Cheapest priced copy (Innistrad: Crimson Vow): $23.99 at Card Kingdom, near mint, their price list as of .
Toxrill, the Corrosive 
Legendary Creature — Slug Horror · 7/7 · Mythic · The List · #VOW-132
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.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $23.99 to $94.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 399 | Mythic | $24.99 | $94.99 |
| The List | VOW-132 | Mythic | — | — |
| Innistrad: Crimson Vow Promos | 132p | Mythic | $24.99Out of stock | $27.99 |
| Innistrad: Crimson Vow Promos | 132s | Mythic | — | $29.99Out of stock |
| Secret Lair Drop (Gary, the Snail) | 1929 | Mythic | $27.99 | $29.99 |
| Innistrad: Crimson Vow | 132 | Mythic | $23.99 | $27.99 |
| Innistrad: Crimson Vow | 321 | Mythic | $23.99 | $27.99 |
3 rulings from Wizards of the Coast
- 19 November 2021Toxrill. the Corrosive's second and third abilities apply to all creatures you don't control with slime counters, even if those slime counters came from a source other than Toxrill's first ability.
- 19 November 2021Another card, Sludge Monster, causes non-Horror creatures with slime counters on them to lose all abilities and have base power and toughness 2/2. If you control both Toxrill and Sludge Monster, those non-Horror creatures are 2/2 creatures with no abilities that also get -1/-1 for each slime counter.
- 19 November 2021Toxrill's third ability triggers when a creature an opponent controls with a slime counter on it dies for any reason, not just due to its toughness being decreased by Toxrill's second ability.