Koma, Cosmos Serpent (Commander) - Control

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #308
164decks
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
22%inclusion11 decks51 decks
16%synergy
Tam, Mindful First-Year
14%inclusion2 decks14 decks
13%synergy
Loch Mare
7.1%inclusion1 decks14 decks
7%synergy
Sodden Verdure
6.7%inclusion1 decks15 decks
2%synergy
Mirrormind Crown
6.3%inclusion1 decks16 decks
6%synergy
High Synergy Cards
Elemental Bond
80%inclusion131 decks164 decks
74%synergy
Adrix and Nev, Twincasters
79%inclusion129 decks164 decks
70%synergy
Whelming Wave
76%inclusion125 decks164 decks
65%synergy
Spark Double
73%inclusion119 decks164 decks
63%synergy
Sakashima of a Thousand Faces
61%inclusion100 decks164 decks
56%synergy
Parallel Lives
60%inclusion99 decks164 decks
54%synergy
Serpent of Yawning Depths
53%inclusion87 decks164 decks
47%synergy
Junk Winder
52%inclusion86 decks164 decks
46%synergy
Irenicus's Vile Duplication
51%inclusion84 decks164 decks
45%synergy
Tribute to the World Tree
50%inclusion82 decks164 decks
44%synergy
Top Cards
Cultivate
76%inclusion124 decks164 decks
29%synergy
Counterspell
73%inclusion120 decks164 decks
23%synergy
Nature's Lore
67%inclusion110 decks164 decks
37%synergy
Kodama's Reach
65%inclusion106 decks164 decks
29%synergy
Beast Within
63%inclusion103 decks164 decks
13%synergy
Rampant Growth
62%inclusion102 decks164 decks
22%synergy
Three Visits
60%inclusion99 decks164 decks
37%synergy
Heroic Intervention
60%inclusion98 decks164 decks
29%synergy
Koma, World-Eater
54%inclusion73 decks136 decks
40%synergy
An Offer You Can't Refuse
54%inclusion88 decks164 decks
30%synergy
Game Changers
Cyclonic Rift
63%inclusion103 decks164 decks
37%synergy
Rhystic Study
55%inclusion90 decks164 decks
33%synergy
Fierce Guardianship
49%inclusion81 decks164 decks
32%synergy
Seedborn Muse
35%inclusion58 decks164 decks
20%synergy
Consecrated Sphinx
29%inclusion48 decks164 decks
21%synergy
Force of Will
27%inclusion44 decks164 decks
17%synergy
Mystical Tutor
25%inclusion41 decks164 decks
16%synergy
Worldly Tutor
24%inclusion40 decks164 decks
9%synergy
Ancient Tomb
23%inclusion38 decks164 decks
14%synergy
Mana Vault
15%inclusion25 decks164 decks
9%synergy
Creatures
Birds of Paradise
52%inclusion86 decks164 decks
25%synergy
Aesi, Tyrant of Gyre Strait
51%inclusion84 decks164 decks
34%synergy
Sakashima the Impostor
43%inclusion70 decks164 decks
40%synergy
Spawning Kraken
42%inclusion69 decks164 decks
35%synergy
Elvish Mystic
40%inclusion65 decks164 decks
16%synergy
Llanowar Elves
39%inclusion64 decks164 decks
11%synergy
Sakura-Tribe Elder
37%inclusion61 decks164 decks
18%synergy
Craterhoof Behemoth
34%inclusion56 decks164 decks
25%synergy
Eternal Witness
32%inclusion53 decks164 decks
11%synergy
Roaming Throne
32%inclusion53 decks164 decks
24%synergy
Fyndhorn Elves
32%inclusion53 decks164 decks
17%synergy
Tatyova, Benthic Druid
32%inclusion52 decks164 decks
1%synergy
Hullbreaker Horror
32%inclusion52 decks164 decks
14%synergy
Arixmethes, Slumbering Isle
31%inclusion51 decks164 decks
18%synergy
Summon: Leviathan
29%inclusion28 decks97 decks
22%synergy
Garruk's Packleader
27%inclusion44 decks164 decks
25%synergy
Enduring Vitality
23%inclusion34 decks145 decks
16%synergy
Murkfiend Liege
22%inclusion36 decks164 decks
7%synergy
Octomancer
20%inclusion30 decks148 decks
15%synergy
Ohran Frostfang
20%inclusion33 decks164 decks
16%synergy
Delighted Halfling
20%inclusion33 decks164 decks
9%synergy
Archetype of Imagination
18%inclusion30 decks164 decks
14%synergy
Starwinder
18%inclusion14 decks79 decks
11%synergy
Uro, Titan of Nature's Wrath
18%inclusion29 decks164 decks
8%synergy
Fanatic of Rhonas
15%inclusion23 decks149 decks
10%synergy
Slinn Voda, the Rising Deep
14%inclusion23 decks164 decks
8%synergy
Enduring Curiosity
14%inclusion20 decks145 decks
11%synergy
Chameleon, Master of Disguise
13%inclusion9 decks67 decks
11%synergy
Saryth, the Viper's Fang
13%inclusion21 decks164 decks
11%synergy
Esix, Fractal Bloom
13%inclusion21 decks164 decks
9%synergy
Toski, Bearer of Secrets
12%inclusion20 decks164 decks
9%synergy
Coiling Oracle
12%inclusion19 decks164 decks
-2%synergy
Glasspool Mimic
12%inclusion19 decks164 decks
7%synergy
Azusa, Lost but Seeking
11%inclusion18 decks164 decks
-3%synergy
Lotus Cobra
11%inclusion18 decks164 decks
-3%synergy
Gala Greeters
11%inclusion18 decks164 decks
9%synergy
Hydroelectric Specimen
11%inclusion16 decks149 decks
5%synergy
Scourge of Fleets
10%inclusion17 decks164 decks
2%synergy
Tireless Provisioner
10%inclusion17 decks164 decks
-5%synergy
Nezahal, Primal Tide
10%inclusion17 decks164 decks
0%synergy
Disciple of Freyalise
9.4%inclusion14 decks149 decks
5%synergy
Curiosity Crafter
9.1%inclusion15 decks164 decks
6%synergy
Troyan, Gutsy Explorer
8.5%inclusion14 decks164 decks
5%synergy
Kinnan, Bonder Prodigy
8.5%inclusion14 decks164 decks
5%synergy
Guardian Augmenter
8.5%inclusion14 decks164 decks
7%synergy
Stormtide Leviathan
8.5%inclusion14 decks164 decks
3%synergy
Sphinx of the Second Sun
7.9%inclusion13 decks164 decks
7%synergy
Scute Swarm
7.9%inclusion13 decks164 decks
-13%synergy
Reclamation Sage
7.3%inclusion12 decks164 decks
-7%synergy
Arbor Elf
7.3%inclusion12 decks164 decks
1%synergy
Instants
Mana Drain
52%inclusion86 decks164 decks
37%synergy
Arcane Denial
45%inclusion74 decks164 decks
23%synergy
Swan Song
45%inclusion73 decks164 decks
25%synergy
Rapid Hybridization
43%inclusion70 decks164 decks
16%synergy
Growth Spiral
43%inclusion70 decks164 decks
-2%synergy
Pongify
42%inclusion69 decks164 decks
17%synergy
Negate
39%inclusion64 decks164 decks
13%synergy
Double Major
34%inclusion56 decks164 decks
26%synergy
Return of the Wildspeaker
26%inclusion43 decks164 decks
16%synergy
Second Harvest
26%inclusion42 decks164 decks
19%synergy
Nature's Claim
26%inclusion42 decks164 decks
16%synergy
Force of Negation
25%inclusion41 decks164 decks
16%synergy
Reality Shift
24%inclusion39 decks164 decks
9%synergy
Sink into Stupor
23%inclusion35 decks149 decks
12%synergy
Planar Genesis
22%inclusion33 decks149 decks
11%synergy
Krosan Grip
21%inclusion34 decks164 decks
13%synergy
Pact of Negation
21%inclusion34 decks164 decks
13%synergy
Chord of Calling
20%inclusion32 decks164 decks
12%synergy
Harrow
19%inclusion31 decks164 decks
7%synergy
Tamiyo's Safekeeping
18%inclusion30 decks164 decks
13%synergy
Simic Charm
18%inclusion29 decks164 decks
10%synergy
Brainstorm
17%inclusion28 decks164 decks
3%synergy
Resculpt
15%inclusion24 decks164 decks
9%synergy
Stubborn Denial
13%inclusion22 decks164 decks
11%synergy
Archdruid's Charm
13%inclusion22 decks164 decks
7%synergy
Voidslime
13%inclusion22 decks164 decks
8%synergy
Return to Nature
13%inclusion21 decks164 decks
7%synergy
Force of Vigor
12%inclusion20 decks164 decks
8%synergy
Plasm Capture
12%inclusion19 decks164 decks
8%synergy
Mystic Reflection
12%inclusion19 decks164 decks
9%synergy
Crop Rotation
11%inclusion18 decks164 decks
-2%synergy
Tyvar's Stand
10%inclusion17 decks164 decks
8%synergy
Disallow
10%inclusion17 decks164 decks
9%synergy
Collective Resistance
10%inclusion15 decks149 decks
6%synergy
Snakeskin Veil
10%inclusion16 decks164 decks
4%synergy
Entish Restoration
10%inclusion16 decks164 decks
0%synergy
Noxious Revival
10%inclusion16 decks164 decks
4%synergy
Joint Exploration
10%inclusion16 decks164 decks
4%synergy
Eureka Moment
9.1%inclusion15 decks164 decks
-2%synergy
Three Steps Ahead
9.0%inclusion14 decks155 decks
6%synergy
Strix Serenade
8.7%inclusion13 decks149 decks
5%synergy
Consult the Star Charts
8.6%inclusion7 decks81 decks
7%synergy
Aetherize
8.5%inclusion14 decks164 decks
-3%synergy
Frantic Search
7.9%inclusion13 decks164 decks
2%synergy
Slip Out the Back
7.9%inclusion13 decks164 decks
4%synergy
Narset's Reversal
7.9%inclusion13 decks164 decks
6%synergy
Mizzium Skin
7.3%inclusion12 decks164 decks
7%synergy
Sublime Epiphany
7.3%inclusion12 decks164 decks
5%synergy
Dispel
7.3%inclusion12 decks164 decks
3%synergy
Wash Away
7.3%inclusion12 decks164 decks
6%synergy
Sorceries
Farseek
52%inclusion86 decks164 decks
27%synergy
Skyshroud Claim
44%inclusion72 decks164 decks
35%synergy
Quantum Misalignment
27%inclusion45 decks164 decks
25%synergy
Triumph of the Hordes
23%inclusion37 decks164 decks
20%synergy
Bala Ged Recovery
22%inclusion36 decks164 decks
12%synergy
Explore
19%inclusion31 decks164 decks
-1%synergy
Finale of Devastation
18%inclusion30 decks164 decks
6%synergy
Sea Gate Restoration
18%inclusion29 decks164 decks
12%synergy
Migration Path
18%inclusion29 decks164 decks
14%synergy
Overwhelming Stampede
17%inclusion28 decks164 decks
5%synergy
Rishkar's Expertise
15%inclusion25 decks164 decks
7%synergy
Green Sun's Zenith
13%inclusion21 decks164 decks
4%synergy
Explosive Vegetation
12%inclusion20 decks164 decks
7%synergy
Regrowth
12%inclusion19 decks164 decks
8%synergy
Distant Melody
11%inclusion18 decks164 decks
8%synergy
Bridgeworks Battle
11%inclusion16 decks149 decks
6%synergy
Rite of Replication
10%inclusion17 decks164 decks
3%synergy
Open the Way
9.1%inclusion15 decks164 decks
7%synergy
Windfall
8.5%inclusion14 decks164 decks
4%synergy
Fabricate
8.5%inclusion14 decks164 decks
2%synergy
Into the North
7.9%inclusion13 decks164 decks
7%synergy
Harmonize
7.9%inclusion13 decks164 decks
2%synergy
Shamanic Revelation
7.9%inclusion13 decks164 decks
3%synergy
Raise the Palisade
7.9%inclusion13 decks164 decks
2%synergy
Turntimber Symbiosis
7.3%inclusion12 decks164 decks
5%synergy
Flare of Cultivation
7.0%inclusion11 decks157 decks
5%synergy
Curse of the Swine
6.7%inclusion11 decks164 decks
-4%synergy
Urban Evolution
6.7%inclusion11 decks164 decks
-3%synergy
Ponder
6.1%inclusion10 decks164 decks
-1%synergy
Polymorph
6.1%inclusion10 decks164 decks
6%synergy
Last March of the Ents
6.1%inclusion10 decks164 decks
2%synergy
Ezuri's Predation
6.1%inclusion10 decks164 decks
-1%synergy
Doppelgang
5.5%inclusion9 decks164 decks
-1%synergy
Ravenform
5.5%inclusion9 decks164 decks
1%synergy
Utility Artifacts
Lightning Greaves
45%inclusion74 decks164 decks
23%synergy
Swiftfoot Boots
35%inclusion57 decks164 decks
9%synergy
Helm of the Host
29%inclusion48 decks164 decks
24%synergy
Combine Chrysalis
16%inclusion26 decks164 decks
12%synergy
Mirror Box
15%inclusion25 decks164 decks
12%synergy
The One Ring
15%inclusion24 decks164 decks
7%synergy
Emerald Medallion
13%inclusion22 decks164 decks
10%synergy
Winter Orb
12%inclusion19 decks164 decks
11%synergy
Coat of Arms
10%inclusion16 decks164 decks
8%synergy
Sapphire Medallion
10%inclusion16 decks164 decks
7%synergy
Static Orb
9.1%inclusion15 decks164 decks
9%synergy
Skullclamp
8.5%inclusion14 decks164 decks
7%synergy
Idol of Oblivion
8.5%inclusion14 decks164 decks
5%synergy
Eldrazi Monument
8.5%inclusion14 decks164 decks
8%synergy
The Great Henge
7.9%inclusion13 decks164 decks
-1%synergy
Proteus Staff
6.1%inclusion10 decks164 decks
6%synergy
Enchantments
Doubling Season
47%inclusion77 decks164 decks
37%synergy
Mystic Remora
45%inclusion73 decks164 decks
29%synergy
Kindred Discovery
35%inclusion57 decks164 decks
25%synergy
Sylvan Library
22%inclusion36 decks164 decks
13%synergy
Primal Vigor
18%inclusion29 decks164 decks
15%synergy
Growing Rites of Itlimoc
16%inclusion27 decks164 decks
11%synergy
Beastmaster Ascension
15%inclusion25 decks164 decks
12%synergy
Exploration
15%inclusion24 decks164 decks
1%synergy
Utopia Sprawl
14%inclusion23 decks164 decks
7%synergy
Cryptolith Rite
13%inclusion22 decks164 decks
10%synergy
Wild Growth
13%inclusion22 decks164 decks
5%synergy
Verity Circle
13%inclusion21 decks164 decks
12%synergy
Wilderness Reclamation
13%inclusion21 decks164 decks
4%synergy
Kenrith's Transformation
12%inclusion19 decks164 decks
7%synergy
Paradox Haze
12%inclusion19 decks164 decks
11%synergy
Propaganda
12%inclusion19 decks164 decks
5%synergy
Dismiss into Dream
10%inclusion16 decks164 decks
9%synergy
Opposition
10%inclusion16 decks164 decks
9%synergy
Imprisoned in the Moon
9.1%inclusion15 decks164 decks
5%synergy
Impostor Syndrome
8.8%inclusion6 decks68 decks
7%synergy
Asceticism
8.5%inclusion14 decks164 decks
5%synergy
Defense of the Heart
7.9%inclusion13 decks164 decks
6%synergy
Garruk's Uprising
6.7%inclusion11 decks164 decks
-10%synergy
Moonlit Meditation
6.3%inclusion5 decks80 decks
5%synergy
Song of the Dryads
6.1%inclusion10 decks164 decks
5%synergy
Carpet of Flowers
5.5%inclusion9 decks164 decks
3%synergy
Leyline of Anticipation
5.5%inclusion9 decks164 decks
1%synergy
Planeswalkers
Oko, Thief of Crowns
41%inclusion68 decks164 decks
34%synergy
Narset, Parter of Veils
6.1%inclusion10 decks164 decks
5%synergy
Utility Lands
Reliquary Tower
57%inclusion94 decks164 decks
8%synergy
Boseiju, Who Endures
46%inclusion75 decks164 decks
23%synergy
Otawara, Soaring City
38%inclusion63 decks164 decks
19%synergy
Command Beacon
33%inclusion54 decks164 decks
29%synergy
Yavimaya, Cradle of Growth
31%inclusion51 decks164 decks
9%synergy
Mystic Sanctuary
23%inclusion38 decks164 decks
11%synergy
Mistrise Village
19%inclusion21 decks108 decks
9%synergy
Three Tree City
19%inclusion28 decks148 decks
14%synergy
Alchemist's Refuge
18%inclusion29 decks164 decks
0%synergy
Temple of the False God
16%inclusion27 decks164 decks
1%synergy
Evendo, Waking Haven
16%inclusion13 decks81 decks
11%synergy
Castle Garenbrig
15%inclusion24 decks164 decks
10%synergy
Mosswort Bridge
13%inclusion21 decks164 decks
-4%synergy
Gaea's Cradle
9.1%inclusion15 decks164 decks
2%synergy
Rogue's Passage
9.1%inclusion15 decks164 decks
-13%synergy
Urza's Saga
8.5%inclusion14 decks164 decks
3%synergy
Scavenger Grounds
6.7%inclusion11 decks164 decks
2%synergy
Castle Vantress
6.7%inclusion11 decks164 decks
0%synergy
Mana Artifacts
Sol Ring
92%inclusion151 decks164 decks
11%synergy
Arcane Signet
73%inclusion120 decks164 decks
10%synergy
Talisman of Curiosity
40%inclusion66 decks164 decks
18%synergy
Thought Vessel
39%inclusion64 decks164 decks
19%synergy
Simic Signet
35%inclusion57 decks164 decks
3%synergy
Fellwar Stone
13%inclusion21 decks164 decks
3%synergy
Lotus Petal
6.1%inclusion10 decks164 decks
-1%synergy
Thran Dynamo
6.1%inclusion10 decks164 decks
3%synergy
Commander's Sphere
5.5%inclusion9 decks164 decks
-3%synergy
Chrome Mox
5.5%inclusion9 decks164 decks
-1%synergy
Lands
Command Tower
94%inclusion154 decks164 decks
9%synergy
Forest
89%inclusion146 decks164 decks
-6%synergy
Island
88%inclusion145 decks164 decks
-7%synergy
Breeding Pool
74%inclusion121 decks164 decks
27%synergy
Hinterland Harbor
71%inclusion117 decks164 decks
12%synergy
Rejuvenating Springs
68%inclusion112 decks164 decks
24%synergy
Yavimaya Coast
65%inclusion106 decks164 decks
12%synergy
Dreamroot Cascade
58%inclusion95 decks164 decks
16%synergy
Misty Rainforest
51%inclusion84 decks164 decks
20%synergy
Flooded Grove
49%inclusion81 decks164 decks
8%synergy
Simic Growth Chamber
47%inclusion77 decks164 decks
-1%synergy
Barkchannel Pathway
42%inclusion69 decks164 decks
22%synergy
Waterlogged Grove
39%inclusion64 decks164 decks
18%synergy
Vineglimmer Snarl
33%inclusion54 decks164 decks
-6%synergy
Hedge Maze
30%inclusion49 decks164 decks
10%synergy
Temple of Mystery
26%inclusion43 decks164 decks
-12%synergy
Willowrush Verge
25%inclusion31 decks125 decks
8%synergy
Sink into Stupor
23%inclusion35 decks149 decks
12%synergy
Rimewood Falls
23%inclusion38 decks164 decks
14%synergy
Fabled Passage
23%inclusion37 decks164 decks
8%synergy
Exotic Orchard
23%inclusion37 decks164 decks
-1%synergy
Bala Ged Recovery
22%inclusion36 decks164 decks
12%synergy
Prismatic Vista
21%inclusion35 decks164 decks
14%synergy
Myriad Landscape
21%inclusion35 decks164 decks
0%synergy
Tropical Island
21%inclusion35 decks164 decks
7%synergy
Sea Gate Restoration
18%inclusion29 decks164 decks
12%synergy
Tangled Islet
18%inclusion29 decks164 decks
1%synergy
Snow-Covered Island
17%inclusion28 decks164 decks
10%synergy
Snow-Covered Forest
17%inclusion28 decks164 decks
10%synergy
Overflowing Basin
16%inclusion25 decks158 decks
-4%synergy
Windswept Heath
15%inclusion25 decks164 decks
5%synergy
Verdant Catacombs
14%inclusion23 decks164 decks
4%synergy
Flooded Strand
14%inclusion23 decks164 decks
3%synergy
Botanical Sanctum
13%inclusion22 decks164 decks
1%synergy
Polluted Delta
13%inclusion21 decks164 decks
2%synergy
Scalding Tarn
12%inclusion20 decks164 decks
2%synergy
Wooded Foothills
12%inclusion19 decks164 decks
2%synergy
Evolving Wilds
12%inclusion19 decks164 decks
-13%synergy
Glasspool Mimic
12%inclusion19 decks164 decks
7%synergy
Hydroelectric Specimen
11%inclusion16 decks149 decks
5%synergy
Bridgeworks Battle
11%inclusion16 decks149 decks
6%synergy
Disciple of Freyalise
9.4%inclusion14 decks149 decks
5%synergy
Blighted Woodland
8.5%inclusion14 decks164 decks
1%synergy
Littjara Mirrorlake
8.5%inclusion14 decks164 decks
5%synergy
Thornwood Falls
8.5%inclusion14 decks164 decks
-9%synergy
Turntimber Symbiosis
7.3%inclusion12 decks164 decks
5%synergy
Terramorphic Expanse
6.7%inclusion11 decks164 decks
-13%synergy
Mana Confluence
6.7%inclusion11 decks164 decks
1%synergy
Demolition Field
5.5%inclusion9 decks164 decks
3%synergy
Plaza of Heroes
5.5%inclusion9 decks164 decks
4%synergy
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