Karumonix, the Rat King (Commander) - Infect

Karumonix, the Rat King
Rank #398
498decks
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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Enchantments
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Utility Lands
Mana Artifacts
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Stolen Stark Tech
2.6%inclusion1 decks39 decks
1%synergy
Construct a Cosmic Cube
2.0%inclusion1 decks49 decks
0%synergy
High Synergy Cards
Blightbelly Rat
91%inclusion452 decks498 decks
87%synergy
Piper of the Swarm
88%inclusion440 decks498 decks
81%synergy
Ichor Rats
81%inclusion405 decks498 decks
78%synergy
Infectious Inquiry
80%inclusion396 decks498 decks
77%synergy
Marrow-Gnawer
77%inclusion385 decks498 decks
74%synergy
Pack Rat
79%inclusion395 decks498 decks
73%synergy
Ogre Slumlord
82%inclusion407 decks498 decks
72%synergy
Vraska's Fall
73%inclusion366 decks498 decks
70%synergy
Drown in Ichor
72%inclusion360 decks498 decks
69%synergy
Septic Rats
69%inclusion345 decks498 decks
67%synergy
Top Cards
Lord Skitter, Sewer King
75%inclusion374 decks498 decks
67%synergy
Rancid Rats
69%inclusion345 decks498 decks
67%synergy
Typhoid Rats
67%inclusion332 decks498 decks
63%synergy
Lord Skitter's Butcher
63%inclusion316 decks498 decks
60%synergy
Dark Ritual
61%inclusion305 decks498 decks
-6%synergy
Whisper of the Dross
60%inclusion301 decks498 decks
58%synergy
Tangled Colony
60%inclusion299 decks498 decks
57%synergy
Crypt Rats
58%inclusion291 decks498 decks
54%synergy
Phyresis Outbreak
56%inclusion281 decks498 decks
55%synergy
Bontu's Monument
54%inclusion270 decks498 decks
26%synergy
Game Changers
Demonic Tutor
18%inclusion92 decks498 decks
-9%synergy
Bolas's Citadel
12%inclusion61 decks498 decks
-16%synergy
Vampiric Tutor
12%inclusion61 decks498 decks
-9%synergy
Creatures
Voracious Vermin
53%inclusion263 decks498 decks
50%synergy
Stronghold Rats
52%inclusion259 decks498 decks
48%synergy
Burglar Rat
52%inclusion257 decks498 decks
41%synergy
Persistent Marshstalker
48%inclusion240 decks498 decks
45%synergy
Gnat Miser
47%inclusion233 decks498 decks
44%synergy
Chittering Skitterling
44%inclusion220 decks498 decks
43%synergy
Wave of Rats
44%inclusion220 decks498 decks
42%synergy
Rat Colony
43%inclusion212 decks498 decks
37%synergy
Ratcatcher
42%inclusion210 decks498 decks
39%synergy
Changeling Outcast
42%inclusion208 decks498 decks
37%synergy
Ashcoat of the Shadow Swarm
38%inclusion187 decks498 decks
34%synergy
Ink-Eyes, Servant of Oni
33%inclusion165 decks498 decks
30%synergy
Nezumi Prowler
33%inclusion162 decks498 decks
31%synergy
Pestilence Rats
32%inclusion161 decks498 decks
30%synergy
Chittering Witch
32%inclusion160 decks498 decks
28%synergy
Swarm of Rats
31%inclusion156 decks498 decks
29%synergy
Ruin Rat
31%inclusion156 decks498 decks
30%synergy
Nashi, Moon Sage's Scion
31%inclusion155 decks498 decks
27%synergy
Nezumi Informant
30%inclusion151 decks498 decks
24%synergy
Rat King, Pale Piper
30%inclusion45 decks152 decks
26%synergy
Nezumi Cutthroat
29%inclusion146 decks498 decks
29%synergy
Engine Rat
29%inclusion109 decks373 decks
28%synergy
Rat King, Verminister
28%inclusion50 decks178 decks
25%synergy
Ravenous Rats
26%inclusion127 decks498 decks
24%synergy
Throat Slitter
26%inclusion127 decks498 decks
24%synergy
Gnawing Vermin
25%inclusion124 decks498 decks
23%synergy
Drainpipe Vermin
24%inclusion120 decks498 decks
23%synergy
Twisted Sewer-Witch
23%inclusion116 decks498 decks
22%synergy
Old Flitterfang
23%inclusion115 decks498 decks
22%synergy
Razortooth Rats
21%inclusion106 decks498 decks
21%synergy
Valley Rotcaller
21%inclusion106 decks498 decks
19%synergy
Ruthless Radrat
21%inclusion103 decks498 decks
20%synergy
Locust Miser
20%inclusion102 decks498 decks
19%synergy
Species Specialist
19%inclusion97 decks498 decks
16%synergy
Ayara, First of Locthwain
19%inclusion94 decks498 decks
-6%synergy
Undercity Dire Rat
18%inclusion56 decks311 decks
16%synergy
Rotting Rats
17%inclusion87 decks498 decks
14%synergy
Crypt Ghast
17%inclusion85 decks498 decks
-30%synergy
Nezumi Graverobber
16%inclusion78 decks498 decks
14%synergy
Mukotai Ambusher
15%inclusion77 decks498 decks
15%synergy
Gray Merchant of Asphodel
15%inclusion76 decks498 decks
-35%synergy
Sinuous Vermin
15%inclusion75 decks498 decks
15%synergy
Refurbished Familiar
15%inclusion73 decks498 decks
13%synergy
Innocuous Rat
14%inclusion65 decks458 decks
13%synergy
Nezumi Bladeblesser
13%inclusion67 decks498 decks
13%synergy
Skullsnatcher
13%inclusion67 decks498 decks
13%synergy
Okiba-Gang Shinobi
13%inclusion67 decks498 decks
13%synergy
Relentless Rats
12%inclusion62 decks498 decks
11%synergy
Elephant-Rat
11%inclusion30 decks265 decks
11%synergy
Chittering Rats
11%inclusion55 decks498 decks
11%synergy
Instants
Village Rites
39%inclusion196 decks498 decks
14%synergy
Grim Affliction
38%inclusion191 decks498 decks
37%synergy
Defile
37%inclusion185 decks498 decks
2%synergy
Tainted Strike
33%inclusion162 decks498 decks
30%synergy
Go for the Throat
28%inclusion140 decks498 decks
5%synergy
Rat Out
27%inclusion134 decks498 decks
26%synergy
Anoint with Affliction
24%inclusion122 decks498 decks
24%synergy
Corrupted Conviction
22%inclusion109 decks498 decks
9%synergy
Deadly Dispute
19%inclusion94 decks498 decks
-8%synergy
Infernal Grasp
17%inclusion86 decks498 decks
-8%synergy
Virulent Wound
17%inclusion85 decks498 decks
17%synergy
Tragic Slip
16%inclusion82 decks498 decks
-3%synergy
Murder
16%inclusion81 decks498 decks
6%synergy
Withering Torment
16%inclusion73 decks459 decks
-15%synergy
Fell the Profane
15%inclusion74 decks498 decks
-5%synergy
Malakir Rebirth
12%inclusion59 decks498 decks
-11%synergy
Deadly Rollick
11%inclusion57 decks498 decks
-14%synergy
Raise the Draugr
11%inclusion54 decks498 decks
10%synergy
Consuming Corruption
11%inclusion53 decks498 decks
-5%synergy
Foul-Tongue Shriek
11%inclusion53 decks498 decks
9%synergy
Hero's Downfall
8.4%inclusion42 decks498 decks
2%synergy
Gravepurge
8.4%inclusion42 decks498 decks
7%synergy
Doom Blade
7.4%inclusion37 decks498 decks
0%synergy
Cabal Ritual
6.6%inclusion33 decks498 decks
-12%synergy
Bitter Triumph
6.6%inclusion33 decks498 decks
-3%synergy
Sudden Spoiling
6.6%inclusion33 decks498 decks
-2%synergy
Not Dead After All
6.4%inclusion32 decks498 decks
-5%synergy
Feign Death
6.4%inclusion32 decks498 decks
-2%synergy
Offer Immortality
6.2%inclusion31 decks498 decks
4%synergy
Sheoldred's Edict
6.0%inclusion30 decks498 decks
-9%synergy
Culling the Weak
5.8%inclusion29 decks498 decks
-11%synergy
Imp's Mischief
5.6%inclusion28 decks498 decks
-19%synergy
Undying Malice
5.6%inclusion28 decks498 decks
-4%synergy
Baleful Mastery
5.6%inclusion28 decks498 decks
-2%synergy
Altar's Reap
5.0%inclusion25 decks498 decks
3%synergy
Sorceries
Feed the Swarm
39%inclusion195 decks498 decks
-11%synergy
Revenge of the Rats
37%inclusion161 decks431 decks
34%synergy
Vat Emergence
36%inclusion181 decks498 decks
35%synergy
Crippling Fear
33%inclusion165 decks498 decks
30%synergy
Sign in Blood
29%inclusion146 decks498 decks
-6%synergy
Kindred Dominance
27%inclusion133 decks498 decks
22%synergy
Patriarch's Bidding
26%inclusion127 decks498 decks
21%synergy
Spread the Sickness
24%inclusion122 decks498 decks
24%synergy
Swarmyard Massacre
24%inclusion117 decks495 decks
21%synergy
Night's Whisper
22%inclusion111 decks498 decks
-3%synergy
Read the Bones
20%inclusion98 decks498 decks
4%synergy
Bloodline Bidding
19%inclusion35 decks189 decks
14%synergy
Caress of Phyrexia
16%inclusion80 decks498 decks
15%synergy
Feed the Infection
16%inclusion79 decks498 decks
15%synergy
Unearth
14%inclusion71 decks498 decks
5%synergy
Geth's Summons
13%inclusion67 decks498 decks
13%synergy
Plague of Vermin
13%inclusion65 decks498 decks
11%synergy
Diabolic Tutor
12%inclusion62 decks498 decks
-1%synergy
Toxic Deluge
11%inclusion54 decks498 decks
-26%synergy
Damnation
10%inclusion50 decks498 decks
-10%synergy
Victimize
10%inclusion49 decks498 decks
-17%synergy
Reanimate
10%inclusion49 decks498 decks
-30%synergy
Lab Rats
10%inclusion49 decks498 decks
9%synergy
Diabolic Intent
9.4%inclusion47 decks498 decks
-6%synergy
Echoing Return
9.0%inclusion45 decks498 decks
6%synergy
Fell
7.6%inclusion38 decks498 decks
4%synergy
Bubbling Muck
7.4%inclusion37 decks498 decks
-8%synergy
Mutilate
7.2%inclusion36 decks498 decks
-9%synergy
Pact of the Serpent
7.2%inclusion36 decks498 decks
6%synergy
Gruesome Fate
7.0%inclusion35 decks498 decks
5%synergy
Forever Young
6.8%inclusion34 decks498 decks
5%synergy
Insatiable Avarice
6.8%inclusion34 decks498 decks
-4%synergy
Haunting Voyage
6.4%inclusion32 decks498 decks
5%synergy
Return from Extinction
6.0%inclusion30 decks498 decks
6%synergy
Splinter's Technique
5.1%inclusion9 decks178 decks
3%synergy
Psychic Whorl
5.1%inclusion25 decks495 decks
5%synergy
Exsanguinate
5.0%inclusion25 decks498 decks
-20%synergy
Syphon Mind
5.0%inclusion25 decks498 decks
-7%synergy
Grim Tutor
5.0%inclusion25 decks498 decks
-6%synergy
Utility Artifacts
Jet Medallion
53%inclusion265 decks498 decks
-9%synergy
Herald's Horn
43%inclusion212 decks498 decks
37%synergy
Contagion Clasp
39%inclusion195 decks498 decks
37%synergy
Skullclamp
31%inclusion156 decks498 decks
9%synergy
Vanquisher's Banner
28%inclusion137 decks498 decks
24%synergy
Contagion Engine
24%inclusion121 decks498 decks
23%synergy
Swiftfoot Boots
19%inclusion95 decks498 decks
-12%synergy
Grafted Exoskeleton
17%inclusion85 decks498 decks
16%synergy
Prosthetic Injector
15%inclusion73 decks498 decks
14%synergy
Thrumming Stone
14%inclusion68 decks498 decks
10%synergy
Lightning Greaves
13%inclusion65 decks498 decks
-21%synergy
Whip of Erebos
13%inclusion63 decks498 decks
2%synergy
Door of Destinies
12%inclusion62 decks498 decks
10%synergy
Chronicle of Victory
12%inclusion23 decks191 decks
9%synergy
Coat of Arms
11%inclusion54 decks498 decks
8%synergy
Icon of Ancestry
10%inclusion52 decks498 decks
10%synergy
The Darkness Crystal
8.7%inclusion27 decks312 decks
-12%synergy
Banner of Kinship
7.6%inclusion33 decks432 decks
6%synergy
Sword of Truth and Justice
7.6%inclusion38 decks498 decks
7%synergy
Whispersilk Cloak
7.6%inclusion38 decks498 decks
2%synergy
Thornbite Staff
5.6%inclusion28 decks498 decks
3%synergy
Ashnod's Altar
5.4%inclusion27 decks498 decks
-14%synergy
Eldrazi Monument
5.4%inclusion27 decks498 decks
4%synergy
Vat of Rebirth
5.2%inclusion26 decks498 decks
2%synergy
Wayfarer's Bauble
5.2%inclusion26 decks498 decks
-10%synergy
Expedition Map
5.2%inclusion26 decks498 decks
-6%synergy
Throne of Geth
5.0%inclusion25 decks498 decks
5%synergy
Enchantments
Necrogen Communion
49%inclusion246 decks498 decks
48%synergy
Phyrexian Arena
40%inclusion199 decks498 decks
1%synergy
Cover of Darkness
40%inclusion198 decks498 decks
37%synergy
Phyresis
32%inclusion161 decks498 decks
30%synergy
Oversold Cemetery
20%inclusion101 decks498 decks
15%synergy
Bad Moon
20%inclusion98 decks498 decks
17%synergy
Haunted One
19%inclusion97 decks498 decks
17%synergy
Grave Pact
17%inclusion86 decks498 decks
-2%synergy
Black Market Connections
15%inclusion76 decks498 decks
-9%synergy
Black Market
14%inclusion71 decks498 decks
-6%synergy
Tribute to Horobi
14%inclusion70 decks498 decks
13%synergy
Vampiric Rites
10%inclusion49 decks498 decks
4%synergy
Lord Skitter's Blessing
10%inclusion49 decks498 decks
9%synergy
Phyrexian Reclamation
8.8%inclusion44 decks498 decks
-1%synergy
Intimidation
8.8%inclusion44 decks498 decks
8%synergy
Relic Putrescence
8.0%inclusion40 decks498 decks
8%synergy
Glistening Oil
7.8%inclusion39 decks498 decks
7%synergy
Snake Cult Initiation
6.6%inclusion33 decks498 decks
6%synergy
Dictate of Erebos
6.0%inclusion30 decks498 decks
-5%synergy
Planeswalkers
Vraska, Betrayal's Sting
40%inclusion201 decks498 decks
38%synergy
Liliana of the Dark Realms
10%inclusion51 decks498 decks
-4%synergy
Utility Lands
Swarmyard
64%inclusion320 decks498 decks
59%synergy
Karn's Bastion
62%inclusion308 decks498 decks
58%synergy
Bojuka Bog
56%inclusion279 decks498 decks
9%synergy
Rogue's Passage
47%inclusion236 decks498 decks
28%synergy
Mudflat Village
45%inclusion224 decks498 decks
42%synergy
Cabal Coffers
38%inclusion189 decks498 decks
-17%synergy
Witch's Cottage
31%inclusion154 decks498 decks
6%synergy
Mortuary Mire
27%inclusion133 decks498 decks
14%synergy
Cabal Stronghold
25%inclusion124 decks498 decks
-9%synergy
Urborg, Tomb of Yawgmoth
23%inclusion117 decks498 decks
-14%synergy
Access Tunnel
22%inclusion112 decks498 decks
20%synergy
Nykthos, Shrine to Nyx
21%inclusion107 decks498 decks
-8%synergy
Three Tree City
21%inclusion103 decks498 decks
16%synergy
Reliquary Tower
19%inclusion97 decks498 decks
-10%synergy
Phyrexian Tower
16%inclusion80 decks498 decks
-10%synergy
Crypt of Agadeem
13%inclusion65 decks498 decks
2%synergy
Barren Moor
12%inclusion62 decks498 decks
3%synergy
Castle Locthwain
12%inclusion62 decks498 decks
-4%synergy
Secret Tunnel
12%inclusion28 decks228 decks
11%synergy
Shizo, Death's Storehouse
10%inclusion48 decks498 decks
-1%synergy
War Room
10%inclusion48 decks498 decks
-6%synergy
Inkmoth Nexus
7.6%inclusion38 decks498 decks
7%synergy
Takenuma, Abandoned Mire
7.6%inclusion38 decks498 decks
-8%synergy
The Dross Pits
7.0%inclusion35 decks498 decks
6%synergy
Temple of the False God
6.8%inclusion34 decks498 decks
-1%synergy
Minas Morgul, Dark Fortress
6.0%inclusion30 decks498 decks
3%synergy
Memorial to Folly
5.0%inclusion25 decks498 decks
2%synergy
Mana Artifacts
Sol Ring
80%inclusion398 decks498 decks
-6%synergy
Glistening Sphere
48%inclusion239 decks498 decks
47%synergy
Arcane Signet
47%inclusion234 decks498 decks
-15%synergy
Staff of Compleation
26%inclusion130 decks498 decks
24%synergy
Patchwork Banner
23%inclusion117 decks498 decks
19%synergy
Charcoal Diamond
17%inclusion86 decks498 decks
-5%synergy
Mind Stone
15%inclusion74 decks498 decks
-13%synergy
Heraldic Banner
14%inclusion71 decks498 decks
9%synergy
Phyrexian Atlas
13%inclusion63 decks498 decks
12%synergy
Caged Sun
8.4%inclusion42 decks498 decks
-2%synergy
The Soul Stone
6.6%inclusion18 decks274 decks
-9%synergy
Commander's Sphere
6.2%inclusion31 decks498 decks
-2%synergy
Thought Vessel
6.2%inclusion31 decks498 decks
-19%synergy
Lands
Swamp
98%inclusion486 decks498 decks
2%synergy
Path of Ancestry
41%inclusion204 decks498 decks
36%synergy
Myriad Landscape
19%inclusion97 decks498 decks
-5%synergy
Cavern of Souls
16%inclusion79 decks498 decks
9%synergy
Fell the Profane
15%inclusion74 decks498 decks
-5%synergy
Malakir Rebirth
12%inclusion59 decks498 decks
-11%synergy
Big Apple, 3 a.m.
12%inclusion18 decks152 decks
10%synergy
Command Tower
9.4%inclusion47 decks498 decks
4%synergy
Escape Tunnel
8.2%inclusion41 decks498 decks
7%synergy
Evolving Wilds
7.0%inclusion35 decks498 decks
3%synergy
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