Karumonix, the Rat King (Commander) - Upgraded Infect

Karumonix, the Rat King
Rank #407
91decks
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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Blightbelly Rat
86%inclusion78 decks91 decks
82%synergy
Marrow-Gnawer
85%inclusion77 decks91 decks
81%synergy
Piper of the Swarm
84%inclusion76 decks91 decks
77%synergy
Ichor Rats
79%inclusion72 decks91 decks
76%synergy
Infectious Inquiry
76%inclusion69 decks91 decks
73%synergy
Drown in Ichor
75%inclusion68 decks91 decks
71%synergy
Ogre Slumlord
79%inclusion72 decks91 decks
70%synergy
Pack Rat
74%inclusion67 decks91 decks
68%synergy
Lord Skitter, Sewer King
75%inclusion68 decks91 decks
67%synergy
Swarmyard
71%inclusion65 decks91 decks
66%synergy
Top Cards
Dark Ritual
74%inclusion67 decks91 decks
6%synergy
Vraska's Fall
68%inclusion62 decks91 decks
65%synergy
Septic Rats
67%inclusion61 decks91 decks
65%synergy
Bontu's Monument
65%inclusion59 decks91 decks
37%synergy
Rancid Rats
63%inclusion57 decks91 decks
60%synergy
Persistent Marshstalker
59%inclusion54 decks91 decks
56%synergy
Jet Medallion
59%inclusion54 decks91 decks
-3%synergy
Typhoid Rats
59%inclusion54 decks91 decks
56%synergy
Lord Skitter's Butcher
59%inclusion54 decks91 decks
56%synergy
Whisper of the Dross
57%inclusion52 decks91 decks
55%synergy
Game Changers
Demonic Tutor
33%inclusion30 decks91 decks
6%synergy
Bolas's Citadel
21%inclusion19 decks91 decks
-7%synergy
Vampiric Tutor
20%inclusion18 decks91 decks
-1%synergy
Necropotence
6.6%inclusion6 decks91 decks
-8%synergy
Creatures
Tangled Colony
57%inclusion52 decks91 decks
54%synergy
Crypt Rats
56%inclusion51 decks91 decks
52%synergy
Stronghold Rats
54%inclusion49 decks91 decks
50%synergy
Voracious Vermin
49%inclusion45 decks91 decks
47%synergy
Rat Colony
49%inclusion45 decks91 decks
44%synergy
Ratcatcher
46%inclusion42 decks91 decks
43%synergy
Gnat Miser
46%inclusion42 decks91 decks
43%synergy
Ashcoat of the Shadow Swarm
45%inclusion41 decks91 decks
42%synergy
Burglar Rat
44%inclusion40 decks91 decks
34%synergy
Wave of Rats
37%inclusion34 decks91 decks
36%synergy
Changeling Outcast
36%inclusion33 decks91 decks
31%synergy
Ink-Eyes, Servant of Oni
32%inclusion29 decks91 decks
29%synergy
Swarm of Rats
31%inclusion28 decks91 decks
28%synergy
Chittering Skitterling
30%inclusion27 decks91 decks
29%synergy
Ruin Rat
30%inclusion27 decks91 decks
28%synergy
Engine Rat
29%inclusion26 decks91 decks
27%synergy
Throat Slitter
27%inclusion25 decks91 decks
26%synergy
Rat King, Pale Piper
27%inclusion14 decks51 decks
24%synergy
Nezumi Informant
26%inclusion24 decks91 decks
20%synergy
Undercity Dire Rat
25%inclusion20 decks79 decks
24%synergy
Chittering Witch
25%inclusion23 decks91 decks
21%synergy
Nezumi Cutthroat
25%inclusion23 decks91 decks
25%synergy
Nashi, Moon Sage's Scion
25%inclusion23 decks91 decks
22%synergy
Rat King, Verminister
25%inclusion13 decks53 decks
21%synergy
Species Specialist
24%inclusion22 decks91 decks
21%synergy
Valley Rotcaller
24%inclusion22 decks91 decks
21%synergy
Nezumi Prowler
24%inclusion22 decks91 decks
23%synergy
Pestilence Rats
24%inclusion22 decks91 decks
22%synergy
Ayara, First of Locthwain
21%inclusion19 decks91 decks
-4%synergy
Crypt Ghast
20%inclusion18 decks91 decks
-27%synergy
Gnawing Vermin
19%inclusion17 decks91 decks
17%synergy
Locust Miser
19%inclusion17 decks91 decks
17%synergy
Rotting Rats
18%inclusion16 decks91 decks
15%synergy
Twisted Sewer-Witch
18%inclusion16 decks91 decks
16%synergy
Drainpipe Vermin
16%inclusion15 decks91 decks
15%synergy
Gray Merchant of Asphodel
15%inclusion14 decks91 decks
-35%synergy
Ravenous Rats
14%inclusion13 decks91 decks
13%synergy
Razortooth Rats
14%inclusion13 decks91 decks
14%synergy
Refurbished Familiar
13%inclusion12 decks91 decks
11%synergy
Relentless Rats
13%inclusion12 decks91 decks
11%synergy
Nezumi Graverobber
13%inclusion12 decks91 decks
12%synergy
Elephant-Rat
13%inclusion9 decks71 decks
12%synergy
Bog Rats
12%inclusion11 decks91 decks
12%synergy
Zodiac Rat
12%inclusion11 decks91 decks
12%synergy
Nezumi Bladeblesser
11%inclusion10 decks91 decks
10%synergy
Skullsnatcher
11%inclusion10 decks91 decks
10%synergy
Okiba-Gang Shinobi
11%inclusion10 decks91 decks
10%synergy
Chittering Rats
8.8%inclusion8 decks91 decks
8%synergy
Mukotai Ambusher
8.8%inclusion8 decks91 decks
8%synergy
Filth
8.8%inclusion8 decks91 decks
6%synergy
Instants
Village Rites
40%inclusion36 decks91 decks
14%synergy
Grim Affliction
36%inclusion33 decks91 decks
34%synergy
Defile
35%inclusion32 decks91 decks
-0%synergy
Go for the Throat
32%inclusion29 decks91 decks
9%synergy
Tainted Strike
32%inclusion29 decks91 decks
29%synergy
Withering Torment
26%inclusion24 decks91 decks
-5%synergy
Rat Out
22%inclusion20 decks91 decks
21%synergy
Murder
22%inclusion20 decks91 decks
12%synergy
Fell the Profane
20%inclusion18 decks91 decks
0%synergy
Deadly Dispute
20%inclusion18 decks91 decks
-7%synergy
Infernal Grasp
19%inclusion17 decks91 decks
-7%synergy
Malakir Rebirth
19%inclusion17 decks91 decks
-5%synergy
Culling the Weak
18%inclusion16 decks91 decks
-0%synergy
Corrupted Conviction
16%inclusion15 decks91 decks
4%synergy
Tragic Slip
15%inclusion14 decks91 decks
-4%synergy
Deadly Rollick
14%inclusion13 decks91 decks
-11%synergy
Anoint with Affliction
14%inclusion13 decks91 decks
14%synergy
Cabal Ritual
13%inclusion12 decks91 decks
-6%synergy
Sheoldred's Edict
10%inclusion9 decks91 decks
-5%synergy
Sudden Spoiling
10%inclusion9 decks91 decks
2%synergy
Virulent Wound
8.8%inclusion8 decks91 decks
8%synergy
Bitter Triumph
8.8%inclusion8 decks91 decks
-1%synergy
Raise the Draugr
8.8%inclusion8 decks91 decks
8%synergy
Hero's Downfall
7.7%inclusion7 decks91 decks
1%synergy
Feign Death
7.7%inclusion7 decks91 decks
-1%synergy
Unbury
7.4%inclusion4 decks54 decks
7%synergy
Hagra Mauling
6.6%inclusion6 decks91 decks
2%synergy
Undying Malice
6.6%inclusion6 decks91 decks
-4%synergy
Imp's Mischief
5.5%inclusion5 decks91 decks
-20%synergy
Not Dead After All
5.5%inclusion5 decks91 decks
-6%synergy
Consuming Corruption
5.5%inclusion5 decks91 decks
-10%synergy
Doom Blade
5.5%inclusion5 decks91 decks
-2%synergy
Altar's Reap
5.5%inclusion5 decks91 decks
3%synergy
Foul-Tongue Shriek
5.5%inclusion5 decks91 decks
4%synergy
Sorceries
Phyresis Outbreak
53%inclusion48 decks91 decks
51%synergy
Revenge of the Rats
38%inclusion35 decks91 decks
35%synergy
Feed the Swarm
35%inclusion32 decks91 decks
-15%synergy
Kindred Dominance
33%inclusion30 decks91 decks
28%synergy
Crippling Fear
31%inclusion28 decks91 decks
28%synergy
Sign in Blood
29%inclusion26 decks91 decks
-6%synergy
Bloodline Bidding
28%inclusion15 decks54 decks
24%synergy
Patriarch's Bidding
27%inclusion25 decks91 decks
24%synergy
Night's Whisper
27%inclusion25 decks91 decks
2%synergy
Vat Emergence
22%inclusion20 decks91 decks
21%synergy
Swarmyard Massacre
22%inclusion20 decks91 decks
20%synergy
Diabolic Intent
19%inclusion17 decks91 decks
4%synergy
Spread the Sickness
19%inclusion17 decks91 decks
18%synergy
Diabolic Tutor
18%inclusion16 decks91 decks
4%synergy
Bubbling Muck
16%inclusion15 decks91 decks
1%synergy
Unearth
16%inclusion15 decks91 decks
8%synergy
Feed the Infection
14%inclusion13 decks91 decks
14%synergy
Toxic Deluge
14%inclusion13 decks91 decks
-23%synergy
Read the Bones
13%inclusion12 decks91 decks
-3%synergy
Echoing Return
12%inclusion11 decks91 decks
9%synergy
Reanimate
12%inclusion11 decks91 decks
-29%synergy
Caress of Phyrexia
11%inclusion10 decks91 decks
10%synergy
Fell
11%inclusion10 decks91 decks
8%synergy
Pact of the Serpent
10%inclusion9 decks91 decks
8%synergy
Blasphemous Edict
8.8%inclusion8 decks91 decks
-7%synergy
In Garruk's Wake
8.8%inclusion8 decks91 decks
5%synergy
Geth's Summons
8.8%inclusion8 decks91 decks
8%synergy
Grim Tutor
8.8%inclusion8 decks91 decks
-3%synergy
Plague of Vermin
8.8%inclusion8 decks91 decks
6%synergy
Eaten Alive
7.7%inclusion7 decks91 decks
4%synergy
Damnation
7.7%inclusion7 decks91 decks
-12%synergy
Insatiable Avarice
6.6%inclusion6 decks91 decks
-4%synergy
Gruesome Fate
6.6%inclusion6 decks91 decks
5%synergy
Splinter's Technique
5.7%inclusion3 decks53 decks
4%synergy
Unmarked Grave
5.5%inclusion5 decks91 decks
1%synergy
Victimize
5.5%inclusion5 decks91 decks
-22%synergy
Profane Tutor
5.5%inclusion5 decks91 decks
1%synergy
Haunting Voyage
5.5%inclusion5 decks91 decks
4%synergy
Exsanguinate
5.5%inclusion5 decks91 decks
-19%synergy
Lab Rats
5.5%inclusion5 decks91 decks
5%synergy
Decorum Dissertation
5.1%inclusion2 decks39 decks
-1%synergy
Utility Artifacts
Herald's Horn
45%inclusion41 decks91 decks
39%synergy
Skullclamp
38%inclusion35 decks91 decks
16%synergy
Contagion Clasp
30%inclusion27 decks91 decks
28%synergy
Vanquisher's Banner
26%inclusion24 decks91 decks
23%synergy
Thrumming Stone
19%inclusion17 decks91 decks
15%synergy
Swiftfoot Boots
19%inclusion17 decks91 decks
-13%synergy
Chronicle of Victory
18%inclusion10 decks55 decks
16%synergy
Contagion Engine
18%inclusion16 decks91 decks
16%synergy
Coat of Arms
16%inclusion15 decks91 decks
14%synergy
Icon of Ancestry
14%inclusion13 decks91 decks
13%synergy
Door of Destinies
14%inclusion13 decks91 decks
12%synergy
Lightning Greaves
14%inclusion13 decks91 decks
-20%synergy
Whip of Erebos
13%inclusion12 decks91 decks
2%synergy
Banner of Kinship
11%inclusion10 decks91 decks
9%synergy
Grafted Exoskeleton
11%inclusion10 decks91 decks
10%synergy
The Darkness Crystal
10%inclusion8 decks79 decks
-10%synergy
Expedition Map
10%inclusion9 decks91 decks
-1%synergy
Gathering Stone
9.3%inclusion5 decks54 decks
8%synergy
Sword of Truth and Justice
7.7%inclusion7 decks91 decks
7%synergy
Wayfarer's Bauble
5.5%inclusion5 decks91 decks
-9%synergy
Akroma's Memorial
5.5%inclusion5 decks91 decks
5%synergy
Enchantments
Cover of Darkness
49%inclusion45 decks91 decks
46%synergy
Necrogen Communion
42%inclusion38 decks91 decks
40%synergy
Phyrexian Arena
34%inclusion31 decks91 decks
-5%synergy
Phyresis
23%inclusion21 decks91 decks
21%synergy
Bad Moon
20%inclusion18 decks91 decks
17%synergy
Haunted One
14%inclusion13 decks91 decks
12%synergy
Grave Pact
14%inclusion13 decks91 decks
-5%synergy
Black Market Connections
14%inclusion13 decks91 decks
-11%synergy
Black Market
13%inclusion12 decks91 decks
-7%synergy
Oversold Cemetery
13%inclusion12 decks91 decks
8%synergy
Phyrexian Reclamation
11%inclusion10 decks91 decks
1%synergy
Glistening Oil
8.8%inclusion8 decks91 decks
8%synergy
Intimidation
8.8%inclusion8 decks91 decks
8%synergy
Tribute to Horobi
6.6%inclusion6 decks91 decks
6%synergy
Kaya's Ghostform
6.6%inclusion6 decks91 decks
-3%synergy
Lord Skitter's Blessing
6.6%inclusion6 decks91 decks
6%synergy
Vampiric Rites
5.5%inclusion5 decks91 decks
-0%synergy
Dictate of Erebos
5.5%inclusion5 decks91 decks
-5%synergy
Planeswalkers
Vraska, Betrayal's Sting
43%inclusion39 decks91 decks
40%synergy
Liliana of the Dark Realms
14%inclusion13 decks91 decks
1%synergy
Utility Lands
Karn's Bastion
64%inclusion58 decks91 decks
60%synergy
Bojuka Bog
58%inclusion53 decks91 decks
11%synergy
Cabal Coffers
54%inclusion49 decks91 decks
-1%synergy
Mudflat Village
52%inclusion47 decks91 decks
49%synergy
Rogue's Passage
51%inclusion46 decks91 decks
31%synergy
Witch's Cottage
34%inclusion31 decks91 decks
10%synergy
Three Tree City
32%inclusion29 decks91 decks
27%synergy
Urborg, Tomb of Yawgmoth
31%inclusion28 decks91 decks
-7%synergy
Mortuary Mire
27%inclusion25 decks91 decks
15%synergy
Nykthos, Shrine to Nyx
25%inclusion23 decks91 decks
-4%synergy
Reliquary Tower
23%inclusion21 decks91 decks
-6%synergy
Cabal Stronghold
21%inclusion19 decks91 decks
-13%synergy
Access Tunnel
21%inclusion19 decks91 decks
18%synergy
Phyrexian Tower
18%inclusion16 decks91 decks
-9%synergy
Secret Tunnel
14%inclusion9 decks63 decks
13%synergy
Crypt of Agadeem
12%inclusion11 decks91 decks
1%synergy
Castle Locthwain
12%inclusion11 decks91 decks
-5%synergy
Barren Moor
11%inclusion10 decks91 decks
2%synergy
War Room
11%inclusion10 decks91 decks
-5%synergy
Takenuma, Abandoned Mire
10%inclusion9 decks91 decks
-6%synergy
Shizo, Death's Storehouse
8.8%inclusion8 decks91 decks
-2%synergy
Temple of the False God
8.8%inclusion8 decks91 decks
1%synergy
Desert of the Glorified
7.7%inclusion7 decks91 decks
5%synergy
Inkmoth Nexus
7.7%inclusion7 decks91 decks
7%synergy
Memorial to Folly
6.6%inclusion6 decks91 decks
4%synergy
Mutavault
6.6%inclusion6 decks91 decks
6%synergy
The Dross Pits
6.6%inclusion6 decks91 decks
5%synergy
Polluted Mire
6.6%inclusion6 decks91 decks
3%synergy
Peat Bog
5.5%inclusion5 decks91 decks
3%synergy
Mana Artifacts
Sol Ring
86%inclusion78 decks91 decks
0%synergy
Arcane Signet
51%inclusion46 decks91 decks
-11%synergy
Glistening Sphere
45%inclusion41 decks91 decks
44%synergy
Patchwork Banner
30%inclusion27 decks91 decks
25%synergy
Staff of Compleation
22%inclusion20 decks91 decks
20%synergy
Heraldic Banner
18%inclusion16 decks91 decks
12%synergy
Charcoal Diamond
15%inclusion14 decks91 decks
-6%synergy
Mind Stone
15%inclusion14 decks91 decks
-12%synergy
The Soul Stone
8.2%inclusion6 decks73 decks
-8%synergy
Thought Vessel
7.7%inclusion7 decks91 decks
-17%synergy
Phyrexian Atlas
7.7%inclusion7 decks91 decks
7%synergy
Caged Sun
5.5%inclusion5 decks91 decks
-5%synergy
Lands
Swamp
99%inclusion90 decks91 decks
4%synergy
Path of Ancestry
41%inclusion37 decks91 decks
36%synergy
Cavern of Souls
23%inclusion21 decks91 decks
16%synergy
Fell the Profane
20%inclusion18 decks91 decks
0%synergy
Malakir Rebirth
19%inclusion17 decks91 decks
-5%synergy
Big Apple, 3 a.m.
16%inclusion8 decks51 decks
14%synergy
Evolving Wilds
14%inclusion13 decks91 decks
10%synergy
Command Tower
13%inclusion12 decks91 decks
7%synergy
Myriad Landscape
13%inclusion12 decks91 decks
-11%synergy
Escape Tunnel
8.8%inclusion8 decks91 decks
8%synergy
Hagra Mauling
6.6%inclusion6 decks91 decks
2%synergy
Urza's Cave
6.6%inclusion6 decks91 decks
-2%synergy
Terramorphic Expanse
5.5%inclusion5 decks91 decks
3%synergy
Ash Barrens
5.5%inclusion5 decks91 decks
4%synergy
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