Koma, Cosmos Serpent (Commander) - Upgraded Control

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #296
23decks
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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Shared Roots
33%inclusion2 decks6 decks
31%synergy
High Synergy Cards
Elemental Bond
87%inclusion20 decks23 decks
81%synergy
Whelming Wave
87%inclusion20 decks23 decks
76%synergy
Adrix and Nev, Twincasters
78%inclusion18 decks23 decks
70%synergy
Spark Double
70%inclusion16 decks23 decks
60%synergy
Tribute to the World Tree
65%inclusion15 decks23 decks
59%synergy
Irenicus's Vile Duplication
61%inclusion14 decks23 decks
55%synergy
Parallel Lives
57%inclusion13 decks23 decks
51%synergy
Serpent of Yawning Depths
57%inclusion13 decks23 decks
50%synergy
Koma, World-Eater
61%inclusion14 decks23 decks
48%synergy
Skyshroud Claim
52%inclusion12 decks23 decks
43%synergy
Top Cards
Cultivate
78%inclusion18 decks23 decks
31%synergy
Counterspell
78%inclusion18 decks23 decks
28%synergy
Rampant Growth
70%inclusion16 decks23 decks
29%synergy
Farseek
65%inclusion15 decks23 decks
41%synergy
Beast Within
65%inclusion15 decks23 decks
15%synergy
Nature's Lore
65%inclusion15 decks23 decks
35%synergy
An Offer You Can't Refuse
61%inclusion14 decks23 decks
38%synergy
Kodama's Reach
57%inclusion13 decks23 decks
20%synergy
Three Visits
57%inclusion13 decks23 decks
33%synergy
Elvish Mystic
57%inclusion13 decks23 decks
32%synergy
Game Changers
Cyclonic Rift
48%inclusion11 decks23 decks
22%synergy
Seedborn Muse
35%inclusion8 decks23 decks
19%synergy
Fierce Guardianship
35%inclusion8 decks23 decks
18%synergy
Rhystic Study
30%inclusion7 decks23 decks
9%synergy
Consecrated Sphinx
13%inclusion3 decks23 decks
4%synergy
Force of Will
13%inclusion3 decks23 decks
3%synergy
The One Ring
8.7%inclusion2 decks23 decks
1%synergy
Creatures
Aesi, Tyrant of Gyre Strait
57%inclusion13 decks23 decks
39%synergy
Sakashima of a Thousand Faces
48%inclusion11 decks23 decks
43%synergy
Eternal Witness
43%inclusion10 decks23 decks
22%synergy
Junk Winder
43%inclusion10 decks23 decks
37%synergy
Llanowar Elves
43%inclusion10 decks23 decks
16%synergy
Craterhoof Behemoth
43%inclusion10 decks23 decks
34%synergy
Arixmethes, Slumbering Isle
43%inclusion10 decks23 decks
30%synergy
Sakura-Tribe Elder
43%inclusion10 decks23 decks
24%synergy
Spawning Kraken
43%inclusion10 decks23 decks
36%synergy
Tatyova, Benthic Druid
39%inclusion9 decks23 decks
8%synergy
Sakashima the Impostor
39%inclusion9 decks23 decks
36%synergy
Starwinder
36%inclusion5 decks14 decks
29%synergy
Enduring Curiosity
35%inclusion8 decks23 decks
32%synergy
Birds of Paradise
35%inclusion8 decks23 decks
7%synergy
Fyndhorn Elves
35%inclusion8 decks23 decks
19%synergy
Summon: Leviathan
33%inclusion6 decks18 decks
26%synergy
Garruk's Packleader
30%inclusion7 decks23 decks
28%synergy
Roaming Throne
26%inclusion6 decks23 decks
18%synergy
Hullbreaker Horror
26%inclusion6 decks23 decks
8%synergy
Uro, Titan of Nature's Wrath
26%inclusion6 decks23 decks
16%synergy
Scourge of Fleets
22%inclusion5 decks23 decks
14%synergy
Fanatic of Rhonas
22%inclusion5 decks23 decks
16%synergy
Octomancer
17%inclusion4 decks23 decks
13%synergy
Disciple of Freyalise
17%inclusion4 decks23 decks
13%synergy
Enduring Vitality
17%inclusion4 decks23 decks
10%synergy
Murkfiend Liege
17%inclusion4 decks23 decks
3%synergy
Slinn Voda, the Rising Deep
17%inclusion4 decks23 decks
11%synergy
Archetype of Imagination
17%inclusion4 decks23 decks
13%synergy
Solemn Simulacrum
13%inclusion3 decks23 decks
7%synergy
Curiosity Crafter
13%inclusion3 decks23 decks
10%synergy
Circle of Dreams Druid
13%inclusion3 decks23 decks
11%synergy
Hydroelectric Specimen
13%inclusion3 decks23 decks
7%synergy
Lotus Cobra
13%inclusion3 decks23 decks
-1%synergy
Tireless Provisioner
13%inclusion3 decks23 decks
-2%synergy
Gala Greeters
13%inclusion3 decks23 decks
11%synergy
Oviya, Automech Artisan
9.1%inclusion2 decks22 decks
7%synergy
Maraleaf Pixie
8.7%inclusion2 decks23 decks
3%synergy
Reclamation Sage
8.7%inclusion2 decks23 decks
-6%synergy
Insidious Fungus
8.7%inclusion2 decks23 decks
6%synergy
Troyan, Gutsy Explorer
8.7%inclusion2 decks23 decks
5%synergy
Brinelin, the Moon Kraken
8.7%inclusion2 decks23 decks
4%synergy
Yeva, Nature's Herald
8.7%inclusion2 decks23 decks
8%synergy
Phyrexian Metamorph
8.7%inclusion2 decks23 decks
0%synergy
Wayward Swordtooth
8.7%inclusion2 decks23 decks
5%synergy
Saryth, the Viper's Fang
8.7%inclusion2 decks23 decks
7%synergy
Fierce Empath
8.7%inclusion2 decks23 decks
6%synergy
Tangled Florahedron
8.7%inclusion2 decks23 decks
7%synergy
Vizier of Many Faces
8.7%inclusion2 decks23 decks
8%synergy
Coiling Oracle
8.7%inclusion2 decks23 decks
-5%synergy
Stormsurge Kraken
8.7%inclusion2 decks23 decks
4%synergy
Instants
Arcane Denial
57%inclusion13 decks23 decks
34%synergy
Growth Spiral
52%inclusion12 decks23 decks
8%synergy
Rapid Hybridization
43%inclusion10 decks23 decks
17%synergy
Pongify
39%inclusion9 decks23 decks
14%synergy
Heroic Intervention
39%inclusion9 decks23 decks
9%synergy
Return of the Wildspeaker
39%inclusion9 decks23 decks
29%synergy
Negate
39%inclusion9 decks23 decks
13%synergy
Planar Genesis
39%inclusion9 decks23 decks
28%synergy
Reality Shift
35%inclusion8 decks23 decks
20%synergy
Mana Drain
35%inclusion8 decks23 decks
19%synergy
Double Major
35%inclusion8 decks23 decks
26%synergy
Stubborn Denial
30%inclusion7 decks23 decks
28%synergy
Harrow
30%inclusion7 decks23 decks
18%synergy
Swan Song
30%inclusion7 decks23 decks
11%synergy
Entish Restoration
26%inclusion6 decks23 decks
17%synergy
Tamiyo's Safekeeping
26%inclusion6 decks23 decks
20%synergy
Sink into Stupor
26%inclusion6 decks23 decks
15%synergy
Brainstorm
22%inclusion5 decks23 decks
7%synergy
Eureka Moment
17%inclusion4 decks23 decks
6%synergy
Decisive Denial
17%inclusion4 decks23 decks
12%synergy
Plasm Capture
17%inclusion4 decks23 decks
14%synergy
Second Harvest
17%inclusion4 decks23 decks
11%synergy
Chord of Calling
17%inclusion4 decks23 decks
10%synergy
Nature's Claim
17%inclusion4 decks23 decks
7%synergy
Resculpt
17%inclusion4 decks23 decks
11%synergy
Slip Out the Back
17%inclusion4 decks23 decks
14%synergy
Rewind
17%inclusion4 decks23 decks
14%synergy
Collective Resistance
17%inclusion4 decks23 decks
14%synergy
Voidslime
17%inclusion4 decks23 decks
12%synergy
Auroral Procession
15%inclusion3 decks20 decks
11%synergy
Muddle the Mixture
13%inclusion3 decks23 decks
9%synergy
Frantic Search
13%inclusion3 decks23 decks
7%synergy
Snakeskin Veil
13%inclusion3 decks23 decks
7%synergy
Three Steps Ahead
13%inclusion3 decks23 decks
10%synergy
Archdruid's Charm
13%inclusion3 decks23 decks
7%synergy
Krosan Grip
13%inclusion3 decks23 decks
5%synergy
Tyvar's Stand
13%inclusion3 decks23 decks
10%synergy
Flare of Denial
13%inclusion3 decks23 decks
10%synergy
Aetherize
13%inclusion3 decks23 decks
1%synergy
Strix Serenade
13%inclusion3 decks23 decks
9%synergy
Joint Exploration
13%inclusion3 decks23 decks
7%synergy
Force of Negation
13%inclusion3 decks23 decks
5%synergy
Simic Charm
13%inclusion3 decks23 decks
5%synergy
Abjure
13%inclusion3 decks23 decks
12%synergy
Fog
8.7%inclusion2 decks23 decks
5%synergy
Refute
8.7%inclusion2 decks23 decks
7%synergy
Sublime Epiphany
8.7%inclusion2 decks23 decks
7%synergy
Force of Vigor
8.7%inclusion2 decks23 decks
4%synergy
Roiling Regrowth
8.7%inclusion2 decks23 decks
5%synergy
Dispel
8.7%inclusion2 decks23 decks
4%synergy
Sorceries
Quantum Misalignment
39%inclusion9 decks23 decks
36%synergy
Migration Path
26%inclusion6 decks23 decks
23%synergy
Ponder
17%inclusion4 decks23 decks
10%synergy
Explore
17%inclusion4 decks23 decks
-3%synergy
Urban Evolution
17%inclusion4 decks23 decks
8%synergy
Bala Ged Recovery
17%inclusion4 decks23 decks
7%synergy
Overwhelming Stampede
17%inclusion4 decks23 decks
5%synergy
Consuming Tide
13%inclusion3 decks23 decks
11%synergy
Into the North
13%inclusion3 decks23 decks
12%synergy
Triumph of the Hordes
13%inclusion3 decks23 decks
10%synergy
Lórien Revealed
13%inclusion3 decks23 decks
10%synergy
Bridgeworks Battle
13%inclusion3 decks23 decks
8%synergy
Preordain
13%inclusion3 decks23 decks
5%synergy
Shamanic Revelation
13%inclusion3 decks23 decks
8%synergy
Regrowth
13%inclusion3 decks23 decks
9%synergy
Windfall
8.7%inclusion2 decks23 decks
5%synergy
Replication Technique
8.7%inclusion2 decks23 decks
5%synergy
Flare of Cultivation
8.7%inclusion2 decks23 decks
7%synergy
Stolen Identity
8.7%inclusion2 decks23 decks
8%synergy
Last March of the Ents
8.7%inclusion2 decks23 decks
5%synergy
Sea Gate Restoration
8.7%inclusion2 decks23 decks
3%synergy
Harmonize
8.7%inclusion2 decks23 decks
3%synergy
Rally the Galadhrim
8.7%inclusion2 decks23 decks
7%synergy
Broken Bond
8.7%inclusion2 decks23 decks
4%synergy
Rishkar's Expertise
8.7%inclusion2 decks23 decks
0%synergy
Search for Tomorrow
8.7%inclusion2 decks23 decks
4%synergy
Ravenform
8.7%inclusion2 decks23 decks
4%synergy
Open the Way
8.7%inclusion2 decks23 decks
6%synergy
Analyze the Pollen
8.7%inclusion2 decks23 decks
8%synergy
Glimpse the Core
8.7%inclusion2 decks23 decks
8%synergy
Rite of Replication
8.7%inclusion2 decks23 decks
1%synergy
Utility Artifacts
Lightning Greaves
43%inclusion10 decks23 decks
22%synergy
Swiftfoot Boots
26%inclusion6 decks23 decks
0%synergy
Emerald Medallion
26%inclusion6 decks23 decks
23%synergy
Mirror Box
22%inclusion5 decks23 decks
18%synergy
Helm of the Host
22%inclusion5 decks23 decks
16%synergy
Combine Chrysalis
17%inclusion4 decks23 decks
13%synergy
Sapphire Medallion
17%inclusion4 decks23 decks
14%synergy
Proteus Staff
8.7%inclusion2 decks23 decks
9%synergy
Enchantments
Kindred Discovery
52%inclusion12 decks23 decks
42%synergy
Doubling Season
48%inclusion11 decks23 decks
38%synergy
Wild Growth
26%inclusion6 decks23 decks
17%synergy
Mystic Remora
26%inclusion6 decks23 decks
11%synergy
Verity Circle
22%inclusion5 decks23 decks
21%synergy
Primal Vigor
22%inclusion5 decks23 decks
19%synergy
Cryptolith Rite
17%inclusion4 decks23 decks
14%synergy
Opposition
17%inclusion4 decks23 decks
17%synergy
Propaganda
17%inclusion4 decks23 decks
11%synergy
Growing Rites of Itlimoc
17%inclusion4 decks23 decks
11%synergy
Impostor Syndrome
15%inclusion2 decks13 decks
13%synergy
Beastmaster Ascension
13%inclusion3 decks23 decks
10%synergy
Wilderness Reclamation
13%inclusion3 decks23 decks
4%synergy
Kenrith's Transformation
13%inclusion3 decks23 decks
9%synergy
Dismiss into Dream
13%inclusion3 decks23 decks
13%synergy
Utopia Sprawl
8.7%inclusion2 decks23 decks
2%synergy
Exploration
8.7%inclusion2 decks23 decks
-5%synergy
Garruk's Uprising
8.7%inclusion2 decks23 decks
-8%synergy
Imprisoned in the Moon
8.7%inclusion2 decks23 decks
5%synergy
Mana Reflection
8.7%inclusion2 decks23 decks
4%synergy
Khalni Heart Expedition
8.7%inclusion2 decks23 decks
5%synergy
Paradox Haze
8.7%inclusion2 decks23 decks
8%synergy
Defense of the Heart
8.7%inclusion2 decks23 decks
6%synergy
Moonlit Meditation
7.1%inclusion1 decks14 decks
6%synergy
Planeswalkers
Oko, Thief of Crowns
26%inclusion6 decks23 decks
19%synergy
Utility Lands
Reliquary Tower
52%inclusion12 decks23 decks
2%synergy
Mystic Sanctuary
39%inclusion9 decks23 decks
27%synergy
Temple of the False God
35%inclusion8 decks23 decks
19%synergy
Mosswort Bridge
26%inclusion6 decks23 decks
9%synergy
Command Beacon
26%inclusion6 decks23 decks
22%synergy
Yavimaya, Cradle of Growth
26%inclusion6 decks23 decks
4%synergy
Boseiju, Who Endures
26%inclusion6 decks23 decks
4%synergy
Otawara, Soaring City
26%inclusion6 decks23 decks
7%synergy
Alchemist's Refuge
22%inclusion5 decks23 decks
4%synergy
Evendo, Waking Haven
14%inclusion2 decks14 decks
9%synergy
Thespian's Stage
13%inclusion3 decks23 decks
6%synergy
Dark Depths
13%inclusion3 decks23 decks
6%synergy
Castle Vantress
13%inclusion3 decks23 decks
6%synergy
Three Tree City
13%inclusion3 decks23 decks
8%synergy
Castle Garenbrig
13%inclusion3 decks23 decks
8%synergy
Mistrise Village
10%inclusion2 decks20 decks
-1%synergy
War Room
8.7%inclusion2 decks23 decks
7%synergy
Lumbering Falls
8.7%inclusion2 decks23 decks
2%synergy
Oran-Rief, the Vastwood
8.7%inclusion2 decks23 decks
4%synergy
Rogue's Passage
8.7%inclusion2 decks23 decks
-13%synergy
Bonders' Enclave
8.7%inclusion2 decks23 decks
7%synergy
Mana Artifacts
Sol Ring
91%inclusion21 decks23 decks
11%synergy
Arcane Signet
65%inclusion15 decks23 decks
2%synergy
Talisman of Curiosity
26%inclusion6 decks23 decks
5%synergy
Thought Vessel
22%inclusion5 decks23 decks
1%synergy
Simic Signet
17%inclusion4 decks23 decks
-15%synergy
Thran Dynamo
17%inclusion4 decks23 decks
15%synergy
Fellwar Stone
13%inclusion3 decks23 decks
4%synergy
Replicating Ring
8.7%inclusion2 decks23 decks
7%synergy
Lotus Petal
8.7%inclusion2 decks23 decks
2%synergy
Lands
Command Tower
96%inclusion22 decks23 decks
10%synergy
Island
91%inclusion21 decks23 decks
-4%synergy
Forest
91%inclusion21 decks23 decks
-4%synergy
Hinterland Harbor
87%inclusion20 decks23 decks
28%synergy
Yavimaya Coast
78%inclusion18 decks23 decks
26%synergy
Dreamroot Cascade
61%inclusion14 decks23 decks
19%synergy
Vineglimmer Snarl
57%inclusion13 decks23 decks
18%synergy
Rejuvenating Springs
57%inclusion13 decks23 decks
13%synergy
Breeding Pool
52%inclusion12 decks23 decks
7%synergy
Flooded Grove
52%inclusion12 decks23 decks
11%synergy
Temple of Mystery
48%inclusion11 decks23 decks
9%synergy
Simic Growth Chamber
39%inclusion9 decks23 decks
-9%synergy
Misty Rainforest
39%inclusion9 decks23 decks
8%synergy
Barkchannel Pathway
39%inclusion9 decks23 decks
19%synergy
Hedge Maze
39%inclusion9 decks23 decks
20%synergy
Waterlogged Grove
35%inclusion8 decks23 decks
14%synergy
Tangled Islet
30%inclusion7 decks23 decks
14%synergy
Willowrush Verge
27%inclusion6 decks22 decks
11%synergy
Myriad Landscape
26%inclusion6 decks23 decks
4%synergy
Exotic Orchard
26%inclusion6 decks23 decks
2%synergy
Sink into Stupor
26%inclusion6 decks23 decks
15%synergy
Rimewood Falls
22%inclusion5 decks23 decks
12%synergy
Disciple of Freyalise
17%inclusion4 decks23 decks
13%synergy
Littjara Mirrorlake
17%inclusion4 decks23 decks
13%synergy
Snow-Covered Forest
17%inclusion4 decks23 decks
11%synergy
Tropical Island
17%inclusion4 decks23 decks
3%synergy
Evolving Wilds
17%inclusion4 decks23 decks
-8%synergy
Bala Ged Recovery
17%inclusion4 decks23 decks
7%synergy
Fabled Passage
13%inclusion3 decks23 decks
-1%synergy
Hydroelectric Specimen
13%inclusion3 decks23 decks
7%synergy
Snow-Covered Island
13%inclusion3 decks23 decks
6%synergy
Bridgeworks Battle
13%inclusion3 decks23 decks
8%synergy
Path of Ancestry
13%inclusion3 decks23 decks
-4%synergy
Blighted Woodland
8.7%inclusion2 decks23 decks
1%synergy
Prismatic Vista
8.7%inclusion2 decks23 decks
1%synergy
Windswept Heath
8.7%inclusion2 decks23 decks
-2%synergy
Sea Gate Restoration
8.7%inclusion2 decks23 decks
3%synergy
Tangled Florahedron
8.7%inclusion2 decks23 decks
7%synergy
Wooded Foothills
8.7%inclusion2 decks23 decks
-1%synergy
Verdant Catacombs
8.7%inclusion2 decks23 decks
-1%synergy
Botanical Sanctum
8.7%inclusion2 decks23 decks
-4%synergy
Demolition Field
8.7%inclusion2 decks23 decks
6%synergy
Plaza of Heroes
8.7%inclusion2 decks23 decks
7%synergy
Glasspool Mimic
8.7%inclusion2 decks23 decks
4%synergy
Polluted Delta
8.7%inclusion2 decks23 decks
-2%synergy
Flooded Strand
8.7%inclusion2 decks23 decks
-2%synergy
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