater for a turn rarely earns the cost. Borrowing a creature you intend to feed to a sacrifice outlet, or send under a bus in combat, turns the loaned control into something that outlasts the end step. That conditional conversion, not the raw rate, is where the design actually lives, and it is the difference between a curio and a value loop.