Enthralling Hold

Control Magic asks for nothing but four mana and a legal target; this one bolts on a restriction that reads like a downgrade but is really a design tell. You can only steal a creature that is already tapped, which reframes the whole spell around a specific window: an attacker committed to the red zone, a mana dork spent to pay for something, a creature that just tapped for an activated ability. The steal itself is unchanged once it resolves (permanent control, the enchanted creature is yours until the Aura leaves), but the tapped clause converts a proactive tool into a reactive one. You are punishing a board that has already moved rather than picking off whatever the opponent leans on at your leisure. That timing constraint is how a modern power curve can justify theft this permanent existing at all: effects this sticky have historically been priced steep or hedged with lifeloss or a sacrifice clause, and the tapped requirement is a cleaner cost because it demands nothing in a vacuum and everything against a board that hasn't committed. Being a sorcery-speed Aura sharpens the puzzle further, since you cannot ambush a swing in progress; the read has to happen after the opponent's turn has passed, hoping the creature you want is still tapped. Point it at an untapped board and it is a dead card. The gap between its ceiling and its floor lives entirely inside that one line about untapped targets.