Karumonix, the Rat King (Commander) - Upgraded

Karumonix, the Rat King
Rank #385
277decks
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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Enchantments
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Utility Lands
Mana Artifacts
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Rat King, Pale Piper
28%inclusion23 decks81 decks
24%synergy
Rat King, Verminister
24%inclusion24 decks100 decks
21%synergy
Big Apple, 3 a.m.
8.6%inclusion7 decks81 decks
7%synergy
Shredder's Technique
6.1%inclusion5 decks82 decks
2%synergy
Tunnel Rats
4.1%inclusion3 decks73 decks
4%synergy
High Synergy Cards
Marrow-Gnawer
84%inclusion232 decks277 decks
80%synergy
Piper of the Swarm
81%inclusion225 decks277 decks
74%synergy
Blightbelly Rat
76%inclusion210 decks277 decks
72%synergy
Pack Rat
73%inclusion203 decks277 decks
67%synergy
Ichor Rats
70%inclusion193 decks277 decks
67%synergy
Ogre Slumlord
76%inclusion210 decks277 decks
66%synergy
Lord Skitter, Sewer King
69%inclusion190 decks277 decks
60%synergy
Infectious Inquiry
62%inclusion173 decks277 decks
60%synergy
Swarmyard
65%inclusion179 decks277 decks
59%synergy
Vraska's Fall
58%inclusion161 decks277 decks
55%synergy
Top Cards
Dark Ritual
66%inclusion183 decks277 decks
-1%synergy
Bontu's Monument
64%inclusion177 decks277 decks
36%synergy
Jet Medallion
61%inclusion170 decks277 decks
0%synergy
Drown in Ichor
56%inclusion155 decks277 decks
52%synergy
Rat Colony
56%inclusion154 decks277 decks
50%synergy
Typhoid Rats
56%inclusion154 decks277 decks
52%synergy
Crypt Rats
54%inclusion149 decks277 decks
49%synergy
Rancid Rats
52%inclusion145 decks277 decks
50%synergy
Septic Rats
51%inclusion142 decks277 decks
49%synergy
Tangled Colony
51%inclusion141 decks277 decks
48%synergy
Game Changers
Demonic Tutor
32%inclusion89 decks277 decks
5%synergy
Bolas's Citadel
27%inclusion76 decks277 decks
-1%synergy
Vampiric Tutor
25%inclusion69 decks277 decks
4%synergy
Necropotence
5.4%inclusion15 decks277 decks
-9%synergy
Creatures
Lord Skitter's Butcher
50%inclusion139 decks277 decks
47%synergy
Ashcoat of the Shadow Swarm
47%inclusion129 decks277 decks
43%synergy
Ratcatcher
46%inclusion128 decks277 decks
43%synergy
Voracious Vermin
43%inclusion118 decks277 decks
40%synergy
Gnat Miser
43%inclusion118 decks277 decks
40%synergy
Persistent Marshstalker
41%inclusion113 decks277 decks
38%synergy
Stronghold Rats
38%inclusion106 decks277 decks
34%synergy
Burglar Rat
37%inclusion103 decks277 decks
26%synergy
Ink-Eyes, Servant of Oni
34%inclusion94 decks277 decks
31%synergy
Chittering Skitterling
32%inclusion89 decks277 decks
31%synergy
Wave of Rats
31%inclusion87 decks277 decks
30%synergy
Swarm of Rats
31%inclusion87 decks277 decks
29%synergy
Changeling Outcast
27%inclusion76 decks277 decks
22%synergy
Nashi, Moon Sage's Scion
26%inclusion73 decks277 decks
22%synergy
Ayara, First of Locthwain
26%inclusion72 decks277 decks
0%synergy
Throat Slitter
26%inclusion71 decks277 decks
24%synergy
Chittering Witch
26%inclusion71 decks277 decks
21%synergy
Species Specialist
25%inclusion68 decks277 decks
21%synergy
Ruin Rat
25%inclusion68 decks277 decks
23%synergy
Crypt Ghast
24%inclusion66 decks277 decks
-24%synergy
Pestilence Rats
24%inclusion66 decks277 decks
22%synergy
Nezumi Prowler
24%inclusion66 decks277 decks
22%synergy
Valley Rotcaller
23%inclusion64 decks277 decks
20%synergy
Nezumi Informant
22%inclusion62 decks277 decks
16%synergy
Undercity Dire Rat
22%inclusion49 decks226 decks
20%synergy
Gray Merchant of Asphodel
19%inclusion54 decks277 decks
-32%synergy
Twisted Sewer-Witch
19%inclusion54 decks277 decks
18%synergy
Locust Miser
19%inclusion52 decks277 decks
17%synergy
Gnawing Vermin
18%inclusion51 decks277 decks
17%synergy
Relentless Rats
18%inclusion50 decks277 decks
16%synergy
Engine Rat
18%inclusion48 decks269 decks
16%synergy
Razortooth Rats
16%inclusion45 decks277 decks
16%synergy
Nezumi Cutthroat
16%inclusion45 decks277 decks
15%synergy
Nezumi Graverobber
16%inclusion44 decks277 decks
14%synergy
Drainpipe Vermin
14%inclusion39 decks277 decks
13%synergy
Ravenous Rats
13%inclusion36 decks277 decks
11%synergy
Refurbished Familiar
12%inclusion33 decks277 decks
10%synergy
Yawgmoth, Thran Physician
12%inclusion33 decks277 decks
2%synergy
Old Flitterfang
12%inclusion32 decks277 decks
10%synergy
Rotting Rats
10%inclusion29 decks277 decks
7%synergy
Adaptive Automaton
10%inclusion27 decks277 decks
9%synergy
Filth
10%inclusion27 decks277 decks
7%synergy
Mukotai Ambusher
9.4%inclusion26 decks277 decks
9%synergy
Okiba-Gang Shinobi
9.4%inclusion26 decks277 decks
8%synergy
Bog Rats
8.7%inclusion24 decks277 decks
8%synergy
Nezumi Bladeblesser
8.7%inclusion24 decks277 decks
8%synergy
Sinuous Vermin
8.7%inclusion24 decks277 decks
8%synergy
Skullsnatcher
8.3%inclusion23 decks277 decks
8%synergy
Nezumi Bone-Reader
7.9%inclusion22 decks277 decks
7%synergy
Chittering Rats
7.6%inclusion21 decks277 decks
7%synergy
Instants
Whisper of the Dross
42%inclusion116 decks277 decks
39%synergy
Defile
31%inclusion85 decks277 decks
-6%synergy
Go for the Throat
30%inclusion84 decks277 decks
7%synergy
Village Rites
30%inclusion84 decks277 decks
5%synergy
Grim Affliction
25%inclusion70 decks277 decks
23%synergy
Tainted Strike
25%inclusion68 decks277 decks
22%synergy
Deadly Dispute
23%inclusion65 decks277 decks
-2%synergy
Rat Out
21%inclusion59 decks277 decks
20%synergy
Deadly Rollick
20%inclusion56 decks277 decks
-4%synergy
Withering Torment
19%inclusion52 decks274 decks
-13%synergy
Infernal Grasp
18%inclusion50 decks277 decks
-7%synergy
Murder
17%inclusion48 decks277 decks
7%synergy
Corrupted Conviction
16%inclusion45 decks277 decks
4%synergy
Tragic Slip
15%inclusion42 decks277 decks
-5%synergy
Malakir Rebirth
13%inclusion37 decks277 decks
-9%synergy
Anoint with Affliction
12%inclusion34 decks277 decks
12%synergy
Fell the Profane
12%inclusion33 decks277 decks
-7%synergy
Cabal Ritual
12%inclusion32 decks277 decks
-7%synergy
Culling the Weak
11%inclusion31 decks277 decks
-5%synergy
Hero's Downfall
11%inclusion30 decks277 decks
4%synergy
Consuming Corruption
10%inclusion28 decks277 decks
-6%synergy
Doom Blade
10%inclusion27 decks277 decks
2%synergy
Foul-Tongue Shriek
8.7%inclusion24 decks277 decks
7%synergy
Raise the Draugr
7.6%inclusion21 decks277 decks
7%synergy
Sudden Spoiling
6.9%inclusion19 decks277 decks
-2%synergy
Virulent Wound
6.5%inclusion18 decks277 decks
6%synergy
Sheoldred's Edict
6.1%inclusion17 decks277 decks
-8%synergy
Imp's Mischief
5.8%inclusion16 decks277 decks
-19%synergy
Baleful Mastery
5.8%inclusion16 decks277 decks
-3%synergy
Gravepurge
5.4%inclusion15 decks277 decks
4%synergy
Not Dead After All
5.1%inclusion14 decks277 decks
-6%synergy
Sorceries
Phyresis Outbreak
42%inclusion116 decks277 decks
40%synergy
Feed the Swarm
37%inclusion102 decks277 decks
-14%synergy
Revenge of the Rats
34%inclusion94 decks274 decks
31%synergy
Kindred Dominance
33%inclusion92 decks277 decks
28%synergy
Crippling Fear
26%inclusion73 decks277 decks
23%synergy
Patriarch's Bidding
26%inclusion72 decks277 decks
22%synergy
Sign in Blood
26%inclusion72 decks277 decks
-10%synergy
Diabolic Tutor
21%inclusion58 decks277 decks
7%synergy
Bloodline Bidding
21%inclusion23 decks110 decks
16%synergy
Swarmyard Massacre
19%inclusion54 decks277 decks
17%synergy
Night's Whisper
19%inclusion54 decks277 decks
-5%synergy
Vat Emergence
19%inclusion52 decks277 decks
17%synergy
Diabolic Intent
19%inclusion52 decks277 decks
4%synergy
Echoing Return
16%inclusion44 decks277 decks
13%synergy
Toxic Deluge
16%inclusion43 decks277 decks
-21%synergy
Spread the Sickness
14%inclusion39 decks277 decks
13%synergy
Damnation
13%inclusion37 decks277 decks
-7%synergy
Read the Bones
13%inclusion36 decks277 decks
-4%synergy
Reanimate
13%inclusion36 decks277 decks
-27%synergy
Unearth
13%inclusion35 decks277 decks
4%synergy
Grim Tutor
13%inclusion35 decks277 decks
1%synergy
Victimize
12%inclusion32 decks277 decks
-15%synergy
Plague of Vermin
12%inclusion32 decks277 decks
9%synergy
Feed the Infection
10%inclusion28 decks277 decks
9%synergy
Bubbling Muck
9.4%inclusion26 decks277 decks
-6%synergy
Geth's Summons
9.4%inclusion26 decks277 decks
9%synergy
Gruesome Fate
9.0%inclusion25 decks277 decks
7%synergy
Mutilate
8.7%inclusion24 decks277 decks
-9%synergy
Profane Tutor
7.2%inclusion20 decks277 decks
3%synergy
In Garruk's Wake
6.5%inclusion18 decks277 decks
3%synergy
Caress of Phyrexia
6.5%inclusion18 decks277 decks
6%synergy
Living Death
6.1%inclusion17 decks277 decks
-4%synergy
Haunting Voyage
5.8%inclusion16 decks277 decks
5%synergy
Pact of the Serpent
5.8%inclusion16 decks277 decks
4%synergy
Fell
5.8%inclusion16 decks277 decks
2%synergy
Insatiable Avarice
5.8%inclusion16 decks277 decks
-6%synergy
Lab Rats
5.4%inclusion15 decks277 decks
5%synergy
Blasphemous Edict
5.1%inclusion14 decks274 decks
-12%synergy
Secret Salvage
5.1%inclusion14 decks277 decks
4%synergy
Utility Artifacts
Herald's Horn
48%inclusion133 decks277 decks
42%synergy
Skullclamp
38%inclusion104 decks277 decks
16%synergy
Vanquisher's Banner
30%inclusion82 decks277 decks
26%synergy
Thrumming Stone
29%inclusion79 decks277 decks
25%synergy
Contagion Clasp
22%inclusion62 decks277 decks
20%synergy
Swiftfoot Boots
19%inclusion52 decks277 decks
-13%synergy
Coat of Arms
17%inclusion48 decks277 decks
15%synergy
Lightning Greaves
17%inclusion46 decks277 decks
-17%synergy
Door of Destinies
16%inclusion45 decks277 decks
14%synergy
Whip of Erebos
14%inclusion38 decks277 decks
3%synergy
Contagion Engine
13%inclusion35 decks277 decks
11%synergy
Banner of Kinship
11%inclusion30 decks274 decks
9%synergy
Icon of Ancestry
11%inclusion30 decks277 decks
10%synergy
Chronicle of Victory
10%inclusion11 decks111 decks
7%synergy
Grafted Exoskeleton
10%inclusion27 decks277 decks
9%synergy
Ashnod's Altar
9.0%inclusion25 decks277 decks
-11%synergy
Eldrazi Monument
7.6%inclusion21 decks277 decks
6%synergy
Expedition Map
7.2%inclusion20 decks277 decks
-5%synergy
The Darkness Crystal
7.1%inclusion16 decks226 decks
-13%synergy
Wayfarer's Bauble
6.9%inclusion19 decks277 decks
-9%synergy
Thornbite Staff
6.9%inclusion19 decks277 decks
4%synergy
Sword of Truth and Justice
6.9%inclusion19 decks277 decks
6%synergy
Sword of the Squeak
5.4%inclusion15 decks277 decks
5%synergy
Enchantments
Cover of Darkness
40%inclusion110 decks277 decks
37%synergy
Phyrexian Arena
38%inclusion106 decks277 decks
-2%synergy
Necrogen Communion
32%inclusion90 decks277 decks
31%synergy
Grave Pact
20%inclusion56 decks277 decks
1%synergy
Phyresis
19%inclusion52 decks277 decks
17%synergy
Black Market
18%inclusion50 decks277 decks
-3%synergy
Haunted One
17%inclusion47 decks277 decks
14%synergy
Bad Moon
17%inclusion47 decks277 decks
14%synergy
Black Market Connections
15%inclusion42 decks277 decks
-9%synergy
Oversold Cemetery
13%inclusion37 decks277 decks
8%synergy
Vampiric Rites
8.7%inclusion24 decks277 decks
3%synergy
Tribute to Horobi
8.3%inclusion23 decks277 decks
7%synergy
Intimidation
7.2%inclusion20 decks277 decks
7%synergy
Dictate of Erebos
7.2%inclusion20 decks277 decks
-4%synergy
Phyrexian Reclamation
6.9%inclusion19 decks277 decks
-3%synergy
Lord Skitter's Blessing
6.9%inclusion19 decks277 decks
6%synergy
The Meathook Massacre
6.1%inclusion17 decks277 decks
-11%synergy
Glistening Oil
5.4%inclusion15 decks277 decks
5%synergy
Dark Prophecy
5.4%inclusion15 decks277 decks
2%synergy
Planeswalkers
Vraska, Betrayal's Sting
34%inclusion93 decks277 decks
31%synergy
Liliana of the Dark Realms
12%inclusion32 decks277 decks
-2%synergy
Utility Lands
Cabal Coffers
55%inclusion152 decks277 decks
0%synergy
Karn's Bastion
50%inclusion139 decks277 decks
46%synergy
Bojuka Bog
47%inclusion131 decks277 decks
0%synergy
Mudflat Village
44%inclusion123 decks277 decks
42%synergy
Rogue's Passage
39%inclusion108 decks277 decks
20%synergy
Urborg, Tomb of Yawgmoth
36%inclusion100 decks277 decks
-1%synergy
Three Tree City
30%inclusion84 decks277 decks
26%synergy
Cabal Stronghold
30%inclusion83 decks277 decks
-5%synergy
Witch's Cottage
30%inclusion82 decks277 decks
5%synergy
Nykthos, Shrine to Nyx
24%inclusion67 decks277 decks
-6%synergy
Reliquary Tower
23%inclusion63 decks277 decks
-8%synergy
Phyrexian Tower
21%inclusion57 decks277 decks
-5%synergy
Mortuary Mire
20%inclusion56 decks277 decks
7%synergy
Castle Locthwain
15%inclusion42 decks277 decks
-2%synergy
Access Tunnel
14%inclusion39 decks277 decks
11%synergy
War Room
13%inclusion35 decks277 decks
-4%synergy
Secret Tunnel
11%inclusion16 decks142 decks
10%synergy
Crypt of Agadeem
11%inclusion30 decks277 decks
0%synergy
Shizo, Death's Storehouse
10%inclusion29 decks277 decks
0%synergy
Takenuma, Abandoned Mire
8.7%inclusion24 decks277 decks
-7%synergy
Temple of the False God
8.3%inclusion23 decks277 decks
0%synergy
Barren Moor
7.9%inclusion22 decks277 decks
-2%synergy
Mutavault
6.5%inclusion18 decks277 decks
6%synergy
The Black Gate
6.5%inclusion18 decks277 decks
3%synergy
Minas Morgul, Dark Fortress
6.5%inclusion18 decks277 decks
3%synergy
Inkmoth Nexus
5.4%inclusion15 decks277 decks
4%synergy
Mana Artifacts
Sol Ring
83%inclusion229 decks277 decks
-3%synergy
Arcane Signet
47%inclusion131 decks277 decks
-15%synergy
Glistening Sphere
34%inclusion95 decks277 decks
33%synergy
Patchwork Banner
24%inclusion67 decks277 decks
20%synergy
Staff of Compleation
19%inclusion53 decks277 decks
17%synergy
Charcoal Diamond
16%inclusion45 decks277 decks
-6%synergy
Heraldic Banner
16%inclusion43 decks277 decks
10%synergy
Mind Stone
14%inclusion38 decks277 decks
-15%synergy
Phyrexian Atlas
8.3%inclusion23 decks277 decks
8%synergy
The Soul Stone
7.7%inclusion15 decks194 decks
-7%synergy
Caged Sun
7.6%inclusion21 decks277 decks
-4%synergy
Gauntlet of Power
6.5%inclusion18 decks277 decks
3%synergy
Thought Vessel
5.8%inclusion16 decks277 decks
-20%synergy
Throne of Eldraine
5.1%inclusion14 decks277 decks
-5%synergy
Nyx Lotus
5.1%inclusion14 decks277 decks
-1%synergy
Lands
Swamp
99%inclusion275 decks277 decks
4%synergy
Path of Ancestry
35%inclusion97 decks277 decks
30%synergy
Cavern of Souls
22%inclusion62 decks277 decks
16%synergy
Myriad Landscape
14%inclusion39 decks277 decks
-12%synergy
Malakir Rebirth
13%inclusion37 decks277 decks
-9%synergy
Fell the Profane
12%inclusion33 decks277 decks
-7%synergy
Command Tower
11%inclusion30 decks277 decks
5%synergy
Evolving Wilds
6.1%inclusion17 decks277 decks
2%synergy
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