Karumonix, the Rat King (Commander) - Infect

Karumonix, the Rat King
Rank #384
528decks
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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Creatures
Instants
Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Rat King, Pale Piper
26%inclusion26 decks100 decks
22%synergy
Rat King, Verminister
23%inclusion29 decks127 decks
20%synergy
Big Apple, 3 a.m.
10%inclusion10 decks100 decks
8%synergy
Shredder's Technique
5.0%inclusion5 decks101 decks
1%synergy
Splinter's Technique
3.9%inclusion5 decks127 decks
2%synergy
High Synergy Cards
Blightbelly Rat
91%inclusion483 decks528 decks
88%synergy
Piper of the Swarm
89%inclusion471 decks528 decks
82%synergy
Ichor Rats
83%inclusion440 decks528 decks
80%synergy
Infectious Inquiry
81%inclusion430 decks528 decks
79%synergy
Pack Rat
80%inclusion423 decks528 decks
74%synergy
Ogre Slumlord
83%inclusion439 decks528 decks
73%synergy
Marrow-Gnawer
75%inclusion395 decks528 decks
71%synergy
Vraska's Fall
75%inclusion394 decks528 decks
71%synergy
Drown in Ichor
75%inclusion394 decks528 decks
71%synergy
Septic Rats
72%inclusion382 decks528 decks
70%synergy
Top Cards
Lord Skitter, Sewer King
77%inclusion406 decks528 decks
69%synergy
Rancid Rats
71%inclusion375 decks528 decks
68%synergy
Typhoid Rats
69%inclusion363 decks528 decks
65%synergy
Lord Skitter's Butcher
67%inclusion353 decks528 decks
64%synergy
Tangled Colony
63%inclusion332 decks528 decks
60%synergy
Dark Ritual
62%inclusion329 decks528 decks
-4%synergy
Whisper of the Dross
61%inclusion323 decks528 decks
58%synergy
Crypt Rats
61%inclusion320 decks528 decks
56%synergy
Phyresis Outbreak
59%inclusion314 decks528 decks
58%synergy
Stronghold Rats
55%inclusion290 decks528 decks
51%synergy
Game Changers
Demonic Tutor
18%inclusion94 decks528 decks
-10%synergy
Bolas's Citadel
13%inclusion66 decks528 decks
-16%synergy
Vampiric Tutor
12%inclusion65 decks528 decks
-9%synergy
Creatures
Burglar Rat
54%inclusion287 decks528 decks
43%synergy
Voracious Vermin
54%inclusion284 decks528 decks
51%synergy
Gnat Miser
48%inclusion256 decks528 decks
46%synergy
Persistent Marshstalker
48%inclusion221 decks461 decks
45%synergy
Chittering Skitterling
47%inclusion246 decks528 decks
46%synergy
Wave of Rats
46%inclusion243 decks528 decks
44%synergy
Changeling Outcast
44%inclusion230 decks528 decks
38%synergy
Ratcatcher
43%inclusion228 decks528 decks
40%synergy
Rat Colony
38%inclusion202 decks528 decks
33%synergy
Ashcoat of the Shadow Swarm
35%inclusion185 decks528 decks
32%synergy
Nezumi Informant
35%inclusion183 decks528 decks
28%synergy
Chittering Witch
34%inclusion180 decks528 decks
30%synergy
Pestilence Rats
34%inclusion178 decks528 decks
32%synergy
Nezumi Prowler
33%inclusion175 decks528 decks
32%synergy
Nashi, Moon Sage's Scion
33%inclusion174 decks528 decks
29%synergy
Ink-Eyes, Servant of Oni
33%inclusion172 decks528 decks
29%synergy
Swarm of Rats
32%inclusion169 decks528 decks
29%synergy
Nezumi Cutthroat
32%inclusion168 decks528 decks
31%synergy
Ruin Rat
32%inclusion167 decks528 decks
30%synergy
Throat Slitter
28%inclusion148 decks528 decks
26%synergy
Engine Rat
28%inclusion93 decks334 decks
26%synergy
Ravenous Rats
26%inclusion139 decks528 decks
25%synergy
Old Flitterfang
26%inclusion137 decks528 decks
25%synergy
Gnawing Vermin
26%inclusion135 decks528 decks
24%synergy
Drainpipe Vermin
26%inclusion135 decks528 decks
24%synergy
Twisted Sewer-Witch
25%inclusion132 decks528 decks
23%synergy
Ruthless Radrat
24%inclusion125 decks528 decks
23%synergy
Razortooth Rats
22%inclusion114 decks528 decks
21%synergy
Locust Miser
21%inclusion111 decks528 decks
19%synergy
Valley Rotcaller
20%inclusion93 decks464 decks
17%synergy
Undercity Dire Rat
19%inclusion52 decks268 decks
18%synergy
Ayara, First of Locthwain
19%inclusion102 decks528 decks
-6%synergy
Species Specialist
19%inclusion100 decks528 decks
15%synergy
Rotting Rats
19%inclusion98 decks528 decks
15%synergy
Crypt Ghast
17%inclusion90 decks528 decks
-31%synergy
Mukotai Ambusher
17%inclusion88 decks528 decks
16%synergy
Nezumi Graverobber
16%inclusion84 decks528 decks
14%synergy
Gray Merchant of Asphodel
16%inclusion83 decks528 decks
-35%synergy
Sinuous Vermin
16%inclusion82 decks528 decks
15%synergy
Okiba-Gang Shinobi
15%inclusion79 decks528 decks
14%synergy
Innocuous Rat
15%inclusion62 decks421 decks
14%synergy
Skullsnatcher
14%inclusion74 decks528 decks
13%synergy
Refurbished Familiar
14%inclusion67 decks492 decks
11%synergy
Nezumi Bladeblesser
13%inclusion67 decks528 decks
12%synergy
Chittering Rats
12%inclusion61 decks528 decks
11%synergy
Adaptive Automaton
11%inclusion59 decks528 decks
10%synergy
Yawgmoth, Thran Physician
11%inclusion58 decks528 decks
1%synergy
Elephant-Rat
11%inclusion24 decks220 decks
11%synergy
Relentless Rats
11%inclusion56 decks528 decks
9%synergy
Daggerfang Duo
10%inclusion47 decks458 decks
10%synergy
Instants
Village Rites
41%inclusion214 decks528 decks
15%synergy
Grim Affliction
40%inclusion211 decks528 decks
38%synergy
Defile
38%inclusion202 decks528 decks
2%synergy
Tainted Strike
34%inclusion181 decks528 decks
31%synergy
Go for the Throat
29%inclusion155 decks528 decks
6%synergy
Rat Out
29%inclusion154 decks528 decks
28%synergy
Anoint with Affliction
26%inclusion135 decks528 decks
25%synergy
Corrupted Conviction
24%inclusion129 decks528 decks
12%synergy
Deadly Dispute
20%inclusion107 decks528 decks
-6%synergy
Virulent Wound
18%inclusion94 decks528 decks
17%synergy
Tragic Slip
18%inclusion93 decks528 decks
-2%synergy
Infernal Grasp
17%inclusion90 decks528 decks
-8%synergy
Withering Torment
16%inclusion68 decks422 decks
-15%synergy
Murder
16%inclusion84 decks528 decks
6%synergy
Fell the Profane
13%inclusion68 decks507 decks
-5%synergy
Malakir Rebirth
13%inclusion68 decks528 decks
-10%synergy
Deadly Rollick
12%inclusion61 decks528 decks
-13%synergy
Foul-Tongue Shriek
11%inclusion59 decks528 decks
9%synergy
Raise the Draugr
11%inclusion57 decks528 decks
10%synergy
Consuming Corruption
10%inclusion52 decks501 decks
-5%synergy
Gravepurge
8.9%inclusion47 decks528 decks
7%synergy
Hero's Downfall
8.7%inclusion46 decks528 decks
2%synergy
Not Dead After All
8.3%inclusion44 decks528 decks
-3%synergy
Bitter Triumph
8.1%inclusion43 decks528 decks
-2%synergy
Doom Blade
7.8%inclusion41 decks528 decks
0%synergy
Sudden Spoiling
7.2%inclusion38 decks528 decks
-2%synergy
Offer Immortality
6.4%inclusion34 decks528 decks
4%synergy
Feign Death
6.1%inclusion32 decks528 decks
-2%synergy
Undying Malice
5.9%inclusion31 decks528 decks
-4%synergy
Sheoldred's Edict
5.7%inclusion30 decks528 decks
-9%synergy
Cabal Ritual
5.7%inclusion30 decks528 decks
-12%synergy
Baleful Mastery
5.7%inclusion30 decks528 decks
-3%synergy
Sorceries
Feed the Swarm
40%inclusion213 decks528 decks
-10%synergy
Revenge of the Rats
37%inclusion146 decks393 decks
34%synergy
Vat Emergence
37%inclusion196 decks528 decks
36%synergy
Crippling Fear
34%inclusion181 decks528 decks
31%synergy
Sign in Blood
32%inclusion170 decks528 decks
-3%synergy
Kindred Dominance
27%inclusion141 decks528 decks
22%synergy
Spread the Sickness
26%inclusion139 decks528 decks
26%synergy
Patriarch's Bidding
26%inclusion135 decks528 decks
21%synergy
Swarmyard Massacre
23%inclusion107 decks458 decks
21%synergy
Night's Whisper
23%inclusion123 decks528 decks
-1%synergy
Read the Bones
21%inclusion111 decks528 decks
4%synergy
Bloodline Bidding
20%inclusion28 decks141 decks
15%synergy
Feed the Infection
18%inclusion94 decks528 decks
17%synergy
Caress of Phyrexia
16%inclusion86 decks528 decks
16%synergy
Unearth
15%inclusion80 decks528 decks
6%synergy
Geth's Summons
15%inclusion79 decks528 decks
15%synergy
Plague of Vermin
14%inclusion74 decks528 decks
12%synergy
Diabolic Tutor
13%inclusion66 decks528 decks
-2%synergy
Toxic Deluge
11%inclusion60 decks528 decks
-25%synergy
Victimize
10%inclusion52 decks528 decks
-17%synergy
Lab Rats
10%inclusion52 decks528 decks
9%synergy
Reanimate
9.5%inclusion50 decks528 decks
-30%synergy
Damnation
9.3%inclusion49 decks528 decks
-11%synergy
Diabolic Intent
9.1%inclusion48 decks528 decks
-6%synergy
Mutilate
9.1%inclusion48 decks528 decks
-8%synergy
Echoing Return
8.9%inclusion47 decks528 decks
6%synergy
Insatiable Avarice
7.6%inclusion40 decks528 decks
-4%synergy
Pact of the Serpent
7.6%inclusion40 decks528 decks
6%synergy
Gruesome Fate
7.4%inclusion39 decks528 decks
5%synergy
Fell
7.3%inclusion34 decks464 decks
4%synergy
Forever Young
7.2%inclusion38 decks528 decks
6%synergy
Bubbling Muck
7.0%inclusion37 decks528 decks
-9%synergy
Haunting Voyage
6.6%inclusion35 decks528 decks
5%synergy
Return from Extinction
5.7%inclusion30 decks528 decks
5%synergy
Psychic Whorl
5.5%inclusion25 decks458 decks
5%synergy
Utility Artifacts
Bontu's Monument
54%inclusion285 decks528 decks
26%synergy
Jet Medallion
52%inclusion273 decks528 decks
-10%synergy
Herald's Horn
43%inclusion227 decks528 decks
37%synergy
Contagion Clasp
40%inclusion212 decks528 decks
38%synergy
Skullclamp
32%inclusion169 decks528 decks
10%synergy
Vanquisher's Banner
29%inclusion153 decks528 decks
25%synergy
Contagion Engine
24%inclusion128 decks528 decks
22%synergy
Swiftfoot Boots
20%inclusion105 decks528 decks
-12%synergy
Grafted Exoskeleton
19%inclusion101 decks528 decks
18%synergy
Prosthetic Injector
14%inclusion76 decks528 decks
14%synergy
Thrumming Stone
13%inclusion69 decks528 decks
9%synergy
Lightning Greaves
13%inclusion69 decks528 decks
-20%synergy
Whip of Erebos
12%inclusion65 decks528 decks
1%synergy
Door of Destinies
12%inclusion64 decks528 decks
10%synergy
Coat of Arms
11%inclusion58 decks528 decks
8%synergy
Icon of Ancestry
10%inclusion54 decks528 decks
9%synergy
Chronicle of Victory
8.4%inclusion12 decks143 decks
5%synergy
Sword of Truth and Justice
8.1%inclusion43 decks528 decks
7%synergy
The Darkness Crystal
7.8%inclusion21 decks269 decks
-12%synergy
Whispersilk Cloak
7.4%inclusion39 decks528 decks
1%synergy
Banner of Kinship
6.9%inclusion27 decks394 decks
5%synergy
Wayfarer's Bauble
6.1%inclusion32 decks528 decks
-9%synergy
Eldrazi Monument
6.1%inclusion32 decks528 decks
4%synergy
Expedition Map
5.9%inclusion31 decks528 decks
-6%synergy
Ashnod's Altar
5.3%inclusion28 decks528 decks
-14%synergy
Vat of Rebirth
5.3%inclusion28 decks528 decks
2%synergy
Enchantments
Necrogen Communion
52%inclusion275 decks528 decks
50%synergy
Phyrexian Arena
40%inclusion212 decks528 decks
0%synergy
Cover of Darkness
38%inclusion202 decks528 decks
35%synergy
Phyresis
34%inclusion181 decks528 decks
32%synergy
Haunted One
22%inclusion117 decks528 decks
19%synergy
Oversold Cemetery
22%inclusion115 decks528 decks
16%synergy
Bad Moon
19%inclusion102 decks528 decks
16%synergy
Grave Pact
17%inclusion91 decks528 decks
-2%synergy
Black Market
15%inclusion78 decks528 decks
-6%synergy
Tribute to Horobi
15%inclusion78 decks528 decks
14%synergy
Black Market Connections
14%inclusion75 decks528 decks
-10%synergy
Lord Skitter's Blessing
10%inclusion55 decks528 decks
10%synergy
Vampiric Rites
10%inclusion53 decks528 decks
4%synergy
Intimidation
9.1%inclusion48 decks528 decks
9%synergy
Relic Putrescence
8.1%inclusion43 decks528 decks
8%synergy
Phyrexian Reclamation
7.6%inclusion40 decks528 decks
-2%synergy
Glistening Oil
7.0%inclusion37 decks528 decks
6%synergy
Snake Cult Initiation
7.0%inclusion37 decks528 decks
7%synergy
Dictate of Erebos
6.3%inclusion33 decks528 decks
-5%synergy
Planeswalkers
Vraska, Betrayal's Sting
39%inclusion206 decks528 decks
36%synergy
Liliana of the Dark Realms
10%inclusion54 decks528 decks
-4%synergy
Utility Lands
Karn's Bastion
63%inclusion333 decks528 decks
59%synergy
Swarmyard
63%inclusion332 decks528 decks
57%synergy
Bojuka Bog
56%inclusion298 decks528 decks
10%synergy
Rogue's Passage
47%inclusion250 decks528 decks
28%synergy
Mudflat Village
43%inclusion203 decks471 decks
40%synergy
Cabal Coffers
37%inclusion196 decks528 decks
-18%synergy
Witch's Cottage
32%inclusion169 decks528 decks
7%synergy
Mortuary Mire
26%inclusion138 decks528 decks
13%synergy
Cabal Stronghold
25%inclusion131 decks528 decks
-10%synergy
Urborg, Tomb of Yawgmoth
24%inclusion129 decks528 decks
-13%synergy
Access Tunnel
23%inclusion120 decks528 decks
20%synergy
Nykthos, Shrine to Nyx
21%inclusion110 decks528 decks
-9%synergy
Three Tree City
20%inclusion95 decks464 decks
16%synergy
Reliquary Tower
20%inclusion103 decks528 decks
-11%synergy
Phyrexian Tower
15%inclusion80 decks528 decks
-10%synergy
Secret Tunnel
14%inclusion25 decks181 decks
13%synergy
Castle Locthwain
13%inclusion71 decks528 decks
-4%synergy
Crypt of Agadeem
13%inclusion69 decks528 decks
2%synergy
Barren Moor
13%inclusion68 decks528 decks
3%synergy
Shizo, Death's Storehouse
10%inclusion55 decks528 decks
0%synergy
War Room
10%inclusion53 decks528 decks
-6%synergy
Inkmoth Nexus
8.1%inclusion43 decks528 decks
7%synergy
Takenuma, Abandoned Mire
8.1%inclusion43 decks528 decks
-8%synergy
The Dross Pits
7.6%inclusion40 decks528 decks
6%synergy
Minas Morgul, Dark Fortress
7.6%inclusion40 decks528 decks
5%synergy
Temple of the False God
7.4%inclusion39 decks528 decks
0%synergy
Everglades
5.1%inclusion27 decks528 decks
4%synergy
Mana Artifacts
Sol Ring
80%inclusion421 decks528 decks
-6%synergy
Glistening Sphere
50%inclusion265 decks528 decks
49%synergy
Arcane Signet
49%inclusion257 decks528 decks
-13%synergy
Staff of Compleation
26%inclusion135 decks528 decks
24%synergy
Patchwork Banner
22%inclusion103 decks461 decks
18%synergy
Charcoal Diamond
19%inclusion100 decks528 decks
-3%synergy
Mind Stone
16%inclusion87 decks528 decks
-13%synergy
Heraldic Banner
14%inclusion74 decks528 decks
9%synergy
Phyrexian Atlas
14%inclusion73 decks528 decks
13%synergy
Caged Sun
8.9%inclusion47 decks528 decks
-2%synergy
The Soul Stone
7.4%inclusion17 decks229 decks
-7%synergy
Commander's Sphere
7.2%inclusion38 decks528 decks
-1%synergy
Thought Vessel
6.4%inclusion34 decks528 decks
-19%synergy
Lands
Swamp
98%inclusion518 decks528 decks
3%synergy
Path of Ancestry
41%inclusion215 decks528 decks
36%synergy
Myriad Landscape
23%inclusion122 decks528 decks
-3%synergy
Cavern of Souls
16%inclusion82 decks528 decks
9%synergy
Fell the Profane
13%inclusion68 decks507 decks
-5%synergy
Malakir Rebirth
13%inclusion68 decks528 decks
-10%synergy
Command Tower
10%inclusion54 decks528 decks
5%synergy
Escape Tunnel
10%inclusion51 decks528 decks
9%synergy
Evolving Wilds
6.8%inclusion36 decks528 decks
3%synergy
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