Karumonix, the Rat King (Commander) - Upgraded Infect

Karumonix, the Rat King
Rank #385
75decks
As CommanderAs CardAverage DeckDecks
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Budget
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Background image for Building Rat Typal With Marrow-Gnawer
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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Rat King, Pale Piper
40%inclusion10 decks25 decks
36%synergy
Rat King, Verminister
17%inclusion5 decks29 decks
14%synergy
Big Apple, 3 a.m.
12%inclusion3 decks25 decks
10%synergy
Shredder's Technique
12%inclusion3 decks26 decks
8%synergy
Tunnel Rats
4.2%inclusion1 decks24 decks
4%synergy
High Synergy Cards
Blightbelly Rat
89%inclusion67 decks75 decks
86%synergy
Ichor Rats
85%inclusion64 decks75 decks
82%synergy
Marrow-Gnawer
83%inclusion62 decks75 decks
79%synergy
Infectious Inquiry
81%inclusion61 decks75 decks
79%synergy
Piper of the Swarm
84%inclusion63 decks75 decks
77%synergy
Drown in Ichor
77%inclusion58 decks75 decks
73%synergy
Lord Skitter, Sewer King
80%inclusion60 decks75 decks
72%synergy
Pack Rat
77%inclusion58 decks75 decks
71%synergy
Ogre Slumlord
80%inclusion60 decks75 decks
70%synergy
Vraska's Fall
71%inclusion53 decks75 decks
67%synergy
Top Cards
Dark Ritual
75%inclusion56 decks75 decks
8%synergy
Septic Rats
67%inclusion50 decks75 decks
65%synergy
Bontu's Monument
64%inclusion48 decks75 decks
36%synergy
Rancid Rats
63%inclusion47 decks75 decks
60%synergy
Whisper of the Dross
59%inclusion44 decks75 decks
56%synergy
Lord Skitter's Butcher
59%inclusion44 decks75 decks
55%synergy
Jet Medallion
59%inclusion44 decks75 decks
-3%synergy
Phyresis Outbreak
57%inclusion43 decks75 decks
56%synergy
Tangled Colony
56%inclusion42 decks75 decks
53%synergy
Typhoid Rats
56%inclusion42 decks75 decks
52%synergy
Game Changers
Demonic Tutor
31%inclusion23 decks75 decks
3%synergy
Vampiric Tutor
20%inclusion15 decks75 decks
-1%synergy
Bolas's Citadel
17%inclusion13 decks75 decks
-11%synergy
Necropotence
6.7%inclusion5 decks75 decks
-8%synergy
Creatures
Stronghold Rats
56%inclusion42 decks75 decks
52%synergy
Crypt Rats
55%inclusion41 decks75 decks
50%synergy
Persistent Marshstalker
55%inclusion41 decks75 decks
52%synergy
Gnat Miser
48%inclusion36 decks75 decks
45%synergy
Rat Colony
47%inclusion35 decks75 decks
41%synergy
Voracious Vermin
45%inclusion34 decks75 decks
42%synergy
Ratcatcher
45%inclusion34 decks75 decks
42%synergy
Burglar Rat
44%inclusion33 decks75 decks
33%synergy
Ashcoat of the Shadow Swarm
41%inclusion31 decks75 decks
38%synergy
Wave of Rats
40%inclusion30 decks75 decks
38%synergy
Changeling Outcast
35%inclusion26 decks75 decks
30%synergy
Ruin Rat
32%inclusion24 decks75 decks
31%synergy
Throat Slitter
31%inclusion23 decks75 decks
29%synergy
Ink-Eyes, Servant of Oni
31%inclusion23 decks75 decks
27%synergy
Chittering Skitterling
31%inclusion23 decks75 decks
30%synergy
Swarm of Rats
29%inclusion22 decks75 decks
27%synergy
Nezumi Informant
29%inclusion22 decks75 decks
23%synergy
Chittering Witch
28%inclusion21 decks75 decks
24%synergy
Pestilence Rats
28%inclusion21 decks75 decks
26%synergy
Nezumi Prowler
27%inclusion20 decks75 decks
25%synergy
Nashi, Moon Sage's Scion
27%inclusion20 decks75 decks
23%synergy
Undercity Dire Rat
25%inclusion15 decks61 decks
23%synergy
Ayara, First of Locthwain
23%inclusion17 decks75 decks
-3%synergy
Species Specialist
23%inclusion17 decks75 decks
19%synergy
Valley Rotcaller
23%inclusion17 decks75 decks
20%synergy
Crypt Ghast
23%inclusion17 decks75 decks
-25%synergy
Gnawing Vermin
21%inclusion16 decks75 decks
20%synergy
Engine Rat
21%inclusion16 decks75 decks
20%synergy
Nezumi Cutthroat
21%inclusion16 decks75 decks
21%synergy
Locust Miser
20%inclusion15 decks75 decks
18%synergy
Rotting Rats
19%inclusion14 decks75 decks
15%synergy
Twisted Sewer-Witch
19%inclusion14 decks75 decks
17%synergy
Gray Merchant of Asphodel
17%inclusion13 decks75 decks
-34%synergy
Razortooth Rats
16%inclusion12 decks75 decks
15%synergy
Refurbished Familiar
15%inclusion11 decks75 decks
12%synergy
Nezumi Graverobber
15%inclusion11 decks75 decks
13%synergy
Ravenous Rats
15%inclusion11 decks75 decks
13%synergy
Drainpipe Vermin
15%inclusion11 decks75 decks
13%synergy
Bog Rats
13%inclusion10 decks75 decks
13%synergy
Skullsnatcher
13%inclusion10 decks75 decks
13%synergy
Filth
12%inclusion9 decks75 decks
10%synergy
Yawgmoth, Thran Physician
12%inclusion9 decks75 decks
2%synergy
Okiba-Gang Shinobi
12%inclusion9 decks75 decks
11%synergy
Chittering Rats
11%inclusion8 decks75 decks
10%synergy
Nezumi Bladeblesser
11%inclusion8 decks75 decks
10%synergy
Sinuous Vermin
11%inclusion8 decks75 decks
10%synergy
Elephant-Rat
10%inclusion5 decks51 decks
9%synergy
Relentless Rats
9.3%inclusion7 decks75 decks
8%synergy
Ruthless Radrat
9.3%inclusion7 decks75 decks
9%synergy
Mukotai Ambusher
9.3%inclusion7 decks75 decks
8%synergy
Instants
Grim Affliction
40%inclusion30 decks75 decks
38%synergy
Defile
37%inclusion28 decks75 decks
1%synergy
Go for the Throat
36%inclusion27 decks75 decks
13%synergy
Village Rites
36%inclusion27 decks75 decks
11%synergy
Tainted Strike
33%inclusion25 decks75 decks
30%synergy
Withering Torment
25%inclusion19 decks75 decks
-6%synergy
Rat Out
24%inclusion18 decks75 decks
23%synergy
Deadly Dispute
24%inclusion18 decks75 decks
-2%synergy
Infernal Grasp
24%inclusion18 decks75 decks
-1%synergy
Murder
19%inclusion14 decks75 decks
9%synergy
Corrupted Conviction
19%inclusion14 decks75 decks
6%synergy
Fell the Profane
16%inclusion12 decks75 decks
-3%synergy
Anoint with Affliction
16%inclusion12 decks75 decks
15%synergy
Malakir Rebirth
16%inclusion12 decks75 decks
-7%synergy
Deadly Rollick
15%inclusion11 decks75 decks
-10%synergy
Tragic Slip
15%inclusion11 decks75 decks
-5%synergy
Cabal Ritual
13%inclusion10 decks75 decks
-5%synergy
Sudden Spoiling
11%inclusion8 decks75 decks
2%synergy
Unbury
10%inclusion3 decks31 decks
9%synergy
Hero's Downfall
9.3%inclusion7 decks75 decks
3%synergy
Sheoldred's Edict
9.3%inclusion7 decks75 decks
-5%synergy
Not Dead After All
9.3%inclusion7 decks75 decks
-2%synergy
Culling the Weak
9.3%inclusion7 decks75 decks
-6%synergy
Virulent Wound
8.0%inclusion6 decks75 decks
8%synergy
Feign Death
8.0%inclusion6 decks75 decks
0%synergy
Hagra Mauling
6.7%inclusion5 decks75 decks
2%synergy
Consuming Corruption
6.7%inclusion5 decks75 decks
-9%synergy
Foul-Tongue Shriek
6.7%inclusion5 decks75 decks
5%synergy
Force of Despair
5.3%inclusion4 decks75 decks
-2%synergy
Imp's Mischief
5.3%inclusion4 decks75 decks
-19%synergy
Extinguish the Light
5.3%inclusion4 decks75 decks
5%synergy
Bitter Triumph
5.3%inclusion4 decks75 decks
-4%synergy
Raise the Draugr
5.3%inclusion4 decks75 decks
4%synergy
Sorceries
Revenge of the Rats
39%inclusion29 decks75 decks
36%synergy
Feed the Swarm
37%inclusion28 decks75 decks
-13%synergy
Kindred Dominance
32%inclusion24 decks75 decks
27%synergy
Patriarch's Bidding
29%inclusion22 decks75 decks
25%synergy
Night's Whisper
29%inclusion22 decks75 decks
5%synergy
Crippling Fear
29%inclusion22 decks75 decks
26%synergy
Bloodline Bidding
29%inclusion9 decks31 decks
24%synergy
Sign in Blood
28%inclusion21 decks75 decks
-8%synergy
Spread the Sickness
21%inclusion16 decks75 decks
21%synergy
Swarmyard Massacre
21%inclusion16 decks75 decks
19%synergy
Diabolic Intent
20%inclusion15 decks75 decks
5%synergy
Vat Emergence
20%inclusion15 decks75 decks
19%synergy
Read the Bones
17%inclusion13 decks75 decks
0%synergy
Diabolic Tutor
16%inclusion12 decks75 decks
2%synergy
Feed the Infection
16%inclusion12 decks75 decks
15%synergy
Unearth
16%inclusion12 decks75 decks
7%synergy
Echoing Return
16%inclusion12 decks75 decks
13%synergy
Toxic Deluge
16%inclusion12 decks75 decks
-21%synergy
Bubbling Muck
15%inclusion11 decks75 decks
-1%synergy
Reanimate
15%inclusion11 decks75 decks
-25%synergy
Fell
12%inclusion9 decks75 decks
8%synergy
Caress of Phyrexia
11%inclusion8 decks75 decks
10%synergy
Geth's Summons
11%inclusion8 decks75 decks
10%synergy
In Garruk's Wake
9.3%inclusion7 decks75 decks
5%synergy
Insatiable Avarice
9.3%inclusion7 decks75 decks
-2%synergy
Damnation
9.3%inclusion7 decks75 decks
-11%synergy
Pact of the Serpent
9.3%inclusion7 decks75 decks
8%synergy
Profane Tutor
8.0%inclusion6 decks75 decks
4%synergy
Grim Tutor
8.0%inclusion6 decks75 decks
-4%synergy
Unmarked Grave
6.7%inclusion5 decks75 decks
2%synergy
Mutilate
6.7%inclusion5 decks75 decks
-11%synergy
Blasphemous Edict
6.7%inclusion5 decks75 decks
-10%synergy
Plague of Vermin
6.7%inclusion5 decks75 decks
4%synergy
Haunting Voyage
5.3%inclusion4 decks75 decks
4%synergy
Exsanguinate
5.3%inclusion4 decks75 decks
-19%synergy
Syphon Mind
5.3%inclusion4 decks75 decks
-7%synergy
Lab Rats
5.3%inclusion4 decks75 decks
5%synergy
Gruesome Fate
5.3%inclusion4 decks75 decks
3%synergy
Rise of the Dark Realms
5.3%inclusion4 decks75 decks
-8%synergy
Utility Artifacts
Herald's Horn
49%inclusion37 decks75 decks
44%synergy
Skullclamp
40%inclusion30 decks75 decks
18%synergy
Contagion Clasp
28%inclusion21 decks75 decks
26%synergy
Vanquisher's Banner
25%inclusion19 decks75 decks
21%synergy
Thrumming Stone
23%inclusion17 decks75 decks
19%synergy
Swiftfoot Boots
19%inclusion14 decks75 decks
-13%synergy
Coat of Arms
17%inclusion13 decks75 decks
15%synergy
Contagion Engine
16%inclusion12 decks75 decks
14%synergy
Icon of Ancestry
15%inclusion11 decks75 decks
14%synergy
Expedition Map
15%inclusion11 decks75 decks
3%synergy
Grafted Exoskeleton
15%inclusion11 decks75 decks
14%synergy
The Darkness Crystal
13%inclusion8 decks61 decks
-7%synergy
Whip of Erebos
12%inclusion9 decks75 decks
1%synergy
Door of Destinies
12%inclusion9 decks75 decks
10%synergy
Chronicle of Victory
9.4%inclusion3 decks32 decks
6%synergy
Sword of Truth and Justice
9.3%inclusion7 decks75 decks
9%synergy
Banner of Kinship
9.3%inclusion7 decks75 decks
7%synergy
Lightning Greaves
9.3%inclusion7 decks75 decks
-24%synergy
Wayfarer's Bauble
6.7%inclusion5 decks75 decks
-9%synergy
Ashnod's Altar
6.7%inclusion5 decks75 decks
-13%synergy
Prosthetic Injector
6.7%inclusion5 decks75 decks
6%synergy
Whispersilk Cloak
5.3%inclusion4 decks75 decks
-1%synergy
Eldrazi Monument
5.3%inclusion4 decks75 decks
4%synergy
Enchantments
Cover of Darkness
49%inclusion37 decks75 decks
46%synergy
Necrogen Communion
44%inclusion33 decks75 decks
42%synergy
Phyrexian Arena
35%inclusion26 decks75 decks
-5%synergy
Phyresis
25%inclusion19 decks75 decks
23%synergy
Bad Moon
20%inclusion15 decks75 decks
17%synergy
Haunted One
19%inclusion14 decks75 decks
16%synergy
Black Market Connections
15%inclusion11 decks75 decks
-9%synergy
Black Market
12%inclusion9 decks75 decks
-9%synergy
Grave Pact
12%inclusion9 decks75 decks
-7%synergy
Intimidation
9.3%inclusion7 decks75 decks
9%synergy
Oversold Cemetery
9.3%inclusion7 decks75 decks
4%synergy
Glistening Oil
8.0%inclusion6 decks75 decks
7%synergy
Phyrexian Reclamation
8.0%inclusion6 decks75 decks
-2%synergy
The Meathook Massacre
6.7%inclusion5 decks75 decks
-11%synergy
Vampiric Rites
6.7%inclusion5 decks75 decks
1%synergy
Tribute to Horobi
6.7%inclusion5 decks75 decks
6%synergy
Lord Skitter's Blessing
6.7%inclusion5 decks75 decks
6%synergy
Snake Cult Initiation
5.3%inclusion4 decks75 decks
5%synergy
No Mercy
5.3%inclusion4 decks75 decks
-2%synergy
Oubliette
5.3%inclusion4 decks75 decks
2%synergy
Planeswalkers
Vraska, Betrayal's Sting
39%inclusion29 decks75 decks
36%synergy
Liliana of the Dark Realms
13%inclusion10 decks75 decks
-1%synergy
Utility Lands
Swarmyard
69%inclusion52 decks75 decks
64%synergy
Karn's Bastion
65%inclusion49 decks75 decks
61%synergy
Bojuka Bog
61%inclusion46 decks75 decks
14%synergy
Cabal Coffers
59%inclusion44 decks75 decks
4%synergy
Mudflat Village
52%inclusion39 decks75 decks
49%synergy
Rogue's Passage
52%inclusion39 decks75 decks
33%synergy
Urborg, Tomb of Yawgmoth
35%inclusion26 decks75 decks
-3%synergy
Three Tree City
32%inclusion24 decks75 decks
27%synergy
Witch's Cottage
29%inclusion22 decks75 decks
5%synergy
Nykthos, Shrine to Nyx
25%inclusion19 decks75 decks
-4%synergy
Mortuary Mire
24%inclusion18 decks75 decks
11%synergy
Cabal Stronghold
23%inclusion17 decks75 decks
-12%synergy
Reliquary Tower
23%inclusion17 decks75 decks
-8%synergy
Access Tunnel
23%inclusion17 decks75 decks
20%synergy
Secret Tunnel
18%inclusion7 decks40 decks
16%synergy
Phyrexian Tower
17%inclusion13 decks75 decks
-8%synergy
Crypt of Agadeem
15%inclusion11 decks75 decks
3%synergy
War Room
15%inclusion11 decks75 decks
-1%synergy
Castle Locthwain
15%inclusion11 decks75 decks
-2%synergy
Barren Moor
13%inclusion10 decks75 decks
4%synergy
Inkmoth Nexus
11%inclusion8 decks75 decks
10%synergy
Takenuma, Abandoned Mire
11%inclusion8 decks75 decks
-5%synergy
Desert of the Glorified
9.3%inclusion7 decks75 decks
7%synergy
Mutavault
9.3%inclusion7 decks75 decks
9%synergy
Temple of the False God
9.3%inclusion7 decks75 decks
2%synergy
Shizo, Death's Storehouse
8.0%inclusion6 decks75 decks
-2%synergy
The Dross Pits
8.0%inclusion6 decks75 decks
7%synergy
Minas Morgul, Dark Fortress
6.7%inclusion5 decks75 decks
4%synergy
Polluted Mire
6.7%inclusion5 decks75 decks
3%synergy
The Black Gate
5.3%inclusion4 decks75 decks
2%synergy
Deserted Temple
5.3%inclusion4 decks75 decks
1%synergy
Peat Bog
5.3%inclusion4 decks75 decks
3%synergy
Mana Artifacts
Sol Ring
85%inclusion64 decks75 decks
-1%synergy
Arcane Signet
49%inclusion37 decks75 decks
-12%synergy
Glistening Sphere
45%inclusion34 decks75 decks
44%synergy
Staff of Compleation
25%inclusion19 decks75 decks
24%synergy
Patchwork Banner
25%inclusion19 decks75 decks
21%synergy
Heraldic Banner
17%inclusion13 decks75 decks
12%synergy
Charcoal Diamond
16%inclusion12 decks75 decks
-6%synergy
Mind Stone
13%inclusion10 decks75 decks
-16%synergy
The Soul Stone
9.4%inclusion5 decks53 decks
-5%synergy
Phyrexian Atlas
8.0%inclusion6 decks75 decks
8%synergy
Thought Vessel
6.7%inclusion5 decks75 decks
-19%synergy
Commander's Sphere
5.3%inclusion4 decks75 decks
-3%synergy
White Lotus Tile
5.0%inclusion2 decks40 decks
4%synergy
Lands
Swamp
100%inclusion75 decks75 decks
5%synergy
Path of Ancestry
41%inclusion31 decks75 decks
36%synergy
Cavern of Souls
27%inclusion20 decks75 decks
20%synergy
Fell the Profane
16%inclusion12 decks75 decks
-3%synergy
Malakir Rebirth
16%inclusion12 decks75 decks
-7%synergy
Command Tower
13%inclusion10 decks75 decks
8%synergy
Evolving Wilds
11%inclusion8 decks75 decks
7%synergy
Myriad Landscape
9.3%inclusion7 decks75 decks
-16%synergy
Hagra Mauling
6.7%inclusion5 decks75 decks
2%synergy
Escape Tunnel
6.7%inclusion5 decks75 decks
6%synergy
Ash Barrens
6.7%inclusion5 decks75 decks
5%synergy
Urza's Cave
5.3%inclusion4 decks75 decks
-3%synergy
Mirrex
5.3%inclusion4 decks75 decks
5%synergy
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