Koma, Cosmos Serpent (Commander) - Upgraded

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #299
359decks
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%inclusion14 decks100 decks
9%synergy
Shared Roots
11%inclusion10 decks95 decks
7%synergy
Ember Island Production
5.4%inclusion5 decks92 decks
5%synergy
Badgermole Cub
3.8%inclusion4 decks105 decks
-1%synergy
Wan Shi Tong, Librarian
2.9%inclusion3 decks105 decks
-2%synergy
High Synergy Cards
Adrix and Nev, Twincasters
75%inclusion270 decks359 decks
67%synergy
Whelming Wave
75%inclusion271 decks359 decks
64%synergy
Elemental Bond
68%inclusion243 decks359 decks
62%synergy
Spark Double
65%inclusion233 decks359 decks
55%synergy
Koma, World-Eater
63%inclusion225 decks356 decks
50%synergy
Parallel Lives
56%inclusion200 decks359 decks
50%synergy
Junk Winder
55%inclusion199 decks359 decks
49%synergy
Serpent of Yawning Depths
54%inclusion194 decks359 decks
48%synergy
Irenicus's Vile Duplication
50%inclusion179 decks359 decks
44%synergy
Sakashima of a Thousand Faces
47%inclusion169 decks359 decks
42%synergy
Top Cards
Cultivate
75%inclusion271 decks359 decks
29%synergy
Counterspell
73%inclusion262 decks359 decks
23%synergy
Rampant Growth
69%inclusion249 decks359 decks
29%synergy
Kodama's Reach
67%inclusion241 decks359 decks
31%synergy
Beast Within
57%inclusion206 decks359 decks
7%synergy
Nature's Lore
57%inclusion206 decks359 decks
27%synergy
Farseek
54%inclusion194 decks359 decks
29%synergy
Aesi, Tyrant of Gyre Strait
52%inclusion188 decks359 decks
35%synergy
Heroic Intervention
52%inclusion186 decks359 decks
22%synergy
Growth Spiral
52%inclusion186 decks359 decks
7%synergy
Game Changers
Cyclonic Rift
36%inclusion131 decks359 decks
11%synergy
Rhystic Study
30%inclusion108 decks359 decks
8%synergy
Seedborn Muse
25%inclusion91 decks359 decks
10%synergy
Fierce Guardianship
24%inclusion86 decks359 decks
7%synergy
Worldly Tutor
16%inclusion58 decks359 decks
1%synergy
Consecrated Sphinx
16%inclusion57 decks359 decks
7%synergy
Force of Will
6.4%inclusion23 decks359 decks
-4%synergy
The One Ring
5.0%inclusion18 decks359 decks
-3%synergy
Creatures
Llanowar Elves
46%inclusion165 decks359 decks
18%synergy
Spawning Kraken
45%inclusion161 decks359 decks
37%synergy
Arixmethes, Slumbering Isle
43%inclusion156 decks359 decks
30%synergy
Birds of Paradise
41%inclusion148 decks359 decks
14%synergy
Sakura-Tribe Elder
41%inclusion146 decks359 decks
21%synergy
Tatyova, Benthic Druid
37%inclusion132 decks359 decks
6%synergy
Craterhoof Behemoth
37%inclusion132 decks359 decks
27%synergy
Sakashima the Impostor
36%inclusion131 decks359 decks
34%synergy
Elvish Mystic
35%inclusion126 decks359 decks
11%synergy
Murkfiend Liege
32%inclusion115 decks359 decks
17%synergy
Garruk's Packleader
31%inclusion112 decks359 decks
29%synergy
Hullbreaker Horror
30%inclusion108 decks359 decks
12%synergy
Summon: Leviathan
28%inclusion74 decks268 decks
20%synergy
Eternal Witness
27%inclusion98 decks359 decks
6%synergy
Ohran Frostfang
27%inclusion98 decks359 decks
24%synergy
Roaming Throne
24%inclusion86 decks359 decks
16%synergy
Fyndhorn Elves
22%inclusion80 decks359 decks
7%synergy
Enduring Vitality
22%inclusion79 decks356 decks
15%synergy
Coiling Oracle
21%inclusion75 decks359 decks
8%synergy
Archetype of Imagination
21%inclusion75 decks359 decks
17%synergy
Fanatic of Rhonas
20%inclusion72 decks359 decks
14%synergy
Octomancer
20%inclusion71 decks358 decks
15%synergy
Slinn Voda, the Rising Deep
19%inclusion70 decks359 decks
13%synergy
Esix, Fractal Bloom
18%inclusion63 decks359 decks
14%synergy
Chameleon, Master of Disguise
17%inclusion28 decks166 decks
14%synergy
Scourge of Fleets
16%inclusion56 decks359 decks
8%synergy
Starwinder
15%inclusion31 decks210 decks
8%synergy
Reclamation Sage
14%inclusion52 decks359 decks
0%synergy
Scute Swarm
14%inclusion50 decks359 decks
-7%synergy
Saryth, the Viper's Fang
13%inclusion48 decks359 decks
12%synergy
Curiosity Crafter
13%inclusion47 decks359 decks
10%synergy
Enduring Curiosity
13%inclusion46 decks357 decks
10%synergy
Nadir Kraken
13%inclusion46 decks359 decks
9%synergy
Avenger of Zendikar
11%inclusion41 decks359 decks
-7%synergy
Glasspool Mimic
11%inclusion41 decks359 decks
7%synergy
Uro, Titan of Nature's Wrath
11%inclusion41 decks359 decks
2%synergy
Circle of Dreams Druid
11%inclusion41 decks359 decks
9%synergy
Xolatoyac, the Smiling Flood
11%inclusion40 decks359 decks
4%synergy
Stormtide Leviathan
11%inclusion38 decks359 decks
5%synergy
Toski, Bearer of Secrets
10%inclusion36 decks359 decks
7%synergy
Tireless Provisioner
10%inclusion36 decks359 decks
-5%synergy
Delighted Halfling
10%inclusion36 decks359 decks
-1%synergy
Azusa, Lost but Seeking
10%inclusion35 decks359 decks
-4%synergy
Nezahal, Primal Tide
10%inclusion35 decks359 decks
-1%synergy
Lotus Cobra
9.5%inclusion34 decks359 decks
-4%synergy
Rampaging Baloths
9.2%inclusion33 decks359 decks
-8%synergy
Clever Impersonator
8.4%inclusion30 decks359 decks
4%synergy
Phyrexian Metamorph
8.1%inclusion29 decks359 decks
-1%synergy
Auton Soldier
8.1%inclusion29 decks359 decks
5%synergy
Progenitor Mimic
7.8%inclusion28 decks359 decks
3%synergy
Instants
Double Major
40%inclusion145 decks359 decks
32%synergy
Negate
40%inclusion143 decks359 decks
14%synergy
An Offer You Can't Refuse
38%inclusion135 decks359 decks
15%synergy
Pongify
37%inclusion132 decks359 decks
12%synergy
Second Harvest
35%inclusion127 decks359 decks
29%synergy
Arcane Denial
35%inclusion127 decks359 decks
13%synergy
Return of the Wildspeaker
32%inclusion116 decks359 decks
22%synergy
Mana Drain
31%inclusion112 decks359 decks
15%synergy
Rapid Hybridization
30%inclusion109 decks359 decks
4%synergy
Swan Song
27%inclusion97 decks359 decks
8%synergy
Reality Shift
22%inclusion79 decks359 decks
7%synergy
Simic Charm
19%inclusion69 decks359 decks
11%synergy
Krosan Grip
18%inclusion66 decks359 decks
10%synergy
Nature's Claim
16%inclusion56 decks359 decks
6%synergy
Harrow
15%inclusion55 decks359 decks
3%synergy
Voidslime
15%inclusion55 decks359 decks
10%synergy
Brainstorm
15%inclusion54 decks359 decks
1%synergy
Sink into Stupor
15%inclusion54 decks359 decks
4%synergy
Plasm Capture
15%inclusion53 decks359 decks
11%synergy
Tamiyo's Safekeeping
15%inclusion53 decks359 decks
9%synergy
Planar Genesis
14%inclusion51 decks359 decks
3%synergy
Snakeskin Veil
14%inclusion49 decks359 decks
8%synergy
Stubborn Denial
13%inclusion47 decks359 decks
10%synergy
Aetherize
12%inclusion43 decks359 decks
0%synergy
Return to Nature
11%inclusion40 decks359 decks
6%synergy
Entish Restoration
10%inclusion37 decks359 decks
1%synergy
Tyvar's Stand
10%inclusion35 decks359 decks
7%synergy
Eureka Moment
10%inclusion35 decks359 decks
-1%synergy
Collective Resistance
10%inclusion35 decks359 decks
6%synergy
Perplexing Test
8.9%inclusion32 decks359 decks
4%synergy
Mystic Reflection
8.9%inclusion32 decks359 decks
6%synergy
Chord of Calling
8.9%inclusion32 decks359 decks
1%synergy
Slip Out the Back
8.6%inclusion31 decks359 decks
5%synergy
Disallow
8.4%inclusion30 decks359 decks
7%synergy
Archdruid's Charm
8.4%inclusion30 decks359 decks
2%synergy
Resculpt
8.4%inclusion30 decks359 decks
2%synergy
Decisive Denial
8.1%inclusion29 decks359 decks
3%synergy
Force of Negation
7.8%inclusion28 decks359 decks
-1%synergy
Auroral Procession
7.8%inclusion24 decks308 decks
4%synergy
Fog
7.0%inclusion25 decks359 decks
4%synergy
Sublime Epiphany
7.0%inclusion25 decks359 decks
5%synergy
Lazotep Plating
7.0%inclusion25 decks359 decks
6%synergy
Noxious Revival
6.1%inclusion22 decks359 decks
0%synergy
Pact of Negation
6.1%inclusion22 decks359 decks
-1%synergy
Three Steps Ahead
5.8%inclusion21 decks359 decks
3%synergy
Refute
5.6%inclusion20 decks356 decks
4%synergy
Opt
5.6%inclusion20 decks359 decks
-2%synergy
Joint Exploration
5.3%inclusion19 decks359 decks
-1%synergy
Force of Vigor
5.0%inclusion18 decks359 decks
0%synergy
Strix Serenade
5.0%inclusion18 decks359 decks
1%synergy
Sorceries
Three Visits
48%inclusion174 decks359 decks
25%synergy
Skyshroud Claim
37%inclusion134 decks359 decks
28%synergy
Overwhelming Stampede
26%inclusion94 decks359 decks
14%synergy
Quantum Misalignment
25%inclusion91 decks359 decks
22%synergy
Explore
23%inclusion83 decks359 decks
3%synergy
Migration Path
17%inclusion60 decks359 decks
13%synergy
Rite of Replication
16%inclusion56 decks359 decks
8%synergy
Shamanic Revelation
14%inclusion50 decks359 decks
9%synergy
Bala Ged Recovery
14%inclusion49 decks359 decks
4%synergy
Urban Evolution
13%inclusion45 decks359 decks
3%synergy
Rishkar's Expertise
12%inclusion43 decks359 decks
4%synergy
Ponder
11%inclusion41 decks359 decks
4%synergy
Finale of Devastation
11%inclusion38 decks359 decks
-1%synergy
Harmonize
10%inclusion37 decks359 decks
5%synergy
Triumph of the Hordes
10%inclusion37 decks359 decks
7%synergy
Sea Gate Restoration
10%inclusion35 decks359 decks
4%synergy
Explosive Vegetation
10%inclusion35 decks359 decks
4%synergy
Preordain
8.9%inclusion32 decks359 decks
1%synergy
Curse of the Swine
8.1%inclusion29 decks359 decks
-3%synergy
Distant Melody
8.1%inclusion29 decks359 decks
5%synergy
Search for Tomorrow
7.8%inclusion28 decks359 decks
3%synergy
Regrowth
7.5%inclusion27 decks359 decks
4%synergy
Windfall
7.5%inclusion27 decks359 decks
3%synergy
Into the North
6.7%inclusion24 decks359 decks
6%synergy
Bridgeworks Battle
6.4%inclusion23 decks359 decks
2%synergy
Flare of Cultivation
6.1%inclusion22 decks359 decks
4%synergy
Overrun
5.8%inclusion21 decks359 decks
4%synergy
Tempt with Discovery
5.8%inclusion21 decks359 decks
2%synergy
Raise the Palisade
5.8%inclusion21 decks359 decks
-1%synergy
Ezuri's Predation
5.6%inclusion20 decks359 decks
-2%synergy
Green Sun's Zenith
5.3%inclusion19 decks359 decks
-3%synergy
Broken Bond
5.3%inclusion19 decks359 decks
0%synergy
Preposterous Proportions
5.1%inclusion18 decks356 decks
4%synergy
Circuitous Route
5.0%inclusion18 decks359 decks
3%synergy
Utility Artifacts
Lightning Greaves
43%inclusion155 decks359 decks
21%synergy
Helm of the Host
39%inclusion141 decks359 decks
34%synergy
Swiftfoot Boots
37%inclusion133 decks359 decks
11%synergy
Combine Chrysalis
24%inclusion86 decks359 decks
20%synergy
Mirror Box
17%inclusion61 decks359 decks
14%synergy
Emerald Medallion
14%inclusion52 decks359 decks
12%synergy
Bident of Thassa
11%inclusion38 decks359 decks
3%synergy
Eldrazi Monument
10%inclusion37 decks359 decks
10%synergy
The Great Henge
9.5%inclusion34 decks359 decks
0%synergy
Sapphire Medallion
9.2%inclusion33 decks359 decks
6%synergy
Idol of Oblivion
8.9%inclusion32 decks359 decks
5%synergy
Coat of Arms
6.7%inclusion24 decks359 decks
5%synergy
Skullclamp
5.3%inclusion19 decks359 decks
4%synergy
Banner of Kinship
5.1%inclusion18 decks356 decks
3%synergy
Enchantments
Doubling Season
51%inclusion182 decks359 decks
41%synergy
Tribute to the World Tree
45%inclusion162 decks359 decks
39%synergy
Kindred Discovery
33%inclusion119 decks359 decks
23%synergy
Mystic Remora
28%inclusion99 decks359 decks
12%synergy
Primal Vigor
21%inclusion76 decks359 decks
18%synergy
Cryptolith Rite
19%inclusion67 decks359 decks
16%synergy
Growing Rites of Itlimoc
18%inclusion65 decks359 decks
12%synergy
Garruk's Uprising
17%inclusion60 decks359 decks
0%synergy
Paradox Haze
15%inclusion53 decks359 decks
14%synergy
Wild Growth
14%inclusion52 decks359 decks
6%synergy
Propaganda
13%inclusion48 decks359 decks
7%synergy
Exploration
13%inclusion47 decks359 decks
0%synergy
Beastmaster Ascension
13%inclusion47 decks359 decks
10%synergy
Utopia Sprawl
13%inclusion46 decks359 decks
6%synergy
Wilderness Reclamation
11%inclusion39 decks359 decks
2%synergy
Defense of the Heart
11%inclusion39 decks359 decks
9%synergy
Imprisoned in the Moon
11%inclusion39 decks359 decks
7%synergy
Sylvan Library
10%inclusion37 decks359 decks
1%synergy
Unnatural Growth
10%inclusion37 decks359 decks
7%synergy
Extravagant Replication
10%inclusion36 decks359 decks
8%synergy
Moonlit Meditation
8.6%inclusion18 decks210 decks
7%synergy
Impostor Syndrome
8.4%inclusion14 decks166 decks
6%synergy
Kenrith's Transformation
7.5%inclusion27 decks359 decks
3%synergy
Asceticism
7.5%inclusion27 decks359 decks
4%synergy
Ominous Seas
6.4%inclusion23 decks359 decks
2%synergy
Burgeoning
6.4%inclusion23 decks359 decks
-1%synergy
Opposition
6.1%inclusion22 decks359 decks
6%synergy
Dismiss into Dream
5.8%inclusion21 decks359 decks
6%synergy
Verity Circle
5.6%inclusion20 decks359 decks
5%synergy
Planeswalkers
Oko, Thief of Crowns
21%inclusion77 decks359 decks
14%synergy
Kiora, the Crashing Wave
7.8%inclusion28 decks359 decks
5%synergy
Utility Lands
Reliquary Tower
62%inclusion221 decks359 decks
12%synergy
Temple of the False God
22%inclusion80 decks359 decks
7%synergy
Yavimaya, Cradle of Growth
21%inclusion75 decks359 decks
-1%synergy
Boseiju, Who Endures
19%inclusion70 decks359 decks
-3%synergy
Mosswort Bridge
19%inclusion69 decks359 decks
2%synergy
Otawara, Soaring City
18%inclusion63 decks359 decks
-1%synergy
Command Beacon
17%inclusion62 decks359 decks
13%synergy
Mistrise Village
17%inclusion53 decks308 decks
7%synergy
Mystic Sanctuary
16%inclusion58 decks359 decks
4%synergy
Alchemist's Refuge
16%inclusion57 decks359 decks
-2%synergy
Rogue's Passage
16%inclusion56 decks359 decks
-6%synergy
Castle Garenbrig
15%inclusion53 decks359 decks
10%synergy
Three Tree City
11%inclusion40 decks358 decks
6%synergy
Evendo, Waking Haven
11%inclusion23 decks212 decks
6%synergy
Castle Vantress
7.8%inclusion28 decks359 decks
1%synergy
Lumbering Falls
7.0%inclusion25 decks359 decks
0%synergy
Restless Vinestalk
6.4%inclusion23 decks359 decks
1%synergy
Scavenger Grounds
5.0%inclusion18 decks359 decks
1%synergy
Mana Artifacts
Sol Ring
92%inclusion331 decks359 decks
12%synergy
Arcane Signet
74%inclusion267 decks359 decks
12%synergy
Thought Vessel
36%inclusion131 decks359 decks
16%synergy
Simic Signet
36%inclusion130 decks359 decks
4%synergy
Talisman of Curiosity
29%inclusion105 decks359 decks
8%synergy
Fellwar Stone
13%inclusion46 decks359 decks
3%synergy
Commander's Sphere
9.2%inclusion33 decks359 decks
1%synergy
Decanter of Endless Water
7.0%inclusion25 decks359 decks
2%synergy
Thran Dynamo
6.7%inclusion24 decks359 decks
4%synergy
Mind Stone
5.6%inclusion20 decks359 decks
1%synergy
Lands
Island
94%inclusion338 decks359 decks
-1%synergy
Forest
94%inclusion336 decks359 decks
-2%synergy
Command Tower
91%inclusion325 decks359 decks
5%synergy
Hinterland Harbor
65%inclusion233 decks359 decks
6%synergy
Breeding Pool
58%inclusion208 decks359 decks
12%synergy
Yavimaya Coast
57%inclusion203 decks359 decks
4%synergy
Rejuvenating Springs
55%inclusion197 decks359 decks
11%synergy
Simic Growth Chamber
50%inclusion181 decks359 decks
2%synergy
Flooded Grove
49%inclusion177 decks359 decks
8%synergy
Dreamroot Cascade
48%inclusion171 decks359 decks
6%synergy
Misty Rainforest
39%inclusion141 decks359 decks
8%synergy
Temple of Mystery
38%inclusion135 decks359 decks
-1%synergy
Vineglimmer Snarl
36%inclusion130 decks359 decks
-2%synergy
Barkchannel Pathway
33%inclusion120 decks359 decks
13%synergy
Waterlogged Grove
27%inclusion98 decks359 decks
7%synergy
Exotic Orchard
27%inclusion96 decks359 decks
3%synergy
Evolving Wilds
26%inclusion94 decks359 decks
1%synergy
Hedge Maze
24%inclusion87 decks359 decks
5%synergy
Myriad Landscape
23%inclusion82 decks359 decks
1%synergy
Thornwood Falls
22%inclusion80 decks359 decks
5%synergy
Tangled Islet
21%inclusion74 decks359 decks
4%synergy
Willowrush Verge
21%inclusion72 decks350 decks
4%synergy
Rimewood Falls
19%inclusion70 decks359 decks
10%synergy
Terramorphic Expanse
18%inclusion64 decks359 decks
-2%synergy
Botanical Sanctum
17%inclusion60 decks359 decks
4%synergy
Overflowing Basin
15%inclusion55 decks359 decks
-4%synergy
Sink into Stupor
15%inclusion54 decks359 decks
4%synergy
Fabled Passage
15%inclusion54 decks359 decks
1%synergy
Bala Ged Recovery
14%inclusion49 decks359 decks
4%synergy
Path of Ancestry
13%inclusion48 decks359 decks
-4%synergy
Tropical Island
13%inclusion48 decks359 decks
-1%synergy
Snow-Covered Forest
13%inclusion47 decks359 decks
6%synergy
Snow-Covered Island
13%inclusion47 decks359 decks
6%synergy
Glasspool Mimic
11%inclusion41 decks359 decks
7%synergy
Simic Guildgate
11%inclusion39 decks359 decks
1%synergy
Sea Gate Restoration
10%inclusion35 decks359 decks
4%synergy
Blighted Woodland
8.6%inclusion31 decks359 decks
1%synergy
Littjara Mirrorlake
8.1%inclusion29 decks359 decks
4%synergy
Flooded Strand
7.8%inclusion28 decks359 decks
-3%synergy
Scalding Tarn
7.5%inclusion27 decks359 decks
-2%synergy
Windswept Heath
7.5%inclusion27 decks359 decks
-3%synergy
Verdant Catacombs
7.2%inclusion26 decks359 decks
-2%synergy
Polluted Delta
7.2%inclusion26 decks359 decks
-3%synergy
Prismatic Vista
7.0%inclusion25 decks359 decks
0%synergy
Wooded Foothills
6.4%inclusion23 decks359 decks
-3%synergy
Quandrix Campus
6.4%inclusion23 decks359 decks
0%synergy
Bridgeworks Battle
6.4%inclusion23 decks359 decks
2%synergy
Woodland Stream
5.8%inclusion21 decks359 decks
1%synergy
Disciple of Freyalise
5.3%inclusion19 decks359 decks
1%synergy
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