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Koma, Cosmos Serpent

First printed in Kaldheim (2021)

All 8 prints

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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

Illustrated by
Jesper Ejsing

Legality

Rulings (5)

  • 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.
  • 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.
  • 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.
  • You can't sacrifice Koma itself to activate its last ability, but you can sacrifice any other Serpent you control, including Koma's Coil.
  • 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.

Prices

MTGO price: 0.01 TIX, the cheapest non-foil print (average sell price on GoatBots, 1 Nov 2026).

In Limited on MTG Arena

Win rates in Arena drafts and sealed, retrieved from 17Lands (CC BY 4.0).

Win rates of Koma, Cosmos Serpent in Limited
Set GIH WR vs set IWD Games
Kaldheim (KHM), Premier Draft 70.1% +15.6 +22.1 4476
GIH WR
win rate of the games in which the card was in the opening hand or drawn
vs set
points above or below the average win rate of all decks in the set
IWD
improvement when drawn: GIH WR minus the win rate when the card stayed in the library
Games
games in which the card was seen

Combos

1 combo:

Pioneer In 2 of 649 decks (0.3%), most in Golgari Midrange

Share of decks
0.3%
▲ 0.3 vs previous 30 days
2026-08-10: 0.0% 2026-08-17: 0.0% 2026-08-24: 0.0% 2026-08-31: 0.0% 2026-09-07: 0.0% 2026-09-14: 0.0% 2026-09-21: 0.0% 2026-09-28: 0.0% 2026-10-05: 0.0% 2026-10-12: 0.0% 2026-10-19: 0.0% 2026-10-26: 1.3%
Weekly, last 90 days
Decks
2
1 main, 1 sideboard
Avg. copies
1.0
in the main deck
Win rate
54%
1 top 8 (challenges only)

Archetypes by metagame share

Archetype Meta Play it
Golgari Midrange 13.3% 1%
WUBRG (unclassified) 4.6% 3%

Played together with

Not enough decks yet.

Best win rate

DeckRecord
Golgari Midrange
Mathilde8 in Pioneer Challenge 16
4-3
57%
WUBRG
Redman1034 in Pioneer Challenge 32
3-3
50%

Challenges only: MTGO publishes only the 5-0 league decks.

Latest decks

DeckCopiesFinish
Golgari Midrange
Mathilde8,
1 side #6 (top 8)
of 35
4-3
WUBRG
Redman1034,
1 main #20
of 48
3-3

Commander In 11 of 6550 decks (0.2%), most in Kinnan, Bonder Prodigy

Share of decks
0.2%
▼ 0.1 vs previous 30 days
2026-08-17: 0.0% 2026-08-24: 0.3% 2026-08-31: 0.3% 2026-09-07: 0.2% 2026-09-14: 0.2% 2026-09-21: 0.3% 2026-09-28: 0.4% 2026-10-05: 0.4% 2026-10-12: 0.1% 2026-10-19: 0.1% 2026-10-26: 0.1%
Weekly, last 90 days
Decks
11
11 main, 0 sideboard
Avg. copies
1.0
in the main deck
Win rate
12%
1 top 8 (challenges only)

Archetypes by metagame share

Archetype Meta Play it
Kinnan, Bonder Prodigy 7.4% 1%
Hakbal of the Surging Soul 0.1% 25%
Zimone, Mystery Unraveler 0.0% 33%
Aesi, Tyrant of Gyre Strait 0.0% 100%
Mr. Foxglove 0.0% 100%

Played together with

Card Together Lift
Arcane Signet100%1.6
Command Tower100%1.2
Sol Ring100%1.0
Breeding Pool82%3.6
Birds of Paradise82%1.8
Misty Rainforest82%1.1
Rejuvenating Springs73%7.6
Seedborn Muse73%6.7
Hullbreaker Horror73%5.8
Elvish Mystic73%4.4

Best win rate

DeckRecord
Kinnan, Bonder Prodigy
BlastMaster in CEDH SABANA - Cedh x Dual 2da edición VOLCANIC ISLAND
2-5
29%
Kinnan, Bonder Prodigy
Edgar G 🤓 // JUNiTØ in FOIL Gaea's Cradle cEDH 6k
1-4
20%
Aesi, Tyrant of Gyre Strait
Cesar Andres Mendoza in CEDH SABANA - Cedh x Dual 2da edición VOLCANIC ISLAND
0-6
0%
Kinnan, Bonder Prodigy
Mohamed Chahine(moshun) in BAKED ZITI 4: Goldsabertooth’s NY cEDH
0-5
0%

Challenges only: MTGO publishes only the 5-0 league decks.

Latest decks

DeckCopiesFinish
Hakbal of the Surging Soul
Brandon Guttry,
1 main #21
of 29
0-3
Kinnan, Bonder Prodigy
Nils Schiffer,
1 main #38
of 39
0-3
Kinnan, Bonder Prodigy
Chayton Garst,
1 main #17
of 51
1-2
Kinnan, Bonder Prodigy
BlastMaster,
1 main #9
of 50
2-5
Aesi, Tyrant of Gyre Strait
Cesar Andres Mendoza,
1 main #42
of 50
0-6
Kinnan, Bonder Prodigy
Emily Chapman,
1 main #27
of 29
0-4
Zimone, Mystery Unraveler
David rojas bueno,
1 main #7 (top 8)
of 22
0-2
Mr. Foxglove
Caín Orta González,
1 main #10
of 22
0-2