Koma, Cosmos Serpent (Commander) - Expensive Core

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #298
59decks
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.
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The Unagi of Kyoshi Island
25%inclusion2 decks8 decks
20%synergy
Agna Qel'a
14%inclusion1 decks7 decks
13%synergy
The Terror of Serpent's Pass
6.3%inclusion1 decks16 decks
6%synergy
High Synergy Cards
Adrix and Nev, Twincasters
86%inclusion51 decks59 decks
78%synergy
Aesi, Tyrant of Gyre Strait
85%inclusion50 decks59 decks
68%synergy
Whelming Wave
78%inclusion46 decks59 decks
67%synergy
Junk Winder
73%inclusion43 decks59 decks
66%synergy
Serpent of Yawning Depths
71%inclusion42 decks59 decks
65%synergy
Spawning Kraken
71%inclusion42 decks59 decks
64%synergy
Parallel Lives
69%inclusion41 decks59 decks
64%synergy
Elemental Bond
68%inclusion40 decks59 decks
62%synergy
Spark Double
71%inclusion42 decks59 decks
62%synergy
Koma, World-Eater
74%inclusion34 decks46 decks
61%synergy
Top Cards
Cultivate
83%inclusion49 decks59 decks
36%synergy
Kodama's Reach
81%inclusion48 decks59 decks
45%synergy
Counterspell
76%inclusion45 decks59 decks
26%synergy
Nature's Lore
69%inclusion41 decks59 decks
39%synergy
Three Visits
68%inclusion40 decks59 decks
45%synergy
Doubling Season
66%inclusion39 decks59 decks
57%synergy
Heroic Intervention
66%inclusion39 decks59 decks
36%synergy
Beast Within
66%inclusion39 decks59 decks
16%synergy
Rampant Growth
64%inclusion38 decks59 decks
24%synergy
Irenicus's Vile Duplication
64%inclusion38 decks59 decks
58%synergy
Game Changers
Seedborn Muse
20%inclusion12 decks59 decks
5%synergy
Consecrated Sphinx
14%inclusion8 decks59 decks
5%synergy
Worldly Tutor
8.5%inclusion5 decks59 decks
-7%synergy
Fierce Guardianship
6.8%inclusion4 decks59 decks
-10%synergy
Rhystic Study
5.1%inclusion3 decks59 decks
-17%synergy
Cyclonic Rift
5.1%inclusion3 decks59 decks
-21%synergy
Creatures
Birds of Paradise
64%inclusion38 decks59 decks
37%synergy
Sakashima of a Thousand Faces
63%inclusion37 decks59 decks
58%synergy
Arixmethes, Slumbering Isle
53%inclusion31 decks59 decks
39%synergy
Sakashima the Impostor
51%inclusion30 decks59 decks
48%synergy
Murkfiend Liege
51%inclusion30 decks59 decks
36%synergy
Elvish Mystic
46%inclusion27 decks59 decks
22%synergy
Llanowar Elves
44%inclusion26 decks59 decks
16%synergy
Summon: Leviathan
43%inclusion10 decks23 decks
36%synergy
Tatyova, Benthic Druid
42%inclusion25 decks59 decks
11%synergy
Roaming Throne
42%inclusion25 decks59 decks
34%synergy
Sakura-Tribe Elder
41%inclusion24 decks59 decks
21%synergy
Garruk's Packleader
37%inclusion22 decks59 decks
35%synergy
Hullbreaker Horror
36%inclusion21 decks59 decks
18%synergy
Eternal Witness
32%inclusion19 decks59 decks
11%synergy
Slinn Voda, the Rising Deep
32%inclusion19 decks59 decks
26%synergy
Enduring Vitality
30%inclusion15 decks50 decks
23%synergy
Esix, Fractal Bloom
29%inclusion17 decks59 decks
25%synergy
Ohran Frostfang
29%inclusion17 decks59 decks
25%synergy
Craterhoof Behemoth
29%inclusion17 decks59 decks
19%synergy
Fyndhorn Elves
27%inclusion16 decks59 decks
11%synergy
Curiosity Crafter
25%inclusion15 decks59 decks
22%synergy
Fanatic of Rhonas
24%inclusion13 decks54 decks
18%synergy
Octomancer
24%inclusion12 decks51 decks
19%synergy
Nadir Kraken
19%inclusion11 decks59 decks
15%synergy
Xolatoyac, the Smiling Flood
19%inclusion11 decks59 decks
11%synergy
Archetype of Imagination
19%inclusion11 decks59 decks
14%synergy
Kiora, Sovereign of the Deep
17%inclusion10 decks59 decks
15%synergy
Delighted Halfling
17%inclusion10 decks59 decks
6%synergy
Coiling Oracle
17%inclusion10 decks59 decks
4%synergy
Nezahal, Primal Tide
17%inclusion10 decks59 decks
6%synergy
Enduring Curiosity
16%inclusion8 decks50 decks
13%synergy
Scourge of Fleets
15%inclusion9 decks59 decks
7%synergy
Scute Swarm
15%inclusion9 decks59 decks
-6%synergy
Phyrexian Metamorph
15%inclusion9 decks59 decks
6%synergy
Auton Soldier
15%inclusion9 decks59 decks
13%synergy
Clever Impersonator
15%inclusion9 decks59 decks
11%synergy
Glasspool Mimic
15%inclusion9 decks59 decks
11%synergy
Uro, Titan of Nature's Wrath
15%inclusion9 decks59 decks
5%synergy
Avenger of Zendikar
14%inclusion8 decks59 decks
-4%synergy
Progenitor Mimic
14%inclusion8 decks59 decks
9%synergy
Tireless Provisioner
14%inclusion8 decks59 decks
-2%synergy
Reclamation Sage
12%inclusion7 decks59 decks
-2%synergy
Troyan, Gutsy Explorer
12%inclusion7 decks59 decks
9%synergy
Azusa, Lost but Seeking
12%inclusion7 decks59 decks
-2%synergy
Toski, Bearer of Secrets
12%inclusion7 decks59 decks
8%synergy
Gyre Engineer
10%inclusion6 decks59 decks
7%synergy
Rampaging Baloths
10%inclusion6 decks59 decks
-7%synergy
Inga and Esika
10%inclusion6 decks59 decks
7%synergy
Lotus Cobra
10%inclusion6 decks59 decks
-4%synergy
Circle of Dreams Druid
10%inclusion6 decks59 decks
8%synergy
Instants
Growth Spiral
59%inclusion35 decks59 decks
15%synergy
Double Major
47%inclusion28 decks59 decks
39%synergy
Second Harvest
46%inclusion27 decks59 decks
39%synergy
An Offer You Can't Refuse
41%inclusion24 decks59 decks
18%synergy
Pongify
39%inclusion23 decks59 decks
14%synergy
Negate
37%inclusion22 decks59 decks
11%synergy
Arcane Denial
37%inclusion22 decks59 decks
15%synergy
Return of the Wildspeaker
34%inclusion20 decks59 decks
24%synergy
Rapid Hybridization
34%inclusion20 decks59 decks
8%synergy
Mana Drain
34%inclusion20 decks59 decks
18%synergy
Swan Song
27%inclusion16 decks59 decks
8%synergy
Simic Charm
19%inclusion11 decks59 decks
11%synergy
Nature's Claim
17%inclusion10 decks59 decks
7%synergy
Brainstorm
17%inclusion10 decks59 decks
3%synergy
Reality Shift
17%inclusion10 decks59 decks
2%synergy
Planar Genesis
13%inclusion7 decks54 decks
2%synergy
Krosan Grip
12%inclusion7 decks59 decks
4%synergy
Tamiyo's Safekeeping
12%inclusion7 decks59 decks
6%synergy
Sublime Epiphany
10%inclusion6 decks59 decks
8%synergy
Entish Restoration
10%inclusion6 decks59 decks
1%synergy
Voidslime
10%inclusion6 decks59 decks
5%synergy
Harrow
8.5%inclusion5 decks59 decks
-3%synergy
Return to Nature
8.5%inclusion5 decks59 decks
3%synergy
Chord of Calling
8.5%inclusion5 decks59 decks
1%synergy
Collective Resistance
7.4%inclusion4 decks54 decks
4%synergy
Sink into Stupor
7.4%inclusion4 decks54 decks
-4%synergy
Mystic Reflection
6.8%inclusion4 decks59 decks
4%synergy
Noxious Revival
6.8%inclusion4 decks59 decks
1%synergy
Tyvar's Stand
6.8%inclusion4 decks59 decks
4%synergy
Disallow
6.8%inclusion4 decks59 decks
5%synergy
Snakeskin Veil
6.8%inclusion4 decks59 decks
1%synergy
Stubborn Denial
6.8%inclusion4 decks59 decks
4%synergy
Biosynthic Burst
5.9%inclusion1 decks17 decks
5%synergy
Scour for Scrap
5.9%inclusion1 decks17 decks
4%synergy
See Double
5.1%inclusion3 decks59 decks
3%synergy
Frantic Search
5.1%inclusion3 decks59 decks
0%synergy
Force of Vigor
5.1%inclusion3 decks59 decks
0%synergy
Jwari Disruption
5.1%inclusion3 decks59 decks
4%synergy
Eureka Moment
5.1%inclusion3 decks59 decks
-6%synergy
Cackling Counterpart
5.1%inclusion3 decks59 decks
2%synergy
Sorceries
Farseek
49%inclusion29 decks59 decks
25%synergy
Skyshroud Claim
46%inclusion27 decks59 decks
37%synergy
Quantum Misalignment
34%inclusion20 decks59 decks
31%synergy
Rite of Replication
29%inclusion17 decks59 decks
22%synergy
Explore
22%inclusion13 decks59 decks
2%synergy
Overwhelming Stampede
19%inclusion11 decks59 decks
6%synergy
Finale of Devastation
17%inclusion10 decks59 decks
5%synergy
Rishkar's Expertise
17%inclusion10 decks59 decks
9%synergy
Bala Ged Recovery
17%inclusion10 decks59 decks
7%synergy
Triumph of the Hordes
14%inclusion8 decks59 decks
11%synergy
Urban Evolution
12%inclusion7 decks59 decks
2%synergy
Shamanic Revelation
10%inclusion6 decks59 decks
5%synergy
Bridgeworks Battle
9.3%inclusion5 decks54 decks
5%synergy
Doppelgang
8.6%inclusion5 decks58 decks
2%synergy
Last March of the Ents
8.5%inclusion5 decks59 decks
5%synergy
Curse of the Swine
8.5%inclusion5 decks59 decks
-2%synergy
Quasiduplicate
8.5%inclusion5 decks59 decks
6%synergy
Migration Path
6.8%inclusion4 decks59 decks
3%synergy
Ponder
6.8%inclusion4 decks59 decks
0%synergy
Into the North
6.8%inclusion4 decks59 decks
6%synergy
Open the Way
6.8%inclusion4 decks59 decks
4%synergy
Raise the Palisade
6.8%inclusion4 decks59 decks
0%synergy
Ezuri's Predation
6.8%inclusion4 decks59 decks
-1%synergy
Aggressive Biomancy
5.6%inclusion3 decks54 decks
0%synergy
Sea Gate Restoration
5.1%inclusion3 decks59 decks
0%synergy
Preordain
5.1%inclusion3 decks59 decks
-3%synergy
Green Sun's Zenith
5.1%inclusion3 decks59 decks
-4%synergy
Awaken the Woods
5.1%inclusion3 decks59 decks
0%synergy
Tempt with Discovery
5.1%inclusion3 decks59 decks
1%synergy
Broken Bond
5.1%inclusion3 decks59 decks
0%synergy
Distant Melody
5.1%inclusion3 decks59 decks
2%synergy
Regrowth
5.1%inclusion3 decks59 decks
1%synergy
Croaking Counterpart
5.1%inclusion3 decks59 decks
0%synergy
Replication Technique
5.1%inclusion3 decks59 decks
2%synergy
Utility Artifacts
Helm of the Host
61%inclusion36 decks59 decks
56%synergy
Lightning Greaves
51%inclusion30 decks59 decks
29%synergy
Swiftfoot Boots
46%inclusion27 decks59 decks
20%synergy
Combine Chrysalis
31%inclusion18 decks59 decks
26%synergy
Eldrazi Monument
19%inclusion11 decks59 decks
18%synergy
Mirror Box
19%inclusion11 decks59 decks
15%synergy
The Great Henge
17%inclusion10 decks59 decks
8%synergy
Idol of Oblivion
15%inclusion9 decks59 decks
12%synergy
Emerald Medallion
14%inclusion8 decks59 decks
11%synergy
Sapphire Medallion
14%inclusion8 decks59 decks
10%synergy
Bident of Thassa
12%inclusion7 decks59 decks
5%synergy
Mirror Gallery
10%inclusion6 decks59 decks
10%synergy
Lithoform Engine
6.8%inclusion4 decks59 decks
6%synergy
Crucible of Worlds
5.1%inclusion3 decks59 decks
0%synergy
Coat of Arms
5.1%inclusion3 decks59 decks
4%synergy
Shadowspear
5.1%inclusion3 decks59 decks
4%synergy
Enchantments
Tribute to the World Tree
53%inclusion31 decks59 decks
46%synergy
Kindred Discovery
37%inclusion22 decks59 decks
27%synergy
Mystic Remora
27%inclusion16 decks59 decks
12%synergy
Growing Rites of Itlimoc
25%inclusion15 decks59 decks
19%synergy
Primal Vigor
25%inclusion15 decks59 decks
22%synergy
Garruk's Uprising
22%inclusion13 decks59 decks
6%synergy
Exploration
20%inclusion12 decks59 decks
7%synergy
Sylvan Library
19%inclusion11 decks59 decks
9%synergy
Defense of the Heart
17%inclusion10 decks59 decks
15%synergy
Impostor Syndrome
14%inclusion2 decks14 decks
12%synergy
Beastmaster Ascension
14%inclusion8 decks59 decks
10%synergy
Utopia Sprawl
12%inclusion7 decks59 decks
5%synergy
Asceticism
12%inclusion7 decks59 decks
8%synergy
Wild Growth
12%inclusion7 decks59 decks
3%synergy
Wilderness Reclamation
10%inclusion6 decks59 decks
1%synergy
Cryptolith Rite
10%inclusion6 decks59 decks
7%synergy
Unnatural Growth
10%inclusion6 decks59 decks
7%synergy
Zendikar Resurgent
8.5%inclusion5 decks59 decks
6%synergy
Kenrith's Transformation
8.5%inclusion5 decks59 decks
4%synergy
Extravagant Replication
8.5%inclusion5 decks59 decks
6%synergy
Propaganda
8.5%inclusion5 decks59 decks
2%synergy
Imprisoned in the Moon
6.8%inclusion4 decks59 decks
3%synergy
Paradox Haze
6.8%inclusion4 decks59 decks
6%synergy
Walk-In Closet // Forgotten Cellar
6.1%inclusion3 decks49 decks
3%synergy
Mirror Room // Fractured Realm
6.0%inclusion3 decks50 decks
5%synergy
Moonlit Meditation
5.9%inclusion1 decks17 decks
4%synergy
Burgeoning
5.1%inclusion3 decks59 decks
-2%synergy
Opposition
5.1%inclusion3 decks59 decks
5%synergy
Up the Beanstalk
5.1%inclusion3 decks59 decks
1%synergy
Verity Circle
5.1%inclusion3 decks59 decks
5%synergy
Kiora Bests the Sea God
5.1%inclusion3 decks59 decks
3%synergy
Mana Reflection
5.1%inclusion3 decks59 decks
0%synergy
Battles
Invasion of Segovia
5.1%inclusion3 decks59 decks
4%synergy
Planeswalkers
Oko, Thief of Crowns
22%inclusion13 decks59 decks
15%synergy
Kiora, the Crashing Wave
12%inclusion7 decks59 decks
9%synergy
Utility Lands
Reliquary Tower
61%inclusion36 decks59 decks
11%synergy
Boseiju, Who Endures
37%inclusion22 decks59 decks
15%synergy
Yavimaya, Cradle of Growth
31%inclusion18 decks59 decks
8%synergy
Otawara, Soaring City
31%inclusion18 decks59 decks
12%synergy
Three Tree City
24%inclusion12 decks51 decks
18%synergy
Evendo, Waking Haven
22%inclusion4 decks18 decks
17%synergy
Mosswort Bridge
20%inclusion12 decks59 decks
3%synergy
Alchemist's Refuge
17%inclusion10 decks59 decks
-1%synergy
Mystic Sanctuary
17%inclusion10 decks59 decks
4%synergy
Command Beacon
17%inclusion10 decks59 decks
13%synergy
Temple of the False God
15%inclusion9 decks59 decks
0%synergy
Castle Garenbrig
14%inclusion8 decks59 decks
9%synergy
Rogue's Passage
14%inclusion8 decks59 decks
-8%synergy
Restless Vinestalk
10%inclusion6 decks59 decks
5%synergy
Castle Vantress
8.5%inclusion5 decks59 decks
2%synergy
Mistrise Village
7.4%inclusion2 decks27 decks
-3%synergy
Nykthos, Shrine to Nyx
6.8%inclusion4 decks59 decks
4%synergy
Thespian's Stage
6.8%inclusion4 decks59 decks
0%synergy
Rivendell
5.1%inclusion3 decks59 decks
-1%synergy
Lumbering Falls
5.1%inclusion3 decks59 decks
-2%synergy
Mana Artifacts
Sol Ring
93%inclusion55 decks59 decks
13%synergy
Arcane Signet
68%inclusion40 decks59 decks
5%synergy
Simic Signet
39%inclusion23 decks59 decks
7%synergy
Thought Vessel
37%inclusion22 decks59 decks
17%synergy
Talisman of Curiosity
24%inclusion14 decks59 decks
2%synergy
Decanter of Endless Water
8.5%inclusion5 decks59 decks
3%synergy
Fellwar Stone
6.8%inclusion4 decks59 decks
-3%synergy
Commander's Sphere
5.1%inclusion3 decks59 decks
-3%synergy
Midnight Clock
5.1%inclusion3 decks59 decks
3%synergy
Lands
Island
90%inclusion53 decks59 decks
-6%synergy
Forest
90%inclusion53 decks59 decks
-5%synergy
Command Tower
88%inclusion52 decks59 decks
3%synergy
Breeding Pool
78%inclusion46 decks59 decks
32%synergy
Rejuvenating Springs
71%inclusion42 decks59 decks
27%synergy
Hinterland Harbor
69%inclusion41 decks59 decks
10%synergy
Dreamroot Cascade
63%inclusion37 decks59 decks
21%synergy
Misty Rainforest
56%inclusion33 decks59 decks
25%synergy
Yavimaya Coast
53%inclusion31 decks59 decks
0%synergy
Simic Growth Chamber
51%inclusion30 decks59 decks
2%synergy
Vineglimmer Snarl
46%inclusion27 decks59 decks
7%synergy
Flooded Grove
42%inclusion25 decks59 decks
2%synergy
Barkchannel Pathway
39%inclusion23 decks59 decks
19%synergy
Hedge Maze
36%inclusion21 decks58 decks
17%synergy
Tropical Island
32%inclusion19 decks59 decks
18%synergy
Temple of Mystery
32%inclusion19 decks59 decks
-6%synergy
Willowrush Verge
29%inclusion10 decks35 decks
12%synergy
Rimewood Falls
25%inclusion15 decks59 decks
16%synergy
Fabled Passage
24%inclusion14 decks59 decks
9%synergy
Myriad Landscape
20%inclusion12 decks59 decks
-2%synergy
Waterlogged Grove
20%inclusion12 decks59 decks
0%synergy
Tangled Islet
20%inclusion12 decks59 decks
4%synergy
Overflowing Basin
17%inclusion10 decks58 decks
-2%synergy
Bala Ged Recovery
17%inclusion10 decks59 decks
7%synergy
Path of Ancestry
15%inclusion9 decks59 decks
-2%synergy
Terramorphic Expanse
15%inclusion9 decks59 decks
-5%synergy
Glasspool Mimic
15%inclusion9 decks59 decks
11%synergy
Exotic Orchard
14%inclusion8 decks59 decks
-10%synergy
Thornwood Falls
14%inclusion8 decks59 decks
-4%synergy
Botanical Sanctum
14%inclusion8 decks59 decks
1%synergy
Evolving Wilds
14%inclusion8 decks59 decks
-12%synergy
Snow-Covered Island
12%inclusion7 decks59 decks
5%synergy
Littjara Mirrorlake
12%inclusion7 decks59 decks
8%synergy
Snow-Covered Forest
12%inclusion7 decks59 decks
5%synergy
Wooded Foothills
12%inclusion7 decks59 decks
2%synergy
Blighted Woodland
10%inclusion6 decks59 decks
3%synergy
Bridgeworks Battle
9.3%inclusion5 decks54 decks
5%synergy
Cavern of Souls
8.5%inclusion5 decks59 decks
3%synergy
Prismatic Vista
8.5%inclusion5 decks59 decks
1%synergy
Windswept Heath
8.5%inclusion5 decks59 decks
-2%synergy
Polluted Delta
8.5%inclusion5 decks59 decks
-2%synergy
Sink into Stupor
7.4%inclusion4 decks54 decks
-4%synergy
Lush Oasis
7.1%inclusion4 decks56 decks
1%synergy
Verdant Catacombs
6.8%inclusion4 decks59 decks
-3%synergy
Scalding Tarn
6.8%inclusion4 decks59 decks
-3%synergy
Flooded Strand
6.8%inclusion4 decks59 decks
-4%synergy
Tanglepool Bridge
6.8%inclusion4 decks59 decks
2%synergy
Sea Gate Restoration
5.1%inclusion3 decks59 decks
0%synergy
Jwari Disruption
5.1%inclusion3 decks59 decks
4%synergy
Simic Guildgate
5.1%inclusion3 decks59 decks
-5%synergy
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