Karumonix, the Rat King (Commander) - Expensive Proliferate

Karumonix, the Rat King
Rank #393
4decks
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
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Marrow-Gnawer
100%inclusion4 decks4 decks
97%synergy
Ashcoat of the Shadow Swarm
100%inclusion4 decks4 decks
97%synergy
Karn's Bastion
100%inclusion4 decks4 decks
96%synergy
Piper of the Swarm
100%inclusion4 decks4 decks
93%synergy
Nykthos, Shrine to Nyx
100%inclusion4 decks4 decks
70%synergy
Urborg, Tomb of Yawgmoth
100%inclusion4 decks4 decks
62%synergy
Cabal Coffers
100%inclusion4 decks4 decks
45%synergy
Game Changers
Demonic Tutor
50%inclusion2 decks4 decks
23%synergy
Imperial Seal
25%inclusion1 decks4 decks
18%synergy
Bolas's Citadel
25%inclusion1 decks4 decks
-3%synergy
Mishra's Workshop
25%inclusion1 decks4 decks
25%synergy
Vampiric Tutor
25%inclusion1 decks4 decks
4%synergy
Creatures
Crypt Rats
75%inclusion3 decks4 decks
70%synergy
Pack Rat
75%inclusion3 decks4 decks
69%synergy
Persistent Marshstalker
75%inclusion3 decks4 decks
72%synergy
Blightbelly Rat
75%inclusion3 decks4 decks
72%synergy
Septic Rats
75%inclusion3 decks4 decks
73%synergy
Rancid Rats
75%inclusion3 decks4 decks
73%synergy
Lord Skitter, Sewer King
75%inclusion3 decks4 decks
67%synergy
Ichor Rats
75%inclusion3 decks4 decks
72%synergy
Ogre Slumlord
50%inclusion2 decks4 decks
40%synergy
Mukotai Ambusher
50%inclusion2 decks4 decks
49%synergy
Filth
50%inclusion2 decks4 decks
48%synergy
Lord Skitter's Butcher
50%inclusion2 decks4 decks
47%synergy
Locust Miser
50%inclusion2 decks4 decks
48%synergy
Nezumi Prowler
50%inclusion2 decks4 decks
49%synergy
Gnat Miser
50%inclusion2 decks4 decks
47%synergy
Nashi, Moon Sage's Scion
50%inclusion2 decks4 decks
46%synergy
Typhoid Rats
50%inclusion2 decks4 decks
46%synergy
Stronghold Rats
50%inclusion2 decks4 decks
46%synergy
Rat Colony
50%inclusion2 decks4 decks
44%synergy
Splinter, the Mentor
50%inclusion1 decks2 decks
49%synergy
Rat King, Verminister
50%inclusion1 decks2 decks
47%synergy
Rat King, Pale Piper
50%inclusion1 decks2 decks
46%synergy
Elephant-Rat
33%inclusion1 decks3 decks
33%synergy
Maha, Its Feathers Night
25%inclusion1 decks4 decks
21%synergy
Burglar Rat
25%inclusion1 decks4 decks
14%synergy
Ravenous Rats
25%inclusion1 decks4 decks
23%synergy
Crashing Drawbridge
25%inclusion1 decks4 decks
23%synergy
Gnawing Vermin
25%inclusion1 decks4 decks
24%synergy
Ruthless Radrat
25%inclusion1 decks4 decks
24%synergy
Ayara, First of Locthwain
25%inclusion1 decks4 decks
-0%synergy
Gray Merchant of Asphodel
25%inclusion1 decks4 decks
-26%synergy
Tangled Colony
25%inclusion1 decks4 decks
22%synergy
Nezumi Bladeblesser
25%inclusion1 decks4 decks
24%synergy
Diseased Vermin
25%inclusion1 decks4 decks
25%synergy
Species Specialist
25%inclusion1 decks4 decks
22%synergy
Throat Slitter
25%inclusion1 decks4 decks
23%synergy
Zodiac Rat
25%inclusion1 decks4 decks
25%synergy
Myr Convert
25%inclusion1 decks4 decks
24%synergy
Boggart Trawler
25%inclusion1 decks4 decks
16%synergy
Razortooth Rats
25%inclusion1 decks4 decks
24%synergy
Engine Rat
25%inclusion1 decks4 decks
23%synergy
Bilious Skulldweller
25%inclusion1 decks4 decks
24%synergy
Chittering Skitterling
25%inclusion1 decks4 decks
24%synergy
Voracious Vermin
25%inclusion1 decks4 decks
22%synergy
Ossuary Rats
25%inclusion1 decks4 decks
25%synergy
Crypt Ghast
25%inclusion1 decks4 decks
-22%synergy
Changeling Outcast
25%inclusion1 decks4 decks
20%synergy
Sheoldred's Headcleaver
25%inclusion1 decks4 decks
25%synergy
Ratcatcher
25%inclusion1 decks4 decks
22%synergy
Vraan, Executioner Thane
25%inclusion1 decks4 decks
22%synergy
Instants
Dark Ritual
75%inclusion3 decks4 decks
8%synergy
Vraska's Fall
50%inclusion2 decks4 decks
47%synergy
Tainted Strike
50%inclusion2 decks4 decks
47%synergy
Malakir Rebirth
50%inclusion2 decks4 decks
27%synergy
Withering Torment
50%inclusion2 decks4 decks
19%synergy
Hagra Mauling
25%inclusion1 decks4 decks
21%synergy
Reckoner's Bargain
25%inclusion1 decks4 decks
22%synergy
Fell the Profane
25%inclusion1 decks4 decks
6%synergy
Go for the Throat
25%inclusion1 decks4 decks
2%synergy
Village Rites
25%inclusion1 decks4 decks
-1%synergy
Not Dead After All
25%inclusion1 decks4 decks
14%synergy
Songs of the Damned
25%inclusion1 decks4 decks
20%synergy
Deadly Dispute
25%inclusion1 decks4 decks
-1%synergy
Wring Flesh
25%inclusion1 decks4 decks
25%synergy
Cabal Ritual
25%inclusion1 decks4 decks
7%synergy
Culling the Weak
25%inclusion1 decks4 decks
8%synergy
Supernatural Stamina
25%inclusion1 decks4 decks
17%synergy
Extinguish the Light
25%inclusion1 decks4 decks
25%synergy
Undying Malice
25%inclusion1 decks4 decks
15%synergy
Costly Plunder
25%inclusion1 decks4 decks
23%synergy
Unseal the Necropolis
25%inclusion1 decks4 decks
23%synergy
Corrupted Conviction
25%inclusion1 decks4 decks
12%synergy
Offer Immortality
25%inclusion1 decks4 decks
23%synergy
Sudden Spoiling
25%inclusion1 decks4 decks
16%synergy
Feign Death
25%inclusion1 decks4 decks
17%synergy
Sorceries
Infectious Inquiry
75%inclusion3 decks4 decks
72%synergy
Phyresis Outbreak
50%inclusion2 decks4 decks
48%synergy
Swarmyard Massacre
50%inclusion2 decks4 decks
48%synergy
Feed the Swarm
50%inclusion2 decks4 decks
-0%synergy
Drown in Ichor
50%inclusion2 decks4 decks
46%synergy
Plague of Vermin
50%inclusion2 decks4 decks
48%synergy
Bloodline Bidding
50%inclusion1 decks2 decks
46%synergy
Splinter's Technique
50%inclusion1 decks2 decks
48%synergy
Strategic Betrayal
25%inclusion1 decks4 decks
24%synergy
Vat Emergence
25%inclusion1 decks4 decks
24%synergy
Demogorgon's Clutches
25%inclusion1 decks4 decks
25%synergy
Bone Splinters
25%inclusion1 decks4 decks
23%synergy
Victimize
25%inclusion1 decks4 decks
-2%synergy
Patriarch's Bidding
25%inclusion1 decks4 decks
21%synergy
Bubbling Muck
25%inclusion1 decks4 decks
9%synergy
Feed the Infection
25%inclusion1 decks4 decks
24%synergy
Unearth
25%inclusion1 decks4 decks
16%synergy
Bone Shards
25%inclusion1 decks4 decks
21%synergy
Night's Whisper
25%inclusion1 decks4 decks
0%synergy
Buried Alive
25%inclusion1 decks4 decks
13%synergy
Ashes to Ashes
25%inclusion1 decks4 decks
25%synergy
Reanimate
25%inclusion1 decks4 decks
-15%synergy
Diresight
25%inclusion1 decks4 decks
22%synergy
Toxic Deluge
25%inclusion1 decks4 decks
-12%synergy
Sign in Blood
25%inclusion1 decks4 decks
-10%synergy
Final Vengeance
25%inclusion1 decks4 decks
23%synergy
Utility Artifacts
Jet Medallion
75%inclusion3 decks4 decks
13%synergy
Contagion Clasp
50%inclusion2 decks4 decks
48%synergy
Contagion Engine
50%inclusion2 decks4 decks
48%synergy
Herald's Horn
50%inclusion2 decks4 decks
44%synergy
Chronicle of Victory
50%inclusion1 decks2 decks
47%synergy
Ashnod's Altar
25%inclusion1 decks4 decks
5%synergy
Whip of Erebos
25%inclusion1 decks4 decks
14%synergy
Vorpal Sword
25%inclusion1 decks4 decks
21%synergy
Lavaspur Boots
25%inclusion1 decks4 decks
23%synergy
Skullclamp
25%inclusion1 decks4 decks
3%synergy
Sword of Truth and Justice
25%inclusion1 decks4 decks
24%synergy
Prosthetic Injector
25%inclusion1 decks4 decks
25%synergy
Helm of the Host
25%inclusion1 decks4 decks
24%synergy
Banner of Kinship
25%inclusion1 decks4 decks
23%synergy
Expedition Map
25%inclusion1 decks4 decks
13%synergy
Sword of Hearth and Home
25%inclusion1 decks4 decks
24%synergy
Bontu's Monument
25%inclusion1 decks4 decks
-3%synergy
Blade of Selves
25%inclusion1 decks4 decks
24%synergy
Manascape Refractor
25%inclusion1 decks4 decks
25%synergy
Nihil Spellbomb
25%inclusion1 decks4 decks
24%synergy
Lightning Greaves
25%inclusion1 decks4 decks
-9%synergy
Basilisk Collar
25%inclusion1 decks4 decks
22%synergy
Enchantments
Cover of Darkness
75%inclusion3 decks4 decks
72%synergy
Grave Pact
50%inclusion2 decks4 decks
30%synergy
Black Market Connections
50%inclusion2 decks4 decks
26%synergy
Phyrexian Arena
50%inclusion2 decks4 decks
11%synergy
Waste Not
25%inclusion1 decks4 decks
15%synergy
Glistening Oil
25%inclusion1 decks4 decks
24%synergy
Vampiric Rites
25%inclusion1 decks4 decks
19%synergy
Haunted One
25%inclusion1 decks4 decks
22%synergy
Phyresis
25%inclusion1 decks4 decks
23%synergy
Kaya's Ghostform
25%inclusion1 decks4 decks
15%synergy
No Mercy
25%inclusion1 decks4 decks
18%synergy
Oversold Cemetery
25%inclusion1 decks4 decks
20%synergy
Necrogen Communion
25%inclusion1 decks4 decks
23%synergy
Planeswalkers
Vraska, Betrayal's Sting
50%inclusion2 decks4 decks
47%synergy
Liliana of the Dark Realms
50%inclusion2 decks4 decks
36%synergy
Utility Lands
Cabal Stronghold
75%inclusion3 decks4 decks
41%synergy
Phyrexian Tower
75%inclusion3 decks4 decks
49%synergy
Swarmyard
75%inclusion3 decks4 decks
69%synergy
Crypt of Agadeem
75%inclusion3 decks4 decks
64%synergy
Shizo, Death's Storehouse
50%inclusion2 decks4 decks
40%synergy
Bojuka Bog
50%inclusion2 decks4 decks
3%synergy
Barren Moor
50%inclusion2 decks4 decks
40%synergy
Takenuma, Abandoned Mire
50%inclusion2 decks4 decks
34%synergy
Dark Depths
50%inclusion2 decks4 decks
49%synergy
Three Tree City
50%inclusion2 decks4 decks
45%synergy
Westvale Abbey
25%inclusion1 decks4 decks
18%synergy
Witch's Clinic
25%inclusion1 decks4 decks
24%synergy
Mortuary Mire
25%inclusion1 decks4 decks
12%synergy
Witch's Cottage
25%inclusion1 decks4 decks
0%synergy
The Dross Pits
25%inclusion1 decks4 decks
24%synergy
Minas Morgul, Dark Fortress
25%inclusion1 decks4 decks
22%synergy
Inventors' Fair
25%inclusion1 decks4 decks
23%synergy
Peat Bog
25%inclusion1 decks4 decks
23%synergy
Terrain Generator
25%inclusion1 decks4 decks
23%synergy
Mudflat Village
25%inclusion1 decks4 decks
22%synergy
Thespian's Stage
25%inclusion1 decks4 decks
20%synergy
Lake of the Dead
25%inclusion1 decks4 decks
20%synergy
Castle Locthwain
25%inclusion1 decks4 decks
8%synergy
Reliquary Tower
25%inclusion1 decks4 decks
-5%synergy
Dakmor Salvage
25%inclusion1 decks4 decks
23%synergy
Strip Mine
25%inclusion1 decks4 decks
22%synergy
Rogue's Passage
25%inclusion1 decks4 decks
6%synergy
Midgar, City of Mako
25%inclusion1 decks4 decks
14%synergy
Mana Artifacts
Glistening Sphere
75%inclusion3 decks4 decks
74%synergy
Sol Ring
50%inclusion2 decks4 decks
-36%synergy
Arcane Signet
25%inclusion1 decks4 decks
-37%synergy
Staff of Compleation
25%inclusion1 decks4 decks
23%synergy
Charcoal Diamond
25%inclusion1 decks4 decks
3%synergy
Basalt Monolith
25%inclusion1 decks4 decks
23%synergy
Skull of Ramos
25%inclusion1 decks4 decks
25%synergy
Phyrexian Atlas
25%inclusion1 decks4 decks
25%synergy
Lands
Swamp
100%inclusion4 decks4 decks
5%synergy
Cavern of Souls
75%inclusion3 decks4 decks
68%synergy
Malakir Rebirth
50%inclusion2 decks4 decks
27%synergy
Path of Ancestry
50%inclusion2 decks4 decks
45%synergy
Hagra Mauling
25%inclusion1 decks4 decks
21%synergy
Fell the Profane
25%inclusion1 decks4 decks
6%synergy
Command Tower
25%inclusion1 decks4 decks
19%synergy
Boggart Trawler
25%inclusion1 decks4 decks
16%synergy
Demolition Field
25%inclusion1 decks4 decks
20%synergy
Snow-Covered Swamp
25%inclusion1 decks4 decks
18%synergy
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