Toxrill, the Corrosive [Innistrad: Crimson Vow Prerelease Promos] ARC016-R Discard a card with mana

Discard a card with mana value X: Counter target spell with mana value X

you may cast target instant card from your graveyard without paying its mana cost

Now we must collect on our debt

they rise to meet their enemies

you may play lands and cast spells from your graveyard

Toxrill, the Corrosive [Innistrad: Crimson Vow Prerelease Promos] ARC016-R Discard a card with manaSet: Innistrad: Crimson Vow Prerelease Promos 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, create a 1 1 black Slug creature token. {U}{B}, Sacrifice a Slug: Draw a card.