Koma, Cosmos Serpent (Commander) - Optimized

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #302
279decks
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
8.7%inclusion6 decks69 decks
3%synergy
Badgermole Cub
5.6%inclusion4 decks72 decks
1%synergy
Wan Shi Tong, Librarian
4.2%inclusion3 decks72 decks
-1%synergy
Ember Island Production
3.1%inclusion2 decks65 decks
2%synergy
Shared Roots
2.9%inclusion2 decks68 decks
-1%synergy
High Synergy Cards
Adrix and Nev, Twincasters
82%inclusion228 decks279 decks
73%synergy
Parallel Lives
75%inclusion208 decks279 decks
69%synergy
Spark Double
75%inclusion209 decks279 decks
65%synergy
Elemental Bond
70%inclusion194 decks279 decks
64%synergy
Sakashima of a Thousand Faces
68%inclusion191 decks279 decks
63%synergy
Whelming Wave
67%inclusion187 decks279 decks
56%synergy
Doubling Season
63%inclusion176 decks279 decks
54%synergy
Serpent of Yawning Depths
58%inclusion162 decks279 decks
52%synergy
Sakashima the Impostor
52%inclusion146 decks279 decks
50%synergy
Mana Drain
63%inclusion177 decks279 decks
48%synergy
Top Cards
Counterspell
77%inclusion214 decks279 decks
27%synergy
Cultivate
72%inclusion201 decks279 decks
25%synergy
Kodama's Reach
68%inclusion189 decks279 decks
32%synergy
Birds of Paradise
68%inclusion189 decks279 decks
40%synergy
Heroic Intervention
65%inclusion181 decks279 decks
35%synergy
Nature's Lore
64%inclusion178 decks279 decks
33%synergy
Beast Within
60%inclusion168 decks279 decks
10%synergy
Rampant Growth
59%inclusion166 decks279 decks
19%synergy
Three Visits
59%inclusion165 decks279 decks
36%synergy
Koma, World-Eater
59%inclusion161 decks275 decks
45%synergy
Game Changers
Cyclonic Rift
80%inclusion223 decks279 decks
54%synergy
Rhystic Study
75%inclusion209 decks279 decks
53%synergy
Fierce Guardianship
69%inclusion192 decks279 decks
51%synergy
Seedborn Muse
47%inclusion130 decks279 decks
31%synergy
Worldly Tutor
47%inclusion130 decks279 decks
31%synergy
Mystical Tutor
41%inclusion113 decks279 decks
31%synergy
Force of Will
40%inclusion111 decks279 decks
30%synergy
Consecrated Sphinx
37%inclusion102 decks279 decks
28%synergy
Ancient Tomb
32%inclusion90 decks279 decks
23%synergy
Mana Vault
21%inclusion58 decks279 decks
14%synergy
Creatures
Llanowar Elves
52%inclusion145 decks279 decks
24%synergy
Craterhoof Behemoth
50%inclusion139 decks279 decks
40%synergy
Aesi, Tyrant of Gyre Strait
49%inclusion136 decks279 decks
31%synergy
Spawning Kraken
47%inclusion131 decks279 decks
40%synergy
Elvish Mystic
44%inclusion124 decks279 decks
20%synergy
Junk Winder
44%inclusion124 decks279 decks
38%synergy
Ohran Frostfang
35%inclusion97 decks279 decks
31%synergy
Roaming Throne
34%inclusion95 decks279 decks
26%synergy
Eternal Witness
31%inclusion87 decks279 decks
10%synergy
Fyndhorn Elves
31%inclusion86 decks279 decks
15%synergy
Arixmethes, Slumbering Isle
30%inclusion84 decks279 decks
17%synergy
Tatyova, Benthic Druid
29%inclusion81 decks279 decks
-2%synergy
Sakura-Tribe Elder
29%inclusion81 decks279 decks
10%synergy
Enduring Vitality
28%inclusion77 decks278 decks
20%synergy
Hullbreaker Horror
25%inclusion70 decks279 decks
7%synergy
Murkfiend Liege
24%inclusion68 decks279 decks
10%synergy
Garruk's Packleader
23%inclusion65 decks279 decks
21%synergy
Fanatic of Rhonas
22%inclusion61 decks279 decks
16%synergy
Delighted Halfling
21%inclusion58 decks279 decks
9%synergy
Summon: Leviathan
19%inclusion37 decks193 decks
12%synergy
Azusa, Lost but Seeking
19%inclusion53 decks279 decks
5%synergy
Archetype of Imagination
19%inclusion52 decks279 decks
14%synergy
Toski, Bearer of Secrets
14%inclusion38 decks279 decks
10%synergy
Slinn Voda, the Rising Deep
13%inclusion37 decks279 decks
7%synergy
Octomancer
13%inclusion35 decks279 decks
8%synergy
Esix, Fractal Bloom
12%inclusion34 decks279 decks
8%synergy
Kinnan, Bonder Prodigy
12%inclusion34 decks279 decks
9%synergy
Nezahal, Primal Tide
12%inclusion34 decks279 decks
1%synergy
Coiling Oracle
12%inclusion33 decks279 decks
-1%synergy
Scute Swarm
12%inclusion33 decks279 decks
-9%synergy
Saryth, the Viper's Fang
11%inclusion31 decks279 decks
9%synergy
Curiosity Crafter
11%inclusion30 decks279 decks
7%synergy
Enduring Curiosity
10%inclusion29 decks278 decks
7%synergy
Lotus Cobra
10%inclusion29 decks279 decks
-3%synergy
Uro, Titan of Nature's Wrath
10%inclusion29 decks279 decks
1%synergy
Glasspool Mimic
10%inclusion28 decks279 decks
6%synergy
Tireless Provisioner
10%inclusion27 decks279 decks
-6%synergy
Reclamation Sage
9.3%inclusion26 decks279 decks
-5%synergy
Circle of Dreams Druid
9.3%inclusion26 decks279 decks
7%synergy
Vorinclex, Voice of Hunger
8.6%inclusion24 decks279 decks
6%synergy
Avenger of Zendikar
8.2%inclusion23 decks279 decks
-10%synergy
Xolatoyac, the Smiling Flood
7.9%inclusion22 decks279 decks
1%synergy
Arbor Elf
7.9%inclusion22 decks279 decks
2%synergy
Hydroelectric Specimen
7.9%inclusion22 decks279 decks
2%synergy
Oracle of Mul Daya
7.9%inclusion22 decks279 decks
-1%synergy
Faerie Mastermind
7.9%inclusion22 decks279 decks
3%synergy
Selvala, Heart of the Wilds
7.9%inclusion22 decks279 decks
5%synergy
Starwinder
7.9%inclusion11 decks140 decks
1%synergy
Dryad of the Ilysian Grove
7.2%inclusion20 decks279 decks
-3%synergy
Inga and Esika
6.8%inclusion19 decks279 decks
4%synergy
Instants
Swan Song
54%inclusion151 decks279 decks
35%synergy
Pongify
46%inclusion128 decks279 decks
21%synergy
An Offer You Can't Refuse
44%inclusion124 decks279 decks
21%synergy
Growth Spiral
43%inclusion121 decks279 decks
-1%synergy
Double Major
38%inclusion105 decks279 decks
29%synergy
Negate
36%inclusion100 decks279 decks
10%synergy
Arcane Denial
35%inclusion99 decks279 decks
13%synergy
Rapid Hybridization
33%inclusion93 decks279 decks
7%synergy
Force of Negation
32%inclusion88 decks279 decks
23%synergy
Second Harvest
31%inclusion87 decks279 decks
25%synergy
Return of the Wildspeaker
23%inclusion65 decks279 decks
13%synergy
Pact of Negation
23%inclusion63 decks279 decks
15%synergy
Sink into Stupor
18%inclusion50 decks279 decks
6%synergy
Chord of Calling
17%inclusion48 decks279 decks
9%synergy
Krosan Grip
17%inclusion47 decks279 decks
9%synergy
Brainstorm
15%inclusion43 decks279 decks
1%synergy
Nature's Claim
15%inclusion43 decks279 decks
6%synergy
Reality Shift
15%inclusion42 decks279 decks
0%synergy
Tamiyo's Safekeeping
14%inclusion39 decks279 decks
8%synergy
Voidslime
13%inclusion37 decks279 decks
8%synergy
Archdruid's Charm
13%inclusion35 decks279 decks
6%synergy
Mystic Reflection
12%inclusion33 decks279 decks
9%synergy
Noxious Revival
11%inclusion32 decks279 decks
5%synergy
Planar Genesis
11%inclusion32 decks279 decks
1%synergy
Strix Serenade
11%inclusion31 decks279 decks
7%synergy
Stubborn Denial
11%inclusion30 decks279 decks
8%synergy
Crop Rotation
11%inclusion30 decks279 decks
-3%synergy
Force of Vigor
11%inclusion30 decks279 decks
6%synergy
Harrow
11%inclusion30 decks279 decks
-1%synergy
Resculpt
9.3%inclusion26 decks279 decks
3%synergy
Simic Charm
9.3%inclusion26 decks279 decks
1%synergy
Muddle the Mixture
8.2%inclusion23 decks279 decks
4%synergy
Return to Nature
7.2%inclusion20 decks279 decks
2%synergy
Snakeskin Veil
7.2%inclusion20 decks279 decks
1%synergy
Narset's Reversal
7.2%inclusion20 decks279 decks
6%synergy
Disallow
6.5%inclusion18 decks279 decks
5%synergy
Flusterstorm
6.5%inclusion18 decks279 decks
0%synergy
Veil of Summer
6.5%inclusion18 decks279 decks
0%synergy
Dispel
6.5%inclusion18 decks279 decks
2%synergy
Eureka Moment
6.1%inclusion17 decks279 decks
-5%synergy
Collective Resistance
6.1%inclusion17 decks279 decks
3%synergy
Legolas's Quick Reflexes
6.1%inclusion17 decks279 decks
4%synergy
Tyvar's Stand
5.7%inclusion16 decks279 decks
3%synergy
Decisive Denial
5.0%inclusion14 decks279 decks
0%synergy
Entish Restoration
5.0%inclusion14 decks279 decks
-4%synergy
Sorceries
Farseek
53%inclusion149 decks279 decks
28%synergy
Irenicus's Vile Duplication
48%inclusion134 decks279 decks
42%synergy
Skyshroud Claim
43%inclusion120 decks279 decks
34%synergy
Finale of Devastation
28%inclusion77 decks279 decks
16%synergy
Quantum Misalignment
23%inclusion64 decks279 decks
20%synergy
Triumph of the Hordes
19%inclusion54 decks279 decks
16%synergy
Overwhelming Stampede
19%inclusion53 decks279 decks
7%synergy
Bala Ged Recovery
16%inclusion45 decks279 decks
6%synergy
Explore
15%inclusion43 decks279 decks
-5%synergy
Sea Gate Restoration
14%inclusion38 decks279 decks
8%synergy
Green Sun's Zenith
13%inclusion37 decks279 decks
4%synergy
Rite of Replication
13%inclusion36 decks279 decks
6%synergy
Migration Path
10%inclusion29 decks279 decks
7%synergy
Distant Melody
10%inclusion27 decks279 decks
6%synergy
Shamanic Revelation
9.0%inclusion25 decks279 decks
4%synergy
Rishkar's Expertise
8.6%inclusion24 decks279 decks
0%synergy
Ponder
8.2%inclusion23 decks279 decks
1%synergy
Windfall
7.5%inclusion21 decks279 decks
3%synergy
Explosive Vegetation
7.5%inclusion21 decks279 decks
2%synergy
Regrowth
6.8%inclusion19 decks279 decks
3%synergy
Bridgeworks Battle
6.8%inclusion19 decks279 decks
2%synergy
Raise the Palisade
6.5%inclusion18 decks279 decks
0%synergy
Flare of Cultivation
6.5%inclusion18 decks279 decks
4%synergy
Urban Evolution
6.5%inclusion18 decks279 decks
-3%synergy
Natural Order
6.1%inclusion17 decks279 decks
5%synergy
Time Warp
5.7%inclusion16 decks279 decks
4%synergy
Expropriate
5.7%inclusion16 decks279 decks
4%synergy
Curse of the Swine
5.4%inclusion15 decks279 decks
-5%synergy
Harmonize
5.4%inclusion15 decks279 decks
0%synergy
Doppelgang
5.4%inclusion15 decks279 decks
-1%synergy
Fabricate
5.0%inclusion14 decks279 decks
-2%synergy
Last March of the Ents
5.0%inclusion14 decks279 decks
1%synergy
Utility Artifacts
Lightning Greaves
50%inclusion140 decks279 decks
28%synergy
Helm of the Host
43%inclusion120 decks279 decks
38%synergy
Swiftfoot Boots
41%inclusion115 decks279 decks
16%synergy
The One Ring
20%inclusion57 decks279 decks
13%synergy
Combine Chrysalis
17%inclusion48 decks279 decks
13%synergy
Emerald Medallion
14%inclusion40 decks279 decks
11%synergy
The Great Henge
14%inclusion39 decks279 decks
5%synergy
Mirror Box
12%inclusion34 decks279 decks
9%synergy
Sapphire Medallion
11%inclusion32 decks279 decks
8%synergy
Eldrazi Monument
10%inclusion27 decks279 decks
9%synergy
Banner of Kinship
7.3%inclusion20 decks275 decks
5%synergy
Idol of Oblivion
7.2%inclusion20 decks279 decks
4%synergy
Coat of Arms
6.8%inclusion19 decks279 decks
5%synergy
Skullclamp
6.8%inclusion19 decks279 decks
6%synergy
Winter Orb
5.4%inclusion15 decks279 decks
5%synergy
Enchantments
Tribute to the World Tree
52%inclusion144 decks279 decks
45%synergy
Mystic Remora
48%inclusion134 decks279 decks
33%synergy
Kindred Discovery
36%inclusion101 decks279 decks
26%synergy
Sylvan Library
33%inclusion92 decks279 decks
24%synergy
Growing Rites of Itlimoc
24%inclusion66 decks279 decks
18%synergy
Exploration
21%inclusion58 decks279 decks
8%synergy
Cryptolith Rite
20%inclusion56 decks279 decks
17%synergy
Wild Growth
17%inclusion48 decks279 decks
8%synergy
Primal Vigor
17%inclusion47 decks279 decks
14%synergy
Utopia Sprawl
16%inclusion45 decks279 decks
10%synergy
Defense of the Heart
14%inclusion39 decks279 decks
12%synergy
Burgeoning
12%inclusion33 decks279 decks
5%synergy
Beastmaster Ascension
12%inclusion33 decks279 decks
9%synergy
Carpet of Flowers
11%inclusion31 decks279 decks
8%synergy
Garruk's Uprising
11%inclusion31 decks279 decks
-5%synergy
Unnatural Growth
11%inclusion31 decks279 decks
8%synergy
Propaganda
11%inclusion31 decks279 decks
4%synergy
Paradox Haze
10%inclusion29 decks279 decks
10%synergy
Kenrith's Transformation
8.6%inclusion24 decks279 decks
4%synergy
Imprisoned in the Moon
8.2%inclusion23 decks279 decks
4%synergy
Omniscience
6.5%inclusion18 decks279 decks
2%synergy
Asceticism
6.5%inclusion18 decks279 decks
3%synergy
Wilderness Reclamation
5.7%inclusion16 decks279 decks
-3%synergy
Opposition
5.7%inclusion16 decks279 decks
5%synergy
Dismiss into Dream
5.7%inclusion16 decks279 decks
5%synergy
Planeswalkers
Oko, Thief of Crowns
37%inclusion102 decks279 decks
30%synergy
Utility Lands
Reliquary Tower
61%inclusion171 decks279 decks
12%synergy
Boseiju, Who Endures
47%inclusion132 decks279 decks
25%synergy
Otawara, Soaring City
37%inclusion102 decks279 decks
17%synergy
Yavimaya, Cradle of Growth
35%inclusion99 decks279 decks
13%synergy
Command Beacon
24%inclusion68 decks279 decks
20%synergy
Three Tree City
22%inclusion62 decks279 decks
17%synergy
Gaea's Cradle
20%inclusion56 decks279 decks
13%synergy
Mistrise Village
17%inclusion40 decks236 decks
6%synergy
Mystic Sanctuary
16%inclusion44 decks279 decks
3%synergy
Castle Garenbrig
16%inclusion44 decks279 decks
11%synergy
Temple of the False God
15%inclusion43 decks279 decks
0%synergy
Evendo, Waking Haven
15%inclusion22 decks144 decks
10%synergy
Mosswort Bridge
14%inclusion39 decks279 decks
-3%synergy
Alchemist's Refuge
13%inclusion37 decks279 decks
-4%synergy
Rogue's Passage
13%inclusion37 decks279 decks
-9%synergy
Shifting Woodland
7.5%inclusion21 decks279 decks
1%synergy
Urza's Saga
7.5%inclusion21 decks279 decks
2%synergy
Minamo, School at Water's Edge
6.8%inclusion19 decks279 decks
0%synergy
Scavenger Grounds
5.7%inclusion16 decks279 decks
1%synergy
Field of the Dead
5.7%inclusion16 decks279 decks
0%synergy
Castle Vantress
5.4%inclusion15 decks279 decks
-2%synergy
Strip Mine
5.0%inclusion14 decks279 decks
2%synergy
Restless Vinestalk
5.0%inclusion14 decks279 decks
0%synergy
Mana Artifacts
Sol Ring
96%inclusion267 decks279 decks
15%synergy
Arcane Signet
85%inclusion236 decks279 decks
22%synergy
Thought Vessel
44%inclusion122 decks279 decks
23%synergy
Talisman of Curiosity
38%inclusion105 decks279 decks
16%synergy
Simic Signet
35%inclusion97 decks279 decks
3%synergy
Chrome Mox
16%inclusion44 decks279 decks
9%synergy
Fellwar Stone
13%inclusion35 decks279 decks
3%synergy
Lotus Petal
10%inclusion29 decks279 decks
3%synergy
Thran Dynamo
7.5%inclusion21 decks279 decks
5%synergy
Mox Diamond
7.5%inclusion21 decks279 decks
2%synergy
Commander's Sphere
6.1%inclusion17 decks279 decks
-2%synergy
Basalt Monolith
6.1%inclusion17 decks279 decks
-1%synergy
Lands
Command Tower
93%inclusion260 decks279 decks
8%synergy
Forest
93%inclusion260 decks279 decks
-2%synergy
Island
93%inclusion259 decks279 decks
-3%synergy
Breeding Pool
78%inclusion218 decks279 decks
32%synergy
Rejuvenating Springs
73%inclusion205 decks279 decks
30%synergy
Hinterland Harbor
72%inclusion200 decks279 decks
12%synergy
Yavimaya Coast
63%inclusion176 decks279 decks
11%synergy
Misty Rainforest
59%inclusion166 decks279 decks
28%synergy
Dreamroot Cascade
57%inclusion159 decks279 decks
15%synergy
Barkchannel Pathway
53%inclusion147 decks279 decks
32%synergy
Flooded Grove
47%inclusion130 decks279 decks
5%synergy
Simic Growth Chamber
41%inclusion113 decks279 decks
-8%synergy
Waterlogged Grove
33%inclusion92 decks279 decks
12%synergy
Vineglimmer Snarl
32%inclusion89 decks279 decks
-7%synergy
Hedge Maze
28%inclusion77 decks279 decks
8%synergy
Tropical Island
28%inclusion77 decks279 decks
13%synergy
Fabled Passage
27%inclusion74 decks279 decks
12%synergy
Temple of Mystery
26%inclusion72 decks279 decks
-12%synergy
Willowrush Verge
26%inclusion70 decks273 decks
9%synergy
Exotic Orchard
24%inclusion66 decks279 decks
0%synergy
Prismatic Vista
19%inclusion53 decks279 decks
12%synergy
Myriad Landscape
18%inclusion51 decks279 decks
-4%synergy
Flooded Strand
18%inclusion50 decks279 decks
7%synergy
Sink into Stupor
18%inclusion50 decks279 decks
6%synergy
Botanical Sanctum
17%inclusion47 decks279 decks
4%synergy
Bala Ged Recovery
16%inclusion45 decks279 decks
6%synergy
Windswept Heath
16%inclusion44 decks279 decks
5%synergy
Scalding Tarn
15%inclusion42 decks279 decks
5%synergy
Verdant Catacombs
15%inclusion42 decks279 decks
5%synergy
Rimewood Falls
15%inclusion42 decks279 decks
6%synergy
Polluted Delta
14%inclusion40 decks279 decks
4%synergy
Sea Gate Restoration
14%inclusion38 decks279 decks
8%synergy
Snow-Covered Forest
13%inclusion37 decks279 decks
7%synergy
Snow-Covered Island
13%inclusion36 decks279 decks
6%synergy
Evolving Wilds
13%inclusion36 decks279 decks
-12%synergy
Wooded Foothills
13%inclusion36 decks279 decks
3%synergy
Thornwood Falls
13%inclusion35 decks279 decks
-5%synergy
Overflowing Basin
12%inclusion34 decks279 decks
-7%synergy
City of Brass
11%inclusion30 decks279 decks
5%synergy
Mana Confluence
11%inclusion30 decks279 decks
5%synergy
Tangled Islet
11%inclusion30 decks279 decks
-6%synergy
Reflecting Pool
10%inclusion29 decks279 decks
7%synergy
Terramorphic Expanse
10%inclusion28 decks279 decks
-10%synergy
Glasspool Mimic
10%inclusion28 decks279 decks
6%synergy
Path of Ancestry
8.6%inclusion24 decks279 decks
-8%synergy
Hydroelectric Specimen
7.9%inclusion22 decks279 decks
2%synergy
Gemstone Caverns
7.5%inclusion21 decks279 decks
2%synergy
Bridgeworks Battle
6.8%inclusion19 decks279 decks
2%synergy
Cavern of Souls
6.5%inclusion18 decks279 decks
1%synergy
Disciple of Freyalise
5.0%inclusion14 decks279 decks
0%synergy
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