Koma, Cosmos Serpent (Commander) - Optimized

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #299
275decks
As CommanderAs CardAverage DeckDecks
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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 Unagi of Kyoshi Island
6.9%inclusion4 decks58 decks
2%synergy
Wan Shi Tong, Librarian
4.9%inclusion3 decks61 decks
0%synergy
Badgermole Cub
4.9%inclusion3 decks61 decks
0%synergy
Shared Roots
3.5%inclusion2 decks57 decks
0%synergy
Agna Qel'a
1.9%inclusion1 decks53 decks
1%synergy
High Synergy Cards
Adrix and Nev, Twincasters
82%inclusion225 decks275 decks
73%synergy
Parallel Lives
74%inclusion204 decks275 decks
68%synergy
Spark Double
75%inclusion207 decks275 decks
66%synergy
Sakashima of a Thousand Faces
69%inclusion189 decks275 decks
64%synergy
Elemental Bond
68%inclusion188 decks275 decks
63%synergy
Whelming Wave
68%inclusion186 decks275 decks
56%synergy
Doubling Season
62%inclusion171 decks275 decks
53%synergy
Serpent of Yawning Depths
58%inclusion159 decks275 decks
51%synergy
Sakashima the Impostor
53%inclusion146 decks275 decks
50%synergy
Mana Drain
63%inclusion173 decks275 decks
47%synergy
Top Cards
Counterspell
76%inclusion210 decks275 decks
26%synergy
Cultivate
72%inclusion199 decks275 decks
25%synergy
Kodama's Reach
68%inclusion186 decks275 decks
31%synergy
Birds of Paradise
67%inclusion185 decks275 decks
40%synergy
Heroic Intervention
65%inclusion178 decks275 decks
35%synergy
Nature's Lore
63%inclusion174 decks275 decks
33%synergy
Beast Within
61%inclusion167 decks275 decks
11%synergy
Koma, World-Eater
59%inclusion159 decks270 decks
46%synergy
Rampant Growth
59%inclusion161 decks275 decks
18%synergy
Three Visits
58%inclusion159 decks275 decks
35%synergy
Game Changers
Cyclonic Rift
80%inclusion219 decks275 decks
54%synergy
Rhystic Study
75%inclusion206 decks275 decks
53%synergy
Fierce Guardianship
67%inclusion185 decks275 decks
50%synergy
Worldly Tutor
47%inclusion128 decks275 decks
31%synergy
Seedborn Muse
46%inclusion127 decks275 decks
30%synergy
Mystical Tutor
41%inclusion112 decks275 decks
31%synergy
Force of Will
40%inclusion109 decks275 decks
30%synergy
Consecrated Sphinx
37%inclusion102 decks275 decks
28%synergy
Ancient Tomb
33%inclusion90 decks275 decks
23%synergy
Mana Vault
21%inclusion58 decks275 decks
15%synergy
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Llanowar Elves
51%inclusion139 decks275 decks
23%synergy
Craterhoof Behemoth
49%inclusion135 decks275 decks
40%synergy
Aesi, Tyrant of Gyre Strait
48%inclusion133 decks275 decks
31%synergy
Spawning Kraken
47%inclusion128 decks275 decks
39%synergy
Junk Winder
44%inclusion122 decks275 decks
38%synergy
Elvish Mystic
43%inclusion119 decks275 decks
19%synergy
Ohran Frostfang
35%inclusion95 decks275 decks
31%synergy
Roaming Throne
33%inclusion92 decks275 decks
25%synergy
Eternal Witness
32%inclusion87 decks275 decks
11%synergy
Arixmethes, Slumbering Isle
31%inclusion85 decks275 decks
17%synergy
Fyndhorn Elves
31%inclusion85 decks275 decks
15%synergy
Tatyova, Benthic Druid
29%inclusion80 decks275 decks
-2%synergy
Sakura-Tribe Elder
28%inclusion77 decks275 decks
9%synergy
Enduring Vitality
27%inclusion74 decks273 decks
20%synergy
Murkfiend Liege
25%inclusion68 decks275 decks
10%synergy
Hullbreaker Horror
25%inclusion68 decks275 decks
7%synergy
Garruk's Packleader
23%inclusion63 decks275 decks
21%synergy
Fanatic of Rhonas
22%inclusion60 decks274 decks
16%synergy
Delighted Halfling
20%inclusion56 decks275 decks
9%synergy
Azusa, Lost but Seeking
19%inclusion53 decks275 decks
5%synergy
Archetype of Imagination
19%inclusion53 decks275 decks
15%synergy
Summon: Leviathan
19%inclusion35 decks188 decks
11%synergy
Slinn Voda, the Rising Deep
14%inclusion38 decks275 decks
7%synergy
Toski, Bearer of Secrets
13%inclusion37 decks275 decks
10%synergy
Esix, Fractal Bloom
13%inclusion35 decks275 decks
9%synergy
Kinnan, Bonder Prodigy
12%inclusion34 decks275 decks
9%synergy
Nezahal, Primal Tide
12%inclusion34 decks275 decks
1%synergy
Octomancer
12%inclusion33 decks274 decks
7%synergy
Scute Swarm
12%inclusion33 decks275 decks
-9%synergy
Saryth, the Viper's Fang
11%inclusion31 decks275 decks
10%synergy
Coiling Oracle
11%inclusion31 decks275 decks
-2%synergy
Curiosity Crafter
11%inclusion31 decks275 decks
8%synergy
Enduring Curiosity
11%inclusion29 decks273 decks
7%synergy
Uro, Titan of Nature's Wrath
11%inclusion29 decks275 decks
1%synergy
Lotus Cobra
10%inclusion28 decks275 decks
-4%synergy
Circle of Dreams Druid
10%inclusion27 decks275 decks
8%synergy
Tireless Provisioner
10%inclusion27 decks275 decks
-5%synergy
Glasspool Mimic
9.5%inclusion26 decks275 decks
5%synergy
Reclamation Sage
8.7%inclusion24 decks275 decks
-6%synergy
Vorinclex, Voice of Hunger
8.7%inclusion24 decks275 decks
6%synergy
Avenger of Zendikar
8.0%inclusion22 decks275 decks
-10%synergy
Oracle of Mul Daya
8.0%inclusion22 decks275 decks
-1%synergy
Selvala, Heart of the Wilds
8.0%inclusion22 decks275 decks
5%synergy
Xolatoyac, the Smiling Flood
7.6%inclusion21 decks275 decks
0%synergy
Arbor Elf
7.6%inclusion21 decks275 decks
1%synergy
Faerie Mastermind
7.6%inclusion21 decks275 decks
3%synergy
Dryad of the Ilysian Grove
7.6%inclusion21 decks275 decks
-3%synergy
Starwinder
7.5%inclusion10 decks134 decks
1%synergy
Hydroelectric Specimen
7.3%inclusion20 decks274 decks
1%synergy
Inga and Esika
6.9%inclusion19 decks275 decks
4%synergy
Instants
Swan Song
54%inclusion148 decks275 decks
35%synergy
Pongify
45%inclusion125 decks275 decks
21%synergy
An Offer You Can't Refuse
44%inclusion122 decks275 decks
21%synergy
Growth Spiral
43%inclusion119 decks275 decks
-1%synergy
Double Major
38%inclusion105 decks275 decks
30%synergy
Negate
36%inclusion100 decks275 decks
10%synergy
Arcane Denial
36%inclusion98 decks275 decks
13%synergy
Rapid Hybridization
33%inclusion91 decks275 decks
7%synergy
Second Harvest
32%inclusion87 decks275 decks
25%synergy
Force of Negation
31%inclusion86 decks275 decks
23%synergy
Return of the Wildspeaker
23%inclusion64 decks275 decks
13%synergy
Pact of Negation
23%inclusion62 decks275 decks
15%synergy
Sink into Stupor
18%inclusion50 decks274 decks
7%synergy
Chord of Calling
17%inclusion48 decks275 decks
10%synergy
Krosan Grip
17%inclusion47 decks275 decks
9%synergy
Brainstorm
15%inclusion42 decks275 decks
1%synergy
Reality Shift
15%inclusion42 decks275 decks
1%synergy
Nature's Claim
15%inclusion42 decks275 decks
5%synergy
Tamiyo's Safekeeping
14%inclusion38 decks275 decks
8%synergy
Voidslime
14%inclusion38 decks275 decks
9%synergy
Archdruid's Charm
13%inclusion35 decks275 decks
6%synergy
Mystic Reflection
12%inclusion33 decks275 decks
9%synergy
Strix Serenade
12%inclusion32 decks274 decks
8%synergy
Planar Genesis
12%inclusion32 decks274 decks
1%synergy
Noxious Revival
12%inclusion32 decks275 decks
6%synergy
Stubborn Denial
11%inclusion30 decks275 decks
8%synergy
Force of Vigor
11%inclusion30 decks275 decks
6%synergy
Harrow
11%inclusion30 decks275 decks
-1%synergy
Crop Rotation
11%inclusion30 decks275 decks
-2%synergy
Resculpt
9.5%inclusion26 decks275 decks
3%synergy
Simic Charm
9.1%inclusion25 decks275 decks
1%synergy
Muddle the Mixture
8.0%inclusion22 decks275 decks
4%synergy
Return to Nature
7.3%inclusion20 decks275 decks
2%synergy
Narset's Reversal
7.3%inclusion20 decks275 decks
6%synergy
Snakeskin Veil
7.3%inclusion20 decks275 decks
2%synergy
Flusterstorm
6.9%inclusion19 decks275 decks
0%synergy
Dispel
6.5%inclusion18 decks275 decks
2%synergy
Collective Resistance
6.2%inclusion17 decks274 decks
3%synergy
Disallow
6.2%inclusion17 decks275 decks
4%synergy
Legolas's Quick Reflexes
6.2%inclusion17 decks275 decks
4%synergy
Veil of Summer
6.2%inclusion17 decks275 decks
0%synergy
Eureka Moment
6.2%inclusion17 decks275 decks
-5%synergy
Tyvar's Stand
5.8%inclusion16 decks275 decks
3%synergy
Cryptic Command
5.1%inclusion14 decks275 decks
4%synergy
Decisive Denial
5.1%inclusion14 decks275 decks
0%synergy
Sublime Epiphany
5.1%inclusion14 decks275 decks
3%synergy
Entish Restoration
5.1%inclusion14 decks275 decks
-4%synergy
Sorceries
Farseek
53%inclusion146 decks275 decks
28%synergy
Irenicus's Vile Duplication
48%inclusion132 decks275 decks
42%synergy
Skyshroud Claim
42%inclusion116 decks275 decks
33%synergy
Finale of Devastation
28%inclusion76 decks275 decks
16%synergy
Quantum Misalignment
23%inclusion63 decks275 decks
20%synergy
Triumph of the Hordes
19%inclusion52 decks275 decks
16%synergy
Overwhelming Stampede
19%inclusion52 decks275 decks
7%synergy
Bala Ged Recovery
17%inclusion46 decks275 decks
7%synergy
Explore
16%inclusion43 decks275 decks
-5%synergy
Sea Gate Restoration
14%inclusion39 decks275 decks
9%synergy
Green Sun's Zenith
13%inclusion37 decks275 decks
5%synergy
Rite of Replication
13%inclusion36 decks275 decks
6%synergy
Migration Path
11%inclusion29 decks275 decks
7%synergy
Distant Melody
9.1%inclusion25 decks275 decks
6%synergy
Shamanic Revelation
8.7%inclusion24 decks275 decks
3%synergy
Ponder
8.0%inclusion22 decks275 decks
1%synergy
Explosive Vegetation
8.0%inclusion22 decks275 decks
2%synergy
Rishkar's Expertise
8.0%inclusion22 decks275 decks
0%synergy
Windfall
7.6%inclusion21 decks275 decks
4%synergy
Bridgeworks Battle
6.9%inclusion19 decks274 decks
2%synergy
Regrowth
6.9%inclusion19 decks275 decks
3%synergy
Flare of Cultivation
6.6%inclusion18 decks274 decks
5%synergy
Raise the Palisade
6.5%inclusion18 decks275 decks
0%synergy
Natural Order
6.2%inclusion17 decks275 decks
5%synergy
Urban Evolution
6.2%inclusion17 decks275 decks
-3%synergy
Time Warp
5.8%inclusion16 decks275 decks
4%synergy
Expropriate
5.8%inclusion16 decks275 decks
4%synergy
Curse of the Swine
5.5%inclusion15 decks275 decks
-5%synergy
Harmonize
5.5%inclusion15 decks275 decks
0%synergy
Doppelgang
5.5%inclusion15 decks275 decks
-1%synergy
Last March of the Ents
5.1%inclusion14 decks275 decks
1%synergy
Utility Artifacts
Lightning Greaves
50%inclusion138 decks275 decks
28%synergy
Helm of the Host
43%inclusion117 decks275 decks
37%synergy
Swiftfoot Boots
41%inclusion112 decks275 decks
15%synergy
The One Ring
20%inclusion56 decks275 decks
13%synergy
Combine Chrysalis
18%inclusion49 decks275 decks
14%synergy
The Great Henge
14%inclusion39 decks275 decks
5%synergy
Emerald Medallion
14%inclusion38 decks275 decks
11%synergy
Mirror Box
13%inclusion35 decks275 decks
9%synergy
Sapphire Medallion
11%inclusion31 decks275 decks
8%synergy
Eldrazi Monument
10%inclusion27 decks275 decks
9%synergy
Banner of Kinship
7.4%inclusion20 decks270 decks
6%synergy
Coat of Arms
6.9%inclusion19 decks275 decks
6%synergy
Skullclamp
6.9%inclusion19 decks275 decks
6%synergy
Idol of Oblivion
6.9%inclusion19 decks275 decks
3%synergy
Enchantments
Tribute to the World Tree
52%inclusion142 decks275 decks
45%synergy
Mystic Remora
48%inclusion132 decks275 decks
33%synergy
Kindred Discovery
36%inclusion99 decks275 decks
26%synergy
Sylvan Library
33%inclusion92 decks275 decks
24%synergy
Growing Rites of Itlimoc
24%inclusion67 decks275 decks
18%synergy
Exploration
21%inclusion57 decks275 decks
7%synergy
Cryptolith Rite
20%inclusion55 decks275 decks
17%synergy
Primal Vigor
17%inclusion46 decks275 decks
14%synergy
Wild Growth
16%inclusion45 decks275 decks
8%synergy
Utopia Sprawl
15%inclusion42 decks275 decks
9%synergy
Defense of the Heart
14%inclusion39 decks275 decks
12%synergy
Beastmaster Ascension
12%inclusion32 decks275 decks
9%synergy
Garruk's Uprising
11%inclusion31 decks275 decks
-5%synergy
Unnatural Growth
11%inclusion31 decks275 decks
8%synergy
Burgeoning
11%inclusion31 decks275 decks
4%synergy
Carpet of Flowers
11%inclusion29 decks275 decks
8%synergy
Paradox Haze
10%inclusion28 decks275 decks
10%synergy
Propaganda
10%inclusion28 decks275 decks
3%synergy
Kenrith's Transformation
8.7%inclusion24 decks275 decks
4%synergy
Imprisoned in the Moon
8.0%inclusion22 decks275 decks
4%synergy
Asceticism
6.5%inclusion18 decks275 decks
3%synergy
Moonlit Meditation
5.9%inclusion8 decks135 decks
5%synergy
Wilderness Reclamation
5.8%inclusion16 decks275 decks
-3%synergy
Omniscience
5.8%inclusion16 decks275 decks
1%synergy
Dismiss into Dream
5.8%inclusion16 decks275 decks
6%synergy
Opposition
5.8%inclusion16 decks275 decks
5%synergy
Planeswalkers
Oko, Thief of Crowns
37%inclusion101 decks275 decks
30%synergy
Utility Lands
Reliquary Tower
62%inclusion171 decks275 decks
12%synergy
Boseiju, Who Endures
47%inclusion130 decks275 decks
25%synergy
Otawara, Soaring City
37%inclusion101 decks275 decks
18%synergy
Yavimaya, Cradle of Growth
36%inclusion99 decks275 decks
14%synergy
Command Beacon
25%inclusion68 decks275 decks
21%synergy
Three Tree City
22%inclusion61 decks274 decks
17%synergy
Gaea's Cradle
20%inclusion56 decks275 decks
13%synergy
Mistrise Village
17%inclusion40 decks231 decks
7%synergy
Mystic Sanctuary
16%inclusion44 decks275 decks
3%synergy
Temple of the False God
16%inclusion43 decks275 decks
0%synergy
Castle Garenbrig
16%inclusion43 decks275 decks
11%synergy
Evendo, Waking Haven
15%inclusion21 decks138 decks
10%synergy
Mosswort Bridge
14%inclusion39 decks275 decks
-3%synergy
Rogue's Passage
14%inclusion38 decks275 decks
-8%synergy
Alchemist's Refuge
13%inclusion36 decks275 decks
-4%synergy
Shifting Woodland
7.7%inclusion21 decks274 decks
1%synergy
Urza's Saga
7.3%inclusion20 decks275 decks
2%synergy
Minamo, School at Water's Edge
6.9%inclusion19 decks275 decks
0%synergy
Scavenger Grounds
5.8%inclusion16 decks275 decks
2%synergy
Field of the Dead
5.8%inclusion16 decks275 decks
0%synergy
Castle Vantress
5.8%inclusion16 decks275 decks
-1%synergy
Restless Vinestalk
5.5%inclusion15 decks275 decks
0%synergy
Mana Artifacts
Sol Ring
96%inclusion263 decks275 decks
15%synergy
Arcane Signet
85%inclusion233 decks275 decks
22%synergy
Thought Vessel
44%inclusion121 decks275 decks
24%synergy
Talisman of Curiosity
37%inclusion103 decks275 decks
16%synergy
Simic Signet
34%inclusion93 decks275 decks
2%synergy
Chrome Mox
16%inclusion44 decks275 decks
9%synergy
Fellwar Stone
12%inclusion33 decks275 decks
2%synergy
Lotus Petal
11%inclusion29 decks275 decks
4%synergy
Thran Dynamo
7.3%inclusion20 decks275 decks
4%synergy
Mox Diamond
7.3%inclusion20 decks275 decks
2%synergy
Basalt Monolith
6.2%inclusion17 decks275 decks
-1%synergy
Commander's Sphere
5.5%inclusion15 decks275 decks
-3%synergy
Lands
Command Tower
93%inclusion256 decks275 decks
8%synergy
Forest
93%inclusion255 decks275 decks
-3%synergy
Island
92%inclusion254 decks275 decks
-3%synergy
Breeding Pool
79%inclusion216 decks275 decks
33%synergy
Rejuvenating Springs
73%inclusion201 decks275 decks
29%synergy
Hinterland Harbor
72%inclusion198 decks275 decks
13%synergy
Yavimaya Coast
64%inclusion175 decks275 decks
11%synergy
Misty Rainforest
59%inclusion163 decks275 decks
28%synergy
Dreamroot Cascade
57%inclusion158 decks275 decks
16%synergy
Barkchannel Pathway
53%inclusion146 decks275 decks
33%synergy
Flooded Grove
47%inclusion128 decks275 decks
6%synergy
Simic Growth Chamber
41%inclusion114 decks275 decks
-7%synergy
Waterlogged Grove
33%inclusion90 decks275 decks
12%synergy
Vineglimmer Snarl
32%inclusion89 decks275 decks
-6%synergy
Tropical Island
28%inclusion77 decks275 decks
14%synergy
Hedge Maze
28%inclusion76 decks275 decks
8%synergy
Fabled Passage
27%inclusion74 decks275 decks
12%synergy
Temple of Mystery
27%inclusion73 decks275 decks
-12%synergy
Willowrush Verge
26%inclusion70 decks268 decks
10%synergy
Exotic Orchard
23%inclusion64 decks275 decks
-1%synergy
Prismatic Vista
19%inclusion52 decks275 decks
11%synergy
Sink into Stupor
18%inclusion50 decks274 decks
7%synergy
Myriad Landscape
18%inclusion50 decks275 decks
-4%synergy
Flooded Strand
17%inclusion48 decks275 decks
6%synergy
Botanical Sanctum
17%inclusion47 decks275 decks
5%synergy
Bala Ged Recovery
17%inclusion46 decks275 decks
7%synergy
Windswept Heath
16%inclusion43 decks275 decks
5%synergy
Rimewood Falls
16%inclusion43 decks275 decks
6%synergy
Scalding Tarn
15%inclusion42 decks275 decks
5%synergy
Verdant Catacombs
15%inclusion42 decks275 decks
6%synergy
Sea Gate Restoration
14%inclusion39 decks275 decks
9%synergy
Polluted Delta
14%inclusion39 decks275 decks
4%synergy
Snow-Covered Forest
13%inclusion37 decks275 decks
7%synergy
Snow-Covered Island
13%inclusion36 decks275 decks
6%synergy
Evolving Wilds
13%inclusion36 decks275 decks
-12%synergy
Wooded Foothills
13%inclusion35 decks275 decks
3%synergy
Thornwood Falls
12%inclusion34 decks275 decks
-5%synergy
Overflowing Basin
12%inclusion33 decks274 decks
-7%synergy
Tangled Islet
11%inclusion31 decks275 decks
-5%synergy
Reflecting Pool
11%inclusion29 decks275 decks
7%synergy
Mana Confluence
11%inclusion29 decks275 decks
5%synergy
City of Brass
11%inclusion29 decks275 decks
5%synergy
Terramorphic Expanse
10%inclusion28 decks275 decks
-10%synergy
Glasspool Mimic
9.5%inclusion26 decks275 decks
5%synergy
Path of Ancestry
8.4%inclusion23 decks275 decks
-9%synergy
Gemstone Caverns
7.6%inclusion21 decks275 decks
2%synergy
Hydroelectric Specimen
7.3%inclusion20 decks274 decks
1%synergy
Bridgeworks Battle
6.9%inclusion19 decks274 decks
2%synergy
Cavern of Souls
6.5%inclusion18 decks275 decks
1%synergy
Littjara Mirrorlake
5.1%inclusion14 decks275 decks
1%synergy
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