Karumonix, the Rat King (Commander) - Expensive Optimized

Karumonix, the Rat King
Rank #412
9decks
As CommanderAs CardAverage DeckDecks
Bracket
All1234
5
Budget
Any$$$$
Jeremy Rowe
Mar 20, 2026
Jeremy Rowe
Building Rat Typal With Marrow-Gnawer
These Rats will do a lot more than pull your hair. Let's see what Marrow-Gnawer can do leading a swarm of Rats in Commander.
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Instants
Sorceries
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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Swarmyard
89%inclusion8 decks9 decks
83%synergy
Marrow-Gnawer
78%inclusion7 decks9 decks
74%synergy
Piper of the Swarm
78%inclusion7 decks9 decks
71%synergy
Ichor Rats
67%inclusion6 decks9 decks
64%synergy
Blightbelly Rat
67%inclusion6 decks9 decks
63%synergy
Ashcoat of the Shadow Swarm
67%inclusion6 decks9 decks
63%synergy
Thrumming Stone
67%inclusion6 decks9 decks
63%synergy
Phyresis Outbreak
56%inclusion5 decks9 decks
54%synergy
Necrogen Communion
56%inclusion5 decks9 decks
54%synergy
Vraska's Fall
56%inclusion5 decks9 decks
52%synergy
Top Cards
Dark Ritual
100%inclusion9 decks9 decks
33%synergy
Deadly Rollick
56%inclusion5 decks9 decks
30%synergy
Cabal Ritual
56%inclusion5 decks9 decks
37%synergy
Culling the Weak
56%inclusion5 decks9 decks
37%synergy
Jet Medallion
56%inclusion5 decks9 decks
-6%synergy
Drown in Ichor
56%inclusion5 decks9 decks
52%synergy
Rat Colony
56%inclusion5 decks9 decks
50%synergy
Ogre Slumlord
44%inclusion4 decks9 decks
35%synergy
Ayara, First of Locthwain
44%inclusion4 decks9 decks
19%synergy
Infectious Inquiry
44%inclusion4 decks9 decks
42%synergy
Game Changers
Imperial Seal
100%inclusion9 decks9 decks
93%synergy
Demonic Tutor
100%inclusion9 decks9 decks
73%synergy
Vampiric Tutor
100%inclusion9 decks9 decks
79%synergy
Chrome Mox
78%inclusion7 decks9 decks
72%synergy
Mox Diamond
78%inclusion7 decks9 decks
74%synergy
Ancient Tomb
67%inclusion6 decks9 decks
55%synergy
Mana Vault
67%inclusion6 decks9 decks
60%synergy
Bolas's Citadel
56%inclusion5 decks9 decks
28%synergy
The One Ring
56%inclusion5 decks9 decks
46%synergy
Ad Nauseam
33%inclusion3 decks9 decks
30%synergy
Creatures
Ratcatcher
44%inclusion4 decks9 decks
41%synergy
Gnat Miser
44%inclusion4 decks9 decks
42%synergy
Rancid Rats
44%inclusion4 decks9 decks
42%synergy
Lord Skitter, Sewer King
44%inclusion4 decks9 decks
37%synergy
Crypt Rats
33%inclusion3 decks9 decks
29%synergy
Ruthless Radrat
33%inclusion3 decks9 decks
33%synergy
Lord Skitter's Butcher
33%inclusion3 decks9 decks
30%synergy
Pack Rat
33%inclusion3 decks9 decks
28%synergy
Locust Miser
33%inclusion3 decks9 decks
32%synergy
Wave of Rats
33%inclusion3 decks9 decks
32%synergy
Nashi, Moon Sage's Scion
33%inclusion3 decks9 decks
30%synergy
Relentless Rats
22%inclusion2 decks9 decks
21%synergy
Opposition Agent
22%inclusion2 decks9 decks
13%synergy
Crashing Drawbridge
22%inclusion2 decks9 decks
20%synergy
Tangled Colony
22%inclusion2 decks9 decks
19%synergy
Throat Slitter
22%inclusion2 decks9 decks
21%synergy
Chittering Skitterling
22%inclusion2 decks9 decks
21%synergy
Chittering Witch
22%inclusion2 decks9 decks
18%synergy
Voracious Vermin
22%inclusion2 decks9 decks
20%synergy
Nezumi Prowler
22%inclusion2 decks9 decks
21%synergy
Pestilence Rats
22%inclusion2 decks9 decks
20%synergy
Septic Rats
22%inclusion2 decks9 decks
21%synergy
Typhoid Rats
22%inclusion2 decks9 decks
19%synergy
Orcish Bowmasters
22%inclusion2 decks9 decks
9%synergy
Dauthi Voidwalker
22%inclusion2 decks9 decks
7%synergy
Rat King, Pale Piper
20%inclusion1 decks5 decks
16%synergy
Bog Rats
11%inclusion1 decks9 decks
11%synergy
Hoarding Broodlord
11%inclusion1 decks9 decks
7%synergy
Burglar Rat
11%inclusion1 decks9 decks
1%synergy
Ravenous Rats
11%inclusion1 decks9 decks
10%synergy
Blood Artist
11%inclusion1 decks9 decks
-21%synergy
Sheoldred, the Apocalypse
11%inclusion1 decks9 decks
-4%synergy
Roaming Throne
11%inclusion1 decks9 decks
8%synergy
Defiler of Flesh
11%inclusion1 decks9 decks
8%synergy
Nezumi Bladeblesser
11%inclusion1 decks9 decks
11%synergy
Ophiomancer
11%inclusion1 decks9 decks
-6%synergy
Ink-Eyes, Servant of Oni
11%inclusion1 decks9 decks
8%synergy
Zodiac Rat
11%inclusion1 decks9 decks
11%synergy
Myr Convert
11%inclusion1 decks9 decks
10%synergy
Boggart Trawler
11%inclusion1 decks9 decks
2%synergy
Zulaport Cutthroat
11%inclusion1 decks9 decks
-12%synergy
Persistent Marshstalker
11%inclusion1 decks9 decks
8%synergy
Mogis's Marauder
11%inclusion1 decks9 decks
10%synergy
Swarm of Rats
11%inclusion1 decks9 decks
9%synergy
Bilious Skulldweller
11%inclusion1 decks9 decks
10%synergy
Valley Rotcaller
11%inclusion1 decks9 decks
8%synergy
Twisted Sewer-Witch
11%inclusion1 decks9 decks
10%synergy
Ossuary Rats
11%inclusion1 decks9 decks
11%synergy
Crypt Ghast
11%inclusion1 decks9 decks
-36%synergy
Changeling Outcast
11%inclusion1 decks9 decks
6%synergy
Instants
Whisper of the Dross
33%inclusion3 decks9 decks
31%synergy
Village Rites
33%inclusion3 decks9 decks
8%synergy
Go for the Throat
22%inclusion2 decks9 decks
-0%synergy
Corrupted Conviction
22%inclusion2 decks9 decks
10%synergy
Force of Despair
11%inclusion1 decks9 decks
4%synergy
Entomb
11%inclusion1 decks9 decks
-2%synergy
Imp's Mischief
11%inclusion1 decks9 decks
-14%synergy
Snuff Out
11%inclusion1 decks9 decks
-3%synergy
Songs of the Damned
11%inclusion1 decks9 decks
5%synergy
Deadly Dispute
11%inclusion1 decks9 decks
-16%synergy
Wring Flesh
11%inclusion1 decks9 decks
11%synergy
Defile
11%inclusion1 decks9 decks
-24%synergy
Extinguish the Light
11%inclusion1 decks9 decks
11%synergy
Murder
11%inclusion1 decks9 decks
2%synergy
Infernal Grasp
11%inclusion1 decks9 decks
-14%synergy
Foul-Tongue Shriek
11%inclusion1 decks9 decks
9%synergy
Unseal the Necropolis
11%inclusion1 decks9 decks
10%synergy
Offer Immortality
11%inclusion1 decks9 decks
9%synergy
Saw in Half
11%inclusion1 decks9 decks
2%synergy
Tragic Slip
11%inclusion1 decks9 decks
-8%synergy
Dismember
11%inclusion1 decks9 decks
1%synergy
Sorceries
Grim Tutor
44%inclusion4 decks9 decks
33%synergy
Diabolic Intent
33%inclusion3 decks9 decks
18%synergy
Reanimate
33%inclusion3 decks9 decks
-8%synergy
Kindred Dominance
33%inclusion3 decks9 decks
29%synergy
Revenge of the Rats
22%inclusion2 decks9 decks
19%synergy
Feed the Swarm
22%inclusion2 decks9 decks
-28%synergy
Plague of Vermin
22%inclusion2 decks9 decks
20%synergy
Day of Black Sun
20%inclusion1 decks5 decks
19%synergy
Bloodline Bidding
20%inclusion1 decks5 decks
16%synergy
Strategic Betrayal
13%inclusion1 decks8 decks
12%synergy
Demogorgon's Clutches
11%inclusion1 decks9 decks
11%synergy
Bone Splinters
11%inclusion1 decks9 decks
9%synergy
Diabolic Tutor
11%inclusion1 decks9 decks
-2%synergy
Victimize
11%inclusion1 decks9 decks
-17%synergy
Patriarch's Bidding
11%inclusion1 decks9 decks
7%synergy
Profane Tutor
11%inclusion1 decks9 decks
7%synergy
Forever Young
11%inclusion1 decks9 decks
10%synergy
Feed the Infection
11%inclusion1 decks9 decks
11%synergy
Swarmyard Massacre
11%inclusion1 decks9 decks
9%synergy
Echoing Return
11%inclusion1 decks9 decks
8%synergy
Sinkhole
11%inclusion1 decks9 decks
11%synergy
Read the Bones
11%inclusion1 decks9 decks
-4%synergy
Mutilate
11%inclusion1 decks9 decks
-4%synergy
Night's Whisper
11%inclusion1 decks9 decks
-14%synergy
Caress of Phyrexia
11%inclusion1 decks9 decks
11%synergy
Living Death
11%inclusion1 decks9 decks
1%synergy
Toxic Deluge
11%inclusion1 decks9 decks
-26%synergy
Sign in Blood
11%inclusion1 decks9 decks
-24%synergy
Damnation
11%inclusion1 decks9 decks
-9%synergy
Rise of the Dark Realms
11%inclusion1 decks9 decks
-2%synergy
Crippling Fear
11%inclusion1 decks9 decks
8%synergy
Pact of the Serpent
11%inclusion1 decks9 decks
10%synergy
Secret Salvage
11%inclusion1 decks9 decks
10%synergy
Utility Artifacts
Bontu's Monument
44%inclusion4 decks9 decks
16%synergy
Herald's Horn
33%inclusion3 decks9 decks
28%synergy
Sensei's Divining Top
22%inclusion2 decks9 decks
14%synergy
Contagion Clasp
22%inclusion2 decks9 decks
20%synergy
Aetherflux Reservoir
22%inclusion2 decks9 decks
13%synergy
Vanquisher's Banner
22%inclusion2 decks9 decks
19%synergy
Chronicle of Victory
20%inclusion1 decks5 decks
17%synergy
The Darkness Crystal
13%inclusion1 decks8 decks
-8%synergy
Defense Grid
11%inclusion1 decks9 decks
9%synergy
Cloud Key
11%inclusion1 decks9 decks
9%synergy
Contagion Engine
11%inclusion1 decks9 decks
9%synergy
Ashnod's Altar
11%inclusion1 decks9 decks
-9%synergy
Coat of Arms
11%inclusion1 decks9 decks
9%synergy
Lavaspur Boots
11%inclusion1 decks9 decks
9%synergy
Skullclamp
11%inclusion1 decks9 decks
-11%synergy
Nim Deathmantle
11%inclusion1 decks9 decks
8%synergy
Prosthetic Injector
11%inclusion1 decks9 decks
11%synergy
Banner of Kinship
11%inclusion1 decks9 decks
9%synergy
Door of Destinies
11%inclusion1 decks9 decks
9%synergy
Manascape Refractor
11%inclusion1 decks9 decks
11%synergy
Nihil Spellbomb
11%inclusion1 decks9 decks
10%synergy
Altar of the Brood
11%inclusion1 decks9 decks
9%synergy
Swiftfoot Boots
11%inclusion1 decks9 decks
-20%synergy
Lightning Greaves
11%inclusion1 decks9 decks
-23%synergy
Sword of the Paruns
11%inclusion1 decks9 decks
11%synergy
Thornbite Staff
11%inclusion1 decks9 decks
8%synergy
Enchantments
Animate Dead
33%inclusion3 decks9 decks
16%synergy
Cover of Darkness
33%inclusion3 decks9 decks
30%synergy
Phyrexian Arena
33%inclusion3 decks9 decks
-6%synergy
Black Market
22%inclusion2 decks9 decks
2%synergy
Grave Pact
22%inclusion2 decks9 decks
3%synergy
Phyresis
22%inclusion2 decks9 decks
20%synergy
Black Market Connections
22%inclusion2 decks9 decks
-3%synergy
Waste Not
11%inclusion1 decks9 decks
1%synergy
The Meathook Massacre
11%inclusion1 decks9 decks
-6%synergy
Contamination
11%inclusion1 decks9 decks
8%synergy
Glistening Oil
11%inclusion1 decks9 decks
10%synergy
Haunted One
11%inclusion1 decks9 decks
9%synergy
Tribute to Horobi
11%inclusion1 decks9 decks
10%synergy
Necropotence
11%inclusion1 decks9 decks
-3%synergy
Carnival of Souls
11%inclusion1 decks9 decks
10%synergy
No Mercy
11%inclusion1 decks9 decks
4%synergy
Oversold Cemetery
11%inclusion1 decks9 decks
6%synergy
Bitterblossom
11%inclusion1 decks9 decks
-2%synergy
Bad Moon
11%inclusion1 decks9 decks
8%synergy
Planeswalkers
Vraska, Betrayal's Sting
33%inclusion3 decks9 decks
31%synergy
Karn, the Great Creator
11%inclusion1 decks9 decks
10%synergy
Utility Lands
Urborg, Tomb of Yawgmoth
89%inclusion8 decks9 decks
51%synergy
Cabal Coffers
78%inclusion7 decks9 decks
23%synergy
Phyrexian Tower
67%inclusion6 decks9 decks
40%synergy
Nykthos, Shrine to Nyx
67%inclusion6 decks9 decks
37%synergy
Bojuka Bog
56%inclusion5 decks9 decks
8%synergy
Karn's Bastion
56%inclusion5 decks9 decks
52%synergy
Cabal Stronghold
44%inclusion4 decks9 decks
11%synergy
Mudflat Village
44%inclusion4 decks9 decks
42%synergy
Three Tree City
44%inclusion4 decks9 decks
40%synergy
Reliquary Tower
33%inclusion3 decks9 decks
4%synergy
Urza's Saga
22%inclusion2 decks9 decks
14%synergy
Takenuma, Abandoned Mire
22%inclusion2 decks9 decks
6%synergy
Mishra's Workshop
22%inclusion2 decks9 decks
22%synergy
Castle Locthwain
22%inclusion2 decks9 decks
6%synergy
Strip Mine
22%inclusion2 decks9 decks
19%synergy
Realm of Koh
20%inclusion1 decks5 decks
17%synergy
Westvale Abbey
11%inclusion1 decks9 decks
5%synergy
Witch's Clinic
11%inclusion1 decks9 decks
10%synergy
Mortuary Mire
11%inclusion1 decks9 decks
-2%synergy
Barren Moor
11%inclusion1 decks9 decks
2%synergy
Boseiju, Who Shelters All
11%inclusion1 decks9 decks
10%synergy
Vesuva
11%inclusion1 decks9 decks
8%synergy
Crypt of Agadeem
11%inclusion1 decks9 decks
-0%synergy
Inkmoth Nexus
11%inclusion1 decks9 decks
10%synergy
Mutavault
11%inclusion1 decks9 decks
10%synergy
Witch's Cottage
11%inclusion1 decks9 decks
-13%synergy
Volrath's Stronghold
11%inclusion1 decks9 decks
7%synergy
Emergence Zone
11%inclusion1 decks9 decks
8%synergy
The Dross Pits
11%inclusion1 decks9 decks
10%synergy
Peat Bog
11%inclusion1 decks9 decks
9%synergy
Terrain Generator
11%inclusion1 decks9 decks
9%synergy
Field of the Dead
11%inclusion1 decks9 decks
10%synergy
Lake of the Dead
11%inclusion1 decks9 decks
6%synergy
Dark Depths
11%inclusion1 decks9 decks
11%synergy
Dakmor Salvage
11%inclusion1 decks9 decks
9%synergy
Rogue's Passage
11%inclusion1 decks9 decks
-8%synergy
Mana Artifacts
Sol Ring
89%inclusion8 decks9 decks
4%synergy
Arcane Signet
67%inclusion6 decks9 decks
5%synergy
Lotus Petal
56%inclusion5 decks9 decks
48%synergy
Glistening Sphere
33%inclusion3 decks9 decks
32%synergy
Mox Amber
33%inclusion3 decks9 decks
29%synergy
Caged Sun
11%inclusion1 decks9 decks
1%synergy
Staff of Compleation
11%inclusion1 decks9 decks
9%synergy
Charcoal Diamond
11%inclusion1 decks9 decks
-10%synergy
Grim Monolith
11%inclusion1 decks9 decks
8%synergy
Patchwork Banner
11%inclusion1 decks9 decks
7%synergy
Throne of Eldraine
11%inclusion1 decks9 decks
2%synergy
Basalt Monolith
11%inclusion1 decks9 decks
10%synergy
Thought Vessel
11%inclusion1 decks9 decks
-13%synergy
Skull of Ramos
11%inclusion1 decks9 decks
11%synergy
Phyrexian Atlas
11%inclusion1 decks9 decks
11%synergy
Mox Opal
11%inclusion1 decks9 decks
8%synergy
Lands
Swamp
89%inclusion8 decks9 decks
-7%synergy
Cavern of Souls
56%inclusion5 decks9 decks
49%synergy
Gemstone Caverns
33%inclusion3 decks9 decks
29%synergy
Command Tower
22%inclusion2 decks9 decks
16%synergy
Path of Ancestry
22%inclusion2 decks9 decks
17%synergy
Snow-Covered Swamp
22%inclusion2 decks9 decks
16%synergy
Prismatic Vista
11%inclusion1 decks9 decks
9%synergy
Exotic Orchard
11%inclusion1 decks9 decks
10%synergy
Unclaimed Territory
11%inclusion1 decks9 decks
11%synergy
Verdant Catacombs
11%inclusion1 decks9 decks
8%synergy
Reflecting Pool
11%inclusion1 decks9 decks
11%synergy
Boggart Trawler
11%inclusion1 decks9 decks
2%synergy
Demolition Field
11%inclusion1 decks9 decks
6%synergy
Marsh Flats
11%inclusion1 decks9 decks
7%synergy
Polluted Delta
11%inclusion1 decks9 decks
7%synergy
Bloodstained Mire
11%inclusion1 decks9 decks
7%synergy
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