Karumonix, the Rat King (Commander) - Expensive Rat Colony

Karumonix, the Rat King
Rank #406
36decks
As CommanderAs CardAverage DeckDecks
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Budget
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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
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Rat Colony
100%inclusion36 decks36 decks
94%synergy
Marrow-Gnawer
94%inclusion34 decks36 decks
91%synergy
Pack Rat
83%inclusion30 decks36 decks
78%synergy
Piper of the Swarm
83%inclusion30 decks36 decks
77%synergy
Ashcoat of the Shadow Swarm
72%inclusion26 decks36 decks
69%synergy
Swarmyard
72%inclusion26 decks36 decks
67%synergy
Karn's Bastion
58%inclusion21 decks36 decks
55%synergy
Crypt Rats
56%inclusion20 decks36 decks
51%synergy
Infectious Inquiry
53%inclusion19 decks36 decks
50%synergy
Blightbelly Rat
53%inclusion19 decks36 decks
49%synergy
Top Cards
Jet Medallion
81%inclusion29 decks36 decks
18%synergy
Dark Ritual
72%inclusion26 decks36 decks
5%synergy
Bontu's Monument
67%inclusion24 decks36 decks
39%synergy
Skullclamp
61%inclusion22 decks36 decks
39%synergy
Ogre Slumlord
53%inclusion19 decks36 decks
43%synergy
Lord Skitter, Sewer King
53%inclusion19 decks36 decks
45%synergy
Deadly Rollick
50%inclusion18 decks36 decks
25%synergy
Vraska's Fall
50%inclusion18 decks36 decks
47%synergy
Phyrexian Arena
47%inclusion17 decks36 decks
8%synergy
Thrumming Stone
47%inclusion17 decks36 decks
43%synergy
Game Changers
Demonic Tutor
92%inclusion33 decks36 decks
65%synergy
Vampiric Tutor
83%inclusion30 decks36 decks
62%synergy
Imperial Seal
31%inclusion11 decks36 decks
24%synergy
Ancient Tomb
28%inclusion10 decks36 decks
16%synergy
The One Ring
28%inclusion10 decks36 decks
18%synergy
Bolas's Citadel
25%inclusion9 decks36 decks
-3%synergy
Necropotence
17%inclusion6 decks36 decks
2%synergy
Mox Diamond
17%inclusion6 decks36 decks
13%synergy
Chrome Mox
11%inclusion4 decks36 decks
5%synergy
Creatures
Ichor Rats
42%inclusion15 decks36 decks
39%synergy
Ayara, First of Locthwain
39%inclusion14 decks36 decks
14%synergy
Species Specialist
39%inclusion14 decks36 decks
36%synergy
Filth
28%inclusion10 decks36 decks
25%synergy
Locust Miser
28%inclusion10 decks36 decks
26%synergy
Crypt Ghast
28%inclusion10 decks36 decks
-19%synergy
Gnat Miser
28%inclusion10 decks36 decks
25%synergy
Rancid Rats
28%inclusion10 decks36 decks
25%synergy
Gray Merchant of Asphodel
25%inclusion9 decks36 decks
-25%synergy
Valley Rotcaller
25%inclusion9 decks36 decks
22%synergy
Yawgmoth, Thran Physician
25%inclusion9 decks36 decks
15%synergy
Septic Rats
25%inclusion9 decks36 decks
23%synergy
Typhoid Rats
25%inclusion9 decks36 decks
21%synergy
Tangled Colony
22%inclusion8 decks36 decks
19%synergy
Lord Skitter's Butcher
22%inclusion8 decks36 decks
19%synergy
Swarm of Rats
22%inclusion8 decks36 decks
20%synergy
Ratcatcher
22%inclusion8 decks36 decks
19%synergy
Burglar Rat
19%inclusion7 decks36 decks
9%synergy
Ink-Eyes, Servant of Oni
19%inclusion7 decks36 decks
16%synergy
Persistent Marshstalker
19%inclusion7 decks36 decks
17%synergy
Changeling Outcast
19%inclusion7 decks36 decks
14%synergy
Nashi, Moon Sage's Scion
19%inclusion7 decks36 decks
16%synergy
Stronghold Rats
14%inclusion5 decks36 decks
10%synergy
Crashing Drawbridge
11%inclusion4 decks36 decks
9%synergy
Sheoldred, the Apocalypse
11%inclusion4 decks36 decks
-4%synergy
Roaming Throne
11%inclusion4 decks36 decks
8%synergy
Throat Slitter
11%inclusion4 decks36 decks
9%synergy
Chittering Skitterling
11%inclusion4 decks36 decks
10%synergy
Chittering Witch
11%inclusion4 decks36 decks
7%synergy
Old Flitterfang
11%inclusion4 decks36 decks
10%synergy
Rev, Tithe Extractor
9.1%inclusion2 decks22 decks
7%synergy
Ruthless Radrat
8.3%inclusion3 decks36 decks
8%synergy
Infected Vermin
8.3%inclusion3 decks36 decks
8%synergy
Scrib Nibblers
8.3%inclusion3 decks36 decks
8%synergy
Zodiac Rat
8.3%inclusion3 decks36 decks
8%synergy
Voracious Vermin
8.3%inclusion3 decks36 decks
6%synergy
Nezumi Cutthroat
8.3%inclusion3 decks36 decks
8%synergy
Nezumi Informant
8.3%inclusion3 decks36 decks
2%synergy
Pestilence Rats
8.3%inclusion3 decks36 decks
6%synergy
Skithiryx, the Blight Dragon
8.3%inclusion3 decks36 decks
7%synergy
Innocuous Rat
5.9%inclusion2 decks34 decks
5%synergy
Ravenous Rats
5.6%inclusion2 decks36 decks
4%synergy
Blood Artist
5.6%inclusion2 decks36 decks
-26%synergy
Gnawing Vermin
5.6%inclusion2 decks36 decks
4%synergy
Daggerfang Duo
5.6%inclusion2 decks36 decks
5%synergy
Zulaport Cutthroat
5.6%inclusion2 decks36 decks
-17%synergy
Burnished Hart
5.6%inclusion2 decks36 decks
-1%synergy
Twisted Sewer-Witch
5.6%inclusion2 decks36 decks
4%synergy
Muck Rats
5.6%inclusion2 decks36 decks
5%synergy
K'rrik, Son of Yawgmoth
5.6%inclusion2 decks36 decks
-14%synergy
Instants
Defile
25%inclusion9 decks36 decks
-10%synergy
Infernal Grasp
25%inclusion9 decks36 decks
-0%synergy
Whisper of the Dross
22%inclusion8 decks36 decks
20%synergy
Go for the Throat
22%inclusion8 decks36 decks
-0%synergy
Village Rites
22%inclusion8 decks36 decks
-3%synergy
Deadly Dispute
19%inclusion7 decks36 decks
-7%synergy
Withering Torment
18%inclusion6 decks34 decks
-14%synergy
Malakir Rebirth
17%inclusion6 decks36 decks
-7%synergy
Tragic Slip
17%inclusion6 decks36 decks
-2%synergy
Imp's Mischief
14%inclusion5 decks36 decks
-11%synergy
Fell the Profane
11%inclusion4 decks36 decks
-9%synergy
Entomb
11%inclusion4 decks36 decks
-1%synergy
Snuff Out
11%inclusion4 decks36 decks
-3%synergy
Anoint with Affliction
11%inclusion4 decks36 decks
11%synergy
Culling the Weak
11%inclusion4 decks36 decks
-7%synergy
Corrupted Conviction
11%inclusion4 decks36 decks
-1%synergy
Hero's Downfall
8.3%inclusion3 decks36 decks
2%synergy
Cabal Ritual
8.3%inclusion3 decks36 decks
-10%synergy
Bitter Triumph
8.3%inclusion3 decks36 decks
-2%synergy
Tainted Strike
8.3%inclusion3 decks36 decks
5%synergy
Sudden Spoiling
8.3%inclusion3 decks36 decks
0%synergy
Fatal Push
5.6%inclusion2 decks36 decks
2%synergy
Rat Out
5.6%inclusion2 decks36 decks
4%synergy
Grim Affliction
5.6%inclusion2 decks36 decks
4%synergy
Doom Blade
5.6%inclusion2 decks36 decks
-1%synergy
Raise the Draugr
5.6%inclusion2 decks36 decks
5%synergy
Darkness
5.6%inclusion2 decks36 decks
-5%synergy
Foul-Tongue Shriek
5.6%inclusion2 decks36 decks
4%synergy
Warping Wail
5.6%inclusion2 decks36 decks
5%synergy
Sorceries
Phyresis Outbreak
44%inclusion16 decks36 decks
43%synergy
Diabolic Intent
39%inclusion14 decks36 decks
24%synergy
Patriarch's Bidding
39%inclusion14 decks36 decks
35%synergy
Reanimate
36%inclusion13 decks36 decks
-5%synergy
Kindred Dominance
36%inclusion13 decks36 decks
31%synergy
Grim Tutor
36%inclusion13 decks36 decks
25%synergy
Toxic Deluge
33%inclusion12 decks36 decks
-4%synergy
Feed the Swarm
28%inclusion10 decks36 decks
-23%synergy
Echoing Return
28%inclusion10 decks36 decks
25%synergy
Living Death
28%inclusion10 decks36 decks
17%synergy
Damnation
28%inclusion10 decks36 decks
8%synergy
Drown in Ichor
25%inclusion9 decks36 decks
21%synergy
Plague of Vermin
25%inclusion9 decks36 decks
23%synergy
Pact of the Serpent
25%inclusion9 decks36 decks
23%synergy
Sign in Blood
22%inclusion8 decks36 decks
-13%synergy
Secret Salvage
19%inclusion7 decks36 decks
18%synergy
Blasphemous Edict
19%inclusion4 decks21 decks
3%synergy
Swarmyard Massacre
17%inclusion6 decks36 decks
14%synergy
Revenge of the Rats
14%inclusion3 decks21 decks
11%synergy
Diabolic Tutor
14%inclusion5 decks36 decks
0%synergy
Victimize
14%inclusion5 decks36 decks
-14%synergy
Torment of Hailfire
14%inclusion5 decks36 decks
-1%synergy
Unearth
14%inclusion5 decks36 decks
5%synergy
Read the Bones
14%inclusion5 decks36 decks
-2%synergy
Mutilate
14%inclusion5 decks36 decks
-2%synergy
Night's Whisper
14%inclusion5 decks36 decks
-11%synergy
Bubbling Muck
11%inclusion4 decks36 decks
-5%synergy
Crippling Fear
11%inclusion4 decks36 decks
8%synergy
Spread the Sickness
8.3%inclusion3 decks36 decks
8%synergy
Forever Young
8.3%inclusion3 decks36 decks
7%synergy
In Garruk's Wake
8.3%inclusion3 decks36 decks
5%synergy
Gruesome Fate
8.3%inclusion3 decks36 decks
6%synergy
Plague Wind
5.6%inclusion2 decks36 decks
5%synergy
Exsanguinate
5.6%inclusion2 decks36 decks
-19%synergy
Caress of Phyrexia
5.6%inclusion2 decks36 decks
5%synergy
Syphon Mind
5.6%inclusion2 decks36 decks
-6%synergy
Insatiable Avarice
5.6%inclusion2 decks36 decks
-5%synergy
Geth's Summons
5.6%inclusion2 decks36 decks
5%synergy
Lab Rats
5.6%inclusion2 decks36 decks
5%synergy
Eaten Alive
5.6%inclusion2 decks36 decks
2%synergy
Breach the Multiverse
5.6%inclusion2 decks36 decks
-0%synergy
Utility Artifacts
Herald's Horn
42%inclusion15 decks36 decks
36%synergy
Vanquisher's Banner
36%inclusion13 decks36 decks
32%synergy
Whip of Erebos
31%inclusion11 decks36 decks
20%synergy
Contagion Engine
19%inclusion7 decks36 decks
18%synergy
Coat of Arms
19%inclusion7 decks36 decks
17%synergy
Akroma's Memorial
19%inclusion7 decks36 decks
19%synergy
Lightning Greaves
19%inclusion7 decks36 decks
-14%synergy
Door of Destinies
17%inclusion6 decks36 decks
15%synergy
Contagion Clasp
14%inclusion5 decks36 decks
12%synergy
Phyrexian Altar
14%inclusion5 decks36 decks
0%synergy
Swiftfoot Boots
14%inclusion5 decks36 decks
-18%synergy
Dolmen Gate
14%inclusion5 decks36 decks
13%synergy
Banner of Kinship
9.1%inclusion2 decks22 decks
7%synergy
Sensei's Divining Top
8.3%inclusion3 decks36 decks
0%synergy
Wayfarer's Bauble
8.3%inclusion3 decks36 decks
-6%synergy
Mirror Box
8.3%inclusion3 decks36 decks
8%synergy
Ashnod's Altar
8.3%inclusion3 decks36 decks
-11%synergy
Sword of the Squeak
8.3%inclusion3 decks36 decks
8%synergy
Sword of Truth and Justice
8.3%inclusion3 decks36 decks
8%synergy
Eldrazi Monument
8.3%inclusion3 decks36 decks
7%synergy
Altar of Dementia
8.3%inclusion3 decks36 decks
3%synergy
Sword of the Animist
8.3%inclusion3 decks36 decks
4%synergy
Thornbite Staff
8.3%inclusion3 decks36 decks
6%synergy
Grafted Exoskeleton
8.3%inclusion3 decks36 decks
7%synergy
Icon of Ancestry
5.6%inclusion2 decks36 decks
5%synergy
Aetherflux Reservoir
5.6%inclusion2 decks36 decks
-4%synergy
Wishclaw Talisman
5.6%inclusion2 decks36 decks
-2%synergy
Expedition Map
5.6%inclusion2 decks36 decks
-6%synergy
Sword of Hearth and Home
5.6%inclusion2 decks36 decks
4%synergy
Navigation Orb
5.6%inclusion2 decks36 decks
5%synergy
Locket of Yesterdays
5.6%inclusion2 decks36 decks
5%synergy
Demon's Horn
5.6%inclusion2 decks36 decks
1%synergy
Enchantments
Cover of Darkness
44%inclusion16 decks36 decks
41%synergy
Black Market Connections
42%inclusion15 decks36 decks
17%synergy
Grave Pact
25%inclusion9 decks36 decks
6%synergy
Haunted One
22%inclusion8 decks36 decks
20%synergy
The Meathook Massacre
17%inclusion6 decks36 decks
-1%synergy
Black Market
17%inclusion6 decks36 decks
-4%synergy
Phyrexian Reclamation
14%inclusion5 decks36 decks
4%synergy
Sanguine Bond
11%inclusion4 decks36 decks
-0%synergy
Dictate of Erebos
11%inclusion4 decks36 decks
0%synergy
Exquisite Blood
11%inclusion4 decks36 decks
-2%synergy
Necrogen Communion
11%inclusion4 decks36 decks
9%synergy
Phyresis
8.3%inclusion3 decks36 decks
6%synergy
Bad Moon
8.3%inclusion3 decks36 decks
5%synergy
Contamination
5.6%inclusion2 decks36 decks
2%synergy
Glistening Oil
5.6%inclusion2 decks36 decks
5%synergy
Vampiric Rites
5.6%inclusion2 decks36 decks
-0%synergy
Tribute to Horobi
5.6%inclusion2 decks36 decks
5%synergy
Carnival of Souls
5.6%inclusion2 decks36 decks
4%synergy
Dauthi Embrace
5.6%inclusion2 decks36 decks
4%synergy
Bastion of Remembrance
5.6%inclusion2 decks36 decks
-12%synergy
Lord Skitter's Blessing
5.6%inclusion2 decks36 decks
5%synergy
Oversold Cemetery
5.6%inclusion2 decks36 decks
0%synergy
Planeswalkers
Vraska, Betrayal's Sting
33%inclusion12 decks36 decks
31%synergy
Liliana of the Dark Realms
19%inclusion7 decks36 decks
6%synergy
Utility Lands
Cabal Coffers
89%inclusion32 decks36 decks
34%synergy
Urborg, Tomb of Yawgmoth
72%inclusion26 decks36 decks
35%synergy
Nykthos, Shrine to Nyx
69%inclusion25 decks36 decks
40%synergy
Bojuka Bog
58%inclusion21 decks36 decks
11%synergy
Reliquary Tower
56%inclusion20 decks36 decks
26%synergy
Phyrexian Tower
53%inclusion19 decks36 decks
27%synergy
Three Tree City
53%inclusion19 decks36 decks
48%synergy
Cabal Stronghold
47%inclusion17 decks36 decks
13%synergy
Rogue's Passage
44%inclusion16 decks36 decks
25%synergy
Shizo, Death's Storehouse
28%inclusion10 decks36 decks
17%synergy
War Room
28%inclusion10 decks36 decks
12%synergy
Crypt of Agadeem
25%inclusion9 decks36 decks
13%synergy
Witch's Cottage
25%inclusion9 decks36 decks
1%synergy
Mudflat Village
22%inclusion8 decks36 decks
19%synergy
Castle Locthwain
22%inclusion8 decks36 decks
6%synergy
Urza's Saga
17%inclusion6 decks36 decks
9%synergy
Mortuary Mire
14%inclusion5 decks36 decks
1%synergy
Inkmoth Nexus
14%inclusion5 decks36 decks
13%synergy
Takenuma, Abandoned Mire
14%inclusion5 decks36 decks
-2%synergy
Minas Morgul, Dark Fortress
11%inclusion4 decks36 decks
8%synergy
Access Tunnel
11%inclusion4 decks36 decks
8%synergy
Mutavault
8.3%inclusion3 decks36 decks
8%synergy
Lake of the Dead
8.3%inclusion3 decks36 decks
3%synergy
Leechridden Swamp
8.3%inclusion3 decks36 decks
6%synergy
The Black Gate
5.6%inclusion2 decks36 decks
2%synergy
Volrath's Stronghold
5.6%inclusion2 decks36 decks
2%synergy
Mana Artifacts
Sol Ring
92%inclusion33 decks36 decks
6%synergy
Arcane Signet
61%inclusion22 decks36 decks
-0%synergy
Glistening Sphere
44%inclusion16 decks36 decks
43%synergy
Staff of Compleation
25%inclusion9 decks36 decks
23%synergy
Patchwork Banner
17%inclusion6 decks36 decks
12%synergy
Thought Vessel
17%inclusion6 decks36 decks
-8%synergy
Mox Amber
11%inclusion4 decks36 decks
7%synergy
Mind Stone
11%inclusion4 decks36 decks
-17%synergy
Gauntlet of Power
8.3%inclusion3 decks36 decks
5%synergy
Mana Crypt
8.3%inclusion3 decks36 decks
8%synergy
Throne of Eldraine
8.3%inclusion3 decks36 decks
-1%synergy
Fellwar Stone
8.3%inclusion3 decks36 decks
-6%synergy
Caged Sun
5.6%inclusion2 decks36 decks
-5%synergy
Charcoal Diamond
5.6%inclusion2 decks36 decks
-16%synergy
Jeweled Lotus
5.6%inclusion2 decks36 decks
5%synergy
Decanter of Endless Water
5.6%inclusion2 decks36 decks
3%synergy
Nyx Lotus
5.6%inclusion2 decks36 decks
-0%synergy
Extraplanar Lens
5.6%inclusion2 decks36 decks
1%synergy
Lands
Swamp
89%inclusion32 decks36 decks
-6%synergy
Cavern of Souls
69%inclusion25 decks36 decks
63%synergy
Path of Ancestry
28%inclusion10 decks36 decks
23%synergy
Command Tower
17%inclusion6 decks36 decks
11%synergy
Malakir Rebirth
17%inclusion6 decks36 decks
-7%synergy
Snow-Covered Swamp
14%inclusion5 decks36 decks
7%synergy
Fell the Profane
11%inclusion4 decks36 decks
-9%synergy
Myriad Landscape
11%inclusion4 decks36 decks
-13%synergy
Verdant Catacombs
11%inclusion4 decks36 decks
8%synergy
Marsh Flats
11%inclusion4 decks36 decks
7%synergy
Polluted Delta
11%inclusion4 decks36 decks
7%synergy
Bloodstained Mire
11%inclusion4 decks36 decks
7%synergy
Mirrex
5.6%inclusion2 decks36 decks
5%synergy
Gemstone Caverns
5.6%inclusion2 decks36 decks
1%synergy
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