Koma, Cosmos Serpent (Commander) - Budget Upgraded

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #306
38decks
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
12%inclusion2 decks17 decks
6%synergy
The Legend of Kyoshi
6.3%inclusion1 decks16 decks
5%synergy
Meditation Pools
6.3%inclusion1 decks16 decks
5%synergy
Shared Roots
5.9%inclusion1 decks17 decks
2%synergy
Secret of Bloodbending
5.9%inclusion1 decks17 decks
6%synergy
High Synergy Cards
Whelming Wave
79%inclusion30 decks38 decks
68%synergy
Koma, World-Eater
65%inclusion24 decks37 decks
52%synergy
Elemental Bond
50%inclusion19 decks38 decks
44%synergy
Junk Winder
50%inclusion19 decks38 decks
43%synergy
Arixmethes, Slumbering Isle
53%inclusion20 decks38 decks
39%synergy
Adrix and Nev, Twincasters
47%inclusion18 decks38 decks
39%synergy
Garruk's Packleader
39%inclusion15 decks38 decks
37%synergy
Esix, Fractal Bloom
39%inclusion15 decks38 decks
36%synergy
Rampant Growth
74%inclusion28 decks38 decks
33%synergy
Slinn Voda, the Rising Deep
39%inclusion15 decks38 decks
33%synergy
Top Cards
Counterspell
63%inclusion24 decks38 decks
13%synergy
Tatyova, Benthic Druid
58%inclusion22 decks38 decks
27%synergy
Beast Within
58%inclusion22 decks38 decks
8%synergy
Llanowar Elves
55%inclusion21 decks38 decks
27%synergy
Kodama's Reach
53%inclusion20 decks38 decks
17%synergy
Cultivate
53%inclusion20 decks38 decks
6%synergy
Growth Spiral
53%inclusion20 decks38 decks
8%synergy
Murkfiend Liege
47%inclusion18 decks38 decks
33%synergy
Sakura-Tribe Elder
45%inclusion17 decks38 decks
25%synergy
Rampaging Baloths
39%inclusion15 decks38 decks
23%synergy
Game Changers
Seedborn Muse
13%inclusion5 decks38 decks
-3%synergy
Creatures
Scourge of Fleets
39%inclusion15 decks38 decks
32%synergy
Aesi, Tyrant of Gyre Strait
34%inclusion13 decks38 decks
17%synergy
Archetype of Imagination
34%inclusion13 decks38 decks
30%synergy
Elvish Mystic
34%inclusion13 decks38 decks
10%synergy
Summon: Leviathan
30%inclusion9 decks30 decks
23%synergy
Starwinder
29%inclusion7 decks24 decks
23%synergy
Stormtide Leviathan
29%inclusion11 decks38 decks
23%synergy
Coiling Oracle
29%inclusion11 decks38 decks
16%synergy
Eternal Witness
26%inclusion10 decks38 decks
5%synergy
Reclamation Sage
24%inclusion9 decks38 decks
10%synergy
Fyndhorn Elves
24%inclusion9 decks38 decks
8%synergy
Octomancer
21%inclusion8 decks38 decks
16%synergy
Xolatoyac, the Smiling Flood
21%inclusion8 decks38 decks
14%synergy
Ohran Frostfang
21%inclusion8 decks38 decks
17%synergy
Avenger of Zendikar
21%inclusion8 decks38 decks
3%synergy
Nadir Kraken
21%inclusion8 decks38 decks
17%synergy
Hullbreaker Horror
21%inclusion8 decks38 decks
3%synergy
Hydroid Krasis
18%inclusion7 decks38 decks
10%synergy
Scute Swarm
18%inclusion7 decks38 decks
-2%synergy
Simic Sky Swallower
18%inclusion7 decks38 decks
14%synergy
Kiora, the Rising Tide
16%inclusion6 decks37 decks
13%synergy
Rashmi, Eternities Crafter
16%inclusion6 decks38 decks
13%synergy
Mystic Snake
16%inclusion6 decks38 decks
12%synergy
Fierce Empath
16%inclusion6 decks38 decks
13%synergy
Spark Double
16%inclusion6 decks38 decks
6%synergy
Trygon Predator
16%inclusion6 decks38 decks
9%synergy
Inkwell Leviathan
16%inclusion6 decks38 decks
11%synergy
Tromokratis
16%inclusion6 decks38 decks
11%synergy
Serpent of Yawning Depths
16%inclusion6 decks38 decks
9%synergy
Grappling Kraken
14%inclusion5 decks37 decks
10%synergy
Arbor Elf
13%inclusion5 decks38 decks
7%synergy
Beast Whisperer
13%inclusion5 decks38 decks
4%synergy
Stormsurge Kraken
13%inclusion5 decks38 decks
9%synergy
Dryad of the Ilysian Grove
13%inclusion5 decks38 decks
3%synergy
Saryth, the Viper's Fang
13%inclusion5 decks38 decks
11%synergy
Gala Greeters
13%inclusion5 decks38 decks
12%synergy
Topiary Stomper
13%inclusion5 decks38 decks
11%synergy
Spawning Kraken
13%inclusion5 decks38 decks
6%synergy
Loot, Exuberant Explorer
11%inclusion4 decks37 decks
3%synergy
Solemn Simulacrum
11%inclusion4 decks38 decks
4%synergy
Troyan, Gutsy Explorer
11%inclusion4 decks38 decks
7%synergy
Thryx, the Sudden Storm
11%inclusion4 decks38 decks
8%synergy
Inga and Esika
11%inclusion4 decks38 decks
8%synergy
Terastodon
11%inclusion4 decks38 decks
3%synergy
Farhaven Elf
11%inclusion4 decks38 decks
6%synergy
End-Raze Forerunners
11%inclusion4 decks38 decks
6%synergy
Yavimaya Elder
11%inclusion4 decks38 decks
8%synergy
Toski, Bearer of Secrets
11%inclusion4 decks38 decks
7%synergy
Tireless Provisioner
11%inclusion4 decks38 decks
-5%synergy
Champion of Lambholt
11%inclusion4 decks38 decks
5%synergy
Instants
Negate
39%inclusion15 decks38 decks
14%synergy
Aetherize
39%inclusion15 decks38 decks
28%synergy
Reality Shift
37%inclusion14 decks38 decks
22%synergy
Return of the Wildspeaker
34%inclusion13 decks38 decks
24%synergy
An Offer You Can't Refuse
32%inclusion12 decks38 decks
8%synergy
Harrow
29%inclusion11 decks38 decks
17%synergy
Arcane Denial
21%inclusion8 decks38 decks
-2%synergy
Planar Genesis
21%inclusion8 decks38 decks
10%synergy
Double Major
21%inclusion8 decks38 decks
13%synergy
Rapid Hybridization
18%inclusion7 decks38 decks
-8%synergy
Decisive Denial
18%inclusion7 decks38 decks
13%synergy
Brainstorm
18%inclusion7 decks38 decks
4%synergy
Simic Charm
18%inclusion7 decks38 decks
11%synergy
Refute
16%inclusion6 decks37 decks
14%synergy
Eureka Moment
16%inclusion6 decks38 decks
5%synergy
Fog
16%inclusion6 decks38 decks
12%synergy
Plasm Capture
16%inclusion6 decks38 decks
12%synergy
Return to Nature
16%inclusion6 decks38 decks
10%synergy
Prishe's Wanderings
14%inclusion4 decks29 decks
13%synergy
Pongify
13%inclusion5 decks38 decks
-12%synergy
Snakeskin Veil
13%inclusion5 decks38 decks
7%synergy
Second Harvest
13%inclusion5 decks38 decks
7%synergy
Nature's Claim
13%inclusion5 decks38 decks
3%synergy
Resculpt
13%inclusion5 decks38 decks
7%synergy
Perplexing Test
13%inclusion5 decks38 decks
9%synergy
Auroral Procession
12%inclusion4 decks34 decks
8%synergy
Heroic Intervention
11%inclusion4 decks38 decks
-20%synergy
Krosan Grip
11%inclusion4 decks38 decks
3%synergy
Sublime Epiphany
11%inclusion4 decks38 decks
8%synergy
Entish Restoration
11%inclusion4 decks38 decks
1%synergy
Voidslime
11%inclusion4 decks38 decks
5%synergy
Essence Scatter
11%inclusion4 decks38 decks
9%synergy
Mystic Reflection
11%inclusion4 decks38 decks
8%synergy
Spell Pierce
11%inclusion4 decks38 decks
7%synergy
Roiling Regrowth
11%inclusion4 decks38 decks
6%synergy
Disdainful Stroke
7.9%inclusion3 decks38 decks
6%synergy
Jaheira's Respite
7.9%inclusion3 decks38 decks
6%synergy
Frantic Search
7.9%inclusion3 decks38 decks
2%synergy
Mystical Dispute
7.9%inclusion3 decks38 decks
8%synergy
Barrier Breach
7.9%inclusion3 decks38 decks
8%synergy
Biomass Mutation
7.9%inclusion3 decks38 decks
5%synergy
Cackling Counterpart
7.9%inclusion3 decks38 decks
5%synergy
Joint Exploration
7.9%inclusion3 decks38 decks
2%synergy
Rewind
7.9%inclusion3 decks38 decks
5%synergy
Collective Resistance
7.9%inclusion3 decks38 decks
4%synergy
Into the Roil
7.9%inclusion3 decks38 decks
6%synergy
Mystic Confluence
7.9%inclusion3 decks38 decks
5%synergy
High Tide
7.9%inclusion3 decks38 decks
6%synergy
Memory Deluge
7.9%inclusion3 decks38 decks
7%synergy
Think Twice
7.9%inclusion3 decks38 decks
7%synergy
Sorceries
Explore
37%inclusion14 decks38 decks
17%synergy
Urban Evolution
37%inclusion14 decks38 decks
27%synergy
Farseek
34%inclusion13 decks38 decks
9%synergy
Nature's Lore
29%inclusion11 decks38 decks
-2%synergy
Curse of the Swine
26%inclusion10 decks38 decks
16%synergy
Harmonize
21%inclusion8 decks38 decks
16%synergy
Overwhelming Stampede
21%inclusion8 decks38 decks
9%synergy
Migration Path
21%inclusion8 decks38 decks
18%synergy
Grow from the Ashes
18%inclusion7 decks38 decks
17%synergy
Skyshroud Claim
16%inclusion6 decks38 decks
7%synergy
Explosive Vegetation
16%inclusion6 decks38 decks
10%synergy
Search for Tomorrow
13%inclusion5 decks38 decks
9%synergy
River's Rebuke
13%inclusion5 decks38 decks
11%synergy
Circuitous Route
11%inclusion4 decks38 decks
8%synergy
Oversimplify
11%inclusion4 decks38 decks
7%synergy
Rishkar's Expertise
11%inclusion4 decks38 decks
2%synergy
Irenicus's Vile Duplication
11%inclusion4 decks38 decks
4%synergy
Shamanic Revelation
11%inclusion4 decks38 decks
5%synergy
Rite of Replication
11%inclusion4 decks38 decks
3%synergy
Spitting Image
11%inclusion4 decks38 decks
8%synergy
Ezuri's Predation
11%inclusion4 decks38 decks
3%synergy
Relm's Sketching
10%inclusion3 decks30 decks
9%synergy
Pull Through the Weft
8.3%inclusion2 decks24 decks
8%synergy
Three Visits
7.9%inclusion3 decks38 decks
-15%synergy
Flood of Tears
7.9%inclusion3 decks38 decks
6%synergy
Overrun
7.9%inclusion3 decks38 decks
6%synergy
Distant Melody
7.9%inclusion3 decks38 decks
5%synergy
Regrowth
7.9%inclusion3 decks38 decks
4%synergy
Bushwhack
7.9%inclusion3 decks38 decks
6%synergy
Nature's Rhythm
5.9%inclusion2 decks34 decks
0%synergy
Seismic Sense
5.9%inclusion1 decks17 decks
5%synergy
Preposterous Proportions
5.4%inclusion2 decks37 decks
4%synergy
Flare of Cultivation
5.3%inclusion2 decks38 decks
3%synergy
Divination
5.3%inclusion2 decks38 decks
5%synergy
Ranger's Path
5.3%inclusion2 decks38 decks
5%synergy
Wear Down
5.3%inclusion2 decks38 decks
4%synergy
Peregrination
5.3%inclusion2 decks38 decks
5%synergy
Sakashima's Will
5.3%inclusion2 decks38 decks
5%synergy
Tooth and Nail
5.3%inclusion2 decks38 decks
4%synergy
Triumph of the Hordes
5.3%inclusion2 decks38 decks
2%synergy
Hour of Promise
5.3%inclusion2 decks38 decks
2%synergy
Wash Out
5.3%inclusion2 decks38 decks
4%synergy
Deep Analysis
5.3%inclusion2 decks38 decks
4%synergy
Full Steam Ahead
5.3%inclusion2 decks38 decks
5%synergy
Consuming Tide
5.3%inclusion2 decks38 decks
3%synergy
Broken Bond
5.3%inclusion2 decks38 decks
0%synergy
Primal Command
5.3%inclusion2 decks38 decks
4%synergy
Preordain
5.3%inclusion2 decks38 decks
-3%synergy
Doppelgang
5.3%inclusion2 decks38 decks
-1%synergy
Treasure Cruise
5.3%inclusion2 decks38 decks
2%synergy
Utility Artifacts
Combine Chrysalis
29%inclusion11 decks38 decks
25%synergy
Swiftfoot Boots
26%inclusion10 decks38 decks
1%synergy
Lightning Greaves
13%inclusion5 decks38 decks
-9%synergy
Mirror Box
11%inclusion4 decks38 decks
7%synergy
Idol of Oblivion
11%inclusion4 decks38 decks
7%synergy
The Earth Crystal
10%inclusion3 decks29 decks
6%synergy
Bident of Thassa
7.9%inclusion3 decks38 decks
1%synergy
Banner of Kinship
5.4%inclusion2 decks37 decks
4%synergy
Kefnet's Monument
5.3%inclusion2 decks38 decks
4%synergy
Emerald Medallion
5.3%inclusion2 decks38 decks
2%synergy
Expedition Map
5.3%inclusion2 decks38 decks
1%synergy
Enchantments
Garruk's Uprising
29%inclusion11 decks38 decks
12%synergy
Wilderness Reclamation
24%inclusion9 decks38 decks
15%synergy
Wild Growth
18%inclusion7 decks38 decks
10%synergy
Imprisoned in the Moon
16%inclusion6 decks38 decks
12%synergy
Extravagant Replication
16%inclusion6 decks38 decks
13%synergy
Propaganda
16%inclusion6 decks38 decks
9%synergy
Kindred Discovery
13%inclusion5 decks38 decks
3%synergy
Beastmaster Ascension
13%inclusion5 decks38 decks
10%synergy
Primal Vigor
13%inclusion5 decks38 decks
10%synergy
Moonlit Meditation
13%inclusion3 decks24 decks
11%synergy
Growing Rites of Itlimoc
11%inclusion4 decks38 decks
5%synergy
Eusocial Engineering
8.3%inclusion2 decks24 decks
7%synergy
Doubling Season
7.9%inclusion3 decks38 decks
-2%synergy
Cryptolith Rite
7.9%inclusion3 decks38 decks
5%synergy
Verity Circle
7.9%inclusion3 decks38 decks
7%synergy
Lignify
7.9%inclusion3 decks38 decks
6%synergy
Kenrith's Transformation
7.9%inclusion3 decks38 decks
4%synergy
Khalni Heart Expedition
7.9%inclusion3 decks38 decks
4%synergy
Tribute to the World Tree
7.9%inclusion3 decks38 decks
2%synergy
Primeval Bounty
7.9%inclusion3 decks38 decks
6%synergy
Mystic Remora
7.9%inclusion3 decks38 decks
-7%synergy
Mana Reflection
7.9%inclusion3 decks38 decks
3%synergy
Witness Protection
7.9%inclusion3 decks38 decks
5%synergy
March of the World Ooze
5.4%inclusion2 decks37 decks
5%synergy
Utopia Sprawl
5.3%inclusion2 decks38 decks
-1%synergy
Retreat to Kazandu
5.3%inclusion2 decks38 decks
1%synergy
Simic Ascendancy
5.3%inclusion2 decks38 decks
-8%synergy
New Horizons
5.3%inclusion2 decks38 decks
5%synergy
Zendikar's Roil
5.3%inclusion2 decks38 decks
1%synergy
Dismiss into Dream
5.3%inclusion2 decks38 decks
5%synergy
Opposition
5.3%inclusion2 decks38 decks
5%synergy
Fertile Ground
5.3%inclusion2 decks38 decks
4%synergy
Druid Class
5.3%inclusion2 decks38 decks
0%synergy
Primal Rage
5.3%inclusion2 decks38 decks
5%synergy
Overgrowth
5.3%inclusion2 decks38 decks
4%synergy
Planeswalkers
Kiora, Behemoth Beckoner
11%inclusion4 decks38 decks
4%synergy
Kiora, the Crashing Wave
7.9%inclusion3 decks38 decks
5%synergy
Oko, Thief of Crowns
7.9%inclusion3 decks38 decks
1%synergy
Nissa, Steward of Elements
7.9%inclusion3 decks38 decks
4%synergy
Kiora, Master of the Depths
5.3%inclusion2 decks38 decks
3%synergy
Wrenn and Seven
5.3%inclusion2 decks38 decks
3%synergy
Utility Lands
Reliquary Tower
45%inclusion17 decks38 decks
-5%synergy
Rogue's Passage
24%inclusion9 decks38 decks
2%synergy
Alchemist's Refuge
21%inclusion8 decks38 decks
4%synergy
Temple of the False God
18%inclusion7 decks38 decks
3%synergy
Lumbering Falls
16%inclusion6 decks38 decks
9%synergy
Mosswort Bridge
16%inclusion6 decks38 decks
-1%synergy
Restless Vinestalk
7.9%inclusion3 decks38 decks
2%synergy
Mystic Sanctuary
5.3%inclusion2 decks38 decks
-7%synergy
Scavenger Grounds
5.3%inclusion2 decks38 decks
1%synergy
Command Beacon
5.3%inclusion2 decks38 decks
1%synergy
Thespian's Stage
5.3%inclusion2 decks38 decks
-2%synergy
Coral Atoll
5.3%inclusion2 decks38 decks
3%synergy
Castle Vantress
5.3%inclusion2 decks38 decks
-2%synergy
Bonders' Enclave
5.3%inclusion2 decks38 decks
4%synergy
Jungle Basin
5.3%inclusion2 decks38 decks
3%synergy
Memorial to Genius
5.3%inclusion2 decks38 decks
4%synergy
Mana Artifacts
Sol Ring
82%inclusion31 decks38 decks
1%synergy
Arcane Signet
66%inclusion25 decks38 decks
3%synergy
Commander's Sphere
29%inclusion11 decks38 decks
21%synergy
Simic Signet
29%inclusion11 decks38 decks
-3%synergy
Thought Vessel
24%inclusion9 decks38 decks
3%synergy
Talisman of Curiosity
21%inclusion8 decks38 decks
-1%synergy
Mind Stone
13%inclusion5 decks38 decks
9%synergy
Herd Heirloom
5.9%inclusion2 decks34 decks
3%synergy
Moss Diamond
5.3%inclusion2 decks38 decks
4%synergy
Sky Diamond
5.3%inclusion2 decks38 decks
4%synergy
Bender's Waterskin
5.0%inclusion1 decks20 decks
4%synergy
Lands
Island
100%inclusion38 decks38 decks
5%synergy
Forest
100%inclusion38 decks38 decks
5%synergy
Command Tower
68%inclusion26 decks38 decks
-17%synergy
Simic Growth Chamber
61%inclusion23 decks38 decks
12%synergy
Vineglimmer Snarl
53%inclusion20 decks38 decks
14%synergy
Temple of Mystery
53%inclusion20 decks38 decks
15%synergy
Evolving Wilds
53%inclusion20 decks38 decks
28%synergy
Hinterland Harbor
47%inclusion18 decks38 decks
-12%synergy
Yavimaya Coast
42%inclusion16 decks38 decks
-10%synergy
Flooded Grove
42%inclusion16 decks38 decks
1%synergy
Thornwood Falls
42%inclusion16 decks38 decks
25%synergy
Terramorphic Expanse
37%inclusion14 decks38 decks
17%synergy
Tangled Islet
29%inclusion11 decks38 decks
13%synergy
Simic Guildgate
29%inclusion11 decks38 decks
19%synergy
Woodland Stream
24%inclusion9 decks38 decks
19%synergy
Dreamroot Cascade
21%inclusion8 decks38 decks
-21%synergy
Myriad Landscape
18%inclusion7 decks38 decks
-3%synergy
Exotic Orchard
18%inclusion7 decks38 decks
-5%synergy
Overflowing Basin
18%inclusion7 decks38 decks
-1%synergy
Blighted Woodland
16%inclusion6 decks38 decks
8%synergy
Littjara Mirrorlake
16%inclusion6 decks38 decks
12%synergy
Quandrix Campus
13%inclusion5 decks38 decks
6%synergy
Rimewood Falls
13%inclusion5 decks38 decks
4%synergy
Path of Ancestry
13%inclusion5 decks38 decks
-4%synergy
Lush Oasis
13%inclusion5 decks38 decks
7%synergy
Barkchannel Pathway
11%inclusion4 decks38 decks
-10%synergy
Tanglepool Bridge
7.9%inclusion3 decks38 decks
3%synergy
Botanical Sanctum
7.9%inclusion3 decks38 decks
-5%synergy
Rejuvenating Springs
7.9%inclusion3 decks38 decks
-36%synergy
Thriving Isle
7.9%inclusion3 decks38 decks
6%synergy
Waterlogged Grove
7.9%inclusion3 decks38 decks
-13%synergy
Brokers Hideout
7.9%inclusion3 decks38 decks
3%synergy
Guadosalam, Farplane Gateway
6.9%inclusion2 decks29 decks
5%synergy
Disciple of Freyalise
5.3%inclusion2 decks38 decks
0%synergy
Vivid Creek
5.3%inclusion2 decks38 decks
4%synergy
Tangled Florahedron
5.3%inclusion2 decks38 decks
4%synergy
Ash Barrens
5.3%inclusion2 decks38 decks
1%synergy
Breeding Pool
5.3%inclusion2 decks38 decks
-41%synergy
Demolition Field
5.3%inclusion2 decks38 decks
2%synergy
Lakeside Shack
5.3%inclusion2 decks38 decks
4%synergy
Bridgeworks Battle
5.3%inclusion2 decks38 decks
1%synergy
Vibrant Cityscape
5.0%inclusion1 decks20 decks
3%synergy
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