Massacre Wurm

The black answer to a board full of small creatures that doubles as a punishment engine. A board sweep stapled to a fat body is nothing new, but the second triggered ability is what reorients the card: every creature an opponent loses to the entry sweep costs them two life, so a wide token board becomes a life-total avalanche the moment this resolves. The -2/-2 is the setup; the death trigger is the payoff, and the two read as one motion only because both fire off the same wave of dying creatures. That death trigger keeps working after the enter sweep, too, turning subsequent removal and combat losses into a slow bleed for as long as the Wurm sticks. The trade is breadth of effect for narrowness of reach: -2/-2 kills only what has two toughness or less, so anything with three or more toughness shrugs it off entirely. That makes this a scalpel for go-wide strategies and a near-blank against fatties. The triple-black cost is the other tax, pinning it to decks committed enough to black to cast it on curve. What makes the design hold up is that it never overpromises against the boards it cannot beat; it is built to obliterate exactly one kind of opponent, the one flooding the table with cheap bodies, and against that opponent it does not just clear the board, it ends the game.