Karumonix, the Rat King (Commander) - Expensive Upgraded Infect

Karumonix, the Rat King
Rank #385
7decks
As CommanderAs CardAverage DeckDecks
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Background image for Building Rat Typal With Marrow-Gnawer
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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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Shredder's Technique
20%inclusion1 decks5 decks
16%synergy
Rat King, Pale Piper
20%inclusion1 decks5 decks
16%synergy
High Synergy Cards
Ichor Rats
100%inclusion7 decks7 decks
97%synergy
Marrow-Gnawer
100%inclusion7 decks7 decks
97%synergy
Ashcoat of the Shadow Swarm
100%inclusion7 decks7 decks
97%synergy
Blightbelly Rat
100%inclusion7 decks7 decks
96%synergy
Swarmyard
86%inclusion6 decks7 decks
80%synergy
Pack Rat
86%inclusion6 decks7 decks
80%synergy
Piper of the Swarm
86%inclusion6 decks7 decks
79%synergy
Lord Skitter, Sewer King
86%inclusion6 decks7 decks
77%synergy
Ogre Slumlord
86%inclusion6 decks7 decks
76%synergy
Infectious Inquiry
71%inclusion5 decks7 decks
69%synergy
Top Cards
Dark Ritual
71%inclusion5 decks7 decks
5%synergy
Skullclamp
71%inclusion5 decks7 decks
49%synergy
Bontu's Monument
71%inclusion5 decks7 decks
43%synergy
Jet Medallion
71%inclusion5 decks7 decks
10%synergy
Nashi, Moon Sage's Scion
71%inclusion5 decks7 decks
68%synergy
Cover of Darkness
71%inclusion5 decks7 decks
69%synergy
Deadly Rollick
57%inclusion4 decks7 decks
33%synergy
Vraska, Betrayal's Sting
57%inclusion4 decks7 decks
55%synergy
Go for the Throat
57%inclusion4 decks7 decks
34%synergy
Vraska's Fall
57%inclusion4 decks7 decks
54%synergy
Game Changers
Demonic Tutor
71%inclusion5 decks7 decks
44%synergy
Vampiric Tutor
57%inclusion4 decks7 decks
36%synergy
Bolas's Citadel
43%inclusion3 decks7 decks
14%synergy
Ancient Tomb
14%inclusion1 decks7 decks
3%synergy
The One Ring
14%inclusion1 decks7 decks
5%synergy
Chrome Mox
14%inclusion1 decks7 decks
8%synergy
Mox Diamond
14%inclusion1 decks7 decks
11%synergy
Creatures
Lord Skitter's Butcher
43%inclusion3 decks7 decks
40%synergy
Species Specialist
43%inclusion3 decks7 decks
39%synergy
Crypt Ghast
43%inclusion3 decks7 decks
-5%synergy
Wave of Rats
43%inclusion3 decks7 decks
41%synergy
Rat Colony
43%inclusion3 decks7 decks
37%synergy
Metallic Mimic
29%inclusion2 decks7 decks
28%synergy
Burglar Rat
29%inclusion2 decks7 decks
18%synergy
Ayara, First of Locthwain
29%inclusion2 decks7 decks
3%synergy
Adaptive Automaton
29%inclusion2 decks7 decks
28%synergy
Throat Slitter
29%inclusion2 decks7 decks
27%synergy
Ink-Eyes, Servant of Oni
29%inclusion2 decks7 decks
25%synergy
Persistent Marshstalker
29%inclusion2 decks7 decks
26%synergy
Voracious Vermin
29%inclusion2 decks7 decks
26%synergy
Valley Rotcaller
29%inclusion2 decks7 decks
26%synergy
Twisted Sewer-Witch
29%inclusion2 decks7 decks
27%synergy
Changeling Outcast
29%inclusion2 decks7 decks
23%synergy
Nezumi Informant
29%inclusion2 decks7 decks
22%synergy
Nezumi Prowler
29%inclusion2 decks7 decks
27%synergy
Ratcatcher
29%inclusion2 decks7 decks
25%synergy
Gnat Miser
29%inclusion2 decks7 decks
26%synergy
Stronghold Rats
29%inclusion2 decks7 decks
25%synergy
Undercity Dire Rat
17%inclusion1 decks6 decks
15%synergy
Refurbished Familiar
14%inclusion1 decks7 decks
12%synergy
Relentless Rats
14%inclusion1 decks7 decks
13%synergy
Nezumi Graverobber
14%inclusion1 decks7 decks
13%synergy
Rotting Rats
14%inclusion1 decks7 decks
11%synergy
Dark Confidant
14%inclusion1 decks7 decks
7%synergy
Priest of Forgotten Gods
14%inclusion1 decks7 decks
6%synergy
Blood Artist
14%inclusion1 decks7 decks
-17%synergy
Morbid Opportunist
14%inclusion1 decks7 decks
-9%synergy
Roaming Throne
14%inclusion1 decks7 decks
11%synergy
Gray Merchant of Asphodel
14%inclusion1 decks7 decks
-37%synergy
Tangled Colony
14%inclusion1 decks7 decks
11%synergy
Nezumi Shortfang
14%inclusion1 decks7 decks
13%synergy
Diseased Vermin
14%inclusion1 decks7 decks
14%synergy
Insatiable Frugivore
14%inclusion1 decks7 decks
14%synergy
Bloodline Pretender
14%inclusion1 decks7 decks
14%synergy
Skullsnatcher
14%inclusion1 decks7 decks
14%synergy
Locust Miser
14%inclusion1 decks7 decks
13%synergy
Zulaport Cutthroat
14%inclusion1 decks7 decks
-9%synergy
Mogis's Marauder
14%inclusion1 decks7 decks
13%synergy
Engine Rat
14%inclusion1 decks7 decks
13%synergy
Swarm of Rats
14%inclusion1 decks7 decks
12%synergy
Chittering Skitterling
14%inclusion1 decks7 decks
13%synergy
Grim Hireling
14%inclusion1 decks7 decks
10%synergy
Chittering Witch
14%inclusion1 decks7 decks
10%synergy
Pestilence Rats
14%inclusion1 decks7 decks
12%synergy
Nezumi Bone-Reader
14%inclusion1 decks7 decks
13%synergy
Typhoid Rats
14%inclusion1 decks7 decks
11%synergy
Midnight Reaper
14%inclusion1 decks7 decks
6%synergy
Instants
Village Rites
43%inclusion3 decks7 decks
18%synergy
Sudden Spoiling
43%inclusion3 decks7 decks
34%synergy
Fell the Profane
29%inclusion2 decks7 decks
10%synergy
Defile
29%inclusion2 decks7 decks
-8%synergy
Hagra Mauling
14%inclusion1 decks7 decks
10%synergy
Imp's Mischief
14%inclusion1 decks7 decks
-10%synergy
Snuff Out
14%inclusion1 decks7 decks
1%synergy
Vraska's Contempt
14%inclusion1 decks7 decks
14%synergy
Anoint with Affliction
14%inclusion1 decks7 decks
14%synergy
Deadly Dispute
14%inclusion1 decks7 decks
-11%synergy
Poison the Cup
14%inclusion1 decks7 decks
14%synergy
Cabal Ritual
14%inclusion1 decks7 decks
-4%synergy
Culling the Weak
14%inclusion1 decks7 decks
-1%synergy
Darkness
14%inclusion1 decks7 decks
4%synergy
Tainted Strike
14%inclusion1 decks7 decks
11%synergy
Malakir Rebirth
14%inclusion1 decks7 decks
-9%synergy
Baleful Mastery
14%inclusion1 decks7 decks
6%synergy
Plumb the Forbidden
14%inclusion1 decks7 decks
10%synergy
Corrupted Conviction
14%inclusion1 decks7 decks
2%synergy
Ashnod's Intervention
14%inclusion1 decks7 decks
13%synergy
Liliana's Triumph
14%inclusion1 decks7 decks
8%synergy
Cast Down
14%inclusion1 decks7 decks
13%synergy
Curtains' Call
14%inclusion1 decks7 decks
13%synergy
Erebos's Intervention
14%inclusion1 decks7 decks
12%synergy
Feign Death
14%inclusion1 decks7 decks
6%synergy
Tragic Slip
14%inclusion1 decks7 decks
-6%synergy
Dismember
14%inclusion1 decks7 decks
4%synergy
Sorceries
Phyresis Outbreak
57%inclusion4 decks7 decks
55%synergy
Toxic Deluge
57%inclusion4 decks7 decks
20%synergy
Diabolic Intent
43%inclusion3 decks7 decks
28%synergy
Patriarch's Bidding
43%inclusion3 decks7 decks
39%synergy
Feed the Swarm
43%inclusion3 decks7 decks
-8%synergy
Kindred Dominance
43%inclusion3 decks7 decks
38%synergy
Drown in Ichor
43%inclusion3 decks7 decks
39%synergy
Agadeem's Awakening
29%inclusion2 decks7 decks
21%synergy
Echoing Return
29%inclusion2 decks7 decks
25%synergy
Night's Whisper
29%inclusion2 decks7 decks
4%synergy
Reanimate
29%inclusion2 decks7 decks
-11%synergy
Damnation
29%inclusion2 decks7 decks
8%synergy
Pact of the Serpent
29%inclusion2 decks7 decks
27%synergy
Bloodline Bidding
20%inclusion1 decks5 decks
15%synergy
Diabolic Tutor
14%inclusion1 decks7 decks
0%synergy
Profane Tutor
14%inclusion1 decks7 decks
10%synergy
Torment of Hailfire
14%inclusion1 decks7 decks
-1%synergy
Haunting Voyage
14%inclusion1 decks7 decks
13%synergy
Bubbling Muck
14%inclusion1 decks7 decks
-1%synergy
Predators' Hour
14%inclusion1 decks7 decks
13%synergy
Swarmyard Massacre
14%inclusion1 decks7 decks
12%synergy
Tendrils of Agony
14%inclusion1 decks7 decks
12%synergy
Exsanguinate
14%inclusion1 decks7 decks
-10%synergy
Call to the Netherworld
14%inclusion1 decks7 decks
13%synergy
Insatiable Avarice
14%inclusion1 decks7 decks
3%synergy
Phyrexian Tribute
14%inclusion1 decks7 decks
14%synergy
Disentomb
14%inclusion1 decks7 decks
13%synergy
Rise of the Dark Realms
14%inclusion1 decks7 decks
1%synergy
Grim Tutor
14%inclusion1 decks7 decks
3%synergy
Crippling Fear
14%inclusion1 decks7 decks
11%synergy
Plague of Vermin
14%inclusion1 decks7 decks
12%synergy
Utility Artifacts
Expedition Map
57%inclusion4 decks7 decks
45%synergy
Thrumming Stone
43%inclusion3 decks7 decks
39%synergy
Herald's Horn
43%inclusion3 decks7 decks
37%synergy
The Darkness Crystal
33%inclusion2 decks6 decks
13%synergy
Whip of Erebos
29%inclusion2 decks7 decks
18%synergy
Swiftfoot Boots
29%inclusion2 decks7 decks
-3%synergy
Chronicle of Victory
20%inclusion1 decks5 decks
17%synergy
Sensei's Divining Top
14%inclusion1 decks7 decks
6%synergy
Soul-Guide Lantern
14%inclusion1 decks7 decks
13%synergy
Mirror Box
14%inclusion1 decks7 decks
14%synergy
Contagion Clasp
14%inclusion1 decks7 decks
12%synergy
Contagion Engine
14%inclusion1 decks7 decks
12%synergy
Ashnod's Altar
14%inclusion1 decks7 decks
-5%synergy
Aetherflux Reservoir
14%inclusion1 decks7 decks
5%synergy
Coat of Arms
14%inclusion1 decks7 decks
12%synergy
Scroll Rack
14%inclusion1 decks7 decks
14%synergy
Transmogrant's Crown
14%inclusion1 decks7 decks
13%synergy
Sword of Truth and Justice
14%inclusion1 decks7 decks
14%synergy
Wishclaw Talisman
14%inclusion1 decks7 decks
8%synergy
Vanquisher's Banner
14%inclusion1 decks7 decks
10%synergy
Recon Craft Theta
14%inclusion1 decks7 decks
14%synergy
Sword of Hearth and Home
14%inclusion1 decks7 decks
13%synergy
Akroma's Memorial
14%inclusion1 decks7 decks
13%synergy
Maskwood Nexus
14%inclusion1 decks7 decks
13%synergy
Eldrazi Monument
14%inclusion1 decks7 decks
13%synergy
Lightning Greaves
14%inclusion1 decks7 decks
-19%synergy
Commander's Plate
14%inclusion1 decks7 decks
8%synergy
Lifeline
14%inclusion1 decks7 decks
14%synergy
Enchantments
Black Market Connections
57%inclusion4 decks7 decks
33%synergy
Phyrexian Arena
43%inclusion3 decks7 decks
3%synergy
The Meathook Massacre
29%inclusion2 decks7 decks
11%synergy
Haunted One
29%inclusion2 decks7 decks
26%synergy
Grave Pact
29%inclusion2 decks7 decks
9%synergy
Oversold Cemetery
29%inclusion2 decks7 decks
23%synergy
Dark Tutelage
14%inclusion1 decks7 decks
13%synergy
Contamination
14%inclusion1 decks7 decks
11%synergy
Phyrexian Reclamation
14%inclusion1 decks7 decks
4%synergy
Dictate of Erebos
14%inclusion1 decks7 decks
3%synergy
Exquisite Blood
14%inclusion1 decks7 decks
1%synergy
Intimidation
14%inclusion1 decks7 decks
14%synergy
No Mercy
14%inclusion1 decks7 decks
7%synergy
Gate to Phyrexia
14%inclusion1 decks7 decks
14%synergy
Bandit's Talent
14%inclusion1 decks7 decks
9%synergy
Oubliette
14%inclusion1 decks7 decks
11%synergy
Bastion of Remembrance
14%inclusion1 decks7 decks
-3%synergy
Lord Skitter's Blessing
14%inclusion1 decks7 decks
14%synergy
Nowhere to Run
14%inclusion1 decks7 decks
11%synergy
Dark Prophecy
14%inclusion1 decks7 decks
10%synergy
Necrogen Communion
14%inclusion1 decks7 decks
12%synergy
Planeswalkers
Liliana of the Dark Realms
29%inclusion2 decks7 decks
15%synergy
Davriel, Rogue Shadowmage
14%inclusion1 decks7 decks
13%synergy
Liliana, Dreadhorde General
14%inclusion1 decks7 decks
1%synergy
Utility Lands
Cabal Coffers
100%inclusion7 decks7 decks
45%synergy
Urborg, Tomb of Yawgmoth
100%inclusion7 decks7 decks
62%synergy
Nykthos, Shrine to Nyx
86%inclusion6 decks7 decks
56%synergy
Cabal Stronghold
57%inclusion4 decks7 decks
22%synergy
Bojuka Bog
43%inclusion3 decks7 decks
-4%synergy
War Room
43%inclusion3 decks7 decks
27%synergy
Three Tree City
43%inclusion3 decks7 decks
38%synergy
Rogue's Passage
43%inclusion3 decks7 decks
24%synergy
Secret Tunnel
33%inclusion2 decks6 decks
32%synergy
Urza's Saga
29%inclusion2 decks7 decks
21%synergy
Inkmoth Nexus
29%inclusion2 decks7 decks
28%synergy
Mutavault
29%inclusion2 decks7 decks
28%synergy
Deserted Temple
29%inclusion2 decks7 decks
24%synergy
Karn's Bastion
29%inclusion2 decks7 decks
25%synergy
Takenuma, Abandoned Mire
29%inclusion2 decks7 decks
13%synergy
Mudflat Village
29%inclusion2 decks7 decks
26%synergy
Castle Locthwain
29%inclusion2 decks7 decks
12%synergy
Shizo, Death's Storehouse
14%inclusion1 decks7 decks
4%synergy
Vault of Whispers
14%inclusion1 decks7 decks
9%synergy
Wasteland
14%inclusion1 decks7 decks
13%synergy
Phyrexian Tower
14%inclusion1 decks7 decks
-11%synergy
Mortuary Mire
14%inclusion1 decks7 decks
1%synergy
Soulstone Sanctuary
14%inclusion1 decks7 decks
14%synergy
Vesuva
14%inclusion1 decks7 decks
11%synergy
Blinkmoth Nexus
14%inclusion1 decks7 decks
14%synergy
Crypt of Agadeem
14%inclusion1 decks7 decks
3%synergy
Mishra's Factory
14%inclusion1 decks7 decks
14%synergy
Spymaster's Vault
14%inclusion1 decks7 decks
5%synergy
Witch's Cottage
14%inclusion1 decks7 decks
-10%synergy
Volrath's Stronghold
14%inclusion1 decks7 decks
11%synergy
Inventors' Fair
14%inclusion1 decks7 decks
12%synergy
Thespian's Stage
14%inclusion1 decks7 decks
9%synergy
Mishra's Foundry
14%inclusion1 decks7 decks
14%synergy
Lake of the Dead
14%inclusion1 decks7 decks
9%synergy
Reliquary Tower
14%inclusion1 decks7 decks
-16%synergy
Hive of the Eye Tyrant
14%inclusion1 decks7 decks
13%synergy
Strip Mine
14%inclusion1 decks7 decks
11%synergy
Mana Artifacts
Sol Ring
100%inclusion7 decks7 decks
14%synergy
Arcane Signet
57%inclusion4 decks7 decks
-5%synergy
Glistening Sphere
43%inclusion3 decks7 decks
42%synergy
The Soul Stone
33%inclusion2 decks6 decks
19%synergy
Staff of Compleation
29%inclusion2 decks7 decks
27%synergy
Firdoch Core
20%inclusion1 decks5 decks
20%synergy
Heraldic Banner
14%inclusion1 decks7 decks
9%synergy
Patchwork Banner
14%inclusion1 decks7 decks
10%synergy
Gilded Lotus
14%inclusion1 decks7 decks
9%synergy
Liquimetal Torque
14%inclusion1 decks7 decks
11%synergy
Mind Stone
14%inclusion1 decks7 decks
-15%synergy
Nyx Lotus
14%inclusion1 decks7 decks
8%synergy
Lands
Swamp
100%inclusion7 decks7 decks
5%synergy
Cavern of Souls
86%inclusion6 decks7 decks
79%synergy
Prismatic Vista
29%inclusion2 decks7 decks
26%synergy
Fell the Profane
29%inclusion2 decks7 decks
10%synergy
Agadeem's Awakening
29%inclusion2 decks7 decks
21%synergy
Path of Ancestry
29%inclusion2 decks7 decks
23%synergy
Hagra Mauling
14%inclusion1 decks7 decks
10%synergy
Fabled Passage
14%inclusion1 decks7 decks
12%synergy
Urza's Cave
14%inclusion1 decks7 decks
6%synergy
Ash Barrens
14%inclusion1 decks7 decks
13%synergy
Malakir Rebirth
14%inclusion1 decks7 decks
-9%synergy
Polluted Delta
14%inclusion1 decks7 decks
11%synergy
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