Frenzied Fugue

A repeating Threaten that only asks once. One-shot steal effects (Act of Treason and its many cousins) borrow a creature for a single attack and hand it back; the Aura model converts that one-time theft into a standing tax on the enchanted permanent, returning control at the beginning of each of your upkeeps for as long as the enchantment stays attached. The trade is in the structure: you sink four mana up front and a card onto the battlefield, where it sits as a removable target, in exchange for an effect that compounds across your turns rather than evaporating after one combat. That it enchants any permanent rather than just a creature widens the design past the usual borrow-a-beater frame: a stolen mana rock untaps and produces for you, an artifact or land with a tap ability becomes yours to fire each turn, a planeswalker can be aimed back at its owner. The untap-and-haste clause is what makes the steal immediately useful rather than symbolic, so a permanent that already attacked or tapped out arrives ready to act. The catch worth respecting is that the upkeep grant is a resolved triggered ability with a fixed duration: control lasts until end of turn, so destroying the Aura mid-turn does not snatch the permanent back early. The owner waits out the clock rather than reclaiming it on the spot. If you mean to keep what you take, the conversion has to happen inside that window: sacrifice it, flicker it, or trade it before control reverts on its own.