Sludge Monster
Sludge Monster: Creature - Horror, Commander Legends: Battle for Baldur's Gate. MTG card printings, market prices, rulings, and format legality on Mana Grove.
- Mana cost
- {3}{U}{U}
- Mana value
- 5
- Type
- Creature - Horror
- Colour identity
- Blue (U)
- Power / toughness
- 5/5
- Rarity
- Rare
- Set
- Commander Legends: Battle for Baldur's Gate (CLB)
- Released
- 2022-06-10
- Collector number
- 735
- Artist
- Svetlin Velinov
- Commander rank
- 3,949 (by how often it appears in Commander decks)
Build around this card with Grover
About Sludge Monster
Sludge Monster is a Magic: The Gathering card, a rare blue creature from Commander Legends: Battle for Baldur's Gate (CLB), a draft-focused set released in June 2022. It is collector number 735 in that set, with art by Svetlin Velinov. It costs {3}{U}{U} (three generic and two blue mana) to cast, for a mana value of 5. It is a 5/5 creature. Its colour identity is blue. It is legal in Pioneer, Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker, Brawl, Historic, Timeless, Gladiator and Penny Dreadful. It has been printed in 5 sets, from Innistrad: Midnight Hunt (2021) to Commander Legends: Battle for Baldur's Gate (2022). The latest aggregated market price for this printing is $0.49 (normal finish, as of 2026-11-02).
Card text
Whenever this creature enters or attacks, put a slime counter on up to one other target creature.
Non-Horror creatures with slime counters on them lose all abilities and have base power and toughness 2/2.
Tracking it isn't the hard part.
Market price
Latest aggregated market price for the normal finish of this printing: $0.49 (as of 2026-11-02).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Sludge Monster by format. Formats in which it is not legal are not listed.
| Pioneer | Legal |
|---|---|
| Modern | Legal |
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Brawl | Legal |
| Historic | Legal |
| Timeless | Legal |
| Gladiator | Legal |
| Penny Dreadful | Legal |
Other printings of Sludge Monster
Sludge Monster has been printed in 5 sets. The other printings are listed newest first, with the rarity and release year of each.
| Printing | Rarity | Year |
|---|---|---|
| Magic Online Promos (PRM) #93932 | Rare | 2022 |
| Innistrad: Double Feature (DBL) #76 | Rare | 2022 |
| Innistrad: Midnight Hunt (MID) #340 | Rare | 2021 |
| Innistrad: Midnight Hunt (MID) #76 | Rare | 2021 |
| Innistrad: Midnight Hunt Promos (PMID) #76p | Rare | 2021 |
| Innistrad: Midnight Hunt Promos (PMID) #76s | Rare | 2021 |
Official rulings
Two official rulings apply to Sludge Monster, newest first.
- If a non-Horror creature with a slime counter on it somehow becomes a Horror, the effect making it 2/2 and making it lose its abilities ends. Its base power and toughness will revert to whatever it was before that effect started applying, although other effects that modify power and/or toughness, such as ones created by Auras, counters, and the like may still apply. It'll also have whatever abilities it had before it lost them.
- Sludge Monster's last ability affects all non-Horror creatures with slime counters on them, not just creatures that had slime counters put on them with Sludge Monster's first ability.
Similar cards
Other creature cards with a blue colour identity, ranked by how often they appear in Commander decks.