Koma, Cosmos Serpent (Commander) - Expensive Optimized

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #306
28decks
As CommanderAs CardAverage DeckDecks
Bracket
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Budget
Any$$$$
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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Badgermole Cub
40%inclusion2 decks5 decks
35%synergy
Wan Shi Tong, Librarian
20%inclusion1 decks5 decks
15%synergy
The Unagi of Kyoshi Island
20%inclusion1 decks5 decks
15%synergy
The Cabbage Merchant
9.1%inclusion1 decks11 decks
7%synergy
High Synergy Cards
Parallel Lives
82%inclusion23 decks28 decks
76%synergy
Adrix and Nev, Twincasters
75%inclusion21 decks28 decks
67%synergy
Mana Drain
82%inclusion23 decks28 decks
66%synergy
Sakashima of a Thousand Faces
71%inclusion20 decks28 decks
66%synergy
Elemental Bond
71%inclusion20 decks28 decks
66%synergy
Sakashima the Impostor
64%inclusion18 decks28 decks
62%synergy
Tribute to the World Tree
68%inclusion19 decks28 decks
62%synergy
Birds of Paradise
89%inclusion25 decks28 decks
61%synergy
Force of Negation
68%inclusion19 decks28 decks
59%synergy
Sylvan Library
68%inclusion19 decks28 decks
59%synergy
Top Cards
Mystic Remora
71%inclusion20 decks28 decks
56%synergy
Spark Double
68%inclusion19 decks28 decks
58%synergy
Counterspell
68%inclusion19 decks28 decks
18%synergy
Doubling Season
64%inclusion18 decks28 decks
55%synergy
Three Visits
64%inclusion18 decks28 decks
41%synergy
Heroic Intervention
64%inclusion18 decks28 decks
34%synergy
Nature's Lore
64%inclusion18 decks28 decks
34%synergy
Craterhoof Behemoth
64%inclusion18 decks28 decks
55%synergy
Consecrated Sphinx
61%inclusion17 decks28 decks
52%synergy
Beast Within
61%inclusion17 decks28 decks
11%synergy
Game Changers
Rhystic Study
96%inclusion27 decks28 decks
75%synergy
Gaea's Cradle
96%inclusion27 decks28 decks
89%synergy
Cyclonic Rift
93%inclusion26 decks28 decks
67%synergy
Fierce Guardianship
86%inclusion24 decks28 decks
68%synergy
Force of Will
86%inclusion24 decks28 decks
76%synergy
Ancient Tomb
82%inclusion23 decks28 decks
73%synergy
Worldly Tutor
75%inclusion21 decks28 decks
60%synergy
Chrome Mox
71%inclusion20 decks28 decks
65%synergy
The One Ring
64%inclusion18 decks28 decks
57%synergy
Mana Vault
64%inclusion18 decks28 decks
58%synergy
Creatures
Koma, World-Eater
56%inclusion15 decks27 decks
42%synergy
Llanowar Elves
54%inclusion15 decks28 decks
26%synergy
Elvish Mystic
54%inclusion15 decks28 decks
30%synergy
Delighted Halfling
54%inclusion15 decks28 decks
42%synergy
Serpent of Yawning Depths
54%inclusion15 decks28 decks
47%synergy
Aesi, Tyrant of Gyre Strait
50%inclusion14 decks28 decks
33%synergy
Enduring Vitality
46%inclusion13 decks28 decks
39%synergy
Roaming Throne
46%inclusion13 decks28 decks
38%synergy
Seedborn Muse
46%inclusion13 decks28 decks
31%synergy
Spawning Kraken
46%inclusion13 decks28 decks
39%synergy
Fyndhorn Elves
43%inclusion12 decks28 decks
27%synergy
Junk Winder
39%inclusion11 decks28 decks
33%synergy
Fanatic of Rhonas
29%inclusion8 decks28 decks
23%synergy
Kinnan, Bonder Prodigy
29%inclusion8 decks28 decks
25%synergy
Hullbreaker Horror
29%inclusion8 decks28 decks
11%synergy
Garruk's Packleader
25%inclusion7 decks28 decks
23%synergy
Azusa, Lost but Seeking
25%inclusion7 decks28 decks
11%synergy
Chameleon, Master of Disguise
22%inclusion2 decks9 decks
20%synergy
Bloom Tender
21%inclusion6 decks28 decks
17%synergy
Arixmethes, Slumbering Isle
21%inclusion6 decks28 decks
8%synergy
Circle of Dreams Druid
18%inclusion5 decks28 decks
16%synergy
Thrasios, Triton Hero
18%inclusion5 decks28 decks
10%synergy
Eternal Witness
18%inclusion5 decks28 decks
-3%synergy
Vorinclex, Voice of Hunger
18%inclusion5 decks28 decks
15%synergy
Ledger Shredder
18%inclusion5 decks28 decks
16%synergy
Tatyova, Benthic Druid
14%inclusion4 decks28 decks
-17%synergy
Arbor Elf
14%inclusion4 decks28 decks
8%synergy
Faerie Mastermind
14%inclusion4 decks28 decks
10%synergy
Scute Swarm
14%inclusion4 decks28 decks
-7%synergy
Ohran Frostfang
14%inclusion4 decks28 decks
11%synergy
Elvish Spirit Guide
14%inclusion4 decks28 decks
9%synergy
Lotus Cobra
14%inclusion4 decks28 decks
1%synergy
Spellskite
14%inclusion4 decks28 decks
9%synergy
Selvala, Heart of the Wilds
11%inclusion3 decks28 decks
8%synergy
Pollywog Prodigy
11%inclusion3 decks28 decks
4%synergy
Archetype of Imagination
11%inclusion3 decks28 decks
6%synergy
Toski, Bearer of Secrets
11%inclusion3 decks28 decks
7%synergy
Dryad of the Ilysian Grove
11%inclusion3 decks28 decks
0%synergy
Nezahal, Primal Tide
11%inclusion3 decks28 decks
0%synergy
Starwinder
8.3%inclusion1 decks12 decks
2%synergy
Gene Pollinator
8.3%inclusion1 decks12 decks
8%synergy
Icetill Explorer
8.3%inclusion1 decks12 decks
3%synergy
Frenzied Baloth
8.3%inclusion1 decks12 decks
7%synergy
High Fae Trickster
7.4%inclusion2 decks27 decks
4%synergy
Troyan, Gutsy Explorer
7.1%inclusion2 decks28 decks
4%synergy
Stormtide Leviathan
7.1%inclusion2 decks28 decks
1%synergy
Octomancer
7.1%inclusion2 decks28 decks
2%synergy
Xolatoyac, the Smiling Flood
7.1%inclusion2 decks28 decks
0%synergy
Inga and Esika
7.1%inclusion2 decks28 decks
4%synergy
Priest of Titania
7.1%inclusion2 decks28 decks
2%synergy
Instants
Swan Song
61%inclusion17 decks28 decks
41%synergy
Mystical Tutor
57%inclusion16 decks28 decks
48%synergy
An Offer You Can't Refuse
50%inclusion14 decks28 decks
26%synergy
Pongify
43%inclusion12 decks28 decks
18%synergy
Crop Rotation
43%inclusion12 decks28 decks
30%synergy
Arcane Denial
39%inclusion11 decks28 decks
17%synergy
Double Major
29%inclusion8 decks28 decks
20%synergy
Pact of Negation
29%inclusion8 decks28 decks
21%synergy
Rapid Hybridization
25%inclusion7 decks28 decks
-1%synergy
Archdruid's Charm
25%inclusion7 decks28 decks
19%synergy
Sink into Stupor
25%inclusion7 decks28 decks
13%synergy
Force of Vigor
25%inclusion7 decks28 decks
20%synergy
Negate
21%inclusion6 decks28 decks
-5%synergy
Growth Spiral
21%inclusion6 decks28 decks
-23%synergy
Krosan Grip
21%inclusion6 decks28 decks
14%synergy
Second Harvest
21%inclusion6 decks28 decks
15%synergy
Flusterstorm
21%inclusion6 decks28 decks
15%synergy
Return of the Wildspeaker
18%inclusion5 decks28 decks
8%synergy
Mindbreak Trap
18%inclusion5 decks28 decks
13%synergy
Mental Misstep
14%inclusion4 decks28 decks
9%synergy
Brainstorm
14%inclusion4 decks28 decks
0%synergy
Voidslime
14%inclusion4 decks28 decks
9%synergy
Muddle the Mixture
11%inclusion3 decks28 decks
6%synergy
Legolas's Quick Reflexes
11%inclusion3 decks28 decks
8%synergy
Chord of Calling
11%inclusion3 decks28 decks
3%synergy
Dispel
11%inclusion3 decks28 decks
6%synergy
Resculpt
11%inclusion3 decks28 decks
5%synergy
Noxious Revival
11%inclusion3 decks28 decks
5%synergy
Veil of Summer
7.1%inclusion2 decks28 decks
1%synergy
Stubborn Denial
7.1%inclusion2 decks28 decks
4%synergy
Nature's Claim
7.1%inclusion2 decks28 decks
-3%synergy
Harrow
7.1%inclusion2 decks28 decks
-5%synergy
Reality Shift
7.1%inclusion2 decks28 decks
-7%synergy
Keep Watch
7.1%inclusion2 decks28 decks
7%synergy
Plasm Capture
7.1%inclusion2 decks28 decks
4%synergy
Collective Resistance
7.1%inclusion2 decks28 decks
4%synergy
Dramatic Reversal
7.1%inclusion2 decks28 decks
3%synergy
Abjure
7.1%inclusion2 decks28 decks
6%synergy
Strix Serenade
7.1%inclusion2 decks28 decks
3%synergy
Stifle
7.1%inclusion2 decks28 decks
7%synergy
Miscast
7.1%inclusion2 decks28 decks
5%synergy
Sorceries
Cultivate
54%inclusion15 decks28 decks
7%synergy
Irenicus's Vile Duplication
50%inclusion14 decks28 decks
44%synergy
Farseek
50%inclusion14 decks28 decks
25%synergy
Finale of Devastation
50%inclusion14 decks28 decks
38%synergy
Whelming Wave
46%inclusion13 decks28 decks
35%synergy
Kodama's Reach
43%inclusion12 decks28 decks
7%synergy
Rampant Growth
39%inclusion11 decks28 decks
-1%synergy
Skyshroud Claim
36%inclusion10 decks28 decks
27%synergy
Green Sun's Zenith
32%inclusion9 decks28 decks
23%synergy
Sea Gate Restoration
25%inclusion7 decks28 decks
20%synergy
Explore
21%inclusion6 decks28 decks
1%synergy
Quantum Misalignment
18%inclusion5 decks28 decks
15%synergy
Natural Order
18%inclusion5 decks28 decks
16%synergy
Sylvan Tutor
18%inclusion5 decks28 decks
16%synergy
Triumph of the Hordes
14%inclusion4 decks28 decks
11%synergy
Overwhelming Stampede
14%inclusion4 decks28 decks
2%synergy
Fabricate
11%inclusion3 decks28 decks
4%synergy
Bala Ged Recovery
11%inclusion3 decks28 decks
1%synergy
Doppelgang
11%inclusion3 decks28 decks
4%synergy
Lórien Revealed
11%inclusion3 decks28 decks
8%synergy
Migration Path
11%inclusion3 decks28 decks
7%synergy
Raise the Palisade
11%inclusion3 decks28 decks
4%synergy
Windfall
7.1%inclusion2 decks28 decks
3%synergy
Last March of the Ents
7.1%inclusion2 decks28 decks
3%synergy
Turntimber Symbiosis
7.1%inclusion2 decks28 decks
5%synergy
Personal Tutor
7.1%inclusion2 decks28 decks
6%synergy
Nanogene Conversion
7.1%inclusion2 decks28 decks
6%synergy
Time Spiral
7.1%inclusion2 decks28 decks
7%synergy
Urban Evolution
7.1%inclusion2 decks28 decks
-2%synergy
Ezuri's Predation
7.1%inclusion2 decks28 decks
0%synergy
Utility Artifacts
Helm of the Host
50%inclusion14 decks28 decks
45%synergy
Lightning Greaves
43%inclusion12 decks28 decks
21%synergy
The Great Henge
25%inclusion7 decks28 decks
16%synergy
Static Orb
14%inclusion4 decks28 decks
14%synergy
Sensei's Divining Top
14%inclusion4 decks28 decks
11%synergy
Winter Orb
14%inclusion4 decks28 decks
14%synergy
Swiftfoot Boots
14%inclusion4 decks28 decks
-11%synergy
Combine Chrysalis
11%inclusion3 decks28 decks
6%synergy
Eldrazi Monument
11%inclusion3 decks28 decks
10%synergy
Isochron Scepter
11%inclusion3 decks28 decks
8%synergy
Skullclamp
7.1%inclusion2 decks28 decks
6%synergy
Whispersilk Cloak
7.1%inclusion2 decks28 decks
5%synergy
Phyrexian Altar
7.1%inclusion2 decks28 decks
7%synergy
Enchantments
Kindred Discovery
29%inclusion8 decks28 decks
19%synergy
Cryptolith Rite
29%inclusion8 decks28 decks
25%synergy
Utopia Sprawl
25%inclusion7 decks28 decks
18%synergy
Exploration
25%inclusion7 decks28 decks
12%synergy
Wild Growth
21%inclusion6 decks28 decks
13%synergy
Burgeoning
21%inclusion6 decks28 decks
14%synergy
Carpet of Flowers
14%inclusion4 decks28 decks
12%synergy
Growing Rites of Itlimoc
14%inclusion4 decks28 decks
8%synergy
Propaganda
11%inclusion3 decks28 decks
4%synergy
Defense of the Heart
11%inclusion3 decks28 decks
8%synergy
Impostor Syndrome
10%inclusion1 decks10 decks
8%synergy
Imprisoned in the Moon
7.1%inclusion2 decks28 decks
3%synergy
Earthcraft
7.1%inclusion2 decks28 decks
7%synergy
Unnatural Growth
7.1%inclusion2 decks28 decks
4%synergy
Kenrith's Transformation
7.1%inclusion2 decks28 decks
3%synergy
Stasis
7.1%inclusion2 decks28 decks
7%synergy
Opposition
7.1%inclusion2 decks28 decks
7%synergy
Pattern of Rebirth
7.1%inclusion2 decks28 decks
7%synergy
Planeswalkers
Oko, Thief of Crowns
29%inclusion8 decks28 decks
22%synergy
Utility Lands
Boseiju, Who Endures
75%inclusion21 decks28 decks
53%synergy
Otawara, Soaring City
71%inclusion20 decks28 decks
52%synergy
Yavimaya, Cradle of Growth
61%inclusion17 decks28 decks
39%synergy
Reliquary Tower
57%inclusion16 decks28 decks
7%synergy
Three Tree City
43%inclusion12 decks28 decks
38%synergy
Command Beacon
36%inclusion10 decks28 decks
32%synergy
Evendo, Waking Haven
25%inclusion3 decks12 decks
20%synergy
Wasteland
21%inclusion6 decks28 decks
20%synergy
Urza's Saga
21%inclusion6 decks28 decks
16%synergy
Strip Mine
21%inclusion6 decks28 decks
18%synergy
Mistrise Village
20%inclusion5 decks25 decks
9%synergy
Alchemist's Refuge
18%inclusion5 decks28 decks
1%synergy
Shifting Woodland
18%inclusion5 decks28 decks
11%synergy
Castle Garenbrig
18%inclusion5 decks28 decks
13%synergy
Minamo, School at Water's Edge
14%inclusion4 decks28 decks
8%synergy
Field of the Dead
14%inclusion4 decks28 decks
8%synergy
Dryad Arbor
14%inclusion4 decks28 decks
9%synergy
Rogue's Passage
14%inclusion4 decks28 decks
-8%synergy
Mystic Sanctuary
11%inclusion3 decks28 decks
-2%synergy
Yavimaya Hollow
11%inclusion3 decks28 decks
10%synergy
Maze of Ith
7.1%inclusion2 decks28 decks
4%synergy
Scavenger Grounds
7.1%inclusion2 decks28 decks
3%synergy
Nykthos, Shrine to Nyx
7.1%inclusion2 decks28 decks
4%synergy
Mosswort Bridge
7.1%inclusion2 decks28 decks
-10%synergy
Mana Artifacts
Sol Ring
100%inclusion28 decks28 decks
19%synergy
Arcane Signet
89%inclusion25 decks28 decks
26%synergy
Mox Diamond
54%inclusion15 decks28 decks
48%synergy
Talisman of Curiosity
50%inclusion14 decks28 decks
28%synergy
Lotus Petal
46%inclusion13 decks28 decks
39%synergy
Thought Vessel
39%inclusion11 decks28 decks
19%synergy
Grim Monolith
25%inclusion7 decks28 decks
22%synergy
Simic Signet
21%inclusion6 decks28 decks
-10%synergy
Fellwar Stone
21%inclusion6 decks28 decks
12%synergy
Basalt Monolith
11%inclusion3 decks28 decks
4%synergy
Mox Opal
11%inclusion3 decks28 decks
6%synergy
Mox Amber
7.1%inclusion2 decks28 decks
1%synergy
Decanter of Endless Water
7.1%inclusion2 decks28 decks
2%synergy
Lands
Command Tower
100%inclusion28 decks28 decks
15%synergy
Island
96%inclusion27 decks28 decks
1%synergy
Forest
96%inclusion27 decks28 decks
1%synergy
Breeding Pool
93%inclusion26 decks28 decks
47%synergy
Tropical Island
93%inclusion26 decks28 decks
78%synergy
Misty Rainforest
86%inclusion24 decks28 decks
54%synergy
Rejuvenating Springs
86%inclusion24 decks28 decks
42%synergy
Yavimaya Coast
64%inclusion18 decks28 decks
12%synergy
Windswept Heath
57%inclusion16 decks28 decks
47%synergy
Barkchannel Pathway
57%inclusion16 decks28 decks
37%synergy
Flooded Strand
54%inclusion15 decks28 decks
42%synergy
Hinterland Harbor
54%inclusion15 decks28 decks
-6%synergy
Wooded Foothills
50%inclusion14 decks28 decks
40%synergy
Prismatic Vista
46%inclusion13 decks28 decks
39%synergy
Verdant Catacombs
46%inclusion13 decks28 decks
37%synergy
Mana Confluence
46%inclusion13 decks28 decks
41%synergy
Dreamroot Cascade
46%inclusion13 decks28 decks
4%synergy
Polluted Delta
46%inclusion13 decks28 decks
36%synergy
Hedge Maze
43%inclusion12 decks28 decks
23%synergy
Waterlogged Grove
43%inclusion12 decks28 decks
22%synergy
Scalding Tarn
43%inclusion12 decks28 decks
33%synergy
City of Brass
39%inclusion11 decks28 decks
33%synergy
Gemstone Caverns
32%inclusion9 decks28 decks
26%synergy
Flooded Grove
32%inclusion9 decks28 decks
-9%synergy
Sink into Stupor
25%inclusion7 decks28 decks
13%synergy
Sea Gate Restoration
25%inclusion7 decks28 decks
20%synergy
Simic Growth Chamber
21%inclusion6 decks28 decks
-27%synergy
Fabled Passage
21%inclusion6 decks28 decks
7%synergy
Exotic Orchard
21%inclusion6 decks28 decks
-2%synergy
Vineglimmer Snarl
18%inclusion5 decks28 decks
-21%synergy
Willowrush Verge
15%inclusion4 decks27 decks
-2%synergy
Reflecting Pool
14%inclusion4 decks28 decks
11%synergy
Terramorphic Expanse
11%inclusion3 decks28 decks
-9%synergy
Talon Gates of Madara
11%inclusion3 decks28 decks
3%synergy
Evolving Wilds
11%inclusion3 decks28 decks
-14%synergy
Bala Ged Recovery
11%inclusion3 decks28 decks
1%synergy
Turntimber Symbiosis
7.1%inclusion2 decks28 decks
5%synergy
Snow-Covered Forest
7.1%inclusion2 decks28 decks
0%synergy
Temple of Mystery
7.1%inclusion2 decks28 decks
-31%synergy
Snow-Covered Island
7.1%inclusion2 decks28 decks
0%synergy
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