Karumonix, the Rat King (Commander) - Upgraded Rats

Karumonix, the Rat King
Rank #407
28decks
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
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Utility Lands
Mana Artifacts
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Blightbelly Rat
89%inclusion25 decks28 decks
86%synergy
Ichor Rats
86%inclusion24 decks28 decks
83%synergy
Piper of the Swarm
89%inclusion25 decks28 decks
83%synergy
Marrow-Gnawer
86%inclusion24 decks28 decks
82%synergy
Lord Skitter, Sewer King
82%inclusion23 decks28 decks
74%synergy
Ogre Slumlord
79%inclusion22 decks28 decks
69%synergy
Infectious Inquiry
71%inclusion20 decks28 decks
69%synergy
Septic Rats
68%inclusion19 decks28 decks
66%synergy
Tangled Colony
68%inclusion19 decks28 decks
65%synergy
Karn's Bastion
68%inclusion19 decks28 decks
64%synergy
Top Cards
Jet Medallion
64%inclusion18 decks28 decks
2%synergy
Vraska's Fall
64%inclusion18 decks28 decks
61%synergy
Drown in Ichor
61%inclusion17 decks28 decks
57%synergy
Dark Ritual
61%inclusion17 decks28 decks
-7%synergy
Burglar Rat
57%inclusion16 decks28 decks
47%synergy
Pack Rat
57%inclusion16 decks28 decks
51%synergy
Bontu's Monument
57%inclusion16 decks28 decks
29%synergy
Stronghold Rats
57%inclusion16 decks28 decks
54%synergy
Crypt Rats
57%inclusion16 decks28 decks
53%synergy
Lord Skitter's Butcher
54%inclusion15 decks28 decks
51%synergy
Game Changers
Vampiric Tutor
36%inclusion10 decks28 decks
15%synergy
Demonic Tutor
32%inclusion9 decks28 decks
5%synergy
Bolas's Citadel
11%inclusion3 decks28 decks
-17%synergy
Creatures
Persistent Marshstalker
54%inclusion15 decks28 decks
51%synergy
Voracious Vermin
54%inclusion15 decks28 decks
51%synergy
Ashcoat of the Shadow Swarm
54%inclusion15 decks28 decks
50%synergy
Rancid Rats
54%inclusion15 decks28 decks
51%synergy
Rat Colony
54%inclusion15 decks28 decks
48%synergy
Ratcatcher
50%inclusion14 decks28 decks
47%synergy
Typhoid Rats
50%inclusion14 decks28 decks
46%synergy
Nezumi Informant
46%inclusion13 decks28 decks
40%synergy
Gnat Miser
46%inclusion13 decks28 decks
44%synergy
Ayara, First of Locthwain
43%inclusion12 decks28 decks
18%synergy
Ink-Eyes, Servant of Oni
43%inclusion12 decks28 decks
40%synergy
Chittering Skitterling
43%inclusion12 decks28 decks
42%synergy
Wave of Rats
43%inclusion12 decks28 decks
41%synergy
Nashi, Moon Sage's Scion
39%inclusion11 decks28 decks
36%synergy
Rat King, Pale Piper
37%inclusion7 decks19 decks
33%synergy
Throat Slitter
36%inclusion10 decks28 decks
34%synergy
Rat King, Verminister
30%inclusion6 decks20 decks
27%synergy
Gray Merchant of Asphodel
29%inclusion8 decks28 decks
-22%synergy
Locust Miser
29%inclusion8 decks28 decks
27%synergy
Chittering Witch
29%inclusion8 decks28 decks
24%synergy
Changeling Outcast
29%inclusion8 decks28 decks
24%synergy
Nezumi Prowler
29%inclusion8 decks28 decks
27%synergy
Undercity Dire Rat
26%inclusion7 decks27 decks
24%synergy
Gnawing Vermin
25%inclusion7 decks28 decks
24%synergy
Pestilence Rats
25%inclusion7 decks28 decks
23%synergy
Ravenous Rats
21%inclusion6 decks28 decks
20%synergy
Species Specialist
21%inclusion6 decks28 decks
18%synergy
Swarm of Rats
21%inclusion6 decks28 decks
19%synergy
Twisted Sewer-Witch
21%inclusion6 decks28 decks
20%synergy
Nezumi Cutthroat
21%inclusion6 decks28 decks
21%synergy
Valley Rotcaller
18%inclusion5 decks28 decks
15%synergy
Crypt Ghast
18%inclusion5 decks28 decks
-29%synergy
Drainpipe Vermin
18%inclusion5 decks28 decks
17%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
Rotting Rats
14%inclusion4 decks28 decks
11%synergy
Filth
14%inclusion4 decks28 decks
12%synergy
Patron of the Nezumi
11%inclusion3 decks28 decks
10%synergy
Relentless Rats
11%inclusion3 decks28 decks
9%synergy
Skullsnatcher
11%inclusion3 decks28 decks
10%synergy
Adaptive Automaton
11%inclusion3 decks28 decks
10%synergy
Zodiac Rat
11%inclusion3 decks28 decks
11%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
Emeritus of Woe
7.7%inclusion1 decks13 decks
1%synergy
Chittering Rats
7.1%inclusion2 decks28 decks
7%synergy
Nezumi Graverobber
7.1%inclusion2 decks28 decks
6%synergy
Instants
Whisper of the Dross
46%inclusion13 decks28 decks
44%synergy
Village Rites
39%inclusion11 decks28 decks
14%synergy
Go for the Throat
32%inclusion9 decks28 decks
10%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
25%inclusion7 decks28 decks
-10%synergy
Culling the Weak
25%inclusion7 decks28 decks
7%synergy
Malakir Rebirth
25%inclusion7 decks28 decks
1%synergy
Deadly Rollick
21%inclusion6 decks28 decks
-4%synergy
Tainted Strike
21%inclusion6 decks28 decks
18%synergy
Anoint with Affliction
18%inclusion5 decks28 decks
17%synergy
Sheoldred's Edict
14%inclusion4 decks28 decks
-1%synergy
Snuff Out
14%inclusion4 decks28 decks
0%synergy
Extinguish the Light
14%inclusion4 decks28 decks
14%synergy
Corrupted Conviction
14%inclusion4 decks28 decks
2%synergy
Sudden Spoiling
14%inclusion4 decks28 decks
6%synergy
Tragic Slip
14%inclusion4 decks28 decks
-5%synergy
Withering Torment
14%inclusion4 decks28 decks
-17%synergy
Hagra Mauling
11%inclusion3 decks28 decks
6%synergy
Infernal Grasp
11%inclusion3 decks28 decks
-15%synergy
Unbury
10%inclusion2 decks21 decks
9%synergy
Hero's Downfall
7.1%inclusion2 decks28 decks
1%synergy
Fell the Profane
7.1%inclusion2 decks28 decks
-13%synergy
Force of Despair
7.1%inclusion2 decks28 decks
-0%synergy
Imp's Mischief
7.1%inclusion2 decks28 decks
-18%synergy
Flare of Malice
7.1%inclusion2 decks28 decks
-6%synergy
Cabal Ritual
7.1%inclusion2 decks28 decks
-12%synergy
Supernatural Stamina
7.1%inclusion2 decks28 decks
-1%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
Murder
7.1%inclusion2 decks28 decks
-3%synergy
Foul-Tongue Shriek
7.1%inclusion2 decks28 decks
5%synergy
Plumb the Forbidden
7.1%inclusion2 decks28 decks
3%synergy
Feign Death
7.1%inclusion2 decks28 decks
-1%synergy
Sorceries
Patriarch's Bidding
43%inclusion12 decks28 decks
39%synergy
Revenge of the Rats
43%inclusion12 decks28 decks
40%synergy
Phyresis Outbreak
43%inclusion12 decks28 decks
41%synergy
Crippling Fear
39%inclusion11 decks28 decks
36%synergy
Vat Emergence
29%inclusion8 decks28 decks
27%synergy
Sign in Blood
29%inclusion8 decks28 decks
-6%synergy
Kindred Dominance
29%inclusion8 decks28 decks
24%synergy
Bloodline Bidding
29%inclusion6 decks21 decks
25%synergy
Feed the Infection
25%inclusion7 decks28 decks
24%synergy
Feed the Swarm
25%inclusion7 decks28 decks
-25%synergy
Night's Whisper
25%inclusion7 decks28 decks
-0%synergy
Spread the Sickness
21%inclusion6 decks28 decks
21%synergy
Toxic Deluge
21%inclusion6 decks28 decks
-15%synergy
Bubbling Muck
18%inclusion5 decks28 decks
2%synergy
Swarmyard Massacre
18%inclusion5 decks28 decks
15%synergy
Shredder's Technique
16%inclusion3 decks19 decks
13%synergy
Diabolic Tutor
14%inclusion4 decks28 decks
1%synergy
Unearth
14%inclusion4 decks28 decks
5%synergy
Reanimate
14%inclusion4 decks28 decks
-26%synergy
Damnation
14%inclusion4 decks28 decks
-6%synergy
Plague of Vermin
14%inclusion4 decks28 decks
12%synergy
Pact of the Serpent
14%inclusion4 decks28 decks
13%synergy
Diabolic Intent
11%inclusion3 decks28 decks
-4%synergy
Profane Tutor
11%inclusion3 decks28 decks
7%synergy
Echoing Return
11%inclusion3 decks28 decks
8%synergy
Read the Bones
11%inclusion3 decks28 decks
-5%synergy
Exsanguinate
11%inclusion3 decks28 decks
-14%synergy
Caress of Phyrexia
11%inclusion3 decks28 decks
10%synergy
Grim Tutor
11%inclusion3 decks28 decks
-1%synergy
Black Sun's Zenith
7.1%inclusion2 decks28 decks
2%synergy
Victimize
7.1%inclusion2 decks28 decks
-20%synergy
Mutilate
7.1%inclusion2 decks28 decks
-8%synergy
Blasphemous Edict
7.1%inclusion2 decks28 decks
-9%synergy
Decree of Pain
7.1%inclusion2 decks28 decks
2%synergy
Living Death
7.1%inclusion2 decks28 decks
-3%synergy
Syphon Mind
7.1%inclusion2 decks28 decks
-5%synergy
Geth's Summons
7.1%inclusion2 decks28 decks
7%synergy
Secret Salvage
7.1%inclusion2 decks28 decks
6%synergy
Splinter's Technique
5.0%inclusion1 decks20 decks
3%synergy
Utility Artifacts
Herald's Horn
54%inclusion15 decks28 decks
48%synergy
Skullclamp
50%inclusion14 decks28 decks
28%synergy
Thrumming Stone
25%inclusion7 decks28 decks
21%synergy
Contagion Clasp
21%inclusion6 decks28 decks
19%synergy
Chronicle of Victory
19%inclusion4 decks21 decks
16%synergy
Icon of Ancestry
18%inclusion5 decks28 decks
17%synergy
Ashnod's Altar
18%inclusion5 decks28 decks
-2%synergy
Expedition Map
14%inclusion4 decks28 decks
3%synergy
Lightning Greaves
14%inclusion4 decks28 decks
-20%synergy
Grafted Exoskeleton
14%inclusion4 decks28 decks
13%synergy
Wayfarer's Bauble
11%inclusion3 decks28 decks
-4%synergy
Whip of Erebos
11%inclusion3 decks28 decks
-0%synergy
Coat of Arms
11%inclusion3 decks28 decks
8%synergy
Banner of Kinship
11%inclusion3 decks28 decks
9%synergy
Vanquisher's Banner
11%inclusion3 decks28 decks
7%synergy
Blade of Selves
11%inclusion3 decks28 decks
9%synergy
Swiftfoot Boots
11%inclusion3 decks28 decks
-21%synergy
The Darkness Crystal
7.4%inclusion2 decks27 decks
-13%synergy
Vat of Rebirth
7.1%inclusion2 decks28 decks
4%synergy
Skeleton Key
7.1%inclusion2 decks28 decks
7%synergy
Contagion Engine
7.1%inclusion2 decks28 decks
5%synergy
Pyre of Heroes
7.1%inclusion2 decks28 decks
7%synergy
Helm of the Host
7.1%inclusion2 decks28 decks
6%synergy
Sword of Hearth and Home
7.1%inclusion2 decks28 decks
6%synergy
Door of Destinies
7.1%inclusion2 decks28 decks
5%synergy
Enchantments
Cover of Darkness
46%inclusion13 decks28 decks
43%synergy
Necrogen Communion
46%inclusion13 decks28 decks
45%synergy
Phyrexian Arena
32%inclusion9 decks28 decks
-7%synergy
Black Market Connections
25%inclusion7 decks28 decks
0%synergy
Phyresis
21%inclusion6 decks28 decks
19%synergy
Oversold Cemetery
21%inclusion6 decks28 decks
16%synergy
Haunted One
18%inclusion5 decks28 decks
15%synergy
Bad Moon
14%inclusion4 decks28 decks
11%synergy
Glistening Oil
11%inclusion3 decks28 decks
10%synergy
Grave Pact
11%inclusion3 decks28 decks
-9%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
Black Market
7.1%inclusion2 decks28 decks
-13%synergy
Phyrexian Reclamation
7.1%inclusion2 decks28 decks
-3%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
29%inclusion8 decks28 decks
26%synergy
Liliana of the Dark Realms
11%inclusion3 decks28 decks
-3%synergy
Utility Lands
Swarmyard
64%inclusion18 decks28 decks
59%synergy
Bojuka Bog
61%inclusion17 decks28 decks
14%synergy
Cabal Coffers
61%inclusion17 decks28 decks
6%synergy
Rogue's Passage
50%inclusion14 decks28 decks
31%synergy
Witch's Cottage
43%inclusion12 decks28 decks
18%synergy
Mudflat Village
36%inclusion10 decks28 decks
33%synergy
Nykthos, Shrine to Nyx
29%inclusion8 decks28 decks
-1%synergy
Urborg, Tomb of Yawgmoth
29%inclusion8 decks28 decks
-9%synergy
Cabal Stronghold
25%inclusion7 decks28 decks
-9%synergy
Mortuary Mire
25%inclusion7 decks28 decks
12%synergy
Reliquary Tower
25%inclusion7 decks28 decks
-4%synergy
Three Tree City
21%inclusion6 decks28 decks
17%synergy
War Room
18%inclusion5 decks28 decks
2%synergy
Phyrexian Tower
14%inclusion4 decks28 decks
-12%synergy
Barren Moor
14%inclusion4 decks28 decks
5%synergy
Takenuma, Abandoned Mire
14%inclusion4 decks28 decks
-1%synergy
Crypt of Agadeem
11%inclusion3 decks28 decks
-1%synergy
Castle Locthwain
11%inclusion3 decks28 decks
-6%synergy
Access Tunnel
11%inclusion3 decks28 decks
8%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
Mana Artifacts
Sol Ring
93%inclusion26 decks28 decks
7%synergy
Arcane Signet
54%inclusion15 decks28 decks
-8%synergy
Glistening Sphere
39%inclusion11 decks28 decks
38%synergy
Patchwork Banner
18%inclusion5 decks28 decks
13%synergy
Charcoal Diamond
11%inclusion3 decks28 decks
-11%synergy
Thought Vessel
11%inclusion3 decks28 decks
-14%synergy
Mind Stone
11%inclusion3 decks28 decks
-17%synergy
The Soul Stone
8.0%inclusion2 decks25 decks
-8%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
Worn Powerstone
7.1%inclusion2 decks28 decks
3%synergy
Phyrexian Atlas
7.1%inclusion2 decks28 decks
7%synergy
Lands
Swamp
100%inclusion28 decks28 decks
5%synergy
Path of Ancestry
50%inclusion14 decks28 decks
45%synergy
Malakir Rebirth
25%inclusion7 decks28 decks
1%synergy
Command Tower
18%inclusion5 decks28 decks
12%synergy
Cavern of Souls
18%inclusion5 decks28 decks
11%synergy
Big Apple, 3 a.m.
16%inclusion3 decks19 decks
14%synergy
Evolving Wilds
14%inclusion4 decks28 decks
10%synergy
Hagra Mauling
11%inclusion3 decks28 decks
6%synergy
Terramorphic Expanse
11%inclusion3 decks28 decks
8%synergy
Escape Tunnel
7.1%inclusion2 decks28 decks
6%synergy
Fell the Profane
7.1%inclusion2 decks28 decks
-13%synergy
The Seedcore
7.1%inclusion2 decks28 decks
7%synergy
Myriad Landscape
7.1%inclusion2 decks28 decks
-17%synergy
Urza's Cave
7.1%inclusion2 decks28 decks
-1%synergy
Mirrex
7.1%inclusion2 decks28 decks
7%synergy
Ash Barrens
7.1%inclusion2 decks28 decks
6%synergy
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