Koma, Cosmos Serpent (Commander) - Core Sea Creatures

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #298
3decks
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Background image for How To Play Sea Creatures Differently In Commander
Sikora
Nov 13, 2025
Sikora
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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The Terror of Serpent's Pass
33%inclusion1 decks3 decks
33%synergy
Creatures
Koma, World-Eater
100%inclusion3 decks3 decks
87%synergy
Arixmethes, Slumbering Isle
100%inclusion3 decks3 decks
87%synergy
Tatyova, Benthic Druid
67%inclusion2 decks3 decks
35%synergy
Adrix and Nev, Twincasters
67%inclusion2 decks3 decks
58%synergy
Iceridge Serpent
67%inclusion2 decks3 decks
66%synergy
Junk Winder
67%inclusion2 decks3 decks
60%synergy
Aesi, Tyrant of Gyre Strait
67%inclusion2 decks3 decks
49%synergy
Slinn Voda, the Rising Deep
67%inclusion2 decks3 decks
60%synergy
Moritte of the Frost
67%inclusion2 decks3 decks
65%synergy
Esix, Fractal Bloom
67%inclusion2 decks3 decks
63%synergy
Hullbreaker Horror
67%inclusion2 decks3 decks
49%synergy
Sakura-Tribe Elder
67%inclusion2 decks3 decks
47%synergy
Spawning Kraken
67%inclusion2 decks3 decks
59%synergy
Troyan, Gutsy Explorer
33%inclusion1 decks3 decks
30%synergy
Stormtide Leviathan
33%inclusion1 decks3 decks
27%synergy
Mulldrifter
33%inclusion1 decks3 decks
27%synergy
Xolatoyac, the Smiling Flood
33%inclusion1 decks3 decks
26%synergy
Eternal Witness
33%inclusion1 decks3 decks
12%synergy
Roaming Throne
33%inclusion1 decks3 decks
25%synergy
Waker of Waves
33%inclusion1 decks3 decks
33%synergy
Elvish Mystic
33%inclusion1 decks3 decks
9%synergy
Avenger of Zendikar
33%inclusion1 decks3 decks
15%synergy
Harbor Serpent
33%inclusion1 decks3 decks
33%synergy
Murkfiend Liege
33%inclusion1 decks3 decks
19%synergy
Steelclad Serpent
33%inclusion1 decks3 decks
33%synergy
Hydroid Krasis
33%inclusion1 decks3 decks
25%synergy
Zimone, All-Questioning
33%inclusion1 decks3 decks
32%synergy
Frilled Sea Serpent
33%inclusion1 decks3 decks
33%synergy
Scrapdiver Serpent
33%inclusion1 decks3 decks
33%synergy
Experiment One
33%inclusion1 decks3 decks
33%synergy
Progenitor Mimic
33%inclusion1 decks3 decks
29%synergy
Spark Double
33%inclusion1 decks3 decks
24%synergy
Sakashima of a Thousand Faces
33%inclusion1 decks3 decks
28%synergy
Augmenter Pugilist
33%inclusion1 decks3 decks
32%synergy
Salvage Drone
33%inclusion1 decks3 decks
33%synergy
Archetype of Imagination
33%inclusion1 decks3 decks
29%synergy
Scute Swarm
33%inclusion1 decks3 decks
12%synergy
Phase Dolphin
33%inclusion1 decks3 decks
33%synergy
Tolarian Terror
33%inclusion1 decks3 decks
33%synergy
Serpent of Yawning Depths
33%inclusion1 decks3 decks
27%synergy
Sword Coast Serpent
33%inclusion1 decks3 decks
32%synergy
Inkwell Leviathan
33%inclusion1 decks3 decks
29%synergy
Reef Worm
33%inclusion1 decks3 decks
30%synergy
Summon: Leviathan
33%inclusion1 decks3 decks
26%synergy
Sin, Unending Cataclysm
33%inclusion1 decks3 decks
30%synergy
Starwinder
33%inclusion1 decks3 decks
27%synergy
Glacier Godmaw
33%inclusion1 decks3 decks
29%synergy
Instants
Negate
67%inclusion2 decks3 decks
41%synergy
Growth Spiral
67%inclusion2 decks3 decks
22%synergy
Counterspell
67%inclusion2 decks3 decks
17%synergy
Aura Graft
33%inclusion1 decks3 decks
33%synergy
Eureka Moment
33%inclusion1 decks3 decks
22%synergy
Artisan's Sorrow
33%inclusion1 decks3 decks
33%synergy
See Double
33%inclusion1 decks3 decks
32%synergy
Heroic Intervention
33%inclusion1 decks3 decks
3%synergy
Refute
33%inclusion1 decks3 decks
31%synergy
Decisive Denial
33%inclusion1 decks3 decks
28%synergy
Incubation // Incongruity
33%inclusion1 decks3 decks
31%synergy
Brainstorm
33%inclusion1 decks3 decks
19%synergy
Krosan Grip
33%inclusion1 decks3 decks
25%synergy
Mindbreak Trap
33%inclusion1 decks3 decks
29%synergy
Mystic Reflection
33%inclusion1 decks3 decks
31%synergy
Disruption Protocol
33%inclusion1 decks3 decks
33%synergy
Sublime Epiphany
33%inclusion1 decks3 decks
31%synergy
Second Harvest
33%inclusion1 decks3 decks
27%synergy
Roiling Regrowth
33%inclusion1 decks3 decks
29%synergy
Thought Collapse
33%inclusion1 decks3 decks
33%synergy
Reality Shift
33%inclusion1 decks3 decks
19%synergy
Break Down
33%inclusion1 decks3 decks
33%synergy
Mana Drain
33%inclusion1 decks3 decks
18%synergy
Beast Within
33%inclusion1 decks3 decks
-17%synergy
Unsummon
33%inclusion1 decks3 decks
32%synergy
Saw It Coming
33%inclusion1 decks3 decks
32%synergy
Cackling Counterpart
33%inclusion1 decks3 decks
30%synergy
Joint Exploration
33%inclusion1 decks3 decks
27%synergy
Anticipate
33%inclusion1 decks3 decks
33%synergy
Whirlwind Denial
33%inclusion1 decks3 decks
33%synergy
Tamiyo's Safekeeping
33%inclusion1 decks3 decks
28%synergy
Memory Lapse
33%inclusion1 decks3 decks
32%synergy
Naturalize
33%inclusion1 decks3 decks
32%synergy
Neutralize
33%inclusion1 decks3 decks
33%synergy
Withstand Death
33%inclusion1 decks3 decks
33%synergy
Pulse of Murasa
33%inclusion1 decks3 decks
33%synergy
Double Major
33%inclusion1 decks3 decks
25%synergy
Lifestream's Blessing
33%inclusion1 decks3 decks
32%synergy
Magic Damper
33%inclusion1 decks3 decks
32%synergy
Tifa's Limit Break
33%inclusion1 decks3 decks
33%synergy
Biosynthic Burst
33%inclusion1 decks3 decks
32%synergy
Sorceries
Cultivate
100%inclusion3 decks3 decks
53%synergy
Kodama's Reach
67%inclusion2 decks3 decks
30%synergy
Rampant Growth
67%inclusion2 decks3 decks
26%synergy
Explore
67%inclusion2 decks3 decks
46%synergy
Whelming Wave
67%inclusion2 decks3 decks
55%synergy
Croaking Counterpart
33%inclusion1 decks3 decks
29%synergy
Pest Infestation
33%inclusion1 decks3 decks
32%synergy
Three Visits
33%inclusion1 decks3 decks
10%synergy
Ranger's Path
33%inclusion1 decks3 decks
33%synergy
Neoform
33%inclusion1 decks3 decks
29%synergy
Farseek
33%inclusion1 decks3 decks
9%synergy
Quasiduplicate
33%inclusion1 decks3 decks
31%synergy
Harmonize
33%inclusion1 decks3 decks
28%synergy
Broken Bond
33%inclusion1 decks3 decks
28%synergy
Spitting Image
33%inclusion1 decks3 decks
31%synergy
Irenicus's Vile Duplication
33%inclusion1 decks3 decks
27%synergy
Repudiate // Replicate
33%inclusion1 decks3 decks
31%synergy
Doppelgang
33%inclusion1 decks3 decks
27%synergy
Ezuri's Predation
33%inclusion1 decks3 decks
26%synergy
Bala Ged Recovery
33%inclusion1 decks3 decks
23%synergy
Migration Path
33%inclusion1 decks3 decks
30%synergy
Overwhelming Stampede
33%inclusion1 decks3 decks
21%synergy
Rite of Replication
33%inclusion1 decks3 decks
26%synergy
Utility Artifacts
Esika's Chariot
67%inclusion2 decks3 decks
65%synergy
Giant's Amulet
33%inclusion1 decks3 decks
33%synergy
Crucible of Worlds
33%inclusion1 decks3 decks
29%synergy
Mirror Box
33%inclusion1 decks3 decks
30%synergy
Mirror Gallery
33%inclusion1 decks3 decks
33%synergy
Helm of the Host
33%inclusion1 decks3 decks
28%synergy
Banner of Kinship
33%inclusion1 decks3 decks
31%synergy
Maskwood Nexus
33%inclusion1 decks3 decks
31%synergy
Champion's Helm
33%inclusion1 decks3 decks
33%synergy
Idol of Oblivion
33%inclusion1 decks3 decks
30%synergy
Swiftfoot Boots
33%inclusion1 decks3 decks
8%synergy
Sapphire Medallion
33%inclusion1 decks3 decks
30%synergy
The Earth Crystal
33%inclusion1 decks3 decks
29%synergy
Enchantments
Kindred Discovery
67%inclusion2 decks3 decks
57%synergy
Doubling Season
33%inclusion1 decks3 decks
24%synergy
Exploration
33%inclusion1 decks3 decks
20%synergy
Arcane Adaptation
33%inclusion1 decks3 decks
33%synergy
Garruk's Uprising
33%inclusion1 decks3 decks
17%synergy
Vesuvan Duplimancy
33%inclusion1 decks3 decks
31%synergy
Tribute to the World Tree
33%inclusion1 decks3 decks
27%synergy
Parallel Lives
33%inclusion1 decks3 decks
27%synergy
Curator's Ward
33%inclusion1 decks3 decks
33%synergy
Kasmina's Transmutation
33%inclusion1 decks3 decks
32%synergy
Reflections of Littjara
33%inclusion1 decks3 decks
26%synergy
Court of Bounty
33%inclusion1 decks3 decks
33%synergy
Awakening Zone
33%inclusion1 decks3 decks
32%synergy
Planeswalkers
Kiora, Master of the Depths
33%inclusion1 decks3 decks
31%synergy
Tamiyo, Collector of Tales
33%inclusion1 decks3 decks
32%synergy
Utility Lands
Reliquary Tower
67%inclusion2 decks3 decks
17%synergy
Temple of the False God
67%inclusion2 decks3 decks
51%synergy
Lotus Field
33%inclusion1 decks3 decks
32%synergy
Mystic Sanctuary
33%inclusion1 decks3 decks
21%synergy
Arcane Lighthouse
33%inclusion1 decks3 decks
33%synergy
Mistrise Village
33%inclusion1 decks3 decks
23%synergy
Seat of the Synod
33%inclusion1 decks3 decks
31%synergy
Vesuva
33%inclusion1 decks3 decks
28%synergy
Lonely Sandbar
33%inclusion1 decks3 decks
29%synergy
Skyline Cascade
33%inclusion1 decks3 decks
33%synergy
Command Beacon
33%inclusion1 decks3 decks
29%synergy
Yavimaya, Cradle of Growth
33%inclusion1 decks3 decks
11%synergy
Tranquil Thicket
33%inclusion1 decks3 decks
29%synergy
Castle Vantress
33%inclusion1 decks3 decks
26%synergy
Three Tree City
33%inclusion1 decks3 decks
28%synergy
Rogue's Passage
33%inclusion1 decks3 decks
11%synergy
Evendo, Waking Haven
33%inclusion1 decks3 decks
28%synergy
Mana Artifacts
Arcane Signet
67%inclusion2 decks3 decks
4%synergy
Simic Signet
67%inclusion2 decks3 decks
35%synergy
Sol Ring
67%inclusion2 decks3 decks
-14%synergy
Simic Cluestone
33%inclusion1 decks3 decks
32%synergy
Commander's Sphere
33%inclusion1 decks3 decks
25%synergy
Patchwork Banner
33%inclusion1 decks3 decks
30%synergy
Talisman of Curiosity
33%inclusion1 decks3 decks
12%synergy
Thought Vessel
33%inclusion1 decks3 decks
13%synergy
Lands
Terramorphic Expanse
100%inclusion3 decks3 decks
80%synergy
Forest
100%inclusion3 decks3 decks
5%synergy
Thornwood Falls
100%inclusion3 decks3 decks
82%synergy
Simic Growth Chamber
67%inclusion2 decks3 decks
18%synergy
Command Tower
67%inclusion2 decks3 decks
-19%synergy
Vineglimmer Snarl
67%inclusion2 decks3 decks
28%synergy
Snow-Covered Forest
67%inclusion2 decks3 decks
60%synergy
Temple of Mystery
67%inclusion2 decks3 decks
28%synergy
Evolving Wilds
67%inclusion2 decks3 decks
42%synergy
Island
67%inclusion2 decks3 decks
-29%synergy
Fabled Passage
33%inclusion1 decks3 decks
19%synergy
Quandrix Campus
33%inclusion1 decks3 decks
26%synergy
Breeding Pool
33%inclusion1 decks3 decks
-12%synergy
Myriad Landscape
33%inclusion1 decks3 decks
11%synergy
Tanglepool Bridge
33%inclusion1 decks3 decks
28%synergy
Littjara Mirrorlake
33%inclusion1 decks3 decks
29%synergy
Barkchannel Pathway
33%inclusion1 decks3 decks
13%synergy
Snow-Covered Island
33%inclusion1 decks3 decks
26%synergy
Cavern of Souls
33%inclusion1 decks3 decks
27%synergy
Rimewood Falls
33%inclusion1 decks3 decks
24%synergy
Path of Ancestry
33%inclusion1 decks3 decks
16%synergy
Lush Oasis
33%inclusion1 decks3 decks
27%synergy
Brokers Hideout
33%inclusion1 decks3 decks
28%synergy
Willowrush Verge
33%inclusion1 decks3 decks
17%synergy
Rejuvenating Springs
33%inclusion1 decks3 decks
-11%synergy
Bala Ged Recovery
33%inclusion1 decks3 decks
23%synergy
Dreamroot Cascade
33%inclusion1 decks3 decks
-9%synergy
Woodland Stream
33%inclusion1 decks3 decks
28%synergy
Simic Guildgate
33%inclusion1 decks3 decks
23%synergy
Hinterland Harbor
33%inclusion1 decks3 decks
-26%synergy
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