Koma, Cosmos Serpent (Commander) - Upgraded

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #298
354decks
As CommanderAs CardAverage DeckDecks
Bracket
All12345
Budget
Any$$$$
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.
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
New Cards
High Synergy Cards
Top Cards
Game Changers
Creatures
Instants
Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
Back to Top
The Unagi of Kyoshi Island
11%inclusion10 decks92 decks
6%synergy
Shared Roots
9.2%inclusion8 decks87 decks
6%synergy
Ember Island Production
4.6%inclusion4 decks87 decks
4%synergy
Badgermole Cub
4.1%inclusion4 decks97 decks
0%synergy
Wan Shi Tong, Librarian
3.1%inclusion3 decks97 decks
-2%synergy
High Synergy Cards
Adrix and Nev, Twincasters
75%inclusion264 decks354 decks
66%synergy
Whelming Wave
76%inclusion269 decks354 decks
65%synergy
Elemental Bond
68%inclusion240 decks354 decks
62%synergy
Spark Double
65%inclusion229 decks354 decks
55%synergy
Koma, World-Eater
64%inclusion223 decks351 decks
50%synergy
Parallel Lives
56%inclusion197 decks354 decks
50%synergy
Junk Winder
55%inclusion194 decks354 decks
48%synergy
Serpent of Yawning Depths
54%inclusion191 decks354 decks
48%synergy
Irenicus's Vile Duplication
49%inclusion175 decks354 decks
43%synergy
Doubling Season
51%inclusion181 decks354 decks
42%synergy
Top Cards
Cultivate
75%inclusion267 decks354 decks
29%synergy
Counterspell
73%inclusion258 decks354 decks
23%synergy
Rampant Growth
70%inclusion247 decks354 decks
29%synergy
Kodama's Reach
68%inclusion240 decks354 decks
31%synergy
Beast Within
58%inclusion205 decks354 decks
8%synergy
Nature's Lore
58%inclusion204 decks354 decks
27%synergy
Farseek
54%inclusion191 decks354 decks
29%synergy
Aesi, Tyrant of Gyre Strait
53%inclusion188 decks354 decks
36%synergy
Heroic Intervention
51%inclusion182 decks354 decks
21%synergy
Growth Spiral
51%inclusion181 decks354 decks
7%synergy
Game Changers
Cyclonic Rift
38%inclusion133 decks354 decks
12%synergy
Rhystic Study
30%inclusion107 decks354 decks
8%synergy
Seedborn Muse
25%inclusion90 decks354 decks
10%synergy
Fierce Guardianship
24%inclusion85 decks354 decks
7%synergy
Worldly Tutor
16%inclusion57 decks354 decks
1%synergy
Consecrated Sphinx
16%inclusion56 decks354 decks
7%synergy
Force of Will
6.5%inclusion23 decks354 decks
-4%synergy
The One Ring
5.1%inclusion18 decks354 decks
-3%synergy
Creatures
Sakashima of a Thousand Faces
47%inclusion165 decks354 decks
42%synergy
Llanowar Elves
46%inclusion162 decks354 decks
18%synergy
Spawning Kraken
45%inclusion158 decks354 decks
37%synergy
Arixmethes, Slumbering Isle
44%inclusion155 decks354 decks
30%synergy
Birds of Paradise
41%inclusion145 decks354 decks
13%synergy
Sakura-Tribe Elder
41%inclusion145 decks354 decks
22%synergy
Craterhoof Behemoth
37%inclusion132 decks354 decks
28%synergy
Tatyova, Benthic Druid
37%inclusion131 decks354 decks
6%synergy
Sakashima the Impostor
36%inclusion127 decks354 decks
33%synergy
Elvish Mystic
35%inclusion124 decks354 decks
11%synergy
Murkfiend Liege
32%inclusion112 decks354 decks
17%synergy
Garruk's Packleader
31%inclusion111 decks354 decks
29%synergy
Hullbreaker Horror
30%inclusion107 decks354 decks
13%synergy
Eternal Witness
28%inclusion98 decks354 decks
7%synergy
Ohran Frostfang
27%inclusion96 decks354 decks
23%synergy
Summon: Leviathan
27%inclusion70 decks262 decks
20%synergy
Roaming Throne
24%inclusion84 decks354 decks
16%synergy
Fyndhorn Elves
22%inclusion78 decks354 decks
6%synergy
Enduring Vitality
22%inclusion77 decks351 decks
15%synergy
Coiling Oracle
21%inclusion75 decks354 decks
8%synergy
Archetype of Imagination
21%inclusion75 decks354 decks
17%synergy
Fanatic of Rhonas
21%inclusion73 decks354 decks
15%synergy
Octomancer
20%inclusion70 decks353 decks
15%synergy
Slinn Voda, the Rising Deep
20%inclusion70 decks354 decks
13%synergy
Esix, Fractal Bloom
18%inclusion62 decks354 decks
14%synergy
Chameleon, Master of Disguise
17%inclusion27 decks159 decks
15%synergy
Scourge of Fleets
15%inclusion54 decks354 decks
7%synergy
Reclamation Sage
15%inclusion53 decks354 decks
1%synergy
Starwinder
14%inclusion29 decks204 decks
8%synergy
Scute Swarm
14%inclusion49 decks354 decks
-7%synergy
Saryth, the Viper's Fang
14%inclusion48 decks354 decks
12%synergy
Enduring Curiosity
13%inclusion46 decks352 decks
10%synergy
Curiosity Crafter
13%inclusion45 decks354 decks
9%synergy
Nadir Kraken
13%inclusion45 decks354 decks
9%synergy
Glasspool Mimic
12%inclusion41 decks354 decks
7%synergy
Uro, Titan of Nature's Wrath
12%inclusion41 decks354 decks
2%synergy
Xolatoyac, the Smiling Flood
11%inclusion40 decks354 decks
4%synergy
Avenger of Zendikar
11%inclusion40 decks354 decks
-7%synergy
Circle of Dreams Druid
11%inclusion40 decks354 decks
9%synergy
Stormtide Leviathan
11%inclusion38 decks354 decks
5%synergy
Toski, Bearer of Secrets
10%inclusion36 decks354 decks
7%synergy
Tireless Provisioner
10%inclusion36 decks354 decks
-5%synergy
Delighted Halfling
10%inclusion36 decks354 decks
-1%synergy
Azusa, Lost but Seeking
10%inclusion36 decks354 decks
-4%synergy
Lotus Cobra
10%inclusion34 decks354 decks
-4%synergy
Nezahal, Primal Tide
10%inclusion34 decks354 decks
-1%synergy
Rampaging Baloths
9.0%inclusion32 decks354 decks
-8%synergy
Phyrexian Metamorph
8.5%inclusion30 decks354 decks
0%synergy
Clever Impersonator
8.5%inclusion30 decks354 decks
4%synergy
Auton Soldier
8.2%inclusion29 decks354 decks
6%synergy
Instants
Negate
40%inclusion143 decks354 decks
14%synergy
Double Major
40%inclusion142 decks354 decks
32%synergy
An Offer You Can't Refuse
38%inclusion135 decks354 decks
15%synergy
Pongify
37%inclusion131 decks354 decks
12%synergy
Arcane Denial
35%inclusion125 decks354 decks
13%synergy
Second Harvest
35%inclusion123 decks354 decks
28%synergy
Return of the Wildspeaker
32%inclusion113 decks354 decks
22%synergy
Mana Drain
32%inclusion112 decks354 decks
16%synergy
Rapid Hybridization
30%inclusion107 decks354 decks
4%synergy
Swan Song
27%inclusion96 decks354 decks
8%synergy
Reality Shift
22%inclusion77 decks354 decks
7%synergy
Simic Charm
19%inclusion68 decks354 decks
11%synergy
Krosan Grip
19%inclusion66 decks354 decks
11%synergy
Voidslime
15%inclusion54 decks354 decks
10%synergy
Brainstorm
15%inclusion54 decks354 decks
1%synergy
Sink into Stupor
15%inclusion54 decks354 decks
4%synergy
Plasm Capture
15%inclusion53 decks354 decks
11%synergy
Harrow
15%inclusion53 decks354 decks
3%synergy
Nature's Claim
15%inclusion53 decks354 decks
5%synergy
Planar Genesis
14%inclusion51 decks354 decks
4%synergy
Tamiyo's Safekeeping
14%inclusion51 decks354 decks
9%synergy
Snakeskin Veil
14%inclusion49 decks354 decks
8%synergy
Stubborn Denial
13%inclusion45 decks354 decks
10%synergy
Aetherize
12%inclusion43 decks354 decks
0%synergy
Return to Nature
11%inclusion38 decks354 decks
5%synergy
Entish Restoration
10%inclusion37 decks354 decks
1%synergy
Collective Resistance
10%inclusion36 decks354 decks
7%synergy
Eureka Moment
10%inclusion35 decks354 decks
-1%synergy
Tyvar's Stand
10%inclusion35 decks354 decks
7%synergy
Chord of Calling
9.0%inclusion32 decks354 decks
1%synergy
Mystic Reflection
9.0%inclusion32 decks354 decks
6%synergy
Perplexing Test
9.0%inclusion32 decks354 decks
4%synergy
Resculpt
8.5%inclusion30 decks354 decks
2%synergy
Slip Out the Back
8.5%inclusion30 decks354 decks
5%synergy
Decisive Denial
8.2%inclusion29 decks354 decks
3%synergy
Archdruid's Charm
8.2%inclusion29 decks354 decks
2%synergy
Disallow
8.2%inclusion29 decks354 decks
6%synergy
Auroral Procession
7.9%inclusion24 decks303 decks
4%synergy
Force of Negation
7.9%inclusion28 decks354 decks
-1%synergy
Fog
7.3%inclusion26 decks354 decks
4%synergy
Sublime Epiphany
7.1%inclusion25 decks354 decks
5%synergy
Lazotep Plating
7.1%inclusion25 decks354 decks
6%synergy
Noxious Revival
6.2%inclusion22 decks354 decks
0%synergy
Pact of Negation
6.2%inclusion22 decks354 decks
-1%synergy
Three Steps Ahead
5.9%inclusion21 decks354 decks
3%synergy
Opt
5.6%inclusion20 decks354 decks
-2%synergy
Refute
5.4%inclusion19 decks351 decks
3%synergy
Force of Vigor
5.1%inclusion18 decks354 decks
0%synergy
Joint Exploration
5.1%inclusion18 decks354 decks
-1%synergy
Strix Serenade
5.1%inclusion18 decks354 decks
1%synergy
Sorceries
Three Visits
49%inclusion173 decks354 decks
26%synergy
Skyshroud Claim
38%inclusion134 decks354 decks
29%synergy
Overwhelming Stampede
26%inclusion93 decks354 decks
14%synergy
Quantum Misalignment
25%inclusion90 decks354 decks
23%synergy
Explore
23%inclusion81 decks354 decks
3%synergy
Migration Path
16%inclusion58 decks354 decks
13%synergy
Rite of Replication
15%inclusion54 decks354 decks
8%synergy
Shamanic Revelation
14%inclusion50 decks354 decks
9%synergy
Bala Ged Recovery
14%inclusion49 decks354 decks
4%synergy
Urban Evolution
12%inclusion44 decks354 decks
3%synergy
Ponder
12%inclusion41 decks354 decks
4%synergy
Rishkar's Expertise
12%inclusion41 decks354 decks
3%synergy
Finale of Devastation
11%inclusion39 decks354 decks
-1%synergy
Triumph of the Hordes
10%inclusion37 decks354 decks
7%synergy
Harmonize
10%inclusion37 decks354 decks
5%synergy
Sea Gate Restoration
10%inclusion36 decks354 decks
5%synergy
Explosive Vegetation
10%inclusion35 decks354 decks
4%synergy
Preordain
9.0%inclusion32 decks354 decks
1%synergy
Distant Melody
8.2%inclusion29 decks354 decks
5%synergy
Curse of the Swine
7.9%inclusion28 decks354 decks
-3%synergy
Search for Tomorrow
7.9%inclusion28 decks354 decks
3%synergy
Windfall
7.6%inclusion27 decks354 decks
3%synergy
Regrowth
7.3%inclusion26 decks354 decks
4%synergy
Into the North
6.8%inclusion24 decks354 decks
6%synergy
Bridgeworks Battle
6.5%inclusion23 decks354 decks
2%synergy
Overrun
5.9%inclusion21 decks354 decks
4%synergy
Flare of Cultivation
5.9%inclusion21 decks354 decks
4%synergy
Raise the Palisade
5.6%inclusion20 decks354 decks
-1%synergy
Tempt with Discovery
5.6%inclusion20 decks354 decks
2%synergy
Ezuri's Predation
5.6%inclusion20 decks354 decks
-2%synergy
Green Sun's Zenith
5.4%inclusion19 decks354 decks
-3%synergy
Preposterous Proportions
5.1%inclusion18 decks351 decks
4%synergy
Circuitous Route
5.1%inclusion18 decks354 decks
3%synergy
Utility Artifacts
Lightning Greaves
44%inclusion155 decks354 decks
22%synergy
Helm of the Host
39%inclusion139 decks354 decks
34%synergy
Swiftfoot Boots
36%inclusion129 decks354 decks
11%synergy
Combine Chrysalis
24%inclusion86 decks354 decks
20%synergy
Mirror Box
16%inclusion58 decks354 decks
13%synergy
Emerald Medallion
14%inclusion51 decks354 decks
11%synergy
Bident of Thassa
10%inclusion37 decks354 decks
3%synergy
The Great Henge
10%inclusion34 decks354 decks
1%synergy
Eldrazi Monument
10%inclusion34 decks354 decks
9%synergy
Idol of Oblivion
9.0%inclusion32 decks354 decks
6%synergy
Sapphire Medallion
8.8%inclusion31 decks354 decks
6%synergy
Coat of Arms
6.8%inclusion24 decks354 decks
5%synergy
Skullclamp
5.1%inclusion18 decks354 decks
4%synergy
Enchantments
Tribute to the World Tree
45%inclusion161 decks354 decks
39%synergy
Kindred Discovery
34%inclusion119 decks354 decks
24%synergy
Mystic Remora
27%inclusion96 decks354 decks
12%synergy
Primal Vigor
21%inclusion74 decks354 decks
18%synergy
Cryptolith Rite
18%inclusion64 decks354 decks
15%synergy
Growing Rites of Itlimoc
18%inclusion63 decks354 decks
12%synergy
Garruk's Uprising
16%inclusion58 decks354 decks
0%synergy
Paradox Haze
14%inclusion51 decks354 decks
14%synergy
Wild Growth
14%inclusion50 decks354 decks
5%synergy
Exploration
13%inclusion47 decks354 decks
0%synergy
Propaganda
13%inclusion47 decks354 decks
7%synergy
Beastmaster Ascension
13%inclusion46 decks354 decks
10%synergy
Utopia Sprawl
13%inclusion45 decks354 decks
6%synergy
Defense of the Heart
11%inclusion39 decks354 decks
9%synergy
Imprisoned in the Moon
11%inclusion39 decks354 decks
7%synergy
Wilderness Reclamation
11%inclusion38 decks354 decks
2%synergy
Sylvan Library
10%inclusion37 decks354 decks
1%synergy
Extravagant Replication
10%inclusion35 decks354 decks
8%synergy
Unnatural Growth
10%inclusion35 decks354 decks
7%synergy
Moonlit Meditation
8.3%inclusion17 decks204 decks
7%synergy
Kenrith's Transformation
8.2%inclusion29 decks354 decks
4%synergy
Impostor Syndrome
7.5%inclusion12 decks159 decks
5%synergy
Asceticism
7.3%inclusion26 decks354 decks
4%synergy
Ominous Seas
6.8%inclusion24 decks354 decks
2%synergy
Burgeoning
6.5%inclusion23 decks354 decks
-1%synergy
Opposition
6.2%inclusion22 decks354 decks
6%synergy
Dismiss into Dream
5.6%inclusion20 decks354 decks
5%synergy
Verity Circle
5.4%inclusion19 decks354 decks
5%synergy
Planeswalkers
Oko, Thief of Crowns
21%inclusion76 decks354 decks
14%synergy
Kiora, the Crashing Wave
7.9%inclusion28 decks354 decks
5%synergy
Utility Lands
Reliquary Tower
61%inclusion217 decks354 decks
11%synergy
Temple of the False God
22%inclusion78 decks354 decks
6%synergy
Yavimaya, Cradle of Growth
21%inclusion75 decks354 decks
-1%synergy
Boseiju, Who Endures
20%inclusion70 decks354 decks
-2%synergy
Mosswort Bridge
19%inclusion69 decks354 decks
2%synergy
Otawara, Soaring City
18%inclusion63 decks354 decks
-1%synergy
Command Beacon
17%inclusion60 decks354 decks
13%synergy
Mistrise Village
17%inclusion50 decks303 decks
6%synergy
Mystic Sanctuary
16%inclusion57 decks354 decks
4%synergy
Alchemist's Refuge
16%inclusion56 decks354 decks
-2%synergy
Rogue's Passage
16%inclusion55 decks354 decks
-6%synergy
Castle Garenbrig
14%inclusion50 decks354 decks
10%synergy
Three Tree City
11%inclusion40 decks353 decks
6%synergy
Evendo, Waking Haven
10%inclusion21 decks206 decks
5%synergy
Castle Vantress
7.6%inclusion27 decks354 decks
1%synergy
Lumbering Falls
6.8%inclusion24 decks354 decks
0%synergy
Restless Vinestalk
6.5%inclusion23 decks354 decks
1%synergy
Scavenger Grounds
5.1%inclusion18 decks354 decks
1%synergy
Mana Artifacts
Sol Ring
92%inclusion326 decks354 decks
12%synergy
Arcane Signet
74%inclusion262 decks354 decks
11%synergy
Thought Vessel
36%inclusion129 decks354 decks
16%synergy
Simic Signet
36%inclusion126 decks354 decks
4%synergy
Talisman of Curiosity
28%inclusion99 decks354 decks
6%synergy
Fellwar Stone
12%inclusion43 decks354 decks
3%synergy
Commander's Sphere
9.3%inclusion33 decks354 decks
1%synergy
Thran Dynamo
6.8%inclusion24 decks354 decks
4%synergy
Decanter of Endless Water
6.5%inclusion23 decks354 decks
1%synergy
Mind Stone
5.6%inclusion20 decks354 decks
1%synergy
Lands
Island
94%inclusion333 decks354 decks
-1%synergy
Forest
94%inclusion331 decks354 decks
-2%synergy
Command Tower
91%inclusion321 decks354 decks
5%synergy
Hinterland Harbor
65%inclusion229 decks354 decks
5%synergy
Breeding Pool
58%inclusion205 decks354 decks
12%synergy
Yavimaya Coast
57%inclusion201 decks354 decks
4%synergy
Rejuvenating Springs
55%inclusion195 decks354 decks
11%synergy
Simic Growth Chamber
50%inclusion176 decks354 decks
1%synergy
Flooded Grove
49%inclusion174 decks354 decks
8%synergy
Dreamroot Cascade
47%inclusion168 decks354 decks
6%synergy
Misty Rainforest
40%inclusion141 decks354 decks
9%synergy
Temple of Mystery
38%inclusion135 decks354 decks
0%synergy
Vineglimmer Snarl
36%inclusion126 decks354 decks
-3%synergy
Barkchannel Pathway
34%inclusion120 decks354 decks
14%synergy
Waterlogged Grove
27%inclusion97 decks354 decks
7%synergy
Exotic Orchard
27%inclusion94 decks354 decks
3%synergy
Evolving Wilds
26%inclusion93 decks354 decks
1%synergy
Hedge Maze
25%inclusion87 decks354 decks
5%synergy
Myriad Landscape
23%inclusion81 decks354 decks
1%synergy
Thornwood Falls
22%inclusion79 decks354 decks
5%synergy
Willowrush Verge
21%inclusion72 decks345 decks
5%synergy
Tangled Islet
20%inclusion72 decks354 decks
4%synergy
Rimewood Falls
19%inclusion69 decks354 decks
10%synergy
Terramorphic Expanse
18%inclusion63 decks354 decks
-2%synergy
Botanical Sanctum
17%inclusion60 decks354 decks
4%synergy
Fabled Passage
16%inclusion55 decks354 decks
1%synergy
Sink into Stupor
15%inclusion54 decks354 decks
4%synergy
Overflowing Basin
15%inclusion53 decks354 decks
-4%synergy
Bala Ged Recovery
14%inclusion49 decks354 decks
4%synergy
Tropical Island
14%inclusion48 decks354 decks
-1%synergy
Snow-Covered Island
13%inclusion47 decks354 decks
6%synergy
Path of Ancestry
13%inclusion47 decks354 decks
-4%synergy
Snow-Covered Forest
13%inclusion47 decks354 decks
6%synergy
Glasspool Mimic
12%inclusion41 decks354 decks
7%synergy
Simic Guildgate
11%inclusion39 decks354 decks
1%synergy
Sea Gate Restoration
10%inclusion36 decks354 decks
5%synergy
Blighted Woodland
8.8%inclusion31 decks354 decks
1%synergy
Flooded Strand
7.9%inclusion28 decks354 decks
-3%synergy
Littjara Mirrorlake
7.9%inclusion28 decks354 decks
4%synergy
Windswept Heath
7.6%inclusion27 decks354 decks
-3%synergy
Scalding Tarn
7.6%inclusion27 decks354 decks
-2%synergy
Prismatic Vista
7.3%inclusion26 decks354 decks
0%synergy
Polluted Delta
7.3%inclusion26 decks354 decks
-3%synergy
Verdant Catacombs
7.3%inclusion26 decks354 decks
-2%synergy
Quandrix Campus
6.8%inclusion24 decks354 decks
0%synergy
Wooded Foothills
6.5%inclusion23 decks354 decks
-3%synergy
Bridgeworks Battle
6.5%inclusion23 decks354 decks
2%synergy
Woodland Stream
6.2%inclusion22 decks354 decks
1%synergy
Disciple of Freyalise
5.4%inclusion19 decks354 decks
1%synergy
About UsContactPrivacy PolicyTerms of Service
Space Cow MediaArchidektCardsphereCommander SpellbookFABRECSpellvoid
Space Cow MediaArchidektCommander's Herald
Commander SpellbookFABRECSpellvoid
EDHREC is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.
next@15 test