Karumonix, the Rat King (Commander) - Optimized

Karumonix, the Rat King
Rank #412
92decks
As CommanderAs CardAverage DeckDecks
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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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Utility Lands
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Avacyn, Angel of Horror
17%inclusion1 decks6 decks
13%synergy
High Synergy Cards
Marrow-Gnawer
87%inclusion80 decks92 decks
83%synergy
Piper of the Swarm
84%inclusion77 decks92 decks
77%synergy
Blightbelly Rat
79%inclusion73 decks92 decks
76%synergy
Ichor Rats
75%inclusion69 decks92 decks
72%synergy
Pack Rat
77%inclusion71 decks92 decks
71%synergy
Swarmyard
75%inclusion69 decks92 decks
69%synergy
Ogre Slumlord
73%inclusion67 decks92 decks
63%synergy
Lord Skitter, Sewer King
71%inclusion65 decks92 decks
63%synergy
Rat Colony
64%inclusion59 decks92 decks
59%synergy
Ashcoat of the Shadow Swarm
58%inclusion53 decks92 decks
54%synergy
Top Cards
Dark Ritual
79%inclusion73 decks92 decks
12%synergy
Jet Medallion
67%inclusion62 decks92 decks
5%synergy
Infectious Inquiry
57%inclusion52 decks92 decks
54%synergy
Vraska's Fall
54%inclusion50 decks92 decks
51%synergy
Drown in Ichor
54%inclusion50 decks92 decks
51%synergy
Bontu's Monument
52%inclusion48 decks92 decks
24%synergy
Typhoid Rats
49%inclusion45 decks92 decks
45%synergy
Rancid Rats
49%inclusion45 decks92 decks
47%synergy
Tangled Colony
49%inclusion45 decks92 decks
46%synergy
Ratcatcher
48%inclusion44 decks92 decks
45%synergy
Game Changers
Demonic Tutor
63%inclusion58 decks92 decks
36%synergy
Vampiric Tutor
57%inclusion52 decks92 decks
36%synergy
Bolas's Citadel
36%inclusion33 decks92 decks
8%synergy
Imperial Seal
26%inclusion24 decks92 decks
19%synergy
Ancient Tomb
22%inclusion20 decks92 decks
10%synergy
Necropotence
20%inclusion18 decks92 decks
5%synergy
Mana Vault
16%inclusion15 decks92 decks
10%synergy
Chrome Mox
13%inclusion12 decks92 decks
7%synergy
Ad Nauseam
10%inclusion9 decks92 decks
7%synergy
The One Ring
8.7%inclusion8 decks92 decks
-1%synergy
Creatures
Crypt Rats
47%inclusion43 decks92 decks
42%synergy
Lord Skitter's Butcher
46%inclusion42 decks92 decks
43%synergy
Septic Rats
46%inclusion42 decks92 decks
44%synergy
Gnat Miser
39%inclusion36 decks92 decks
37%synergy
Rat King, Pale Piper
37%inclusion19 decks51 decks
34%synergy
Voracious Vermin
33%inclusion30 decks92 decks
30%synergy
Rat King, Verminister
32%inclusion18 decks57 decks
28%synergy
Ink-Eyes, Servant of Oni
30%inclusion28 decks92 decks
27%synergy
Burglar Rat
29%inclusion27 decks92 decks
19%synergy
Ayara, First of Locthwain
29%inclusion27 decks92 decks
4%synergy
Chittering Witch
29%inclusion27 decks92 decks
25%synergy
Stronghold Rats
27%inclusion25 decks92 decks
24%synergy
Locust Miser
25%inclusion23 decks92 decks
24%synergy
Swarm of Rats
25%inclusion23 decks92 decks
23%synergy
Chittering Skitterling
25%inclusion23 decks92 decks
24%synergy
Wave of Rats
24%inclusion22 decks92 decks
22%synergy
Persistent Marshstalker
23%inclusion21 decks92 decks
20%synergy
Pestilence Rats
22%inclusion20 decks92 decks
20%synergy
Nashi, Moon Sage's Scion
22%inclusion20 decks92 decks
18%synergy
Nezumi Prowler
21%inclusion19 decks92 decks
19%synergy
Ruin Rat
20%inclusion18 decks92 decks
18%synergy
Valley Rotcaller
18%inclusion17 decks92 decks
16%synergy
Changeling Outcast
18%inclusion17 decks92 decks
14%synergy
Engine Rat
16%inclusion15 decks92 decks
15%synergy
Nezumi Informant
16%inclusion15 decks92 decks
10%synergy
Throat Slitter
15%inclusion14 decks92 decks
14%synergy
Yawgmoth, Thran Physician
15%inclusion14 decks92 decks
5%synergy
Drainpipe Vermin
15%inclusion14 decks92 decks
14%synergy
Relentless Rats
14%inclusion13 decks92 decks
12%synergy
Ravenous Rats
14%inclusion13 decks92 decks
13%synergy
Filth
14%inclusion13 decks92 decks
12%synergy
Nezumi Cutthroat
14%inclusion13 decks92 decks
13%synergy
Species Specialist
13%inclusion12 decks92 decks
10%synergy
Skullsnatcher
13%inclusion12 decks92 decks
12%synergy
Twisted Sewer-Witch
13%inclusion12 decks92 decks
12%synergy
Crypt Ghast
13%inclusion12 decks92 decks
-34%synergy
Gray Merchant of Asphodel
12%inclusion11 decks92 decks
-38%synergy
Blood Artist
11%inclusion10 decks92 decks
-21%synergy
Gnawing Vermin
11%inclusion10 decks92 decks
9%synergy
Ruthless Radrat
11%inclusion10 decks92 decks
10%synergy
Skithiryx, the Blight Dragon
11%inclusion10 decks92 decks
9%synergy
Nezumi Graverobber
8.7%inclusion8 decks92 decks
7%synergy
Zodiac Rat
8.7%inclusion8 decks92 decks
8%synergy
Razortooth Rats
8.7%inclusion8 decks92 decks
8%synergy
Old Flitterfang
8.7%inclusion8 decks92 decks
8%synergy
Rotting Rats
7.6%inclusion7 decks92 decks
5%synergy
Opposition Agent
7.6%inclusion7 decks92 decks
-2%synergy
Nezumi Bone-Reader
7.6%inclusion7 decks92 decks
7%synergy
Bog Rats
6.5%inclusion6 decks92 decks
6%synergy
Mirkwood Bats
6.5%inclusion6 decks92 decks
-2%synergy
Instants
Whisper of the Dross
35%inclusion32 decks92 decks
32%synergy
Defile
32%inclusion29 decks92 decks
-4%synergy
Village Rites
30%inclusion28 decks92 decks
5%synergy
Deadly Rollick
27%inclusion25 decks92 decks
1%synergy
Go for the Throat
27%inclusion25 decks92 decks
5%synergy
Tainted Strike
24%inclusion22 decks92 decks
21%synergy
Deadly Dispute
22%inclusion20 decks92 decks
-5%synergy
Culling the Weak
21%inclusion19 decks92 decks
2%synergy
Grim Affliction
20%inclusion18 decks92 decks
18%synergy
Cabal Ritual
18%inclusion17 decks92 decks
-1%synergy
Malakir Rebirth
18%inclusion17 decks92 decks
-5%synergy
Infernal Grasp
15%inclusion14 decks92 decks
-10%synergy
Rat Out
14%inclusion13 decks92 decks
13%synergy
Snuff Out
13%inclusion12 decks92 decks
-1%synergy
Withering Torment
13%inclusion12 decks92 decks
-19%synergy
Murder
12%inclusion11 decks92 decks
2%synergy
Tragic Slip
12%inclusion11 decks92 decks
-7%synergy
Fell the Profane
11%inclusion10 decks92 decks
-9%synergy
Consuming Corruption
11%inclusion10 decks92 decks
-4%synergy
Imp's Mischief
10%inclusion9 decks92 decks
-16%synergy
Corrupted Conviction
8.7%inclusion8 decks92 decks
-4%synergy
Entomb
7.6%inclusion7 decks92 decks
-5%synergy
Anoint with Affliction
7.6%inclusion7 decks92 decks
7%synergy
Sudden Spoiling
7.6%inclusion7 decks92 decks
-1%synergy
Withering Boon
6.5%inclusion6 decks92 decks
2%synergy
Fake Your Own Death
6.5%inclusion6 decks92 decks
-1%synergy
Baleful Mastery
6.5%inclusion6 decks92 decks
-1%synergy
Songs of the Damned
5.4%inclusion5 decks92 decks
-0%synergy
Doom Blade
5.4%inclusion5 decks92 decks
-1%synergy
Virulent Wound
5.4%inclusion5 decks92 decks
5%synergy
Offer Immortality
5.4%inclusion5 decks92 decks
4%synergy
Sorceries
Phyresis Outbreak
45%inclusion41 decks92 decks
43%synergy
Revenge of the Rats
33%inclusion30 decks92 decks
30%synergy
Feed the Swarm
33%inclusion30 decks92 decks
-18%synergy
Toxic Deluge
32%inclusion29 decks92 decks
-5%synergy
Patriarch's Bidding
30%inclusion28 decks92 decks
27%synergy
Diabolic Intent
28%inclusion26 decks92 decks
13%synergy
Kindred Dominance
24%inclusion22 decks92 decks
19%synergy
Reanimate
23%inclusion21 decks92 decks
-18%synergy
Sign in Blood
20%inclusion18 decks92 decks
-15%synergy
Damnation
20%inclusion18 decks92 decks
-0%synergy
Swarmyard Massacre
17%inclusion16 decks92 decks
15%synergy
Crippling Fear
17%inclusion16 decks92 decks
15%synergy
Grim Tutor
16%inclusion15 decks92 decks
5%synergy
Diabolic Tutor
15%inclusion14 decks92 decks
2%synergy
Plague of Vermin
15%inclusion14 decks92 decks
13%synergy
Vat Emergence
14%inclusion13 decks92 decks
13%synergy
Bloodline Bidding
14%inclusion8 decks59 decks
10%synergy
Torment of Hailfire
13%inclusion12 decks92 decks
-2%synergy
Night's Whisper
13%inclusion12 decks92 decks
-12%synergy
Echoing Return
12%inclusion11 decks92 decks
9%synergy
Spread the Sickness
11%inclusion10 decks92 decks
10%synergy
Victimize
8.7%inclusion8 decks92 decks
-19%synergy
Bubbling Muck
8.7%inclusion8 decks92 decks
-7%synergy
Read the Bones
8.7%inclusion8 decks92 decks
-7%synergy
Caress of Phyrexia
8.7%inclusion8 decks92 decks
8%synergy
Gruesome Fate
8.7%inclusion8 decks92 decks
7%synergy
Agadeem's Awakening
7.6%inclusion7 decks92 decks
-0%synergy
Exsanguinate
7.6%inclusion7 decks92 decks
-17%synergy
Lab Rats
6.5%inclusion6 decks92 decks
6%synergy
Feed the Infection
5.4%inclusion5 decks92 decks
5%synergy
Mutilate
5.4%inclusion5 decks92 decks
-10%synergy
Scheming Symmetry
5.4%inclusion5 decks92 decks
1%synergy
Buried Alive
5.4%inclusion5 decks92 decks
-7%synergy
Living Death
5.4%inclusion5 decks92 decks
-5%synergy
In Garruk's Wake
5.4%inclusion5 decks92 decks
2%synergy
Insatiable Avarice
5.4%inclusion5 decks92 decks
-5%synergy
Pact of the Serpent
5.4%inclusion5 decks92 decks
4%synergy
Utility Artifacts
Skullclamp
42%inclusion39 decks92 decks
20%synergy
Herald's Horn
41%inclusion38 decks92 decks
36%synergy
Thrumming Stone
32%inclusion29 decks92 decks
28%synergy
Thornbite Staff
32%inclusion29 decks92 decks
29%synergy
Lightning Greaves
28%inclusion26 decks92 decks
-6%synergy
Contagion Engine
27%inclusion25 decks92 decks
26%synergy
Vanquisher's Banner
27%inclusion25 decks92 decks
23%synergy
Contagion Clasp
22%inclusion20 decks92 decks
20%synergy
Ashnod's Altar
18%inclusion17 decks92 decks
-2%synergy
Coat of Arms
18%inclusion17 decks92 decks
16%synergy
Swiftfoot Boots
18%inclusion17 decks92 decks
-13%synergy
Door of Destinies
15%inclusion14 decks92 decks
13%synergy
Chronicle of Victory
14%inclusion8 decks59 decks
11%synergy
Grafted Exoskeleton
11%inclusion10 decks92 decks
10%synergy
Whip of Erebos
10%inclusion9 decks92 decks
-1%synergy
Sensei's Divining Top
8.7%inclusion8 decks92 decks
1%synergy
Banner of Kinship
8.7%inclusion8 decks92 decks
7%synergy
Eldrazi Monument
8.7%inclusion8 decks92 decks
7%synergy
The Darkness Crystal
7.7%inclusion6 decks78 decks
-12%synergy
Sword of Truth and Justice
7.6%inclusion7 decks92 decks
7%synergy
Phyrexian Altar
7.6%inclusion7 decks92 decks
-6%synergy
Akroma's Memorial
7.6%inclusion7 decks92 decks
7%synergy
Prosthetic Injector
6.5%inclusion6 decks92 decks
6%synergy
Wayfarer's Bauble
5.4%inclusion5 decks92 decks
-9%synergy
Hall of Triumph
5.4%inclusion5 decks92 decks
5%synergy
Enchantments
Phyrexian Arena
45%inclusion41 decks92 decks
5%synergy
Cover of Darkness
38%inclusion35 decks92 decks
35%synergy
Necrogen Communion
33%inclusion30 decks92 decks
31%synergy
Black Market Connections
29%inclusion27 decks92 decks
4%synergy
Grave Pact
28%inclusion26 decks92 decks
9%synergy
Contamination
24%inclusion22 decks92 decks
21%synergy
Phyresis
21%inclusion19 decks92 decks
19%synergy
Black Market
20%inclusion18 decks92 decks
-1%synergy
Oversold Cemetery
20%inclusion18 decks92 decks
14%synergy
Haunted One
14%inclusion13 decks92 decks
12%synergy
The Meathook Massacre
13%inclusion12 decks92 decks
-4%synergy
Bad Moon
12%inclusion11 decks92 decks
9%synergy
Dictate of Erebos
8.7%inclusion8 decks92 decks
-2%synergy
Animate Dead
8.7%inclusion8 decks92 decks
-9%synergy
Sanguine Bond
7.6%inclusion7 decks92 decks
-4%synergy
Tribute to Horobi
7.6%inclusion7 decks92 decks
7%synergy
No Mercy
7.6%inclusion7 decks92 decks
0%synergy
Lord Skitter's Blessing
7.6%inclusion7 decks92 decks
7%synergy
Phyrexian Reclamation
6.5%inclusion6 decks92 decks
-3%synergy
Exquisite Blood
6.5%inclusion6 decks92 decks
-6%synergy
Glistening Oil
5.4%inclusion5 decks92 decks
5%synergy
Vampiric Rites
5.4%inclusion5 decks92 decks
-1%synergy
Bastion of Remembrance
5.4%inclusion5 decks92 decks
-12%synergy
Planeswalkers
Vraska, Betrayal's Sting
39%inclusion36 decks92 decks
37%synergy
Liliana of the Dark Realms
12%inclusion11 decks92 decks
-2%synergy
Utility Lands
Cabal Coffers
72%inclusion66 decks92 decks
17%synergy
Bojuka Bog
63%inclusion58 decks92 decks
16%synergy
Urborg, Tomb of Yawgmoth
50%inclusion46 decks92 decks
12%synergy
Karn's Bastion
45%inclusion41 decks92 decks
41%synergy
Cabal Stronghold
37%inclusion34 decks92 decks
3%synergy
Phyrexian Tower
34%inclusion31 decks92 decks
7%synergy
Mudflat Village
32%inclusion29 decks92 decks
29%synergy
Nykthos, Shrine to Nyx
30%inclusion28 decks92 decks
1%synergy
Witch's Cottage
28%inclusion26 decks92 decks
4%synergy
Reliquary Tower
25%inclusion23 decks92 decks
-4%synergy
Rogue's Passage
23%inclusion21 decks92 decks
3%synergy
Castle Locthwain
22%inclusion20 decks92 decks
5%synergy
Mortuary Mire
20%inclusion18 decks92 decks
7%synergy
Three Tree City
18%inclusion17 decks92 decks
14%synergy
Takenuma, Abandoned Mire
17%inclusion16 decks92 decks
2%synergy
War Room
16%inclusion15 decks92 decks
0%synergy
Crypt of Agadeem
15%inclusion14 decks92 decks
4%synergy
Shizo, Death's Storehouse
14%inclusion13 decks92 decks
4%synergy
Inkmoth Nexus
11%inclusion10 decks92 decks
10%synergy
Barren Moor
8.7%inclusion8 decks92 decks
-1%synergy
Volrath's Stronghold
8.7%inclusion8 decks92 decks
5%synergy
Urza's Saga
7.6%inclusion7 decks92 decks
-0%synergy
Westvale Abbey
6.5%inclusion6 decks92 decks
0%synergy
The Black Gate
6.5%inclusion6 decks92 decks
3%synergy
Buried Ruin
5.4%inclusion5 decks92 decks
0%synergy
Mutavault
5.4%inclusion5 decks92 decks
5%synergy
Access Tunnel
5.4%inclusion5 decks92 decks
2%synergy
Mana Artifacts
Sol Ring
88%inclusion81 decks92 decks
3%synergy
Arcane Signet
46%inclusion42 decks92 decks
-16%synergy
Glistening Sphere
35%inclusion32 decks92 decks
34%synergy
Staff of Compleation
28%inclusion26 decks92 decks
27%synergy
Patchwork Banner
14%inclusion13 decks92 decks
10%synergy
Lotus Petal
10%inclusion9 decks92 decks
2%synergy
Thought Vessel
8.7%inclusion8 decks92 decks
-15%synergy
Caged Sun
7.6%inclusion7 decks92 decks
-2%synergy
Charcoal Diamond
7.6%inclusion7 decks92 decks
-14%synergy
Mind Stone
7.6%inclusion7 decks92 decks
-20%synergy
Mox Diamond
7.6%inclusion7 decks92 decks
4%synergy
The Soul Stone
7.1%inclusion5 decks70 decks
-9%synergy
Nyx Lotus
6.5%inclusion6 decks92 decks
1%synergy
Heraldic Banner
5.4%inclusion5 decks92 decks
0%synergy
Lands
Swamp
95%inclusion87 decks92 decks
-1%synergy
Cavern of Souls
24%inclusion22 decks92 decks
17%synergy
Path of Ancestry
21%inclusion19 decks92 decks
16%synergy
Malakir Rebirth
18%inclusion17 decks92 decks
-5%synergy
Big Apple, 3 a.m.
16%inclusion8 decks51 decks
14%synergy
Myriad Landscape
15%inclusion14 decks92 decks
-9%synergy
Fell the Profane
11%inclusion10 decks92 decks
-9%synergy
Command Tower
10%inclusion9 decks92 decks
4%synergy
Agadeem's Awakening
7.6%inclusion7 decks92 decks
-0%synergy
Snow-Covered Swamp
6.5%inclusion6 decks92 decks
0%synergy
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