Karumonix, the Rat King (Commander) - Expensive Infect

Karumonix, the Rat King
Rank #385
53decks
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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Enchantments
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Utility Lands
Mana Artifacts
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Rat King, Pale Piper
33%inclusion4 decks12 decks
29%synergy
Rat King, Verminister
31%inclusion4 decks13 decks
28%synergy
Shredder's Technique
8.3%inclusion1 decks12 decks
5%synergy
High Synergy Cards
Marrow-Gnawer
100%inclusion53 decks53 decks
97%synergy
Swarmyard
91%inclusion48 decks53 decks
85%synergy
Ashcoat of the Shadow Swarm
87%inclusion46 decks53 decks
83%synergy
Blightbelly Rat
87%inclusion46 decks53 decks
83%synergy
Piper of the Swarm
89%inclusion47 decks53 decks
82%synergy
Ichor Rats
81%inclusion43 decks53 decks
78%synergy
Ogre Slumlord
85%inclusion45 decks53 decks
75%synergy
Pack Rat
79%inclusion42 decks53 decks
73%synergy
Infectious Inquiry
74%inclusion39 decks53 decks
71%synergy
Vraska's Fall
70%inclusion37 decks53 decks
66%synergy
Top Cards
Jet Medallion
81%inclusion43 decks53 decks
19%synergy
Lord Skitter, Sewer King
74%inclusion39 decks53 decks
65%synergy
Dark Ritual
70%inclusion37 decks53 decks
3%synergy
Phyresis Outbreak
68%inclusion36 decks53 decks
66%synergy
Cover of Darkness
66%inclusion35 decks53 decks
63%synergy
Bontu's Monument
62%inclusion33 decks53 decks
34%synergy
Septic Rats
60%inclusion32 decks53 decks
58%synergy
Drown in Ichor
60%inclusion32 decks53 decks
56%synergy
Herald's Horn
58%inclusion31 decks53 decks
53%synergy
Vraska, Betrayal's Sting
57%inclusion30 decks53 decks
54%synergy
Game Changers
Demonic Tutor
75%inclusion40 decks53 decks
48%synergy
Vampiric Tutor
60%inclusion32 decks53 decks
39%synergy
Bolas's Citadel
30%inclusion16 decks53 decks
2%synergy
Imperial Seal
17%inclusion9 decks53 decks
10%synergy
Ancient Tomb
17%inclusion9 decks53 decks
5%synergy
Necropotence
11%inclusion6 decks53 decks
-3%synergy
The One Ring
9.4%inclusion5 decks53 decks
0%synergy
Chrome Mox
7.5%inclusion4 decks53 decks
2%synergy
Creatures
Rancid Rats
51%inclusion27 decks53 decks
48%synergy
Lord Skitter's Butcher
49%inclusion26 decks53 decks
46%synergy
Ratcatcher
49%inclusion26 decks53 decks
46%synergy
Tangled Colony
47%inclusion25 decks53 decks
44%synergy
Rat Colony
47%inclusion25 decks53 decks
42%synergy
Crypt Rats
43%inclusion23 decks53 decks
39%synergy
Crypt Ghast
40%inclusion21 decks53 decks
-8%synergy
Stronghold Rats
40%inclusion21 decks53 decks
36%synergy
Wave of Rats
38%inclusion20 decks53 decks
36%synergy
Nashi, Moon Sage's Scion
38%inclusion20 decks53 decks
34%synergy
Changeling Outcast
36%inclusion19 decks53 decks
31%synergy
Typhoid Rats
36%inclusion19 decks53 decks
32%synergy
Persistent Marshstalker
35%inclusion16 decks46 decks
32%synergy
Ink-Eyes, Servant of Oni
34%inclusion18 decks53 decks
31%synergy
Ayara, First of Locthwain
32%inclusion17 decks53 decks
6%synergy
Species Specialist
30%inclusion16 decks53 decks
27%synergy
Burglar Rat
28%inclusion15 decks53 decks
17%synergy
Yawgmoth, Thran Physician
28%inclusion15 decks53 decks
18%synergy
Gnat Miser
28%inclusion15 decks53 decks
25%synergy
Throat Slitter
25%inclusion13 decks53 decks
23%synergy
Nezumi Informant
25%inclusion13 decks53 decks
18%synergy
Roaming Throne
21%inclusion11 decks53 decks
18%synergy
Chittering Witch
21%inclusion11 decks53 decks
16%synergy
Filth
19%inclusion10 decks53 decks
16%synergy
Locust Miser
19%inclusion10 decks53 decks
17%synergy
Voracious Vermin
19%inclusion10 decks53 decks
16%synergy
Pestilence Rats
17%inclusion9 decks53 decks
15%synergy
Valley Rotcaller
15%inclusion7 decks46 decks
13%synergy
Nezumi Graverobber
15%inclusion8 decks53 decks
14%synergy
Ruthless Radrat
15%inclusion8 decks53 decks
14%synergy
Gray Merchant of Asphodel
15%inclusion8 decks53 decks
-36%synergy
Swarm of Rats
15%inclusion8 decks53 decks
13%synergy
Nezumi Prowler
15%inclusion8 decks53 decks
14%synergy
Skithiryx, the Blight Dragon
15%inclusion8 decks53 decks
14%synergy
Old Flitterfang
15%inclusion8 decks53 decks
14%synergy
Engine Rat
14%inclusion5 decks35 decks
13%synergy
Chittering Skitterling
13%inclusion7 decks53 decks
12%synergy
Zodiac Rat
11%inclusion6 decks53 decks
11%synergy
Nezumi Cutthroat
11%inclusion6 decks53 decks
11%synergy
Undercity Dire Rat
11%inclusion3 decks28 decks
9%synergy
Refurbished Familiar
11%inclusion5 decks47 decks
8%synergy
Relentless Rats
9.4%inclusion5 decks53 decks
8%synergy
Rotting Rats
9.4%inclusion5 decks53 decks
6%synergy
Zulaport Cutthroat
9.4%inclusion5 decks53 decks
-14%synergy
Twisted Sewer-Witch
9.4%inclusion5 decks53 decks
8%synergy
Plague Myr
7.5%inclusion4 decks53 decks
6%synergy
Morbid Opportunist
7.5%inclusion4 decks53 decks
-16%synergy
Crashing Drawbridge
7.5%inclusion4 decks53 decks
5%synergy
Razortooth Rats
7.5%inclusion4 decks53 decks
7%synergy
Midnight Reaper
7.5%inclusion4 decks53 decks
-1%synergy
Instants
Deadly Rollick
51%inclusion27 decks53 decks
27%synergy
Whisper of the Dross
43%inclusion23 decks53 decks
41%synergy
Tainted Strike
43%inclusion23 decks53 decks
40%synergy
Go for the Throat
34%inclusion18 decks53 decks
11%synergy
Malakir Rebirth
30%inclusion16 decks53 decks
7%synergy
Fell the Profane
29%inclusion14 decks48 decks
10%synergy
Village Rites
25%inclusion13 decks53 decks
-1%synergy
Grim Affliction
25%inclusion13 decks53 decks
23%synergy
Defile
15%inclusion8 decks53 decks
-21%synergy
Cabal Ritual
15%inclusion8 decks53 decks
-3%synergy
Tragic Slip
15%inclusion8 decks53 decks
-5%synergy
Snuff Out
13%inclusion7 decks53 decks
0%synergy
Anoint with Affliction
13%inclusion7 decks53 decks
13%synergy
Sudden Spoiling
13%inclusion7 decks53 decks
4%synergy
Bitter Triumph
11%inclusion6 decks53 decks
2%synergy
Infernal Grasp
11%inclusion6 decks53 decks
-14%synergy
Hero's Downfall
9.4%inclusion5 decks53 decks
3%synergy
Withering Boon
9.4%inclusion5 decks53 decks
5%synergy
Corrupted Conviction
9.4%inclusion5 decks53 decks
-3%synergy
Dismember
9.4%inclusion5 decks53 decks
-1%synergy
Withering Torment
9.3%inclusion4 decks43 decks
-22%synergy
Sheoldred's Edict
7.5%inclusion4 decks53 decks
-7%synergy
Imp's Mischief
7.5%inclusion4 decks53 decks
-17%synergy
Doom Blade
7.5%inclusion4 decks53 decks
0%synergy
Virulent Wound
7.5%inclusion4 decks53 decks
7%synergy
Murder
7.5%inclusion4 decks53 decks
-3%synergy
Breathe Your Last
6.4%inclusion3 decks47 decks
4%synergy
Hagra Mauling
5.7%inclusion3 decks53 decks
1%synergy
Force of Despair
5.7%inclusion3 decks53 decks
-2%synergy
Not Dead After All
5.7%inclusion3 decks53 decks
-6%synergy
Deadly Dispute
5.7%inclusion3 decks53 decks
-20%synergy
Culling the Weak
5.7%inclusion3 decks53 decks
-10%synergy
Plumb the Forbidden
5.7%inclusion3 decks53 decks
1%synergy
Offer Immortality
5.7%inclusion3 decks53 decks
4%synergy
Curtains' Call
5.7%inclusion3 decks53 decks
4%synergy
Sorceries
Feed the Swarm
47%inclusion25 decks53 decks
-3%synergy
Kindred Dominance
43%inclusion23 decks53 decks
39%synergy
Swarmyard Massacre
38%inclusion17 decks45 decks
35%synergy
Bloodline Bidding
36%inclusion5 decks14 decks
31%synergy
Patriarch's Bidding
34%inclusion18 decks53 decks
30%synergy
Damnation
28%inclusion15 decks53 decks
8%synergy
Toxic Deluge
25%inclusion13 decks53 decks
-12%synergy
Diabolic Intent
23%inclusion12 decks53 decks
8%synergy
Reanimate
23%inclusion12 decks53 decks
-17%synergy
Plague of Vermin
23%inclusion12 decks53 decks
20%synergy
Night's Whisper
21%inclusion11 decks53 decks
-4%synergy
Revenge of the Rats
20%inclusion8 decks41 decks
16%synergy
Vat Emergence
19%inclusion10 decks53 decks
17%synergy
Sign in Blood
19%inclusion10 decks53 decks
-17%synergy
Agadeem's Awakening
15%inclusion8 decks53 decks
8%synergy
Grim Tutor
15%inclusion8 decks53 decks
3%synergy
Pact of the Serpent
15%inclusion8 decks53 decks
13%synergy
Torment of Hailfire
13%inclusion7 decks53 decks
-2%synergy
Crippling Fear
13%inclusion7 decks53 decks
10%synergy
Geth's Summons
11%inclusion6 decks53 decks
11%synergy
Diabolic Tutor
9.4%inclusion5 decks53 decks
-5%synergy
Haunting Voyage
9.4%inclusion5 decks53 decks
8%synergy
Bubbling Muck
9.4%inclusion5 decks53 decks
-6%synergy
Read the Bones
9.4%inclusion5 decks53 decks
-8%synergy
Unearth
7.5%inclusion4 decks53 decks
-1%synergy
Echoing Return
7.5%inclusion4 decks53 decks
4%synergy
Caress of Phyrexia
7.5%inclusion4 decks53 decks
7%synergy
Insatiable Avarice
7.5%inclusion4 decks53 decks
-4%synergy
Gruesome Fate
7.5%inclusion4 decks53 decks
5%synergy
Black Sun's Zenith
5.7%inclusion3 decks53 decks
0%synergy
Spread the Sickness
5.7%inclusion3 decks53 decks
5%synergy
Yawgmoth's Will
5.7%inclusion3 decks53 decks
2%synergy
Exsanguinate
5.7%inclusion3 decks53 decks
-19%synergy
Syphon Mind
5.7%inclusion3 decks53 decks
-7%synergy
Beseech the Mirror
5.7%inclusion3 decks53 decks
-1%synergy
Utility Artifacts
Skullclamp
57%inclusion30 decks53 decks
35%synergy
Contagion Engine
38%inclusion20 decks53 decks
36%synergy
Sword of Truth and Justice
30%inclusion16 decks53 decks
29%synergy
Thrumming Stone
30%inclusion16 decks53 decks
26%synergy
Lightning Greaves
28%inclusion15 decks53 decks
-5%synergy
Vanquisher's Banner
25%inclusion13 decks53 decks
21%synergy
Grafted Exoskeleton
23%inclusion12 decks53 decks
22%synergy
Chronicle of Victory
21%inclusion3 decks14 decks
18%synergy
Contagion Clasp
19%inclusion10 decks53 decks
17%synergy
Whip of Erebos
19%inclusion10 decks53 decks
8%synergy
Thornbite Staff
17%inclusion9 decks53 decks
14%synergy
Coat of Arms
15%inclusion8 decks53 decks
12%synergy
Expedition Map
15%inclusion8 decks53 decks
3%synergy
Door of Destinies
15%inclusion8 decks53 decks
13%synergy
Eldrazi Monument
15%inclusion8 decks53 decks
13%synergy
Gathering Stone
14%inclusion2 decks14 decks
13%synergy
Prosthetic Injector
11%inclusion6 decks53 decks
11%synergy
Akroma's Memorial
11%inclusion6 decks53 decks
10%synergy
Swiftfoot Boots
11%inclusion6 decks53 decks
-20%synergy
The Darkness Crystal
11%inclusion3 decks28 decks
-9%synergy
Sensei's Divining Top
9.4%inclusion5 decks53 decks
1%synergy
Ashnod's Altar
7.5%inclusion4 decks53 decks
-12%synergy
Wayfarer's Bauble
5.7%inclusion3 decks53 decks
-10%synergy
Aetherflux Reservoir
5.7%inclusion3 decks53 decks
-4%synergy
Recon Craft Theta
5.7%inclusion3 decks53 decks
6%synergy
Urza's Incubator
5.7%inclusion3 decks53 decks
4%synergy
Enchantments
Phyrexian Arena
43%inclusion23 decks53 decks
4%synergy
Grave Pact
42%inclusion22 decks53 decks
22%synergy
Black Market Connections
38%inclusion20 decks53 decks
14%synergy
Necrogen Communion
26%inclusion14 decks53 decks
25%synergy
Haunted One
23%inclusion12 decks53 decks
20%synergy
Black Market
21%inclusion11 decks53 decks
0%synergy
Oversold Cemetery
21%inclusion11 decks53 decks
15%synergy
Phyresis
19%inclusion10 decks53 decks
17%synergy
The Meathook Massacre
17%inclusion9 decks53 decks
0%synergy
Dictate of Erebos
17%inclusion9 decks53 decks
6%synergy
Glistening Oil
15%inclusion8 decks53 decks
14%synergy
Dark Prophecy
13%inclusion7 decks53 decks
9%synergy
Phyrexian Reclamation
11%inclusion6 decks53 decks
1%synergy
No Mercy
9.4%inclusion5 decks53 decks
2%synergy
Relic Putrescence
7.5%inclusion4 decks53 decks
7%synergy
Bad Moon
7.5%inclusion4 decks53 decks
4%synergy
Vampiric Rites
5.7%inclusion3 decks53 decks
0%synergy
Exquisite Blood
5.7%inclusion3 decks53 decks
-8%synergy
Intimidation
5.7%inclusion3 decks53 decks
5%synergy
Snake Cult Initiation
5.7%inclusion3 decks53 decks
5%synergy
Bastion of Remembrance
5.7%inclusion3 decks53 decks
-11%synergy
Lord Skitter's Blessing
5.7%inclusion3 decks53 decks
5%synergy
Planeswalkers
Liliana of the Dark Realms
19%inclusion10 decks53 decks
5%synergy
Utility Lands
Cabal Coffers
91%inclusion48 decks53 decks
36%synergy
Urborg, Tomb of Yawgmoth
81%inclusion43 decks53 decks
44%synergy
Nykthos, Shrine to Nyx
79%inclusion42 decks53 decks
49%synergy
Karn's Bastion
68%inclusion36 decks53 decks
64%synergy
Bojuka Bog
57%inclusion30 decks53 decks
10%synergy
Cabal Stronghold
57%inclusion30 decks53 decks
22%synergy
Phyrexian Tower
55%inclusion29 decks53 decks
30%synergy
Three Tree City
43%inclusion20 decks46 decks
39%synergy
Mudflat Village
38%inclusion18 decks47 decks
36%synergy
Shizo, Death's Storehouse
34%inclusion18 decks53 decks
24%synergy
Rogue's Passage
34%inclusion18 decks53 decks
15%synergy
Inkmoth Nexus
32%inclusion17 decks53 decks
31%synergy
Takenuma, Abandoned Mire
30%inclusion16 decks53 decks
15%synergy
Reliquary Tower
28%inclusion15 decks53 decks
-2%synergy
Crypt of Agadeem
26%inclusion14 decks53 decks
15%synergy
Witch's Cottage
25%inclusion13 decks53 decks
0%synergy
Castle Locthwain
25%inclusion13 decks53 decks
8%synergy
Secret Tunnel
22%inclusion4 decks18 decks
21%synergy
Mortuary Mire
19%inclusion10 decks53 decks
6%synergy
War Room
17%inclusion9 decks53 decks
1%synergy
Volrath's Stronghold
15%inclusion8 decks53 decks
11%synergy
Lake of the Dead
15%inclusion8 decks53 decks
10%synergy
Urza's Saga
13%inclusion7 decks53 decks
5%synergy
Mutavault
13%inclusion7 decks53 decks
12%synergy
Minas Morgul, Dark Fortress
13%inclusion7 decks53 decks
10%synergy
Strip Mine
11%inclusion6 decks53 decks
8%synergy
Access Tunnel
11%inclusion6 decks53 decks
8%synergy
Wasteland
7.5%inclusion4 decks53 decks
6%synergy
The Black Gate
7.5%inclusion4 decks53 decks
4%synergy
Deserted Temple
7.5%inclusion4 decks53 decks
3%synergy
Midgar, City of Mako
7.1%inclusion2 decks28 decks
-4%synergy
Westvale Abbey
5.7%inclusion3 decks53 decks
-1%synergy
Vault of Whispers
5.7%inclusion3 decks53 decks
0%synergy
Vesuva
5.7%inclusion3 decks53 decks
3%synergy
Temple of the False God
5.7%inclusion3 decks53 decks
-2%synergy
Mana Artifacts
Sol Ring
85%inclusion45 decks53 decks
-1%synergy
Glistening Sphere
58%inclusion31 decks53 decks
57%synergy
Arcane Signet
38%inclusion20 decks53 decks
-24%synergy
Staff of Compleation
34%inclusion18 decks53 decks
32%synergy
The Soul Stone
30%inclusion7 decks23 decks
16%synergy
Throne of Eldraine
23%inclusion12 decks53 decks
13%synergy
Patchwork Banner
17%inclusion8 decks46 decks
13%synergy
Firdoch Core
14%inclusion2 decks14 decks
14%synergy
Gauntlet of Power
9.4%inclusion5 decks53 decks
6%synergy
Thought Vessel
9.4%inclusion5 decks53 decks
-16%synergy
Nyx Lotus
9.4%inclusion5 decks53 decks
3%synergy
Extraplanar Lens
9.4%inclusion5 decks53 decks
4%synergy
Caged Sun
7.5%inclusion4 decks53 decks
-4%synergy
Heraldic Banner
7.5%inclusion4 decks53 decks
2%synergy
Mind Stone
7.5%inclusion4 decks53 decks
-22%synergy
Jeweled Lotus
5.7%inclusion3 decks53 decks
4%synergy
Mana Crypt
5.7%inclusion3 decks53 decks
4%synergy
Mox Opal
5.7%inclusion3 decks53 decks
2%synergy
White Lotus Tile
5.6%inclusion1 decks18 decks
5%synergy
Lands
Swamp
87%inclusion46 decks53 decks
-8%synergy
Cavern of Souls
58%inclusion31 decks53 decks
52%synergy
Path of Ancestry
34%inclusion18 decks53 decks
29%synergy
Malakir Rebirth
30%inclusion16 decks53 decks
7%synergy
Fell the Profane
29%inclusion14 decks48 decks
10%synergy
Myriad Landscape
15%inclusion8 decks53 decks
-11%synergy
Agadeem's Awakening
15%inclusion8 decks53 decks
8%synergy
Snow-Covered Swamp
15%inclusion8 decks53 decks
9%synergy
Command Tower
9.4%inclusion5 decks53 decks
4%synergy
Mirrex
7.5%inclusion4 decks53 decks
7%synergy
Boggart Trawler
6.3%inclusion3 decks48 decks
-3%synergy
Urza's Cave
6.1%inclusion3 decks49 decks
-2%synergy
Hagra Mauling
5.7%inclusion3 decks53 decks
1%synergy
Prismatic Vista
5.7%inclusion3 decks53 decks
3%synergy
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