Koma, Cosmos Serpent (Commander) - Expensive 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.
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
New Cards
High Synergy Cards
Top Cards
Game Changers
Creatures
Instants
Sorceries
Utility Artifacts
Enchantments
Battles
Planeswalkers
Utility Lands
Mana Artifacts
Lands
Back to Top
Tam, Mindful First-Year
25%inclusion1 decks4 decks
25%synergy
Sodden Verdure
25%inclusion1 decks4 decks
22%synergy
The Unagi of Kyoshi Island
19%inclusion3 decks16 decks
13%synergy
Badgermole Cub
6.3%inclusion1 decks16 decks
1%synergy
Spirit Water Revival
6.3%inclusion1 decks16 decks
5%synergy
High Synergy Cards
Sakashima of a Thousand Faces
82%inclusion31 decks38 decks
77%synergy
Parallel Lives
79%inclusion30 decks38 decks
73%synergy
Adrix and Nev, Twincasters
79%inclusion30 decks38 decks
70%synergy
Spark Double
79%inclusion30 decks38 decks
69%synergy
Elemental Bond
74%inclusion28 decks38 decks
68%synergy
Sakashima the Impostor
68%inclusion26 decks38 decks
66%synergy
Whelming Wave
71%inclusion27 decks38 decks
60%synergy
Mana Drain
74%inclusion28 decks38 decks
58%synergy
Irenicus's Vile Duplication
63%inclusion24 decks38 decks
57%synergy
Serpent of Yawning Depths
63%inclusion24 decks38 decks
57%synergy
Top Cards
Nature's Lore
82%inclusion31 decks38 decks
51%synergy
Heroic Intervention
79%inclusion30 decks38 decks
49%synergy
Farseek
76%inclusion29 decks38 decks
51%synergy
Three Visits
74%inclusion28 decks38 decks
50%synergy
Beast Within
74%inclusion28 decks38 decks
24%synergy
Counterspell
68%inclusion26 decks38 decks
18%synergy
Birds of Paradise
68%inclusion26 decks38 decks
41%synergy
Doubling Season
66%inclusion25 decks38 decks
56%synergy
Cultivate
66%inclusion25 decks38 decks
19%synergy
Kodama's Reach
63%inclusion24 decks38 decks
27%synergy
Game Changers
Gaea's Cradle
61%inclusion23 decks38 decks
53%synergy
Cyclonic Rift
58%inclusion22 decks38 decks
32%synergy
Rhystic Study
39%inclusion15 decks38 decks
18%synergy
Fierce Guardianship
37%inclusion14 decks38 decks
20%synergy
Consecrated Sphinx
29%inclusion11 decks38 decks
20%synergy
Ancient Tomb
21%inclusion8 decks38 decks
12%synergy
Seedborn Muse
18%inclusion7 decks38 decks
3%synergy
Worldly Tutor
18%inclusion7 decks38 decks
3%synergy
Crop Rotation
7.9%inclusion3 decks38 decks
-5%synergy
The One Ring
7.9%inclusion3 decks38 decks
0%synergy
Creatures
Koma, World-Eater
61%inclusion23 decks38 decks
47%synergy
Craterhoof Behemoth
61%inclusion23 decks38 decks
51%synergy
Llanowar Elves
58%inclusion22 decks38 decks
30%synergy
Spawning Kraken
50%inclusion19 decks38 decks
43%synergy
Junk Winder
47%inclusion18 decks38 decks
41%synergy
Aesi, Tyrant of Gyre Strait
47%inclusion18 decks38 decks
30%synergy
Elvish Mystic
47%inclusion18 decks38 decks
23%synergy
Arixmethes, Slumbering Isle
42%inclusion16 decks38 decks
29%synergy
Ohran Frostfang
39%inclusion15 decks38 decks
36%synergy
Fanatic of Rhonas
37%inclusion14 decks38 decks
31%synergy
Roaming Throne
37%inclusion14 decks38 decks
29%synergy
Fyndhorn Elves
37%inclusion14 decks38 decks
21%synergy
Summon: Leviathan
36%inclusion10 decks28 decks
28%synergy
Chameleon, Master of Disguise
29%inclusion6 decks21 decks
26%synergy
Enduring Vitality
26%inclusion10 decks38 decks
19%synergy
Murkfiend Liege
26%inclusion10 decks38 decks
12%synergy
Archetype of Imagination
26%inclusion10 decks38 decks
22%synergy
Garruk's Packleader
24%inclusion9 decks38 decks
21%synergy
Eternal Witness
24%inclusion9 decks38 decks
3%synergy
Sakura-Tribe Elder
24%inclusion9 decks38 decks
4%synergy
Tatyova, Benthic Druid
21%inclusion8 decks38 decks
-10%synergy
Hullbreaker Horror
21%inclusion8 decks38 decks
3%synergy
Octomancer
18%inclusion7 decks38 decks
14%synergy
Esix, Fractal Bloom
16%inclusion6 decks38 decks
12%synergy
Enduring Curiosity
16%inclusion6 decks38 decks
13%synergy
Uro, Titan of Nature's Wrath
16%inclusion6 decks38 decks
6%synergy
Slinn Voda, the Rising Deep
16%inclusion6 decks38 decks
9%synergy
Delighted Halfling
16%inclusion6 decks38 decks
4%synergy
Phyrexian Metamorph
13%inclusion5 decks38 decks
4%synergy
Kinnan, Bonder Prodigy
13%inclusion5 decks38 decks
10%synergy
Nezahal, Primal Tide
13%inclusion5 decks38 decks
2%synergy
Champion of Lambholt
13%inclusion5 decks38 decks
8%synergy
Saryth, the Viper's Fang
13%inclusion5 decks38 decks
11%synergy
Reclamation Sage
11%inclusion4 decks38 decks
-3%synergy
Thrasios, Triton Hero
11%inclusion4 decks38 decks
3%synergy
Arbor Elf
11%inclusion4 decks38 decks
4%synergy
Scourge of Fleets
11%inclusion4 decks38 decks
3%synergy
Auton Soldier
11%inclusion4 decks38 decks
8%synergy
Glasspool Mimic
11%inclusion4 decks38 decks
6%synergy
Wood Elves
11%inclusion4 decks38 decks
4%synergy
Circle of Dreams Druid
7.9%inclusion3 decks38 decks
6%synergy
Overlord of the Hauntwoods
7.9%inclusion3 decks38 decks
5%synergy
Skyserpent Seeker
7.9%inclusion3 decks38 decks
5%synergy
Coiling Oracle
7.9%inclusion3 decks38 decks
-5%synergy
Hydroid Krasis
7.9%inclusion3 decks38 decks
0%synergy
Progenitor Mimic
7.9%inclusion3 decks38 decks
3%synergy
Toski, Bearer of Secrets
7.9%inclusion3 decks38 decks
4%synergy
Scute Swarm
7.9%inclusion3 decks38 decks
-13%synergy
Tireless Provisioner
7.9%inclusion3 decks38 decks
-7%synergy
Endurance
7.9%inclusion3 decks38 decks
3%synergy
Instants
Pongify
50%inclusion19 decks38 decks
25%synergy
Swan Song
50%inclusion19 decks38 decks
31%synergy
Rapid Hybridization
42%inclusion16 decks38 decks
16%synergy
An Offer You Can't Refuse
39%inclusion15 decks38 decks
16%synergy
Negate
34%inclusion13 decks38 decks
8%synergy
Second Harvest
34%inclusion13 decks38 decks
28%synergy
Growth Spiral
34%inclusion13 decks38 decks
-10%synergy
Arcane Denial
34%inclusion13 decks38 decks
12%synergy
Krosan Grip
29%inclusion11 decks38 decks
21%synergy
Double Major
29%inclusion11 decks38 decks
21%synergy
Nature's Claim
26%inclusion10 decks38 decks
16%synergy
Sink into Stupor
26%inclusion10 decks38 decks
15%synergy
Return of the Wildspeaker
24%inclusion9 decks38 decks
13%synergy
Stubborn Denial
24%inclusion9 decks38 decks
21%synergy
Force of Negation
24%inclusion9 decks38 decks
15%synergy
Force of Vigor
21%inclusion8 decks38 decks
16%synergy
Chord of Calling
21%inclusion8 decks38 decks
13%synergy
Reality Shift
21%inclusion8 decks38 decks
6%synergy
Archdruid's Charm
18%inclusion7 decks38 decks
12%synergy
Noxious Revival
18%inclusion7 decks38 decks
12%synergy
Plasm Capture
16%inclusion6 decks38 decks
12%synergy
Pact of Negation
16%inclusion6 decks38 decks
8%synergy
Brainstorm
13%inclusion5 decks38 decks
-1%synergy
Voidslime
13%inclusion5 decks38 decks
8%synergy
Tamiyo's Safekeeping
13%inclusion5 decks38 decks
7%synergy
Tyvar's Stand
11%inclusion4 decks38 decks
8%synergy
Dispel
11%inclusion4 decks38 decks
6%synergy
Resculpt
11%inclusion4 decks38 decks
5%synergy
Flusterstorm
11%inclusion4 decks38 decks
4%synergy
Delay
11%inclusion4 decks38 decks
8%synergy
Simic Charm
11%inclusion4 decks38 decks
3%synergy
Auroral Procession
8.8%inclusion3 decks34 decks
5%synergy
Consult the Star Charts
8.3%inclusion2 decks24 decks
7%synergy
Mizzium Skin
7.9%inclusion3 decks38 decks
8%synergy
Mental Misstep
7.9%inclusion3 decks38 decks
2%synergy
Snakeskin Veil
7.9%inclusion3 decks38 decks
2%synergy
Wrap in Vigor
7.9%inclusion3 decks38 decks
7%synergy
Mindbreak Trap
7.9%inclusion3 decks38 decks
3%synergy
Legolas's Quick Reflexes
7.9%inclusion3 decks38 decks
5%synergy
Disallow
7.9%inclusion3 decks38 decks
6%synergy
Planar Genesis
7.9%inclusion3 decks38 decks
-3%synergy
Lazotep Plating
7.9%inclusion3 decks38 decks
7%synergy
Spell Pierce
7.9%inclusion3 decks38 decks
5%synergy
Pull from Tomorrow
7.9%inclusion3 decks38 decks
5%synergy
Muddle the Mixture
5.3%inclusion2 decks38 decks
1%synergy
Eureka Moment
5.3%inclusion2 decks38 decks
-6%synergy
Ranger's Guile
5.3%inclusion2 decks38 decks
5%synergy
Three Steps Ahead
5.3%inclusion2 decks38 decks
2%synergy
Rewind
5.3%inclusion2 decks38 decks
2%synergy
Spectral Interference
5.3%inclusion2 decks38 decks
5%synergy
Sorceries
Rampant Growth
63%inclusion24 decks38 decks
23%synergy
Skyshroud Claim
50%inclusion19 decks38 decks
41%synergy
Quantum Misalignment
42%inclusion16 decks38 decks
39%synergy
Overwhelming Stampede
34%inclusion13 decks38 decks
22%synergy
Sea Gate Restoration
26%inclusion10 decks38 decks
21%synergy
Finale of Devastation
26%inclusion10 decks38 decks
14%synergy
Migration Path
24%inclusion9 decks38 decks
20%synergy
Triumph of the Hordes
18%inclusion7 decks38 decks
15%synergy
Turntimber Symbiosis
16%inclusion6 decks38 decks
13%synergy
Into the North
16%inclusion6 decks38 decks
15%synergy
Bala Ged Recovery
16%inclusion6 decks38 decks
6%synergy
Green Sun's Zenith
13%inclusion5 decks38 decks
4%synergy
Windfall
13%inclusion5 decks38 decks
9%synergy
Distant Melody
13%inclusion5 decks38 decks
10%synergy
Shamanic Revelation
13%inclusion5 decks38 decks
8%synergy
Rite of Replication
13%inclusion5 decks38 decks
6%synergy
Nature's Rhythm
12%inclusion4 decks34 decks
6%synergy
Ponder
11%inclusion4 decks38 decks
3%synergy
Rishkar's Expertise
11%inclusion4 decks38 decks
2%synergy
Explore
11%inclusion4 decks38 decks
-10%synergy
Regrowth
11%inclusion4 decks38 decks
7%synergy
Vastwood Surge
11%inclusion4 decks38 decks
9%synergy
Explosive Vegetation
11%inclusion4 decks38 decks
5%synergy
Inundate
7.9%inclusion3 decks38 decks
8%synergy
Ranger's Path
7.9%inclusion3 decks38 decks
7%synergy
Preordain
7.9%inclusion3 decks38 decks
0%synergy
Tempt with Discovery
7.9%inclusion3 decks38 decks
4%synergy
Hunting Wilds
7.9%inclusion3 decks38 decks
7%synergy
Bridgeworks Battle
7.9%inclusion3 decks38 decks
3%synergy
Expropriate
7.9%inclusion3 decks38 decks
6%synergy
Shared Roots
6.3%inclusion1 decks16 decks
3%synergy
Polymorph
5.3%inclusion2 decks38 decks
5%synergy
Stock Up
5.3%inclusion2 decks38 decks
4%synergy
Overrun
5.3%inclusion2 decks38 decks
3%synergy
Natural Order
5.3%inclusion2 decks38 decks
4%synergy
Sylvan Tutor
5.3%inclusion2 decks38 decks
4%synergy
Curse of the Swine
5.3%inclusion2 decks38 decks
-6%synergy
Nissa's Pilgrimage
5.3%inclusion2 decks38 decks
4%synergy
Raise the Palisade
5.3%inclusion2 decks38 decks
-1%synergy
Glimpse the Core
5.3%inclusion2 decks38 decks
4%synergy
Parallel Evolution
5.3%inclusion2 decks38 decks
5%synergy
Search for Tomorrow
5.3%inclusion2 decks38 decks
1%synergy
Utility Artifacts
Lightning Greaves
63%inclusion24 decks38 decks
41%synergy
Helm of the Host
45%inclusion17 decks38 decks
39%synergy
Swiftfoot Boots
37%inclusion14 decks38 decks
11%synergy
The Great Henge
34%inclusion13 decks38 decks
25%synergy
Emerald Medallion
21%inclusion8 decks38 decks
18%synergy
Mirror Box
18%inclusion7 decks38 decks
15%synergy
Combine Chrysalis
16%inclusion6 decks38 decks
12%synergy
Coat of Arms
13%inclusion5 decks38 decks
12%synergy
Eldrazi Monument
13%inclusion5 decks38 decks
13%synergy
Sapphire Medallion
13%inclusion5 decks38 decks
10%synergy
Skullclamp
7.9%inclusion3 decks38 decks
7%synergy
Proteus Staff
7.9%inclusion3 decks38 decks
8%synergy
Banner of Kinship
5.3%inclusion2 decks38 decks
3%synergy
Champion's Helm
5.3%inclusion2 decks38 decks
5%synergy
Enchantments
Tribute to the World Tree
61%inclusion23 decks38 decks
54%synergy
Kindred Discovery
47%inclusion18 decks38 decks
38%synergy
Mystic Remora
39%inclusion15 decks38 decks
24%synergy
Defense of the Heart
26%inclusion10 decks38 decks
24%synergy
Utopia Sprawl
21%inclusion8 decks38 decks
14%synergy
Cryptolith Rite
21%inclusion8 decks38 decks
18%synergy
Sylvan Library
21%inclusion8 decks38 decks
12%synergy
Paradox Haze
21%inclusion8 decks38 decks
21%synergy
Growing Rites of Itlimoc
21%inclusion8 decks38 decks
15%synergy
Moonlit Meditation
17%inclusion4 decks24 decks
15%synergy
Beastmaster Ascension
16%inclusion6 decks38 decks
13%synergy
Wild Growth
16%inclusion6 decks38 decks
7%synergy
Primal Vigor
16%inclusion6 decks38 decks
13%synergy
Exploration
13%inclusion5 decks38 decks
0%synergy
Garruk's Uprising
13%inclusion5 decks38 decks
-3%synergy
Extravagant Replication
11%inclusion4 decks38 decks
8%synergy
Dismiss into Dream
11%inclusion4 decks38 decks
10%synergy
Opposition
7.9%inclusion3 decks38 decks
8%synergy
Amphibian Downpour
7.9%inclusion3 decks38 decks
3%synergy
Verity Circle
5.3%inclusion2 decks38 decks
5%synergy
Imprisoned in the Moon
5.3%inclusion2 decks38 decks
1%synergy
Unnatural Growth
5.3%inclusion2 decks38 decks
2%synergy
Quest for Ula's Temple
5.3%inclusion2 decks38 decks
3%synergy
Propaganda
5.3%inclusion2 decks38 decks
-1%synergy
Battles
Invasion of Ikoria
13%inclusion5 decks38 decks
9%synergy
Invasion of Zendikar
7.9%inclusion3 decks38 decks
6%synergy
Planeswalkers
Oko, Thief of Crowns
39%inclusion15 decks38 decks
32%synergy
Kiora, Master of the Depths
5.3%inclusion2 decks38 decks
3%synergy
Utility Lands
Boseiju, Who Endures
58%inclusion22 decks38 decks
35%synergy
Reliquary Tower
53%inclusion20 decks38 decks
3%synergy
Yavimaya, Cradle of Growth
50%inclusion19 decks38 decks
28%synergy
Otawara, Soaring City
50%inclusion19 decks38 decks
31%synergy
Command Beacon
34%inclusion13 decks38 decks
30%synergy
Three Tree City
34%inclusion13 decks38 decks
29%synergy
Mistrise Village
32%inclusion11 decks34 decks
22%synergy
Alchemist's Refuge
24%inclusion9 decks38 decks
6%synergy
Mystic Sanctuary
21%inclusion8 decks38 decks
9%synergy
Urza's Saga
13%inclusion5 decks38 decks
8%synergy
Evendo, Waking Haven
13%inclusion3 decks24 decks
7%synergy
Dryad Arbor
11%inclusion4 decks38 decks
5%synergy
Castle Garenbrig
11%inclusion4 decks38 decks
6%synergy
Temple of the False God
7.9%inclusion3 decks38 decks
-8%synergy
Strip Mine
7.9%inclusion3 decks38 decks
5%synergy
Rogue's Passage
7.9%inclusion3 decks38 decks
-14%synergy
Wasteland
5.3%inclusion2 decks38 decks
4%synergy
Yavimaya Hollow
5.3%inclusion2 decks38 decks
5%synergy
Scavenger Grounds
5.3%inclusion2 decks38 decks
1%synergy
Dark Depths
5.3%inclusion2 decks38 decks
-1%synergy
Oboro, Palace in the Clouds
5.3%inclusion2 decks38 decks
3%synergy
Emergence Zone
5.3%inclusion2 decks38 decks
1%synergy
Shifting Woodland
5.3%inclusion2 decks38 decks
-1%synergy
Homeward Path
5.3%inclusion2 decks38 decks
3%synergy
Gingerbread Cabin
5.3%inclusion2 decks38 decks
4%synergy
Mana Artifacts
Sol Ring
100%inclusion38 decks38 decks
19%synergy
Arcane Signet
76%inclusion29 decks38 decks
13%synergy
Talisman of Curiosity
42%inclusion16 decks38 decks
20%synergy
Thought Vessel
34%inclusion13 decks38 decks
14%synergy
Simic Signet
32%inclusion12 decks38 decks
0%synergy
Fellwar Stone
32%inclusion12 decks38 decks
22%synergy
Everflowing Chalice
7.9%inclusion3 decks38 decks
4%synergy
Commander's Sphere
7.9%inclusion3 decks38 decks
0%synergy
Lotus Petal
7.9%inclusion3 decks38 decks
1%synergy
Decanter of Endless Water
7.9%inclusion3 decks38 decks
3%synergy
Moss Diamond
5.3%inclusion2 decks38 decks
4%synergy
Sky Diamond
5.3%inclusion2 decks38 decks
4%synergy
Chromatic Lantern
5.3%inclusion2 decks38 decks
3%synergy
Liquimetal Torque
5.3%inclusion2 decks38 decks
4%synergy
Lands
Breeding Pool
95%inclusion36 decks38 decks
48%synergy
Command Tower
87%inclusion33 decks38 decks
2%synergy
Island
87%inclusion33 decks38 decks
-9%synergy
Forest
87%inclusion33 decks38 decks
-8%synergy
Rejuvenating Springs
84%inclusion32 decks38 decks
40%synergy
Misty Rainforest
82%inclusion31 decks38 decks
50%synergy
Tropical Island
76%inclusion29 decks38 decks
62%synergy
Hinterland Harbor
68%inclusion26 decks38 decks
9%synergy
Yavimaya Coast
63%inclusion24 decks38 decks
11%synergy
Hedge Maze
61%inclusion23 decks38 decks
41%synergy
Flooded Grove
50%inclusion19 decks38 decks
9%synergy
Waterlogged Grove
47%inclusion18 decks38 decks
27%synergy
Dreamroot Cascade
47%inclusion18 decks38 decks
5%synergy
Willowrush Verge
39%inclusion15 decks38 decks
23%synergy
Barkchannel Pathway
39%inclusion15 decks38 decks
19%synergy
Scalding Tarn
34%inclusion13 decks38 decks
24%synergy
Windswept Heath
32%inclusion12 decks38 decks
21%synergy
Verdant Catacombs
32%inclusion12 decks38 decks
22%synergy
Flooded Strand
32%inclusion12 decks38 decks
20%synergy
Snow-Covered Island
29%inclusion11 decks38 decks
22%synergy
Wooded Foothills
29%inclusion11 decks38 decks
19%synergy
Snow-Covered Forest
26%inclusion10 decks38 decks
20%synergy
Sink into Stupor
26%inclusion10 decks38 decks
15%synergy
Sea Gate Restoration
26%inclusion10 decks38 decks
21%synergy
Polluted Delta
26%inclusion10 decks38 decks
16%synergy
Simic Growth Chamber
24%inclusion9 decks38 decks
-24%synergy
Prismatic Vista
24%inclusion9 decks38 decks
16%synergy
Fabled Passage
24%inclusion9 decks38 decks
9%synergy
Rimewood Falls
24%inclusion9 decks38 decks
15%synergy
Temple of Mystery
21%inclusion8 decks38 decks
-17%synergy
Mana Confluence
18%inclusion7 decks38 decks
13%synergy
Vineglimmer Snarl
16%inclusion6 decks38 decks
-23%synergy
Turntimber Symbiosis
16%inclusion6 decks38 decks
13%synergy
Bala Ged Recovery
16%inclusion6 decks38 decks
6%synergy
City of Brass
16%inclusion6 decks38 decks
10%synergy
Overflowing Basin
13%inclusion5 decks38 decks
-6%synergy
Tangled Islet
13%inclusion5 decks38 decks
-3%synergy
Myriad Landscape
11%inclusion4 decks38 decks
-11%synergy
Reflecting Pool
11%inclusion4 decks38 decks
7%synergy
Botanical Sanctum
11%inclusion4 decks38 decks
-2%synergy
Path of Ancestry
11%inclusion4 decks38 decks
-7%synergy
Glasspool Mimic
11%inclusion4 decks38 decks
6%synergy
Thornwood Falls
11%inclusion4 decks38 decks
-7%synergy
Exotic Orchard
7.9%inclusion3 decks38 decks
-16%synergy
Evolving Wilds
7.9%inclusion3 decks38 decks
-17%synergy
Gemstone Caverns
7.9%inclusion3 decks38 decks
2%synergy
Bridgeworks Battle
7.9%inclusion3 decks38 decks
3%synergy
Terramorphic Expanse
5.3%inclusion2 decks38 decks
-14%synergy
Disciple of Freyalise
5.3%inclusion2 decks38 decks
0%synergy
Tangled Florahedron
5.3%inclusion2 decks38 decks
4%synergy
About UsContactPrivacy PolicyTerms of Service
Space Cow MediaArchidektCardsphereCommander SpellbookFABRECSpellvoid
Space Cow MediaArchidektCommander's Herald
Commander SpellbookFABRECSpellvoid
EDHREC is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.
next@15 test