Koma, Cosmos Serpent (Commander) - Upgraded Control

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #306
26decks
As CommanderAs CardAverage DeckDecks
Bracket
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Budget
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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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Sodden Verdure
100%inclusion1 decks1 decks
97%synergy
Shared Roots
15%inclusion2 decks13 decks
12%synergy
Spirit Water Revival
7.7%inclusion1 decks13 decks
7%synergy
Badgermole Cub
7.1%inclusion1 decks14 decks
2%synergy
The Unagi of Kyoshi Island
7.1%inclusion1 decks14 decks
2%synergy
High Synergy Cards
Elemental Bond
85%inclusion22 decks26 decks
79%synergy
Whelming Wave
81%inclusion21 decks26 decks
70%synergy
Adrix and Nev, Twincasters
73%inclusion19 decks26 decks
65%synergy
Spark Double
69%inclusion18 decks26 decks
60%synergy
Irenicus's Vile Duplication
65%inclusion17 decks26 decks
59%synergy
Tribute to the World Tree
65%inclusion17 decks26 decks
59%synergy
Parallel Lives
54%inclusion14 decks26 decks
48%synergy
Farseek
69%inclusion18 decks26 decks
44%synergy
Serpent of Yawning Depths
50%inclusion13 decks26 decks
44%synergy
An Offer You Can't Refuse
65%inclusion17 decks26 decks
42%synergy
Top Cards
Counterspell
81%inclusion21 decks26 decks
31%synergy
Cultivate
73%inclusion19 decks26 decks
26%synergy
Rampant Growth
69%inclusion18 decks26 decks
29%synergy
Nature's Lore
65%inclusion17 decks26 decks
35%synergy
Beast Within
62%inclusion16 decks26 decks
12%synergy
Three Visits
58%inclusion15 decks26 decks
35%synergy
Elvish Mystic
58%inclusion15 decks26 decks
34%synergy
Rapid Hybridization
54%inclusion14 decks26 decks
28%synergy
Kodama's Reach
54%inclusion14 decks26 decks
18%synergy
Koma, World-Eater
54%inclusion14 decks26 decks
41%synergy
Game Changers
Cyclonic Rift
42%inclusion11 decks26 decks
17%synergy
Seedborn Muse
35%inclusion9 decks26 decks
19%synergy
Fierce Guardianship
31%inclusion8 decks26 decks
13%synergy
Rhystic Study
27%inclusion7 decks26 decks
5%synergy
Consecrated Sphinx
12%inclusion3 decks26 decks
3%synergy
Force of Will
12%inclusion3 decks26 decks
1%synergy
The One Ring
7.7%inclusion2 decks26 decks
0%synergy
Gaea's Cradle
7.7%inclusion2 decks26 decks
0%synergy
Worldly Tutor
7.7%inclusion2 decks26 decks
-8%synergy
Creatures
Aesi, Tyrant of Gyre Strait
50%inclusion13 decks26 decks
33%synergy
Junk Winder
46%inclusion12 decks26 decks
40%synergy
Llanowar Elves
46%inclusion12 decks26 decks
18%synergy
Sakashima of a Thousand Faces
46%inclusion12 decks26 decks
41%synergy
Summon: Leviathan
43%inclusion9 decks21 decks
36%synergy
Craterhoof Behemoth
42%inclusion11 decks26 decks
33%synergy
Sakashima the Impostor
42%inclusion11 decks26 decks
40%synergy
Arixmethes, Slumbering Isle
42%inclusion11 decks26 decks
29%synergy
Starwinder
41%inclusion7 decks17 decks
35%synergy
Eternal Witness
38%inclusion10 decks26 decks
18%synergy
Birds of Paradise
38%inclusion10 decks26 decks
11%synergy
Sakura-Tribe Elder
38%inclusion10 decks26 decks
19%synergy
Spawning Kraken
38%inclusion10 decks26 decks
31%synergy
Tatyova, Benthic Druid
35%inclusion9 decks26 decks
4%synergy
Fyndhorn Elves
35%inclusion9 decks26 decks
19%synergy
Enduring Curiosity
31%inclusion8 decks26 decks
28%synergy
Garruk's Packleader
27%inclusion7 decks26 decks
25%synergy
Roaming Throne
27%inclusion7 decks26 decks
19%synergy
Uro, Titan of Nature's Wrath
27%inclusion7 decks26 decks
17%synergy
Hullbreaker Horror
23%inclusion6 decks26 decks
5%synergy
Octomancer
19%inclusion5 decks26 decks
14%synergy
Enduring Vitality
19%inclusion5 decks26 decks
12%synergy
Archetype of Imagination
19%inclusion5 decks26 decks
15%synergy
Scourge of Fleets
19%inclusion5 decks26 decks
11%synergy
Slinn Voda, the Rising Deep
19%inclusion5 decks26 decks
13%synergy
Fanatic of Rhonas
19%inclusion5 decks26 decks
13%synergy
Disciple of Freyalise
15%inclusion4 decks26 decks
11%synergy
Murkfiend Liege
15%inclusion4 decks26 decks
1%synergy
Gala Greeters
15%inclusion4 decks26 decks
14%synergy
Solemn Simulacrum
12%inclusion3 decks26 decks
5%synergy
Curiosity Crafter
12%inclusion3 decks26 decks
8%synergy
Circle of Dreams Druid
12%inclusion3 decks26 decks
9%synergy
Pollywog Prodigy
12%inclusion3 decks26 decks
5%synergy
Tangled Florahedron
12%inclusion3 decks26 decks
10%synergy
Vizier of Many Faces
12%inclusion3 decks26 decks
11%synergy
Hydroelectric Specimen
12%inclusion3 decks26 decks
5%synergy
Lotus Cobra
12%inclusion3 decks26 decks
-2%synergy
Tireless Provisioner
12%inclusion3 decks26 decks
-4%synergy
Mockingbird
12%inclusion3 decks26 decks
8%synergy
Oviya, Automech Artisan
8.0%inclusion2 decks25 decks
6%synergy
Maraleaf Pixie
7.7%inclusion2 decks26 decks
2%synergy
Icebreaker Kraken
7.7%inclusion2 decks26 decks
6%synergy
Reclamation Sage
7.7%inclusion2 decks26 decks
-6%synergy
Insidious Fungus
7.7%inclusion2 decks26 decks
5%synergy
Kiora's Follower
7.7%inclusion2 decks26 decks
-7%synergy
Troyan, Gutsy Explorer
7.7%inclusion2 decks26 decks
5%synergy
Phyrexian Metamorph
7.7%inclusion2 decks26 decks
-1%synergy
Brinelin, the Moon Kraken
7.7%inclusion2 decks26 decks
3%synergy
Yeva, Nature's Herald
7.7%inclusion2 decks26 decks
7%synergy
Wayward Swordtooth
7.7%inclusion2 decks26 decks
4%synergy
Instants
Arcane Denial
54%inclusion14 decks26 decks
31%synergy
Growth Spiral
46%inclusion12 decks26 decks
2%synergy
Pongify
42%inclusion11 decks26 decks
17%synergy
Negate
42%inclusion11 decks26 decks
16%synergy
Heroic Intervention
38%inclusion10 decks26 decks
8%synergy
Planar Genesis
38%inclusion10 decks26 decks
28%synergy
Return of the Wildspeaker
35%inclusion9 decks26 decks
24%synergy
Stubborn Denial
35%inclusion9 decks26 decks
32%synergy
Mana Drain
35%inclusion9 decks26 decks
19%synergy
Double Major
35%inclusion9 decks26 decks
26%synergy
Harrow
31%inclusion8 decks26 decks
19%synergy
Reality Shift
31%inclusion8 decks26 decks
16%synergy
Swan Song
31%inclusion8 decks26 decks
12%synergy
Entish Restoration
27%inclusion7 decks26 decks
18%synergy
Tamiyo's Safekeeping
27%inclusion7 decks26 decks
21%synergy
Nature's Claim
23%inclusion6 decks26 decks
13%synergy
Second Harvest
19%inclusion5 decks26 decks
13%synergy
Plasm Capture
19%inclusion5 decks26 decks
16%synergy
Brainstorm
19%inclusion5 decks26 decks
5%synergy
Krosan Grip
19%inclusion5 decks26 decks
11%synergy
Sink into Stupor
19%inclusion5 decks26 decks
8%synergy
Eureka Moment
15%inclusion4 decks26 decks
5%synergy
Frantic Search
15%inclusion4 decks26 decks
10%synergy
Snakeskin Veil
15%inclusion4 decks26 decks
10%synergy
Three Steps Ahead
15%inclusion4 decks26 decks
13%synergy
Decisive Denial
15%inclusion4 decks26 decks
10%synergy
Resculpt
15%inclusion4 decks26 decks
9%synergy
Slip Out the Back
15%inclusion4 decks26 decks
12%synergy
Chord of Calling
15%inclusion4 decks26 decks
8%synergy
Rewind
15%inclusion4 decks26 decks
13%synergy
Voidslime
15%inclusion4 decks26 decks
10%synergy
Auroral Procession
13%inclusion3 decks23 decks
9%synergy
Consult the Star Charts
12%inclusion2 decks17 decks
10%synergy
Muddle the Mixture
12%inclusion3 decks26 decks
7%synergy
Tyvar's Stand
12%inclusion3 decks26 decks
9%synergy
Flare of Denial
12%inclusion3 decks26 decks
8%synergy
Mystic Reflection
12%inclusion3 decks26 decks
9%synergy
Force of Vigor
12%inclusion3 decks26 decks
7%synergy
Simic Charm
12%inclusion3 decks26 decks
4%synergy
Dispel
12%inclusion3 decks26 decks
7%synergy
Aetherize
12%inclusion3 decks26 decks
0%synergy
Disallow
12%inclusion3 decks26 decks
10%synergy
Joint Exploration
12%inclusion3 decks26 decks
6%synergy
Force of Negation
12%inclusion3 decks26 decks
3%synergy
Collective Resistance
12%inclusion3 decks26 decks
8%synergy
Mana Leak
12%inclusion3 decks26 decks
9%synergy
Abjure
12%inclusion3 decks26 decks
11%synergy
Disdainful Stroke
7.7%inclusion2 decks26 decks
6%synergy
Fog
7.7%inclusion2 decks26 decks
4%synergy
Opt
7.7%inclusion2 decks26 decks
0%synergy
Sorceries
Skyshroud Claim
50%inclusion13 decks26 decks
41%synergy
Quantum Misalignment
35%inclusion9 decks26 decks
32%synergy
Migration Path
27%inclusion7 decks26 decks
24%synergy
Explore
19%inclusion5 decks26 decks
-1%synergy
Overwhelming Stampede
19%inclusion5 decks26 decks
7%synergy
Ponder
15%inclusion4 decks26 decks
8%synergy
Bridgeworks Battle
15%inclusion4 decks26 decks
11%synergy
Urban Evolution
15%inclusion4 decks26 decks
6%synergy
Bala Ged Recovery
15%inclusion4 decks26 decks
5%synergy
Regrowth
15%inclusion4 decks26 decks
12%synergy
Replication Technique
12%inclusion3 decks26 decks
8%synergy
Consuming Tide
12%inclusion3 decks26 decks
9%synergy
Into the North
12%inclusion3 decks26 decks
10%synergy
Triumph of the Hordes
12%inclusion3 decks26 decks
9%synergy
Lórien Revealed
12%inclusion3 decks26 decks
9%synergy
Harmonize
12%inclusion3 decks26 decks
6%synergy
Preordain
12%inclusion3 decks26 decks
3%synergy
Windfall
7.7%inclusion2 decks26 decks
4%synergy
Flare of Cultivation
7.7%inclusion2 decks26 decks
6%synergy
Curse of the Swine
7.7%inclusion2 decks26 decks
-3%synergy
Stolen Identity
7.7%inclusion2 decks26 decks
7%synergy
Last March of the Ents
7.7%inclusion2 decks26 decks
4%synergy
Turntimber Symbiosis
7.7%inclusion2 decks26 decks
5%synergy
Rishkar's Expertise
7.7%inclusion2 decks26 decks
-1%synergy
Sea Gate Restoration
7.7%inclusion2 decks26 decks
2%synergy
Finale of Devastation
7.7%inclusion2 decks26 decks
-4%synergy
Rally the Galadhrim
7.7%inclusion2 decks26 decks
6%synergy
Broken Bond
7.7%inclusion2 decks26 decks
3%synergy
Search for Tomorrow
7.7%inclusion2 decks26 decks
3%synergy
Explosive Vegetation
7.7%inclusion2 decks26 decks
2%synergy
Shamanic Revelation
7.7%inclusion2 decks26 decks
2%synergy
Ravenform
7.7%inclusion2 decks26 decks
3%synergy
Open the Way
7.7%inclusion2 decks26 decks
5%synergy
Nissa's Pilgrimage
7.7%inclusion2 decks26 decks
6%synergy
Analyze the Pollen
7.7%inclusion2 decks26 decks
7%synergy
Raise the Palisade
7.7%inclusion2 decks26 decks
1%synergy
Glimpse the Core
7.7%inclusion2 decks26 decks
7%synergy
Rite of Replication
7.7%inclusion2 decks26 decks
0%synergy
Utility Artifacts
Lightning Greaves
42%inclusion11 decks26 decks
21%synergy
Swiftfoot Boots
27%inclusion7 decks26 decks
1%synergy
Mirror Box
23%inclusion6 decks26 decks
20%synergy
Emerald Medallion
23%inclusion6 decks26 decks
20%synergy
Helm of the Host
19%inclusion5 decks26 decks
14%synergy
Combine Chrysalis
15%inclusion4 decks26 decks
11%synergy
Sapphire Medallion
15%inclusion4 decks26 decks
12%synergy
Proteus Staff
7.7%inclusion2 decks26 decks
8%synergy
Skullclamp
7.7%inclusion2 decks26 decks
7%synergy
Eldrazi Monument
7.7%inclusion2 decks26 decks
7%synergy
Bident of Thassa
7.7%inclusion2 decks26 decks
0%synergy
Enchantments
Kindred Discovery
50%inclusion13 decks26 decks
40%synergy
Doubling Season
38%inclusion10 decks26 decks
29%synergy
Mystic Remora
35%inclusion9 decks26 decks
19%synergy
Verity Circle
23%inclusion6 decks26 decks
23%synergy
Wild Growth
23%inclusion6 decks26 decks
14%synergy
Growing Rites of Itlimoc
23%inclusion6 decks26 decks
17%synergy
Primal Vigor
19%inclusion5 decks26 decks
16%synergy
Cryptolith Rite
15%inclusion4 decks26 decks
12%synergy
Wilderness Reclamation
15%inclusion4 decks26 decks
6%synergy
Opposition
15%inclusion4 decks26 decks
15%synergy
Propaganda
15%inclusion4 decks26 decks
9%synergy
Impostor Syndrome
13%inclusion2 decks16 decks
11%synergy
Utopia Sprawl
12%inclusion3 decks26 decks
5%synergy
Dismiss into Dream
12%inclusion3 decks26 decks
11%synergy
Exploration
7.7%inclusion2 decks26 decks
-6%synergy
Beastmaster Ascension
7.7%inclusion2 decks26 decks
5%synergy
Garruk's Uprising
7.7%inclusion2 decks26 decks
-9%synergy
Imprisoned in the Moon
7.7%inclusion2 decks26 decks
4%synergy
Mana Reflection
7.7%inclusion2 decks26 decks
3%synergy
Kenrith's Transformation
7.7%inclusion2 decks26 decks
3%synergy
Khalni Heart Expedition
7.7%inclusion2 decks26 decks
4%synergy
Paradox Haze
7.7%inclusion2 decks26 decks
7%synergy
Defense of the Heart
7.7%inclusion2 decks26 decks
5%synergy
Moonlit Meditation
5.9%inclusion1 decks17 decks
5%synergy
Battles
Invasion of Zendikar
7.7%inclusion2 decks26 decks
6%synergy
Planeswalkers
Oko, Thief of Crowns
27%inclusion7 decks26 decks
20%synergy
Kiora, Master of the Depths
7.7%inclusion2 decks26 decks
5%synergy
Kiora, the Crashing Wave
7.7%inclusion2 decks26 decks
5%synergy
Utility Lands
Reliquary Tower
46%inclusion12 decks26 decks
-4%synergy
Mystic Sanctuary
35%inclusion9 decks26 decks
22%synergy
Temple of the False God
35%inclusion9 decks26 decks
19%synergy
Alchemist's Refuge
23%inclusion6 decks26 decks
6%synergy
Command Beacon
23%inclusion6 decks26 decks
19%synergy
Mosswort Bridge
23%inclusion6 decks26 decks
6%synergy
Yavimaya, Cradle of Growth
23%inclusion6 decks26 decks
1%synergy
Boseiju, Who Endures
23%inclusion6 decks26 decks
1%synergy
Otawara, Soaring City
23%inclusion6 decks26 decks
4%synergy
Dark Depths
15%inclusion4 decks26 decks
9%synergy
Mistrise Village
13%inclusion3 decks23 decks
2%synergy
Evendo, Waking Haven
12%inclusion2 decks17 decks
6%synergy
Thespian's Stage
12%inclusion3 decks26 decks
4%synergy
Castle Vantress
12%inclusion3 decks26 decks
5%synergy
Three Tree City
12%inclusion3 decks26 decks
6%synergy
Castle Garenbrig
12%inclusion3 decks26 decks
7%synergy
Bonders' Enclave
12%inclusion3 decks26 decks
10%synergy
Rivendell
7.7%inclusion2 decks26 decks
2%synergy
Scavenger Grounds
7.7%inclusion2 decks26 decks
3%synergy
War Room
7.7%inclusion2 decks26 decks
6%synergy
Oran-Rief, the Vastwood
7.7%inclusion2 decks26 decks
3%synergy
Emergence Zone
7.7%inclusion2 decks26 decks
4%synergy
Lumbering Falls
7.7%inclusion2 decks26 decks
1%synergy
Rogue's Passage
7.7%inclusion2 decks26 decks
-14%synergy
Mana Artifacts
Sol Ring
92%inclusion24 decks26 decks
12%synergy
Arcane Signet
65%inclusion17 decks26 decks
2%synergy
Talisman of Curiosity
31%inclusion8 decks26 decks
9%synergy
Simic Signet
23%inclusion6 decks26 decks
-9%synergy
Thought Vessel
23%inclusion6 decks26 decks
3%synergy
Fellwar Stone
15%inclusion4 decks26 decks
6%synergy
Thran Dynamo
15%inclusion4 decks26 decks
13%synergy
Replicating Ring
7.7%inclusion2 decks26 decks
6%synergy
Lands
Command Tower
96%inclusion25 decks26 decks
11%synergy
Island
92%inclusion24 decks26 decks
-3%synergy
Forest
92%inclusion24 decks26 decks
-3%synergy
Hinterland Harbor
85%inclusion22 decks26 decks
25%synergy
Yavimaya Coast
81%inclusion21 decks26 decks
28%synergy
Breeding Pool
58%inclusion15 decks26 decks
11%synergy
Vineglimmer Snarl
54%inclusion14 decks26 decks
15%synergy
Rejuvenating Springs
54%inclusion14 decks26 decks
10%synergy
Dreamroot Cascade
54%inclusion14 decks26 decks
12%synergy
Temple of Mystery
50%inclusion13 decks26 decks
12%synergy
Flooded Grove
50%inclusion13 decks26 decks
9%synergy
Simic Growth Chamber
38%inclusion10 decks26 decks
-10%synergy
Barkchannel Pathway
38%inclusion10 decks26 decks
18%synergy
Waterlogged Grove
38%inclusion10 decks26 decks
18%synergy
Hedge Maze
38%inclusion10 decks26 decks
19%synergy
Misty Rainforest
35%inclusion9 decks26 decks
3%synergy
Willowrush Verge
28%inclusion7 decks25 decks
11%synergy
Exotic Orchard
27%inclusion7 decks26 decks
3%synergy
Tangled Islet
27%inclusion7 decks26 decks
11%synergy
Myriad Landscape
23%inclusion6 decks26 decks
1%synergy
Rimewood Falls
23%inclusion6 decks26 decks
14%synergy
Snow-Covered Forest
19%inclusion5 decks26 decks
12%synergy
Tropical Island
19%inclusion5 decks26 decks
5%synergy
Evolving Wilds
19%inclusion5 decks26 decks
-6%synergy
Sink into Stupor
19%inclusion5 decks26 decks
8%synergy
Fabled Passage
15%inclusion4 decks26 decks
1%synergy
Disciple of Freyalise
15%inclusion4 decks26 decks
11%synergy
Littjara Mirrorlake
15%inclusion4 decks26 decks
12%synergy
Path of Ancestry
15%inclusion4 decks26 decks
-2%synergy
Snow-Covered Island
15%inclusion4 decks26 decks
9%synergy
Bridgeworks Battle
15%inclusion4 decks26 decks
11%synergy
Bala Ged Recovery
15%inclusion4 decks26 decks
5%synergy
Tangled Florahedron
12%inclusion3 decks26 decks
10%synergy
Hydroelectric Specimen
12%inclusion3 decks26 decks
5%synergy
Blighted Woodland
7.7%inclusion2 decks26 decks
0%synergy
Prismatic Vista
7.7%inclusion2 decks26 decks
0%synergy
Windswept Heath
7.7%inclusion2 decks26 decks
-3%synergy
Overflowing Basin
7.7%inclusion2 decks26 decks
-12%synergy
Verdant Catacombs
7.7%inclusion2 decks26 decks
-2%synergy
Turntimber Symbiosis
7.7%inclusion2 decks26 decks
5%synergy
Jwari Disruption
7.7%inclusion2 decks26 decks
6%synergy
Sea Gate Restoration
7.7%inclusion2 decks26 decks
2%synergy
Wooded Foothills
7.7%inclusion2 decks26 decks
-2%synergy
Flooded Strand
7.7%inclusion2 decks26 decks
-4%synergy
Botanical Sanctum
7.7%inclusion2 decks26 decks
-5%synergy
Demolition Field
7.7%inclusion2 decks26 decks
5%synergy
Plaza of Heroes
7.7%inclusion2 decks26 decks
6%synergy
Silundi Vision
7.7%inclusion2 decks26 decks
7%synergy
Glasspool Mimic
7.7%inclusion2 decks26 decks
3%synergy
Thornwood Falls
7.7%inclusion2 decks26 decks
-10%synergy
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