Karumonix, the Rat King (Commander) - Budget Optimized

Karumonix, the Rat King
Rank #412
9decks
As CommanderAs CardAverage DeckDecks
Bracket
All1234
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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Sorceries
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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Piper of the Swarm
100%inclusion9 decks9 decks
93%synergy
Rancid Rats
89%inclusion8 decks9 decks
87%synergy
Voracious Vermin
89%inclusion8 decks9 decks
86%synergy
Ichor Rats
89%inclusion8 decks9 decks
86%synergy
Lord Skitter's Butcher
89%inclusion8 decks9 decks
86%synergy
Blightbelly Rat
89%inclusion8 decks9 decks
86%synergy
Necrogen Communion
78%inclusion7 decks9 decks
76%synergy
Infectious Inquiry
78%inclusion7 decks9 decks
75%synergy
Typhoid Rats
78%inclusion7 decks9 decks
74%synergy
Drown in Ichor
78%inclusion7 decks9 decks
74%synergy
Top Cards
Lord Skitter, Sewer King
78%inclusion7 decks9 decks
70%synergy
Crypt Rats
78%inclusion7 decks9 decks
74%synergy
Ogre Slumlord
78%inclusion7 decks9 decks
68%synergy
Burglar Rat
67%inclusion6 decks9 decks
56%synergy
Pack Rat
67%inclusion6 decks9 decks
61%synergy
Vraska's Fall
67%inclusion6 decks9 decks
64%synergy
Tangled Colony
67%inclusion6 decks9 decks
64%synergy
Rat Out
67%inclusion6 decks9 decks
65%synergy
Marrow-Gnawer
67%inclusion6 decks9 decks
63%synergy
Whisper of the Dross
67%inclusion6 decks9 decks
64%synergy
Game Changers
Bolas's Citadel
22%inclusion2 decks9 decks
-6%synergy
Demonic Tutor
22%inclusion2 decks9 decks
-5%synergy
Braids, Cabal Minion
22%inclusion2 decks9 decks
19%synergy
Opposition Agent
11%inclusion1 decks9 decks
2%synergy
Vampiric Tutor
11%inclusion1 decks9 decks
-10%synergy
Creatures
Chittering Skitterling
67%inclusion6 decks9 decks
66%synergy
Chittering Witch
67%inclusion6 decks9 decks
62%synergy
Ruin Rat
67%inclusion6 decks9 decks
65%synergy
Rat King, Pale Piper
60%inclusion3 decks5 decks
56%synergy
Ravenous Rats
56%inclusion5 decks9 decks
54%synergy
Engine Rat
56%inclusion5 decks9 decks
54%synergy
Nezumi Prowler
56%inclusion5 decks9 decks
54%synergy
Septic Rats
56%inclusion5 decks9 decks
54%synergy
Wave of Rats
56%inclusion5 decks9 decks
54%synergy
Stronghold Rats
56%inclusion5 decks9 decks
52%synergy
Rat Colony
56%inclusion5 decks9 decks
50%synergy
Persistent Marshstalker
44%inclusion4 decks9 decks
42%synergy
Swarm of Rats
44%inclusion4 decks9 decks
42%synergy
Pestilence Rats
44%inclusion4 decks9 decks
43%synergy
Gnat Miser
44%inclusion4 decks9 decks
42%synergy
Skullsnatcher
33%inclusion3 decks9 decks
33%synergy
Razortooth Rats
33%inclusion3 decks9 decks
33%synergy
Twisted Sewer-Witch
33%inclusion3 decks9 decks
32%synergy
Ashcoat of the Shadow Swarm
33%inclusion3 decks9 decks
30%synergy
Nezumi Cutthroat
33%inclusion3 decks9 decks
33%synergy
Nezumi Informant
33%inclusion3 decks9 decks
27%synergy
Ratcatcher
33%inclusion3 decks9 decks
30%synergy
Drainpipe Vermin
33%inclusion3 decks9 decks
32%synergy
Nashi, Moon Sage's Scion
33%inclusion3 decks9 decks
30%synergy
Bog Rats
22%inclusion2 decks9 decks
22%synergy
Mirkwood Bats
22%inclusion2 decks9 decks
14%synergy
Innocuous Rat
22%inclusion2 decks9 decks
21%synergy
Gnawing Vermin
22%inclusion2 decks9 decks
21%synergy
Daggerfang Duo
22%inclusion2 decks9 decks
22%synergy
Ink-Eyes, Servant of Oni
22%inclusion2 decks9 decks
19%synergy
Changeling Outcast
22%inclusion2 decks9 decks
17%synergy
Crackdown Construct
22%inclusion2 decks9 decks
22%synergy
Nezumi Bone-Reader
22%inclusion2 decks9 decks
21%synergy
Gulping Scraptrap
22%inclusion2 decks9 decks
22%synergy
Arnyn, Deathbloom Botanist
20%inclusion1 decks5 decks
18%synergy
Cheerful Osteomancer
20%inclusion1 decks5 decks
19%synergy
Rat King, Verminister
17%inclusion1 decks6 decks
13%synergy
Elephant-Rat
13%inclusion1 decks8 decks
12%synergy
Phyrexian Juggernaut
11%inclusion1 decks9 decks
11%synergy
Refurbished Familiar
11%inclusion1 decks9 decks
9%synergy
Plague Stinger
11%inclusion1 decks9 decks
10%synergy
Chittering Rats
11%inclusion1 decks9 decks
11%synergy
Nezumi Ronin
11%inclusion1 decks9 decks
11%synergy
Dread Presence
11%inclusion1 decks9 decks
-2%synergy
Carrion Rats
11%inclusion1 decks9 decks
11%synergy
Gutter Skulk
11%inclusion1 decks9 decks
11%synergy
Rotting Rats
11%inclusion1 decks9 decks
8%synergy
Diamond Knight
11%inclusion1 decks9 decks
11%synergy
Priest of Forgotten Gods
11%inclusion1 decks9 decks
2%synergy
Morbid Opportunist
11%inclusion1 decks9 decks
-13%synergy
Instants
Grim Affliction
56%inclusion5 decks9 decks
54%synergy
Go for the Throat
44%inclusion4 decks9 decks
22%synergy
Dark Ritual
44%inclusion4 decks9 decks
-23%synergy
Village Rites
33%inclusion3 decks9 decks
8%synergy
Consuming Corruption
33%inclusion3 decks9 decks
18%synergy
Defile
33%inclusion3 decks9 decks
-2%synergy
Murder
33%inclusion3 decks9 decks
24%synergy
Corrupted Conviction
33%inclusion3 decks9 decks
21%synergy
Deadly Rollick
22%inclusion2 decks9 decks
-4%synergy
Infernal Grasp
22%inclusion2 decks9 decks
-3%synergy
Tragic Slip
22%inclusion2 decks9 decks
4%synergy
Zuko's Conviction
14%inclusion1 decks7 decks
14%synergy
The Spot's Portal
13%inclusion1 decks8 decks
12%synergy
Hero's Downfall
11%inclusion1 decks9 decks
5%synergy
Mausoleum Secrets
11%inclusion1 decks9 decks
9%synergy
Finishing Blow
11%inclusion1 decks9 decks
11%synergy
Undying Evil
11%inclusion1 decks9 decks
8%synergy
Anoint with Affliction
11%inclusion1 decks9 decks
11%synergy
Deadly Dispute
11%inclusion1 decks9 decks
-16%synergy
Price of Fame
11%inclusion1 decks9 decks
10%synergy
Virulent Wound
11%inclusion1 decks9 decks
11%synergy
Bitter Triumph
11%inclusion1 decks9 decks
1%synergy
Raise the Draugr
11%inclusion1 decks9 decks
10%synergy
Undying Malice
11%inclusion1 decks9 decks
1%synergy
Death Denied
11%inclusion1 decks9 decks
10%synergy
Tainted Strike
11%inclusion1 decks9 decks
8%synergy
Foul-Tongue Shriek
11%inclusion1 decks9 decks
9%synergy
Unseal the Necropolis
11%inclusion1 decks9 decks
10%synergy
Butcher's Glee
11%inclusion1 decks9 decks
11%synergy
Offer Immortality
11%inclusion1 decks9 decks
9%synergy
Alesha's Legacy
11%inclusion1 decks9 decks
10%synergy
Lethal Scheme
11%inclusion1 decks9 decks
8%synergy
Gravepurge
11%inclusion1 decks9 decks
10%synergy
Touch of Moonglove
11%inclusion1 decks9 decks
11%synergy
Ultimate Price
11%inclusion1 decks9 decks
11%synergy
Live or Die
11%inclusion1 decks9 decks
11%synergy
Maximum Overdrive
11%inclusion1 decks9 decks
10%synergy
Desperate Measures
11%inclusion1 decks9 decks
11%synergy
Early Winter
11%inclusion1 decks9 decks
11%synergy
Sorceries
Vat Emergence
56%inclusion5 decks9 decks
54%synergy
Revenge of the Rats
56%inclusion5 decks9 decks
52%synergy
Crippling Fear
56%inclusion5 decks9 decks
53%synergy
Sign in Blood
44%inclusion4 decks9 decks
10%synergy
Spread the Sickness
33%inclusion3 decks9 decks
33%synergy
Feed the Infection
33%inclusion3 decks9 decks
33%synergy
Feed the Swarm
33%inclusion3 decks9 decks
-17%synergy
Night's Whisper
33%inclusion3 decks9 decks
8%synergy
Patriarch's Bidding
22%inclusion2 decks9 decks
18%synergy
Phyresis Outbreak
22%inclusion2 decks9 decks
21%synergy
Read the Bones
22%inclusion2 decks9 decks
7%synergy
Mutilate
22%inclusion2 decks9 decks
7%synergy
Lab Rats
22%inclusion2 decks9 decks
22%synergy
Gruesome Fate
22%inclusion2 decks9 decks
20%synergy
Send in the Pest
20%inclusion1 decks5 decks
18%synergy
Darkness Descends
17%inclusion1 decks6 decks
16%synergy
Deadly Precision
14%inclusion1 decks7 decks
13%synergy
Increasing Ambition
11%inclusion1 decks9 decks
11%synergy
Stench of Evil
11%inclusion1 decks9 decks
11%synergy
Diabolic Tutor
11%inclusion1 decks9 decks
-2%synergy
Peer into the Abyss
11%inclusion1 decks9 decks
1%synergy
Break the Ice
11%inclusion1 decks9 decks
11%synergy
Profane Tutor
11%inclusion1 decks9 decks
7%synergy
Nightmare Unmaking
11%inclusion1 decks9 decks
11%synergy
March of the Returned
11%inclusion1 decks9 decks
11%synergy
Soul Salvage
11%inclusion1 decks9 decks
11%synergy
Lash of the Balrog
11%inclusion1 decks9 decks
10%synergy
Death Cloud
11%inclusion1 decks9 decks
9%synergy
Bone Shards
11%inclusion1 decks9 decks
8%synergy
Smallpox
11%inclusion1 decks9 decks
6%synergy
Buried Alive
11%inclusion1 decks9 decks
-2%synergy
Caress of Phyrexia
11%inclusion1 decks9 decks
11%synergy
Stronghold Discipline
11%inclusion1 decks9 decks
11%synergy
Swallowing Plague
11%inclusion1 decks9 decks
11%synergy
Unburden
11%inclusion1 decks9 decks
11%synergy
Final Parting
11%inclusion1 decks9 decks
7%synergy
Annihilating Glare
11%inclusion1 decks9 decks
10%synergy
Toxic Deluge
11%inclusion1 decks9 decks
-26%synergy
Geth's Summons
11%inclusion1 decks9 decks
11%synergy
Dutiful Return
11%inclusion1 decks9 decks
11%synergy
Kindred Dominance
11%inclusion1 decks9 decks
6%synergy
Final Vengeance
11%inclusion1 decks9 decks
10%synergy
Syphon Soul
11%inclusion1 decks9 decks
10%synergy
Damnation
11%inclusion1 decks9 decks
-9%synergy
Let's Play a Game
11%inclusion1 decks9 decks
9%synergy
Epic Downfall
11%inclusion1 decks9 decks
11%synergy
Plague of Vermin
11%inclusion1 decks9 decks
9%synergy
Pact of the Serpent
11%inclusion1 decks9 decks
10%synergy
Utility Artifacts
Bontu's Monument
56%inclusion5 decks9 decks
28%synergy
Contagion Clasp
44%inclusion4 decks9 decks
42%synergy
Vanquisher's Banner
44%inclusion4 decks9 decks
41%synergy
Herald's Horn
44%inclusion4 decks9 decks
39%synergy
Thornbite Staff
44%inclusion4 decks9 decks
42%synergy
Icon of Ancestry
33%inclusion3 decks9 decks
32%synergy
Wayfarer's Bauble
22%inclusion2 decks9 decks
8%synergy
Contagion Engine
22%inclusion2 decks9 decks
21%synergy
Skullclamp
22%inclusion2 decks9 decks
-0%synergy
Hall of Triumph
22%inclusion2 decks9 decks
22%synergy
Jet Medallion
22%inclusion2 decks9 decks
-40%synergy
Swiftfoot Boots
22%inclusion2 decks9 decks
-9%synergy
Demon's Horn
22%inclusion2 decks9 decks
18%synergy
Vat of Rebirth
11%inclusion1 decks9 decks
8%synergy
Skeleton Key
11%inclusion1 decks9 decks
11%synergy
Coat of Arms
11%inclusion1 decks9 decks
9%synergy
Mishra's Bauble
11%inclusion1 decks9 decks
10%synergy
Thieves' Tools
11%inclusion1 decks9 decks
9%synergy
Prosthetic Injector
11%inclusion1 decks9 decks
11%synergy
Expedition Map
11%inclusion1 decks9 decks
0%synergy
Sinister Monolith
11%inclusion1 decks9 decks
10%synergy
Mindcrank
11%inclusion1 decks9 decks
6%synergy
Enchantments
Bad Moon
44%inclusion4 decks9 decks
41%synergy
Oversold Cemetery
33%inclusion3 decks9 decks
28%synergy
Phyrexian Arena
33%inclusion3 decks9 decks
-6%synergy
Black Market
22%inclusion2 decks9 decks
2%synergy
Phyresis
22%inclusion2 decks9 decks
20%synergy
Lord Skitter's Blessing
22%inclusion2 decks9 decks
22%synergy
Cover of Darkness
22%inclusion2 decks9 decks
19%synergy
Nest of Scarabs
11%inclusion1 decks9 decks
8%synergy
Greed
11%inclusion1 decks9 decks
5%synergy
Blowfly Infestation
11%inclusion1 decks9 decks
9%synergy
Contamination
11%inclusion1 decks9 decks
8%synergy
Cracked Skull
11%inclusion1 decks9 decks
11%synergy
Contaminated Ground
11%inclusion1 decks9 decks
11%synergy
Contaminated Bond
11%inclusion1 decks9 decks
11%synergy
Phyrexian Reclamation
11%inclusion1 decks9 decks
1%synergy
Sporogenic Infection
11%inclusion1 decks9 decks
11%synergy
Vampiric Rites
11%inclusion1 decks9 decks
5%synergy
Relic Putrescence
11%inclusion1 decks9 decks
11%synergy
Quest for the Nihil Stone
11%inclusion1 decks9 decks
9%synergy
Underworld Dreams
11%inclusion1 decks9 decks
5%synergy
Eternal Thirst
11%inclusion1 decks9 decks
9%synergy
Funeral Room // Awakening Hall
11%inclusion1 decks9 decks
7%synergy
Screams from Within
11%inclusion1 decks9 decks
11%synergy
Painful Quandary
11%inclusion1 decks9 decks
1%synergy
Bloodchief Ascension
11%inclusion1 decks9 decks
2%synergy
Planeswalkers
Vraska, Betrayal's Sting
33%inclusion3 decks9 decks
31%synergy
Liliana of the Dark Realms
11%inclusion1 decks9 decks
-2%synergy
Utility Lands
Bojuka Bog
78%inclusion7 decks9 decks
30%synergy
Mudflat Village
44%inclusion4 decks9 decks
42%synergy
Swarmyard
33%inclusion3 decks9 decks
28%synergy
Witch's Cottage
33%inclusion3 decks9 decks
9%synergy
Karn's Bastion
33%inclusion3 decks9 decks
30%synergy
Rogue's Passage
33%inclusion3 decks9 decks
14%synergy
Mortuary Mire
22%inclusion2 decks9 decks
9%synergy
Cabal Coffers
22%inclusion2 decks9 decks
-33%synergy
Vault of Whispers
11%inclusion1 decks9 decks
6%synergy
Barren Moor
11%inclusion1 decks9 decks
2%synergy
Blast Zone
11%inclusion1 decks9 decks
9%synergy
Reliquary Tower
11%inclusion1 decks9 decks
-18%synergy
Drownyard Temple
11%inclusion1 decks9 decks
10%synergy
Temple of the False God
11%inclusion1 decks9 decks
4%synergy
Mana Artifacts
Sol Ring
89%inclusion8 decks9 decks
4%synergy
Arcane Signet
56%inclusion5 decks9 decks
-6%synergy
Charcoal Diamond
22%inclusion2 decks9 decks
1%synergy
Glistening Sphere
22%inclusion2 decks9 decks
21%synergy
Mind Stone
22%inclusion2 decks9 decks
-5%synergy
Everflowing Chalice
11%inclusion1 decks9 decks
6%synergy
Heraldic Banner
11%inclusion1 decks9 decks
6%synergy
Patchwork Banner
11%inclusion1 decks9 decks
7%synergy
Fellwar Stone
11%inclusion1 decks9 decks
-3%synergy
Thought Vessel
11%inclusion1 decks9 decks
-13%synergy
Gilded Lotus
11%inclusion1 decks9 decks
6%synergy
Worn Powerstone
11%inclusion1 decks9 decks
7%synergy
Phyrexian Atlas
11%inclusion1 decks9 decks
11%synergy
Prismatic Lens
11%inclusion1 decks9 decks
9%synergy
Lands
Swamp
100%inclusion9 decks9 decks
5%synergy
Path of Ancestry
33%inclusion3 decks9 decks
28%synergy
Command Tower
22%inclusion2 decks9 decks
16%synergy
Terramorphic Expanse
22%inclusion2 decks9 decks
19%synergy
Big Apple, 3 a.m.
20%inclusion1 decks5 decks
18%synergy
Myriad Landscape
11%inclusion1 decks9 decks
-13%synergy
Secluded Courtyard
11%inclusion1 decks9 decks
11%synergy
Evolving Wilds
11%inclusion1 decks9 decks
7%synergy
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