Angelic Arbiter

A lockdown that runs on the opponent's own choices rather than your mana. Most prison effects tax or punish: this one forces a clean either/or every turn, where casting a spell forfeits the attack and swinging forfeits the spellcasting. The elegance is that the restriction is self-imposed and binary. There is no symmetry tax on you, no upkeep payment, no counter to track; the opponent simply cannot do both halves of a normal Magic turn while this Angel is on the battlefield. The catch, and the reason it has never been a true format staple, is the body it rides in on. At a seven mana value with a 5/6 flying frame, it arrives the turn before you would have stabilized anyway, and the moment it dies the floodgates open again, so it functions as a single fragile node holding up the whole effect rather than a durable lock. That fragility is also what makes it a clean removal magnet: opponents who can answer it get their full turn back, and opponents who cannot are squeezed into picking which phase to surrender. It belongs to the lineage of white "police" creatures that legislate how combat and the stack are allowed to interact, sitting closer to the heavy-handed end of that line than the surgical one.