Karumonix, the Rat King (Commander) - Expensive Relentless Rats

Karumonix, the Rat King
Rank #407
10decks
As CommanderAs CardAverage DeckDecks
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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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Utility Lands
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Relentless Rats
100%inclusion10 decks10 decks
98%synergy
Marrow-Gnawer
100%inclusion10 decks10 decks
97%synergy
Thrumming Stone
80%inclusion8 decks10 decks
76%synergy
Kindred Dominance
70%inclusion7 decks10 decks
65%synergy
Swarmyard
70%inclusion7 decks10 decks
64%synergy
Ashcoat of the Shadow Swarm
60%inclusion6 decks10 decks
56%synergy
Patriarch's Bidding
60%inclusion6 decks10 decks
56%synergy
Herald's Horn
60%inclusion6 decks10 decks
54%synergy
Pack Rat
60%inclusion6 decks10 decks
54%synergy
Piper of the Swarm
60%inclusion6 decks10 decks
53%synergy
Top Cards
Jet Medallion
100%inclusion10 decks10 decks
38%synergy
Dark Ritual
90%inclusion9 decks10 decks
23%synergy
Phyrexian Arena
70%inclusion7 decks10 decks
31%synergy
Ogre Slumlord
60%inclusion6 decks10 decks
50%synergy
Bontu's Monument
60%inclusion6 decks10 decks
32%synergy
Echoing Return
50%inclusion5 decks10 decks
47%synergy
Ink-Eyes, Servant of Oni
50%inclusion5 decks10 decks
47%synergy
Vanquisher's Banner
50%inclusion5 decks10 decks
46%synergy
Crypt Ghast
50%inclusion5 decks10 decks
3%synergy
Ratcatcher
50%inclusion5 decks10 decks
47%synergy
Game Changers
Demonic Tutor
80%inclusion8 decks10 decks
53%synergy
Vampiric Tutor
80%inclusion8 decks10 decks
59%synergy
Imperial Seal
40%inclusion4 decks10 decks
33%synergy
Ancient Tomb
40%inclusion4 decks10 decks
28%synergy
Mana Vault
30%inclusion3 decks10 decks
23%synergy
Opposition Agent
10%inclusion1 decks10 decks
1%synergy
Bolas's Citadel
10%inclusion1 decks10 decks
-18%synergy
The One Ring
10%inclusion1 decks10 decks
1%synergy
Necropotence
10%inclusion1 decks10 decks
-4%synergy
Orcish Bowmasters
10%inclusion1 decks10 decks
-3%synergy
Creatures
Lord Skitter, Sewer King
40%inclusion4 decks10 decks
32%synergy
Blightbelly Rat
30%inclusion3 decks10 decks
27%synergy
Ichor Rats
30%inclusion3 decks10 decks
27%synergy
Refurbished Familiar
20%inclusion2 decks10 decks
18%synergy
Crypt Rats
20%inclusion2 decks10 decks
16%synergy
Roaming Throne
20%inclusion2 decks10 decks
17%synergy
Ayara, First of Locthwain
20%inclusion2 decks10 decks
-5%synergy
Nirkana Revenant
20%inclusion2 decks10 decks
10%synergy
Swarm of Rats
20%inclusion2 decks10 decks
18%synergy
Voracious Vermin
20%inclusion2 decks10 decks
17%synergy
Septic Rats
20%inclusion2 decks10 decks
18%synergy
Gnat Miser
20%inclusion2 decks10 decks
17%synergy
Typhoid Rats
20%inclusion2 decks10 decks
16%synergy
Patron of the Nezumi
10%inclusion1 decks10 decks
9%synergy
Chittering Rats
10%inclusion1 decks10 decks
9%synergy
Nezumi Graverobber
10%inclusion1 decks10 decks
9%synergy
Burglar Rat
10%inclusion1 decks10 decks
-0%synergy
Ravenous Rats
10%inclusion1 decks10 decks
8%synergy
Blood Artist
10%inclusion1 decks10 decks
-22%synergy
Hooded Blightfang
10%inclusion1 decks10 decks
10%synergy
Sheoldred, the Apocalypse
10%inclusion1 decks10 decks
-5%synergy
Tangled Colony
10%inclusion1 decks10 decks
7%synergy
Filth
10%inclusion1 decks10 decks
8%synergy
Lord Skitter's Butcher
10%inclusion1 decks10 decks
7%synergy
Species Specialist
10%inclusion1 decks10 decks
7%synergy
Adaptive Automaton
10%inclusion1 decks10 decks
9%synergy
Throat Slitter
10%inclusion1 decks10 decks
8%synergy
Canoptek Wraith
10%inclusion1 decks10 decks
8%synergy
Locust Miser
10%inclusion1 decks10 decks
9%synergy
Persistent Marshstalker
10%inclusion1 decks10 decks
7%synergy
Kozilek, Butcher of Truth
10%inclusion1 decks10 decks
9%synergy
Chittering Skitterling
10%inclusion1 decks10 decks
9%synergy
Burnished Hart
10%inclusion1 decks10 decks
3%synergy
Chittering Witch
10%inclusion1 decks10 decks
6%synergy
Valley Rotcaller
10%inclusion1 decks10 decks
7%synergy
Yawgmoth, Thran Physician
10%inclusion1 decks10 decks
0%synergy
Pitiless Plunderer
10%inclusion1 decks10 decks
-10%synergy
Butcher of Malakir
10%inclusion1 decks10 decks
4%synergy
Drainpipe Vermin
10%inclusion1 decks10 decks
9%synergy
Ancient Cellarspawn
10%inclusion1 decks10 decks
8%synergy
Orc Sureshot
10%inclusion1 decks10 decks
9%synergy
K'rrik, Son of Yawgmoth
10%inclusion1 decks10 decks
-9%synergy
Wave of Rats
10%inclusion1 decks10 decks
8%synergy
Nashi, Moon Sage's Scion
10%inclusion1 decks10 decks
6%synergy
Skithiryx, the Blight Dragon
10%inclusion1 decks10 decks
9%synergy
Rancid Rats
10%inclusion1 decks10 decks
8%synergy
Stronghold Rats
10%inclusion1 decks10 decks
7%synergy
Archetype of Finality
10%inclusion1 decks10 decks
9%synergy
Rat Colony
10%inclusion1 decks10 decks
4%synergy
Ruin Rat
10%inclusion1 decks10 decks
9%synergy
Instants
Archenemy's Charm
50%inclusion1 decks2 decks
41%synergy
Deadly Rollick
40%inclusion4 decks10 decks
15%synergy
Snuff Out
30%inclusion3 decks10 decks
16%synergy
Village Rites
30%inclusion3 decks10 decks
4%synergy
Defile
30%inclusion3 decks10 decks
-5%synergy
Whisper of the Dross
20%inclusion2 decks10 decks
17%synergy
Vraska's Fall
20%inclusion2 decks10 decks
17%synergy
Heartless Act
20%inclusion2 decks10 decks
18%synergy
Rat Out
20%inclusion2 decks10 decks
19%synergy
Withering Boon
20%inclusion2 decks10 decks
16%synergy
Breathe Your Last
20%inclusion2 decks10 decks
18%synergy
Hagra Mauling
10%inclusion1 decks10 decks
6%synergy
Hero's Downfall
10%inclusion1 decks10 decks
3%synergy
Cut Down
10%inclusion1 decks10 decks
6%synergy
Sheoldred's Edict
10%inclusion1 decks10 decks
-5%synergy
Scour from Existence
10%inclusion1 decks10 decks
10%synergy
Entomb
10%inclusion1 decks10 decks
-3%synergy
Go for the Throat
10%inclusion1 decks10 decks
-13%synergy
Imp's Mischief
10%inclusion1 decks10 decks
-15%synergy
Anoint with Affliction
10%inclusion1 decks10 decks
9%synergy
Grasp of Darkness
10%inclusion1 decks10 decks
8%synergy
Cabal Ritual
10%inclusion1 decks10 decks
-9%synergy
Soul Shatter
10%inclusion1 decks10 decks
-2%synergy
Culling the Weak
10%inclusion1 decks10 decks
-8%synergy
Tainted Strike
10%inclusion1 decks10 decks
7%synergy
Foul-Tongue Shriek
10%inclusion1 decks10 decks
8%synergy
Terror
10%inclusion1 decks10 decks
9%synergy
Warping Wail
10%inclusion1 decks10 decks
10%synergy
Cast Down
10%inclusion1 decks10 decks
9%synergy
Victim of Night
10%inclusion1 decks10 decks
8%synergy
Dismember
10%inclusion1 decks10 decks
-0%synergy
Withering Torment
10%inclusion1 decks10 decks
-21%synergy
Sorceries
Damnation
40%inclusion4 decks10 decks
20%synergy
Diabolic Intent
30%inclusion3 decks10 decks
15%synergy
Feed the Swarm
30%inclusion3 decks10 decks
-20%synergy
Grim Tutor
30%inclusion3 decks10 decks
19%synergy
Haunting Voyage
20%inclusion2 decks10 decks
19%synergy
Infectious Inquiry
20%inclusion2 decks10 decks
17%synergy
Living Death
20%inclusion2 decks10 decks
10%synergy
Reanimate
20%inclusion2 decks10 decks
-21%synergy
Sign in Blood
20%inclusion2 decks10 decks
-15%synergy
Crippling Fear
20%inclusion2 decks10 decks
17%synergy
Diabolic Tutor
10%inclusion1 decks10 decks
-4%synergy
Plague Wind
10%inclusion1 decks10 decks
9%synergy
Profane Tutor
10%inclusion1 decks10 decks
6%synergy
Season of Loss
10%inclusion1 decks10 decks
8%synergy
Final Act
10%inclusion1 decks10 decks
8%synergy
Dread Return
10%inclusion1 decks10 decks
-2%synergy
Bubbling Muck
10%inclusion1 decks10 decks
-6%synergy
Phyresis Outbreak
10%inclusion1 decks10 decks
8%synergy
Swarmyard Massacre
10%inclusion1 decks10 decks
8%synergy
Demonic Collusion
10%inclusion1 decks10 decks
10%synergy
Agadeem's Awakening
10%inclusion1 decks10 decks
2%synergy
Infernal Tutor
10%inclusion1 decks10 decks
10%synergy
Mutilate
10%inclusion1 decks10 decks
-6%synergy
Night's Whisper
10%inclusion1 decks10 decks
-15%synergy
Exsanguinate
10%inclusion1 decks10 decks
-15%synergy
In Garruk's Wake
10%inclusion1 decks10 decks
6%synergy
Toxic Deluge
10%inclusion1 decks10 decks
-27%synergy
Gruesome Fate
10%inclusion1 decks10 decks
8%synergy
Cruel Tutor
10%inclusion1 decks10 decks
9%synergy
Rise of the Dark Realms
10%inclusion1 decks10 decks
-3%synergy
Plague of Vermin
10%inclusion1 decks10 decks
8%synergy
Pact of the Serpent
10%inclusion1 decks10 decks
8%synergy
Secret Salvage
10%inclusion1 decks10 decks
9%synergy
Utility Artifacts
Chronicle of Victory
50%inclusion1 decks2 decks
47%synergy
Coat of Arms
40%inclusion4 decks10 decks
37%synergy
Whip of Erebos
30%inclusion3 decks10 decks
19%synergy
Skullclamp
30%inclusion3 decks10 decks
8%synergy
Lightning Greaves
30%inclusion3 decks10 decks
-4%synergy
Chimil, the Inner Sun
20%inclusion2 decks10 decks
19%synergy
Phyrexian Altar
20%inclusion2 decks10 decks
6%synergy
Door of Destinies
20%inclusion2 decks10 decks
18%synergy
Banner of Kinship
13%inclusion1 decks8 decks
10%synergy
Sensei's Divining Top
10%inclusion1 decks10 decks
2%synergy
Stone Calendar
10%inclusion1 decks10 decks
10%synergy
Wayfarer's Bauble
10%inclusion1 decks10 decks
-4%synergy
Contagion Engine
10%inclusion1 decks10 decks
8%synergy
The Immortal Sun
10%inclusion1 decks10 decks
9%synergy
Cloudstone Curio
10%inclusion1 decks10 decks
10%synergy
Aetherflux Reservoir
10%inclusion1 decks10 decks
1%synergy
Sword of Hearth and Home
10%inclusion1 decks10 decks
9%synergy
Akroma's Memorial
10%inclusion1 decks10 decks
9%synergy
Maskwood Nexus
10%inclusion1 decks10 decks
9%synergy
Urza's Incubator
10%inclusion1 decks10 decks
8%synergy
Navigation Orb
10%inclusion1 decks10 decks
9%synergy
Swiftfoot Boots
10%inclusion1 decks10 decks
-21%synergy
Sword of the Animist
10%inclusion1 decks10 decks
6%synergy
Helm of Awakening
10%inclusion1 decks10 decks
9%synergy
Enchantments
Black Market Connections
40%inclusion4 decks10 decks
15%synergy
Cover of Darkness
40%inclusion4 decks10 decks
37%synergy
Grave Pact
30%inclusion3 decks10 decks
11%synergy
Bad Moon
30%inclusion3 decks10 decks
27%synergy
Necromancy
20%inclusion2 decks10 decks
14%synergy
Carnival of Souls
20%inclusion2 decks10 decks
19%synergy
Animate Dead
20%inclusion2 decks10 decks
3%synergy
Oversold Cemetery
20%inclusion2 decks10 decks
15%synergy
Necrogen Communion
20%inclusion2 decks10 decks
18%synergy
The Meathook Massacre
10%inclusion1 decks10 decks
-7%synergy
Black Market
10%inclusion1 decks10 decks
-10%synergy
Glistening Oil
10%inclusion1 decks10 decks
9%synergy
Dictate of Erebos
10%inclusion1 decks10 decks
-1%synergy
Phyresis
10%inclusion1 decks10 decks
8%synergy
Necrodominance
10%inclusion1 decks10 decks
7%synergy
Dauthi Embrace
10%inclusion1 decks10 decks
8%synergy
Nowhere to Run
10%inclusion1 decks10 decks
7%synergy
Dark Prophecy
10%inclusion1 decks10 decks
6%synergy
Planeswalkers
Liliana of the Dark Realms
30%inclusion3 decks10 decks
16%synergy
Vraska, Betrayal's Sting
20%inclusion2 decks10 decks
17%synergy
Liliana, Dreadhorde General
10%inclusion1 decks10 decks
-4%synergy
Liliana Vess
10%inclusion1 decks10 decks
7%synergy
Utility Lands
Cabal Coffers
100%inclusion10 decks10 decks
45%synergy
Nykthos, Shrine to Nyx
60%inclusion6 decks10 decks
30%synergy
Urborg, Tomb of Yawgmoth
60%inclusion6 decks10 decks
22%synergy
Bojuka Bog
50%inclusion5 decks10 decks
3%synergy
Karn's Bastion
50%inclusion5 decks10 decks
46%synergy
Three Tree City
50%inclusion5 decks10 decks
45%synergy
Susur Secundi, Void Altar
50%inclusion1 decks2 decks
43%synergy
Cabal Stronghold
40%inclusion4 decks10 decks
6%synergy
Mudflat Village
30%inclusion3 decks10 decks
27%synergy
Rogue's Passage
30%inclusion3 decks10 decks
11%synergy
Shizo, Death's Storehouse
20%inclusion2 decks10 decks
10%synergy
Phyrexian Tower
20%inclusion2 decks10 decks
-6%synergy
Mortuary Mire
20%inclusion2 decks10 decks
7%synergy
Crypt of Agadeem
20%inclusion2 decks10 decks
8%synergy
War Room
20%inclusion2 decks10 decks
4%synergy
Takenuma, Abandoned Mire
20%inclusion2 decks10 decks
4%synergy
Castle Locthwain
20%inclusion2 decks10 decks
3%synergy
Reliquary Tower
20%inclusion2 decks10 decks
-9%synergy
Vault of Whispers
10%inclusion1 decks10 decks
4%synergy
Desert of the Glorified
10%inclusion1 decks10 decks
8%synergy
Maze of Ith
10%inclusion1 decks10 decks
7%synergy
Vesuva
10%inclusion1 decks10 decks
7%synergy
Crystal Vein
10%inclusion1 decks10 decks
7%synergy
Witch's Cottage
10%inclusion1 decks10 decks
-14%synergy
Volrath's Stronghold
10%inclusion1 decks10 decks
6%synergy
Minas Morgul, Dark Fortress
10%inclusion1 decks10 decks
7%synergy
Deserted Temple
10%inclusion1 decks10 decks
6%synergy
Thespian's Stage
10%inclusion1 decks10 decks
5%synergy
Lake of the Dead
10%inclusion1 decks10 decks
5%synergy
Dark Depths
10%inclusion1 decks10 decks
9%synergy
Access Tunnel
10%inclusion1 decks10 decks
7%synergy
Mana Artifacts
Sol Ring
100%inclusion10 decks10 decks
15%synergy
Patchwork Banner
50%inclusion5 decks10 decks
46%synergy
The Soul Stone
50%inclusion1 decks2 decks
34%synergy
Arcane Signet
40%inclusion4 decks10 decks
-21%synergy
Caged Sun
20%inclusion2 decks10 decks
10%synergy
Charcoal Diamond
20%inclusion2 decks10 decks
-2%synergy
Glistening Sphere
20%inclusion2 decks10 decks
19%synergy
Throne of Eldraine
20%inclusion2 decks10 decks
11%synergy
Thought Vessel
20%inclusion2 decks10 decks
-5%synergy
Lotus Petal
10%inclusion1 decks10 decks
2%synergy
Heraldic Banner
10%inclusion1 decks10 decks
5%synergy
Mox Amber
10%inclusion1 decks10 decks
6%synergy
Decanter of Endless Water
10%inclusion1 decks10 decks
7%synergy
Mind Stone
10%inclusion1 decks10 decks
-18%synergy
Mox Opal
10%inclusion1 decks10 decks
7%synergy
Extraplanar Lens
10%inclusion1 decks10 decks
5%synergy
Mox Diamond
10%inclusion1 decks10 decks
6%synergy
Lands
Swamp
100%inclusion10 decks10 decks
5%synergy
Path of Ancestry
40%inclusion4 decks10 decks
35%synergy
Cavern of Souls
30%inclusion3 decks10 decks
23%synergy
Hagra Mauling
10%inclusion1 decks10 decks
6%synergy
Command Tower
10%inclusion1 decks10 decks
4%synergy
Myriad Landscape
10%inclusion1 decks10 decks
-14%synergy
Urza's Cave
10%inclusion1 decks10 decks
2%synergy
Agadeem's Awakening
10%inclusion1 decks10 decks
2%synergy
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