Average Deck for Koma, Cosmos Serpent - Expensive Sea Creatures

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent

Rank #298

14decks

As Commander As Card Average Deck Decks

Bracket

All 1 2 3 4 5

Budget

Any $$$$

How To Play Sea Creatures Differently In Commander

Sea creatures in Magic are basically as old as the game itself, but they've changed significantly in that time.

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Aug 6, 2025

Arnaud Gompertz

Can You Build Simic in Commander Without... Going Simic?

Can you go Simic without doing the Simic stuff that everyone dreads? Yes you can! Arnaud is here with some uncanny Commander deck ideas.

Average Decklist

Koma, Cosmos Serpent

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- 1 Koma, Cosmos SerpentKoma, Cosmos Serpent
- 1 Adrix and Nev, TwincastersAdrix and Nev, Twincasters
- 1 Aesi, Tyrant of Gyre StraitAesi, Tyrant of Gyre Strait
- 1 Ancient TombAncient Tomb
- 1 Arcane SignetArcane Signet
- 1 Arixmethes, Slumbering IsleArixmethes, Slumbering Isle
- 1 Bala Ged RecoveryBala Ged Recovery
- 1 Barkchannel PathwayBarkchannel Pathway
- 1 Beast WithinBeast Within
- 1 Birds of ParadiseBirds of Paradise
- 1 Boseiju, Who EnduresBoseiju, Who Endures
- 1 Breaching LeviathanBreaching Leviathan
- 1 Breeding PoolBreeding Pool
- 1 Brinelin, the Moon KrakenBrinelin, the Moon Kraken
- 1 Chameleon, Master of DisguiseChameleon, Master of Disguise
- 1 Command TowerCommand Tower
- 1 CounterspellCounterspell
- 1 Craterhoof BehemothCraterhoof Behemoth
- 1 Cryptic SerpentCryptic Serpent
- 1 CultivateCultivate
- 1 Cyclonic RiftCyclonic Rift
- 1 Doubling SeasonDoubling Season
- 1 Dreamroot CascadeDreamroot Cascade
- 1 Elemental BondElemental Bond
- 1 Evendo, Waking HavenEvendo, Waking Haven
- 1 ExplorationExploration
- 1 FarseekFarseek
- 1 Fierce GuardianshipFierce Guardianship
- 1 Flooded GroveFlooded Grove
- 1 Force of WillForce of Will
- 6 ForestForest
- 1 Growth SpiralGrowth Spiral
- 1 Harbor SerpentHarbor Serpent
- 1 Heroic InterventionHeroic Intervention
- 1 Hinterland HarborHinterland Harbor
- 1 Hullbreaker HorrorHullbreaker Horror
- 1 Irenicus's Vile DuplicationIrenicus's Vile Duplication
- 6 IslandIsland
- 1 Junk WinderJunk Winder
- 1 Kefnet's MonumentKefnet's Monument
- 1 Kindred DiscoveryKindred Discovery
- 1 Kiora, Sovereign of the DeepKiora, Sovereign of the Deep
- 1 Kodama's ReachKodama's Reach
- 1 Koma, World-EaterKoma, World-Eater
- 1 Lightning GreavesLightning Greaves
- 1 Mana DrainMana Drain
- 1 Misty RainforestMisty Rainforest
- 1 Nadir KrakenNadir Kraken
- 1 Nature's ClaimNature's Claim
- 1 Nature's LoreNature's Lore
- 1 Nezahal, Primal TideNezahal, Primal Tide
- 1 OctomancerOctomancer
- 1 Otawara, Soaring CityOtawara, Soaring City
- 1 Pact of NegationPact of Negation
- 1 Parallel LivesParallel Lives
- 1 Quest for Ula's TempleQuest for Ula's Temple
- 1 Rampant GrowthRampant Growth
- 1 Rejuvenating SpringsRejuvenating Springs
- 1 Reliquary TowerReliquary Tower
- 1 Reservoir KrakenReservoir Kraken
- 1 Rhystic StudyRhystic Study
- 1 Sakashima of a Thousand FacesSakashima of a Thousand Faces
- 1 Sakashima the ImpostorSakashima the Impostor
- 1 Sapphire MedallionSapphire Medallion
- 1 Scourge of FleetsScourge of Fleets
- 1 Serpent of Yawning DepthsSerpent of Yawning Depths
- 1 Shared RootsShared Roots
- 1 Simic CharmSimic Charm
- 1 Simic Growth ChamberSimic Growth Chamber
- 1 Sink into StuporSink into Stupor
- 1 Skyshroud ClaimSkyshroud Claim
- 1 Slinn Voda, the Rising DeepSlinn Voda, the Rising Deep
- 2 Snow-Covered ForestSnow-Covered Forest
- 2 Snow-Covered IslandSnow-Covered Island
- 1 Sol RingSol Ring
- 1 Spark DoubleSpark Double
- 1 Spawning KrakenSpawning Kraken
- 1 Stormsurge KrakenStormsurge Kraken
- 1 Stormtide LeviathanStormtide Leviathan
- 1 The Great HengeThe Great Henge
- 1 Three VisitsThree Visits
- 1 Tribute to the World TreeTribute to the World Tree
- 1 TromokratisTromokratis
- 1 Tropical IslandTropical Island
- 1 Urza's IncubatorUrza's Incubator
- 1 Whelming WaveWhelming Wave
- 1 Willowrush VergeWillowrush Verge
- 1 Yavimaya, Cradle of GrowthYavimaya, Cradle of Growth

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Filters Card Filters

Adrix and Nev, Twincasters

Aesi, Tyrant of Gyre Strait

Arixmethes, Slumbering Isle

Birds of Paradise

Breaching Leviathan

Brinelin, the Moon Kraken

Chameleon, Master of Disguise

Craterhoof Behemoth

Cryptic Serpent

Harbor Serpent

Hullbreaker Horror

Junk Winder

Kiora, Sovereign of the Deep

Koma, World-Eater

Nadir Kraken

Nezahal, Primal Tide

Octomancer

Reservoir Kraken

Sakashima of a Thousand Faces

Sakashima the Impostor

Scourge of Fleets

Serpent of Yawning Depths

Slinn Voda, the Rising Deep

Spark Double

Spawning Kraken

Stormsurge Kraken

Stormtide Leviathan

Tromokratis

Instants (12)

Beast Within

Counterspell

Cyclonic Rift

Fierce Guardianship

Force of Will

Growth Spiral

Heroic Intervention

Mana Drain

Nature's Claim

Pact of Negation

Simic Charm

Sink into Stupor

Sorceries (11)

Bala Ged Recovery

Cultivate

Farseek

Irenicus's Vile Duplication

Kodama's Reach

Nature's Lore

Rampant Growth

Shared Roots

Skyshroud Claim

Three Visits

Whelming Wave

Artifacts (7)

Arcane Signet

Kefnet's Monument

Lightning Greaves

Sapphire Medallion

Sol Ring

The Great Henge

Urza's Incubator

Enchantments (8)

Doubling Season

Elemental Bond

Exploration

Kindred Discovery

Parallel Lives

Quest for Ula's Temple

Rhystic Study

Tribute to the World Tree

Lands (17)

Ancient Tomb

Barkchannel Pathway

Boseiju, Who Endures

Breeding Pool

Command Tower

Dreamroot Cascade

Evendo, Waking Haven

Flooded Grove

Hinterland Harbor

Misty Rainforest

Otawara, Soaring City

Rejuvenating Springs

Reliquary Tower

Simic Growth Chamber

Tropical Island

Willowrush Verge

Yavimaya, Cradle of Growth

Basics (4)

Forest

6 Forests

Island

6 Islands

Snow-Covered Forest

2 Snow-Covered Forests

Snow-Covered Island

2 Snow-Covered Islands