Koma, Cosmos Serpent

Art by Jesper Ejsing

Commander deckGU

Koma, Cosmos Serpent

Generate infinite squirrels with Earthcraft and Squirrel Nest while leveraging Lifetap and Yavimaya for sustain, using tokens to overwhelm or control the board.

$405.63for all 100 cards at today’s prices
Built Jun 23, 202667 views

Asked for“A Blue/Green dwck that uses the cards Earthcraft,Squirrel Nest for lots of bodies. Yavimaya,Cradle of Growth and Lifetap to be able to gain life often. Song of Dryads, and Imprisoned in the Moon for commander removal. Ground Seal for Graveyard hate. Perplexing Chimera for some clever plays. Moonlit Meditation as a Game Changer with token creation nonsense.”

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Some cards were dropped or normalized during validation because of legality, duplication, or color identity checks.

Deck anatomy

What this list actually runs on: how cheaply it casts things, and whether it has enough ramp, card draw and interaction to keep up at the table. Each block is one card — hover for its name.

Mana curve · 60 nonland cards

7
19
11
7
9
2
5
01234567+
RampCard drawInteractionThreats & synergy

The working parts

Ramp16
Card draw14
Interaction13
↳ board wipes1
Tutors5

Counted from Scryfall’s community card tags, not from the builder’s own labels. A card that does two jobs counts twice, so these add up to more than the deck. The hatched band is a common rule of thumb, not a law — combo decks run leaner, battlecruiser decks heavier.

Colored mana symbols

U 24G 54
39lands · rule of thumb 35–38
3.32average mana value (nonland)
$405.63whole deck, today

The list

Commander

1
Koma, Cosmos Serpent

Koma, Cosmos Serpent

3GGUU

Legendary Creature — Serpent

Chosen commander for the requested strategy.

Ramp

12
Sol Ring

Sol Ring

1

Artifact

Format staple acceleration

Arcane Signet

Arcane Signet

2

Artifact

Efficient color fixing

Cultivate

Cultivate

2G

Sorcery

Essential green ramp and fixing

Kodama's Reach

Kodama's Reach

2G

Sorcery — Arcane

Essential green ramp and fixing

Simic Signet

Simic Signet

2

Artifact

Low cost mana fixing

Talisman of Curiosity

Talisman of Curiosity

2

Artifact

Untapped mana acceleration

Fellwar Stone

Fellwar Stone

2

Artifact

Generic efficient mana rock

Rampant Growth

Rampant Growth

1G

Sorcery

Basic land acceleration

Wayfarer's Bauble

Wayfarer's Bauble

1

Artifact

Colorless land ramp

Nature's Lore

Nature's Lore

1G

Sorcery

Retrieves Forest types to play

Coiling Oracle

Coiling Oracle

GU

Creature — Snake Elf Druid

Value body that ramps or draws

Zendikar Resurgent

Zendikar Resurgent

5GG

Enchantment

Doubles mana and draws cards on creature cast

Card Draw

11
Moonlit Meditation

Moonlit Meditation

2U

Enchantment — Aura

Synergizes with tokens for massive card draw potential

Brainstorm

Brainstorm

U

Instant

Cheap top deck manipulation

Ponder

Ponder

U

Sorcery

Selection and consistency

Preordain

Preordain

U

Sorcery

Top deck filtering

Fact or Fiction

Fact or Fiction

3U

Instant

Excellent card advantage at instant speed

Mulldrifter

Mulldrifter

4U

Creature — Elemental

Value creature with evoke option

Shamanic Revelation

Shamanic Revelation

3GG

Sorcery

Massive draw and lifegain based on tokens

Beast Whisperer

Beast Whisperer

2GG

Creature — Elf Druid

Draws cards for casting creatures

Harmonize

Harmonize

2GG

Sorcery

Pure card draw in green

Growth Spiral

Growth Spiral

GU

Instant

Draws and scales mana simultaneously

Toski, Bearer of Secrets

Toski, Bearer of Secrets

3G

Legendary Creature — Squirrel

Draws cards for combat damage from tokens

Removal

12
Song of the Dryads

Song of the Dryads

2G

Enchantment — Aura

Flexible permanent removal that neutralizes commanders

Imprisoned in the Moon

Imprisoned in the Moon

2U

Enchantment — Aura

Transfroms problematic commanders into lands

Beast Within

Beast Within

2G

Instant

Verschatile single target removal

Reality Shift

Reality Shift

1U

Instant

Efficient exile for creatures

Rapid Hybridization

Rapid Hybridization

U

Instant

Cheap blue creature removal

Pongify

Pongify

U

Instant

Efficient creature destruction

Counterspell

Counterspell

UU

Instant

Universal answer to any spell

Negate

Negate

1U

Instant

Protects the board from noncreature spells

Reclamation Sage

Reclamation Sage

2G

Creature — Elf Shaman

Destroy artifact or enchantment on a body

Kenrith's Transformation

Kenrith's Transformation

1G

Enchantment — Aura

Removes abilities and draws a card

Aetherize

Aetherize

3U

Instant

Defensive mass bounce

Acidic Slime

Acidic Slime

3GG

Creature — Ooze

Deathtouch blocker and removal

Threats/Wincons

14
Squirrel Nest

Squirrel Nest

1GG

Enchantment — Aura

Infinite tokens when paired with Earthcraft

Avenger of Zendikar

Avenger of Zendikar

5GG

Creature — Elemental

Powerful token generator scaled to lands

Scute Swarm

Scute Swarm

2G

Creature — Insect

Rapidly expanding token presence

Myr Battlesphere

Myr Battlesphere

7

Artifact Creature — Myr Construct

Generates multiple bodies and a high-impact attacker

Hornet Queen

Hornet Queen

4GGG

Creature — Insect

Defensive tokens with deathtouch

Biogenic Ooze

Biogenic Ooze

3GG

Creature — Ooze

Token engine that grows the board

Second Harvest

Second Harvest

2GG

Instant

Doubles all existing tokens

Deeproot Pilgrimage

Deeproot Pilgrimage

1U

Enchantment

Tokens for tapping creatures (synergy with Earthcraft)

Overwhelming Stampede

Overwhelming Stampede

3GG

Sorcery

Finisher for a wide board

End-Raze Forerunners

End-Raze Forerunners

5GGG

Creature — Boar

Finisher on a budget Craterhoof alternative

Rampaging Baloths

Rampaging Baloths

4GG

Creature — Beast

Token generation on landfall

Tendershoot Dryad

Tendershoot Dryad

4G

Creature — Dryad

Tokens every upkeep

Master Biomancer

Master Biomancer

2GU

Creature — Elf Wizard

Buffs all incoming tokens

Champion of Lambholt

Champion of Lambholt

1GG

Creature — Human Warrior

Increases board reach by making tokens unblockable

Utility

11
Earthcraft

Earthcraft

1G

Enchantment

Part of the main win condition with Squirrel Nest

Lifetap

Lifetap

UU

Enchantment

Consistent life gain engine with Yavimaya

Ground Seal

Ground Seal

1G

Enchantment

Stops graveyard recursion while drawing a card

Perplexing Chimera

Perplexing Chimera

4U

Enchantment Creature — Chimera

Disruptive trade effect to steal spells

Eternal Witness

Eternal Witness

1GG

Creature — Human Shaman

Recovers combo pieces from graveyard

Seedborn Muse

Seedborn Muse

3GG

Creature — Spirit

Untaps for more activations and control

Swiftfoot Boots

Swiftfoot Boots

2

Artifact — Equipment

Protection for the commander or key creatures

Lightning Greaves

Lightning Greaves

2

Artifact — Equipment

Haste and protection for key pieces

Aesi, Tyrant of Gyre Strait

Aesi, Tyrant of Gyre Strait

4GU

Legendary Creature — Serpent

Landfall draw and extra land drops

Double Major

Double Major

GU

Instant

Copies the commander or combo enablers

Murkfiend Liege

Murkfiend Liege

2GUGUGU

Creature — Horror

Buffs creatures and untaps them regularly

Lands

39
Reliquary Tower

Reliquary Tower

Land

No maximum hand size.

War Room

War Room

Land

Card draw from the mana base.

Rogue's Passage

Rogue's Passage

Land

Makes a creature unblockable.

Temple of the False God

Temple of the False God

Land

Extra mana in the late game.

Command Tower

Command Tower

Land

Produces any color in your identity.

Exotic Orchard

Exotic Orchard

Land

Flexible multicolor fixing.

Path of Ancestry

Path of Ancestry

Land

Color fixing with scry on creature casts.

Myriad Landscape

Myriad Landscape

Land

Ramp from the mana base.

Castle Garenbrig

Castle Garenbrig

Land

Mono-color utility land.

Mystic Sanctuary

Mystic Sanctuary

Land — Island

Recurs an instant or sorcery.

Castle Vantress

Castle Vantress

Land

Mono-color utility land.

Yavimaya Coast

Yavimaya Coast

Land

Nonbasic dual land for color fixing.

Hinterland Harbor

Hinterland Harbor

Land

Nonbasic dual land for color fixing.

Temple of Mystery

Temple of Mystery

Land

Dual land with scry.

Lumbering Falls

Lumbering Falls

Land

Nonbasic dual land for color fixing.

Island

Island 8x

Basic Land — Island

Basic land allocated from mana pip counts.

Forest

Forest 16x

Basic Land — Forest

Basic land allocated from mana pip counts.