Karumonix, the Rat King (Commander) - Upgraded Infect

Karumonix, the Rat King
Rank #393
81decks
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
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Decorum Dissertation
4.5%inclusion1 decks22 decks
-1%synergy
Withering Curse
4.0%inclusion1 decks25 decks
2%synergy
High Synergy Cards
Blightbelly Rat
88%inclusion71 decks81 decks
84%synergy
Marrow-Gnawer
81%inclusion66 decks81 decks
78%synergy
Ichor Rats
80%inclusion65 decks81 decks
77%synergy
Piper of the Swarm
84%inclusion68 decks81 decks
77%synergy
Infectious Inquiry
79%inclusion64 decks81 decks
76%synergy
Drown in Ichor
74%inclusion60 decks81 decks
70%synergy
Ogre Slumlord
79%inclusion64 decks81 decks
69%synergy
Pack Rat
74%inclusion60 decks81 decks
68%synergy
Vraska's Fall
70%inclusion57 decks81 decks
67%synergy
Lord Skitter, Sewer King
75%inclusion61 decks81 decks
67%synergy
Top Cards
Dark Ritual
77%inclusion62 decks81 decks
10%synergy
Bontu's Monument
68%inclusion55 decks81 decks
40%synergy
Septic Rats
65%inclusion53 decks81 decks
64%synergy
Rancid Rats
62%inclusion50 decks81 decks
59%synergy
Whisper of the Dross
60%inclusion49 decks81 decks
58%synergy
Jet Medallion
59%inclusion48 decks81 decks
-3%synergy
Lord Skitter's Butcher
57%inclusion46 decks81 decks
54%synergy
Persistent Marshstalker
57%inclusion46 decks81 decks
54%synergy
Typhoid Rats
57%inclusion46 decks81 decks
53%synergy
Tangled Colony
56%inclusion45 decks81 decks
52%synergy
Game Changers
Demonic Tutor
32%inclusion26 decks81 decks
5%synergy
Vampiric Tutor
17%inclusion14 decks81 decks
-4%synergy
Bolas's Citadel
15%inclusion12 decks81 decks
-14%synergy
Creatures
Stronghold Rats
56%inclusion45 decks81 decks
52%synergy
Crypt Rats
54%inclusion44 decks81 decks
50%synergy
Voracious Vermin
49%inclusion40 decks81 decks
46%synergy
Rat Colony
48%inclusion39 decks81 decks
43%synergy
Ashcoat of the Shadow Swarm
44%inclusion36 decks81 decks
41%synergy
Gnat Miser
44%inclusion36 decks81 decks
42%synergy
Burglar Rat
43%inclusion35 decks81 decks
32%synergy
Ratcatcher
43%inclusion35 decks81 decks
40%synergy
Wave of Rats
38%inclusion31 decks81 decks
36%synergy
Changeling Outcast
33%inclusion27 decks81 decks
28%synergy
Rat King, Pale Piper
33%inclusion12 decks36 decks
29%synergy
Ruin Rat
32%inclusion26 decks81 decks
31%synergy
Ink-Eyes, Servant of Oni
30%inclusion24 decks81 decks
26%synergy
Swarm of Rats
30%inclusion24 decks81 decks
27%synergy
Chittering Skitterling
30%inclusion24 decks81 decks
29%synergy
Throat Slitter
28%inclusion23 decks81 decks
27%synergy
Nezumi Informant
28%inclusion23 decks81 decks
22%synergy
Engine Rat
27%inclusion22 decks81 decks
25%synergy
Chittering Witch
27%inclusion22 decks81 decks
23%synergy
Undercity Dire Rat
26%inclusion18 decks69 decks
24%synergy
Nezumi Cutthroat
26%inclusion21 decks81 decks
25%synergy
Nezumi Prowler
26%inclusion21 decks81 decks
25%synergy
Nashi, Moon Sage's Scion
26%inclusion21 decks81 decks
22%synergy
Valley Rotcaller
23%inclusion19 decks81 decks
21%synergy
Pestilence Rats
23%inclusion19 decks81 decks
21%synergy
Rat King, Verminister
23%inclusion9 decks40 decks
19%synergy
Ayara, First of Locthwain
22%inclusion18 decks81 decks
-3%synergy
Species Specialist
22%inclusion18 decks81 decks
19%synergy
Crypt Ghast
22%inclusion18 decks81 decks
-25%synergy
Gnawing Vermin
20%inclusion16 decks81 decks
18%synergy
Rotting Rats
19%inclusion15 decks81 decks
15%synergy
Gray Merchant of Asphodel
19%inclusion15 decks81 decks
-32%synergy
Locust Miser
19%inclusion15 decks81 decks
17%synergy
Twisted Sewer-Witch
17%inclusion14 decks81 decks
16%synergy
Refurbished Familiar
16%inclusion13 decks81 decks
14%synergy
Razortooth Rats
16%inclusion13 decks81 decks
15%synergy
Drainpipe Vermin
16%inclusion13 decks81 decks
15%synergy
Nezumi Graverobber
14%inclusion11 decks81 decks
12%synergy
Ravenous Rats
14%inclusion11 decks81 decks
12%synergy
Elephant-Rat
13%inclusion8 decks60 decks
13%synergy
Bog Rats
12%inclusion10 decks81 decks
12%synergy
Relentless Rats
12%inclusion10 decks81 decks
11%synergy
Nezumi Bladeblesser
12%inclusion10 decks81 decks
12%synergy
Okiba-Gang Shinobi
12%inclusion10 decks81 decks
11%synergy
Chittering Rats
10%inclusion8 decks81 decks
9%synergy
Ruthless Radrat
10%inclusion8 decks81 decks
9%synergy
Skullsnatcher
10%inclusion8 decks81 decks
9%synergy
Sinuous Vermin
10%inclusion8 decks81 decks
9%synergy
Mukotai Ambusher
8.6%inclusion7 decks81 decks
8%synergy
Filth
8.6%inclusion7 decks81 decks
6%synergy
Instants
Grim Affliction
40%inclusion32 decks81 decks
38%synergy
Village Rites
36%inclusion29 decks81 decks
10%synergy
Defile
36%inclusion29 decks81 decks
-0%synergy
Go for the Throat
33%inclusion27 decks81 decks
11%synergy
Tainted Strike
32%inclusion26 decks81 decks
29%synergy
Withering Torment
26%inclusion21 decks81 decks
-5%synergy
Rat Out
22%inclusion18 decks81 decks
21%synergy
Deadly Dispute
20%inclusion16 decks81 decks
-7%synergy
Infernal Grasp
20%inclusion16 decks81 decks
-5%synergy
Fell the Profane
19%inclusion15 decks81 decks
-1%synergy
Murder
19%inclusion15 decks81 decks
9%synergy
Malakir Rebirth
16%inclusion13 decks81 decks
-7%synergy
Deadly Rollick
15%inclusion12 decks81 decks
-10%synergy
Corrupted Conviction
15%inclusion12 decks81 decks
2%synergy
Tragic Slip
15%inclusion12 decks81 decks
-5%synergy
Anoint with Affliction
14%inclusion11 decks81 decks
13%synergy
Cabal Ritual
11%inclusion9 decks81 decks
-7%synergy
Culling the Weak
11%inclusion9 decks81 decks
-6%synergy
Sudden Spoiling
10%inclusion8 decks81 decks
1%synergy
Unbury
10%inclusion4 decks42 decks
9%synergy
Hero's Downfall
8.6%inclusion7 decks81 decks
2%synergy
Sheoldred's Edict
8.6%inclusion7 decks81 decks
-6%synergy
Hagra Mauling
7.4%inclusion6 decks81 decks
3%synergy
Consuming Corruption
7.4%inclusion6 decks81 decks
-8%synergy
Virulent Wound
7.4%inclusion6 decks81 decks
7%synergy
Bitter Triumph
6.2%inclusion5 decks81 decks
-4%synergy
Raise the Draugr
6.2%inclusion5 decks81 decks
5%synergy
Foul-Tongue Shriek
6.2%inclusion5 decks81 decks
4%synergy
Feign Death
6.2%inclusion5 decks81 decks
-2%synergy
Sorceries
Phyresis Outbreak
56%inclusion45 decks81 decks
54%synergy
Revenge of the Rats
40%inclusion32 decks81 decks
36%synergy
Feed the Swarm
36%inclusion29 decks81 decks
-15%synergy
Kindred Dominance
31%inclusion25 decks81 decks
26%synergy
Night's Whisper
30%inclusion24 decks81 decks
5%synergy
Crippling Fear
30%inclusion24 decks81 decks
27%synergy
Patriarch's Bidding
27%inclusion22 decks81 decks
23%synergy
Sign in Blood
27%inclusion22 decks81 decks
-8%synergy
Bloodline Bidding
24%inclusion10 decks42 decks
20%synergy
Vat Emergence
21%inclusion17 decks81 decks
20%synergy
Spread the Sickness
21%inclusion17 decks81 decks
20%synergy
Swarmyard Massacre
21%inclusion17 decks81 decks
19%synergy
Diabolic Intent
16%inclusion13 decks81 decks
1%synergy
Diabolic Tutor
16%inclusion13 decks81 decks
2%synergy
Unearth
15%inclusion12 decks81 decks
6%synergy
Echoing Return
15%inclusion12 decks81 decks
12%synergy
Read the Bones
15%inclusion12 decks81 decks
-2%synergy
Bubbling Muck
14%inclusion11 decks81 decks
-2%synergy
Feed the Infection
12%inclusion10 decks81 decks
12%synergy
Fell
12%inclusion10 decks81 decks
9%synergy
Reanimate
12%inclusion10 decks81 decks
-28%synergy
Toxic Deluge
12%inclusion10 decks81 decks
-24%synergy
Caress of Phyrexia
11%inclusion9 decks81 decks
10%synergy
Pact of the Serpent
11%inclusion9 decks81 decks
9%synergy
Geth's Summons
10%inclusion8 decks81 decks
9%synergy
In Garruk's Wake
8.6%inclusion7 decks81 decks
5%synergy
Plague of Vermin
8.6%inclusion7 decks81 decks
6%synergy
Profane Tutor
7.4%inclusion6 decks81 decks
3%synergy
Blasphemous Edict
7.4%inclusion6 decks81 decks
-9%synergy
Insatiable Avarice
7.4%inclusion6 decks81 decks
-4%synergy
Damnation
7.4%inclusion6 decks81 decks
-13%synergy
Haunting Voyage
6.2%inclusion5 decks81 decks
5%synergy
Exsanguinate
6.2%inclusion5 decks81 decks
-19%synergy
Eaten Alive
6.2%inclusion5 decks81 decks
3%synergy
Grim Tutor
6.2%inclusion5 decks81 decks
-5%synergy
Shredder's Technique
5.4%inclusion2 decks37 decks
2%synergy
Splinter's Technique
5.0%inclusion2 decks40 decks
3%synergy
Utility Artifacts
Herald's Horn
48%inclusion39 decks81 decks
42%synergy
Skullclamp
40%inclusion32 decks81 decks
17%synergy
Contagion Clasp
30%inclusion24 decks81 decks
27%synergy
Vanquisher's Banner
25%inclusion20 decks81 decks
21%synergy
Thrumming Stone
21%inclusion17 decks81 decks
17%synergy
Contagion Engine
17%inclusion14 decks81 decks
15%synergy
Swiftfoot Boots
17%inclusion14 decks81 decks
-14%synergy
Chronicle of Victory
16%inclusion7 decks43 decks
13%synergy
Coat of Arms
16%inclusion13 decks81 decks
13%synergy
Icon of Ancestry
14%inclusion11 decks81 decks
13%synergy
Door of Destinies
12%inclusion10 decks81 decks
10%synergy
Lightning Greaves
12%inclusion10 decks81 decks
-21%synergy
Grafted Exoskeleton
12%inclusion10 decks81 decks
11%synergy
Gathering Stone
12%inclusion5 decks42 decks
11%synergy
The Darkness Crystal
12%inclusion8 decks69 decks
-8%synergy
Whip of Erebos
11%inclusion9 decks81 decks
0%synergy
Expedition Map
10%inclusion8 decks81 decks
-2%synergy
Sword of Truth and Justice
8.6%inclusion7 decks81 decks
8%synergy
Banner of Kinship
7.4%inclusion6 decks81 decks
5%synergy
Wayfarer's Bauble
6.2%inclusion5 decks81 decks
-9%synergy
Sword of the Squeak
6.2%inclusion5 decks81 decks
6%synergy
Enchantments
Cover of Darkness
48%inclusion39 decks81 decks
45%synergy
Necrogen Communion
43%inclusion35 decks81 decks
41%synergy
Phyrexian Arena
35%inclusion28 decks81 decks
-5%synergy
Phyresis
23%inclusion19 decks81 decks
21%synergy
Bad Moon
20%inclusion16 decks81 decks
17%synergy
Black Market
16%inclusion13 decks81 decks
-5%synergy
Haunted One
16%inclusion13 decks81 decks
13%synergy
Grave Pact
15%inclusion12 decks81 decks
-5%synergy
Black Market Connections
14%inclusion11 decks81 decks
-11%synergy
Oversold Cemetery
12%inclusion10 decks81 decks
7%synergy
Phyrexian Reclamation
10%inclusion8 decks81 decks
0%synergy
Glistening Oil
8.6%inclusion7 decks81 decks
8%synergy
Intimidation
8.6%inclusion7 decks81 decks
8%synergy
Tribute to Horobi
7.4%inclusion6 decks81 decks
6%synergy
Vampiric Rites
6.2%inclusion5 decks81 decks
0%synergy
Dictate of Erebos
6.2%inclusion5 decks81 decks
-5%synergy
Lord Skitter's Blessing
6.2%inclusion5 decks81 decks
5%synergy
Planeswalkers
Vraska, Betrayal's Sting
46%inclusion37 decks81 decks
43%synergy
Liliana of the Dark Realms
17%inclusion14 decks81 decks
3%synergy
Utility Lands
Swarmyard
72%inclusion58 decks81 decks
66%synergy
Bojuka Bog
62%inclusion50 decks81 decks
15%synergy
Karn's Bastion
62%inclusion50 decks81 decks
58%synergy
Cabal Coffers
54%inclusion44 decks81 decks
-0%synergy
Mudflat Village
53%inclusion43 decks81 decks
50%synergy
Rogue's Passage
48%inclusion39 decks81 decks
29%synergy
Three Tree City
35%inclusion28 decks81 decks
30%synergy
Witch's Cottage
31%inclusion25 decks81 decks
6%synergy
Urborg, Tomb of Yawgmoth
31%inclusion25 decks81 decks
-7%synergy
Mortuary Mire
27%inclusion22 decks81 decks
14%synergy
Reliquary Tower
25%inclusion20 decks81 decks
-5%synergy
Cabal Stronghold
23%inclusion19 decks81 decks
-11%synergy
Nykthos, Shrine to Nyx
23%inclusion19 decks81 decks
-6%synergy
Access Tunnel
20%inclusion16 decks81 decks
17%synergy
Phyrexian Tower
15%inclusion12 decks81 decks
-11%synergy
Secret Tunnel
14%inclusion7 decks51 decks
13%synergy
Crypt of Agadeem
14%inclusion11 decks81 decks
2%synergy
Barren Moor
12%inclusion10 decks81 decks
3%synergy
War Room
11%inclusion9 decks81 decks
-5%synergy
Castle Locthwain
11%inclusion9 decks81 decks
-6%synergy
Desert of the Glorified
8.6%inclusion7 decks81 decks
6%synergy
Inkmoth Nexus
8.6%inclusion7 decks81 decks
8%synergy
Takenuma, Abandoned Mire
8.6%inclusion7 decks81 decks
-7%synergy
Temple of the False God
8.6%inclusion7 decks81 decks
1%synergy
The Dross Pits
7.4%inclusion6 decks81 decks
6%synergy
Polluted Mire
7.4%inclusion6 decks81 decks
4%synergy
Shizo, Death's Storehouse
6.2%inclusion5 decks81 decks
-4%synergy
Mutavault
6.2%inclusion5 decks81 decks
5%synergy
Mana Artifacts
Sol Ring
86%inclusion70 decks81 decks
1%synergy
Arcane Signet
49%inclusion40 decks81 decks
-12%synergy
Glistening Sphere
44%inclusion36 decks81 decks
43%synergy
Patchwork Banner
27%inclusion22 decks81 decks
23%synergy
Staff of Compleation
23%inclusion19 decks81 decks
22%synergy
Heraldic Banner
17%inclusion14 decks81 decks
12%synergy
Charcoal Diamond
15%inclusion12 decks81 decks
-7%synergy
Mind Stone
15%inclusion12 decks81 decks
-14%synergy
The Soul Stone
10%inclusion6 decks62 decks
-5%synergy
Thought Vessel
7.4%inclusion6 decks81 decks
-18%synergy
Phyrexian Atlas
6.2%inclusion5 decks81 decks
6%synergy
Lands
Swamp
99%inclusion80 decks81 decks
4%synergy
Path of Ancestry
42%inclusion34 decks81 decks
37%synergy
Cavern of Souls
25%inclusion20 decks81 decks
18%synergy
Fell the Profane
19%inclusion15 decks81 decks
-1%synergy
Big Apple, 3 a.m.
17%inclusion6 decks36 decks
15%synergy
Malakir Rebirth
16%inclusion13 decks81 decks
-7%synergy
Command Tower
12%inclusion10 decks81 decks
7%synergy
Evolving Wilds
12%inclusion10 decks81 decks
9%synergy
Myriad Landscape
11%inclusion9 decks81 decks
-14%synergy
Hagra Mauling
7.4%inclusion6 decks81 decks
3%synergy
Escape Tunnel
7.4%inclusion6 decks81 decks
6%synergy
Ash Barrens
6.2%inclusion5 decks81 decks
5%synergy
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