Karumonix, the Rat King (Commander) - Upgraded -1/-1 Counters

Karumonix, the Rat King
Rank #408
2decks
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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Lands
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Demonic Tutor
100%inclusion2 decks2 decks
73%synergy
Bolas's Citadel
50%inclusion1 decks2 decks
22%synergy
Vampiric Tutor
50%inclusion1 decks2 decks
29%synergy
Creatures
Blightbelly Rat
100%inclusion2 decks2 decks
97%synergy
Septic Rats
100%inclusion2 decks2 decks
98%synergy
Ichor Rats
100%inclusion2 decks2 decks
97%synergy
Phyrexian Juggernaut
50%inclusion1 decks2 decks
50%synergy
Plague Stinger
50%inclusion1 decks2 decks
49%synergy
Ogre Slumlord
50%inclusion1 decks2 decks
40%synergy
Core Prowler
50%inclusion1 decks2 decks
49%synergy
Crypt Rats
50%inclusion1 decks2 decks
46%synergy
Nezumi Graverobber
50%inclusion1 decks2 decks
49%synergy
Whispering Specter
50%inclusion1 decks2 decks
49%synergy
Pestilent Syphoner
50%inclusion1 decks2 decks
49%synergy
Rotting Rats
50%inclusion1 decks2 decks
47%synergy
Reaper of Sheoldred
50%inclusion1 decks2 decks
49%synergy
Marrow-Gnawer
50%inclusion1 decks2 decks
47%synergy
Plague Myr
50%inclusion1 decks2 decks
49%synergy
Gray Merchant of Asphodel
50%inclusion1 decks2 decks
-0%synergy
Tangled Colony
50%inclusion1 decks2 decks
47%synergy
Phyrexian Obliterator
50%inclusion1 decks2 decks
39%synergy
Flensermite
50%inclusion1 decks2 decks
50%synergy
Pack Rat
50%inclusion1 decks2 decks
44%synergy
Throat Slitter
50%inclusion1 decks2 decks
48%synergy
Ink-Eyes, Servant of Oni
50%inclusion1 decks2 decks
47%synergy
Bilious Skulldweller
50%inclusion1 decks2 decks
49%synergy
Ichorclaw Myr
50%inclusion1 decks2 decks
50%synergy
Chittering Witch
50%inclusion1 decks2 decks
46%synergy
Voracious Vermin
50%inclusion1 decks2 decks
47%synergy
Valley Rotcaller
50%inclusion1 decks2 decks
47%synergy
Corpse Cur
50%inclusion1 decks2 decks
50%synergy
Phyrexian Crusader
50%inclusion1 decks2 decks
49%synergy
Ashcoat of the Shadow Swarm
50%inclusion1 decks2 decks
46%synergy
Yawgmoth, Thran Physician
50%inclusion1 decks2 decks
40%synergy
Crypt Ghast
50%inclusion1 decks2 decks
3%synergy
Piper of the Swarm
50%inclusion1 decks2 decks
43%synergy
Ratcatcher
50%inclusion1 decks2 decks
47%synergy
Flesh-Eater Imp
50%inclusion1 decks2 decks
49%synergy
K'rrik, Son of Yawgmoth
50%inclusion1 decks2 decks
31%synergy
Wave of Rats
50%inclusion1 decks2 decks
48%synergy
Skithiryx, the Blight Dragon
50%inclusion1 decks2 decks
49%synergy
Necropede
50%inclusion1 decks2 decks
50%synergy
Blightsteel Colossus
50%inclusion1 decks2 decks
49%synergy
Stronghold Rats
50%inclusion1 decks2 decks
47%synergy
Hand of the Praetors
50%inclusion1 decks2 decks
49%synergy
Lord Skitter, Sewer King
50%inclusion1 decks2 decks
42%synergy
Undercity Dire Rat
50%inclusion1 decks2 decks
48%synergy
Elephant-Rat
50%inclusion1 decks2 decks
50%synergy
Instants
Deadly Rollick
100%inclusion2 decks2 decks
74%synergy
Whisper of the Dross
100%inclusion2 decks2 decks
97%synergy
Vraska's Fall
100%inclusion2 decks2 decks
97%synergy
Grim Affliction
100%inclusion2 decks2 decks
98%synergy
Dark Ritual
100%inclusion2 decks2 decks
33%synergy
Cabal Ritual
100%inclusion2 decks2 decks
81%synergy
Fell the Profane
50%inclusion1 decks2 decks
30%synergy
Go for the Throat
50%inclusion1 decks2 decks
28%synergy
Rat Out
50%inclusion1 decks2 decks
49%synergy
Howl from Beyond
50%inclusion1 decks2 decks
49%synergy
Defile
50%inclusion1 decks2 decks
15%synergy
Bleed Dry
50%inclusion1 decks2 decks
50%synergy
Feed the Cycle
50%inclusion1 decks2 decks
49%synergy
Dismember
50%inclusion1 decks2 decks
40%synergy
Sephiroth's Intervention
50%inclusion1 decks2 decks
48%synergy
Sorceries
Diabolic Tutor
100%inclusion2 decks2 decks
86%synergy
Bubbling Muck
100%inclusion2 decks2 decks
84%synergy
Infectious Inquiry
100%inclusion2 decks2 decks
97%synergy
Drown in Ichor
100%inclusion2 decks2 decks
96%synergy
Vat Emergence
50%inclusion1 decks2 decks
49%synergy
Patriarch's Bidding
50%inclusion1 decks2 decks
46%synergy
Revenge of the Rats
50%inclusion1 decks2 decks
47%synergy
Phyresis Outbreak
50%inclusion1 decks2 decks
48%synergy
Feed the Swarm
50%inclusion1 decks2 decks
-0%synergy
Night's Whisper
50%inclusion1 decks2 decks
25%synergy
Exsanguinate
50%inclusion1 decks2 decks
25%synergy
Caress of Phyrexia
50%inclusion1 decks2 decks
49%synergy
Fell
50%inclusion1 decks2 decks
47%synergy
Reanimate
50%inclusion1 decks2 decks
9%synergy
The Black Breath
50%inclusion1 decks2 decks
49%synergy
Sign in Blood
50%inclusion1 decks2 decks
15%synergy
Kindred Dominance
50%inclusion1 decks2 decks
45%synergy
Behold the Sinister Six!
50%inclusion1 decks2 decks
49%synergy
Utility Artifacts
Bontu's Monument
100%inclusion2 decks2 decks
72%synergy
Jet Medallion
100%inclusion2 decks2 decks
38%synergy
The Darkness Crystal
100%inclusion2 decks2 decks
80%synergy
Lashwrithe
50%inclusion1 decks2 decks
46%synergy
Nightmare Lash
50%inclusion1 decks2 decks
48%synergy
Contagion Clasp
50%inclusion1 decks2 decks
48%synergy
Contagion Engine
50%inclusion1 decks2 decks
48%synergy
Sword of Truth and Justice
50%inclusion1 decks2 decks
49%synergy
Vanquisher's Banner
50%inclusion1 decks2 decks
46%synergy
Whispersilk Cloak
50%inclusion1 decks2 decks
44%synergy
Champion's Helm
50%inclusion1 decks2 decks
48%synergy
Swiftfoot Boots
50%inclusion1 decks2 decks
19%synergy
Commander's Plate
50%inclusion1 decks2 decks
44%synergy
Blackblade Reforged
50%inclusion1 decks2 decks
47%synergy
Grafted Exoskeleton
50%inclusion1 decks2 decks
49%synergy
Enchantments
Festering Wound
50%inclusion1 decks2 decks
50%synergy
Grasping Shadows
50%inclusion1 decks2 decks
50%synergy
Tribute to Horobi
50%inclusion1 decks2 decks
49%synergy
Call of the Ring
50%inclusion1 decks2 decks
48%synergy
Kaya's Ghostform
50%inclusion1 decks2 decks
40%synergy
Oubliette
50%inclusion1 decks2 decks
47%synergy
Leshrac's Rite
50%inclusion1 decks2 decks
50%synergy
Necrogen Communion
50%inclusion1 decks2 decks
48%synergy
Planeswalkers
Liliana of the Dark Realms
100%inclusion2 decks2 decks
86%synergy
Vraska, Betrayal's Sting
50%inclusion1 decks2 decks
47%synergy
Utility Lands
Bojuka Bog
100%inclusion2 decks2 decks
53%synergy
Karn's Bastion
100%inclusion2 decks2 decks
96%synergy
Shizo, Death's Storehouse
50%inclusion1 decks2 decks
40%synergy
Cabal Stronghold
50%inclusion1 decks2 decks
16%synergy
Swarmyard
50%inclusion1 decks2 decks
44%synergy
Crypt of Agadeem
50%inclusion1 decks2 decks
38%synergy
Inkmoth Nexus
50%inclusion1 decks2 decks
49%synergy
Witch's Cottage
50%inclusion1 decks2 decks
26%synergy
Cabal Coffers
50%inclusion1 decks2 decks
-5%synergy
Nykthos, Shrine to Nyx
50%inclusion1 decks2 decks
20%synergy
Mudflat Village
50%inclusion1 decks2 decks
47%synergy
Reliquary Tower
50%inclusion1 decks2 decks
21%synergy
Strip Mine
50%inclusion1 decks2 decks
47%synergy
Urborg, Tomb of Yawgmoth
50%inclusion1 decks2 decks
12%synergy
Mana Artifacts
Sol Ring
100%inclusion2 decks2 decks
15%synergy
The Soul Stone
100%inclusion2 decks2 decks
84%synergy
Arcane Signet
50%inclusion1 decks2 decks
-11%synergy
Charcoal Diamond
50%inclusion1 decks2 decks
28%synergy
Glistening Sphere
50%inclusion1 decks2 decks
49%synergy
Thought Vessel
50%inclusion1 decks2 decks
26%synergy
Lands
Swamp
100%inclusion2 decks2 decks
5%synergy
Fell the Profane
50%inclusion1 decks2 decks
30%synergy
Myriad Landscape
50%inclusion1 decks2 decks
26%synergy
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