Mutiny

Removal that costs you nothing but a single red mana and turns an opponent's own board against itself: one of their creatures pulls the trigger, another of their creatures takes the hit. The wording matters, and it is where the whole thing turns. Both targets must belong to the same opponent, and the damage is dealt by their creature, so you are not spending any of your own bodies; you are conscripting theirs, using the power of one to erase another. The size of the kill is dictated entirely by whichever attacker you point, which makes this a removal spell that scales with the opponent's board rather than yours: dead in hand against a single threat, brutal into a wide field where a fat body can be aimed at the small thing you actually want gone. Red rarely gets to kill toughness it could not burn through on its own, and this sidesteps that ceiling by borrowing power it does not own. The friction is structural: it demands two creatures on one opponent's side and a real power gap between them, so it whiffs against decks presenting a lone threat and overperforms against go-wide boards that hand you both halves of the equation. It is the sort of conditional, board-dependent answer red leans on to stretch into roles its slice of the color pie does not normally grant, trading reliability for a price almost nothing else in the color can match.