Koma, Cosmos Serpent
Legendary Creature — Serpent
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.
6 / 6
- Set
- Avatar: The Last Airbender Eternal (TLE #51)
- Rarity
- Mythic
- Mana value
- 7
- Released
- 2025-11-21
- Artist
- Viacom
- EDHREC rank
- #1,470
- Colour identity
- Finishes
- Nonfoil, Foil
- Served from
- Local database
Commander bracket
Derived from card traits, not a ruling — bracket rules turn on how a deck intends to use a card. Bracket rules
EDHREC
Combos 1
Commander recommendations
Top synergy 50
Played far more in this commander's decks than elsewhere.
- Adrix and Nev, Twincasters
- Elemental Bond
- Whelming Wave
- Koma, World-Eater
- Spark Double
- Junk Winder
- Parallel Lives
- Serpent of Yawning Depths
- Irenicus's Vile Duplication
- Sakashima of a Thousand Faces
- Doubling Season
- Spawning Kraken
- Tribute to the World Tree
- Aesi, Tyrant of Gyre Strait
- Double Major
- Helm of the Host
- Kodama's Reach
- Sakashima the Impostor
- Second Harvest
- Cultivate
- Arixmethes, Slumbering Isle
- Garruk's Packleader
- Skyshroud Claim
- Rampant Growth
- Farseek
- Ohran Frostfang
- Craterhoof Behemoth
- Nature's Lore
- Summon: Leviathan
- Counterspell
- Three Visits
- Llanowar Elves
- Heroic Intervention
- Kindred Discovery
- Quantum Misalignment
- Murkfiend Liege
- Negate
- Sakura-Tribe Elder
- Roaming Throne
- Return of the Wildspeaker
- Lightning Greaves
- Combine Chrysalis
- Esix, Fractal Bloom
- Archetype of Imagination
- Mana Drain
- Swiftfoot Boots
- Birds of Paradise
- Cyclonic Rift
- Thought Vessel
- Octomancer
Most included 50
Highest share of decks running them, distinctive or not.
- Forest
- Island
- Sol Ring
- Command Tower
- Arcane Signet
- Cultivate
- Adrix and Nev, Twincasters
- Counterspell
- Whelming Wave
- Elemental Bond
- Kodama's Reach
- Hinterland Harbor
- Rampant Growth
- Koma, World-Eater
- Spark Double
- Reliquary Tower
- Beast Within
- Nature's Lore
- Breeding Pool
- Junk Winder
- Parallel Lives
- Growth Spiral
- Aesi, Tyrant of Gyre Strait
- Serpent of Yawning Depths
- Farseek
- Yavimaya Coast
- Heroic Intervention
- Dreamroot Cascade
- Rejuvenating Springs
- Llanowar Elves
- Doubling Season
- Three Visits
- Irenicus's Vile Duplication
- Sakashima of a Thousand Faces
- Birds of Paradise
- Simic Growth Chamber
- Negate
- Flooded Grove
- Spawning Kraken
- Double Major
- Arixmethes, Slumbering Isle
- Swiftfoot Boots
- Tribute to the World Tree
- Cyclonic Rift
- Pongify
- Helm of the Host
- Elvish Mystic
- Lightning Greaves
- Simic Signet
- An Offer You Can't Refuse
Format legality
Rulings
- 2021-02-05
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.
- 2021-02-05
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.
- 2021-02-05
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.
- 2021-02-05
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.
- 2021-02-05
You can't sacrifice Koma itself to activate its last ability, but you can sacrifice any other Serpent you control, including Koma's Coil.