Koma, Cosmos Serpent (Commander) - Sea Creatures

Alternate Names:

The Monstrous SerpentThe Monstrous Serpent

Koma, Cosmos Serpent
Rank #304
140decks
As CommanderAs CardAverage DeckDecks
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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
26%inclusion5 decks19 decks
21%synergy
Ember Island Production
11%inclusion2 decks19 decks
10%synergy
Spirit Water Revival
5.3%inclusion1 decks19 decks
4%synergy
Shared Roots
5.3%inclusion1 decks19 decks
2%synergy
Agna Qel'a
5.3%inclusion1 decks19 decks
4%synergy
High Synergy Cards
Serpent of Yawning Depths
86%inclusion120 decks140 decks
79%synergy
Whelming Wave
90%inclusion126 decks140 decks
79%synergy
Spawning Kraken
74%inclusion103 decks140 decks
66%synergy
Slinn Voda, the Rising Deep
69%inclusion97 decks140 decks
63%synergy
Junk Winder
68%inclusion95 decks140 decks
61%synergy
Koma, World-Eater
73%inclusion49 decks67 decks
60%synergy
Arixmethes, Slumbering Isle
73%inclusion102 decks140 decks
59%synergy
Aesi, Tyrant of Gyre Strait
76%inclusion106 decks140 decks
58%synergy
Adrix and Nev, Twincasters
61%inclusion86 decks140 decks
53%synergy
Stormtide Leviathan
54%inclusion75 decks140 decks
48%synergy
Top Cards
Cultivate
81%inclusion113 decks140 decks
34%synergy
Kodama's Reach
76%inclusion106 decks140 decks
40%synergy
Rampant Growth
76%inclusion106 decks140 decks
35%synergy
Counterspell
71%inclusion100 decks140 decks
21%synergy
Growth Spiral
69%inclusion96 decks140 decks
24%synergy
Hullbreaker Horror
62%inclusion87 decks140 decks
44%synergy
Beast Within
56%inclusion78 decks140 decks
6%synergy
Scourge of Fleets
55%inclusion77 decks140 decks
47%synergy
Elemental Bond
51%inclusion72 decks140 decks
46%synergy
Xolatoyac, the Smiling Flood
51%inclusion71 decks140 decks
43%synergy
Game Changers
Cyclonic Rift
38%inclusion53 decks140 decks
12%synergy
Rhystic Study
29%inclusion41 decks140 decks
8%synergy
Fierce Guardianship
21%inclusion30 decks140 decks
4%synergy
Worldly Tutor
12%inclusion17 decks140 decks
-3%synergy
Seedborn Muse
11%inclusion15 decks140 decks
-5%synergy
Ancient Tomb
7.9%inclusion11 decks140 decks
-2%synergy
Mystical Tutor
7.9%inclusion11 decks140 decks
-1%synergy
Consecrated Sphinx
7.1%inclusion10 decks140 decks
-2%synergy
Creatures
Nadir Kraken
51%inclusion71 decks140 decks
47%synergy
Tromokratis
49%inclusion68 decks140 decks
43%synergy
Kiora, Sovereign of the Deep
46%inclusion65 decks140 decks
44%synergy
Inkwell Leviathan
44%inclusion62 decks140 decks
40%synergy
Summon: Leviathan
44%inclusion14 decks32 decks
37%synergy
Stormsurge Kraken
44%inclusion61 decks140 decks
39%synergy
Deep-Sea Kraken
39%inclusion55 decks140 decks
36%synergy
Nezahal, Primal Tide
39%inclusion55 decks140 decks
28%synergy
Simic Sky Swallower
38%inclusion53 decks140 decks
34%synergy
Sword Coast Serpent
37%inclusion52 decks140 decks
35%synergy
Shipbreaker Kraken
37%inclusion52 decks140 decks
34%synergy
Brinelin, the Moon Kraken
36%inclusion50 decks140 decks
32%synergy
Birds of Paradise
34%inclusion48 decks140 decks
6%synergy
Reservoir Kraken
32%inclusion45 decks140 decks
31%synergy
Trench Behemoth
31%inclusion44 decks140 decks
29%synergy
Reef Worm
31%inclusion43 decks140 decks
27%synergy
Murkfiend Liege
30%inclusion42 decks140 decks
16%synergy
Spark Double
30%inclusion42 decks140 decks
20%synergy
Monstrosity of the Lake
29%inclusion41 decks140 decks
27%synergy
Lorthos, the Tidemaker
29%inclusion40 decks140 decks
25%synergy
Sakura-Tribe Elder
29%inclusion40 decks140 decks
9%synergy
Tatyova, Benthic Druid
29%inclusion40 decks140 decks
-2%synergy
Charix, the Raging Isle
28%inclusion39 decks140 decks
24%synergy
Breaching Leviathan
27%inclusion38 decks140 decks
25%synergy
The Watcher in the Water
27%inclusion38 decks140 decks
26%synergy
Llanowar Elves
25%inclusion35 decks140 decks
-3%synergy
Cryptic Serpent
25%inclusion35 decks140 decks
25%synergy
Benthic Anomaly
22%inclusion24 decks107 decks
20%synergy
Scrapdiver Serpent
21%inclusion30 decks140 decks
21%synergy
Sakashima of a Thousand Faces
21%inclusion30 decks140 decks
16%synergy
Octomancer
21%inclusion20 decks97 decks
16%synergy
Mesmerizing Benthid
20%inclusion28 decks140 decks
19%synergy
Starwinder
20%inclusion6 decks30 decks
13%synergy
Elvish Mystic
19%inclusion26 decks140 decks
-5%synergy
Sakashima the Impostor
19%inclusion26 decks140 decks
16%synergy
Harbor Serpent
18%inclusion25 decks140 decks
18%synergy
Chameleon, Master of Disguise
18%inclusion5 decks28 decks
15%synergy
Tolarian Kraken
17%inclusion24 decks140 decks
16%synergy
Archetype of Imagination
17%inclusion24 decks140 decks
13%synergy
Verazol, the Split Current
17%inclusion24 decks140 decks
17%synergy
Esix, Fractal Bloom
16%inclusion23 decks140 decks
13%synergy
Enduring Vitality
16%inclusion14 decks89 decks
8%synergy
Craterhoof Behemoth
16%inclusion22 decks140 decks
6%synergy
Garruk's Packleader
15%inclusion21 decks140 decks
13%synergy
Coiling Oracle
15%inclusion21 decks140 decks
2%synergy
Sea-Dasher Octopus
14%inclusion20 decks140 decks
12%synergy
Elder Deep-Fiend
14%inclusion20 decks140 decks
12%synergy
Tolarian Terror
14%inclusion20 decks140 decks
14%synergy
Nimbus Swimmer
14%inclusion20 decks140 decks
13%synergy
Roaming Throne
13%inclusion18 decks140 decks
5%synergy
Instants
Negate
46%inclusion64 decks140 decks
20%synergy
Return of the Wildspeaker
37%inclusion52 decks140 decks
27%synergy
Simic Charm
36%inclusion51 decks140 decks
29%synergy
Double Major
33%inclusion46 decks140 decks
24%synergy
Heroic Intervention
31%inclusion43 decks140 decks
0%synergy
Arcane Denial
29%inclusion40 decks140 decks
6%synergy
Krosan Grip
26%inclusion37 decks140 decks
19%synergy
Planar Genesis
24%inclusion26 decks107 decks
13%synergy
Engulf the Shore
24%inclusion33 decks140 decks
22%synergy
Mana Drain
23%inclusion32 decks140 decks
7%synergy
Second Harvest
22%inclusion31 decks140 decks
16%synergy
Pongify
21%inclusion30 decks140 decks
-4%synergy
Return to Nature
19%inclusion27 decks140 decks
14%synergy
Harrow
19%inclusion26 decks140 decks
7%synergy
Rapid Hybridization
16%inclusion22 decks140 decks
-11%synergy
Eureka Moment
15%inclusion21 decks140 decks
4%synergy
An Offer You Can't Refuse
15%inclusion21 decks140 decks
-8%synergy
Brainstorm
14%inclusion20 decks140 decks
0%synergy
Aetherize
14%inclusion20 decks140 decks
2%synergy
Plasm Capture
14%inclusion19 decks140 decks
10%synergy
Nature's Claim
11%inclusion16 decks140 decks
2%synergy
Reality Shift
11%inclusion15 decks140 decks
-4%synergy
Swan Song
11%inclusion15 decks140 decks
-9%synergy
Archdruid's Charm
7.9%inclusion11 decks139 decks
2%synergy
Snakeskin Veil
7.9%inclusion11 decks140 decks
2%synergy
Sink into Stupor
7.3%inclusion8 decks109 decks
-4%synergy
Decisive Denial
7.1%inclusion10 decks140 decks
2%synergy
Entish Restoration
7.1%inclusion10 decks140 decks
-2%synergy
High Tide
7.1%inclusion10 decks140 decks
5%synergy
Pact of Negation
6.4%inclusion9 decks140 decks
-1%synergy
Magic Damper
6.3%inclusion2 decks32 decks
5%synergy
Stubborn Denial
5.7%inclusion8 decks140 decks
3%synergy
Mystic Reflection
5.7%inclusion8 decks140 decks
3%synergy
Tamiyo's Safekeeping
5.7%inclusion8 decks140 decks
0%synergy
Voidslime
5.7%inclusion8 decks140 decks
1%synergy
Tyvar's Stand
5.0%inclusion7 decks140 decks
2%synergy
Force of Negation
5.0%inclusion7 decks140 decks
-4%synergy
Sorceries
Farseek
50%inclusion70 decks140 decks
25%synergy
Nature's Lore
50%inclusion70 decks140 decks
19%synergy
Irenicus's Vile Duplication
39%inclusion54 decks140 decks
32%synergy
Three Visits
36%inclusion51 decks140 decks
13%synergy
Urban Evolution
32%inclusion45 decks140 decks
23%synergy
Explore
31%inclusion43 decks140 decks
10%synergy
Skyshroud Claim
29%inclusion40 decks140 decks
19%synergy
Crush of Tentacles
22%inclusion31 decks140 decks
21%synergy
Overwhelming Stampede
19%inclusion27 decks140 decks
7%synergy
Rite of Replication
16%inclusion23 decks140 decks
9%synergy
Last March of the Ents
15%inclusion21 decks140 decks
11%synergy
Quantum Misalignment
14%inclusion20 decks140 decks
11%synergy
Migration Path
13%inclusion18 decks140 decks
10%synergy
Search for Tomorrow
12%inclusion17 decks140 decks
8%synergy
Harmonize
11%inclusion16 decks140 decks
6%synergy
Rishkar's Expertise
10%inclusion14 decks140 decks
2%synergy
Ponder
9.3%inclusion13 decks140 decks
2%synergy
Shamanic Revelation
9.3%inclusion13 decks140 decks
4%synergy
Bala Ged Recovery
7.9%inclusion11 decks140 decks
-2%synergy
Preposterous Proportions
7.7%inclusion5 decks65 decks
6%synergy
Unexpected Results
7.1%inclusion10 decks140 decks
6%synergy
Curse of the Swine
7.1%inclusion10 decks140 decks
-4%synergy
Explosive Vegetation
7.1%inclusion10 decks140 decks
1%synergy
Doppelgang
7.1%inclusion10 decks140 decks
1%synergy
Broken Bond
5.7%inclusion8 decks140 decks
1%synergy
Nature's Rhythm
5.7%inclusion2 decks35 decks
0%synergy
Sea Gate Restoration
5.0%inclusion7 decks140 decks
0%synergy
Spitting Image
5.0%inclusion7 decks140 decks
3%synergy
Utility Artifacts
Swiftfoot Boots
42%inclusion59 decks140 decks
17%synergy
Helm of the Host
31%inclusion43 decks140 decks
25%synergy
Kefnet's Monument
30%inclusion42 decks140 decks
29%synergy
Lightning Greaves
24%inclusion34 decks140 decks
3%synergy
Combine Chrysalis
16%inclusion23 decks140 decks
12%synergy
Sapphire Medallion
15%inclusion21 decks140 decks
12%synergy
The Great Henge
11%inclusion15 decks140 decks
2%synergy
Monster Manual
11%inclusion15 decks140 decks
9%synergy
Urza's Incubator
10%inclusion14 decks140 decks
9%synergy
Emerald Medallion
10%inclusion14 decks140 decks
7%synergy
Mirror Box
9.3%inclusion13 decks140 decks
6%synergy
Herald's Horn
7.9%inclusion11 decks140 decks
4%synergy
Bident of Thassa
7.9%inclusion11 decks140 decks
1%synergy
Coat of Arms
6.4%inclusion9 decks140 decks
5%synergy
Rhonas's Monument
6.4%inclusion9 decks140 decks
5%synergy
Idol of Oblivion
6.4%inclusion9 decks140 decks
3%synergy
Quicksilver Amulet
5.0%inclusion7 decks140 decks
4%synergy
Enchantments
Garruk's Uprising
44%inclusion62 decks140 decks
28%synergy
Parallel Lives
41%inclusion57 decks140 decks
35%synergy
Tribute to the World Tree
39%inclusion55 decks140 decks
33%synergy
Quest for Ula's Temple
35%inclusion49 decks140 decks
32%synergy
Ominous Seas
34%inclusion48 decks140 decks
30%synergy
Doubling Season
26%inclusion36 decks140 decks
16%synergy
Kiora Bests the Sea God
22%inclusion31 decks140 decks
20%synergy
Kindred Discovery
21%inclusion29 decks140 decks
11%synergy
Impostor Syndrome
18%inclusion5 decks28 decks
16%synergy
Mystic Remora
15%inclusion21 decks140 decks
0%synergy
Khalni Heart Expedition
12%inclusion17 decks140 decks
8%synergy
Unnatural Growth
11%inclusion15 decks140 decks
7%synergy
Utopia Sprawl
10%inclusion14 decks140 decks
3%synergy
Moonlit Meditation
10%inclusion3 decks30 decks
9%synergy
Exploration
8.6%inclusion12 decks140 decks
-5%synergy
Beastmaster Ascension
8.6%inclusion12 decks140 decks
5%synergy
Sylvan Library
8.6%inclusion12 decks140 decks
-1%synergy
Levitation
7.9%inclusion11 decks140 decks
7%synergy
Up the Beanstalk
7.1%inclusion10 decks140 decks
3%synergy
Omniscience
7.1%inclusion10 decks140 decks
2%synergy
Primal Vigor
7.1%inclusion10 decks140 decks
4%synergy
Bounty of the Luxa
7.1%inclusion10 decks140 decks
6%synergy
Wilderness Reclamation
6.4%inclusion9 decks140 decks
-3%synergy
Wild Growth
6.4%inclusion9 decks140 decks
-2%synergy
Reflections of Littjara
6.4%inclusion9 decks140 decks
-1%synergy
Paradox Haze
6.4%inclusion9 decks140 decks
6%synergy
Propaganda
6.4%inclusion9 decks140 decks
0%synergy
Extravagant Replication
5.7%inclusion8 decks140 decks
3%synergy
Defense of the Heart
5.7%inclusion8 decks140 decks
3%synergy
Cryptolith Rite
5.0%inclusion7 decks140 decks
2%synergy
Verity Circle
5.0%inclusion7 decks140 decks
4%synergy
Primal Empathy
5.0%inclusion7 decks140 decks
3%synergy
Burgeoning
5.0%inclusion7 decks140 decks
-2%synergy
Asceticism
5.0%inclusion7 decks140 decks
2%synergy
Growing Rites of Itlimoc
5.0%inclusion7 decks140 decks
-1%synergy
Battles
Invasion of Segovia
11%inclusion16 decks140 decks
11%synergy
Planeswalkers
Kiora, the Crashing Wave
28%inclusion39 decks140 decks
25%synergy
Kiora, Master of the Depths
8.6%inclusion12 decks140 decks
6%synergy
Kiora, Behemoth Beckoner
8.6%inclusion12 decks140 decks
2%synergy
Oko, Thief of Crowns
7.1%inclusion10 decks140 decks
0%synergy
Utility Lands
Reliquary Tower
67%inclusion94 decks140 decks
17%synergy
Mosswort Bridge
33%inclusion46 decks140 decks
16%synergy
Temple of the False God
26%inclusion37 decks140 decks
11%synergy
Evendo, Waking Haven
19%inclusion6 decks31 decks
14%synergy
Yavimaya, Cradle of Growth
19%inclusion27 decks140 decks
-3%synergy
Mystic Sanctuary
16%inclusion23 decks140 decks
4%synergy
Boseiju, Who Endures
16%inclusion23 decks140 decks
-6%synergy
Rogue's Passage
16%inclusion22 decks140 decks
-6%synergy
Mistrise Village
14%inclusion5 decks37 decks
3%synergy
Coral Atoll
11%inclusion16 decks140 decks
9%synergy
Dark Depths
11%inclusion16 decks140 decks
5%synergy
Castle Vantress
10%inclusion14 decks140 decks
3%synergy
Castle Garenbrig
10%inclusion14 decks140 decks
5%synergy
Three Tree City
10%inclusion10 decks100 decks
5%synergy
Command Beacon
9.3%inclusion13 decks140 decks
5%synergy
Otawara, Soaring City
9.3%inclusion13 decks140 decks
-10%synergy
Alchemist's Refuge
7.1%inclusion10 decks140 decks
-10%synergy
Lumbering Falls
7.1%inclusion10 decks140 decks
0%synergy
Restless Vinestalk
6.4%inclusion9 decks140 decks
1%synergy
Jungle Basin
6.4%inclusion9 decks140 decks
4%synergy
Bonders' Enclave
5.7%inclusion8 decks140 decks
4%synergy
Halimar Depths
5.0%inclusion7 decks140 decks
2%synergy
Thespian's Stage
5.0%inclusion7 decks140 decks
-2%synergy
Mana Artifacts
Sol Ring
92%inclusion129 decks140 decks
12%synergy
Arcane Signet
79%inclusion111 decks140 decks
16%synergy
Simic Signet
48%inclusion67 decks140 decks
16%synergy
Thought Vessel
26%inclusion37 decks140 decks
6%synergy
Talisman of Curiosity
21%inclusion29 decks140 decks
-1%synergy
Commander's Sphere
14%inclusion19 decks140 decks
6%synergy
Decanter of Endless Water
9.3%inclusion13 decks140 decks
4%synergy
Thran Dynamo
9.3%inclusion13 decks140 decks
6%synergy
Mind Stone
5.0%inclusion7 decks140 decks
1%synergy
Lands
Island
89%inclusion125 decks140 decks
-6%synergy
Forest
89%inclusion125 decks140 decks
-6%synergy
Command Tower
88%inclusion123 decks140 decks
3%synergy
Simic Growth Chamber
64%inclusion90 decks140 decks
16%synergy
Hinterland Harbor
64%inclusion90 decks140 decks
5%synergy
Temple of Mystery
49%inclusion68 decks140 decks
10%synergy
Dreamroot Cascade
48%inclusion67 decks140 decks
6%synergy
Rejuvenating Springs
46%inclusion65 decks140 decks
3%synergy
Breeding Pool
43%inclusion60 decks140 decks
-3%synergy
Flooded Grove
35%inclusion49 decks140 decks
-6%synergy
Thornwood Falls
35%inclusion49 decks140 decks
17%synergy
Barkchannel Pathway
34%inclusion47 decks140 decks
13%synergy
Vineglimmer Snarl
30%inclusion42 decks140 decks
-8%synergy
Yavimaya Coast
29%inclusion41 decks140 decks
-23%synergy
Tangled Islet
29%inclusion41 decks140 decks
13%synergy
Myriad Landscape
29%inclusion40 decks140 decks
7%synergy
Willowrush Verge
28%inclusion12 decks43 decks
11%synergy
Evolving Wilds
27%inclusion38 decks140 decks
2%synergy
Rimewood Falls
21%inclusion30 decks140 decks
12%synergy
Misty Rainforest
21%inclusion29 decks140 decks
-11%synergy
Exotic Orchard
17%inclusion24 decks140 decks
-7%synergy
Terramorphic Expanse
17%inclusion24 decks140 decks
-3%synergy
Snow-Covered Forest
14%inclusion20 decks140 decks
8%synergy
Tropical Island
14%inclusion20 decks140 decks
0%synergy
Snow-Covered Island
14%inclusion19 decks140 decks
7%synergy
Waterlogged Grove
13%inclusion18 decks140 decks
-8%synergy
Path of Ancestry
12%inclusion17 decks140 decks
-5%synergy
Woodland Stream
12%inclusion17 decks140 decks
7%synergy
Hedge Maze
11%inclusion16 decks140 decks
-8%synergy
Simic Guildgate
11%inclusion16 decks140 decks
1%synergy
Overflowing Basin
11%inclusion14 decks131 decks
-9%synergy
Botanical Sanctum
10%inclusion14 decks140 decks
-3%synergy
Blighted Woodland
8.6%inclusion12 decks140 decks
1%synergy
Lush Oasis
8.4%inclusion10 decks119 decks
2%synergy
Bala Ged Recovery
7.9%inclusion11 decks140 decks
-2%synergy
Sink into Stupor
7.3%inclusion8 decks109 decks
-4%synergy
Littjara Mirrorlake
6.4%inclusion9 decks140 decks
3%synergy
Cavern of Souls
5.7%inclusion8 decks140 decks
0%synergy
Glasspool Mimic
5.7%inclusion8 decks140 decks
1%synergy
Fabled Passage
5.0%inclusion7 decks140 decks
-10%synergy
Sea Gate Restoration
5.0%inclusion7 decks140 decks
0%synergy
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