Karumonix, the Rat King (Commander) - Core Infect

Karumonix, the Rat King
Rank #385
109decks
As CommanderAs CardAverage DeckDecks
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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
Mana Artifacts
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Rat King, Pale Piper
22%inclusion6 decks27 decks
18%synergy
Rat King, Verminister
16%inclusion6 decks37 decks
13%synergy
Big Apple, 3 a.m.
7.4%inclusion2 decks27 decks
5%synergy
Splinter's Technique
5.4%inclusion2 decks37 decks
3%synergy
Tunnel Rats
3.8%inclusion1 decks26 decks
3%synergy
High Synergy Cards
Blightbelly Rat
86%inclusion94 decks109 decks
83%synergy
Piper of the Swarm
89%inclusion97 decks109 decks
82%synergy
Infectious Inquiry
80%inclusion87 decks109 decks
77%synergy
Ogre Slumlord
83%inclusion90 decks109 decks
73%synergy
Typhoid Rats
75%inclusion82 decks109 decks
71%synergy
Pack Rat
76%inclusion83 decks109 decks
70%synergy
Ichor Rats
72%inclusion79 decks109 decks
69%synergy
Vraska's Fall
72%inclusion78 decks109 decks
68%synergy
Rancid Rats
71%inclusion77 decks109 decks
68%synergy
Marrow-Gnawer
70%inclusion76 decks109 decks
66%synergy
Top Cards
Lord Skitter, Sewer King
72%inclusion79 decks109 decks
64%synergy
Lord Skitter's Butcher
67%inclusion73 decks109 decks
64%synergy
Drown in Ichor
66%inclusion72 decks109 decks
62%synergy
Septic Rats
63%inclusion69 decks109 decks
61%synergy
Whisper of the Dross
60%inclusion65 decks109 decks
57%synergy
Tangled Colony
59%inclusion64 decks109 decks
56%synergy
Crypt Rats
58%inclusion63 decks109 decks
53%synergy
Dark Ritual
56%inclusion61 decks109 decks
-11%synergy
Phyresis Outbreak
53%inclusion58 decks109 decks
51%synergy
Voracious Vermin
53%inclusion58 decks109 decks
50%synergy
Creatures
Burglar Rat
52%inclusion57 decks109 decks
41%synergy
Stronghold Rats
52%inclusion57 decks109 decks
48%synergy
Chittering Skitterling
50%inclusion55 decks109 decks
49%synergy
Gnat Miser
48%inclusion52 decks109 decks
45%synergy
Wave of Rats
47%inclusion51 decks109 decks
45%synergy
Persistent Marshstalker
45%inclusion45 decks101 decks
42%synergy
Changeling Outcast
42%inclusion46 decks109 decks
37%synergy
Ratcatcher
42%inclusion46 decks109 decks
39%synergy
Rat Colony
41%inclusion45 decks109 decks
36%synergy
Nezumi Informant
38%inclusion41 decks109 decks
31%synergy
Nezumi Cutthroat
37%inclusion40 decks109 decks
36%synergy
Ruin Rat
36%inclusion39 decks109 decks
34%synergy
Chittering Witch
35%inclusion38 decks109 decks
30%synergy
Ink-Eyes, Servant of Oni
34%inclusion37 decks109 decks
31%synergy
Twisted Sewer-Witch
34%inclusion37 decks109 decks
32%synergy
Ashcoat of the Shadow Swarm
33%inclusion36 decks109 decks
30%synergy
Pestilence Rats
33%inclusion36 decks109 decks
31%synergy
Nashi, Moon Sage's Scion
33%inclusion36 decks109 decks
29%synergy
Old Flitterfang
33%inclusion36 decks109 decks
32%synergy
Gnawing Vermin
32%inclusion35 decks109 decks
31%synergy
Engine Rat
31%inclusion27 decks86 decks
30%synergy
Nezumi Prowler
31%inclusion34 decks109 decks
30%synergy
Ravenous Rats
30%inclusion33 decks109 decks
28%synergy
Drainpipe Vermin
30%inclusion33 decks109 decks
29%synergy
Swarm of Rats
29%inclusion32 decks109 decks
27%synergy
Mukotai Ambusher
23%inclusion25 decks109 decks
22%synergy
Rotting Rats
22%inclusion24 decks109 decks
19%synergy
Ruthless Radrat
22%inclusion24 decks109 decks
21%synergy
Species Specialist
22%inclusion24 decks109 decks
19%synergy
Razortooth Rats
22%inclusion24 decks109 decks
21%synergy
Locust Miser
22%inclusion24 decks109 decks
20%synergy
Skullsnatcher
21%inclusion23 decks109 decks
20%synergy
Throat Slitter
21%inclusion23 decks109 decks
19%synergy
Ayara, First of Locthwain
20%inclusion22 decks109 decks
-5%synergy
Undercity Dire Rat
20%inclusion14 decks70 decks
18%synergy
Valley Rotcaller
20%inclusion20 decks101 decks
17%synergy
Nezumi Graverobber
18%inclusion20 decks109 decks
17%synergy
Crypt Ghast
17%inclusion19 decks109 decks
-30%synergy
Okiba-Gang Shinobi
17%inclusion19 decks109 decks
17%synergy
Sinuous Vermin
16%inclusion17 decks109 decks
15%synergy
Innocuous Rat
15%inclusion14 decks95 decks
14%synergy
Relentless Rats
15%inclusion16 decks109 decks
13%synergy
Bog Rats
14%inclusion15 decks109 decks
13%synergy
Refurbished Familiar
13%inclusion14 decks104 decks
11%synergy
Chittering Rats
13%inclusion14 decks109 decks
12%synergy
Gray Merchant of Asphodel
13%inclusion14 decks109 decks
-38%synergy
Nezumi Bladeblesser
12%inclusion13 decks109 decks
11%synergy
Nezumi Linkbreaker
11%inclusion12 decks109 decks
10%synergy
Daggerfang Duo
11%inclusion11 decks101 decks
10%synergy
Yawgmoth, Thran Physician
10%inclusion11 decks109 decks
0%synergy
Instants
Village Rites
46%inclusion50 decks109 decks
21%synergy
Defile
41%inclusion45 decks109 decks
5%synergy
Grim Affliction
35%inclusion38 decks109 decks
33%synergy
Rat Out
30%inclusion33 decks109 decks
29%synergy
Anoint with Affliction
28%inclusion31 decks109 decks
28%synergy
Corrupted Conviction
28%inclusion30 decks109 decks
15%synergy
Go for the Throat
23%inclusion25 decks109 decks
0%synergy
Deadly Dispute
21%inclusion23 decks109 decks
-5%synergy
Tainted Strike
21%inclusion23 decks109 decks
18%synergy
Virulent Wound
19%inclusion21 decks109 decks
19%synergy
Tragic Slip
17%inclusion18 decks109 decks
-3%synergy
Consuming Corruption
16%inclusion17 decks104 decks
1%synergy
Withering Torment
15%inclusion14 decks95 decks
-17%synergy
Raise the Draugr
15%inclusion16 decks109 decks
14%synergy
Murder
15%inclusion16 decks109 decks
5%synergy
Infernal Grasp
14%inclusion15 decks109 decks
-11%synergy
Deadly Rollick
12%inclusion13 decks109 decks
-12%synergy
Gravepurge
12%inclusion13 decks109 decks
10%synergy
Fell the Profane
12%inclusion12 decks104 decks
-7%synergy
Foul-Tongue Shriek
10%inclusion11 decks109 decks
8%synergy
Hero's Downfall
9.2%inclusion10 decks109 decks
2%synergy
Not Dead After All
9.2%inclusion10 decks109 decks
-2%synergy
Bitter Triumph
9.2%inclusion10 decks109 decks
0%synergy
Undying Malice
8.3%inclusion9 decks109 decks
-2%synergy
Malakir Rebirth
8.3%inclusion9 decks109 decks
-15%synergy
Baleful Mastery
8.3%inclusion9 decks109 decks
0%synergy
Sudden Spoiling
8.3%inclusion9 decks109 decks
-1%synergy
Feign Death
8.3%inclusion9 decks109 decks
0%synergy
Offer Immortality
7.3%inclusion8 decks109 decks
5%synergy
Sheoldred's Edict
6.4%inclusion7 decks109 decks
-8%synergy
Altar's Reap
6.4%inclusion7 decks109 decks
4%synergy
Cabal Ritual
5.5%inclusion6 decks109 decks
-13%synergy
Darkness
5.5%inclusion6 decks109 decks
-4%synergy
Dismember
5.5%inclusion6 decks109 decks
-5%synergy
Unbury
5.1%inclusion2 decks39 decks
4%synergy
Sorceries
Crippling Fear
46%inclusion50 decks109 decks
43%synergy
Feed the Swarm
44%inclusion48 decks109 decks
-6%synergy
Vat Emergence
39%inclusion42 decks109 decks
37%synergy
Sign in Blood
37%inclusion40 decks109 decks
1%synergy
Revenge of the Rats
36%inclusion33 decks92 decks
33%synergy
Read the Bones
29%inclusion32 decks109 decks
12%synergy
Unearth
26%inclusion28 decks109 decks
17%synergy
Night's Whisper
26%inclusion28 decks109 decks
1%synergy
Patriarch's Bidding
25%inclusion27 decks109 decks
21%synergy
Kindred Dominance
23%inclusion25 decks109 decks
18%synergy
Spread the Sickness
21%inclusion23 decks109 decks
20%synergy
Swarmyard Massacre
19%inclusion19 decks101 decks
16%synergy
Feed the Infection
18%inclusion20 decks109 decks
18%synergy
Diabolic Tutor
14%inclusion15 decks109 decks
-1%synergy
Plague of Vermin
14%inclusion15 decks109 decks
11%synergy
Victimize
13%inclusion14 decks109 decks
-14%synergy
Bloodline Bidding
13%inclusion5 decks39 decks
8%synergy
Geth's Summons
12%inclusion13 decks109 decks
11%synergy
Mutilate
11%inclusion12 decks109 decks
-6%synergy
Caress of Phyrexia
11%inclusion12 decks109 decks
10%synergy
Toxic Deluge
10%inclusion11 decks109 decks
-27%synergy
Reanimate
9.2%inclusion10 decks109 decks
-31%synergy
Syphon Mind
9.2%inclusion10 decks109 decks
-3%synergy
Return from Extinction
8.3%inclusion9 decks109 decks
8%synergy
Echoing Return
8.3%inclusion9 decks109 decks
5%synergy
Exsanguinate
8.3%inclusion9 decks109 decks
-16%synergy
Lab Rats
8.3%inclusion9 decks109 decks
8%synergy
Pact of the Serpent
8.3%inclusion9 decks109 decks
7%synergy
Forever Young
7.3%inclusion8 decks109 decks
6%synergy
Haunting Voyage
7.3%inclusion8 decks109 decks
6%synergy
Bubbling Muck
7.3%inclusion8 decks109 decks
-8%synergy
Corrupt
5.5%inclusion6 decks109 decks
3%synergy
Insatiable Avarice
5.5%inclusion6 decks109 decks
-6%synergy
Utility Artifacts
Jet Medallion
50%inclusion55 decks109 decks
-11%synergy
Bontu's Monument
50%inclusion54 decks109 decks
21%synergy
Herald's Horn
44%inclusion48 decks109 decks
38%synergy
Contagion Clasp
35%inclusion38 decks109 decks
33%synergy
Vanquisher's Banner
29%inclusion32 decks109 decks
25%synergy
Skullclamp
27%inclusion29 decks109 decks
5%synergy
Contagion Engine
22%inclusion24 decks109 decks
20%synergy
Prosthetic Injector
17%inclusion18 decks109 decks
16%synergy
Swiftfoot Boots
16%inclusion17 decks109 decks
-16%synergy
Whip of Erebos
15%inclusion16 decks109 decks
4%synergy
Door of Destinies
15%inclusion16 decks109 decks
12%synergy
Thrumming Stone
15%inclusion16 decks109 decks
11%synergy
Lightning Greaves
15%inclusion16 decks109 decks
-19%synergy
Chronicle of Victory
13%inclusion5 decks40 decks
9%synergy
Whispersilk Cloak
12%inclusion13 decks109 decks
6%synergy
Vat of Rebirth
10%inclusion11 decks109 decks
6%synergy
Icon of Ancestry
10%inclusion11 decks109 decks
9%synergy
Coat of Arms
10%inclusion11 decks109 decks
7%synergy
Grafted Exoskeleton
10%inclusion11 decks109 decks
9%synergy
Wayfarer's Bauble
7.3%inclusion8 decks109 decks
-8%synergy
Ashnod's Altar
5.5%inclusion6 decks109 decks
-14%synergy
Enchantments
Necrogen Communion
50%inclusion54 decks109 decks
48%synergy
Phyrexian Arena
37%inclusion40 decks109 decks
-3%synergy
Cover of Darkness
29%inclusion32 decks109 decks
26%synergy
Phyresis
27%inclusion29 decks109 decks
25%synergy
Oversold Cemetery
24%inclusion26 decks109 decks
19%synergy
Bad Moon
20%inclusion22 decks109 decks
17%synergy
Haunted One
18%inclusion20 decks109 decks
16%synergy
Tribute to Horobi
16%inclusion17 decks109 decks
15%synergy
Lord Skitter's Blessing
12%inclusion13 decks109 decks
11%synergy
Vampiric Rites
11%inclusion12 decks109 decks
5%synergy
Grave Pact
11%inclusion12 decks109 decks
-8%synergy
Black Market
10%inclusion11 decks109 decks
-11%synergy
Phyrexian Reclamation
10%inclusion11 decks109 decks
0%synergy
Black Market Connections
10%inclusion11 decks109 decks
-14%synergy
Dictate of Erebos
8.3%inclusion9 decks109 decks
-3%synergy
Intimidation
6.4%inclusion7 decks109 decks
6%synergy
Glistening Oil
5.5%inclusion6 decks109 decks
5%synergy
Relic Putrescence
5.5%inclusion6 decks109 decks
5%synergy
Planeswalkers
Vraska, Betrayal's Sting
29%inclusion32 decks109 decks
27%synergy
Liliana of the Dark Realms
11%inclusion12 decks109 decks
-3%synergy
Utility Lands
Swarmyard
61%inclusion66 decks109 decks
55%synergy
Karn's Bastion
57%inclusion62 decks109 decks
53%synergy
Rogue's Passage
48%inclusion52 decks109 decks
29%synergy
Bojuka Bog
46%inclusion50 decks109 decks
-1%synergy
Mudflat Village
39%inclusion40 decks102 decks
37%synergy
Witch's Cottage
31%inclusion34 decks109 decks
7%synergy
Cabal Coffers
30%inclusion33 decks109 decks
-25%synergy
Cabal Stronghold
28%inclusion31 decks109 decks
-6%synergy
Mortuary Mire
28%inclusion30 decks109 decks
14%synergy
Access Tunnel
25%inclusion27 decks109 decks
22%synergy
Three Tree City
23%inclusion23 decks101 decks
18%synergy
Nykthos, Shrine to Nyx
20%inclusion22 decks109 decks
-10%synergy
Urborg, Tomb of Yawgmoth
18%inclusion20 decks109 decks
-19%synergy
Reliquary Tower
17%inclusion19 decks109 decks
-13%synergy
Barren Moor
17%inclusion18 decks109 decks
7%synergy
Secret Tunnel
16%inclusion8 decks49 decks
15%synergy
Castle Locthwain
16%inclusion17 decks109 decks
-1%synergy
Phyrexian Tower
14%inclusion15 decks109 decks
-11%synergy
Crypt of Agadeem
12%inclusion13 decks109 decks
1%synergy
Shizo, Death's Storehouse
11%inclusion12 decks109 decks
1%synergy
War Room
10%inclusion11 decks109 decks
-6%synergy
Minas Morgul, Dark Fortress
9.2%inclusion10 decks109 decks
6%synergy
Inkmoth Nexus
8.3%inclusion9 decks109 decks
7%synergy
The Dross Pits
8.3%inclusion9 decks109 decks
7%synergy
Takenuma, Abandoned Mire
7.3%inclusion8 decks109 decks
-8%synergy
Temple of the False God
7.3%inclusion8 decks109 decks
0%synergy
Vesuva
5.5%inclusion6 decks109 decks
3%synergy
Mutavault
5.5%inclusion6 decks109 decks
5%synergy
Polluted Mire
5.5%inclusion6 decks109 decks
2%synergy
Mana Artifacts
Sol Ring
70%inclusion76 decks109 decks
-16%synergy
Glistening Sphere
50%inclusion54 decks109 decks
48%synergy
Arcane Signet
49%inclusion53 decks109 decks
-13%synergy
Staff of Compleation
24%inclusion26 decks109 decks
22%synergy
Patchwork Banner
23%inclusion23 decks101 decks
18%synergy
Charcoal Diamond
20%inclusion22 decks109 decks
-2%synergy
Mind Stone
20%inclusion22 decks109 decks
-9%synergy
Heraldic Banner
14%inclusion15 decks109 decks
8%synergy
Caged Sun
13%inclusion14 decks109 decks
1%synergy
Phyrexian Atlas
12%inclusion13 decks109 decks
12%synergy
Commander's Sphere
8.3%inclusion9 decks109 decks
0%synergy
Gauntlet of Power
6.4%inclusion7 decks109 decks
3%synergy
Thought Vessel
5.5%inclusion6 decks109 decks
-20%synergy
The Soul Stone
5.0%inclusion3 decks60 decks
-9%synergy
Lands
Swamp
98%inclusion107 decks109 decks
3%synergy
Path of Ancestry
46%inclusion50 decks109 decks
41%synergy
Myriad Landscape
26%inclusion28 decks109 decks
0%synergy
Cavern of Souls
12%inclusion13 decks109 decks
5%synergy
Fell the Profane
12%inclusion12 decks104 decks
-7%synergy
Escape Tunnel
10%inclusion11 decks109 decks
9%synergy
Command Tower
8.3%inclusion9 decks109 decks
3%synergy
Malakir Rebirth
8.3%inclusion9 decks109 decks
-15%synergy
Terramorphic Expanse
6.4%inclusion7 decks109 decks
4%synergy
Urza's Cave
5.7%inclusion6 decks106 decks
-3%synergy
Evolving Wilds
5.5%inclusion6 decks109 decks
2%synergy
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