Karumonix, the Rat King (Commander) - Expensive Optimized

Karumonix, the Rat King
Rank #381
6decks
As CommanderAs CardAverage DeckDecks
Bracket
All12345
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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Utility Lands
Mana Artifacts
Lands
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Swarmyard
100%inclusion6 decks6 decks
94%synergy
Marrow-Gnawer
83%inclusion5 decks6 decks
80%synergy
Ashcoat of the Shadow Swarm
83%inclusion5 decks6 decks
80%synergy
Piper of the Swarm
83%inclusion5 decks6 decks
76%synergy
Phyresis Outbreak
67%inclusion4 decks6 decks
65%synergy
Ichor Rats
67%inclusion4 decks6 decks
64%synergy
Ratcatcher
67%inclusion4 decks6 decks
63%synergy
Blightbelly Rat
67%inclusion4 decks6 decks
63%synergy
Thrumming Stone
67%inclusion4 decks6 decks
63%synergy
Urborg, Tomb of Yawgmoth
100%inclusion6 decks6 decks
62%synergy
Top Cards
Dark Ritual
100%inclusion6 decks6 decks
33%synergy
Deadly Rollick
83%inclusion5 decks6 decks
59%synergy
Ogre Slumlord
67%inclusion4 decks6 decks
57%synergy
Grim Tutor
67%inclusion4 decks6 decks
55%synergy
Rat Colony
67%inclusion4 decks6 decks
61%synergy
Phyrexian Arena
67%inclusion4 decks6 decks
27%synergy
Game Changers
Imperial Seal
100%inclusion6 decks6 decks
93%synergy
Demonic Tutor
100%inclusion6 decks6 decks
73%synergy
Vampiric Tutor
100%inclusion6 decks6 decks
79%synergy
Ancient Tomb
67%inclusion4 decks6 decks
55%synergy
Bolas's Citadel
67%inclusion4 decks6 decks
38%synergy
Mana Vault
67%inclusion4 decks6 decks
60%synergy
Mox Diamond
67%inclusion4 decks6 decks
63%synergy
Chrome Mox
67%inclusion4 decks6 decks
61%synergy
Opposition Agent
33%inclusion2 decks6 decks
24%synergy
The One Ring
33%inclusion2 decks6 decks
24%synergy
Creatures
Ayara, First of Locthwain
50%inclusion3 decks6 decks
24%synergy
Lord Skitter, Sewer King
50%inclusion3 decks6 decks
42%synergy
Tangled Colony
33%inclusion2 decks6 decks
30%synergy
Lord Skitter's Butcher
33%inclusion2 decks6 decks
30%synergy
Pack Rat
33%inclusion2 decks6 decks
27%synergy
Chittering Witch
33%inclusion2 decks6 decks
29%synergy
Gnat Miser
33%inclusion2 decks6 decks
30%synergy
Nashi, Moon Sage's Scion
33%inclusion2 decks6 decks
29%synergy
Locust Miser
33%inclusion2 decks6 decks
32%synergy
Dauthi Voidwalker
33%inclusion2 decks6 decks
18%synergy
Crypt Rats
17%inclusion1 decks6 decks
12%synergy
Hoarding Broodlord
17%inclusion1 decks6 decks
12%synergy
Relentless Rats
17%inclusion1 decks6 decks
15%synergy
Blood Artist
17%inclusion1 decks6 decks
-15%synergy
Crashing Drawbridge
17%inclusion1 decks6 decks
14%synergy
Ruthless Radrat
17%inclusion1 decks6 decks
16%synergy
Roaming Throne
17%inclusion1 decks6 decks
14%synergy
Sheoldred, the Apocalypse
17%inclusion1 decks6 decks
2%synergy
Defiler of Flesh
17%inclusion1 decks6 decks
13%synergy
Mogis's Marauder
17%inclusion1 decks6 decks
16%synergy
Voracious Vermin
17%inclusion1 decks6 decks
14%synergy
Crypt Ghast
17%inclusion1 decks6 decks
-31%synergy
Ophiomancer
17%inclusion1 decks6 decks
0%synergy
Throat Slitter
17%inclusion1 decks6 decks
15%synergy
K'rrik, Son of Yawgmoth
17%inclusion1 decks6 decks
-2%synergy
Septic Rats
17%inclusion1 decks6 decks
15%synergy
Wave of Rats
17%inclusion1 decks6 decks
15%synergy
Skithiryx, the Blight Dragon
17%inclusion1 decks6 decks
15%synergy
Rancid Rats
17%inclusion1 decks6 decks
14%synergy
Zulaport Cutthroat
17%inclusion1 decks6 decks
-7%synergy
Old Flitterfang
17%inclusion1 decks6 decks
15%synergy
Twisted Sewer-Witch
17%inclusion1 decks6 decks
15%synergy
Yawgmoth, Thran Physician
17%inclusion1 decks6 decks
7%synergy
Orcish Bowmasters
17%inclusion1 decks6 decks
3%synergy
Instants
Culling the Weak
50%inclusion3 decks6 decks
34%synergy
Vraska's Fall
50%inclusion3 decks6 decks
47%synergy
Village Rites
33%inclusion2 decks6 decks
8%synergy
Cabal Ritual
33%inclusion2 decks6 decks
15%synergy
Ad Nauseam
33%inclusion2 decks6 decks
31%synergy
Force of Despair
17%inclusion1 decks6 decks
9%synergy
Whisper of the Dross
17%inclusion1 decks6 decks
14%synergy
Entomb
17%inclusion1 decks6 decks
5%synergy
Imp's Mischief
17%inclusion1 decks6 decks
-8%synergy
Deadly Dispute
17%inclusion1 decks6 decks
-9%synergy
Defile
17%inclusion1 decks6 decks
-20%synergy
Murder
17%inclusion1 decks6 decks
7%synergy
Infernal Grasp
17%inclusion1 decks6 decks
-9%synergy
Foul-Tongue Shriek
17%inclusion1 decks6 decks
15%synergy
Corrupted Conviction
17%inclusion1 decks6 decks
4%synergy
Saw in Half
17%inclusion1 decks6 decks
8%synergy
Nasty End
17%inclusion1 decks6 decks
13%synergy
Tragic Slip
17%inclusion1 decks6 decks
-3%synergy
Malakir Rebirth
17%inclusion1 decks6 decks
-6%synergy
Sorceries
Day of Black Sun
100%inclusion1 decks1 decks
98%synergy
Bloodline Bidding
100%inclusion1 decks1 decks
95%synergy
Diabolic Intent
50%inclusion3 decks6 decks
35%synergy
Drown in Ichor
50%inclusion3 decks6 decks
46%synergy
Reanimate
50%inclusion3 decks6 decks
10%synergy
Infectious Inquiry
33%inclusion2 decks6 decks
31%synergy
Kindred Dominance
33%inclusion2 decks6 decks
29%synergy
Plague of Vermin
33%inclusion2 decks6 decks
31%synergy
Toxic Deluge
33%inclusion2 decks6 decks
-3%synergy
Diabolic Tutor
17%inclusion1 decks6 decks
2%synergy
Revenge of the Rats
17%inclusion1 decks6 decks
14%synergy
Forever Young
17%inclusion1 decks6 decks
15%synergy
Victimize
17%inclusion1 decks6 decks
-10%synergy
Feed the Swarm
17%inclusion1 decks6 decks
-34%synergy
Sinkhole
17%inclusion1 decks6 decks
16%synergy
Read the Bones
17%inclusion1 decks6 decks
0%synergy
Mutilate
17%inclusion1 decks6 decks
0%synergy
Night's Whisper
17%inclusion1 decks6 decks
-8%synergy
Caress of Phyrexia
17%inclusion1 decks6 decks
16%synergy
Feed the Infection
17%inclusion1 decks6 decks
16%synergy
Living Death
17%inclusion1 decks6 decks
7%synergy
Sign in Blood
17%inclusion1 decks6 decks
-19%synergy
Damnation
17%inclusion1 decks6 decks
-4%synergy
Rise of the Dark Realms
17%inclusion1 decks6 decks
4%synergy
Secret Salvage
17%inclusion1 decks6 decks
15%synergy
Utility Artifacts
Chronicle of Victory
100%inclusion1 decks1 decks
97%synergy
Bontu's Monument
50%inclusion3 decks6 decks
22%synergy
Jet Medallion
50%inclusion3 decks6 decks
-12%synergy
Sensei's Divining Top
33%inclusion2 decks6 decks
25%synergy
Aetherflux Reservoir
33%inclusion2 decks6 decks
24%synergy
Swiftfoot Boots
33%inclusion2 decks6 decks
2%synergy
Lightning Greaves
33%inclusion2 decks6 decks
0%synergy
The Darkness Crystal
25%inclusion1 decks4 decks
5%synergy
Defense Grid
17%inclusion1 decks6 decks
14%synergy
Cloud Key
17%inclusion1 decks6 decks
15%synergy
Oblivion Stone
17%inclusion1 decks6 decks
16%synergy
Wayfarer's Bauble
17%inclusion1 decks6 decks
1%synergy
Contagion Clasp
17%inclusion1 decks6 decks
14%synergy
Contagion Engine
17%inclusion1 decks6 decks
15%synergy
Ashnod's Altar
17%inclusion1 decks6 decks
-3%synergy
Skullclamp
17%inclusion1 decks6 decks
-5%synergy
Shadowspear
17%inclusion1 decks6 decks
13%synergy
Banner of Kinship
17%inclusion1 decks6 decks
14%synergy
Vanquisher's Banner
17%inclusion1 decks6 decks
13%synergy
Coat of Arms
17%inclusion1 decks6 decks
14%synergy
Nim Deathmantle
17%inclusion1 decks6 decks
14%synergy
Sword of the Paruns
17%inclusion1 decks6 decks
16%synergy
Grafted Exoskeleton
17%inclusion1 decks6 decks
16%synergy
Door of Destinies
17%inclusion1 decks6 decks
14%synergy
Tarrian's Journal
17%inclusion1 decks6 decks
15%synergy
Herald's Horn
17%inclusion1 decks6 decks
11%synergy
Altar of the Brood
17%inclusion1 decks6 decks
15%synergy
Thornbite Staff
17%inclusion1 decks6 decks
14%synergy
Basilisk Collar
17%inclusion1 decks6 decks
14%synergy
Enchantments
Animate Dead
50%inclusion3 decks6 decks
33%synergy
The Meathook Massacre
33%inclusion2 decks6 decks
16%synergy
Black Market
33%inclusion2 decks6 decks
12%synergy
Contamination
33%inclusion2 decks6 decks
30%synergy
Grave Pact
33%inclusion2 decks6 decks
14%synergy
Black Market Connections
33%inclusion2 decks6 decks
9%synergy
Oversold Cemetery
33%inclusion2 decks6 decks
28%synergy
Necrogen Communion
33%inclusion2 decks6 decks
32%synergy
Case of the Stashed Skeleton
17%inclusion1 decks6 decks
15%synergy
Haunted One
17%inclusion1 decks6 decks
14%synergy
Dictate of Erebos
17%inclusion1 decks6 decks
6%synergy
Tribute to Horobi
17%inclusion1 decks6 decks
16%synergy
Carnival of Souls
17%inclusion1 decks6 decks
16%synergy
No Mercy
17%inclusion1 decks6 decks
9%synergy
Cover of Darkness
17%inclusion1 decks6 decks
14%synergy
Bad Moon
17%inclusion1 decks6 decks
13%synergy
Phyresis
17%inclusion1 decks6 decks
15%synergy
Bitterblossom
17%inclusion1 decks6 decks
3%synergy
Planeswalkers
Vraska, Betrayal's Sting
50%inclusion3 decks6 decks
47%synergy
Ugin, the Spirit Dragon
17%inclusion1 decks6 decks
16%synergy
Karn, the Great Creator
17%inclusion1 decks6 decks
16%synergy
Utility Lands
Realm of Koh
100%inclusion1 decks1 decks
97%synergy
Cabal Coffers
83%inclusion5 decks6 decks
29%synergy
Bojuka Bog
67%inclusion4 decks6 decks
20%synergy
Phyrexian Tower
67%inclusion4 decks6 decks
41%synergy
Nykthos, Shrine to Nyx
50%inclusion3 decks6 decks
20%synergy
Karn's Bastion
50%inclusion3 decks6 decks
46%synergy
Mudflat Village
50%inclusion3 decks6 decks
47%synergy
Three Tree City
50%inclusion3 decks6 decks
45%synergy
Volrath's Stronghold
33%inclusion2 decks6 decks
30%synergy
Cabal Stronghold
17%inclusion1 decks6 decks
-18%synergy
Mortuary Mire
17%inclusion1 decks6 decks
4%synergy
Boseiju, Who Shelters All
17%inclusion1 decks6 decks
15%synergy
Vesuva
17%inclusion1 decks6 decks
14%synergy
Mutavault
17%inclusion1 decks6 decks
16%synergy
Witch's Cottage
17%inclusion1 decks6 decks
-8%synergy
Emergence Zone
17%inclusion1 decks6 decks
13%synergy
Urza's Saga
17%inclusion1 decks6 decks
9%synergy
Reliquary Tower
17%inclusion1 decks6 decks
-14%synergy
Field of the Dead
17%inclusion1 decks6 decks
15%synergy
Takenuma, Abandoned Mire
17%inclusion1 decks6 decks
1%synergy
Castle Locthwain
17%inclusion1 decks6 decks
0%synergy
Strip Mine
17%inclusion1 decks6 decks
14%synergy
Mana Artifacts
Sol Ring
83%inclusion5 decks6 decks
-2%synergy
Arcane Signet
67%inclusion4 decks6 decks
5%synergy
Lotus Petal
33%inclusion2 decks6 decks
26%synergy
Staff of Compleation
17%inclusion1 decks6 decks
15%synergy
Caged Sun
17%inclusion1 decks6 decks
5%synergy
Grim Monolith
17%inclusion1 decks6 decks
14%synergy
Glistening Sphere
17%inclusion1 decks6 decks
15%synergy
Throne of Eldraine
17%inclusion1 decks6 decks
7%synergy
Mox Amber
17%inclusion1 decks6 decks
12%synergy
Patchwork Banner
17%inclusion1 decks6 decks
12%synergy
Mox Opal
17%inclusion1 decks6 decks
13%synergy
Lands
Swamp
83%inclusion5 decks6 decks
-12%synergy
Cavern of Souls
50%inclusion3 decks6 decks
43%synergy
Command Tower
17%inclusion1 decks6 decks
11%synergy
Exotic Orchard
17%inclusion1 decks6 decks
15%synergy
Unclaimed Territory
17%inclusion1 decks6 decks
17%synergy
Reflecting Pool
17%inclusion1 decks6 decks
17%synergy
Path of Ancestry
17%inclusion1 decks6 decks
12%synergy
Gemstone Caverns
17%inclusion1 decks6 decks
12%synergy
Malakir Rebirth
17%inclusion1 decks6 decks
-6%synergy
Snow-Covered Swamp
17%inclusion1 decks6 decks
10%synergy
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