Toxrill, the Corrosive (VOW) #321 [EN/N]

{5}{B}{B} · Legendary Creature — Slug Horror · 7/7 · 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, create a 1/1 black Slug creature token. {U}{B}, Sacrifice a Slug: Draw a card. · Illustrated by DZO · Innistrad: Crimson Vow #321 · EDHREC rank 2331 · Magic: The Gathering, MTG