Koma, Cosmos Serpent (Commander)

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #308
6,695decks
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
14%inclusion147 decks1.02K decks
9%synergy
Sodden Verdure
10%inclusion2 decks20 decks
8%synergy
Shared Roots
8.2%inclusion81 decks992 decks
5%synergy
Rain-Slicked Copse
5.0%inclusion1 decks20 decks
4%synergy
Ember Island Production
4.7%inclusion46 decks972 decks
4%synergy
High Synergy Cards
Adrix and Nev, Twincasters
76%inclusion5.09K decks6.70K decks
68%synergy
Elemental Bond
68%inclusion4.52K decks6.70K decks
62%synergy
Whelming Wave
73%inclusion4.87K decks6.70K decks
62%synergy
Spark Double
63%inclusion4.24K decks6.70K decks
54%synergy
Koma, World-Eater
65%inclusion3.16K decks4.86K decks
52%synergy
Junk Winder
57%inclusion3.82K decks6.70K decks
50%synergy
Parallel Lives
55%inclusion3.67K decks6.70K decks
49%synergy
Serpent of Yawning Depths
54%inclusion3.65K decks6.70K decks
48%synergy
Irenicus's Vile Duplication
52%inclusion3.51K decks6.70K decks
46%synergy
Sakashima of a Thousand Faces
49%inclusion3.31K decks6.70K decks
44%synergy
Top Cards
Cultivate
78%inclusion5.22K decks6.70K decks
31%synergy
Counterspell
74%inclusion4.94K decks6.70K decks
24%synergy
Kodama's Reach
70%inclusion4.70K decks6.70K decks
34%synergy
Rampant Growth
69%inclusion4.61K decks6.70K decks
28%synergy
Beast Within
61%inclusion4.10K decks6.70K decks
11%synergy
Nature's Lore
58%inclusion3.89K decks6.70K decks
28%synergy
Growth Spiral
56%inclusion3.77K decks6.70K decks
12%synergy
Farseek
54%inclusion3.60K decks6.70K decks
29%synergy
Heroic Intervention
54%inclusion3.59K decks6.70K decks
23%synergy
Aesi, Tyrant of Gyre Strait
53%inclusion3.54K decks6.70K decks
36%synergy
Game Changers
Cyclonic Rift
44%inclusion2.94K decks6.70K decks
18%synergy
Rhystic Study
40%inclusion2.67K decks6.70K decks
18%synergy
Fierce Guardianship
32%inclusion2.16K decks6.70K decks
15%synergy
Seedborn Muse
29%inclusion1.92K decks6.70K decks
13%synergy
Worldly Tutor
22%inclusion1.50K decks6.70K decks
7%synergy
Consecrated Sphinx
20%inclusion1.33K decks6.70K decks
11%synergy
Mystical Tutor
16%inclusion1.08K decks6.70K decks
7%synergy
Force of Will
14%inclusion924 decks6.70K decks
4%synergy
Ancient Tomb
13%inclusion872 decks6.70K decks
4%synergy
Gaea's Cradle
10%inclusion672 decks6.70K decks
3%synergy
Creatures
Llanowar Elves
49%inclusion3.30K decks6.70K decks
21%synergy
Spawning Kraken
47%inclusion3.17K decks6.70K decks
40%synergy
Birds of Paradise
46%inclusion3.09K decks6.70K decks
18%synergy
Arixmethes, Slumbering Isle
42%inclusion2.85K decks6.70K decks
29%synergy
Sakura-Tribe Elder
40%inclusion2.65K decks6.70K decks
20%synergy
Elvish Mystic
39%inclusion2.59K decks6.70K decks
15%synergy
Sakashima the Impostor
38%inclusion2.57K decks6.70K decks
36%synergy
Tatyova, Benthic Druid
38%inclusion2.53K decks6.70K decks
7%synergy
Murkfiend Liege
36%inclusion2.38K decks6.70K decks
21%synergy
Garruk's Packleader
33%inclusion2.20K decks6.70K decks
31%synergy
Craterhoof Behemoth
33%inclusion2.18K decks6.70K decks
23%synergy
Hullbreaker Horror
30%inclusion2.01K decks6.70K decks
12%synergy
Ohran Frostfang
29%inclusion1.95K decks6.70K decks
26%synergy
Eternal Witness
29%inclusion1.94K decks6.70K decks
8%synergy
Summon: Leviathan
29%inclusion793 decks2.78K decks
21%synergy
Fyndhorn Elves
28%inclusion1.86K decks6.70K decks
12%synergy
Roaming Throne
28%inclusion1.85K decks6.70K decks
20%synergy
Enduring Vitality
25%inclusion1.34K decks5.29K decks
18%synergy
Slinn Voda, the Rising Deep
25%inclusion1.69K decks6.70K decks
19%synergy
Octomancer
25%inclusion1.39K decks5.58K decks
20%synergy
Esix, Fractal Bloom
24%inclusion1.62K decks6.70K decks
20%synergy
Archetype of Imagination
23%inclusion1.52K decks6.70K decks
18%synergy
Coiling Oracle
21%inclusion1.38K decks6.70K decks
7%synergy
Fanatic of Rhonas
20%inclusion1.15K decks5.87K decks
14%synergy
Scourge of Fleets
16%inclusion1.09K decks6.70K decks
8%synergy
Curiosity Crafter
15%inclusion976 decks6.70K decks
11%synergy
Xolatoyac, the Smiling Flood
15%inclusion972 decks6.70K decks
7%synergy
Reclamation Sage
14%inclusion965 decks6.70K decks
0%synergy
Nezahal, Primal Tide
14%inclusion963 decks6.70K decks
3%synergy
Scute Swarm
14%inclusion956 decks6.70K decks
-7%synergy
Starwinder
14%inclusion296 decks2.13K decks
7%synergy
Chameleon, Master of Disguise
14%inclusion223 decks1.62K decks
11%synergy
Delighted Halfling
14%inclusion904 decks6.70K decks
2%synergy
Nadir Kraken
13%inclusion887 decks6.70K decks
9%synergy
Enduring Curiosity
13%inclusion693 decks5.35K decks
10%synergy
Toski, Bearer of Secrets
13%inclusion852 decks6.70K decks
9%synergy
Avenger of Zendikar
13%inclusion842 decks6.70K decks
-5%synergy
Azusa, Lost but Seeking
12%inclusion814 decks6.70K decks
-2%synergy
Stormtide Leviathan
12%inclusion791 decks6.70K decks
6%synergy
Troyan, Gutsy Explorer
12%inclusion780 decks6.70K decks
9%synergy
Rampaging Baloths
11%inclusion744 decks6.70K decks
-6%synergy
Saryth, the Viper's Fang
11%inclusion729 decks6.70K decks
9%synergy
Lotus Cobra
10%inclusion666 decks6.70K decks
-4%synergy
Uro, Titan of Nature's Wrath
10%inclusion657 decks6.70K decks
0%synergy
Progenitor Mimic
10%inclusion656 decks6.70K decks
5%synergy
Circle of Dreams Druid
10%inclusion638 decks6.70K decks
7%synergy
Clever Impersonator
9.2%inclusion619 decks6.70K decks
4%synergy
Inga and Esika
9.1%inclusion612 decks6.70K decks
6%synergy
Jaheira, Friend of the Forest
9.1%inclusion610 decks6.70K decks
5%synergy
Kiora, Sovereign of the Deep
9.0%inclusion604 decks6.70K decks
7%synergy
Instants
Negate
47%inclusion3.12K decks6.70K decks
21%synergy
Double Major
46%inclusion3.11K decks6.70K decks
38%synergy
Pongify
40%inclusion2.65K decks6.70K decks
15%synergy
Arcane Denial
37%inclusion2.49K decks6.70K decks
15%synergy
An Offer You Can't Refuse
37%inclusion2.47K decks6.70K decks
13%synergy
Second Harvest
37%inclusion2.47K decks6.70K decks
30%synergy
Mana Drain
35%inclusion2.33K decks6.70K decks
19%synergy
Swan Song
32%inclusion2.14K decks6.70K decks
13%synergy
Return of the Wildspeaker
32%inclusion2.11K decks6.70K decks
21%synergy
Rapid Hybridization
31%inclusion2.06K decks6.70K decks
5%synergy
Krosan Grip
23%inclusion1.54K decks6.70K decks
15%synergy
Simic Charm
19%inclusion1.25K decks6.70K decks
11%synergy
Reality Shift
18%inclusion1.22K decks6.70K decks
4%synergy
Nature's Claim
16%inclusion1.10K decks6.70K decks
7%synergy
Brainstorm
16%inclusion1.06K decks6.70K decks
1%synergy
Planar Genesis
15%inclusion881 decks5.85K decks
4%synergy
Harrow
14%inclusion970 decks6.70K decks
3%synergy
Tamiyo's Safekeeping
13%inclusion855 decks6.70K decks
7%synergy
Voidslime
13%inclusion850 decks6.70K decks
8%synergy
Return to Nature
12%inclusion834 decks6.70K decks
7%synergy
Aetherize
12%inclusion823 decks6.70K decks
0%synergy
Eureka Moment
12%inclusion801 decks6.70K decks
1%synergy
Snakeskin Veil
12%inclusion778 decks6.70K decks
6%synergy
Sink into Stupor
11%inclusion667 decks5.88K decks
0%synergy
Force of Negation
11%inclusion750 decks6.70K decks
3%synergy
Plasm Capture
11%inclusion743 decks6.70K decks
8%synergy
Mystic Reflection
11%inclusion718 decks6.70K decks
8%synergy
Chord of Calling
10%inclusion673 decks6.70K decks
2%synergy
Pact of Negation
8.9%inclusion593 decks6.70K decks
2%synergy
Entish Restoration
8.3%inclusion556 decks6.70K decks
-1%synergy
Archdruid's Charm
7.9%inclusion523 decks6.60K decks
2%synergy
Perplexing Test
7.8%inclusion525 decks6.70K decks
3%synergy
Stubborn Denial
7.8%inclusion522 decks6.70K decks
5%synergy
Disallow
7.6%inclusion507 decks6.70K decks
6%synergy
Resculpt
7.5%inclusion503 decks6.70K decks
1%synergy
Noxious Revival
7.5%inclusion503 decks6.70K decks
1%synergy
Decisive Denial
7.5%inclusion499 decks6.70K decks
2%synergy
Sublime Epiphany
7.3%inclusion488 decks6.70K decks
5%synergy
Tyvar's Stand
6.3%inclusion425 decks6.70K decks
4%synergy
Narset's Reversal
6.3%inclusion423 decks6.70K decks
5%synergy
Strix Serenade
6.1%inclusion361 decks5.88K decks
2%synergy
Force of Vigor
5.9%inclusion396 decks6.70K decks
1%synergy
Collective Resistance
5.6%inclusion328 decks5.88K decks
2%synergy
Auroral Procession
5.5%inclusion183 decks3.35K decks
2%synergy
Lazotep Plating
5.5%inclusion365 decks6.70K decks
5%synergy
Joint Exploration
5.4%inclusion359 decks6.70K decks
0%synergy
Sorceries
Three Visits
49%inclusion3.26K decks6.70K decks
25%synergy
Skyshroud Claim
38%inclusion2.55K decks6.70K decks
29%synergy
Explore
28%inclusion1.86K decks6.70K decks
8%synergy
Quantum Misalignment
27%inclusion1.84K decks6.70K decks
25%synergy
Overwhelming Stampede
24%inclusion1.61K decks6.70K decks
12%synergy
Rite of Replication
17%inclusion1.15K decks6.70K decks
10%synergy
Shamanic Revelation
16%inclusion1.07K decks6.70K decks
11%synergy
Migration Path
15%inclusion1.01K decks6.70K decks
12%synergy
Urban Evolution
14%inclusion952 decks6.70K decks
5%synergy
Rishkar's Expertise
14%inclusion941 decks6.70K decks
6%synergy
Finale of Devastation
12%inclusion830 decks6.70K decks
1%synergy
Triumph of the Hordes
12%inclusion830 decks6.70K decks
9%synergy
Bala Ged Recovery
12%inclusion827 decks6.70K decks
2%synergy
Distant Melody
12%inclusion814 decks6.70K decks
9%synergy
Explosive Vegetation
12%inclusion799 decks6.70K decks
6%synergy
Harmonize
11%inclusion706 decks6.70K decks
5%synergy
Curse of the Swine
8.7%inclusion585 decks6.70K decks
-2%synergy
Ponder
8.4%inclusion563 decks6.70K decks
1%synergy
Search for Tomorrow
8.4%inclusion562 decks6.70K decks
4%synergy
Regrowth
7.6%inclusion506 decks6.70K decks
4%synergy
Doppelgang
7.2%inclusion479 decks6.62K decks
1%synergy
Sea Gate Restoration
7.1%inclusion472 decks6.70K decks
2%synergy
Ravenform
6.7%inclusion448 decks6.70K decks
2%synergy
Green Sun's Zenith
6.6%inclusion440 decks6.70K decks
-2%synergy
Windfall
6.1%inclusion410 decks6.70K decks
2%synergy
Preposterous Proportions
6.1%inclusion294 decks4.82K decks
5%synergy
Ezuri's Predation
5.8%inclusion388 decks6.70K decks
-2%synergy
Preordain
5.5%inclusion365 decks6.70K decks
-3%synergy
Broken Bond
5.2%inclusion351 decks6.70K decks
0%synergy
Quasiduplicate
5.2%inclusion347 decks6.70K decks
3%synergy
Flare of Cultivation
5.0%inclusion319 decks6.37K decks
3%synergy
Utility Artifacts
Swiftfoot Boots
44%inclusion2.97K decks6.70K decks
19%synergy
Helm of the Host
42%inclusion2.84K decks6.70K decks
37%synergy
Lightning Greaves
41%inclusion2.76K decks6.70K decks
20%synergy
Combine Chrysalis
26%inclusion1.72K decks6.70K decks
21%synergy
Mirror Box
18%inclusion1.17K decks6.70K decks
14%synergy
Emerald Medallion
13%inclusion885 decks6.70K decks
10%synergy
The Great Henge
12%inclusion783 decks6.70K decks
3%synergy
Idol of Oblivion
11%inclusion754 decks6.70K decks
8%synergy
Sapphire Medallion
10%inclusion698 decks6.70K decks
7%synergy
Eldrazi Monument
10%inclusion648 decks6.70K decks
9%synergy
Bident of Thassa
9.2%inclusion617 decks6.70K decks
2%synergy
Coat of Arms
7.5%inclusion499 decks6.70K decks
6%synergy
The One Ring
7.0%inclusion469 decks6.70K decks
-1%synergy
Banner of Kinship
5.7%inclusion275 decks4.84K decks
4%synergy
Enchantments
Doubling Season
49%inclusion3.28K decks6.70K decks
39%synergy
Tribute to the World Tree
44%inclusion2.94K decks6.70K decks
38%synergy
Kindred Discovery
31%inclusion2.09K decks6.70K decks
21%synergy
Mystic Remora
28%inclusion1.84K decks6.70K decks
12%synergy
Primal Vigor
18%inclusion1.23K decks6.70K decks
15%synergy
Garruk's Uprising
18%inclusion1.23K decks6.70K decks
2%synergy
Growing Rites of Itlimoc
18%inclusion1.18K decks6.70K decks
12%synergy
Wild Growth
16%inclusion1.04K decks6.70K decks
7%synergy
Sylvan Library
15%inclusion1.01K decks6.70K decks
6%synergy
Cryptolith Rite
15%inclusion990 decks6.70K decks
12%synergy
Beastmaster Ascension
15%inclusion985 decks6.70K decks
12%synergy
Exploration
15%inclusion973 decks6.70K decks
1%synergy
Utopia Sprawl
13%inclusion882 decks6.70K decks
7%synergy
Paradox Haze
12%inclusion808 decks6.70K decks
12%synergy
Propaganda
11%inclusion757 decks6.70K decks
5%synergy
Wilderness Reclamation
10%inclusion677 decks6.70K decks
1%synergy
Unnatural Growth
10%inclusion645 decks6.70K decks
6%synergy
Impostor Syndrome
9.4%inclusion154 decks1.63K decks
7%synergy
Defense of the Heart
8.8%inclusion592 decks6.70K decks
7%synergy
Moonlit Meditation
8.5%inclusion181 decks2.14K decks
7%synergy
Extravagant Replication
8.1%inclusion539 decks6.70K decks
6%synergy
Burgeoning
7.7%inclusion518 decks6.70K decks
1%synergy
Imprisoned in the Moon
7.7%inclusion515 decks6.70K decks
4%synergy
Asceticism
7.2%inclusion479 decks6.70K decks
4%synergy
Kenrith's Transformation
7.0%inclusion469 decks6.70K decks
3%synergy
Ominous Seas
6.7%inclusion446 decks6.70K decks
2%synergy
Verity Circle
5.5%inclusion366 decks6.70K decks
5%synergy
Dismiss into Dream
5.1%inclusion344 decks6.70K decks
5%synergy
Planeswalkers
Oko, Thief of Crowns
21%inclusion1.40K decks6.70K decks
14%synergy
Kiora, the Crashing Wave
8.0%inclusion533 decks6.70K decks
5%synergy
Utility Lands
Reliquary Tower
61%inclusion4.06K decks6.70K decks
11%synergy
Boseiju, Who Endures
26%inclusion1.71K decks6.70K decks
3%synergy
Yavimaya, Cradle of Growth
24%inclusion1.64K decks6.70K decks
2%synergy
Otawara, Soaring City
21%inclusion1.40K decks6.70K decks
2%synergy
Temple of the False God
20%inclusion1.33K decks6.70K decks
4%synergy
Command Beacon
18%inclusion1.22K decks6.70K decks
14%synergy
Mosswort Bridge
16%inclusion1.10K decks6.70K decks
-1%synergy
Three Tree City
16%inclusion912 decks5.63K decks
11%synergy
Rogue's Passage
15%inclusion998 decks6.70K decks
-7%synergy
Mystic Sanctuary
14%inclusion948 decks6.70K decks
2%synergy
Castle Garenbrig
13%inclusion878 decks6.70K decks
9%synergy
Mistrise Village
13%inclusion429 decks3.35K decks
2%synergy
Alchemist's Refuge
12%inclusion810 decks6.70K decks
-5%synergy
Evendo, Waking Haven
12%inclusion255 decks2.18K decks
6%synergy
Castle Vantress
5.8%inclusion385 decks6.70K decks
-1%synergy
Restless Vinestalk
5.6%inclusion376 decks6.70K decks
0%synergy
Lumbering Falls
5.1%inclusion343 decks6.70K decks
-2%synergy
Mana Artifacts
Sol Ring
92%inclusion6.14K decks6.70K decks
11%synergy
Arcane Signet
78%inclusion5.20K decks6.70K decks
15%synergy
Simic Signet
44%inclusion2.92K decks6.70K decks
12%synergy
Thought Vessel
39%inclusion2.61K decks6.70K decks
19%synergy
Talisman of Curiosity
33%inclusion2.24K decks6.70K decks
12%synergy
Commander's Sphere
11%inclusion766 decks6.70K decks
3%synergy
Fellwar Stone
11%inclusion750 decks6.70K decks
2%synergy
Decanter of Endless Water
7.2%inclusion483 decks6.70K decks
2%synergy
Thran Dynamo
7.0%inclusion470 decks6.70K decks
4%synergy
Mana Vault
7.0%inclusion469 decks6.70K decks
1%synergy
Mind Stone
6.0%inclusion399 decks6.70K decks
2%synergy
Lands
Forest
94%inclusion6.33K decks6.70K decks
-1%synergy
Island
94%inclusion6.32K decks6.70K decks
-1%synergy
Command Tower
87%inclusion5.80K decks6.70K decks
1%synergy
Hinterland Harbor
66%inclusion4.40K decks6.70K decks
6%synergy
Breeding Pool
55%inclusion3.71K decks6.70K decks
9%synergy
Yavimaya Coast
55%inclusion3.67K decks6.70K decks
2%synergy
Rejuvenating Springs
55%inclusion3.66K decks6.70K decks
11%synergy
Dreamroot Cascade
50%inclusion3.34K decks6.70K decks
8%synergy
Simic Growth Chamber
49%inclusion3.31K decks6.70K decks
1%synergy
Flooded Grove
45%inclusion2.98K decks6.70K decks
3%synergy
Temple of Mystery
37%inclusion2.50K decks6.70K decks
-1%synergy
Misty Rainforest
37%inclusion2.45K decks6.70K decks
5%synergy
Vineglimmer Snarl
36%inclusion2.42K decks6.70K decks
-2%synergy
Barkchannel Pathway
35%inclusion2.35K decks6.70K decks
15%synergy
Myriad Landscape
26%inclusion1.76K decks6.70K decks
4%synergy
Exotic Orchard
25%inclusion1.69K decks6.70K decks
1%synergy
Evolving Wilds
23%inclusion1.51K decks6.70K decks
-3%synergy
Waterlogged Grove
22%inclusion1.45K decks6.70K decks
1%synergy
Thornwood Falls
20%inclusion1.34K decks6.70K decks
3%synergy
Hedge Maze
20%inclusion1.31K decks6.63K decks
0%synergy
Tangled Islet
20%inclusion1.32K decks6.70K decks
3%synergy
Willowrush Verge
19%inclusion760 decks4.04K decks
2%synergy
Fabled Passage
17%inclusion1.16K decks6.70K decks
3%synergy
Rimewood Falls
17%inclusion1.16K decks6.70K decks
8%synergy
Terramorphic Expanse
16%inclusion1.06K decks6.70K decks
-4%synergy
Overflowing Basin
15%inclusion959 decks6.41K decks
-4%synergy
Tropical Island
15%inclusion1K decks6.70K decks
1%synergy
Botanical Sanctum
13%inclusion896 decks6.70K decks
1%synergy
Bala Ged Recovery
12%inclusion827 decks6.70K decks
2%synergy
Sink into Stupor
11%inclusion667 decks5.88K decks
0%synergy
Simic Guildgate
10%inclusion687 decks6.70K decks
0%synergy
Path of Ancestry
10%inclusion686 decks6.70K decks
-7%synergy
Snow-Covered Island
9.3%inclusion622 decks6.70K decks
2%synergy
Snow-Covered Forest
9.3%inclusion620 decks6.70K decks
2%synergy
Prismatic Vista
9.2%inclusion617 decks6.70K decks
2%synergy
Glasspool Mimic
8.8%inclusion588 decks6.70K decks
4%synergy
Blighted Woodland
8.2%inclusion549 decks6.70K decks
1%synergy
Flooded Strand
7.9%inclusion531 decks6.70K decks
-3%synergy
Windswept Heath
7.9%inclusion526 decks6.70K decks
-3%synergy
Verdant Catacombs
7.7%inclusion513 decks6.70K decks
-2%synergy
Polluted Delta
7.3%inclusion486 decks6.70K decks
-3%synergy
Littjara Mirrorlake
7.2%inclusion482 decks6.70K decks
3%synergy
Sea Gate Restoration
7.1%inclusion472 decks6.70K decks
2%synergy
Scalding Tarn
6.9%inclusion459 decks6.70K decks
-3%synergy
Wooded Foothills
6.4%inclusion431 decks6.70K decks
-3%synergy
Woodland Stream
6.1%inclusion409 decks6.70K decks
1%synergy
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