Koma, Cosmos Serpent commander decks

{U}{G}Simic commanders

We track 632 decks led by Koma, Cosmos Serpent.

Deck numbers as of October 5, 2026 · refreshed weekly

Search all Koma, Cosmos Serpent decks
The card$4.87+21.8% in 30 daysas of Oct 5Price history for Koma, Cosmos Serpent
Decks led
632

0.08% of the 787,845 legal decks we track.

Median deck price
$489

Most cost $119 to $2,981.

Median power
5.2

Most rate 4.2 to 6.9 on the 1 to 10 EDH power level scale.

Median salt
3.5

Most score 2.8 to 5.1 out of 10.

Most often built as tokens (42%), then lands matter (20%).

Real Koma, Cosmos Serpent decks

Real decks from our database, picked from this commander's own price range and from every bracket people build it in. Open any of them for the full list. The picks rotate weekly.

By budget

  • Budget build
    $117
    price
    5.5
    power
    2.8
    salt
    Bracket 3 (Upgraded)
    {U}{G}midrange
    Find more Koma decks
  • Typical build
    $444
    price
    5.1
    power
    3.0
    salt
    Bracket 3 (Upgraded)
    {U}{G}midrange
    Find more Koma decks
  • High-end build
    $3,406
    price
    5.7
    power
    4.1
    salt
    Bracket 4 (Optimized)
    {U}{G}midrange
    Find more Koma decks

By bracket

  • Bracket 1 · Exhibition
    $19.20
    price
    4.1
    power
    2.4
    salt
    Bracket 1 (Exhibition)
    {U}{G}midrange
    More bracket 1 Koma decks
  • Bracket 2 · Core
    $13.27
    price
    1.3
    power
    2.7
    salt
    Bracket 2 (Core)
    {U}{G}midrange
    More bracket 2 Koma decks
  • Bracket 3 · Upgraded
    $359
    price
    5.0
    power
    3.2
    salt
    Bracket 3 (Upgraded)
    {U}{G}midrange
    More bracket 3 Koma decks
  • Bracket 4 · Optimized
    $3,033
    price
    5.8
    power
    4.8
    salt
    Bracket 4 (Optimized)
    {U}{G}midrange
    More bracket 4 Koma decks
  • Bracket 5 · cEDH
    $1,357
    price
    8.4
    power
    4.3
    salt
    Bracket 5 (cEDH)
    {U}{G}combo
    More bracket 5 Koma decks

Koma, Cosmos Serpent decks by price and bracket

Deck prices

$0 to $50: 17 decks.
$50 to $100: 31 decks.
$100 to $150: 46 decks.
$150 to $200: 39 decks.
$200 to $300: 65 decks.
$300 to $400: 58 decks.
$400 to $500: 66 decks.
$500 to $750: 122 decks.
$750 to $1,000: 40 decks.
$1,000 to $1,500: 47 decks.
$1,500 to $2,000: 15 decks.
$2,000 to $3,000: 24 decks.
$3,000 and up: 62 decks.

Decks per price band. The highlighted band, $400 to $500, holds the median deck at $489. 172 of these decks cost $250 or less.

WotC brackets

  • Bracket 1 (Exhibition)16% · 104
  • Bracket 2 (Core)8% · 50
  • Bracket 3 (Upgraded)37% · 233
  • Bracket 4 (Optimized)36% · 229
  • Bracket 5 (cEDH)3% · 16

Search Koma, Cosmos Serpent decks by budget and bracket

The deck search narrows every Koma, Cosmos Serpent deck we track by price, power, bracket and salt.

Search all Koma, Cosmos Serpent decks
Under $100 (48) Under $250 (172) Bracket 3 builds (233)

What Koma, Cosmos Serpent decks play

The 40 cards found most often across these 632 decks, with each card's current price. The bar is the share of decks running the card, and its green part is how far that share runs above the card's rate in every deck that could play it.

Creatures10

  • Adrix and Nev, Twincasters73%$8.04
    Run in 462 of these decks (73%), 4% of decks that could run it.
  • Koma, World-Eater60%$0.64
    Run in 381 of these decks (60%), 3% of decks that could run it.
  • Spark Double59%$5.03
    Run in 375 of these decks (59%), 6% of decks that could run it.
  • Llanowar Elves58%$0.26
    Run in 368 of these decks (58%), 24% of decks that could run it.
  • Serpent of Yawning Depths54%$9.83
    Run in 344 of these decks (54%), 1% of decks that could run it.
  • Junk Winder53%$0.29
    Run in 334 of these decks (53%), 1% of decks that could run it.
4 more creatures

Instants8

  • Counterspell76%$1.62
    Run in 479 of these decks (76%), 46% of decks that could run it.
  • Heroic Intervention60%$9.06
    Run in 379 of these decks (60%), 35% of decks that could run it.
  • Beast Within57%$0.44
    Run in 361 of these decks (57%), 33% of decks that could run it.
  • Growth Spiral55%$0.28
    Run in 346 of these decks (55%), 17% of decks that could run it.
  • An Offer You Can't Refuse47%$3.03
    Run in 295 of these decks (47%), 34% of decks that could run it.
  • Pongify47%$2.11
    Run in 295 of these decks (47%), 12% of decks that could run it.
  • Negate46%$0.14
    Run in 292 of these decks (46%), 22% of decks that could run it.
  • Cyclonic Rift43%$30.04
    Run in 271 of these decks (43%), 27% of decks that could run it.

Sorceries8

  • Cultivate71%$0.38
    Run in 448 of these decks (71%), 37% of decks that could run it.
  • Whelming Wave71%$0.71
    Run in 447 of these decks (71%), 1% of decks that could run it.
  • Kodama's Reach64%$1.51
    Run in 407 of these decks (64%), 21% of decks that could run it.
  • Nature's Lore60%$1.07
    Run in 381 of these decks (60%), 33% of decks that could run it.
  • Rampant Growth60%$0.41
    Run in 379 of these decks (60%), 27% of decks that could run it.
  • Farseek54%$0.43
    Run in 342 of these decks (54%), 36% of decks that could run it.
  • Three Visits48%$5.60
    Run in 305 of these decks (48%), 26% of decks that could run it.
  • Irenicus's Vile Duplication44%$10.29
    Run in 275 of these decks (44%), 3% of decks that could run it.

Artifacts2

  • Sol Ring93%$1.00
    Run in 590 of these decks (93%), 88% of decks that could run it.
  • Arcane Signet81%$0.37
    Run in 513 of these decks (81%), 79% of decks that could run it.

Enchantments3

  • Elemental Bond66%$1.44
    Run in 418 of these decks (66%), 5% of decks that could run it.
  • Parallel Lives57%$28.88
    Run in 359 of these decks (57%), 6% of decks that could run it.
  • Doubling Season50%$28.36
    Run in 314 of these decks (50%), 11% of decks that could run it.

Lands9

  • Command Tower89%$0.20
    Run in 560 of these decks (89%), 91% of decks that could run it.
  • Hinterland Harbor69%$0.30
    Run in 435 of these decks (69%), 35% of decks that could run it.
  • Breeding Pool61%$9.44
    Run in 384 of these decks (61%), 49% of decks that could run it.
  • Yavimaya Coast61%$0.34
    Run in 384 of these decks (61%), 30% of decks that could run it.
  • Reliquary Tower59%$3.97
    Run in 372 of these decks (59%), 28% of decks that could run it.
  • Rejuvenating Springs56%$4.58
    Run in 357 of these decks (56%), 28% of decks that could run it.
3 more lands
  • Dreamroot Cascade55%$0.85
    Run in 349 of these decks (55%), 23% of decks that could run it.
  • Flooded Grove50%$0.29
    Run in 316 of these decks (50%), 18% of decks that could run it.
  • Simic Growth Chamber44%$0.24
    Run in 278 of these decks (44%), 14% of decks that could run it.

Cards that set Koma decks apart

These show up in Koma decks far more often than in other decks that could play them.

6 more signature cards

Koma, Cosmos Serpent combos

205 of these decks (32%) run at least one combo listed on Commander Spellbook. These are the ones they run most.

  1. Hullbreaker HorrorplusSol Ring

    Infinite mana and storm count

    10%63 decks
    Steps on Spellbook(opens in a new tab)

  2. Archetype of ImaginationplusStormtide Leviathan

    5%34 decks
    Steps on Spellbook(opens in a new tab)

  3. Basalt MonolithplusKinnan, Bonder Prodigy

    Infinite mana

    3%18 decks
    Steps on Spellbook(opens in a new tab)

  4. BiovisionaryplusRite of Replication

    Wins the game

    2%14 decks
    Steps on Spellbook(opens in a new tab)

  5. Hullbreaker HorrorplusMana VaultplusSol Ring

    Infinite mana and storm count

    2%14 decks
    Steps on Spellbook(opens in a new tab)

  6. Hullbreaker HorrorplusMana VaultplusArcane Signet

    Infinite mana and storm count

    2%13 decks
    Steps on Spellbook(opens in a new tab)

Commanders like Koma, Cosmos Serpent

Their decks lean on many of the same signature cards as Koma decks do.