Bane of the Living is a rare Creature — Insect card from Legions (LGN), collector number 60. Current market price: $4.07 (foil $49.99), TCGplayer market prices via Scryfall.
Morph {X}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, all creatures get -X/-X until end of turn.