Koma, Cosmos Serpent (Commander) - Upgraded Control

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #298
24decks
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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Shared Roots
22%inclusion2 decks9 decks
19%synergy
Badgermole Cub
10%inclusion1 decks10 decks
6%synergy
High Synergy Cards
Elemental Bond
88%inclusion21 decks24 decks
82%synergy
Whelming Wave
88%inclusion21 decks24 decks
76%synergy
Adrix and Nev, Twincasters
75%inclusion18 decks24 decks
67%synergy
Spark Double
71%inclusion17 decks24 decks
61%synergy
Tribute to the World Tree
67%inclusion16 decks24 decks
60%synergy
Irenicus's Vile Duplication
63%inclusion15 decks24 decks
56%synergy
Parallel Lives
58%inclusion14 decks24 decks
52%synergy
Serpent of Yawning Depths
58%inclusion14 decks24 decks
52%synergy
Koma, World-Eater
58%inclusion14 decks24 decks
45%synergy
Farseek
67%inclusion16 decks24 decks
42%synergy
Top Cards
Cultivate
79%inclusion19 decks24 decks
32%synergy
Counterspell
79%inclusion19 decks24 decks
29%synergy
Rampant Growth
71%inclusion17 decks24 decks
30%synergy
An Offer You Can't Refuse
63%inclusion15 decks24 decks
39%synergy
Beast Within
63%inclusion15 decks24 decks
12%synergy
Nature's Lore
63%inclusion15 decks24 decks
32%synergy
Kodama's Reach
58%inclusion14 decks24 decks
22%synergy
Three Visits
54%inclusion13 decks24 decks
31%synergy
Elvish Mystic
54%inclusion13 decks24 decks
30%synergy
Aesi, Tyrant of Gyre Strait
54%inclusion13 decks24 decks
37%synergy
Game Changers
Cyclonic Rift
46%inclusion11 decks24 decks
20%synergy
Seedborn Muse
33%inclusion8 decks24 decks
18%synergy
Fierce Guardianship
33%inclusion8 decks24 decks
16%synergy
Rhystic Study
29%inclusion7 decks24 decks
7%synergy
Consecrated Sphinx
13%inclusion3 decks24 decks
4%synergy
Force of Will
13%inclusion3 decks24 decks
2%synergy
The One Ring
8.3%inclusion2 decks24 decks
1%synergy
Creatures
Starwinder
47%inclusion7 decks15 decks
40%synergy
Junk Winder
46%inclusion11 decks24 decks
39%synergy
Sakashima of a Thousand Faces
46%inclusion11 decks24 decks
41%synergy
Arixmethes, Slumbering Isle
46%inclusion11 decks24 decks
32%synergy
Spawning Kraken
46%inclusion11 decks24 decks
38%synergy
Summon: Leviathan
42%inclusion8 decks19 decks
35%synergy
Eternal Witness
42%inclusion10 decks24 decks
21%synergy
Llanowar Elves
42%inclusion10 decks24 decks
14%synergy
Craterhoof Behemoth
42%inclusion10 decks24 decks
32%synergy
Sakashima the Impostor
42%inclusion10 decks24 decks
39%synergy
Sakura-Tribe Elder
42%inclusion10 decks24 decks
22%synergy
Tatyova, Benthic Druid
38%inclusion9 decks24 decks
6%synergy
Enduring Curiosity
33%inclusion8 decks24 decks
30%synergy
Birds of Paradise
33%inclusion8 decks24 decks
6%synergy
Fyndhorn Elves
33%inclusion8 decks24 decks
18%synergy
Garruk's Packleader
29%inclusion7 decks24 decks
27%synergy
Roaming Throne
25%inclusion6 decks24 decks
17%synergy
Hullbreaker Horror
25%inclusion6 decks24 decks
7%synergy
Uro, Titan of Nature's Wrath
25%inclusion6 decks24 decks
15%synergy
Octomancer
21%inclusion5 decks24 decks
16%synergy
Scourge of Fleets
21%inclusion5 decks24 decks
13%synergy
Fanatic of Rhonas
21%inclusion5 decks24 decks
15%synergy
Disciple of Freyalise
17%inclusion4 decks24 decks
12%synergy
Enduring Vitality
17%inclusion4 decks24 decks
9%synergy
Murkfiend Liege
17%inclusion4 decks24 decks
2%synergy
Slinn Voda, the Rising Deep
17%inclusion4 decks24 decks
10%synergy
Archetype of Imagination
17%inclusion4 decks24 decks
12%synergy
Solemn Simulacrum
13%inclusion3 decks24 decks
6%synergy
Curiosity Crafter
13%inclusion3 decks24 decks
9%synergy
Circle of Dreams Druid
13%inclusion3 decks24 decks
10%synergy
Hydroelectric Specimen
13%inclusion3 decks24 decks
7%synergy
Lotus Cobra
13%inclusion3 decks24 decks
-1%synergy
Tireless Provisioner
13%inclusion3 decks24 decks
-3%synergy
Gala Greeters
13%inclusion3 decks24 decks
11%synergy
Oviya, Automech Artisan
8.7%inclusion2 decks23 decks
7%synergy
Maraleaf Pixie
8.3%inclusion2 decks24 decks
2%synergy
Icebreaker Kraken
8.3%inclusion2 decks24 decks
7%synergy
Reclamation Sage
8.3%inclusion2 decks24 decks
-6%synergy
Insidious Fungus
8.3%inclusion2 decks24 decks
6%synergy
Troyan, Gutsy Explorer
8.3%inclusion2 decks24 decks
5%synergy
Brinelin, the Moon Kraken
8.3%inclusion2 decks24 decks
4%synergy
Yeva, Nature's Herald
8.3%inclusion2 decks24 decks
8%synergy
Phyrexian Metamorph
8.3%inclusion2 decks24 decks
0%synergy
Wayward Swordtooth
8.3%inclusion2 decks24 decks
5%synergy
Saryth, the Viper's Fang
8.3%inclusion2 decks24 decks
7%synergy
Fierce Empath
8.3%inclusion2 decks24 decks
6%synergy
Tangled Florahedron
8.3%inclusion2 decks24 decks
7%synergy
Vizier of Many Faces
8.3%inclusion2 decks24 decks
8%synergy
Stormsurge Kraken
8.3%inclusion2 decks24 decks
4%synergy
Colossal Skyturtle
8.3%inclusion2 decks24 decks
3%synergy
Instants
Arcane Denial
54%inclusion13 decks24 decks
32%synergy
Growth Spiral
50%inclusion12 decks24 decks
6%synergy
Rapid Hybridization
46%inclusion11 decks24 decks
20%synergy
Negate
42%inclusion10 decks24 decks
16%synergy
Pongify
38%inclusion9 decks24 decks
13%synergy
Heroic Intervention
38%inclusion9 decks24 decks
7%synergy
Return of the Wildspeaker
38%inclusion9 decks24 decks
27%synergy
Planar Genesis
38%inclusion9 decks24 decks
27%synergy
Double Major
38%inclusion9 decks24 decks
29%synergy
Reality Shift
33%inclusion8 decks24 decks
19%synergy
Mana Drain
33%inclusion8 decks24 decks
18%synergy
Stubborn Denial
29%inclusion7 decks24 decks
27%synergy
Harrow
29%inclusion7 decks24 decks
17%synergy
Entish Restoration
29%inclusion7 decks24 decks
20%synergy
Swan Song
29%inclusion7 decks24 decks
10%synergy
Tamiyo's Safekeeping
25%inclusion6 decks24 decks
19%synergy
Sink into Stupor
25%inclusion6 decks24 decks
14%synergy
Plasm Capture
21%inclusion5 decks24 decks
17%synergy
Brainstorm
21%inclusion5 decks24 decks
6%synergy
Second Harvest
21%inclusion5 decks24 decks
14%synergy
Nature's Claim
21%inclusion5 decks24 decks
11%synergy
Eureka Moment
17%inclusion4 decks24 decks
6%synergy
Snakeskin Veil
17%inclusion4 decks24 decks
11%synergy
Three Steps Ahead
17%inclusion4 decks24 decks
14%synergy
Decisive Denial
17%inclusion4 decks24 decks
12%synergy
Krosan Grip
17%inclusion4 decks24 decks
9%synergy
Chord of Calling
17%inclusion4 decks24 decks
9%synergy
Resculpt
17%inclusion4 decks24 decks
11%synergy
Slip Out the Back
17%inclusion4 decks24 decks
13%synergy
Rewind
17%inclusion4 decks24 decks
14%synergy
Collective Resistance
17%inclusion4 decks24 decks
13%synergy
Voidslime
17%inclusion4 decks24 decks
12%synergy
Auroral Procession
14%inclusion3 decks21 decks
11%synergy
Muddle the Mixture
13%inclusion3 decks24 decks
8%synergy
Frantic Search
13%inclusion3 decks24 decks
7%synergy
Archdruid's Charm
13%inclusion3 decks24 decks
6%synergy
Tyvar's Stand
13%inclusion3 decks24 decks
10%synergy
Flare of Denial
13%inclusion3 decks24 decks
9%synergy
Aetherize
13%inclusion3 decks24 decks
1%synergy
Joint Exploration
13%inclusion3 decks24 decks
7%synergy
Force of Negation
13%inclusion3 decks24 decks
4%synergy
Simic Charm
13%inclusion3 decks24 decks
4%synergy
Abjure
13%inclusion3 decks24 decks
12%synergy
Disdainful Stroke
8.3%inclusion2 decks24 decks
7%synergy
Fog
8.3%inclusion2 decks24 decks
5%synergy
Refute
8.3%inclusion2 decks24 decks
6%synergy
Mystic Reflection
8.3%inclusion2 decks24 decks
6%synergy
Sublime Epiphany
8.3%inclusion2 decks24 decks
6%synergy
Force of Vigor
8.3%inclusion2 decks24 decks
4%synergy
Roiling Regrowth
8.3%inclusion2 decks24 decks
4%synergy
Sorceries
Skyshroud Claim
50%inclusion12 decks24 decks
41%synergy
Quantum Misalignment
38%inclusion9 decks24 decks
35%synergy
Migration Path
25%inclusion6 decks24 decks
22%synergy
Explore
21%inclusion5 decks24 decks
0%synergy
Ponder
17%inclusion4 decks24 decks
10%synergy
Bridgeworks Battle
17%inclusion4 decks24 decks
12%synergy
Urban Evolution
17%inclusion4 decks24 decks
7%synergy
Bala Ged Recovery
17%inclusion4 decks24 decks
7%synergy
Overwhelming Stampede
17%inclusion4 decks24 decks
4%synergy
Replication Technique
13%inclusion3 decks24 decks
9%synergy
Consuming Tide
13%inclusion3 decks24 decks
10%synergy
Into the North
13%inclusion3 decks24 decks
11%synergy
Triumph of the Hordes
13%inclusion3 decks24 decks
10%synergy
Lórien Revealed
13%inclusion3 decks24 decks
10%synergy
Preordain
13%inclusion3 decks24 decks
4%synergy
Shamanic Revelation
13%inclusion3 decks24 decks
7%synergy
Regrowth
13%inclusion3 decks24 decks
9%synergy
Windfall
8.3%inclusion2 decks24 decks
4%synergy
Flare of Cultivation
8.3%inclusion2 decks24 decks
6%synergy
Stolen Identity
8.3%inclusion2 decks24 decks
8%synergy
Last March of the Ents
8.3%inclusion2 decks24 decks
5%synergy
Sea Gate Restoration
8.3%inclusion2 decks24 decks
3%synergy
Curse of the Swine
8.3%inclusion2 decks24 decks
-3%synergy
Harmonize
8.3%inclusion2 decks24 decks
3%synergy
Rally the Galadhrim
8.3%inclusion2 decks24 decks
7%synergy
Broken Bond
8.3%inclusion2 decks24 decks
3%synergy
Rishkar's Expertise
8.3%inclusion2 decks24 decks
0%synergy
Search for Tomorrow
8.3%inclusion2 decks24 decks
4%synergy
Ravenform
8.3%inclusion2 decks24 decks
4%synergy
Open the Way
8.3%inclusion2 decks24 decks
6%synergy
Analyze the Pollen
8.3%inclusion2 decks24 decks
8%synergy
Glimpse the Core
8.3%inclusion2 decks24 decks
8%synergy
Rite of Replication
8.3%inclusion2 decks24 decks
1%synergy
Utility Artifacts
Lightning Greaves
46%inclusion11 decks24 decks
24%synergy
Mirror Box
25%inclusion6 decks24 decks
22%synergy
Swiftfoot Boots
25%inclusion6 decks24 decks
-1%synergy
Emerald Medallion
25%inclusion6 decks24 decks
22%synergy
Helm of the Host
21%inclusion5 decks24 decks
16%synergy
Combine Chrysalis
17%inclusion4 decks24 decks
12%synergy
Sapphire Medallion
17%inclusion4 decks24 decks
13%synergy
Proteus Staff
8.3%inclusion2 decks24 decks
8%synergy
Enchantments
Kindred Discovery
50%inclusion12 decks24 decks
40%synergy
Doubling Season
46%inclusion11 decks24 decks
36%synergy
Mystic Remora
29%inclusion7 decks24 decks
14%synergy
Wild Growth
25%inclusion6 decks24 decks
16%synergy
Verity Circle
21%inclusion5 decks24 decks
20%synergy
Primal Vigor
21%inclusion5 decks24 decks
18%synergy
Cryptolith Rite
17%inclusion4 decks24 decks
14%synergy
Opposition
17%inclusion4 decks24 decks
16%synergy
Propaganda
17%inclusion4 decks24 decks
10%synergy
Growing Rites of Itlimoc
17%inclusion4 decks24 decks
11%synergy
Impostor Syndrome
14%inclusion2 decks14 decks
12%synergy
Moonlit Meditation
13%inclusion2 decks15 decks
12%synergy
Wilderness Reclamation
13%inclusion3 decks24 decks
4%synergy
Kenrith's Transformation
13%inclusion3 decks24 decks
8%synergy
Dismiss into Dream
13%inclusion3 decks24 decks
12%synergy
Utopia Sprawl
8.3%inclusion2 decks24 decks
2%synergy
Exploration
8.3%inclusion2 decks24 decks
-5%synergy
Beastmaster Ascension
8.3%inclusion2 decks24 decks
5%synergy
Garruk's Uprising
8.3%inclusion2 decks24 decks
-8%synergy
Imprisoned in the Moon
8.3%inclusion2 decks24 decks
4%synergy
Mana Reflection
8.3%inclusion2 decks24 decks
4%synergy
Khalni Heart Expedition
8.3%inclusion2 decks24 decks
4%synergy
Paradox Haze
8.3%inclusion2 decks24 decks
8%synergy
Defense of the Heart
8.3%inclusion2 decks24 decks
6%synergy
Planeswalkers
Oko, Thief of Crowns
25%inclusion6 decks24 decks
18%synergy
Kiora, Master of the Depths
8.3%inclusion2 decks24 decks
6%synergy
Kiora, the Crashing Wave
8.3%inclusion2 decks24 decks
6%synergy
Utility Lands
Reliquary Tower
50%inclusion12 decks24 decks
0%synergy
Mystic Sanctuary
38%inclusion9 decks24 decks
25%synergy
Temple of the False God
38%inclusion9 decks24 decks
22%synergy
Mosswort Bridge
25%inclusion6 decks24 decks
8%synergy
Command Beacon
25%inclusion6 decks24 decks
21%synergy
Yavimaya, Cradle of Growth
25%inclusion6 decks24 decks
3%synergy
Boseiju, Who Endures
25%inclusion6 decks24 decks
3%synergy
Otawara, Soaring City
25%inclusion6 decks24 decks
6%synergy
Alchemist's Refuge
21%inclusion5 decks24 decks
3%synergy
Evendo, Waking Haven
13%inclusion2 decks15 decks
8%synergy
Thespian's Stage
13%inclusion3 decks24 decks
5%synergy
Dark Depths
13%inclusion3 decks24 decks
6%synergy
Castle Vantress
13%inclusion3 decks24 decks
6%synergy
Three Tree City
13%inclusion3 decks24 decks
7%synergy
Castle Garenbrig
13%inclusion3 decks24 decks
8%synergy
Mistrise Village
10%inclusion2 decks21 decks
-1%synergy
Rivendell
8.3%inclusion2 decks24 decks
3%synergy
War Room
8.3%inclusion2 decks24 decks
7%synergy
Lumbering Falls
8.3%inclusion2 decks24 decks
2%synergy
Oran-Rief, the Vastwood
8.3%inclusion2 decks24 decks
4%synergy
Rogue's Passage
8.3%inclusion2 decks24 decks
-14%synergy
Bonders' Enclave
8.3%inclusion2 decks24 decks
7%synergy
Mana Artifacts
Sol Ring
92%inclusion22 decks24 decks
11%synergy
Arcane Signet
67%inclusion16 decks24 decks
4%synergy
Talisman of Curiosity
29%inclusion7 decks24 decks
8%synergy
Simic Signet
21%inclusion5 decks24 decks
-11%synergy
Thought Vessel
21%inclusion5 decks24 decks
1%synergy
Thran Dynamo
17%inclusion4 decks24 decks
14%synergy
Fellwar Stone
13%inclusion3 decks24 decks
3%synergy
Replicating Ring
8.3%inclusion2 decks24 decks
6%synergy
Lands
Command Tower
96%inclusion23 decks24 decks
11%synergy
Island
92%inclusion22 decks24 decks
-4%synergy
Forest
92%inclusion22 decks24 decks
-4%synergy
Hinterland Harbor
83%inclusion20 decks24 decks
24%synergy
Yavimaya Coast
79%inclusion19 decks24 decks
27%synergy
Dreamroot Cascade
58%inclusion14 decks24 decks
16%synergy
Breeding Pool
54%inclusion13 decks24 decks
9%synergy
Vineglimmer Snarl
54%inclusion13 decks24 decks
16%synergy
Rejuvenating Springs
54%inclusion13 decks24 decks
10%synergy
Temple of Mystery
50%inclusion12 decks24 decks
12%synergy
Flooded Grove
50%inclusion12 decks24 decks
9%synergy
Simic Growth Chamber
38%inclusion9 decks24 decks
-11%synergy
Misty Rainforest
38%inclusion9 decks24 decks
6%synergy
Barkchannel Pathway
38%inclusion9 decks24 decks
17%synergy
Waterlogged Grove
38%inclusion9 decks24 decks
17%synergy
Hedge Maze
38%inclusion9 decks24 decks
18%synergy
Tangled Islet
29%inclusion7 decks24 decks
13%synergy
Willowrush Verge
26%inclusion6 decks23 decks
10%synergy
Myriad Landscape
25%inclusion6 decks24 decks
3%synergy
Exotic Orchard
25%inclusion6 decks24 decks
1%synergy
Sink into Stupor
25%inclusion6 decks24 decks
14%synergy
Snow-Covered Forest
21%inclusion5 decks24 decks
14%synergy
Rimewood Falls
21%inclusion5 decks24 decks
12%synergy
Evolving Wilds
21%inclusion5 decks24 decks
-4%synergy
Fabled Passage
17%inclusion4 decks24 decks
2%synergy
Disciple of Freyalise
17%inclusion4 decks24 decks
12%synergy
Littjara Mirrorlake
17%inclusion4 decks24 decks
13%synergy
Snow-Covered Island
17%inclusion4 decks24 decks
10%synergy
Tropical Island
17%inclusion4 decks24 decks
2%synergy
Bridgeworks Battle
17%inclusion4 decks24 decks
12%synergy
Path of Ancestry
17%inclusion4 decks24 decks
-1%synergy
Bala Ged Recovery
17%inclusion4 decks24 decks
7%synergy
Hydroelectric Specimen
13%inclusion3 decks24 decks
7%synergy
Blighted Woodland
8.3%inclusion2 decks24 decks
1%synergy
Prismatic Vista
8.3%inclusion2 decks24 decks
1%synergy
Windswept Heath
8.3%inclusion2 decks24 decks
-2%synergy
Sea Gate Restoration
8.3%inclusion2 decks24 decks
3%synergy
Tangled Florahedron
8.3%inclusion2 decks24 decks
7%synergy
Wooded Foothills
8.3%inclusion2 decks24 decks
-1%synergy
Verdant Catacombs
8.3%inclusion2 decks24 decks
-1%synergy
Botanical Sanctum
8.3%inclusion2 decks24 decks
-4%synergy
Demolition Field
8.3%inclusion2 decks24 decks
5%synergy
Plaza of Heroes
8.3%inclusion2 decks24 decks
7%synergy
Glasspool Mimic
8.3%inclusion2 decks24 decks
4%synergy
Thornwood Falls
8.3%inclusion2 decks24 decks
-9%synergy
Polluted Delta
8.3%inclusion2 decks24 decks
-2%synergy
Flooded Strand
8.3%inclusion2 decks24 decks
-3%synergy
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