Koma, Cosmos Serpent
Koma, Cosmos Serpent: Legendary Creature - Serpent, Murders at Karlov Manor Commander. This spell can't be countered. Prices and printings on Mana Grove.
- Mana cost
- {3}{G}{G}{U}{U}
- Mana value
- 7
- Type
- Legendary Creature - Serpent
- Colour identity
- Blue and green (UG)
- Power / toughness
- 6/6
- Rarity
- Mythic
- Set
- Murders at Karlov Manor Commander (MKC)
- Released
- 2024-02-09
- Collector number
- 213
- Artist
- Jesper Ejsing
- Commander rank
- 1,415 (by how often it appears in Commander decks)
- Commander
- Can be your commander
Build around this card with Grover
About Koma, Cosmos Serpent
Koma, Cosmos Serpent is a Magic: The Gathering card, a mythic rare blue and green legendary creature from Murders at Karlov Manor Commander (MKC), a Commander product released in February 2024. It is collector number 213 in that set, with art by Jesper Ejsing. It costs {3}{G}{G}{U}{U} (three generic, two blue and two green mana) to cast, for a mana value of 7. It is a 6/6 creature. Its colour identity is blue and green. It is legal in Pioneer, Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker, Brawl, Historic, Timeless, Gladiator and Penny Dreadful. It has been printed in 6 sets, from Kaldheim (2021) to Avatar: The Last Airbender Eternal (2025). It can be your commander. The latest aggregated market price for this printing is $5.83 (normal finish, as of 2026-11-03).
Card text
This spell can't be countered.
At the beginning of each upkeep, create a 3/3 blue Serpent creature token named Koma's Coil.
Sacrifice another Serpent: Choose one -
• Tap target permanent. Its activated abilities can't be activated this turn.
• Koma gains indestructible until end of turn.
Market price
Latest aggregated market price for the normal finish of this printing: $5.83 (as of 2026-11-03).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Koma, Cosmos Serpent 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 Koma, Cosmos Serpent
Koma, Cosmos Serpent has been printed in 6 sets. The other printings are listed newest first, with the rarity and release year of each.
| Printing | Rarity | Year |
|---|---|---|
| Avatar: The Last Airbender Eternal (TLE) #51 | Mythic | 2025 |
| Secret Lair Drop (SLD) #1765 | Mythic | 2024 |
| Magic Online Promos (PRM) #88356 | Mythic | 2021 |
| Kaldheim (KHM) #221 | Mythic | 2021 |
| Kaldheim (KHM) #326 | Mythic | 2021 |
| Kaldheim Promos (PKHM) #221p | Mythic | 2021 |
| Kaldheim Promos (PKHM) #221s | Mythic | 2021 |
Official rulings
Five official rulings apply to Koma, Cosmos Serpent, newest first.
- You can't sacrifice Koma itself to activate its last ability, but you can sacrifice any other Serpent you control, including Koma's Coil.
- If you choose the first mode of Koma's activated ability, you can choose a permanent that's already tapped as the target. The effect stopping its activated abilities will still apply.
- A spell or ability that counters spells can still target Koma, Cosmos Serpent. When that spell or ability resolves, Koma won't be countered, but any additional effects of the countering spell or ability will still happen.
- Activated abilities contain a colon and appear in the form "[Cost]: [Effect]." Some keywords such as equip are activated abilities and will have colons in their reminder texts. Loyalty abilities of planeswalkers are also activated abilities.
- The first mode of Koma's activated ability doesn't stop static abilities from affecting the game, and it doesn't stop triggered abilities from triggering. Unlike similar effects, it does stop mana abilities from being activated. Most activated abilities that produce mana as they resolve are mana abilities.
Similar cards
Other creature cards with a blue and green colour identity, ranked by how often they appear in Commander decks.
In these precons
Koma, Cosmos Serpent is in the decklist of these preconstructed Commander decks.