Karumonix, the Rat King (Commander) - Upgraded Rats

Karumonix, the Rat King
Rank #407
27decks
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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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Blightbelly Rat
93%inclusion25 decks27 decks
89%synergy
Ichor Rats
85%inclusion23 decks27 decks
82%synergy
Piper of the Swarm
89%inclusion24 decks27 decks
82%synergy
Marrow-Gnawer
85%inclusion23 decks27 decks
82%synergy
Lord Skitter, Sewer King
81%inclusion22 decks27 decks
73%synergy
Infectious Inquiry
74%inclusion20 decks27 decks
71%synergy
Septic Rats
70%inclusion19 decks27 decks
69%synergy
Ogre Slumlord
78%inclusion21 decks27 decks
68%synergy
Karn's Bastion
70%inclusion19 decks27 decks
67%synergy
Tangled Colony
67%inclusion18 decks27 decks
64%synergy
Top Cards
Vraska's Fall
67%inclusion18 decks27 decks
63%synergy
Jet Medallion
63%inclusion17 decks27 decks
1%synergy
Drown in Ichor
63%inclusion17 decks27 decks
59%synergy
Dark Ritual
63%inclusion17 decks27 decks
-4%synergy
Burglar Rat
56%inclusion15 decks27 decks
45%synergy
Lord Skitter's Butcher
56%inclusion15 decks27 decks
53%synergy
Voracious Vermin
56%inclusion15 decks27 decks
53%synergy
Persistent Marshstalker
56%inclusion15 decks27 decks
53%synergy
Pack Rat
56%inclusion15 decks27 decks
50%synergy
Crypt Rats
56%inclusion15 decks27 decks
51%synergy
Game Changers
Vampiric Tutor
37%inclusion10 decks27 decks
16%synergy
Demonic Tutor
33%inclusion9 decks27 decks
6%synergy
Bolas's Citadel
7.4%inclusion2 decks27 decks
-21%synergy
Creatures
Rancid Rats
56%inclusion15 decks27 decks
53%synergy
Stronghold Rats
56%inclusion15 decks27 decks
52%synergy
Ashcoat of the Shadow Swarm
52%inclusion14 decks27 decks
48%synergy
Typhoid Rats
52%inclusion14 decks27 decks
48%synergy
Rat Colony
52%inclusion14 decks27 decks
46%synergy
Nezumi Informant
48%inclusion13 decks27 decks
42%synergy
Ratcatcher
48%inclusion13 decks27 decks
45%synergy
Ink-Eyes, Servant of Oni
44%inclusion12 decks27 decks
41%synergy
Chittering Skitterling
44%inclusion12 decks27 decks
44%synergy
Gnat Miser
44%inclusion12 decks27 decks
42%synergy
Ayara, First of Locthwain
41%inclusion11 decks27 decks
16%synergy
Wave of Rats
41%inclusion11 decks27 decks
39%synergy
Nashi, Moon Sage's Scion
41%inclusion11 decks27 decks
37%synergy
Rat King, Pale Piper
39%inclusion7 decks18 decks
35%synergy
Throat Slitter
37%inclusion10 decks27 decks
35%synergy
Rat King, Verminister
32%inclusion6 decks19 decks
28%synergy
Gray Merchant of Asphodel
30%inclusion8 decks27 decks
-21%synergy
Locust Miser
30%inclusion8 decks27 decks
28%synergy
Chittering Witch
30%inclusion8 decks27 decks
25%synergy
Changeling Outcast
30%inclusion8 decks27 decks
25%synergy
Nezumi Prowler
30%inclusion8 decks27 decks
28%synergy
Undercity Dire Rat
27%inclusion7 decks26 decks
25%synergy
Gnawing Vermin
26%inclusion7 decks27 decks
25%synergy
Pestilence Rats
26%inclusion7 decks27 decks
24%synergy
Species Specialist
22%inclusion6 decks27 decks
19%synergy
Swarm of Rats
22%inclusion6 decks27 decks
20%synergy
Twisted Sewer-Witch
22%inclusion6 decks27 decks
21%synergy
Nezumi Cutthroat
22%inclusion6 decks27 decks
22%synergy
Ravenous Rats
19%inclusion5 decks27 decks
17%synergy
Valley Rotcaller
19%inclusion5 decks27 decks
16%synergy
Crypt Ghast
19%inclusion5 decks27 decks
-28%synergy
Okiba-Gang Shinobi
19%inclusion5 decks27 decks
18%synergy
Ruin Rat
19%inclusion5 decks27 decks
17%synergy
Bog Rats
15%inclusion4 decks27 decks
14%synergy
Drainpipe Vermin
15%inclusion4 decks27 decks
14%synergy
Patron of the Nezumi
11%inclusion3 decks27 decks
11%synergy
Relentless Rats
11%inclusion3 decks27 decks
9%synergy
Rotting Rats
11%inclusion3 decks27 decks
8%synergy
Filth
11%inclusion3 decks27 decks
9%synergy
Skullsnatcher
11%inclusion3 decks27 decks
10%synergy
Adaptive Automaton
11%inclusion3 decks27 decks
10%synergy
Zodiac Rat
11%inclusion3 decks27 decks
11%synergy
Razortooth Rats
11%inclusion3 decks27 decks
11%synergy
Engine Rat
11%inclusion3 decks27 decks
9%synergy
Yawgmoth, Thran Physician
11%inclusion3 decks27 decks
1%synergy
Nezumi Bone-Reader
11%inclusion3 decks27 decks
10%synergy
Emeritus of Woe
8.3%inclusion1 decks12 decks
1%synergy
Chittering Rats
7.4%inclusion2 decks27 decks
7%synergy
Nezumi Graverobber
7.4%inclusion2 decks27 decks
6%synergy
Ruthless Radrat
7.4%inclusion2 decks27 decks
7%synergy
Instants
Whisper of the Dross
48%inclusion13 decks27 decks
46%synergy
Village Rites
41%inclusion11 decks27 decks
15%synergy
Go for the Throat
33%inclusion9 decks27 decks
11%synergy
Rat Out
30%inclusion8 decks27 decks
28%synergy
Grim Affliction
30%inclusion8 decks27 decks
28%synergy
Deadly Dispute
30%inclusion8 decks27 decks
3%synergy
Defile
26%inclusion7 decks27 decks
-9%synergy
Culling the Weak
26%inclusion7 decks27 decks
8%synergy
Malakir Rebirth
26%inclusion7 decks27 decks
2%synergy
Deadly Rollick
22%inclusion6 decks27 decks
-3%synergy
Tainted Strike
22%inclusion6 decks27 decks
19%synergy
Anoint with Affliction
19%inclusion5 decks27 decks
18%synergy
Sheoldred's Edict
15%inclusion4 decks27 decks
-0%synergy
Snuff Out
15%inclusion4 decks27 decks
1%synergy
Extinguish the Light
15%inclusion4 decks27 decks
15%synergy
Corrupted Conviction
15%inclusion4 decks27 decks
2%synergy
Sudden Spoiling
15%inclusion4 decks27 decks
7%synergy
Tragic Slip
15%inclusion4 decks27 decks
-4%synergy
Withering Torment
15%inclusion4 decks27 decks
-17%synergy
Hagra Mauling
11%inclusion3 decks27 decks
7%synergy
Infernal Grasp
11%inclusion3 decks27 decks
-14%synergy
Unbury
10%inclusion2 decks20 decks
9%synergy
Fell the Profane
7.4%inclusion2 decks27 decks
-12%synergy
Force of Despair
7.4%inclusion2 decks27 decks
-0%synergy
Imp's Mischief
7.4%inclusion2 decks27 decks
-18%synergy
Flare of Malice
7.4%inclusion2 decks27 decks
-6%synergy
Cabal Ritual
7.4%inclusion2 decks27 decks
-11%synergy
Supernatural Stamina
7.4%inclusion2 decks27 decks
-0%synergy
Altar's Reap
7.4%inclusion2 decks27 decks
5%synergy
Virulent Wound
7.4%inclusion2 decks27 decks
7%synergy
Undying Malice
7.4%inclusion2 decks27 decks
-3%synergy
Darkness
7.4%inclusion2 decks27 decks
-3%synergy
Murder
7.4%inclusion2 decks27 decks
-2%synergy
Plumb the Forbidden
7.4%inclusion2 decks27 decks
3%synergy
Feign Death
7.4%inclusion2 decks27 decks
-1%synergy
Sorceries
Phyresis Outbreak
44%inclusion12 decks27 decks
43%synergy
Patriarch's Bidding
41%inclusion11 decks27 decks
37%synergy
Revenge of the Rats
41%inclusion11 decks27 decks
38%synergy
Crippling Fear
37%inclusion10 decks27 decks
34%synergy
Bloodline Bidding
30%inclusion6 decks20 decks
26%synergy
Vat Emergence
30%inclusion8 decks27 decks
28%synergy
Sign in Blood
30%inclusion8 decks27 decks
-5%synergy
Feed the Infection
26%inclusion7 decks27 decks
25%synergy
Night's Whisper
26%inclusion7 decks27 decks
1%synergy
Kindred Dominance
26%inclusion7 decks27 decks
21%synergy
Spread the Sickness
22%inclusion6 decks27 decks
22%synergy
Feed the Swarm
22%inclusion6 decks27 decks
-28%synergy
Toxic Deluge
22%inclusion6 decks27 decks
-15%synergy
Bubbling Muck
19%inclusion5 decks27 decks
3%synergy
Swarmyard Massacre
19%inclusion5 decks27 decks
16%synergy
Shredder's Technique
17%inclusion3 decks18 decks
14%synergy
Unearth
15%inclusion4 decks27 decks
6%synergy
Reanimate
15%inclusion4 decks27 decks
-26%synergy
Damnation
15%inclusion4 decks27 decks
-5%synergy
Pact of the Serpent
15%inclusion4 decks27 decks
13%synergy
Diabolic Intent
11%inclusion3 decks27 decks
-4%synergy
Diabolic Tutor
11%inclusion3 decks27 decks
-3%synergy
Profane Tutor
11%inclusion3 decks27 decks
7%synergy
Echoing Return
11%inclusion3 decks27 decks
8%synergy
Read the Bones
11%inclusion3 decks27 decks
-5%synergy
Exsanguinate
11%inclusion3 decks27 decks
-14%synergy
Caress of Phyrexia
11%inclusion3 decks27 decks
11%synergy
Grim Tutor
11%inclusion3 decks27 decks
-0%synergy
Plague of Vermin
11%inclusion3 decks27 decks
9%synergy
Black Sun's Zenith
7.4%inclusion2 decks27 decks
2%synergy
Victimize
7.4%inclusion2 decks27 decks
-20%synergy
Mutilate
7.4%inclusion2 decks27 decks
-8%synergy
Blasphemous Edict
7.4%inclusion2 decks27 decks
-9%synergy
Decree of Pain
7.4%inclusion2 decks27 decks
2%synergy
Syphon Mind
7.4%inclusion2 decks27 decks
-5%synergy
Geth's Summons
7.4%inclusion2 decks27 decks
7%synergy
Splinter's Technique
5.3%inclusion1 decks19 decks
3%synergy
Utility Artifacts
Bontu's Monument
56%inclusion15 decks27 decks
28%synergy
Herald's Horn
56%inclusion15 decks27 decks
50%synergy
Skullclamp
52%inclusion14 decks27 decks
30%synergy
Contagion Clasp
22%inclusion6 decks27 decks
20%synergy
Thrumming Stone
22%inclusion6 decks27 decks
18%synergy
Chronicle of Victory
20%inclusion4 decks20 decks
17%synergy
Icon of Ancestry
19%inclusion5 decks27 decks
18%synergy
Ashnod's Altar
15%inclusion4 decks27 decks
-5%synergy
Expedition Map
15%inclusion4 decks27 decks
4%synergy
Lightning Greaves
15%inclusion4 decks27 decks
-19%synergy
Wayfarer's Bauble
11%inclusion3 decks27 decks
-3%synergy
Whip of Erebos
11%inclusion3 decks27 decks
0%synergy
Coat of Arms
11%inclusion3 decks27 decks
9%synergy
Banner of Kinship
11%inclusion3 decks27 decks
9%synergy
Vanquisher's Banner
11%inclusion3 decks27 decks
7%synergy
Blade of Selves
11%inclusion3 decks27 decks
10%synergy
Swiftfoot Boots
11%inclusion3 decks27 decks
-20%synergy
Grafted Exoskeleton
11%inclusion3 decks27 decks
10%synergy
The Darkness Crystal
7.7%inclusion2 decks26 decks
-12%synergy
Vat of Rebirth
7.4%inclusion2 decks27 decks
4%synergy
Contagion Engine
7.4%inclusion2 decks27 decks
6%synergy
Pyre of Heroes
7.4%inclusion2 decks27 decks
7%synergy
Helm of the Host
7.4%inclusion2 decks27 decks
6%synergy
Sword of Hearth and Home
7.4%inclusion2 decks27 decks
6%synergy
Door of Destinies
7.4%inclusion2 decks27 decks
5%synergy
Enchantments
Cover of Darkness
48%inclusion13 decks27 decks
45%synergy
Necrogen Communion
48%inclusion13 decks27 decks
46%synergy
Phyrexian Arena
30%inclusion8 decks27 decks
-10%synergy
Black Market Connections
26%inclusion7 decks27 decks
1%synergy
Phyresis
22%inclusion6 decks27 decks
20%synergy
Oversold Cemetery
22%inclusion6 decks27 decks
17%synergy
Haunted One
19%inclusion5 decks27 decks
16%synergy
Bad Moon
15%inclusion4 decks27 decks
12%synergy
Glistening Oil
11%inclusion3 decks27 decks
10%synergy
Grave Pact
11%inclusion3 decks27 decks
-8%synergy
Tribute to Horobi
11%inclusion3 decks27 decks
10%synergy
Intimidation
11%inclusion3 decks27 decks
11%synergy
Lord Skitter's Blessing
11%inclusion3 decks27 decks
10%synergy
Black Market
7.4%inclusion2 decks27 decks
-13%synergy
Phyrexian Reclamation
7.4%inclusion2 decks27 decks
-2%synergy
Kaya's Ghostform
7.4%inclusion2 decks27 decks
-3%synergy
Animate Dead
7.4%inclusion2 decks27 decks
-10%synergy
Oubliette
7.4%inclusion2 decks27 decks
5%synergy
Planeswalkers
Vraska, Betrayal's Sting
30%inclusion8 decks27 decks
27%synergy
Liliana of the Dark Realms
11%inclusion3 decks27 decks
-3%synergy
Utility Lands
Swarmyard
67%inclusion18 decks27 decks
61%synergy
Bojuka Bog
63%inclusion17 decks27 decks
16%synergy
Cabal Coffers
59%inclusion16 decks27 decks
5%synergy
Rogue's Passage
52%inclusion14 decks27 decks
32%synergy
Witch's Cottage
44%inclusion12 decks27 decks
20%synergy
Mudflat Village
37%inclusion10 decks27 decks
34%synergy
Nykthos, Shrine to Nyx
30%inclusion8 decks27 decks
-0%synergy
Urborg, Tomb of Yawgmoth
30%inclusion8 decks27 decks
-8%synergy
Mortuary Mire
26%inclusion7 decks27 decks
13%synergy
Reliquary Tower
26%inclusion7 decks27 decks
-4%synergy
Cabal Stronghold
22%inclusion6 decks27 decks
-12%synergy
Three Tree City
22%inclusion6 decks27 decks
17%synergy
War Room
19%inclusion5 decks27 decks
3%synergy
Phyrexian Tower
15%inclusion4 decks27 decks
-11%synergy
Barren Moor
15%inclusion4 decks27 decks
6%synergy
Takenuma, Abandoned Mire
15%inclusion4 decks27 decks
-1%synergy
Crypt of Agadeem
11%inclusion3 decks27 decks
-0%synergy
Castle Locthwain
11%inclusion3 decks27 decks
-5%synergy
Access Tunnel
11%inclusion3 decks27 decks
8%synergy
Desert of the Glorified
7.4%inclusion2 decks27 decks
5%synergy
Inkmoth Nexus
7.4%inclusion2 decks27 decks
6%synergy
Spymaster's Vault
7.4%inclusion2 decks27 decks
-2%synergy
The Dross Pits
7.4%inclusion2 decks27 decks
6%synergy
Polluted Mire
7.4%inclusion2 decks27 decks
4%synergy
Peat Bog
7.4%inclusion2 decks27 decks
5%synergy
Mana Artifacts
Sol Ring
93%inclusion25 decks27 decks
7%synergy
Arcane Signet
52%inclusion14 decks27 decks
-10%synergy
Glistening Sphere
41%inclusion11 decks27 decks
40%synergy
Patchwork Banner
19%inclusion5 decks27 decks
14%synergy
Charcoal Diamond
11%inclusion3 decks27 decks
-11%synergy
Thought Vessel
11%inclusion3 decks27 decks
-13%synergy
The Soul Stone
8.3%inclusion2 decks24 decks
-7%synergy
Staff of Compleation
7.4%inclusion2 decks27 decks
6%synergy
Heraldic Banner
7.4%inclusion2 decks27 decks
2%synergy
Throne of Eldraine
7.4%inclusion2 decks27 decks
-2%synergy
Worn Powerstone
7.4%inclusion2 decks27 decks
3%synergy
Phyrexian Atlas
7.4%inclusion2 decks27 decks
7%synergy
Mind Stone
7.4%inclusion2 decks27 decks
-20%synergy
Firdoch Core
5.0%inclusion1 decks20 decks
5%synergy
Lands
Swamp
100%inclusion27 decks27 decks
5%synergy
Path of Ancestry
52%inclusion14 decks27 decks
47%synergy
Malakir Rebirth
26%inclusion7 decks27 decks
2%synergy
Command Tower
19%inclusion5 decks27 decks
13%synergy
Cavern of Souls
19%inclusion5 decks27 decks
12%synergy
Big Apple, 3 a.m.
17%inclusion3 decks18 decks
15%synergy
Evolving Wilds
15%inclusion4 decks27 decks
11%synergy
Hagra Mauling
11%inclusion3 decks27 decks
7%synergy
Terramorphic Expanse
11%inclusion3 decks27 decks
8%synergy
Escape Tunnel
7.4%inclusion2 decks27 decks
6%synergy
Fell the Profane
7.4%inclusion2 decks27 decks
-12%synergy
The Seedcore
7.4%inclusion2 decks27 decks
7%synergy
Myriad Landscape
7.4%inclusion2 decks27 decks
-17%synergy
Urza's Cave
7.4%inclusion2 decks27 decks
-1%synergy
Mirrex
7.4%inclusion2 decks27 decks
7%synergy
Ash Barrens
7.4%inclusion2 decks27 decks
6%synergy
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