Koma, Cosmos Serpent (Commander) - Upgraded

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #295
343decks
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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
12%inclusion9 decks73 decks
8%synergy
Shared Roots
8.8%inclusion6 decks68 decks
6%synergy
Ember Island Production
5.9%inclusion4 decks68 decks
5%synergy
Wan Shi Tong, Librarian
3.8%inclusion3 decks78 decks
-1%synergy
Seismic Sense
2.6%inclusion2 decks78 decks
2%synergy
High Synergy Cards
Adrix and Nev, Twincasters
75%inclusion258 decks343 decks
67%synergy
Whelming Wave
76%inclusion259 decks343 decks
64%synergy
Elemental Bond
67%inclusion230 decks343 decks
61%synergy
Spark Double
64%inclusion221 decks343 decks
55%synergy
Koma, World-Eater
64%inclusion217 decks340 decks
51%synergy
Parallel Lives
55%inclusion190 decks343 decks
49%synergy
Junk Winder
55%inclusion188 decks343 decks
48%synergy
Serpent of Yawning Depths
53%inclusion182 decks343 decks
47%synergy
Irenicus's Vile Duplication
50%inclusion171 decks343 decks
44%synergy
Doubling Season
51%inclusion176 decks343 decks
42%synergy
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Cultivate
75%inclusion257 decks343 decks
28%synergy
Counterspell
72%inclusion247 decks343 decks
22%synergy
Rampant Growth
70%inclusion240 decks343 decks
29%synergy
Kodama's Reach
67%inclusion231 decks343 decks
31%synergy
Beast Within
58%inclusion199 decks343 decks
8%synergy
Nature's Lore
56%inclusion193 decks343 decks
26%synergy
Farseek
54%inclusion184 decks343 decks
29%synergy
Aesi, Tyrant of Gyre Strait
53%inclusion181 decks343 decks
36%synergy
Growth Spiral
51%inclusion174 decks343 decks
6%synergy
Heroic Intervention
50%inclusion173 decks343 decks
20%synergy
Game Changers
Cyclonic Rift
37%inclusion128 decks343 decks
11%synergy
Rhystic Study
31%inclusion106 decks343 decks
9%synergy
Seedborn Muse
25%inclusion86 decks343 decks
9%synergy
Fierce Guardianship
23%inclusion80 decks343 decks
6%synergy
Consecrated Sphinx
17%inclusion57 decks343 decks
8%synergy
Worldly Tutor
16%inclusion54 decks343 decks
0%synergy
Force of Will
6.4%inclusion22 decks343 decks
-4%synergy
The One Ring
5.2%inclusion18 decks343 decks
-2%synergy
Creatures
Sakashima of a Thousand Faces
46%inclusion158 decks343 decks
41%synergy
Llanowar Elves
46%inclusion157 decks343 decks
18%synergy
Arixmethes, Slumbering Isle
44%inclusion151 decks343 decks
31%synergy
Spawning Kraken
44%inclusion151 decks343 decks
37%synergy
Sakura-Tribe Elder
41%inclusion142 decks343 decks
22%synergy
Birds of Paradise
41%inclusion140 decks343 decks
13%synergy
Tatyova, Benthic Druid
38%inclusion129 decks343 decks
6%synergy
Craterhoof Behemoth
38%inclusion129 decks343 decks
28%synergy
Elvish Mystic
35%inclusion121 decks343 decks
11%synergy
Sakashima the Impostor
35%inclusion120 decks343 decks
32%synergy
Murkfiend Liege
32%inclusion111 decks343 decks
18%synergy
Garruk's Packleader
32%inclusion109 decks343 decks
29%synergy
Hullbreaker Horror
31%inclusion105 decks343 decks
13%synergy
Eternal Witness
28%inclusion96 decks343 decks
7%synergy
Ohran Frostfang
28%inclusion95 decks343 decks
24%synergy
Summon: Leviathan
27%inclusion67 decks250 decks
20%synergy
Roaming Throne
24%inclusion82 decks343 decks
16%synergy
Enduring Vitality
22%inclusion76 decks340 decks
15%synergy
Coiling Oracle
22%inclusion76 decks343 decks
9%synergy
Fyndhorn Elves
22%inclusion75 decks343 decks
6%synergy
Archetype of Imagination
21%inclusion72 decks343 decks
17%synergy
Fanatic of Rhonas
20%inclusion70 decks343 decks
15%synergy
Octomancer
20%inclusion68 decks342 decks
15%synergy
Slinn Voda, the Rising Deep
20%inclusion67 decks343 decks
13%synergy
Esix, Fractal Bloom
18%inclusion61 decks343 decks
14%synergy
Chameleon, Master of Disguise
17%inclusion24 decks143 decks
14%synergy
Reclamation Sage
15%inclusion53 decks343 decks
1%synergy
Scourge of Fleets
15%inclusion53 decks343 decks
7%synergy
Scute Swarm
14%inclusion48 decks343 decks
-7%synergy
Starwinder
14%inclusion26 decks191 decks
7%synergy
Saryth, the Viper's Fang
13%inclusion46 decks343 decks
12%synergy
Enduring Curiosity
13%inclusion45 decks341 decks
10%synergy
Curiosity Crafter
13%inclusion45 decks343 decks
10%synergy
Nadir Kraken
13%inclusion43 decks343 decks
8%synergy
Circle of Dreams Druid
12%inclusion41 decks343 decks
10%synergy
Glasspool Mimic
12%inclusion41 decks343 decks
8%synergy
Uro, Titan of Nature's Wrath
12%inclusion41 decks343 decks
2%synergy
Avenger of Zendikar
12%inclusion40 decks343 decks
-6%synergy
Stormtide Leviathan
11%inclusion38 decks343 decks
5%synergy
Xolatoyac, the Smiling Flood
11%inclusion38 decks343 decks
4%synergy
Azusa, Lost but Seeking
10%inclusion36 decks343 decks
-4%synergy
Toski, Bearer of Secrets
10%inclusion36 decks343 decks
7%synergy
Tireless Provisioner
10%inclusion35 decks343 decks
-5%synergy
Lotus Cobra
10%inclusion34 decks343 decks
-4%synergy
Nezahal, Primal Tide
10%inclusion33 decks343 decks
-1%synergy
Delighted Halfling
10%inclusion33 decks343 decks
-2%synergy
Rampaging Baloths
9.0%inclusion31 decks343 decks
-8%synergy
Phyrexian Metamorph
8.5%inclusion29 decks343 decks
0%synergy
Clever Impersonator
8.5%inclusion29 decks343 decks
4%synergy
Auton Soldier
8.2%inclusion28 decks343 decks
6%synergy
Instants
Negate
41%inclusion141 decks343 decks
15%synergy
Double Major
40%inclusion136 decks343 decks
31%synergy
An Offer You Can't Refuse
38%inclusion131 decks343 decks
15%synergy
Pongify
36%inclusion124 decks343 decks
11%synergy
Arcane Denial
36%inclusion123 decks343 decks
13%synergy
Second Harvest
35%inclusion119 decks343 decks
28%synergy
Return of the Wildspeaker
33%inclusion113 decks343 decks
23%synergy
Mana Drain
31%inclusion107 decks343 decks
15%synergy
Rapid Hybridization
29%inclusion98 decks343 decks
2%synergy
Swan Song
27%inclusion92 decks343 decks
8%synergy
Reality Shift
22%inclusion75 decks343 decks
7%synergy
Simic Charm
19%inclusion65 decks343 decks
11%synergy
Krosan Grip
18%inclusion62 decks343 decks
10%synergy
Brainstorm
15%inclusion53 decks343 decks
1%synergy
Sink into Stupor
15%inclusion52 decks343 decks
4%synergy
Voidslime
15%inclusion51 decks343 decks
10%synergy
Harrow
15%inclusion50 decks343 decks
3%synergy
Planar Genesis
15%inclusion50 decks343 decks
4%synergy
Nature's Claim
14%inclusion49 decks343 decks
4%synergy
Plasm Capture
14%inclusion49 decks343 decks
11%synergy
Tamiyo's Safekeeping
14%inclusion48 decks343 decks
8%synergy
Snakeskin Veil
13%inclusion46 decks343 decks
8%synergy
Stubborn Denial
12%inclusion42 decks343 decks
10%synergy
Aetherize
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0%synergy
Entish Restoration
10%inclusion35 decks343 decks
1%synergy
Return to Nature
10%inclusion34 decks343 decks
4%synergy
Eureka Moment
10%inclusion33 decks343 decks
-1%synergy
Collective Resistance
10%inclusion33 decks343 decks
6%synergy
Mystic Reflection
9.0%inclusion31 decks343 decks
6%synergy
Perplexing Test
9.0%inclusion31 decks343 decks
4%synergy
Resculpt
8.7%inclusion30 decks343 decks
3%synergy
Tyvar's Stand
8.7%inclusion30 decks343 decks
6%synergy
Decisive Denial
8.5%inclusion29 decks343 decks
3%synergy
Archdruid's Charm
8.5%inclusion29 decks343 decks
2%synergy
Chord of Calling
8.5%inclusion29 decks343 decks
1%synergy
Auroral Procession
8.2%inclusion24 decks291 decks
5%synergy
Slip Out the Back
8.2%inclusion28 decks343 decks
4%synergy
Force of Negation
7.9%inclusion27 decks343 decks
-1%synergy
Fog
7.6%inclusion26 decks343 decks
4%synergy
Disallow
7.6%inclusion26 decks343 decks
6%synergy
Sublime Epiphany
7.3%inclusion25 decks343 decks
5%synergy
Lazotep Plating
6.7%inclusion23 decks343 decks
6%synergy
Pact of Negation
6.1%inclusion21 decks343 decks
-1%synergy
Noxious Revival
6.1%inclusion21 decks343 decks
0%synergy
Three Steps Ahead
5.8%inclusion20 decks343 decks
3%synergy
Refute
5.6%inclusion19 decks340 decks
3%synergy
Strix Serenade
5.5%inclusion19 decks343 decks
2%synergy
Force of Vigor
5.2%inclusion18 decks343 decks
1%synergy
Sorceries
Three Visits
48%inclusion166 decks343 decks
25%synergy
Skyshroud Claim
37%inclusion127 decks343 decks
28%synergy
Quantum Misalignment
26%inclusion90 decks343 decks
23%synergy
Overwhelming Stampede
26%inclusion90 decks343 decks
14%synergy
Explore
24%inclusion81 decks343 decks
3%synergy
Migration Path
16%inclusion55 decks343 decks
13%synergy
Rite of Replication
15%inclusion52 decks343 decks
8%synergy
Shamanic Revelation
14%inclusion49 decks343 decks
9%synergy
Bala Ged Recovery
14%inclusion47 decks343 decks
4%synergy
Urban Evolution
13%inclusion43 decks343 decks
3%synergy
Rishkar's Expertise
12%inclusion40 decks343 decks
3%synergy
Ponder
11%inclusion39 decks343 decks
4%synergy
Finale of Devastation
11%inclusion38 decks343 decks
-1%synergy
Harmonize
10%inclusion36 decks343 decks
5%synergy
Triumph of the Hordes
10%inclusion35 decks343 decks
7%synergy
Explosive Vegetation
10%inclusion35 decks343 decks
4%synergy
Sea Gate Restoration
10%inclusion34 decks343 decks
4%synergy
Preordain
9.3%inclusion32 decks343 decks
1%synergy
Distant Melody
8.2%inclusion28 decks343 decks
5%synergy
Curse of the Swine
7.9%inclusion27 decks343 decks
-3%synergy
Search for Tomorrow
7.9%inclusion27 decks343 decks
3%synergy
Windfall
7.3%inclusion25 decks343 decks
3%synergy
Regrowth
7.0%inclusion24 decks343 decks
3%synergy
Into the North
6.7%inclusion23 decks343 decks
6%synergy
Tempt with Discovery
6.1%inclusion21 decks343 decks
2%synergy
Overrun
6.1%inclusion21 decks343 decks
4%synergy
Bridgeworks Battle
5.8%inclusion20 decks343 decks
1%synergy
Raise the Palisade
5.8%inclusion20 decks343 decks
-1%synergy
Ezuri's Predation
5.8%inclusion20 decks343 decks
-2%synergy
Flare of Cultivation
5.5%inclusion19 decks343 decks
3%synergy
Preposterous Proportions
5.3%inclusion18 decks340 decks
4%synergy
Green Sun's Zenith
5.2%inclusion18 decks343 decks
-4%synergy
Circuitous Route
5.2%inclusion18 decks343 decks
3%synergy
Nature's Rhythm
5.2%inclusion15 decks289 decks
-1%synergy
Utility Artifacts
Lightning Greaves
43%inclusion148 decks343 decks
21%synergy
Helm of the Host
40%inclusion138 decks343 decks
35%synergy
Swiftfoot Boots
37%inclusion127 decks343 decks
11%synergy
Combine Chrysalis
25%inclusion85 decks343 decks
20%synergy
Mirror Box
16%inclusion55 decks343 decks
13%synergy
Emerald Medallion
14%inclusion47 decks343 decks
11%synergy
Bident of Thassa
10%inclusion36 decks343 decks
3%synergy
Eldrazi Monument
10%inclusion34 decks343 decks
9%synergy
The Great Henge
10%inclusion34 decks343 decks
1%synergy
Idol of Oblivion
10%inclusion33 decks343 decks
6%synergy
Sapphire Medallion
8.7%inclusion30 decks343 decks
6%synergy
Coat of Arms
6.7%inclusion23 decks343 decks
5%synergy
Skullclamp
5.2%inclusion18 decks343 decks
4%synergy
Enchantments
Tribute to the World Tree
45%inclusion155 decks343 decks
39%synergy
Kindred Discovery
33%inclusion114 decks343 decks
23%synergy
Mystic Remora
26%inclusion90 decks343 decks
11%synergy
Primal Vigor
20%inclusion70 decks343 decks
17%synergy
Growing Rites of Itlimoc
18%inclusion62 decks343 decks
12%synergy
Cryptolith Rite
18%inclusion61 decks343 decks
15%synergy
Garruk's Uprising
16%inclusion56 decks343 decks
0%synergy
Paradox Haze
15%inclusion50 decks343 decks
14%synergy
Wild Growth
14%inclusion49 decks343 decks
6%synergy
Exploration
14%inclusion47 decks343 decks
0%synergy
Beastmaster Ascension
13%inclusion46 decks343 decks
10%synergy
Propaganda
13%inclusion45 decks343 decks
6%synergy
Utopia Sprawl
13%inclusion44 decks343 decks
6%synergy
Imprisoned in the Moon
11%inclusion39 decks343 decks
7%synergy
Wilderness Reclamation
11%inclusion38 decks343 decks
2%synergy
Defense of the Heart
11%inclusion38 decks343 decks
9%synergy
Sylvan Library
11%inclusion37 decks343 decks
2%synergy
Unnatural Growth
10%inclusion35 decks343 decks
7%synergy
Extravagant Replication
10%inclusion33 decks343 decks
7%synergy
Moonlit Meditation
8.4%inclusion16 decks191 decks
7%synergy
Kenrith's Transformation
8.2%inclusion28 decks343 decks
4%synergy
Asceticism
7.3%inclusion25 decks343 decks
4%synergy
Impostor Syndrome
7.0%inclusion10 decks143 decks
5%synergy
Burgeoning
6.7%inclusion23 decks343 decks
0%synergy
Ominous Seas
6.4%inclusion22 decks343 decks
2%synergy
Opposition
6.4%inclusion22 decks343 decks
6%synergy
Verity Circle
5.5%inclusion19 decks343 decks
5%synergy
Dismiss into Dream
5.5%inclusion19 decks343 decks
5%synergy
Planeswalkers
Oko, Thief of Crowns
22%inclusion76 decks343 decks
15%synergy
Kiora, the Crashing Wave
7.6%inclusion26 decks343 decks
5%synergy
Utility Lands
Reliquary Tower
61%inclusion209 decks343 decks
11%synergy
Temple of the False God
22%inclusion75 decks343 decks
6%synergy
Yavimaya, Cradle of Growth
21%inclusion72 decks343 decks
-1%synergy
Boseiju, Who Endures
20%inclusion70 decks343 decks
-2%synergy
Mosswort Bridge
20%inclusion68 decks343 decks
2%synergy
Otawara, Soaring City
17%inclusion60 decks343 decks
-1%synergy
Mistrise Village
17%inclusion49 decks291 decks
6%synergy
Command Beacon
17%inclusion57 decks343 decks
13%synergy
Mystic Sanctuary
16%inclusion54 decks343 decks
3%synergy
Alchemist's Refuge
15%inclusion53 decks343 decks
-2%synergy
Rogue's Passage
15%inclusion51 decks343 decks
-7%synergy
Castle Garenbrig
13%inclusion43 decks343 decks
8%synergy
Three Tree City
12%inclusion40 decks342 decks
7%synergy
Evendo, Waking Haven
11%inclusion21 decks193 decks
6%synergy
Castle Vantress
7.9%inclusion27 decks343 decks
1%synergy
Lumbering Falls
7.0%inclusion24 decks343 decks
0%synergy
Restless Vinestalk
6.4%inclusion22 decks343 decks
1%synergy
Scavenger Grounds
5.2%inclusion18 decks343 decks
1%synergy
Mana Artifacts
Sol Ring
92%inclusion315 decks343 decks
11%synergy
Arcane Signet
74%inclusion253 decks343 decks
11%synergy
Simic Signet
36%inclusion124 decks343 decks
4%synergy
Thought Vessel
36%inclusion124 decks343 decks
16%synergy
Talisman of Curiosity
27%inclusion93 decks343 decks
6%synergy
Fellwar Stone
12%inclusion40 decks343 decks
2%synergy
Commander's Sphere
10%inclusion33 decks343 decks
1%synergy
Thran Dynamo
6.7%inclusion23 decks343 decks
4%synergy
Decanter of Endless Water
6.7%inclusion23 decks343 decks
1%synergy
Mind Stone
6.1%inclusion21 decks343 decks
2%synergy
Lands
Island
94%inclusion324 decks343 decks
-1%synergy
Forest
94%inclusion322 decks343 decks
-1%synergy
Command Tower
91%inclusion312 decks343 decks
6%synergy
Hinterland Harbor
64%inclusion221 decks343 decks
5%synergy
Breeding Pool
57%inclusion195 decks343 decks
11%synergy
Yavimaya Coast
56%inclusion192 decks343 decks
4%synergy
Rejuvenating Springs
54%inclusion186 decks343 decks
10%synergy
Simic Growth Chamber
50%inclusion172 decks343 decks
2%synergy
Flooded Grove
49%inclusion167 decks343 decks
8%synergy
Dreamroot Cascade
47%inclusion160 decks343 decks
5%synergy
Misty Rainforest
39%inclusion135 decks343 decks
8%synergy
Temple of Mystery
39%inclusion133 decks343 decks
0%synergy
Vineglimmer Snarl
36%inclusion125 decks343 decks
-2%synergy
Barkchannel Pathway
33%inclusion113 decks343 decks
13%synergy
Exotic Orchard
27%inclusion93 decks343 decks
3%synergy
Evolving Wilds
27%inclusion91 decks343 decks
1%synergy
Waterlogged Grove
26%inclusion88 decks343 decks
5%synergy
Hedge Maze
24%inclusion83 decks343 decks
5%synergy
Myriad Landscape
24%inclusion82 decks343 decks
2%synergy
Thornwood Falls
22%inclusion77 decks343 decks
5%synergy
Willowrush Verge
21%inclusion69 decks334 decks
4%synergy
Tangled Islet
20%inclusion70 decks343 decks
4%synergy
Rimewood Falls
20%inclusion67 decks343 decks
10%synergy
Terramorphic Expanse
18%inclusion63 decks343 decks
-1%synergy
Botanical Sanctum
17%inclusion57 decks343 decks
4%synergy
Fabled Passage
15%inclusion53 decks343 decks
1%synergy
Sink into Stupor
15%inclusion52 decks343 decks
4%synergy
Overflowing Basin
15%inclusion51 decks343 decks
-4%synergy
Tropical Island
14%inclusion48 decks343 decks
0%synergy
Bala Ged Recovery
14%inclusion47 decks343 decks
4%synergy
Snow-Covered Forest
13%inclusion44 decks343 decks
6%synergy
Path of Ancestry
13%inclusion44 decks343 decks
-4%synergy
Snow-Covered Island
13%inclusion44 decks343 decks
6%synergy
Glasspool Mimic
12%inclusion41 decks343 decks
8%synergy
Simic Guildgate
11%inclusion38 decks343 decks
1%synergy
Sea Gate Restoration
10%inclusion34 decks343 decks
4%synergy
Blighted Woodland
8.7%inclusion30 decks343 decks
1%synergy
Littjara Mirrorlake
7.9%inclusion27 decks343 decks
4%synergy
Scalding Tarn
7.9%inclusion27 decks343 decks
-2%synergy
Flooded Strand
7.9%inclusion27 decks343 decks
-3%synergy
Windswept Heath
7.6%inclusion26 decks343 decks
-3%synergy
Verdant Catacombs
7.6%inclusion26 decks343 decks
-2%synergy
Polluted Delta
7.6%inclusion26 decks343 decks
-3%synergy
Prismatic Vista
7.0%inclusion24 decks343 decks
0%synergy
Quandrix Campus
6.7%inclusion23 decks343 decks
0%synergy
Wooded Foothills
6.7%inclusion23 decks343 decks
-3%synergy
Woodland Stream
6.4%inclusion22 decks343 decks
1%synergy
Bridgeworks Battle
5.8%inclusion20 decks343 decks
1%synergy
Disciple of Freyalise
5.5%inclusion19 decks343 decks
1%synergy
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