Karumonix, the Rat King (Commander) - Upgraded Proliferate

Karumonix, the Rat King
Rank #412
4decks
As CommanderAs CardAverage DeckDecks
Bracket
All123
4
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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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Infectious Inquiry
100%inclusion4 decks4 decks
97%synergy
Tangled Colony
100%inclusion4 decks4 decks
97%synergy
Vraska's Fall
100%inclusion4 decks4 decks
97%synergy
Stronghold Rats
100%inclusion4 decks4 decks
97%synergy
Swarmyard
100%inclusion4 decks4 decks
94%synergy
Burglar Rat
100%inclusion4 decks4 decks
90%synergy
Dark Ritual
100%inclusion4 decks4 decks
33%synergy
Game Changers
Demonic Tutor
25%inclusion1 decks4 decks
-2%synergy
Vampiric Tutor
25%inclusion1 decks4 decks
4%synergy
Creatures
Rat King, Verminister
100%inclusion2 decks2 decks
97%synergy
Rat King, Pale Piper
100%inclusion2 decks2 decks
96%synergy
Ogre Slumlord
75%inclusion3 decks4 decks
66%synergy
Marrow-Gnawer
75%inclusion3 decks4 decks
72%synergy
Pack Rat
75%inclusion3 decks4 decks
69%synergy
Throat Slitter
75%inclusion3 decks4 decks
73%synergy
Swarm of Rats
75%inclusion3 decks4 decks
73%synergy
Chittering Witch
75%inclusion3 decks4 decks
71%synergy
Voracious Vermin
75%inclusion3 decks4 decks
72%synergy
Piper of the Swarm
75%inclusion3 decks4 decks
68%synergy
Nezumi Informant
75%inclusion3 decks4 decks
69%synergy
Ratcatcher
75%inclusion3 decks4 decks
72%synergy
Blightbelly Rat
75%inclusion3 decks4 decks
72%synergy
Septic Rats
75%inclusion3 decks4 decks
73%synergy
Typhoid Rats
75%inclusion3 decks4 decks
72%synergy
Rancid Rats
75%inclusion3 decks4 decks
73%synergy
Rat Colony
75%inclusion3 decks4 decks
70%synergy
Lord Skitter, Sewer King
75%inclusion3 decks4 decks
67%synergy
Ichor Rats
75%inclusion3 decks4 decks
72%synergy
Crypt Rats
50%inclusion2 decks4 decks
46%synergy
Rotting Rats
50%inclusion2 decks4 decks
47%synergy
Gray Merchant of Asphodel
50%inclusion2 decks4 decks
-0%synergy
Lord Skitter's Butcher
50%inclusion2 decks4 decks
47%synergy
Zodiac Rat
50%inclusion2 decks4 decks
50%synergy
Locust Miser
50%inclusion2 decks4 decks
49%synergy
Persistent Marshstalker
50%inclusion2 decks4 decks
47%synergy
Ashcoat of the Shadow Swarm
50%inclusion2 decks4 decks
46%synergy
Changeling Outcast
50%inclusion2 decks4 decks
45%synergy
Wave of Rats
50%inclusion2 decks4 decks
48%synergy
Gnat Miser
50%inclusion2 decks4 decks
47%synergy
Refurbished Familiar
25%inclusion1 decks4 decks
23%synergy
Bog Rats
25%inclusion1 decks4 decks
25%synergy
Midnight Scavengers
25%inclusion1 decks4 decks
25%synergy
Gnawing Vermin
25%inclusion1 decks4 decks
24%synergy
Ayara, First of Locthwain
25%inclusion1 decks4 decks
-0%synergy
Filth
25%inclusion1 decks4 decks
23%synergy
Species Specialist
25%inclusion1 decks4 decks
22%synergy
Ink-Eyes, Servant of Oni
25%inclusion1 decks4 decks
22%synergy
Earsplitting Rats
25%inclusion1 decks4 decks
25%synergy
Engine Rat
25%inclusion1 decks4 decks
23%synergy
Bilious Skulldweller
25%inclusion1 decks4 decks
24%synergy
Graf Rats
25%inclusion1 decks4 decks
25%synergy
Valley Rotcaller
25%inclusion1 decks4 decks
22%synergy
Nezumi Cutthroat
25%inclusion1 decks4 decks
24%synergy
Nezumi Prowler
25%inclusion1 decks4 decks
24%synergy
Drainpipe Vermin
25%inclusion1 decks4 decks
24%synergy
Pestilence Rats
25%inclusion1 decks4 decks
23%synergy
Nezumi Bone-Reader
25%inclusion1 decks4 decks
24%synergy
Okiba-Gang Shinobi
25%inclusion1 decks4 decks
24%synergy
Undercity Dire Rat
25%inclusion1 decks4 decks
23%synergy
Instants
Whisper of the Dross
75%inclusion3 decks4 decks
72%synergy
Go for the Throat
50%inclusion2 decks4 decks
28%synergy
Rat Out
50%inclusion2 decks4 decks
49%synergy
Doom Blade
50%inclusion2 decks4 decks
43%synergy
Culling the Weak
50%inclusion2 decks4 decks
32%synergy
Murder
50%inclusion2 decks4 decks
40%synergy
Malakir Rebirth
50%inclusion2 decks4 decks
26%synergy
Rabid Attack
50%inclusion1 decks2 decks
49%synergy
Hero's Downfall
25%inclusion1 decks4 decks
19%synergy
Deadly Rollick
25%inclusion1 decks4 decks
-1%synergy
Fell the Profane
25%inclusion1 decks4 decks
5%synergy
Force of Despair
25%inclusion1 decks4 decks
18%synergy
Village Rites
25%inclusion1 decks4 decks
-1%synergy
Consuming Corruption
25%inclusion1 decks4 decks
10%synergy
Grim Affliction
25%inclusion1 decks4 decks
23%synergy
Deadly Dispute
25%inclusion1 decks4 decks
-2%synergy
Defile
25%inclusion1 decks4 decks
-10%synergy
Virulent Wound
25%inclusion1 decks4 decks
25%synergy
Darkness
25%inclusion1 decks4 decks
14%synergy
Infernal Grasp
25%inclusion1 decks4 decks
-0%synergy
Tainted Strike
25%inclusion1 decks4 decks
22%synergy
Foul-Tongue Shriek
25%inclusion1 decks4 decks
23%synergy
Fake Your Own Death
25%inclusion1 decks4 decks
17%synergy
Gravepurge
25%inclusion1 decks4 decks
24%synergy
Nameless Inversion
25%inclusion1 decks4 decks
25%synergy
Tragic Slip
25%inclusion1 decks4 decks
6%synergy
Withering Torment
25%inclusion1 decks4 decks
-7%synergy
Sorceries
Drown in Ichor
75%inclusion3 decks4 decks
72%synergy
Psychic Whorl
50%inclusion2 decks4 decks
50%synergy
Phyresis Outbreak
50%inclusion2 decks4 decks
48%synergy
Sign in Blood
50%inclusion2 decks4 decks
15%synergy
Kindred Dominance
50%inclusion2 decks4 decks
45%synergy
Damnation
50%inclusion2 decks4 decks
30%synergy
Bloodline Bidding
50%inclusion1 decks2 decks
46%synergy
Vat Emergence
25%inclusion1 decks4 decks
24%synergy
Victimize
25%inclusion1 decks4 decks
-3%synergy
Revenge of the Rats
25%inclusion1 decks4 decks
22%synergy
Feed the Infection
25%inclusion1 decks4 decks
24%synergy
Unearth
25%inclusion1 decks4 decks
16%synergy
Swarmyard Massacre
25%inclusion1 decks4 decks
23%synergy
Feed the Swarm
25%inclusion1 decks4 decks
-25%synergy
Echoing Return
25%inclusion1 decks4 decks
22%synergy
Read the Bones
25%inclusion1 decks4 decks
9%synergy
Night's Whisper
25%inclusion1 decks4 decks
-1%synergy
Caress of Phyrexia
25%inclusion1 decks4 decks
24%synergy
Reanimate
25%inclusion1 decks4 decks
-16%synergy
Syphon Mind
25%inclusion1 decks4 decks
13%synergy
Lab Rats
25%inclusion1 decks4 decks
25%synergy
Brainspoil
25%inclusion1 decks4 decks
25%synergy
Grim Tutor
25%inclusion1 decks4 decks
14%synergy
Crippling Fear
25%inclusion1 decks4 decks
22%synergy
Pact of the Serpent
25%inclusion1 decks4 decks
23%synergy
Utility Artifacts
Bontu's Monument
75%inclusion3 decks4 decks
47%synergy
Banner of Kinship
50%inclusion2 decks4 decks
48%synergy
Jet Medallion
50%inclusion2 decks4 decks
-12%synergy
The Darkness Crystal
50%inclusion2 decks4 decks
30%synergy
Crawlspace
25%inclusion1 decks4 decks
24%synergy
Skeleton Key
25%inclusion1 decks4 decks
24%synergy
Contagion Clasp
25%inclusion1 decks4 decks
23%synergy
Contagion Engine
25%inclusion1 decks4 decks
23%synergy
Skullclamp
25%inclusion1 decks4 decks
3%synergy
Sword of the Squeak
25%inclusion1 decks4 decks
24%synergy
Sword of Truth and Justice
25%inclusion1 decks4 decks
24%synergy
Vanquisher's Banner
25%inclusion1 decks4 decks
21%synergy
Recon Craft Theta
25%inclusion1 decks4 decks
25%synergy
Urza's Incubator
25%inclusion1 decks4 decks
23%synergy
Herald's Horn
25%inclusion1 decks4 decks
19%synergy
Enchantments
Kaya's Ghostform
50%inclusion2 decks4 decks
40%synergy
Cover of Darkness
50%inclusion2 decks4 decks
47%synergy
Black Market
25%inclusion1 decks4 decks
5%synergy
Okiba Reckoner Raid
25%inclusion1 decks4 decks
25%synergy
Grave Pact
25%inclusion1 decks4 decks
5%synergy
Call of the Ring
25%inclusion1 decks4 decks
23%synergy
Oubliette
25%inclusion1 decks4 decks
22%synergy
Black Market Connections
25%inclusion1 decks4 decks
-0%synergy
Phyrexian Arena
25%inclusion1 decks4 decks
-14%synergy
Bad Moon
25%inclusion1 decks4 decks
22%synergy
Necrogen Communion
25%inclusion1 decks4 decks
23%synergy
Planeswalkers
Vraska, Betrayal's Sting
75%inclusion3 decks4 decks
72%synergy
Liliana of the Dark Realms
25%inclusion1 decks4 decks
11%synergy
Utility Lands
Karn's Bastion
75%inclusion3 decks4 decks
71%synergy
Mudflat Village
75%inclusion3 decks4 decks
72%synergy
Mortuary Mire
50%inclusion2 decks4 decks
37%synergy
Witch's Cottage
50%inclusion2 decks4 decks
25%synergy
Cabal Coffers
50%inclusion2 decks4 decks
-5%synergy
Minas Morgul, Dark Fortress
50%inclusion2 decks4 decks
47%synergy
Reliquary Tower
50%inclusion2 decks4 decks
21%synergy
Bojuka Bog
25%inclusion1 decks4 decks
-22%synergy
Cabal Stronghold
25%inclusion1 decks4 decks
-9%synergy
Phyrexian Tower
25%inclusion1 decks4 decks
-2%synergy
Tyrite Sanctum
25%inclusion1 decks4 decks
24%synergy
Crypt of Agadeem
25%inclusion1 decks4 decks
13%synergy
War Room
25%inclusion1 decks4 decks
9%synergy
Peat Bog
25%inclusion1 decks4 decks
23%synergy
Three Tree City
25%inclusion1 decks4 decks
20%synergy
Urborg, Tomb of Yawgmoth
25%inclusion1 decks4 decks
-13%synergy
Access Tunnel
25%inclusion1 decks4 decks
22%synergy
Everglades
25%inclusion1 decks4 decks
24%synergy
Rogue's Passage
25%inclusion1 decks4 decks
5%synergy
Mana Artifacts
Sol Ring
100%inclusion4 decks4 decks
15%synergy
Patchwork Banner
50%inclusion2 decks4 decks
45%synergy
Arcane Signet
25%inclusion1 decks4 decks
-36%synergy
Staff of Compleation
25%inclusion1 decks4 decks
23%synergy
Glistening Sphere
25%inclusion1 decks4 decks
24%synergy
Throne of Eldraine
25%inclusion1 decks4 decks
16%synergy
Thought Vessel
25%inclusion1 decks4 decks
1%synergy
Lands
Swamp
100%inclusion4 decks4 decks
5%synergy
Path of Ancestry
75%inclusion3 decks4 decks
70%synergy
Escape Tunnel
50%inclusion2 decks4 decks
49%synergy
Malakir Rebirth
50%inclusion2 decks4 decks
26%synergy
Fell the Profane
25%inclusion1 decks4 decks
5%synergy
Command Tower
25%inclusion1 decks4 decks
19%synergy
The Seedcore
25%inclusion1 decks4 decks
25%synergy
Myriad Landscape
25%inclusion1 decks4 decks
1%synergy
Mirrex
25%inclusion1 decks4 decks
24%synergy
Cavern of Souls
25%inclusion1 decks4 decks
18%synergy
Evolving Wilds
25%inclusion1 decks4 decks
21%synergy
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