Average Deck for Koma, Cosmos Serpent - Sea Creatures
Alternate Names:
The Monstrous SerpentThe Monstrous Serpent
Koma, Cosmos Serpent
Rank #298
147decks
Nov 13, 2025
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.
Aug 6, 2025
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
- 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 Arcane DenialArcane Denial
- 1 Arcane SignetArcane Signet
- 1 Arixmethes, Slumbering IsleArixmethes, Slumbering Isle
- 1 Barkchannel PathwayBarkchannel Pathway
- 1 Beast WithinBeast Within
- 1 Birds of ParadiseBirds of Paradise
- 1 Breeding PoolBreeding Pool
- 1 Brinelin, the Moon KrakenBrinelin, the Moon Kraken
- 1 Command TowerCommand Tower
- 1 CounterspellCounterspell
- 1 CultivateCultivate
- 1 Cyclonic RiftCyclonic Rift
- 1 Deep-Sea KrakenDeep-Sea Kraken
- 1 Double MajorDouble Major
- 1 Dreamroot CascadeDreamroot Cascade
- 1 Elemental BondElemental Bond
- 1 ExploreExplore
- 1 FarseekFarseek
- 1 Flooded GroveFlooded Grove
- 10 ForestForest
- 1 Garruk's UprisingGarruk's Uprising
- 1 Growth SpiralGrowth Spiral
- 1 Helm of the HostHelm of the Host
- 1 Heroic InterventionHeroic Intervention
- 1 Hinterland HarborHinterland Harbor
- 1 Hullbreaker HorrorHullbreaker Horror
- 1 Inkwell LeviathanInkwell Leviathan
- 1 Irenicus's Vile DuplicationIrenicus's Vile Duplication
- 10 IslandIsland
- 1 Junk WinderJunk Winder
- 1 Kefnet's MonumentKefnet's Monument
- 1 Kiora, Sovereign of the DeepKiora, Sovereign of the Deep
- 1 Kiora, the Crashing WaveKiora, the Crashing Wave
- 1 Kodama's ReachKodama's Reach
- 1 Koma, World-EaterKoma, World-Eater
- 1 Krosan GripKrosan Grip
- 1 Mosswort BridgeMosswort Bridge
- 1 Myriad LandscapeMyriad Landscape
- 1 Nadir KrakenNadir Kraken
- 1 Nature's LoreNature's Lore
- 1 NegateNegate
- 1 Nezahal, Primal TideNezahal, Primal Tide
- 1 Ominous SeasOminous Seas
- 1 Parallel LivesParallel Lives
- 1 Quest for Ula's TempleQuest for Ula's Temple
- 1 Rampant GrowthRampant Growth
- 1 Reef WormReef Worm
- 1 Rejuvenating SpringsRejuvenating Springs
- 1 Reliquary TowerReliquary Tower
- 1 Reservoir KrakenReservoir Kraken
- 1 Return of the WildspeakerReturn of the Wildspeaker
- 1 Rhystic StudyRhystic Study
- 1 Scourge of FleetsScourge of Fleets
- 1 Serpent of Yawning DepthsSerpent of Yawning Depths
- 1 Shipbreaker KrakenShipbreaker Kraken
- 1 Simic CharmSimic Charm
- 1 Simic Growth ChamberSimic Growth Chamber
- 1 Simic SignetSimic Signet
- 1 Simic Sky SwallowerSimic Sky Swallower
- 1 Slinn Voda, the Rising DeepSlinn Voda, the Rising Deep
- 1 Snow-Covered ForestSnow-Covered Forest
- 1 Snow-Covered IslandSnow-Covered Island
- 1 Sol RingSol Ring
- 1 Spawning KrakenSpawning Kraken
- 1 Stormsurge KrakenStormsurge Kraken
- 1 Stormtide LeviathanStormtide Leviathan
- 1 Summon: LeviathanSummon: Leviathan
- 1 Swiftfoot BootsSwiftfoot Boots
- 1 Sword Coast SerpentSword Coast Serpent
- 1 Temple of MysteryTemple of Mystery
- 1 Thornwood FallsThornwood Falls
- 1 Thought VesselThought Vessel
- 1 Three VisitsThree Visits
- 1 Trench BehemothTrench Behemoth
- 1 Tribute to the World TreeTribute to the World Tree
- 1 TromokratisTromokratis
- 1 Urban EvolutionUrban Evolution
- 1 Whelming WaveWhelming Wave
- 1 Xolatoyac, the Smiling FloodXolatoyac, the Smiling Flood
Adrix and Nev, Twincasters
Adrix and Nev, Twincasters
Aesi, Tyrant of Gyre Strait
Aesi, Tyrant of Gyre Strait
Arixmethes, Slumbering Isle
Arixmethes, Slumbering Isle
Birds of Paradise
Birds of Paradise
Brinelin, the Moon Kraken
Brinelin, the Moon Kraken
Deep-Sea Kraken
Deep-Sea Kraken
Hullbreaker Horror
Hullbreaker Horror
Inkwell Leviathan
Inkwell Leviathan
Junk Winder
Junk Winder
Kiora, Sovereign of the Deep
Kiora, Sovereign of the Deep
Koma, World-Eater
Koma, World-Eater
Nadir Kraken
Nadir Kraken
Nezahal, Primal Tide
Nezahal, Primal Tide
Reef Worm
Reef Worm
Reservoir Kraken
Reservoir Kraken
Scourge of Fleets
Scourge of Fleets
Serpent of Yawning Depths
Serpent of Yawning Depths
Shipbreaker Kraken
Shipbreaker Kraken
Simic Sky Swallower
Simic Sky Swallower
Slinn Voda, the Rising Deep
Slinn Voda, the Rising Deep
Spawning Kraken
Spawning Kraken
Stormsurge Kraken
Stormsurge Kraken
Stormtide Leviathan
Stormtide Leviathan
Summon: Leviathan
Summon: Leviathan
Sword Coast Serpent
Sword Coast Serpent
Trench Behemoth
Trench Behemoth
Tromokratis
Tromokratis
Xolatoyac, the Smiling Flood
Xolatoyac, the Smiling Flood
Instants (11)
Arcane Denial
Arcane Denial
Beast Within
Beast Within
Counterspell
Counterspell
Cyclonic Rift
Cyclonic Rift
Double Major
Double Major
Growth Spiral
Growth Spiral
Heroic Intervention
Heroic Intervention
Krosan Grip
Krosan Grip
Negate
Negate
Return of the Wildspeaker
Return of the Wildspeaker
Simic Charm
Simic Charm
Sorceries (10)
Cultivate
Cultivate
Explore
Explore
Farseek
Farseek
Irenicus's Vile Duplication
Irenicus's Vile Duplication
Kodama's Reach
Kodama's Reach
Nature's Lore
Nature's Lore
Rampant Growth
Rampant Growth
Three Visits
Three Visits
Urban Evolution
Urban Evolution
Whelming Wave
Whelming Wave
Artifacts (7)
Arcane Signet
Arcane Signet
Helm of the Host
Helm of the Host
Kefnet's Monument
Kefnet's Monument
Simic Signet
Simic Signet
Sol Ring
Sol Ring
Swiftfoot Boots
Swiftfoot Boots
Thought Vessel
Thought Vessel
Enchantments (7)
Elemental Bond
Elemental Bond
Garruk's Uprising
Garruk's Uprising
Ominous Seas
Ominous Seas
Parallel Lives
Parallel Lives
Quest for Ula's Temple
Quest for Ula's Temple
Rhystic Study
Rhystic Study
Tribute to the World Tree
Tribute to the World Tree
Planeswalkers (1)
Kiora, the Crashing Wave
Kiora, the Crashing Wave
Lands (13)
Barkchannel Pathway
Barkchannel Pathway
Breeding Pool
Breeding Pool
Command Tower
Command Tower
Dreamroot Cascade
Dreamroot Cascade
Flooded Grove
Flooded Grove
Hinterland Harbor
Hinterland Harbor
Mosswort Bridge
Mosswort Bridge
Myriad Landscape
Myriad Landscape
Rejuvenating Springs
Rejuvenating Springs
Reliquary Tower
Reliquary Tower
Simic Growth Chamber
Simic Growth Chamber
Temple of Mystery
Temple of Mystery
Thornwood Falls
Thornwood Falls
Basics (4)
Forest
10 Forests
Island
10 Islands
Snow-Covered Forest
1 Snow-Covered Forest
Snow-Covered Island
1 Snow-Covered Island