Karumonix, the Rat King (Commander) - Upgraded Rats

Karumonix, the Rat King
Rank #401
28decks
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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Sorceries
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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Piper of the Swarm
93%inclusion26 decks28 decks
86%synergy
Blightbelly Rat
89%inclusion25 decks28 decks
86%synergy
Ichor Rats
86%inclusion24 decks28 decks
83%synergy
Marrow-Gnawer
86%inclusion24 decks28 decks
82%synergy
Ogre Slumlord
86%inclusion24 decks28 decks
76%synergy
Infectious Inquiry
79%inclusion22 decks28 decks
76%synergy
Lord Skitter, Sewer King
79%inclusion22 decks28 decks
70%synergy
Septic Rats
71%inclusion20 decks28 decks
70%synergy
Vraska's Fall
71%inclusion20 decks28 decks
68%synergy
Tangled Colony
68%inclusion19 decks28 decks
65%synergy
Top Cards
Dark Ritual
68%inclusion19 decks28 decks
1%synergy
Drown in Ichor
68%inclusion19 decks28 decks
64%synergy
Bontu's Monument
64%inclusion18 decks28 decks
36%synergy
Herald's Horn
64%inclusion18 decks28 decks
59%synergy
Jet Medallion
64%inclusion18 decks28 decks
2%synergy
Pack Rat
61%inclusion17 decks28 decks
55%synergy
Lord Skitter's Butcher
61%inclusion17 decks28 decks
58%synergy
Rancid Rats
57%inclusion16 decks28 decks
55%synergy
Burglar Rat
57%inclusion16 decks28 decks
47%synergy
Crypt Rats
57%inclusion16 decks28 decks
53%synergy
Game Changers
Vampiric Tutor
39%inclusion11 decks28 decks
18%synergy
Demonic Tutor
32%inclusion9 decks28 decks
5%synergy
Bolas's Citadel
11%inclusion3 decks28 decks
-18%synergy
Creatures
Stronghold Rats
57%inclusion16 decks28 decks
54%synergy
Persistent Marshstalker
54%inclusion15 decks28 decks
51%synergy
Ashcoat of the Shadow Swarm
54%inclusion15 decks28 decks
50%synergy
Typhoid Rats
54%inclusion15 decks28 decks
50%synergy
Chittering Skitterling
50%inclusion14 decks28 decks
49%synergy
Voracious Vermin
50%inclusion14 decks28 decks
47%synergy
Nezumi Informant
50%inclusion14 decks28 decks
44%synergy
Rat Colony
50%inclusion14 decks28 decks
44%synergy
Rat King, Pale Piper
47%inclusion8 decks17 decks
43%synergy
Ratcatcher
46%inclusion13 decks28 decks
43%synergy
Gnat Miser
46%inclusion13 decks28 decks
44%synergy
Ink-Eyes, Servant of Oni
39%inclusion11 decks28 decks
36%synergy
Wave of Rats
39%inclusion11 decks28 decks
38%synergy
Nashi, Moon Sage's Scion
39%inclusion11 decks28 decks
36%synergy
Ayara, First of Locthwain
36%inclusion10 decks28 decks
10%synergy
Throat Slitter
36%inclusion10 decks28 decks
34%synergy
Locust Miser
32%inclusion9 decks28 decks
31%synergy
Nezumi Prowler
32%inclusion9 decks28 decks
31%synergy
Rat King, Verminister
32%inclusion6 decks19 decks
28%synergy
Gnawing Vermin
29%inclusion8 decks28 decks
27%synergy
Gray Merchant of Asphodel
29%inclusion8 decks28 decks
-22%synergy
Changeling Outcast
29%inclusion8 decks28 decks
24%synergy
Pestilence Rats
29%inclusion8 decks28 decks
27%synergy
Undercity Dire Rat
27%inclusion7 decks26 decks
25%synergy
Swarm of Rats
25%inclusion7 decks28 decks
23%synergy
Chittering Witch
25%inclusion7 decks28 decks
21%synergy
Species Specialist
21%inclusion6 decks28 decks
18%synergy
Twisted Sewer-Witch
21%inclusion6 decks28 decks
20%synergy
Nezumi Cutthroat
21%inclusion6 decks28 decks
21%synergy
Ravenous Rats
18%inclusion5 decks28 decks
16%synergy
Valley Rotcaller
18%inclusion5 decks28 decks
15%synergy
Crypt Ghast
18%inclusion5 decks28 decks
-29%synergy
Okiba-Gang Shinobi
18%inclusion5 decks28 decks
17%synergy
Ruin Rat
18%inclusion5 decks28 decks
17%synergy
Bog Rats
14%inclusion4 decks28 decks
14%synergy
Relentless Rats
14%inclusion4 decks28 decks
13%synergy
Drainpipe Vermin
14%inclusion4 decks28 decks
13%synergy
Splinter, Hamato Yoshi
12%inclusion2 decks17 decks
11%synergy
Patron of the Nezumi
11%inclusion3 decks28 decks
10%synergy
Rotting Rats
11%inclusion3 decks28 decks
8%synergy
Skullsnatcher
11%inclusion3 decks28 decks
10%synergy
Adaptive Automaton
11%inclusion3 decks28 decks
10%synergy
Razortooth Rats
11%inclusion3 decks28 decks
10%synergy
Engine Rat
11%inclusion3 decks28 decks
9%synergy
Yawgmoth, Thran Physician
11%inclusion3 decks28 decks
1%synergy
Nezumi Bone-Reader
11%inclusion3 decks28 decks
10%synergy
Refurbished Familiar
7.1%inclusion2 decks28 decks
5%synergy
Chittering Rats
7.1%inclusion2 decks28 decks
7%synergy
Nezumi Graverobber
7.1%inclusion2 decks28 decks
6%synergy
Midnight Scavengers
7.1%inclusion2 decks28 decks
7%synergy
Instants
Whisper of the Dross
50%inclusion14 decks28 decks
47%synergy
Go for the Throat
43%inclusion12 decks28 decks
20%synergy
Village Rites
39%inclusion11 decks28 decks
14%synergy
Rat Out
29%inclusion8 decks28 decks
27%synergy
Grim Affliction
29%inclusion8 decks28 decks
27%synergy
Deadly Dispute
29%inclusion8 decks28 decks
2%synergy
Defile
29%inclusion8 decks28 decks
-7%synergy
Malakir Rebirth
25%inclusion7 decks28 decks
2%synergy
Deadly Rollick
21%inclusion6 decks28 decks
-4%synergy
Culling the Weak
21%inclusion6 decks28 decks
4%synergy
Tainted Strike
21%inclusion6 decks28 decks
18%synergy
Anoint with Affliction
18%inclusion5 decks28 decks
17%synergy
Tragic Slip
18%inclusion5 decks28 decks
-1%synergy
Hagra Mauling
14%inclusion4 decks28 decks
10%synergy
Sheoldred's Edict
14%inclusion4 decks28 decks
-1%synergy
Snuff Out
14%inclusion4 decks28 decks
1%synergy
Extinguish the Light
14%inclusion4 decks28 decks
14%synergy
Infernal Grasp
14%inclusion4 decks28 decks
-11%synergy
Corrupted Conviction
14%inclusion4 decks28 decks
2%synergy
Sudden Spoiling
14%inclusion4 decks28 decks
6%synergy
Withering Torment
14%inclusion4 decks28 decks
-17%synergy
Fell the Profane
11%inclusion3 decks28 decks
-9%synergy
Murder
11%inclusion3 decks28 decks
1%synergy
Unbury
10%inclusion2 decks20 decks
9%synergy
Force of Despair
7.1%inclusion2 decks28 decks
-0%synergy
Imp's Mischief
7.1%inclusion2 decks28 decks
-18%synergy
Cabal Ritual
7.1%inclusion2 decks28 decks
-12%synergy
Supernatural Stamina
7.1%inclusion2 decks28 decks
-0%synergy
Altar's Reap
7.1%inclusion2 decks28 decks
5%synergy
Virulent Wound
7.1%inclusion2 decks28 decks
7%synergy
Undying Malice
7.1%inclusion2 decks28 decks
-3%synergy
Darkness
7.1%inclusion2 decks28 decks
-3%synergy
Plumb the Forbidden
7.1%inclusion2 decks28 decks
3%synergy
Gravepurge
7.1%inclusion2 decks28 decks
6%synergy
Feign Death
7.1%inclusion2 decks28 decks
-1%synergy
Sorceries
Revenge of the Rats
46%inclusion13 decks28 decks
43%synergy
Phyresis Outbreak
43%inclusion12 decks28 decks
41%synergy
Patriarch's Bidding
39%inclusion11 decks28 decks
35%synergy
Crippling Fear
39%inclusion11 decks28 decks
36%synergy
Sign in Blood
32%inclusion9 decks28 decks
-3%synergy
Night's Whisper
29%inclusion8 decks28 decks
3%synergy
Feed the Swarm
25%inclusion7 decks28 decks
-25%synergy
Kindred Dominance
25%inclusion7 decks28 decks
20%synergy
Bloodline Bidding
25%inclusion5 decks20 decks
21%synergy
Vat Emergence
21%inclusion6 decks28 decks
20%synergy
Feed the Infection
21%inclusion6 decks28 decks
21%synergy
Spread the Sickness
18%inclusion5 decks28 decks
17%synergy
Bubbling Muck
18%inclusion5 decks28 decks
2%synergy
Echoing Return
18%inclusion5 decks28 decks
15%synergy
Toxic Deluge
18%inclusion5 decks28 decks
-19%synergy
Shredder's Technique
17%inclusion3 decks18 decks
14%synergy
Diabolic Intent
14%inclusion4 decks28 decks
-1%synergy
Unearth
14%inclusion4 decks28 decks
5%synergy
Swarmyard Massacre
14%inclusion4 decks28 decks
12%synergy
Reanimate
14%inclusion4 decks28 decks
-26%synergy
Damnation
14%inclusion4 decks28 decks
-6%synergy
Diabolic Tutor
11%inclusion3 decks28 decks
-3%synergy
Profane Tutor
11%inclusion3 decks28 decks
7%synergy
Read the Bones
11%inclusion3 decks28 decks
-5%synergy
Exsanguinate
11%inclusion3 decks28 decks
-14%synergy
Grim Tutor
11%inclusion3 decks28 decks
-1%synergy
Pact of the Serpent
11%inclusion3 decks28 decks
9%synergy
Black Sun's Zenith
7.1%inclusion2 decks28 decks
2%synergy
Psychic Whorl
7.1%inclusion2 decks28 decks
7%synergy
Caress of Phyrexia
7.1%inclusion2 decks28 decks
7%synergy
Decree of Pain
7.1%inclusion2 decks28 decks
2%synergy
Syphon Mind
7.1%inclusion2 decks28 decks
-5%synergy
Geth's Summons
7.1%inclusion2 decks28 decks
7%synergy
Plague of Vermin
7.1%inclusion2 decks28 decks
5%synergy
Utility Artifacts
Skullclamp
50%inclusion14 decks28 decks
28%synergy
Vanquisher's Banner
21%inclusion6 decks28 decks
18%synergy
Thrumming Stone
21%inclusion6 decks28 decks
17%synergy
Chronicle of Victory
20%inclusion4 decks20 decks
17%synergy
Icon of Ancestry
18%inclusion5 decks28 decks
17%synergy
Contagion Clasp
18%inclusion5 decks28 decks
16%synergy
Ashnod's Altar
18%inclusion5 decks28 decks
-2%synergy
Wayfarer's Bauble
14%inclusion4 decks28 decks
-0%synergy
Expedition Map
14%inclusion4 decks28 decks
3%synergy
Lightning Greaves
14%inclusion4 decks28 decks
-20%synergy
Whip of Erebos
11%inclusion3 decks28 decks
-0%synergy
Coat of Arms
11%inclusion3 decks28 decks
8%synergy
Sword of Hearth and Home
11%inclusion3 decks28 decks
9%synergy
Door of Destinies
11%inclusion3 decks28 decks
9%synergy
Blade of Selves
11%inclusion3 decks28 decks
9%synergy
Swiftfoot Boots
11%inclusion3 decks28 decks
-21%synergy
The Darkness Crystal
7.7%inclusion2 decks26 decks
-12%synergy
Vat of Rebirth
7.1%inclusion2 decks28 decks
4%synergy
Contagion Engine
7.1%inclusion2 decks28 decks
5%synergy
Aetherflux Reservoir
7.1%inclusion2 decks28 decks
-2%synergy
Helm of the Host
7.1%inclusion2 decks28 decks
6%synergy
Banner of Kinship
7.1%inclusion2 decks28 decks
5%synergy
Grafted Exoskeleton
7.1%inclusion2 decks28 decks
6%synergy
Gathering Stone
5.0%inclusion1 decks20 decks
4%synergy
Enchantments
Necrogen Communion
46%inclusion13 decks28 decks
45%synergy
Cover of Darkness
43%inclusion12 decks28 decks
40%synergy
Phyrexian Arena
32%inclusion9 decks28 decks
-7%synergy
Black Market Connections
25%inclusion7 decks28 decks
0%synergy
Oversold Cemetery
25%inclusion7 decks28 decks
20%synergy
Phyresis
21%inclusion6 decks28 decks
19%synergy
Haunted One
18%inclusion5 decks28 decks
15%synergy
Grave Pact
18%inclusion5 decks28 decks
-2%synergy
Black Market
11%inclusion3 decks28 decks
-10%synergy
Glistening Oil
11%inclusion3 decks28 decks
10%synergy
Phyrexian Reclamation
11%inclusion3 decks28 decks
1%synergy
Tribute to Horobi
11%inclusion3 decks28 decks
10%synergy
Intimidation
11%inclusion3 decks28 decks
10%synergy
Lord Skitter's Blessing
11%inclusion3 decks28 decks
10%synergy
Dark Prophecy
11%inclusion3 decks28 decks
7%synergy
Bad Moon
11%inclusion3 decks28 decks
8%synergy
Carnival of Souls
7.1%inclusion2 decks28 decks
6%synergy
Kaya's Ghostform
7.1%inclusion2 decks28 decks
-3%synergy
Animate Dead
7.1%inclusion2 decks28 decks
-10%synergy
Oubliette
7.1%inclusion2 decks28 decks
4%synergy
Planeswalkers
Vraska, Betrayal's Sting
25%inclusion7 decks28 decks
22%synergy
Liliana of the Dark Realms
14%inclusion4 decks28 decks
1%synergy
Utility Lands
Bojuka Bog
68%inclusion19 decks28 decks
21%synergy
Swarmyard
68%inclusion19 decks28 decks
62%synergy
Karn's Bastion
68%inclusion19 decks28 decks
64%synergy
Cabal Coffers
64%inclusion18 decks28 decks
10%synergy
Rogue's Passage
50%inclusion14 decks28 decks
31%synergy
Witch's Cottage
39%inclusion11 decks28 decks
15%synergy
Mudflat Village
39%inclusion11 decks28 decks
37%synergy
Nykthos, Shrine to Nyx
32%inclusion9 decks28 decks
2%synergy
Cabal Stronghold
29%inclusion8 decks28 decks
-6%synergy
Reliquary Tower
29%inclusion8 decks28 decks
-1%synergy
Urborg, Tomb of Yawgmoth
29%inclusion8 decks28 decks
-9%synergy
Mortuary Mire
25%inclusion7 decks28 decks
12%synergy
Three Tree City
25%inclusion7 decks28 decks
20%synergy
War Room
18%inclusion5 decks28 decks
2%synergy
Barren Moor
14%inclusion4 decks28 decks
5%synergy
Crypt of Agadeem
14%inclusion4 decks28 decks
3%synergy
Takenuma, Abandoned Mire
14%inclusion4 decks28 decks
-1%synergy
Phyrexian Tower
11%inclusion3 decks28 decks
-15%synergy
Castle Locthwain
11%inclusion3 decks28 decks
-6%synergy
Access Tunnel
11%inclusion3 decks28 decks
8%synergy
Shizo, Death's Storehouse
7.1%inclusion2 decks28 decks
-3%synergy
Desert of the Glorified
7.1%inclusion2 decks28 decks
5%synergy
Inkmoth Nexus
7.1%inclusion2 decks28 decks
6%synergy
Spymaster's Vault
7.1%inclusion2 decks28 decks
-3%synergy
The Dross Pits
7.1%inclusion2 decks28 decks
6%synergy
Polluted Mire
7.1%inclusion2 decks28 decks
4%synergy
Peat Bog
7.1%inclusion2 decks28 decks
5%synergy
Temple of the False God
7.1%inclusion2 decks28 decks
-1%synergy
Mana Artifacts
Sol Ring
89%inclusion25 decks28 decks
4%synergy
Arcane Signet
46%inclusion13 decks28 decks
-15%synergy
Glistening Sphere
43%inclusion12 decks28 decks
42%synergy
Patchwork Banner
21%inclusion6 decks28 decks
17%synergy
Charcoal Diamond
14%inclusion4 decks28 decks
-8%synergy
The Soul Stone
8.3%inclusion2 decks24 decks
-7%synergy
Staff of Compleation
7.1%inclusion2 decks28 decks
6%synergy
Heraldic Banner
7.1%inclusion2 decks28 decks
2%synergy
Throne of Eldraine
7.1%inclusion2 decks28 decks
-2%synergy
Thought Vessel
7.1%inclusion2 decks28 decks
-18%synergy
Phyrexian Atlas
7.1%inclusion2 decks28 decks
7%synergy
Mind Stone
7.1%inclusion2 decks28 decks
-21%synergy
Sceptre of Eternal Glory
7.1%inclusion2 decks28 decks
-1%synergy
Firdoch Core
5.0%inclusion1 decks20 decks
5%synergy
Lands
Swamp
100%inclusion28 decks28 decks
5%synergy
Path of Ancestry
54%inclusion15 decks28 decks
49%synergy
Malakir Rebirth
25%inclusion7 decks28 decks
2%synergy
Cavern of Souls
21%inclusion6 decks28 decks
15%synergy
Command Tower
18%inclusion5 decks28 decks
12%synergy
Evolving Wilds
18%inclusion5 decks28 decks
14%synergy
Hagra Mauling
14%inclusion4 decks28 decks
10%synergy
Big Apple, 3 a.m.
12%inclusion2 decks17 decks
10%synergy
Fell the Profane
11%inclusion3 decks28 decks
-9%synergy
Terramorphic Expanse
11%inclusion3 decks28 decks
8%synergy
Myriad Landscape
11%inclusion3 decks28 decks
-14%synergy
Escape Tunnel
7.1%inclusion2 decks28 decks
6%synergy
Mirrex
7.1%inclusion2 decks28 decks
7%synergy
Ash Barrens
7.1%inclusion2 decks28 decks
6%synergy
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