Justice Strike

Removal that turns a creature's own strength against it inverts the usual math of a kill spell: the bigger the threat, the more cleanly it dies, while a zero-power utility body or a toughness-heavy wall shrugs the spell off entirely. The effect keys on power, not raw size, so the answer scales precisely with the danger. It lands hardest on the beaters whose whole reason for existing is being large, but it still kills anything whose power meets its toughness: a 1/1, a 2/1, or a 2/2 all deal themselves lethal, while a 1/3 or a 2/3 takes damage without falling. That is the strategic axis: two mana traded for a creature's own offensive weight, with the cutoff drawn exactly where power stops matching toughness. Because it resolves at instant speed, it also plays as a combat trick run backward, letting a blocker convert an incoming attacker's bulk into a death sentence mid-swing, or dropping a haste threat before it connects. The caveat worth keeping in mind is that this is damage, not destruction: an indestructible creature takes lethal self-inflicted damage and survives, since indestructibility stops that damage from finishing the job. It reads "target creature," too, so hexproof, shroud, and protection from red or white keep it off entirely. Not a catch-all, then, but a scalpel pointed at the threats that carry their own lethality.