Toxrill, the Corrosive [Innistrad: Crimson Vow]

Set: Innistrad: Crimson Vow Type: Legendary Creature — Slug Horror Rarity: Mythic Cost: {5}{B}{B} At the beginning of each end step, put a slime counter on each creature you don't control. Creatures you don't control get -1/-1 for each slime counter on them. Whenever a creature you don't control with a slime counter on it dies, creature a 1/1 black Slug creature token. {U}{B}, Sacrifice a Slug: Draw a card.