Toxrill, the Corrosive
Legendary Creature — Slug Horror
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.
, Sacrifice a Slug: Draw a card.
- CMC
- 7
- Mana cost
- Color identity
- BU
- Rarity
- mythic
- Set
- Secret Lair Drop
- Price
- $19.72
- EDHREC rank
- #2310
Toxrill, the Corrosive lands on the battlefield and immediately starts taxing every opponent's board — creatures accumulate -1/-1 counters at end of turn, the slugs it produces convert those deaths into mana and bodies, and the whole engine runs without any other pieces. Seven mana is a real ask, but Maha, Its Feathers Night and Captain N'ghathrod both hit that cost range without flinching, and neither is running Toxrill as a luxury.
Best Commanders
Commanders with the highest synergy
Captain N'ghathrod
Captain N'ghathrod mills opponents on every combat, and Toxrill, the Corrosive turns the creatures that hit the graveyard through attrition into a separate axis of pressure — slug tokens keep the board wide while N'ghathrod keeps the library shrinking.
Umbris, Fear Manifest
Umbris, Fear Manifest grows every time a card is exiled from an opponent's library or graveyard, so Toxrill, the Corrosive serves double duty: it clears blockers with -1/-1 counters and threatens enough damage that opponents are forced into bad blocks, accelerating the fear count.
Sephiroth, Planet's Heir
Sephiroth, Planet's Heir wants creatures on board to die on a schedule, and Toxrill, the Corrosive provides exactly that — steady counter accumulation means Sephiroth's conditions tick forward without needing to fire removal spells.
Tasigur, the Golden Fang
Tasigur, the Golden Fang grinds long games in the late-game resource war where Toxrill, the Corrosive is at its most punishing — by the time Tasigur is recurring spells from the graveyard, Toxrill has already reduced most opposing boards to slugs and counters.
Volrath, the Shapestealer
Volrath, the Shapestealer can copy any creature with a counter on it, which means Toxrill, the Corrosive's end-of-turn distribution turns every opponent's board into a menu of copy targets for a single -1/-1 counter placed the previous turn.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is where Toxrill, the Corrosive actually lives — seven mana is fine in a 40-life multiplayer game where the board state it dismantles is spread across three opponents, and the slug token engine generates enough board presence to matter even if Toxrill dies once. In Legacy and Vintage, seven mana is a non-starter outside of dedicated reanimator shells, and the effect doesn't line up well against fast combo or Delver-style decks where the -1/-1 drain is too slow to matter. Modern and Pioneer are theoretically legal but practically irrelevant; the cost pushes it out of any competitive consideration, and there are no meaningful ramp shells to cheat it into play on time. Oathbreaker is a reasonable home if the signature spell supports it, but Toxrill, the Corrosive is fundamentally a Commander card and should be evaluated exclusively through that lens.
Key Combos
Combo lines featuring this card
Toxrill, the CorrosiveMaha, Its Feathers Night
Reduce the toughness of creatures opponents control to 0 on each of your turns
View on Commander Spellbook ↗
Toxrill, the CorrosiveGodhead of Awe
Reduce the toughness of creatures opponents control to 0 on each of your turns
View on Commander Spellbook ↗Budget Alternatives
Cheaper options that do most of the same work
Archfiend of Depravity and Tergrid, God of Fright both attack opposing boards at a lower mana cost and price point — Archfiend caps opponent creature counts at end of turn, Tergrid converts the resulting sacrifices and discards into your own permanents. Neither replicates Toxrill, the Corrosive's self-contained token engine or the persistent counter accumulation, so you lose the slugs-as-mana line entirely, but for a deck that just wants board suppression in the five-to-six-mana range, both are viable substitutes under $5.
Price Context
Current price
$19.72 mid tier
At $19.72, Toxrill, the Corrosive sits in the mid tier — expensive enough to feel like a deliberate inclusion, not expensive enough to be a barrier for most Commander players. It appears in over 40% of Captain N'ghathrod lists and holds steady inclusion across several high-volume commanders, which suggests the price reflects genuine demand rather than speculation.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.