Karumonix, the Rat King (Commander) - Core Rat Colony

Karumonix, the Rat King
Rank #382
5decks
As CommanderAs CardAverage DeckDecks
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Budget
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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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Lands
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Rat Colony
100%inclusion5 decks5 decks
94%synergy
Pack Rat
100%inclusion5 decks5 decks
94%synergy
Piper of the Swarm
100%inclusion5 decks5 decks
93%synergy
Contagion Clasp
80%inclusion4 decks5 decks
78%synergy
Ichor Rats
80%inclusion4 decks5 decks
77%synergy
Karn's Bastion
80%inclusion4 decks5 decks
76%synergy
Dark Ritual
80%inclusion4 decks5 decks
13%synergy
Creatures
Ogre Slumlord
60%inclusion3 decks5 decks
50%synergy
Crypt Rats
60%inclusion3 decks5 decks
55%synergy
Blightbelly Rat
60%inclusion3 decks5 decks
56%synergy
Septic Rats
60%inclusion3 decks5 decks
58%synergy
Wave of Rats
60%inclusion3 decks5 decks
58%synergy
Typhoid Rats
60%inclusion3 decks5 decks
56%synergy
Rancid Rats
60%inclusion3 decks5 decks
57%synergy
Lord Skitter, Sewer King
60%inclusion3 decks5 decks
52%synergy
Relentless Rats
40%inclusion2 decks5 decks
38%synergy
Marrow-Gnawer
40%inclusion2 decks5 decks
37%synergy
Mukotai Ambusher
40%inclusion2 decks5 decks
39%synergy
Lord Skitter's Butcher
40%inclusion2 decks5 decks
37%synergy
Razortooth Rats
40%inclusion2 decks5 decks
39%synergy
Voracious Vermin
40%inclusion2 decks5 decks
37%synergy
Twisted Sewer-Witch
40%inclusion2 decks5 decks
39%synergy
Ratcatcher
40%inclusion2 decks5 decks
37%synergy
Elephant-Rat
25%inclusion1 decks4 decks
25%synergy
Bog Rats
20%inclusion1 decks5 decks
20%synergy
Chittering Rats
20%inclusion1 decks5 decks
19%synergy
Nezumi Ronin
20%inclusion1 decks5 decks
20%synergy
Abhorrent Overlord
20%inclusion1 decks5 decks
16%synergy
Dread Cacodemon
20%inclusion1 decks5 decks
20%synergy
Burglar Rat
20%inclusion1 decks5 decks
9%synergy
Thornplate Intimidator
20%inclusion1 decks5 decks
19%synergy
Skull Collector
20%inclusion1 decks5 decks
20%synergy
Species Specialist
20%inclusion1 decks5 decks
17%synergy
Skullsnatcher
20%inclusion1 decks5 decks
19%synergy
Throat Slitter
20%inclusion1 decks5 decks
18%synergy
Ink-Eyes, Servant of Oni
20%inclusion1 decks5 decks
17%synergy
Tymaret, Chosen from Death
20%inclusion1 decks5 decks
19%synergy
Sinuous Vermin
20%inclusion1 decks5 decks
20%synergy
Nirkana Revenant
20%inclusion1 decks5 decks
9%synergy
Locust Miser
20%inclusion1 decks5 decks
18%synergy
Persistent Marshstalker
20%inclusion1 decks5 decks
17%synergy
Engine Rat
20%inclusion1 decks5 decks
18%synergy
Swarm of Rats
20%inclusion1 decks5 decks
17%synergy
Chittering Skitterling
20%inclusion1 decks5 decks
19%synergy
Kuro's Taken
20%inclusion1 decks5 decks
20%synergy
Ossuary Rats
20%inclusion1 decks5 decks
20%synergy
Yawgmoth, Thran Physician
20%inclusion1 decks5 decks
10%synergy
Nezumi Cutthroat
20%inclusion1 decks5 decks
19%synergy
Crypt Ghast
20%inclusion1 decks5 decks
-28%synergy
Changeling Outcast
20%inclusion1 decks5 decks
15%synergy
Nezumi Prowler
20%inclusion1 decks5 decks
19%synergy
Drainpipe Vermin
20%inclusion1 decks5 decks
19%synergy
Pestilence Rats
20%inclusion1 decks5 decks
18%synergy
Gnat Miser
20%inclusion1 decks5 decks
17%synergy
Nashi, Moon Sage's Scion
20%inclusion1 decks5 decks
16%synergy
Skithiryx, the Blight Dragon
20%inclusion1 decks5 decks
19%synergy
Stronghold Rats
20%inclusion1 decks5 decks
16%synergy
Instants
Vraska's Fall
60%inclusion3 decks5 decks
57%synergy
Whisper of the Dross
40%inclusion2 decks5 decks
37%synergy
Alesha's Legacy
25%inclusion1 decks4 decks
24%synergy
Unbury
25%inclusion1 decks4 decks
24%synergy
Force of Despair
20%inclusion1 decks5 decks
12%synergy
Sheoldred's Edict
20%inclusion1 decks5 decks
5%synergy
Imp's Mischief
20%inclusion1 decks5 decks
-5%synergy
Consuming Corruption
20%inclusion1 decks5 decks
4%synergy
Grim Affliction
20%inclusion1 decks5 decks
18%synergy
Defile
20%inclusion1 decks5 decks
-16%synergy
Cabal Ritual
20%inclusion1 decks5 decks
2%synergy
Bitter Triumph
20%inclusion1 decks5 decks
10%synergy
Disfigure
20%inclusion1 decks5 decks
19%synergy
Tainted Strike
20%inclusion1 decks5 decks
17%synergy
Foul-Tongue Shriek
20%inclusion1 decks5 decks
18%synergy
Black Sun's Twilight
20%inclusion1 decks5 decks
17%synergy
Consumed by Greed
20%inclusion1 decks5 decks
19%synergy
Offer Immortality
20%inclusion1 decks5 decks
18%synergy
Erebos's Intervention
20%inclusion1 decks5 decks
18%synergy
Suffer the Past
20%inclusion1 decks5 decks
20%synergy
Tragic Slip
20%inclusion1 decks5 decks
0%synergy
Sorceries
Vat Emergence
60%inclusion3 decks5 decks
59%synergy
Phyresis Outbreak
60%inclusion3 decks5 decks
58%synergy
Feed the Swarm
60%inclusion3 decks5 decks
10%synergy
Infectious Inquiry
60%inclusion3 decks5 decks
57%synergy
Drown in Ichor
60%inclusion3 decks5 decks
56%synergy
Spread the Sickness
40%inclusion2 decks5 decks
39%synergy
Diabolic Tutor
40%inclusion2 decks5 decks
26%synergy
Crippling Fear
40%inclusion2 decks5 decks
37%synergy
Decode Transmissions
25%inclusion1 decks4 decks
24%synergy
Spark Harvest
20%inclusion1 decks5 decks
19%synergy
Profane Tutor
20%inclusion1 decks5 decks
16%synergy
Torment of Hailfire
20%inclusion1 decks5 decks
5%synergy
Return from Extinction
20%inclusion1 decks5 decks
19%synergy
Battle at the Bridge
20%inclusion1 decks5 decks
19%synergy
Feed the Infection
20%inclusion1 decks5 decks
19%synergy
Swarmyard Massacre
20%inclusion1 decks5 decks
18%synergy
Agadeem's Awakening
20%inclusion1 decks5 decks
13%synergy
Echoing Return
20%inclusion1 decks5 decks
17%synergy
Dark Petition
20%inclusion1 decks5 decks
16%synergy
Night's Whisper
20%inclusion1 decks5 decks
-5%synergy
Exsanguinate
20%inclusion1 decks5 decks
-5%synergy
Illicit Shipment
20%inclusion1 decks5 decks
19%synergy
Fruit of Tizerus
20%inclusion1 decks5 decks
20%synergy
Diresight
20%inclusion1 decks5 decks
17%synergy
Corrupt
20%inclusion1 decks5 decks
17%synergy
Liturgy of Blood
20%inclusion1 decks5 decks
20%synergy
Overwhelming Forces
20%inclusion1 decks5 decks
19%synergy
Grim Discovery
20%inclusion1 decks5 decks
20%synergy
Sign in Blood
20%inclusion1 decks5 decks
-15%synergy
Utility Artifacts
Contagion Engine
40%inclusion2 decks5 decks
38%synergy
Bontu's Monument
40%inclusion2 decks5 decks
12%synergy
Jet Medallion
40%inclusion2 decks5 decks
-22%synergy
Swiftfoot Boots
40%inclusion2 decks5 decks
9%synergy
Chronicle of Victory
25%inclusion1 decks4 decks
22%synergy
Gathering Stone
25%inclusion1 decks4 decks
24%synergy
Malefic Scythe
20%inclusion1 decks5 decks
20%synergy
Mirror Box
20%inclusion1 decks5 decks
19%synergy
Erratic Portal
20%inclusion1 decks5 decks
20%synergy
Whip of Erebos
20%inclusion1 decks5 decks
9%synergy
Cloudstone Curio
20%inclusion1 decks5 decks
20%synergy
Trailblazer's Boots
20%inclusion1 decks5 decks
18%synergy
Hall of Triumph
20%inclusion1 decks5 decks
20%synergy
Expedition Map
20%inclusion1 decks5 decks
8%synergy
Door of Destinies
20%inclusion1 decks5 decks
18%synergy
Blade of Selves
20%inclusion1 decks5 decks
19%synergy
Mask of Avacyn
20%inclusion1 decks5 decks
19%synergy
Thrumming Stone
20%inclusion1 decks5 decks
16%synergy
Locket of Yesterdays
20%inclusion1 decks5 decks
20%synergy
Lightning Greaves
20%inclusion1 decks5 decks
-14%synergy
Howling Mine
20%inclusion1 decks5 decks
16%synergy
Grafted Exoskeleton
20%inclusion1 decks5 decks
19%synergy
Basilisk Collar
20%inclusion1 decks5 decks
17%synergy
Enchantments
Cover of Darkness
40%inclusion2 decks5 decks
37%synergy
Blanket of Night
20%inclusion1 decks5 decks
20%synergy
Glistening Oil
20%inclusion1 decks5 decks
19%synergy
Phyrexian Reclamation
20%inclusion1 decks5 decks
10%synergy
Grave Pact
20%inclusion1 decks5 decks
1%synergy
Relic Putrescence
20%inclusion1 decks5 decks
20%synergy
Phyresis
20%inclusion1 decks5 decks
18%synergy
Oversold Cemetery
20%inclusion1 decks5 decks
15%synergy
Phyrexian Arena
20%inclusion1 decks5 decks
-20%synergy
Bad Moon
20%inclusion1 decks5 decks
17%synergy
Necrogen Communion
20%inclusion1 decks5 decks
18%synergy
Planeswalkers
Vraska, Betrayal's Sting
40%inclusion2 decks5 decks
37%synergy
Liliana of the Dark Realms
40%inclusion2 decks5 decks
26%synergy
Utility Lands
Swarmyard
60%inclusion3 decks5 decks
54%synergy
Bojuka Bog
40%inclusion2 decks5 decks
-7%synergy
Witch's Cottage
40%inclusion2 decks5 decks
15%synergy
Mudflat Village
40%inclusion2 decks5 decks
37%synergy
Castle Locthwain
40%inclusion2 decks5 decks
23%synergy
Three Tree City
40%inclusion2 decks5 decks
35%synergy
Susur Secundi, Void Altar
25%inclusion1 decks4 decks
18%synergy
Secret Tunnel
25%inclusion1 decks4 decks
24%synergy
Cabal Stronghold
20%inclusion1 decks5 decks
-15%synergy
Mortuary Mire
20%inclusion1 decks5 decks
7%synergy
Memorial to Folly
20%inclusion1 decks5 decks
17%synergy
Barren Moor
20%inclusion1 decks5 decks
10%synergy
Vesuva
20%inclusion1 decks5 decks
17%synergy
Crypt of Agadeem
20%inclusion1 decks5 decks
9%synergy
Inkmoth Nexus
20%inclusion1 decks5 decks
19%synergy
Piranha Marsh
20%inclusion1 decks5 decks
19%synergy
Cabal Coffers
20%inclusion1 decks5 decks
-35%synergy
Nykthos, Shrine to Nyx
20%inclusion1 decks5 decks
-10%synergy
Cryptic Caves
20%inclusion1 decks5 decks
20%synergy
Blighted Fen
20%inclusion1 decks5 decks
19%synergy
Sanctum of Eternity
20%inclusion1 decks5 decks
19%synergy
Leechridden Swamp
20%inclusion1 decks5 decks
17%synergy
Access Tunnel
20%inclusion1 decks5 decks
17%synergy
Rogue's Passage
20%inclusion1 decks5 decks
1%synergy
Mana Artifacts
Staff of Compleation
60%inclusion3 decks5 decks
58%synergy
Glistening Sphere
60%inclusion3 decks5 decks
59%synergy
Caged Sun
40%inclusion2 decks5 decks
29%synergy
Heraldic Banner
40%inclusion2 decks5 decks
35%synergy
Sol Ring
40%inclusion2 decks5 decks
-46%synergy
Arcane Signet
20%inclusion1 decks5 decks
-42%synergy
Altar of the Pantheon
20%inclusion1 decks5 decks
20%synergy
Altar of Shadows
20%inclusion1 decks5 decks
20%synergy
Patchwork Banner
20%inclusion1 decks5 decks
16%synergy
Skull of Ramos
20%inclusion1 decks5 decks
20%synergy
Mind Stone
20%inclusion1 decks5 decks
-9%synergy
Nyx Lotus
20%inclusion1 decks5 decks
14%synergy
Lands
Swamp
100%inclusion5 decks5 decks
5%synergy
Urza's Cave
40%inclusion2 decks5 decks
32%synergy
Path of Ancestry
40%inclusion2 decks5 decks
35%synergy
Vivid Marsh
20%inclusion1 decks5 decks
20%synergy
Agadeem's Awakening
20%inclusion1 decks5 decks
13%synergy
Unclaimed Territory
20%inclusion1 decks5 decks
20%synergy
Cavern of Souls
20%inclusion1 decks5 decks
13%synergy
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