Karumonix, the Rat King (Commander) - Expensive Optimized

Karumonix, the Rat King
Rank #393
7decks
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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Enchantments
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Utility Lands
Mana Artifacts
Lands
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Swarmyard
100%inclusion7 decks7 decks
94%synergy
Marrow-Gnawer
86%inclusion6 decks7 decks
82%synergy
Ashcoat of the Shadow Swarm
86%inclusion6 decks7 decks
82%synergy
Phyresis Outbreak
71%inclusion5 decks7 decks
70%synergy
Ichor Rats
71%inclusion5 decks7 decks
69%synergy
Blightbelly Rat
71%inclusion5 decks7 decks
68%synergy
Thrumming Stone
71%inclusion5 decks7 decks
67%synergy
Rat Colony
71%inclusion5 decks7 decks
66%synergy
Piper of the Swarm
71%inclusion5 decks7 decks
64%synergy
Urborg, Tomb of Yawgmoth
100%inclusion7 decks7 decks
62%synergy
Top Cards
Dark Ritual
100%inclusion7 decks7 decks
33%synergy
Deadly Rollick
86%inclusion6 decks7 decks
61%synergy
Diabolic Intent
57%inclusion4 decks7 decks
42%synergy
Vraska's Fall
57%inclusion4 decks7 decks
54%synergy
Ratcatcher
57%inclusion4 decks7 decks
54%synergy
Grim Tutor
57%inclusion4 decks7 decks
46%synergy
Phyrexian Arena
57%inclusion4 decks7 decks
18%synergy
Lord Skitter, Sewer King
57%inclusion4 decks7 decks
49%synergy
Ogre Slumlord
57%inclusion4 decks7 decks
47%synergy
Jet Medallion
57%inclusion4 decks7 decks
-5%synergy
Game Changers
Imperial Seal
100%inclusion7 decks7 decks
93%synergy
Demonic Tutor
100%inclusion7 decks7 decks
73%synergy
Vampiric Tutor
100%inclusion7 decks7 decks
79%synergy
Chrome Mox
71%inclusion5 decks7 decks
65%synergy
Mana Vault
71%inclusion5 decks7 decks
65%synergy
Ancient Tomb
71%inclusion5 decks7 decks
60%synergy
Bolas's Citadel
57%inclusion4 decks7 decks
29%synergy
Mox Diamond
57%inclusion4 decks7 decks
53%synergy
The One Ring
43%inclusion3 decks7 decks
34%synergy
Opposition Agent
29%inclusion2 decks7 decks
19%synergy
Creatures
Rat King, Pale Piper
50%inclusion1 decks2 decks
46%synergy
Rat King, Verminister
50%inclusion1 decks2 decks
47%synergy
Ayara, First of Locthwain
43%inclusion3 decks7 decks
17%synergy
Crashing Drawbridge
29%inclusion2 decks7 decks
26%synergy
Tangled Colony
29%inclusion2 decks7 decks
25%synergy
Lord Skitter's Butcher
29%inclusion2 decks7 decks
25%synergy
Locust Miser
29%inclusion2 decks7 decks
27%synergy
Gnat Miser
29%inclusion2 decks7 decks
26%synergy
Skithiryx, the Blight Dragon
29%inclusion2 decks7 decks
27%synergy
Dauthi Voidwalker
29%inclusion2 decks7 decks
13%synergy
Pack Rat
29%inclusion2 decks7 decks
23%synergy
Septic Rats
29%inclusion2 decks7 decks
27%synergy
Chittering Witch
29%inclusion2 decks7 decks
24%synergy
Yawgmoth, Thran Physician
29%inclusion2 decks7 decks
19%synergy
Nashi, Moon Sage's Scion
29%inclusion2 decks7 decks
25%synergy
Hoarding Broodlord
14%inclusion1 decks7 decks
10%synergy
Plague Myr
14%inclusion1 decks7 decks
13%synergy
Roaming Throne
14%inclusion1 decks7 decks
11%synergy
Throat Slitter
14%inclusion1 decks7 decks
12%synergy
Twisted Sewer-Witch
14%inclusion1 decks7 decks
13%synergy
Crypt Ghast
14%inclusion1 decks7 decks
-33%synergy
Rancid Rats
14%inclusion1 decks7 decks
12%synergy
Orcish Bowmasters
14%inclusion1 decks7 decks
1%synergy
Old Flitterfang
14%inclusion1 decks7 decks
13%synergy
Crypt Rats
14%inclusion1 decks7 decks
10%synergy
Sheoldred, the Apocalypse
14%inclusion1 decks7 decks
-0%synergy
Filth
14%inclusion1 decks7 decks
12%synergy
Ophiomancer
14%inclusion1 decks7 decks
-3%synergy
Phyrexian Crusader
14%inclusion1 decks7 decks
13%synergy
Plague Stinger
14%inclusion1 decks7 decks
13%synergy
Relentless Rats
14%inclusion1 decks7 decks
13%synergy
Blood Artist
14%inclusion1 decks7 decks
-18%synergy
Ruthless Radrat
14%inclusion1 decks7 decks
14%synergy
Defiler of Flesh
14%inclusion1 decks7 decks
10%synergy
Zulaport Cutthroat
14%inclusion1 decks7 decks
-9%synergy
Mogis's Marauder
14%inclusion1 decks7 decks
13%synergy
Voracious Vermin
14%inclusion1 decks7 decks
11%synergy
K'rrik, Son of Yawgmoth
14%inclusion1 decks7 decks
-5%synergy
Wave of Rats
14%inclusion1 decks7 decks
13%synergy
Instants
Culling the Weak
43%inclusion3 decks7 decks
26%synergy
Cabal Ritual
29%inclusion2 decks7 decks
10%synergy
Malakir Rebirth
29%inclusion2 decks7 decks
5%synergy
Village Rites
29%inclusion2 decks7 decks
3%synergy
Entomb
29%inclusion2 decks7 decks
16%synergy
Imp's Mischief
29%inclusion2 decks7 decks
4%synergy
Ad Nauseam
29%inclusion2 decks7 decks
26%synergy
Fell the Profane
14%inclusion1 decks7 decks
-5%synergy
Hatred
14%inclusion1 decks7 decks
13%synergy
Deadly Dispute
14%inclusion1 decks7 decks
-12%synergy
Infernal Grasp
14%inclusion1 decks7 decks
-11%synergy
Tainted Strike
14%inclusion1 decks7 decks
11%synergy
Foul-Tongue Shriek
14%inclusion1 decks7 decks
12%synergy
Corrupted Conviction
14%inclusion1 decks7 decks
2%synergy
Nasty End
14%inclusion1 decks7 decks
11%synergy
Force of Despair
14%inclusion1 decks7 decks
7%synergy
Whisper of the Dross
14%inclusion1 decks7 decks
12%synergy
Defile
14%inclusion1 decks7 decks
-22%synergy
Saw in Half
14%inclusion1 decks7 decks
6%synergy
Tragic Slip
14%inclusion1 decks7 decks
-5%synergy
Snuff Out
14%inclusion1 decks7 decks
1%synergy
Murder
14%inclusion1 decks7 decks
4%synergy
Sorceries
Day of Black Sun
50%inclusion1 decks2 decks
48%synergy
Bloodline Bidding
50%inclusion1 decks2 decks
46%synergy
Reanimate
43%inclusion3 decks7 decks
3%synergy
Toxic Deluge
43%inclusion3 decks7 decks
6%synergy
Infectious Inquiry
43%inclusion3 decks7 decks
40%synergy
Drown in Ichor
43%inclusion3 decks7 decks
39%synergy
Feed the Swarm
29%inclusion2 decks7 decks
-22%synergy
Plague of Vermin
29%inclusion2 decks7 decks
26%synergy
Kindred Dominance
29%inclusion2 decks7 decks
24%synergy
Victimize
14%inclusion1 decks7 decks
-13%synergy
Revenge of the Rats
14%inclusion1 decks7 decks
11%synergy
Agadeem's Awakening
14%inclusion1 decks7 decks
7%synergy
Sinkhole
14%inclusion1 decks7 decks
14%synergy
Night's Whisper
14%inclusion1 decks7 decks
-11%synergy
Caress of Phyrexia
14%inclusion1 decks7 decks
14%synergy
Damnation
14%inclusion1 decks7 decks
-6%synergy
Feed the Infection
14%inclusion1 decks7 decks
14%synergy
Read the Bones
14%inclusion1 decks7 decks
-2%synergy
Sign in Blood
14%inclusion1 decks7 decks
-21%synergy
Rise of the Dark Realms
14%inclusion1 decks7 decks
1%synergy
Diabolic Tutor
14%inclusion1 decks7 decks
0%synergy
Patriarch's Bidding
14%inclusion1 decks7 decks
10%synergy
Forever Young
14%inclusion1 decks7 decks
13%synergy
Mutilate
14%inclusion1 decks7 decks
-2%synergy
Living Death
14%inclusion1 decks7 decks
4%synergy
Beseech the Mirror
14%inclusion1 decks7 decks
7%synergy
Secret Salvage
14%inclusion1 decks7 decks
13%synergy
Utility Artifacts
Chronicle of Victory
50%inclusion1 decks2 decks
47%synergy
Lightning Greaves
43%inclusion3 decks7 decks
9%synergy
Bontu's Monument
43%inclusion3 decks7 decks
14%synergy
Swiftfoot Boots
29%inclusion2 decks7 decks
-3%synergy
Grafted Exoskeleton
29%inclusion2 decks7 decks
27%synergy
Contagion Engine
29%inclusion2 decks7 decks
27%synergy
Sensei's Divining Top
29%inclusion2 decks7 decks
21%synergy
Aetherflux Reservoir
29%inclusion2 decks7 decks
19%synergy
Skullclamp
29%inclusion2 decks7 decks
6%synergy
Thornbite Staff
29%inclusion2 decks7 decks
26%synergy
The Darkness Crystal
20%inclusion1 decks5 decks
-0%synergy
Wayfarer's Bauble
14%inclusion1 decks7 decks
-1%synergy
Contagion Clasp
14%inclusion1 decks7 decks
12%synergy
Nim Deathmantle
14%inclusion1 decks7 decks
11%synergy
Ashnod's Altar
14%inclusion1 decks7 decks
-6%synergy
Coat of Arms
14%inclusion1 decks7 decks
12%synergy
Vanquisher's Banner
14%inclusion1 decks7 decks
10%synergy
Door of Destinies
14%inclusion1 decks7 decks
12%synergy
Basilisk Collar
14%inclusion1 decks7 decks
11%synergy
Defense Grid
14%inclusion1 decks7 decks
12%synergy
Cloud Key
14%inclusion1 decks7 decks
13%synergy
Oblivion Stone
14%inclusion1 decks7 decks
14%synergy
Shadowspear
14%inclusion1 decks7 decks
10%synergy
Banner of Kinship
14%inclusion1 decks7 decks
12%synergy
Tarrian's Journal
14%inclusion1 decks7 decks
13%synergy
Herald's Horn
14%inclusion1 decks7 decks
9%synergy
Altar of the Brood
14%inclusion1 decks7 decks
12%synergy
Sword of the Paruns
14%inclusion1 decks7 decks
14%synergy
Enchantments
Animate Dead
43%inclusion3 decks7 decks
26%synergy
Black Market Connections
29%inclusion2 decks7 decks
4%synergy
The Meathook Massacre
29%inclusion2 decks7 decks
11%synergy
Contamination
29%inclusion2 decks7 decks
25%synergy
Grave Pact
29%inclusion2 decks7 decks
9%synergy
Black Market
29%inclusion2 decks7 decks
8%synergy
Cover of Darkness
29%inclusion2 decks7 decks
26%synergy
Oversold Cemetery
29%inclusion2 decks7 decks
23%synergy
Necrogen Communion
29%inclusion2 decks7 decks
27%synergy
Tribute to Horobi
14%inclusion1 decks7 decks
13%synergy
Haunted One
14%inclusion1 decks7 decks
12%synergy
Necropotence
14%inclusion1 decks7 decks
-0%synergy
Phyresis
14%inclusion1 decks7 decks
12%synergy
Carnival of Souls
14%inclusion1 decks7 decks
13%synergy
No Mercy
14%inclusion1 decks7 decks
7%synergy
Bad Moon
14%inclusion1 decks7 decks
11%synergy
Case of the Stashed Skeleton
14%inclusion1 decks7 decks
12%synergy
Dictate of Erebos
14%inclusion1 decks7 decks
3%synergy
Bitterblossom
14%inclusion1 decks7 decks
1%synergy
Planeswalkers
Vraska, Betrayal's Sting
43%inclusion3 decks7 decks
40%synergy
Karn, the Great Creator
14%inclusion1 decks7 decks
14%synergy
Ugin, the Spirit Dragon
14%inclusion1 decks7 decks
14%synergy
Utility Lands
Cabal Coffers
86%inclusion6 decks7 decks
31%synergy
Phyrexian Tower
71%inclusion5 decks7 decks
46%synergy
Nykthos, Shrine to Nyx
57%inclusion4 decks7 decks
27%synergy
Karn's Bastion
57%inclusion4 decks7 decks
53%synergy
Bojuka Bog
57%inclusion4 decks7 decks
10%synergy
Realm of Koh
50%inclusion1 decks2 decks
47%synergy
Mudflat Village
43%inclusion3 decks7 decks
40%synergy
Three Tree City
43%inclusion3 decks7 decks
38%synergy
Castle Locthwain
29%inclusion2 decks7 decks
12%synergy
Volrath's Stronghold
29%inclusion2 decks7 decks
25%synergy
Takenuma, Abandoned Mire
29%inclusion2 decks7 decks
13%synergy
Urza's Saga
29%inclusion2 decks7 decks
21%synergy
Strip Mine
29%inclusion2 decks7 decks
26%synergy
Shizo, Death's Storehouse
14%inclusion1 decks7 decks
4%synergy
Mortuary Mire
14%inclusion1 decks7 decks
1%synergy
Vesuva
14%inclusion1 decks7 decks
12%synergy
War Room
14%inclusion1 decks7 decks
-2%synergy
Cabal Stronghold
14%inclusion1 decks7 decks
-20%synergy
Boseiju, Who Shelters All
14%inclusion1 decks7 decks
13%synergy
Inkmoth Nexus
14%inclusion1 decks7 decks
13%synergy
Emergence Zone
14%inclusion1 decks7 decks
11%synergy
Field of the Dead
14%inclusion1 decks7 decks
13%synergy
Mutavault
14%inclusion1 decks7 decks
14%synergy
Witch's Cottage
14%inclusion1 decks7 decks
-10%synergy
Reliquary Tower
14%inclusion1 decks7 decks
-16%synergy
Mana Artifacts
Sol Ring
86%inclusion6 decks7 decks
0%synergy
Arcane Signet
71%inclusion5 decks7 decks
10%synergy
Lotus Petal
43%inclusion3 decks7 decks
35%synergy
Glistening Sphere
29%inclusion2 decks7 decks
27%synergy
Caged Sun
14%inclusion1 decks7 decks
3%synergy
Grim Monolith
14%inclusion1 decks7 decks
11%synergy
Throne of Eldraine
14%inclusion1 decks7 decks
5%synergy
Mox Opal
14%inclusion1 decks7 decks
11%synergy
Patchwork Banner
14%inclusion1 decks7 decks
10%synergy
Mox Amber
14%inclusion1 decks7 decks
10%synergy
Staff of Compleation
14%inclusion1 decks7 decks
13%synergy
Lands
Swamp
86%inclusion6 decks7 decks
-10%synergy
Cavern of Souls
57%inclusion4 decks7 decks
50%synergy
Malakir Rebirth
29%inclusion2 decks7 decks
5%synergy
Fell the Profane
14%inclusion1 decks7 decks
-5%synergy
Command Tower
14%inclusion1 decks7 decks
9%synergy
Exotic Orchard
14%inclusion1 decks7 decks
13%synergy
Agadeem's Awakening
14%inclusion1 decks7 decks
7%synergy
Reflecting Pool
14%inclusion1 decks7 decks
14%synergy
Unclaimed Territory
14%inclusion1 decks7 decks
14%synergy
Path of Ancestry
14%inclusion1 decks7 decks
9%synergy
Gemstone Caverns
14%inclusion1 decks7 decks
10%synergy
Snow-Covered Swamp
14%inclusion1 decks7 decks
8%synergy
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