Massacre Girl

A board wipe hiding inside a creature, and one whose lethality is a function of the board you drop it onto. The entry trigger is deliberately modest: a single -1/-1 sweeps only tokens and the weakest x/1s, so on an untouched field it reads more like a minor pinger. The teeth are in the second clause, which converts every death this turn into another wave of -1/-1. One creature dying to the initial shrink drops the next tier down, those deaths drop the tier above, and the cascade climbs until nothing short of a genuinely large threat survives. Crucially, the chain needs a seam to start in: a staggered spread of toughnesses (or that first vulnerable x/1) for the initial trigger to kill anything at all. A table of uniform 3/3s absorbs the opening -1/-1 without a single death, and the reaction never ignites; a ragged board of ones, twos, and threes collapses like a controlled demolition. It resolves as a chain reaction rather than a flat effect, turning the sweep into a puzzle: how much dies depends entirely on the toughness geometry across the table when she lands. Menace on a 4/4 justifies the setup, leaving a resilient attacker on a cleared field rather than a spent sorcery. She embodies black's philosophy that mass removal should cost you something and reward you for reading the game state: the sweep spares nothing you control except herself, and its size is never printed on the card, only implied by whatever your opponents were unlucky enough to build.