Koma, Cosmos Serpent (Commander) - Budget Core

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #296
60decks
As CommanderAs CardAverage DeckDecks
Bracket
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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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Whelming Wave
55%inclusion33 decks60 decks
44%synergy
Garruk's Packleader
43%inclusion26 decks60 decks
41%synergy
Explore
58%inclusion35 decks60 decks
38%synergy
Junk Winder
42%inclusion25 decks60 decks
35%synergy
Urban Evolution
43%inclusion26 decks60 decks
34%synergy
Slinn Voda, the Rising Deep
40%inclusion24 decks60 decks
33%synergy
Coiling Oracle
43%inclusion26 decks60 decks
30%synergy
Negate
55%inclusion33 decks60 decks
29%synergy
Tatyova, Benthic Druid
60%inclusion36 decks60 decks
29%synergy
Arixmethes, Slumbering Isle
42%inclusion25 decks60 decks
28%synergy
Top Cards
Growth Spiral
62%inclusion37 decks60 decks
17%synergy
Rampant Growth
62%inclusion37 decks60 decks
21%synergy
Cultivate
53%inclusion32 decks60 decks
6%synergy
Llanowar Elves
43%inclusion26 decks60 decks
16%synergy
Koma, World-Eater
40%inclusion16 decks40 decks
27%synergy
Eureka Moment
38%inclusion23 decks60 decks
27%synergy
Elvish Mystic
38%inclusion23 decks60 decks
14%synergy
Kodama's Reach
35%inclusion21 decks60 decks
-1%synergy
Counterspell
35%inclusion21 decks60 decks
-15%synergy
Scourge of Fleets
33%inclusion20 decks60 decks
25%synergy
Creatures
Reclamation Sage
32%inclusion19 decks60 decks
17%synergy
Murkfiend Liege
32%inclusion19 decks60 decks
17%synergy
Sakura-Tribe Elder
30%inclusion18 decks60 decks
11%synergy
Troyan, Gutsy Explorer
28%inclusion17 decks60 decks
25%synergy
Rampaging Baloths
28%inclusion17 decks60 decks
11%synergy
Adrix and Nev, Twincasters
27%inclusion16 decks60 decks
18%synergy
Stormtide Leviathan
27%inclusion16 decks60 decks
21%synergy
Tromokratis
27%inclusion16 decks60 decks
21%synergy
Nadir Kraken
25%inclusion15 decks60 decks
21%synergy
Esix, Fractal Bloom
23%inclusion14 decks60 decks
19%synergy
Trygon Predator
23%inclusion14 decks60 decks
17%synergy
Octomancer
20%inclusion10 decks49 decks
16%synergy
Xolatoyac, the Smiling Flood
18%inclusion11 decks60 decks
11%synergy
Reef Worm
18%inclusion11 decks60 decks
15%synergy
Zimone, Quandrix Prodigy
18%inclusion11 decks60 decks
15%synergy
Hydroid Krasis
17%inclusion10 decks60 decks
8%synergy
Simic Sky Swallower
17%inclusion10 decks60 decks
12%synergy
Archetype of Imagination
15%inclusion9 decks60 decks
11%synergy
Fyndhorn Elves
15%inclusion9 decks60 decks
-1%synergy
Poison Dart Frog
15%inclusion9 decks60 decks
8%synergy
Inga and Esika
13%inclusion8 decks60 decks
11%synergy
Kiora's Follower
13%inclusion8 decks60 decks
-2%synergy
Mulldrifter
13%inclusion8 decks60 decks
7%synergy
Hullbreaker Horror
13%inclusion8 decks60 decks
-4%synergy
Farhaven Elf
12%inclusion7 decks60 decks
7%synergy
Brinelin, the Moon Kraken
12%inclusion7 decks60 decks
7%synergy
Monstrosity of the Lake
12%inclusion7 decks60 decks
9%synergy
Starwinder
11%inclusion1 decks9 decks
4%synergy
Glacier Godmaw
11%inclusion1 decks9 decks
7%synergy
Gyre Engineer
10%inclusion6 decks60 decks
7%synergy
Eternal Witness
10%inclusion6 decks60 decks
-11%synergy
Kiora, Sovereign of the Deep
10%inclusion6 decks60 decks
8%synergy
Verazol, the Split Current
10%inclusion6 decks60 decks
10%synergy
Lorthos, the Tidemaker
10%inclusion6 decks60 decks
7%synergy
End-Raze Forerunners
10%inclusion6 decks60 decks
5%synergy
Moritte of the Frost
10%inclusion6 decks60 decks
9%synergy
Gretchen Titchwillow
10%inclusion6 decks60 decks
8%synergy
Inkwell Leviathan
10%inclusion6 decks60 decks
6%synergy
Shipbreaker Kraken
10%inclusion6 decks60 decks
7%synergy
Maraleaf Pixie
8.3%inclusion5 decks60 decks
2%synergy
Cryptic Serpent
8.3%inclusion5 decks60 decks
8%synergy
Acidic Slime
8.3%inclusion5 decks60 decks
2%synergy
Avenger of Zendikar
8.3%inclusion5 decks60 decks
-10%synergy
Needlethorn Drake
8.3%inclusion5 decks60 decks
8%synergy
Quandrix Cultivator
8.3%inclusion5 decks60 decks
7%synergy
Biolume Egg
8.3%inclusion5 decks60 decks
8%synergy
Yavimaya Elder
8.3%inclusion5 decks60 decks
6%synergy
Prime Speaker Zegana
8.3%inclusion5 decks60 decks
-2%synergy
Charix, the Raging Isle
8.3%inclusion5 decks60 decks
5%synergy
Arbor Elf
8.3%inclusion5 decks60 decks
2%synergy
Instants
Return to Nature
32%inclusion19 decks60 decks
26%synergy
Planar Genesis
30%inclusion15 decks50 decks
19%synergy
Snakeskin Veil
28%inclusion17 decks60 decks
23%synergy
Return of the Wildspeaker
27%inclusion16 decks60 decks
16%synergy
Aetherize
25%inclusion15 decks60 decks
13%synergy
Decisive Denial
23%inclusion14 decks60 decks
18%synergy
Simic Charm
23%inclusion14 decks60 decks
15%synergy
Harrow
22%inclusion13 decks60 decks
10%synergy
Beast Within
20%inclusion12 decks60 decks
-30%synergy
Cancel
18%inclusion11 decks60 decks
16%synergy
Perplexing Test
18%inclusion11 decks60 decks
14%synergy
Double Major
18%inclusion11 decks60 decks
10%synergy
Reality Shift
18%inclusion11 decks60 decks
4%synergy
Joint Exploration
18%inclusion11 decks60 decks
12%synergy
Disdainful Stroke
17%inclusion10 decks60 decks
15%synergy
Fact or Fiction
17%inclusion10 decks60 decks
14%synergy
Plasm Capture
15%inclusion9 decks60 decks
11%synergy
Opt
15%inclusion9 decks60 decks
8%synergy
Brainstorm
12%inclusion7 decks60 decks
-3%synergy
Voidslime
12%inclusion7 decks60 decks
7%synergy
Mystic Confluence
12%inclusion7 decks60 decks
9%synergy
You See a Guard Approach
10%inclusion6 decks60 decks
10%synergy
Resculpt
10%inclusion6 decks60 decks
4%synergy
Rewind
10%inclusion6 decks60 decks
7%synergy
Naturalize
10%inclusion6 decks60 decks
8%synergy
Essence Scatter
10%inclusion6 decks60 decks
9%synergy
Impulse
10%inclusion6 decks60 decks
9%synergy
Broken Wings
8.3%inclusion5 decks60 decks
7%synergy
Repulsive Mutation
8.3%inclusion5 decks60 decks
3%synergy
Ranger's Guile
8.3%inclusion5 decks60 decks
8%synergy
Filter Out
8.3%inclusion5 decks60 decks
6%synergy
Into the Roil
8.3%inclusion5 decks60 decks
7%synergy
Pull from Tomorrow
8.3%inclusion5 decks60 decks
6%synergy
Tamiyo's Safekeeping
8.3%inclusion5 decks60 decks
3%synergy
Unwind
8.3%inclusion5 decks60 decks
6%synergy
Magic Damper
7.1%inclusion1 decks14 decks
6%synergy
Dissolve
6.7%inclusion4 decks60 decks
5%synergy
Krosan Grip
6.7%inclusion4 decks60 decks
-1%synergy
Frantic Search
6.7%inclusion4 decks60 decks
1%synergy
Second Harvest
6.7%inclusion4 decks60 decks
0%synergy
Roiling Regrowth
6.7%inclusion4 decks60 decks
2%synergy
Unsummon
6.7%inclusion4 decks60 decks
5%synergy
Saw It Coming
6.7%inclusion4 decks60 decks
5%synergy
Incubation // Incongruity
6.7%inclusion4 decks60 decks
4%synergy
Mana Leak
6.7%inclusion4 decks60 decks
4%synergy
Ice Out
6.7%inclusion4 decks60 decks
6%synergy
Unsubstantiate
6.7%inclusion4 decks60 decks
6%synergy
Thassa's Intervention
6.7%inclusion4 decks60 decks
6%synergy
Auroral Procession
5.3%inclusion1 decks19 decks
2%synergy
Essence Capture
5.0%inclusion3 decks60 decks
4%synergy
Sorceries
Curse of the Swine
27%inclusion16 decks60 decks
16%synergy
Harmonize
25%inclusion15 decks60 decks
19%synergy
Search for Tomorrow
25%inclusion15 decks60 decks
20%synergy
Explosive Vegetation
23%inclusion14 decks60 decks
18%synergy
Farseek
22%inclusion13 decks60 decks
-3%synergy
Migration Path
20%inclusion12 decks60 decks
17%synergy
Shamanic Revelation
18%inclusion11 decks60 decks
13%synergy
Broken Bond
13%inclusion8 decks60 decks
8%synergy
Vastwood Surge
13%inclusion8 decks60 decks
12%synergy
Overrun
12%inclusion7 decks60 decks
9%synergy
Distant Melody
12%inclusion7 decks60 decks
8%synergy
Ravenform
12%inclusion7 decks60 decks
7%synergy
Doppelgang
10%inclusion6 decks60 decks
3%synergy
Regrowth
10%inclusion6 decks60 decks
6%synergy
Nissa's Pilgrimage
10%inclusion6 decks60 decks
8%synergy
Unexpected Results
8.3%inclusion5 decks60 decks
7%synergy
Circuitous Route
8.3%inclusion5 decks60 decks
6%synergy
Treasure Cruise
8.3%inclusion5 decks60 decks
5%synergy
Divination
8.3%inclusion5 decks60 decks
8%synergy
Nature's Lore
8.3%inclusion5 decks60 decks
-22%synergy
Overwhelming Stampede
8.3%inclusion5 decks60 decks
-4%synergy
Spitting Image
8.3%inclusion5 decks60 decks
6%synergy
Aggressive Biomancy
8.0%inclusion4 decks50 decks
3%synergy
Map the Frontier
7.3%inclusion4 decks55 decks
6%synergy
Green Sun's Twilight
6.7%inclusion4 decks60 decks
6%synergy
Skyshroud Claim
6.7%inclusion4 decks60 decks
-2%synergy
Croaking Counterpart
6.7%inclusion4 decks60 decks
2%synergy
Primal Might
6.7%inclusion4 decks60 decks
6%synergy
Preordain
6.7%inclusion4 decks60 decks
-2%synergy
Aether Gale
6.7%inclusion4 decks60 decks
5%synergy
Grow from the Ashes
6.7%inclusion4 decks60 decks
5%synergy
Bridgeworks Battle
6.0%inclusion3 decks50 decks
1%synergy
Explore the Underdark
5.0%inclusion3 decks60 decks
5%synergy
Ranger's Path
5.0%inclusion3 decks60 decks
4%synergy
Three Visits
5.0%inclusion3 decks60 decks
-18%synergy
Deep Analysis
5.0%inclusion3 decks60 decks
4%synergy
Oversimplify
5.0%inclusion3 decks60 decks
1%synergy
Finale of Revelation
5.0%inclusion3 decks60 decks
0%synergy
Rishkar's Expertise
5.0%inclusion3 decks60 decks
-3%synergy
Bushwhack
5.0%inclusion3 decks60 decks
3%synergy
Ezuri's Predation
5.0%inclusion3 decks60 decks
-3%synergy
Rite of Replication
5.0%inclusion3 decks60 decks
-2%synergy
Quasiduplicate
5.0%inclusion3 decks60 decks
2%synergy
Irenicus's Vile Duplication
5.0%inclusion3 decks60 decks
-1%synergy
Compulsive Research
5.0%inclusion3 decks60 decks
4%synergy
Utility Artifacts
Combine Chrysalis
30%inclusion18 decks60 decks
26%synergy
Swiftfoot Boots
22%inclusion13 decks60 decks
-4%synergy
Idol of Oblivion
20%inclusion12 decks60 decks
17%synergy
Wayfarer's Bauble
17%inclusion10 decks60 decks
15%synergy
Doc Ock's Tentacles
14%inclusion1 decks7 decks
14%synergy
Kefnet's Monument
12%inclusion7 decks60 decks
11%synergy
Bident of Thassa
12%inclusion7 decks60 decks
4%synergy
Symmetry Matrix
6.7%inclusion4 decks60 decks
7%synergy
Giant's Amulet
5.0%inclusion3 decks60 decks
5%synergy
Mirror Box
5.0%inclusion3 decks60 decks
2%synergy
Traveler's Amulet
5.0%inclusion3 decks60 decks
5%synergy
Helm of the Host
5.0%inclusion3 decks60 decks
0%synergy
Blackblade Reforged
5.0%inclusion3 decks60 decks
2%synergy
Enchantments
Wild Growth
25%inclusion15 decks60 decks
16%synergy
Garruk's Uprising
25%inclusion15 decks60 decks
9%synergy
Khalni Heart Expedition
23%inclusion14 decks60 decks
19%synergy
Elemental Bond
20%inclusion12 decks60 decks
14%synergy
Primal Empathy
15%inclusion9 decks60 decks
12%synergy
Ominous Seas
13%inclusion8 decks60 decks
9%synergy
Bounty of the Luxa
13%inclusion8 decks60 decks
12%synergy
Utopia Sprawl
12%inclusion7 decks60 decks
5%synergy
Wilderness Reclamation
12%inclusion7 decks60 decks
3%synergy
Sandwurm Convergence
12%inclusion7 decks60 decks
9%synergy
Reconnaissance Mission
10%inclusion6 decks60 decks
8%synergy
Verity Circle
10%inclusion6 decks60 decks
9%synergy
Imprisoned in the Moon
10%inclusion6 decks60 decks
6%synergy
Kenrith's Transformation
10%inclusion6 decks60 decks
5%synergy
Fertile Ground
10%inclusion6 decks60 decks
8%synergy
Future Sight
6.7%inclusion4 decks60 decks
6%synergy
Eaten by Piranhas
6.7%inclusion4 decks60 decks
5%synergy
Overgrowth
6.7%inclusion4 decks60 decks
6%synergy
Glacierwood Siege
5.3%inclusion1 decks19 decks
3%synergy
Aqueous Form
5.0%inclusion3 decks60 decks
1%synergy
Lignify
5.0%inclusion3 decks60 decks
3%synergy
Spelunking
5.0%inclusion3 decks60 decks
-1%synergy
Glorious Sunrise
5.0%inclusion3 decks60 decks
4%synergy
New Horizons
5.0%inclusion3 decks60 decks
5%synergy
Snake Umbra
5.0%inclusion3 decks60 decks
3%synergy
Unnatural Growth
5.0%inclusion3 decks60 decks
2%synergy
Stasis Field
5.0%inclusion3 decks60 decks
5%synergy
Witness Protection
5.0%inclusion3 decks60 decks
2%synergy
Battles
Invasion of Zendikar
12%inclusion7 decks60 decks
10%synergy
Invasion of Segovia
6.7%inclusion4 decks60 decks
6%synergy
Planeswalkers
Kiora, Behemoth Beckoner
10%inclusion6 decks60 decks
4%synergy
Vivien, Champion of the Wilds
5.0%inclusion3 decks60 decks
4%synergy
Kiora, the Crashing Wave
5.0%inclusion3 decks60 decks
2%synergy
Utility Lands
Reliquary Tower
22%inclusion13 decks60 decks
-28%synergy
Temple of the False God
20%inclusion12 decks60 decks
4%synergy
Mosswort Bridge
17%inclusion10 decks60 decks
-1%synergy
Rogue's Passage
17%inclusion10 decks60 decks
-5%synergy
Tranquil Thicket
10%inclusion6 decks60 decks
6%synergy
Mystic Sanctuary
6.7%inclusion4 decks60 decks
-6%synergy
Lonely Sandbar
6.7%inclusion4 decks60 decks
2%synergy
Lumbering Falls
6.7%inclusion4 decks60 decks
0%synergy
Hidden Cataract
6.7%inclusion4 decks60 decks
4%synergy
Restless Vinestalk
5.0%inclusion3 decks60 decks
-1%synergy
Alchemist's Refuge
5.0%inclusion3 decks60 decks
-12%synergy
Hidden Nursery
5.0%inclusion3 decks60 decks
2%synergy
Memorial to Genius
5.0%inclusion3 decks60 decks
4%synergy
Jungle Basin
5.0%inclusion3 decks60 decks
3%synergy
Mana Artifacts
Sol Ring
60%inclusion36 decks60 decks
-21%synergy
Arcane Signet
48%inclusion29 decks60 decks
-15%synergy
Simic Signet
45%inclusion27 decks60 decks
13%synergy
Talisman of Curiosity
27%inclusion16 decks60 decks
5%synergy
Commander's Sphere
23%inclusion14 decks60 decks
15%synergy
Thought Vessel
17%inclusion10 decks60 decks
-4%synergy
Midnight Clock
15%inclusion9 decks60 decks
13%synergy
Moss Diamond
13%inclusion8 decks60 decks
12%synergy
Sky Diamond
12%inclusion7 decks60 decks
10%synergy
Fellwar Stone
10%inclusion6 decks60 decks
0%synergy
Mind Stone
10%inclusion6 decks60 decks
6%synergy
Simic Locket
8.3%inclusion5 decks60 decks
7%synergy
Simic Cluestone
6.7%inclusion4 decks60 decks
6%synergy
Decanter of Endless Water
6.7%inclusion4 decks60 decks
1%synergy
Replicating Ring
5.0%inclusion3 decks60 decks
3%synergy
Heraldic Banner
5.0%inclusion3 decks60 decks
5%synergy
Thran Dynamo
5.0%inclusion3 decks60 decks
2%synergy
Lands
Forest
98%inclusion59 decks60 decks
3%synergy
Island
98%inclusion59 decks60 decks
3%synergy
Command Tower
63%inclusion38 decks60 decks
-22%synergy
Simic Growth Chamber
52%inclusion31 decks60 decks
3%synergy
Temple of Mystery
45%inclusion27 decks60 decks
7%synergy
Thornwood Falls
42%inclusion25 decks60 decks
24%synergy
Evolving Wilds
40%inclusion24 decks60 decks
15%synergy
Vineglimmer Snarl
33%inclusion20 decks60 decks
-5%synergy
Simic Guildgate
33%inclusion20 decks60 decks
23%synergy
Hinterland Harbor
33%inclusion20 decks60 decks
-26%synergy
Myriad Landscape
28%inclusion17 decks60 decks
6%synergy
Terramorphic Expanse
27%inclusion16 decks60 decks
7%synergy
Yavimaya Coast
27%inclusion16 decks60 decks
-26%synergy
Tangled Islet
23%inclusion14 decks60 decks
7%synergy
Exotic Orchard
22%inclusion13 decks60 decks
-2%synergy
Flooded Grove
22%inclusion13 decks60 decks
-19%synergy
Rimewood Falls
17%inclusion10 decks60 decks
7%synergy
Overflowing Basin
16%inclusion9 decks58 decks
-4%synergy
Blighted Woodland
13%inclusion8 decks60 decks
6%synergy
Quandrix Campus
13%inclusion8 decks60 decks
6%synergy
Path of Ancestry
13%inclusion8 decks60 decks
-4%synergy
Lush Oasis
11%inclusion6 decks55 decks
5%synergy
Waterlogged Grove
10%inclusion6 decks60 decks
-11%synergy
Woodland Stream
8.3%inclusion5 decks60 decks
3%synergy
Tanglepool Bridge
6.7%inclusion4 decks60 decks
2%synergy
Opal Palace
6.7%inclusion4 decks60 decks
4%synergy
Bridgeworks Battle
6.0%inclusion3 decks50 decks
1%synergy
Littjara Mirrorlake
5.0%inclusion3 decks60 decks
1%synergy
Snow-Covered Forest
5.0%inclusion3 decks60 decks
-2%synergy
Tangled Florahedron
5.0%inclusion3 decks60 decks
3%synergy
Dreamroot Cascade
5.0%inclusion3 decks60 decks
-37%synergy
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