Koma, Cosmos Serpent (Commander) - Expensive Core

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #307
59decks
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
20%inclusion2 decks10 decks
15%synergy
Agna Qel'a
11%inclusion1 decks9 decks
10%synergy
The Terror of Serpent's Pass
5.6%inclusion1 decks18 decks
5%synergy
High Synergy Cards
Adrix and Nev, Twincasters
86%inclusion51 decks59 decks
78%synergy
Junk Winder
76%inclusion45 decks59 decks
70%synergy
Aesi, Tyrant of Gyre Strait
85%inclusion50 decks59 decks
67%synergy
Whelming Wave
78%inclusion46 decks59 decks
67%synergy
Serpent of Yawning Depths
73%inclusion43 decks59 decks
67%synergy
Elemental Bond
71%inclusion42 decks59 decks
66%synergy
Parallel Lives
71%inclusion42 decks59 decks
65%synergy
Spark Double
73%inclusion43 decks59 decks
63%synergy
Spawning Kraken
69%inclusion41 decks59 decks
62%synergy
Sakashima of a Thousand Faces
66%inclusion39 decks59 decks
61%synergy
Top Cards
Kodama's Reach
80%inclusion47 decks59 decks
44%synergy
Cultivate
80%inclusion47 decks59 decks
33%synergy
Koma, World-Eater
73%inclusion36 decks49 decks
60%synergy
Three Visits
73%inclusion43 decks59 decks
50%synergy
Nature's Lore
73%inclusion43 decks59 decks
42%synergy
Counterspell
73%inclusion43 decks59 decks
23%synergy
Beast Within
68%inclusion40 decks59 decks
18%synergy
Rampant Growth
66%inclusion39 decks59 decks
26%synergy
Heroic Intervention
66%inclusion39 decks59 decks
36%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
10%inclusion6 decks59 decks
-5%synergy
Fierce Guardianship
6.8%inclusion4 decks59 decks
-11%synergy
Rhystic Study
5.1%inclusion3 decks59 decks
-17%synergy
Creatures
Birds of Paradise
59%inclusion35 decks59 decks
31%synergy
Sakashima the Impostor
56%inclusion33 decks59 decks
53%synergy
Arixmethes, Slumbering Isle
53%inclusion31 decks59 decks
39%synergy
Murkfiend Liege
49%inclusion29 decks59 decks
35%synergy
Tatyova, Benthic Druid
47%inclusion28 decks59 decks
16%synergy
Elvish Mystic
46%inclusion27 decks59 decks
22%synergy
Llanowar Elves
44%inclusion26 decks59 decks
16%synergy
Roaming Throne
42%inclusion25 decks59 decks
34%synergy
Sakura-Tribe Elder
42%inclusion25 decks59 decks
23%synergy
Garruk's Packleader
37%inclusion22 decks59 decks
35%synergy
Summon: Leviathan
36%inclusion9 decks25 decks
29%synergy
Hullbreaker Horror
36%inclusion21 decks59 decks
18%synergy
Slinn Voda, the Rising Deep
34%inclusion20 decks59 decks
27%synergy
Enduring Vitality
32%inclusion17 decks53 decks
25%synergy
Eternal Witness
31%inclusion18 decks59 decks
10%synergy
Fyndhorn Elves
29%inclusion17 decks59 decks
13%synergy
Craterhoof Behemoth
29%inclusion17 decks59 decks
19%synergy
Esix, Fractal Bloom
27%inclusion16 decks59 decks
23%synergy
Ohran Frostfang
27%inclusion16 decks59 decks
23%synergy
Curiosity Crafter
25%inclusion15 decks59 decks
22%synergy
Archetype of Imagination
22%inclusion13 decks59 decks
18%synergy
Fanatic of Rhonas
22%inclusion12 decks55 decks
16%synergy
Octomancer
21%inclusion11 decks53 decks
16%synergy
Nezahal, Primal Tide
20%inclusion12 decks59 decks
9%synergy
Xolatoyac, the Smiling Flood
19%inclusion11 decks59 decks
11%synergy
Nadir Kraken
19%inclusion11 decks59 decks
15%synergy
Delighted Halfling
17%inclusion10 decks59 decks
5%synergy
Kiora, Sovereign of the Deep
17%inclusion10 decks59 decks
15%synergy
Glasspool Mimic
17%inclusion10 decks59 decks
13%synergy
Progenitor Mimic
17%inclusion10 decks59 decks
12%synergy
Scute Swarm
17%inclusion10 decks59 decks
-4%synergy
Scourge of Fleets
15%inclusion9 decks59 decks
7%synergy
Coiling Oracle
15%inclusion9 decks59 decks
2%synergy
Auton Soldier
15%inclusion9 decks59 decks
13%synergy
Tireless Provisioner
15%inclusion9 decks59 decks
0%synergy
Uro, Titan of Nature's Wrath
15%inclusion9 decks59 decks
5%synergy
Phyrexian Metamorph
15%inclusion9 decks59 decks
6%synergy
Avenger of Zendikar
15%inclusion9 decks59 decks
-2%synergy
Clever Impersonator
15%inclusion9 decks59 decks
10%synergy
Enduring Curiosity
15%inclusion8 decks53 decks
12%synergy
Lotus Cobra
14%inclusion8 decks59 decks
0%synergy
Chameleon, Master of Disguise
13%inclusion2 decks16 decks
10%synergy
Reclamation Sage
12%inclusion7 decks59 decks
-2%synergy
Toski, Bearer of Secrets
12%inclusion7 decks59 decks
8%synergy
Troyan, Gutsy Explorer
12%inclusion7 decks59 decks
9%synergy
Azusa, Lost but Seeking
12%inclusion7 decks59 decks
-2%synergy
Starwinder
11%inclusion2 decks19 decks
4%synergy
Inga and Esika
10%inclusion6 decks59 decks
7%synergy
Circle of Dreams Druid
10%inclusion6 decks59 decks
8%synergy
Rampaging Baloths
10%inclusion6 decks59 decks
-7%synergy
Instants
Growth Spiral
54%inclusion32 decks59 decks
10%synergy
Double Major
46%inclusion27 decks59 decks
37%synergy
Second Harvest
46%inclusion27 decks59 decks
39%synergy
An Offer You Can't Refuse
41%inclusion24 decks59 decks
17%synergy
Pongify
39%inclusion23 decks59 decks
14%synergy
Arcane Denial
36%inclusion21 decks59 decks
13%synergy
Negate
36%inclusion21 decks59 decks
10%synergy
Return of the Wildspeaker
34%inclusion20 decks59 decks
24%synergy
Rapid Hybridization
31%inclusion18 decks59 decks
4%synergy
Mana Drain
31%inclusion18 decks59 decks
15%synergy
Swan Song
27%inclusion16 decks59 decks
8%synergy
Brainstorm
17%inclusion10 decks59 decks
3%synergy
Nature's Claim
17%inclusion10 decks59 decks
7%synergy
Simic Charm
17%inclusion10 decks59 decks
9%synergy
Tamiyo's Safekeeping
15%inclusion9 decks59 decks
10%synergy
Reality Shift
14%inclusion8 decks59 decks
-1%synergy
Planar Genesis
13%inclusion7 decks55 decks
2%synergy
Harrow
12%inclusion7 decks59 decks
0%synergy
Voidslime
12%inclusion7 decks59 decks
7%synergy
Sink into Stupor
11%inclusion6 decks55 decks
-1%synergy
Krosan Grip
10%inclusion6 decks59 decks
2%synergy
Sublime Epiphany
10%inclusion6 decks59 decks
8%synergy
Mystic Reflection
10%inclusion6 decks59 decks
8%synergy
Collective Resistance
9.1%inclusion5 decks55 decks
6%synergy
Snakeskin Veil
8.5%inclusion5 decks59 decks
3%synergy
Chord of Calling
8.5%inclusion5 decks59 decks
1%synergy
Entish Restoration
8.5%inclusion5 decks59 decks
-1%synergy
Return to Nature
8.5%inclusion5 decks59 decks
3%synergy
Stubborn Denial
6.8%inclusion4 decks59 decks
4%synergy
Tyvar's Stand
6.8%inclusion4 decks59 decks
4%synergy
Noxious Revival
6.8%inclusion4 decks59 decks
1%synergy
Biosynthic Burst
5.3%inclusion1 decks19 decks
4%synergy
Scour for Scrap
5.3%inclusion1 decks19 decks
3%synergy
Jwari Disruption
5.1%inclusion3 decks59 decks
4%synergy
Cackling Counterpart
5.1%inclusion3 decks59 decks
2%synergy
Eureka Moment
5.1%inclusion3 decks59 decks
-6%synergy
See Double
5.1%inclusion3 decks59 decks
3%synergy
Frantic Search
5.1%inclusion3 decks59 decks
-1%synergy
Force of Vigor
5.1%inclusion3 decks59 decks
0%synergy
Sorceries
Farseek
54%inclusion32 decks59 decks
29%synergy
Skyshroud Claim
51%inclusion30 decks59 decks
42%synergy
Quantum Misalignment
36%inclusion21 decks59 decks
33%synergy
Rite of Replication
34%inclusion20 decks59 decks
27%synergy
Explore
22%inclusion13 decks59 decks
2%synergy
Finale of Devastation
20%inclusion12 decks59 decks
9%synergy
Rishkar's Expertise
20%inclusion12 decks59 decks
12%synergy
Overwhelming Stampede
20%inclusion12 decks59 decks
8%synergy
Bala Ged Recovery
19%inclusion11 decks59 decks
9%synergy
Triumph of the Hordes
14%inclusion8 decks59 decks
11%synergy
Urban Evolution
12%inclusion7 decks59 decks
2%synergy
Migration Path
12%inclusion7 decks59 decks
9%synergy
Doppelgang
10%inclusion6 decks59 decks
4%synergy
Explosive Vegetation
10%inclusion6 decks59 decks
4%synergy
Bridgeworks Battle
9.1%inclusion5 decks55 decks
4%synergy
Last March of the Ents
8.5%inclusion5 decks59 decks
5%synergy
Quasiduplicate
8.5%inclusion5 decks59 decks
6%synergy
Shamanic Revelation
8.5%inclusion5 decks59 decks
3%synergy
Aggressive Biomancy
7.3%inclusion4 decks55 decks
2%synergy
Nature's Rhythm
6.9%inclusion2 decks29 decks
1%synergy
Into the North
6.8%inclusion4 decks59 decks
6%synergy
Harmonize
6.8%inclusion4 decks59 decks
1%synergy
Distant Melody
6.8%inclusion4 decks59 decks
4%synergy
Open the Way
6.8%inclusion4 decks59 decks
4%synergy
Raise the Palisade
6.8%inclusion4 decks59 decks
0%synergy
Ponder
6.8%inclusion4 decks59 decks
0%synergy
Tempt with Discovery
6.8%inclusion4 decks59 decks
3%synergy
Curse of the Swine
6.8%inclusion4 decks59 decks
-4%synergy
Regrowth
6.8%inclusion4 decks59 decks
3%synergy
Awaken the Woods
5.1%inclusion3 decks59 decks
0%synergy
Turntimber Symbiosis
5.1%inclusion3 decks59 decks
3%synergy
Broken Bond
5.1%inclusion3 decks59 decks
0%synergy
Green Sun's Zenith
5.1%inclusion3 decks59 decks
-4%synergy
Replication Technique
5.1%inclusion3 decks59 decks
2%synergy
Ezuri's Predation
5.1%inclusion3 decks59 decks
-3%synergy
Croaking Counterpart
5.1%inclusion3 decks59 decks
1%synergy
Sea Gate Restoration
5.1%inclusion3 decks59 decks
0%synergy
Ravenform
5.1%inclusion3 decks59 decks
1%synergy
Utility Artifacts
Helm of the Host
59%inclusion35 decks59 decks
54%synergy
Swiftfoot Boots
46%inclusion27 decks59 decks
20%synergy
Lightning Greaves
46%inclusion27 decks59 decks
24%synergy
Combine Chrysalis
27%inclusion16 decks59 decks
23%synergy
Mirror Box
19%inclusion11 decks59 decks
15%synergy
Eldrazi Monument
19%inclusion11 decks59 decks
18%synergy
The Great Henge
17%inclusion10 decks59 decks
8%synergy
Sapphire Medallion
15%inclusion9 decks59 decks
12%synergy
Emerald Medallion
15%inclusion9 decks59 decks
12%synergy
Idol of Oblivion
14%inclusion8 decks59 decks
10%synergy
Bident of Thassa
12%inclusion7 decks59 decks
5%synergy
Mirror Gallery
8.5%inclusion5 decks59 decks
8%synergy
Lithoform Engine
6.8%inclusion4 decks59 decks
6%synergy
Shadowspear
5.1%inclusion3 decks59 decks
4%synergy
Coat of Arms
5.1%inclusion3 decks59 decks
4%synergy
Crucible of Worlds
5.1%inclusion3 decks59 decks
0%synergy
Enchantments
Doubling Season
63%inclusion37 decks59 decks
53%synergy
Tribute to the World Tree
56%inclusion33 decks59 decks
50%synergy
Kindred Discovery
37%inclusion22 decks59 decks
28%synergy
Mystic Remora
29%inclusion17 decks59 decks
13%synergy
Growing Rites of Itlimoc
27%inclusion16 decks59 decks
21%synergy
Primal Vigor
27%inclusion16 decks59 decks
24%synergy
Exploration
20%inclusion12 decks59 decks
7%synergy
Garruk's Uprising
20%inclusion12 decks59 decks
4%synergy
Defense of the Heart
19%inclusion11 decks59 decks
16%synergy
Beastmaster Ascension
15%inclusion9 decks59 decks
12%synergy
Sylvan Library
15%inclusion9 decks59 decks
6%synergy
Impostor Syndrome
13%inclusion2 decks16 decks
11%synergy
Wild Growth
12%inclusion7 decks59 decks
3%synergy
Utopia Sprawl
12%inclusion7 decks59 decks
5%synergy
Extravagant Replication
12%inclusion7 decks59 decks
9%synergy
Asceticism
12%inclusion7 decks59 decks
9%synergy
Cryptolith Rite
12%inclusion7 decks59 decks
9%synergy
Kenrith's Transformation
10%inclusion6 decks59 decks
6%synergy
Wilderness Reclamation
8.5%inclusion5 decks59 decks
0%synergy
Imprisoned in the Moon
8.5%inclusion5 decks59 decks
4%synergy
Unnatural Growth
8.5%inclusion5 decks59 decks
5%synergy
Propaganda
8.5%inclusion5 decks59 decks
2%synergy
Mirror Room // Fractured Realm
7.5%inclusion4 decks53 decks
6%synergy
Kiora Bests the Sea God
6.8%inclusion4 decks59 decks
5%synergy
Paradox Haze
6.8%inclusion4 decks59 decks
6%synergy
Walk-In Closet // Forgotten Cellar
5.8%inclusion3 decks52 decks
3%synergy
Moonlit Meditation
5.3%inclusion1 decks19 decks
4%synergy
Up the Beanstalk
5.1%inclusion3 decks59 decks
1%synergy
Burgeoning
5.1%inclusion3 decks59 decks
-2%synergy
Zendikar Resurgent
5.1%inclusion3 decks59 decks
2%synergy
Opposition
5.1%inclusion3 decks59 decks
5%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
25%inclusion15 decks59 decks
18%synergy
Kiora, the Crashing Wave
14%inclusion8 decks59 decks
11%synergy
Kiora, Behemoth Beckoner
5.1%inclusion3 decks59 decks
-1%synergy
Utility Lands
Reliquary Tower
61%inclusion36 decks59 decks
11%synergy
Boseiju, Who Endures
34%inclusion20 decks59 decks
11%synergy
Yavimaya, Cradle of Growth
32%inclusion19 decks59 decks
10%synergy
Otawara, Soaring City
29%inclusion17 decks59 decks
10%synergy
Evendo, Waking Haven
25%inclusion5 decks20 decks
20%synergy
Three Tree City
25%inclusion13 decks53 decks
19%synergy
Mosswort Bridge
19%inclusion11 decks59 decks
1%synergy
Temple of the False God
17%inclusion10 decks59 decks
1%synergy
Mystic Sanctuary
17%inclusion10 decks59 decks
4%synergy
Command Beacon
17%inclusion10 decks59 decks
13%synergy
Alchemist's Refuge
15%inclusion9 decks59 decks
-2%synergy
Castle Garenbrig
14%inclusion8 decks59 decks
9%synergy
Rogue's Passage
12%inclusion7 decks59 decks
-10%synergy
Restless Vinestalk
10%inclusion6 decks59 decks
5%synergy
Castle Vantress
8.5%inclusion5 decks59 decks
2%synergy
Mistrise Village
6.9%inclusion2 decks29 decks
-4%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
92%inclusion54 decks59 decks
11%synergy
Arcane Signet
69%inclusion41 decks59 decks
7%synergy
Simic Signet
39%inclusion23 decks59 decks
7%synergy
Thought Vessel
36%inclusion21 decks59 decks
15%synergy
Talisman of Curiosity
25%inclusion15 decks59 decks
4%synergy
Decanter of Endless Water
8.5%inclusion5 decks59 decks
3%synergy
Fellwar Stone
6.8%inclusion4 decks59 decks
-3%synergy
Midnight Clock
5.1%inclusion3 decks59 decks
3%synergy
Lands
Command Tower
90%inclusion53 decks59 decks
5%synergy
Island
88%inclusion52 decks59 decks
-7%synergy
Forest
88%inclusion52 decks59 decks
-7%synergy
Breeding Pool
78%inclusion46 decks59 decks
32%synergy
Rejuvenating Springs
71%inclusion42 decks59 decks
27%synergy
Hinterland Harbor
68%inclusion40 decks59 decks
8%synergy
Dreamroot Cascade
63%inclusion37 decks59 decks
20%synergy
Yavimaya Coast
54%inclusion32 decks59 decks
2%synergy
Misty Rainforest
51%inclusion30 decks59 decks
19%synergy
Simic Growth Chamber
46%inclusion27 decks59 decks
-2%synergy
Vineglimmer Snarl
46%inclusion27 decks59 decks
7%synergy
Flooded Grove
44%inclusion26 decks59 decks
3%synergy
Barkchannel Pathway
42%inclusion25 decks59 decks
22%synergy
Hedge Maze
39%inclusion23 decks59 decks
19%synergy
Tropical Island
36%inclusion21 decks59 decks
21%synergy
Temple of Mystery
34%inclusion20 decks59 decks
-4%synergy
Willowrush Verge
29%inclusion11 decks38 decks
12%synergy
Rimewood Falls
25%inclusion15 decks59 decks
16%synergy
Fabled Passage
24%inclusion14 decks59 decks
9%synergy
Waterlogged Grove
24%inclusion14 decks59 decks
3%synergy
Tangled Islet
22%inclusion13 decks59 decks
6%synergy
Myriad Landscape
20%inclusion12 decks59 decks
-1%synergy
Bala Ged Recovery
19%inclusion11 decks59 decks
9%synergy
Evolving Wilds
17%inclusion10 decks59 decks
-8%synergy
Glasspool Mimic
17%inclusion10 decks59 decks
13%synergy
Exotic Orchard
17%inclusion10 decks59 decks
-7%synergy
Terramorphic Expanse
15%inclusion9 decks59 decks
-5%synergy
Snow-Covered Island
15%inclusion9 decks59 decks
8%synergy
Snow-Covered Forest
15%inclusion9 decks59 decks
9%synergy
Path of Ancestry
15%inclusion9 decks59 decks
-2%synergy
Thornwood Falls
15%inclusion9 decks59 decks
-2%synergy
Overflowing Basin
15%inclusion9 decks59 decks
-4%synergy
Littjara Mirrorlake
14%inclusion8 decks59 decks
10%synergy
Botanical Sanctum
12%inclusion7 decks59 decks
-1%synergy
Sink into Stupor
11%inclusion6 decks55 decks
-1%synergy
Blighted Woodland
10%inclusion6 decks59 decks
3%synergy
Wooded Foothills
10%inclusion6 decks59 decks
0%synergy
Bridgeworks Battle
9.1%inclusion5 decks55 decks
4%synergy
Cavern of Souls
8.5%inclusion5 decks59 decks
3%synergy
Polluted Delta
8.5%inclusion5 decks59 decks
-2%synergy
Lush Oasis
7.0%inclusion4 decks57 decks
1%synergy
Windswept Heath
6.8%inclusion4 decks59 decks
-4%synergy
Tanglepool Bridge
6.8%inclusion4 decks59 decks
2%synergy
Scalding Tarn
6.8%inclusion4 decks59 decks
-3%synergy
Flooded Strand
6.8%inclusion4 decks59 decks
-5%synergy
Prismatic Vista
6.8%inclusion4 decks59 decks
-1%synergy
Verdant Catacombs
6.8%inclusion4 decks59 decks
-3%synergy
Turntimber Symbiosis
5.1%inclusion3 decks59 decks
3%synergy
Jwari Disruption
5.1%inclusion3 decks59 decks
4%synergy
Sea Gate Restoration
5.1%inclusion3 decks59 decks
0%synergy
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