Koma, Cosmos Serpent (Commander) - Budget Upgraded

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #300
36decks
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
Ember Island Production
10%inclusion1 decks10 decks
9%synergy
The Legend of Kyoshi
10%inclusion1 decks10 decks
9%synergy
Secret of Bloodbending
9.1%inclusion1 decks11 decks
9%synergy
Seismic Sense
9.1%inclusion1 decks11 decks
9%synergy
The Unagi of Kyoshi Island
9.1%inclusion1 decks11 decks
4%synergy
High Synergy Cards
Whelming Wave
75%inclusion27 decks36 decks
64%synergy
Koma, World-Eater
57%inclusion20 decks35 decks
44%synergy
Elemental Bond
47%inclusion17 decks36 decks
42%synergy
Junk Winder
47%inclusion17 decks36 decks
41%synergy
Arixmethes, Slumbering Isle
53%inclusion19 decks36 decks
39%synergy
Adrix and Nev, Twincasters
44%inclusion16 decks36 decks
36%synergy
Scourge of Fleets
42%inclusion15 decks36 decks
34%synergy
Esix, Fractal Bloom
36%inclusion13 decks36 decks
32%synergy
Garruk's Packleader
33%inclusion12 decks36 decks
31%synergy
Slinn Voda, the Rising Deep
36%inclusion13 decks36 decks
30%synergy
Top Cards
Rampant Growth
64%inclusion23 decks36 decks
23%synergy
Counterspell
61%inclusion22 decks36 decks
11%synergy
Tatyova, Benthic Druid
58%inclusion21 decks36 decks
27%synergy
Llanowar Elves
53%inclusion19 decks36 decks
25%synergy
Beast Within
50%inclusion18 decks36 decks
0%synergy
Kodama's Reach
50%inclusion18 decks36 decks
14%synergy
Cultivate
50%inclusion18 decks36 decks
3%synergy
Growth Spiral
47%inclusion17 decks36 decks
3%synergy
Reality Shift
42%inclusion15 decks36 decks
27%synergy
Murkfiend Liege
42%inclusion15 decks36 decks
27%synergy
Game Changers
Seedborn Muse
11%inclusion4 decks36 decks
-5%synergy
Thassa's Oracle
5.6%inclusion2 decks36 decks
0%synergy
Creatures
Sakura-Tribe Elder
42%inclusion15 decks36 decks
22%synergy
Aesi, Tyrant of Gyre Strait
39%inclusion14 decks36 decks
22%synergy
Rampaging Baloths
39%inclusion14 decks36 decks
22%synergy
Elvish Mystic
33%inclusion12 decks36 decks
9%synergy
Coiling Oracle
33%inclusion12 decks36 decks
20%synergy
Reclamation Sage
28%inclusion10 decks36 decks
14%synergy
Stormtide Leviathan
28%inclusion10 decks36 decks
22%synergy
Nadir Kraken
28%inclusion10 decks36 decks
24%synergy
Archetype of Imagination
25%inclusion9 decks36 decks
21%synergy
Fyndhorn Elves
25%inclusion9 decks36 decks
9%synergy
Eternal Witness
25%inclusion9 decks36 decks
4%synergy
Avenger of Zendikar
25%inclusion9 decks36 decks
7%synergy
Simic Sky Swallower
25%inclusion9 decks36 decks
21%synergy
Summon: Leviathan
23%inclusion6 decks26 decks
16%synergy
Inkwell Leviathan
22%inclusion8 decks36 decks
18%synergy
Starwinder
21%inclusion4 decks19 decks
14%synergy
Hullbreaker Horror
19%inclusion7 decks36 decks
2%synergy
Octomancer
19%inclusion7 decks36 decks
15%synergy
Scute Swarm
19%inclusion7 decks36 decks
-1%synergy
Ohran Frostfang
17%inclusion6 decks36 decks
13%synergy
Spawning Kraken
17%inclusion6 decks36 decks
9%synergy
Inga and Esika
17%inclusion6 decks36 decks
14%synergy
Fierce Empath
17%inclusion6 decks36 decks
14%synergy
Tromokratis
17%inclusion6 decks36 decks
11%synergy
Rashmi, Eternities Crafter
17%inclusion6 decks36 decks
14%synergy
Xolatoyac, the Smiling Flood
17%inclusion6 decks36 decks
9%synergy
Saryth, the Viper's Fang
17%inclusion6 decks36 decks
15%synergy
Chasm Skulker
17%inclusion6 decks36 decks
10%synergy
Troyan, Gutsy Explorer
14%inclusion5 decks36 decks
11%synergy
Mystic Snake
14%inclusion5 decks36 decks
10%synergy
Hydroid Krasis
14%inclusion5 decks36 decks
6%synergy
Stormsurge Kraken
14%inclusion5 decks36 decks
10%synergy
Trygon Predator
14%inclusion5 decks36 decks
7%synergy
Serpent of Yawning Depths
14%inclusion5 decks36 decks
8%synergy
Topiary Stomper
14%inclusion5 decks36 decks
11%synergy
Spark Double
14%inclusion5 decks36 decks
4%synergy
Chameleon, Master of Disguise
13%inclusion2 decks15 decks
11%synergy
Sin, Unending Cataclysm
12%inclusion3 decks26 decks
8%synergy
Kiora, the Rising Tide
11%inclusion4 decks35 decks
8%synergy
Forgotten Ancient
11%inclusion4 decks36 decks
4%synergy
Beast Whisperer
11%inclusion4 decks36 decks
2%synergy
Yavimaya Elder
11%inclusion4 decks36 decks
8%synergy
Colossal Skyturtle
11%inclusion4 decks36 decks
5%synergy
Gala Greeters
11%inclusion4 decks36 decks
9%synergy
Shipbreaker Kraken
11%inclusion4 decks36 decks
8%synergy
Terastodon
11%inclusion4 decks36 decks
3%synergy
Frilled Mystic
11%inclusion4 decks36 decks
8%synergy
Toski, Bearer of Secrets
11%inclusion4 decks36 decks
8%synergy
Champion of Lambholt
11%inclusion4 decks36 decks
6%synergy
Brinelin, the Moon Kraken
11%inclusion4 decks36 decks
7%synergy
Instants
Negate
39%inclusion14 decks36 decks
13%synergy
Return of the Wildspeaker
31%inclusion11 decks36 decks
20%synergy
Aetherize
31%inclusion11 decks36 decks
19%synergy
An Offer You Can't Refuse
28%inclusion10 decks36 decks
5%synergy
Harrow
28%inclusion10 decks36 decks
16%synergy
Planar Genesis
22%inclusion8 decks36 decks
11%synergy
Double Major
19%inclusion7 decks36 decks
11%synergy
Perplexing Test
17%inclusion6 decks36 decks
12%synergy
Arcane Denial
17%inclusion6 decks36 decks
-6%synergy
Simic Charm
17%inclusion6 decks36 decks
9%synergy
Decisive Denial
17%inclusion6 decks36 decks
12%synergy
Eureka Moment
17%inclusion6 decks36 decks
6%synergy
Voidslime
14%inclusion5 decks36 decks
9%synergy
Fog
14%inclusion5 decks36 decks
11%synergy
Brainstorm
14%inclusion5 decks36 decks
0%synergy
Return to Nature
14%inclusion5 decks36 decks
8%synergy
Pongify
14%inclusion5 decks36 decks
-11%synergy
Plasm Capture
14%inclusion5 decks36 decks
10%synergy
Second Harvest
14%inclusion5 decks36 decks
8%synergy
Prishe's Wanderings
12%inclusion3 decks25 decks
11%synergy
Sublime Epiphany
11%inclusion4 decks36 decks
9%synergy
Roiling Regrowth
11%inclusion4 decks36 decks
7%synergy
Nature's Claim
11%inclusion4 decks36 decks
1%synergy
Entish Restoration
11%inclusion4 decks36 decks
2%synergy
Resculpt
11%inclusion4 decks36 decks
5%synergy
Rapid Hybridization
11%inclusion4 decks36 decks
-15%synergy
Rewind
11%inclusion4 decks36 decks
8%synergy
Spell Pierce
11%inclusion4 decks36 decks
8%synergy
High Tide
11%inclusion4 decks36 decks
9%synergy
Auroral Procession
10%inclusion3 decks30 decks
6%synergy
Refute
8.6%inclusion3 decks35 decks
7%synergy
Jaheira's Respite
8.3%inclusion3 decks36 decks
7%synergy
Heroic Intervention
8.3%inclusion3 decks36 decks
-22%synergy
Mystical Dispute
8.3%inclusion3 decks36 decks
8%synergy
Mystic Reflection
8.3%inclusion3 decks36 decks
6%synergy
Opt
8.3%inclusion3 decks36 decks
1%synergy
Cancel
8.3%inclusion3 decks36 decks
6%synergy
Slip Out the Back
8.3%inclusion3 decks36 decks
5%synergy
Into the Roil
8.3%inclusion3 decks36 decks
7%synergy
Frantic Search
8.3%inclusion3 decks36 decks
3%synergy
Biomass Mutation
8.3%inclusion3 decks36 decks
5%synergy
Cryptic Command
8.3%inclusion3 decks36 decks
7%synergy
Memory Deluge
8.3%inclusion3 decks36 decks
8%synergy
Snakeskin Veil
8.3%inclusion3 decks36 decks
3%synergy
Krosan Grip
8.3%inclusion3 decks36 decks
0%synergy
Essence Scatter
8.3%inclusion3 decks36 decks
7%synergy
Barrier Breach
8.3%inclusion3 decks36 decks
8%synergy
Joint Exploration
8.3%inclusion3 decks36 decks
3%synergy
Collective Resistance
8.3%inclusion3 decks36 decks
5%synergy
Mystic Confluence
8.3%inclusion3 decks36 decks
5%synergy
Sorceries
Explore
39%inclusion14 decks36 decks
19%synergy
Farseek
36%inclusion13 decks36 decks
11%synergy
Urban Evolution
33%inclusion12 decks36 decks
24%synergy
Nature's Lore
25%inclusion9 decks36 decks
-5%synergy
Overwhelming Stampede
22%inclusion8 decks36 decks
10%synergy
Curse of the Swine
22%inclusion8 decks36 decks
11%synergy
Harmonize
19%inclusion7 decks36 decks
14%synergy
Skyshroud Claim
17%inclusion6 decks36 decks
8%synergy
Grow from the Ashes
17%inclusion6 decks36 decks
15%synergy
Migration Path
17%inclusion6 decks36 decks
13%synergy
Spitting Image
14%inclusion5 decks36 decks
12%synergy
Explosive Vegetation
14%inclusion5 decks36 decks
8%synergy
Search for Tomorrow
14%inclusion5 decks36 decks
9%synergy
Oversimplify
11%inclusion4 decks36 decks
7%synergy
River's Rebuke
11%inclusion4 decks36 decks
8%synergy
Ezuri's Predation
11%inclusion4 decks36 decks
3%synergy
Rite of Replication
11%inclusion4 decks36 decks
4%synergy
Circuitous Route
11%inclusion4 decks36 decks
9%synergy
Irenicus's Vile Duplication
11%inclusion4 decks36 decks
5%synergy
Shamanic Revelation
11%inclusion4 decks36 decks
6%synergy
Shared Roots
9.1%inclusion1 decks11 decks
6%synergy
Ponder
8.3%inclusion3 decks36 decks
1%synergy
Flood of Tears
8.3%inclusion3 decks36 decks
6%synergy
Rishkar's Expertise
8.3%inclusion3 decks36 decks
0%synergy
Preordain
8.3%inclusion3 decks36 decks
0%synergy
Bushwhack
8.3%inclusion3 decks36 decks
6%synergy
Regrowth
8.3%inclusion3 decks36 decks
5%synergy
Relm's Sketching
7.7%inclusion2 decks26 decks
6%synergy
Nature's Rhythm
6.7%inclusion2 decks30 decks
1%synergy
Waterbending Lesson
6.7%inclusion1 decks15 decks
7%synergy
Preposterous Proportions
5.7%inclusion2 decks35 decks
4%synergy
Traverse the Outlands
5.6%inclusion2 decks36 decks
2%synergy
Wear Down
5.6%inclusion2 decks36 decks
4%synergy
Primal Command
5.6%inclusion2 decks36 decks
5%synergy
Hour of Promise
5.6%inclusion2 decks36 decks
2%synergy
Broken Bond
5.6%inclusion2 decks36 decks
1%synergy
Bridgeworks Battle
5.6%inclusion2 decks36 decks
1%synergy
Aether Gale
5.6%inclusion2 decks36 decks
4%synergy
Flare of Cultivation
5.6%inclusion2 decks36 decks
3%synergy
Ranger's Path
5.6%inclusion2 decks36 decks
5%synergy
Sakashima's Will
5.6%inclusion2 decks36 decks
5%synergy
Triumph of the Hordes
5.6%inclusion2 decks36 decks
3%synergy
Wash Out
5.6%inclusion2 decks36 decks
5%synergy
Deep Analysis
5.6%inclusion2 decks36 decks
5%synergy
Treasure Cruise
5.6%inclusion2 decks36 decks
2%synergy
Three Visits
5.6%inclusion2 decks36 decks
-17%synergy
Consuming Tide
5.6%inclusion2 decks36 decks
3%synergy
Divination
5.6%inclusion2 decks36 decks
5%synergy
Peregrination
5.6%inclusion2 decks36 decks
5%synergy
Tooth and Nail
5.6%inclusion2 decks36 decks
4%synergy
Utility Artifacts
Swiftfoot Boots
28%inclusion10 decks36 decks
2%synergy
Combine Chrysalis
28%inclusion10 decks36 decks
23%synergy
Lightning Greaves
17%inclusion6 decks36 decks
-5%synergy
Idol of Oblivion
11%inclusion4 decks36 decks
8%synergy
Mirror Box
8.3%inclusion3 decks36 decks
5%synergy
Bident of Thassa
8.3%inclusion3 decks36 decks
1%synergy
Neurok Stealthsuit
5.6%inclusion2 decks36 decks
5%synergy
Emerald Medallion
5.6%inclusion2 decks36 decks
3%synergy
Quicksilver Amulet
5.6%inclusion2 decks36 decks
5%synergy
Expedition Map
5.6%inclusion2 decks36 decks
1%synergy
Enchantments
Garruk's Uprising
28%inclusion10 decks36 decks
11%synergy
Wilderness Reclamation
25%inclusion9 decks36 decks
16%synergy
Imprisoned in the Moon
19%inclusion7 decks36 decks
15%synergy
Primal Vigor
17%inclusion6 decks36 decks
14%synergy
Propaganda
17%inclusion6 decks36 decks
10%synergy
Kindred Discovery
17%inclusion6 decks36 decks
7%synergy
Growing Rites of Itlimoc
14%inclusion5 decks36 decks
8%synergy
Beastmaster Ascension
14%inclusion5 decks36 decks
11%synergy
Wild Growth
14%inclusion5 decks36 decks
5%synergy
Verity Circle
11%inclusion4 decks36 decks
11%synergy
Eusocial Engineering
11%inclusion2 decks19 decks
9%synergy
Moonlit Meditation
11%inclusion2 decks19 decks
9%synergy
Utopia Sprawl
8.3%inclusion3 decks36 decks
2%synergy
Unnatural Growth
8.3%inclusion3 decks36 decks
5%synergy
Kenrith's Transformation
8.3%inclusion3 decks36 decks
4%synergy
Primeval Bounty
8.3%inclusion3 decks36 decks
6%synergy
Cryptolith Rite
8.3%inclusion3 decks36 decks
5%synergy
Extravagant Replication
8.3%inclusion3 decks36 decks
6%synergy
Simic Ascendancy
8.3%inclusion3 decks36 decks
-5%synergy
Khalni Heart Expedition
8.3%inclusion3 decks36 decks
4%synergy
Mystic Remora
8.3%inclusion3 decks36 decks
-7%synergy
Mana Reflection
8.3%inclusion3 decks36 decks
4%synergy
Impostor Syndrome
6.7%inclusion1 decks15 decks
5%synergy
March of the World Ooze
5.9%inclusion2 decks34 decks
5%synergy
Dismiss into Dream
5.6%inclusion2 decks36 decks
5%synergy
Opposition
5.6%inclusion2 decks36 decks
5%synergy
Doubling Season
5.6%inclusion2 decks36 decks
-4%synergy
Tribute to the World Tree
5.6%inclusion2 decks36 decks
-1%synergy
Mirrormade
5.6%inclusion2 decks36 decks
4%synergy
Kiora Bests the Sea God
5.6%inclusion2 decks36 decks
4%synergy
New Horizons
5.6%inclusion2 decks36 decks
5%synergy
Primal Rage
5.6%inclusion2 decks36 decks
5%synergy
Carpet of Flowers
5.6%inclusion2 decks36 decks
3%synergy
Retreat to Kazandu
5.6%inclusion2 decks36 decks
1%synergy
Sandwurm Convergence
5.6%inclusion2 decks36 decks
3%synergy
Lignify
5.6%inclusion2 decks36 decks
4%synergy
Witness Protection
5.6%inclusion2 decks36 decks
3%synergy
Zendikar's Roil
5.6%inclusion2 decks36 decks
1%synergy
Fertile Ground
5.6%inclusion2 decks36 decks
4%synergy
Overgrowth
5.6%inclusion2 decks36 decks
5%synergy
Cryoshatter
5.3%inclusion1 decks19 decks
5%synergy
Battles
Invasion of Zendikar
5.6%inclusion2 decks36 decks
4%synergy
Planeswalkers
Kiora, Master of the Depths
11%inclusion4 decks36 decks
9%synergy
Kiora, Behemoth Beckoner
11%inclusion4 decks36 decks
5%synergy
Oko, Thief of Crowns
8.3%inclusion3 decks36 decks
1%synergy
Nissa, Steward of Elements
8.3%inclusion3 decks36 decks
4%synergy
Wrenn and Seven
5.6%inclusion2 decks36 decks
3%synergy
Kiora, the Crashing Wave
5.6%inclusion2 decks36 decks
3%synergy
Utility Lands
Reliquary Tower
50%inclusion18 decks36 decks
0%synergy
Alchemist's Refuge
19%inclusion7 decks36 decks
2%synergy
Temple of the False God
19%inclusion7 decks36 decks
4%synergy
Rogue's Passage
19%inclusion7 decks36 decks
-2%synergy
Mosswort Bridge
17%inclusion6 decks36 decks
-1%synergy
Lumbering Falls
14%inclusion5 decks36 decks
7%synergy
Restless Vinestalk
8.3%inclusion3 decks36 decks
3%synergy
Bonders' Enclave
8.3%inclusion3 decks36 decks
7%synergy
Castle Vantress
8.3%inclusion3 decks36 decks
1%synergy
Command Beacon
5.6%inclusion2 decks36 decks
1%synergy
Thespian's Stage
5.6%inclusion2 decks36 decks
-1%synergy
Coral Atoll
5.6%inclusion2 decks36 decks
3%synergy
Scavenger Grounds
5.6%inclusion2 decks36 decks
1%synergy
Jungle Basin
5.6%inclusion2 decks36 decks
3%synergy
Mystic Sanctuary
5.6%inclusion2 decks36 decks
-7%synergy
Memorial to Genius
5.6%inclusion2 decks36 decks
5%synergy
Mana Artifacts
Sol Ring
81%inclusion29 decks36 decks
0%synergy
Arcane Signet
58%inclusion21 decks36 decks
-5%synergy
Simic Signet
31%inclusion11 decks36 decks
-1%synergy
Commander's Sphere
25%inclusion9 decks36 decks
17%synergy
Thought Vessel
22%inclusion8 decks36 decks
2%synergy
Talisman of Curiosity
19%inclusion7 decks36 decks
-2%synergy
Mind Stone
8.3%inclusion3 decks36 decks
4%synergy
Herd Heirloom
6.7%inclusion2 decks30 decks
4%synergy
Bender's Waterskin
6.7%inclusion1 decks15 decks
6%synergy
Sky Diamond
5.6%inclusion2 decks36 decks
4%synergy
Moss Diamond
5.6%inclusion2 decks36 decks
4%synergy
Lands
Forest
100%inclusion36 decks36 decks
5%synergy
Island
100%inclusion36 decks36 decks
5%synergy
Command Tower
72%inclusion26 decks36 decks
-13%synergy
Simic Growth Chamber
61%inclusion22 decks36 decks
13%synergy
Evolving Wilds
53%inclusion19 decks36 decks
28%synergy
Temple of Mystery
50%inclusion18 decks36 decks
12%synergy
Thornwood Falls
44%inclusion16 decks36 decks
27%synergy
Vineglimmer Snarl
44%inclusion16 decks36 decks
6%synergy
Flooded Grove
42%inclusion15 decks36 decks
1%synergy
Hinterland Harbor
42%inclusion15 decks36 decks
-18%synergy
Yavimaya Coast
39%inclusion14 decks36 decks
-14%synergy
Terramorphic Expanse
36%inclusion13 decks36 decks
16%synergy
Tangled Islet
31%inclusion11 decks36 decks
14%synergy
Simic Guildgate
31%inclusion11 decks36 decks
20%synergy
Woodland Stream
22%inclusion8 decks36 decks
17%synergy
Dreamroot Cascade
19%inclusion7 decks36 decks
-23%synergy
Exotic Orchard
19%inclusion7 decks36 decks
-4%synergy
Myriad Landscape
19%inclusion7 decks36 decks
-3%synergy
Blighted Woodland
17%inclusion6 decks36 decks
9%synergy
Littjara Mirrorlake
17%inclusion6 decks36 decks
13%synergy
Overflowing Basin
14%inclusion5 decks36 decks
-5%synergy
Path of Ancestry
14%inclusion5 decks36 decks
-3%synergy
Rimewood Falls
14%inclusion5 decks36 decks
5%synergy
Quandrix Campus
11%inclusion4 decks36 decks
4%synergy
Barkchannel Pathway
11%inclusion4 decks36 decks
-9%synergy
Brokers Hideout
11%inclusion4 decks36 decks
6%synergy
Rejuvenating Springs
8.3%inclusion3 decks36 decks
-36%synergy
Vibrant Cityscape
6.7%inclusion1 decks15 decks
5%synergy
Breeding Pool
5.6%inclusion2 decks36 decks
-40%synergy
Disciple of Freyalise
5.6%inclusion2 decks36 decks
1%synergy
Bridgeworks Battle
5.6%inclusion2 decks36 decks
1%synergy
Lush Oasis
5.6%inclusion2 decks36 decks
0%synergy
Tanglepool Bridge
5.6%inclusion2 decks36 decks
1%synergy
Vivid Creek
5.6%inclusion2 decks36 decks
4%synergy
Tangled Florahedron
5.6%inclusion2 decks36 decks
4%synergy
Drowner of Truth
5.6%inclusion2 decks36 decks
4%synergy
Ash Barrens
5.6%inclusion2 decks36 decks
2%synergy
Snow-Covered Island
5.6%inclusion2 decks36 decks
-1%synergy
Waterlogged Grove
5.6%inclusion2 decks36 decks
-15%synergy
Botanical Sanctum
5.6%inclusion2 decks36 decks
-7%synergy
Command Bridge
5.0%inclusion1 decks20 decks
5%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