Karumonix, the Rat King (Commander) - Upgraded

Karumonix, the Rat King
Rank #393
318decks
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
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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Emeritus of Woe
2.4%inclusion2 decks85 decks
-6%synergy
Pox Plague
2.4%inclusion2 decks85 decks
-3%synergy
Decorum Dissertation
2.3%inclusion2 decks86 decks
-4%synergy
Send in the Pest
1.2%inclusion1 decks85 decks
-1%synergy
Coercive Impetus
1.1%inclusion1 decks92 decks
1%synergy
High Synergy Cards
Marrow-Gnawer
84%inclusion267 decks318 decks
81%synergy
Piper of the Swarm
81%inclusion258 decks318 decks
74%synergy
Blightbelly Rat
75%inclusion240 decks318 decks
72%synergy
Pack Rat
73%inclusion232 decks318 decks
67%synergy
Ogre Slumlord
75%inclusion240 decks318 decks
66%synergy
Ichor Rats
68%inclusion217 decks318 decks
65%synergy
Lord Skitter, Sewer King
69%inclusion219 decks318 decks
61%synergy
Swarmyard
65%inclusion207 decks318 decks
59%synergy
Infectious Inquiry
61%inclusion193 decks318 decks
58%synergy
Vraska's Fall
56%inclusion179 decks318 decks
53%synergy
Top Cards
Dark Ritual
67%inclusion214 decks318 decks
0%synergy
Bontu's Monument
63%inclusion201 decks318 decks
35%synergy
Jet Medallion
62%inclusion197 decks318 decks
-0%synergy
Rat Colony
56%inclusion178 decks318 decks
50%synergy
Crypt Rats
55%inclusion174 decks318 decks
50%synergy
Typhoid Rats
55%inclusion174 decks318 decks
51%synergy
Drown in Ichor
54%inclusion171 decks318 decks
50%synergy
Septic Rats
52%inclusion165 decks318 decks
50%synergy
Rancid Rats
52%inclusion164 decks318 decks
49%synergy
Tangled Colony
51%inclusion162 decks318 decks
48%synergy
Game Changers
Demonic Tutor
34%inclusion109 decks318 decks
7%synergy
Bolas's Citadel
26%inclusion83 decks318 decks
-2%synergy
Vampiric Tutor
26%inclusion82 decks318 decks
5%synergy
Creatures
Ashcoat of the Shadow Swarm
50%inclusion160 decks318 decks
47%synergy
Lord Skitter's Butcher
48%inclusion154 decks318 decks
45%synergy
Ratcatcher
45%inclusion143 decks318 decks
42%synergy
Voracious Vermin
42%inclusion135 decks318 decks
40%synergy
Persistent Marshstalker
41%inclusion131 decks318 decks
38%synergy
Gnat Miser
41%inclusion131 decks318 decks
38%synergy
Stronghold Rats
38%inclusion122 decks318 decks
35%synergy
Burglar Rat
36%inclusion114 decks318 decks
25%synergy
Ink-Eyes, Servant of Oni
33%inclusion106 decks318 decks
30%synergy
Swarm of Rats
32%inclusion102 decks318 decks
30%synergy
Chittering Skitterling
32%inclusion101 decks318 decks
31%synergy
Wave of Rats
31%inclusion100 decks318 decks
30%synergy
Rat King, Pale Piper
29%inclusion39 decks135 decks
25%synergy
Nashi, Moon Sage's Scion
27%inclusion85 decks318 decks
23%synergy
Changeling Outcast
26%inclusion83 decks318 decks
21%synergy
Ayara, First of Locthwain
26%inclusion82 decks318 decks
0%synergy
Throat Slitter
25%inclusion81 decks318 decks
24%synergy
Chittering Witch
25%inclusion81 decks318 decks
21%synergy
Species Specialist
25%inclusion79 decks318 decks
21%synergy
Ruin Rat
25%inclusion79 decks318 decks
24%synergy
Pestilence Rats
25%inclusion79 decks318 decks
23%synergy
Rat King, Verminister
25%inclusion38 decks153 decks
22%synergy
Crypt Ghast
24%inclusion76 decks318 decks
-23%synergy
Valley Rotcaller
24%inclusion75 decks318 decks
21%synergy
Nezumi Prowler
23%inclusion74 decks318 decks
22%synergy
Undercity Dire Rat
21%inclusion57 decks270 decks
19%synergy
Nezumi Informant
21%inclusion67 decks318 decks
15%synergy
Gray Merchant of Asphodel
20%inclusion64 decks318 decks
-31%synergy
Locust Miser
20%inclusion64 decks318 decks
19%synergy
Twisted Sewer-Witch
20%inclusion64 decks318 decks
19%synergy
Engine Rat
20%inclusion61 decks310 decks
18%synergy
Relentless Rats
19%inclusion59 decks318 decks
17%synergy
Nezumi Cutthroat
18%inclusion58 decks318 decks
18%synergy
Gnawing Vermin
17%inclusion55 decks318 decks
16%synergy
Razortooth Rats
17%inclusion55 decks318 decks
17%synergy
Drainpipe Vermin
15%inclusion48 decks318 decks
14%synergy
Nezumi Graverobber
15%inclusion47 decks318 decks
13%synergy
Old Flitterfang
13%inclusion40 decks318 decks
11%synergy
Refurbished Familiar
12%inclusion39 decks318 decks
10%synergy
Ravenous Rats
12%inclusion39 decks318 decks
11%synergy
Rotting Rats
12%inclusion37 decks318 decks
9%synergy
Yawgmoth, Thran Physician
10%inclusion33 decks318 decks
0%synergy
Okiba-Gang Shinobi
10%inclusion33 decks318 decks
10%synergy
Mukotai Ambusher
10%inclusion32 decks318 decks
9%synergy
Sinuous Vermin
10%inclusion32 decks318 decks
10%synergy
Filth
9.4%inclusion30 decks318 decks
7%synergy
Ruthless Radrat
9.1%inclusion29 decks318 decks
8%synergy
Nezumi Bladeblesser
8.8%inclusion28 decks318 decks
8%synergy
Adaptive Automaton
8.8%inclusion28 decks318 decks
8%synergy
Elephant-Rat
8.6%inclusion20 decks232 decks
8%synergy
Instants
Whisper of the Dross
43%inclusion136 decks318 decks
40%synergy
Defile
31%inclusion98 decks318 decks
-5%synergy
Village Rites
30%inclusion96 decks318 decks
5%synergy
Go for the Throat
30%inclusion95 decks318 decks
7%synergy
Grim Affliction
25%inclusion80 decks318 decks
23%synergy
Tainted Strike
24%inclusion76 decks318 decks
21%synergy
Deadly Dispute
23%inclusion74 decks318 decks
-3%synergy
Deadly Rollick
21%inclusion68 decks318 decks
-3%synergy
Rat Out
21%inclusion67 decks318 decks
20%synergy
Infernal Grasp
19%inclusion60 decks318 decks
-6%synergy
Withering Torment
19%inclusion59 decks315 decks
-13%synergy
Murder
15%inclusion49 decks318 decks
5%synergy
Corrupted Conviction
15%inclusion49 decks318 decks
3%synergy
Tragic Slip
15%inclusion49 decks318 decks
-4%synergy
Culling the Weak
13%inclusion42 decks318 decks
-4%synergy
Malakir Rebirth
13%inclusion40 decks318 decks
-11%synergy
Fell the Profane
12%inclusion37 decks318 decks
-8%synergy
Anoint with Affliction
11%inclusion36 decks318 decks
11%synergy
Cabal Ritual
11%inclusion34 decks318 decks
-8%synergy
Hero's Downfall
10%inclusion33 decks318 decks
4%synergy
Consuming Corruption
10%inclusion31 decks318 decks
-6%synergy
Doom Blade
8.8%inclusion28 decks318 decks
2%synergy
Foul-Tongue Shriek
8.2%inclusion26 decks318 decks
6%synergy
Sudden Spoiling
7.5%inclusion24 decks318 decks
-1%synergy
Raise the Draugr
7.2%inclusion23 decks318 decks
6%synergy
Virulent Wound
6.9%inclusion22 decks318 decks
6%synergy
Imp's Mischief
6.6%inclusion21 decks318 decks
-18%synergy
Sheoldred's Edict
6.0%inclusion19 decks318 decks
-9%synergy
Gravepurge
6.0%inclusion19 decks318 decks
4%synergy
Darkness
5.3%inclusion17 decks318 decks
-5%synergy
Baleful Mastery
5.3%inclusion17 decks318 decks
-3%synergy
Sorceries
Phyresis Outbreak
41%inclusion130 decks318 decks
39%synergy
Feed the Swarm
37%inclusion117 decks318 decks
-14%synergy
Revenge of the Rats
35%inclusion110 decks315 decks
32%synergy
Kindred Dominance
32%inclusion103 decks318 decks
28%synergy
Crippling Fear
25%inclusion78 decks318 decks
22%synergy
Sign in Blood
24%inclusion77 decks318 decks
-11%synergy
Patriarch's Bidding
23%inclusion72 decks318 decks
18%synergy
Vat Emergence
20%inclusion63 decks318 decks
18%synergy
Diabolic Tutor
19%inclusion62 decks318 decks
5%synergy
Swarmyard Massacre
19%inclusion62 decks318 decks
17%synergy
Night's Whisper
19%inclusion60 decks318 decks
-6%synergy
Diabolic Intent
19%inclusion59 decks318 decks
4%synergy
Bloodline Bidding
18%inclusion30 decks163 decks
14%synergy
Spread the Sickness
15%inclusion48 decks318 decks
14%synergy
Toxic Deluge
15%inclusion48 decks318 decks
-22%synergy
Echoing Return
15%inclusion47 decks318 decks
12%synergy
Damnation
14%inclusion43 decks318 decks
-7%synergy
Plague of Vermin
12%inclusion38 decks318 decks
10%synergy
Read the Bones
12%inclusion37 decks318 decks
-5%synergy
Reanimate
12%inclusion37 decks318 decks
-28%synergy
Grim Tutor
11%inclusion35 decks318 decks
-1%synergy
Victimize
11%inclusion34 decks318 decks
-16%synergy
Unearth
10%inclusion33 decks318 decks
2%synergy
Feed the Infection
10%inclusion31 decks318 decks
9%synergy
Bubbling Muck
9.4%inclusion30 decks318 decks
-6%synergy
Geth's Summons
9.4%inclusion30 decks318 decks
9%synergy
Gruesome Fate
8.2%inclusion26 decks318 decks
6%synergy
Mutilate
7.5%inclusion24 decks318 decks
-9%synergy
Pact of the Serpent
7.2%inclusion23 decks318 decks
6%synergy
Caress of Phyrexia
6.9%inclusion22 decks318 decks
6%synergy
Profane Tutor
6.3%inclusion20 decks318 decks
2%synergy
Living Death
6.3%inclusion20 decks318 decks
-4%synergy
Haunting Voyage
6.0%inclusion19 decks318 decks
5%synergy
Exsanguinate
6.0%inclusion19 decks318 decks
-19%synergy
Blasphemous Edict
5.7%inclusion18 decks315 decks
-11%synergy
Lab Rats
5.7%inclusion18 decks318 decks
5%synergy
In Garruk's Wake
5.7%inclusion18 decks318 decks
2%synergy
Insatiable Avarice
5.7%inclusion18 decks318 decks
-6%synergy
Fell
5.0%inclusion16 decks318 decks
2%synergy
Rise of the Dark Realms
5.0%inclusion16 decks318 decks
-8%synergy
Utility Artifacts
Herald's Horn
47%inclusion149 decks318 decks
41%synergy
Skullclamp
37%inclusion118 decks318 decks
15%synergy
Vanquisher's Banner
28%inclusion89 decks318 decks
24%synergy
Thrumming Stone
27%inclusion86 decks318 decks
23%synergy
Contagion Clasp
22%inclusion70 decks318 decks
20%synergy
Swiftfoot Boots
18%inclusion58 decks318 decks
-13%synergy
Coat of Arms
17%inclusion55 decks318 decks
15%synergy
Lightning Greaves
17%inclusion55 decks318 decks
-16%synergy
Door of Destinies
15%inclusion49 decks318 decks
13%synergy
Whip of Erebos
14%inclusion44 decks318 decks
3%synergy
Chronicle of Victory
13%inclusion22 decks164 decks
11%synergy
Contagion Engine
13%inclusion42 decks318 decks
11%synergy
Icon of Ancestry
11%inclusion34 decks318 decks
10%synergy
Banner of Kinship
10%inclusion31 decks315 decks
8%synergy
Ashnod's Altar
9.4%inclusion30 decks318 decks
-10%synergy
Grafted Exoskeleton
8.5%inclusion27 decks318 decks
7%synergy
Thornbite Staff
8.2%inclusion26 decks318 decks
5%synergy
The Darkness Crystal
7.4%inclusion20 decks270 decks
-13%synergy
Wayfarer's Bauble
6.6%inclusion21 decks318 decks
-8%synergy
Sword of Truth and Justice
6.6%inclusion21 decks318 decks
6%synergy
Expedition Map
6.0%inclusion19 decks318 decks
-6%synergy
Eldrazi Monument
6.0%inclusion19 decks318 decks
4%synergy
Sword of the Squeak
5.7%inclusion18 decks318 decks
5%synergy
Urza's Incubator
5.3%inclusion17 decks318 decks
3%synergy
Enchantments
Cover of Darkness
40%inclusion128 decks318 decks
37%synergy
Phyrexian Arena
37%inclusion118 decks318 decks
-2%synergy
Necrogen Communion
31%inclusion98 decks318 decks
29%synergy
Grave Pact
20%inclusion64 decks318 decks
1%synergy
Black Market
20%inclusion63 decks318 decks
-1%synergy
Phyresis
19%inclusion60 decks318 decks
17%synergy
Haunted One
17%inclusion54 decks318 decks
14%synergy
Black Market Connections
17%inclusion54 decks318 decks
-7%synergy
Bad Moon
17%inclusion54 decks318 decks
14%synergy
Oversold Cemetery
14%inclusion45 decks318 decks
9%synergy
Vampiric Rites
8.5%inclusion27 decks318 decks
2%synergy
Tribute to Horobi
7.9%inclusion25 decks318 decks
7%synergy
Dictate of Erebos
7.9%inclusion25 decks318 decks
-3%synergy
Lord Skitter's Blessing
7.5%inclusion24 decks318 decks
7%synergy
The Meathook Massacre
7.2%inclusion23 decks318 decks
-10%synergy
Intimidation
7.2%inclusion23 decks318 decks
7%synergy
Phyrexian Reclamation
6.9%inclusion22 decks318 decks
-3%synergy
Glistening Oil
5.3%inclusion17 decks318 decks
5%synergy
Dark Prophecy
5.3%inclusion17 decks318 decks
2%synergy
Planeswalkers
Vraska, Betrayal's Sting
36%inclusion116 decks318 decks
34%synergy
Liliana of the Dark Realms
13%inclusion42 decks318 decks
-1%synergy
Utility Lands
Cabal Coffers
55%inclusion174 decks318 decks
-0%synergy
Karn's Bastion
49%inclusion156 decks318 decks
45%synergy
Bojuka Bog
48%inclusion153 decks318 decks
1%synergy
Mudflat Village
43%inclusion138 decks318 decks
41%synergy
Rogue's Passage
39%inclusion124 decks318 decks
20%synergy
Urborg, Tomb of Yawgmoth
34%inclusion107 decks318 decks
-4%synergy
Three Tree City
31%inclusion100 decks318 decks
27%synergy
Cabal Stronghold
30%inclusion96 decks318 decks
-4%synergy
Witch's Cottage
30%inclusion95 decks318 decks
5%synergy
Nykthos, Shrine to Nyx
23%inclusion74 decks318 decks
-6%synergy
Reliquary Tower
23%inclusion74 decks318 decks
-7%synergy
Mortuary Mire
21%inclusion68 decks318 decks
8%synergy
Phyrexian Tower
21%inclusion67 decks318 decks
-5%synergy
Castle Locthwain
15%inclusion47 decks318 decks
-2%synergy
Access Tunnel
14%inclusion43 decks318 decks
11%synergy
War Room
13%inclusion40 decks318 decks
-3%synergy
Crypt of Agadeem
12%inclusion39 decks318 decks
1%synergy
Shizo, Death's Storehouse
10%inclusion32 decks318 decks
-0%synergy
Temple of the False God
9.4%inclusion30 decks318 decks
2%synergy
Secret Tunnel
8.8%inclusion17 decks193 decks
8%synergy
Takenuma, Abandoned Mire
7.9%inclusion25 decks318 decks
-8%synergy
Barren Moor
7.5%inclusion24 decks318 decks
-2%synergy
Minas Morgul, Dark Fortress
6.3%inclusion20 decks318 decks
3%synergy
The Black Gate
5.3%inclusion17 decks318 decks
2%synergy
Mutavault
5.0%inclusion16 decks318 decks
4%synergy
Mana Artifacts
Sol Ring
83%inclusion264 decks318 decks
-3%synergy
Arcane Signet
48%inclusion152 decks318 decks
-14%synergy
Glistening Sphere
33%inclusion104 decks318 decks
32%synergy
Patchwork Banner
25%inclusion78 decks318 decks
20%synergy
Staff of Compleation
19%inclusion59 decks318 decks
17%synergy
Charcoal Diamond
15%inclusion49 decks318 decks
-7%synergy
Heraldic Banner
15%inclusion47 decks318 decks
9%synergy
Mind Stone
14%inclusion45 decks318 decks
-14%synergy
The Soul Stone
8.3%inclusion20 decks241 decks
-7%synergy
Caged Sun
7.2%inclusion23 decks318 decks
-4%synergy
Phyrexian Atlas
7.2%inclusion23 decks318 decks
7%synergy
Thought Vessel
6.6%inclusion21 decks318 decks
-19%synergy
Gauntlet of Power
6.3%inclusion20 decks318 decks
3%synergy
Throne of Eldraine
5.3%inclusion17 decks318 decks
-4%synergy
Nyx Lotus
5.0%inclusion16 decks318 decks
-1%synergy
Lands
Swamp
98%inclusion312 decks318 decks
3%synergy
Path of Ancestry
34%inclusion109 decks318 decks
29%synergy
Cavern of Souls
21%inclusion67 decks318 decks
14%synergy
Myriad Landscape
15%inclusion47 decks318 decks
-10%synergy
Malakir Rebirth
13%inclusion40 decks318 decks
-11%synergy
Fell the Profane
12%inclusion37 decks318 decks
-8%synergy
Command Tower
11%inclusion34 decks318 decks
5%synergy
Big Apple, 3 a.m.
7.4%inclusion10 decks135 decks
6%synergy
Evolving Wilds
6.6%inclusion21 decks318 decks
3%synergy
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