Karumonix, the Rat King (Commander) - Optimized

Karumonix, the Rat King
Rank #384
70decks
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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Decorum Dissertation
33%inclusion1 decks3 decks
30%synergy
Rat King, Verminister
24%inclusion7 decks29 decks
21%synergy
Rat King, Pale Piper
19%inclusion4 decks21 decks
15%synergy
Big Apple, 3 a.m.
10%inclusion2 decks21 decks
7%synergy
Shredder's Technique
4.8%inclusion1 decks21 decks
1%synergy
High Synergy Cards
Marrow-Gnawer
87%inclusion61 decks70 decks
84%synergy
Piper of the Swarm
84%inclusion59 decks70 decks
77%synergy
Pack Rat
80%inclusion56 decks70 decks
74%synergy
Blightbelly Rat
76%inclusion53 decks70 decks
72%synergy
Swarmyard
74%inclusion52 decks70 decks
69%synergy
Ichor Rats
71%inclusion50 decks70 decks
68%synergy
Ogre Slumlord
77%inclusion54 decks70 decks
67%synergy
Rat Colony
64%inclusion45 decks70 decks
59%synergy
Lord Skitter, Sewer King
66%inclusion46 decks70 decks
57%synergy
Infectious Inquiry
54%inclusion38 decks70 decks
52%synergy
Top Cards
Dark Ritual
77%inclusion54 decks70 decks
10%synergy
Jet Medallion
64%inclusion45 decks70 decks
3%synergy
Bontu's Monument
59%inclusion41 decks70 decks
30%synergy
Vraska's Fall
54%inclusion38 decks70 decks
51%synergy
Crypt Rats
51%inclusion36 decks70 decks
47%synergy
Ratcatcher
51%inclusion36 decks70 decks
48%synergy
Ashcoat of the Shadow Swarm
50%inclusion35 decks70 decks
47%synergy
Tangled Colony
49%inclusion34 decks70 decks
45%synergy
Drown in Ichor
49%inclusion34 decks70 decks
45%synergy
Phyrexian Arena
49%inclusion34 decks70 decks
9%synergy
Game Changers
Demonic Tutor
56%inclusion39 decks70 decks
28%synergy
Vampiric Tutor
46%inclusion32 decks70 decks
25%synergy
Bolas's Citadel
33%inclusion23 decks70 decks
4%synergy
Imperial Seal
21%inclusion15 decks70 decks
15%synergy
Ancient Tomb
19%inclusion13 decks70 decks
7%synergy
Necropotence
16%inclusion11 decks70 decks
1%synergy
Mana Vault
13%inclusion9 decks70 decks
6%synergy
Chrome Mox
10%inclusion7 decks70 decks
4%synergy
Opposition Agent
7.1%inclusion5 decks70 decks
-2%synergy
Ad Nauseam
7.1%inclusion5 decks70 decks
5%synergy
Creatures
Septic Rats
47%inclusion33 decks70 decks
45%synergy
Rancid Rats
47%inclusion33 decks70 decks
45%synergy
Typhoid Rats
46%inclusion32 decks70 decks
42%synergy
Lord Skitter's Butcher
41%inclusion29 decks70 decks
38%synergy
Gnat Miser
41%inclusion29 decks70 decks
39%synergy
Chittering Witch
33%inclusion23 decks70 decks
28%synergy
Stronghold Rats
33%inclusion23 decks70 decks
29%synergy
Burglar Rat
31%inclusion22 decks70 decks
21%synergy
Ayara, First of Locthwain
30%inclusion21 decks70 decks
4%synergy
Voracious Vermin
30%inclusion21 decks70 decks
27%synergy
Swarm of Rats
29%inclusion20 decks70 decks
26%synergy
Ink-Eyes, Servant of Oni
27%inclusion19 decks70 decks
24%synergy
Locust Miser
27%inclusion19 decks70 decks
26%synergy
Wave of Rats
24%inclusion17 decks70 decks
22%synergy
Chittering Skitterling
24%inclusion17 decks70 decks
23%synergy
Ruin Rat
24%inclusion17 decks70 decks
23%synergy
Pestilence Rats
21%inclusion15 decks70 decks
19%synergy
Nashi, Moon Sage's Scion
21%inclusion15 decks70 decks
18%synergy
Persistent Marshstalker
20%inclusion14 decks70 decks
17%synergy
Changeling Outcast
19%inclusion13 decks70 decks
13%synergy
Species Specialist
17%inclusion12 decks70 decks
14%synergy
Valley Rotcaller
16%inclusion11 decks70 decks
13%synergy
Nezumi Informant
16%inclusion11 decks70 decks
9%synergy
Engine Rat
16%inclusion11 decks70 decks
14%synergy
Relentless Rats
14%inclusion10 decks70 decks
13%synergy
Filth
14%inclusion10 decks70 decks
12%synergy
Throat Slitter
14%inclusion10 decks70 decks
12%synergy
Ravenous Rats
14%inclusion10 decks70 decks
13%synergy
Razortooth Rats
14%inclusion10 decks70 decks
14%synergy
Twisted Sewer-Witch
14%inclusion10 decks70 decks
13%synergy
Skullsnatcher
13%inclusion9 decks70 decks
12%synergy
Crypt Ghast
13%inclusion9 decks70 decks
-35%synergy
Nezumi Prowler
13%inclusion9 decks70 decks
11%synergy
Nezumi Bone-Reader
13%inclusion9 decks70 decks
12%synergy
Old Flitterfang
13%inclusion9 decks70 decks
12%synergy
Drainpipe Vermin
13%inclusion9 decks70 decks
11%synergy
Gnawing Vermin
11%inclusion8 decks70 decks
10%synergy
Gray Merchant of Asphodel
11%inclusion8 decks70 decks
-40%synergy
Yawgmoth, Thran Physician
11%inclusion8 decks70 decks
1%synergy
Nezumi Cutthroat
11%inclusion8 decks70 decks
11%synergy
Nezumi Graverobber
10%inclusion7 decks70 decks
9%synergy
Zodiac Rat
10%inclusion7 decks70 decks
10%synergy
Blood Artist
10%inclusion7 decks70 decks
-22%synergy
Undercity Dire Rat
9.1%inclusion5 decks55 decks
7%synergy
Ruthless Radrat
8.6%inclusion6 decks70 decks
8%synergy
Scrib Nibblers
7.1%inclusion5 decks70 decks
7%synergy
Sinuous Vermin
7.1%inclusion5 decks70 decks
7%synergy
Adaptive Automaton
7.1%inclusion5 decks70 decks
6%synergy
Skithiryx, the Blight Dragon
7.1%inclusion5 decks70 decks
6%synergy
Plague Stinger
5.7%inclusion4 decks70 decks
5%synergy
Instants
Whisper of the Dross
39%inclusion27 decks70 decks
36%synergy
Village Rites
36%inclusion25 decks70 decks
10%synergy
Go for the Throat
29%inclusion20 decks70 decks
6%synergy
Defile
29%inclusion20 decks70 decks
-8%synergy
Deadly Rollick
24%inclusion17 decks70 decks
0%synergy
Grim Affliction
20%inclusion14 decks70 decks
18%synergy
Deadly Dispute
20%inclusion14 decks70 decks
-6%synergy
Tainted Strike
20%inclusion14 decks70 decks
17%synergy
Murder
17%inclusion12 decks70 decks
7%synergy
Cabal Ritual
16%inclusion11 decks70 decks
-2%synergy
Culling the Weak
16%inclusion11 decks70 decks
0%synergy
Tragic Slip
16%inclusion11 decks70 decks
-4%synergy
Rat Out
14%inclusion10 decks70 decks
13%synergy
Imp's Mischief
11%inclusion8 decks70 decks
-13%synergy
Infernal Grasp
11%inclusion8 decks70 decks
-14%synergy
Malakir Rebirth
11%inclusion8 decks70 decks
-11%synergy
Withering Torment
11%inclusion8 decks70 decks
-20%synergy
Consuming Corruption
10%inclusion7 decks70 decks
-6%synergy
Anoint with Affliction
10%inclusion7 decks70 decks
9%synergy
Virulent Wound
10%inclusion7 decks70 decks
10%synergy
Entomb
8.6%inclusion6 decks70 decks
-3%synergy
Withering Boon
8.6%inclusion6 decks70 decks
4%synergy
Corrupted Conviction
8.6%inclusion6 decks70 decks
-4%synergy
Sudden Spoiling
8.6%inclusion6 decks70 decks
0%synergy
Foul-Tongue Shriek
7.1%inclusion5 decks70 decks
5%synergy
Baleful Mastery
7.1%inclusion5 decks70 decks
-1%synergy
Fell the Profane
5.7%inclusion4 decks70 decks
-13%synergy
Snuff Out
5.7%inclusion4 decks70 decks
-7%synergy
Doom Blade
5.7%inclusion4 decks70 decks
-2%synergy
Sorceries
Phyresis Outbreak
47%inclusion33 decks70 decks
45%synergy
Feed the Swarm
31%inclusion22 decks70 decks
-19%synergy
Revenge of the Rats
27%inclusion19 decks70 decks
24%synergy
Diabolic Intent
24%inclusion17 decks70 decks
9%synergy
Toxic Deluge
23%inclusion16 decks70 decks
-14%synergy
Sign in Blood
23%inclusion16 decks70 decks
-13%synergy
Kindred Dominance
23%inclusion16 decks70 decks
18%synergy
Bloodline Bidding
22%inclusion7 decks32 decks
17%synergy
Patriarch's Bidding
20%inclusion14 decks70 decks
16%synergy
Reanimate
20%inclusion14 decks70 decks
-20%synergy
Vat Emergence
19%inclusion13 decks70 decks
17%synergy
Diabolic Tutor
17%inclusion12 decks70 decks
3%synergy
Night's Whisper
17%inclusion12 decks70 decks
-7%synergy
Grim Tutor
16%inclusion11 decks70 decks
4%synergy
Plague of Vermin
16%inclusion11 decks70 decks
13%synergy
Damnation
16%inclusion11 decks70 decks
-5%synergy
Spread the Sickness
14%inclusion10 decks70 decks
14%synergy
Swarmyard Massacre
14%inclusion10 decks70 decks
12%synergy
Read the Bones
14%inclusion10 decks70 decks
-3%synergy
Crippling Fear
11%inclusion8 decks70 decks
8%synergy
Caress of Phyrexia
11%inclusion8 decks70 decks
11%synergy
Echoing Return
10%inclusion7 decks70 decks
7%synergy
Torment of Hailfire
10%inclusion7 decks70 decks
-5%synergy
Feed the Infection
10%inclusion7 decks70 decks
9%synergy
Gruesome Fate
10%inclusion7 decks70 decks
8%synergy
Victimize
8.6%inclusion6 decks70 decks
-18%synergy
Bubbling Muck
8.6%inclusion6 decks70 decks
-7%synergy
In Garruk's Wake
8.6%inclusion6 decks70 decks
5%synergy
Unearth
7.1%inclusion5 decks70 decks
-2%synergy
Geth's Summons
7.1%inclusion5 decks70 decks
7%synergy
Final Parting
7.1%inclusion5 decks70 decks
3%synergy
Profane Tutor
5.7%inclusion4 decks70 decks
1%synergy
Exsanguinate
5.7%inclusion4 decks70 decks
-19%synergy
Buried Alive
5.7%inclusion4 decks70 decks
-6%synergy
Living Death
5.7%inclusion4 decks70 decks
-4%synergy
Insatiable Avarice
5.7%inclusion4 decks70 decks
-6%synergy
Mutilate
5.7%inclusion4 decks70 decks
-11%synergy
Scheming Symmetry
5.7%inclusion4 decks70 decks
1%synergy
Utility Artifacts
Herald's Horn
46%inclusion32 decks70 decks
40%synergy
Skullclamp
33%inclusion23 decks70 decks
11%synergy
Thrumming Stone
31%inclusion22 decks70 decks
27%synergy
Vanquisher's Banner
30%inclusion21 decks70 decks
26%synergy
Lightning Greaves
30%inclusion21 decks70 decks
-4%synergy
Thornbite Staff
30%inclusion21 decks70 decks
27%synergy
Swiftfoot Boots
27%inclusion19 decks70 decks
-4%synergy
Contagion Engine
26%inclusion18 decks70 decks
24%synergy
Chronicle of Victory
25%inclusion8 decks32 decks
22%synergy
Contagion Clasp
24%inclusion17 decks70 decks
22%synergy
Coat of Arms
23%inclusion16 decks70 decks
20%synergy
Door of Destinies
21%inclusion15 decks70 decks
19%synergy
Ashnod's Altar
14%inclusion10 decks70 decks
-6%synergy
Whip of Erebos
11%inclusion8 decks70 decks
1%synergy
Eldrazi Monument
11%inclusion8 decks70 decks
10%synergy
Banner of Kinship
10%inclusion7 decks70 decks
8%synergy
Sensei's Divining Top
8.6%inclusion6 decks70 decks
0%synergy
Grafted Exoskeleton
8.6%inclusion6 decks70 decks
7%synergy
Akroma's Memorial
7.1%inclusion5 decks70 decks
6%synergy
The Darkness Crystal
7.1%inclusion4 decks56 decks
-13%synergy
Wayfarer's Bauble
5.7%inclusion4 decks70 decks
-10%synergy
Aetherflux Reservoir
5.7%inclusion4 decks70 decks
-4%synergy
Wishclaw Talisman
5.7%inclusion4 decks70 decks
-1%synergy
Urza's Incubator
5.7%inclusion4 decks70 decks
4%synergy
Sword of Truth and Justice
5.7%inclusion4 decks70 decks
5%synergy
Prosthetic Injector
5.7%inclusion4 decks70 decks
5%synergy
Enchantments
Cover of Darkness
37%inclusion26 decks70 decks
34%synergy
Grave Pact
31%inclusion22 decks70 decks
12%synergy
Necrogen Communion
31%inclusion22 decks70 decks
30%synergy
Contamination
27%inclusion19 decks70 decks
24%synergy
Oversold Cemetery
23%inclusion16 decks70 decks
18%synergy
Black Market
21%inclusion15 decks70 decks
0%synergy
Phyresis
21%inclusion15 decks70 decks
19%synergy
Black Market Connections
20%inclusion14 decks70 decks
-4%synergy
Bad Moon
17%inclusion12 decks70 decks
14%synergy
The Meathook Massacre
14%inclusion10 decks70 decks
-3%synergy
Haunted One
14%inclusion10 decks70 decks
12%synergy
Animate Dead
10%inclusion7 decks70 decks
-7%synergy
Dictate of Erebos
10%inclusion7 decks70 decks
-1%synergy
Greed
8.6%inclusion6 decks70 decks
2%synergy
Vampiric Rites
8.6%inclusion6 decks70 decks
3%synergy
Sanguine Bond
8.6%inclusion6 decks70 decks
-3%synergy
Exquisite Blood
8.6%inclusion6 decks70 decks
-5%synergy
Lord Skitter's Blessing
8.6%inclusion6 decks70 decks
8%synergy
Tribute to Horobi
7.1%inclusion5 decks70 decks
6%synergy
No Mercy
7.1%inclusion5 decks70 decks
0%synergy
Phyrexian Reclamation
5.7%inclusion4 decks70 decks
-4%synergy
Painful Quandary
5.7%inclusion4 decks70 decks
-4%synergy
Planeswalkers
Vraska, Betrayal's Sting
37%inclusion26 decks70 decks
35%synergy
Liliana of the Dark Realms
17%inclusion12 decks70 decks
3%synergy
Utility Lands
Cabal Coffers
70%inclusion49 decks70 decks
15%synergy
Bojuka Bog
63%inclusion44 decks70 decks
16%synergy
Urborg, Tomb of Yawgmoth
46%inclusion32 decks70 decks
8%synergy
Karn's Bastion
41%inclusion29 decks70 decks
37%synergy
Cabal Stronghold
33%inclusion23 decks70 decks
-2%synergy
Mudflat Village
33%inclusion23 decks70 decks
30%synergy
Mortuary Mire
26%inclusion18 decks70 decks
13%synergy
Witch's Cottage
26%inclusion18 decks70 decks
1%synergy
Phyrexian Tower
24%inclusion17 decks70 decks
-1%synergy
Reliquary Tower
24%inclusion17 decks70 decks
-6%synergy
Rogue's Passage
24%inclusion17 decks70 decks
5%synergy
Nykthos, Shrine to Nyx
21%inclusion15 decks70 decks
-8%synergy
Three Tree City
20%inclusion14 decks70 decks
15%synergy
Castle Locthwain
14%inclusion10 decks70 decks
-3%synergy
Volrath's Stronghold
11%inclusion8 decks70 decks
8%synergy
Crypt of Agadeem
11%inclusion8 decks70 decks
0%synergy
Shizo, Death's Storehouse
10%inclusion7 decks70 decks
0%synergy
War Room
8.6%inclusion6 decks70 decks
-8%synergy
Takenuma, Abandoned Mire
8.6%inclusion6 decks70 decks
-7%synergy
Secret Tunnel
7.9%inclusion3 decks38 decks
7%synergy
Inkmoth Nexus
7.1%inclusion5 decks70 decks
6%synergy
Memorial to Folly
5.7%inclusion4 decks70 decks
3%synergy
Buried Ruin
5.7%inclusion4 decks70 decks
1%synergy
Access Tunnel
5.7%inclusion4 decks70 decks
3%synergy
Temple of the False God
5.7%inclusion4 decks70 decks
-2%synergy
Mana Artifacts
Sol Ring
89%inclusion62 decks70 decks
3%synergy
Arcane Signet
40%inclusion28 decks70 decks
-22%synergy
Glistening Sphere
33%inclusion23 decks70 decks
32%synergy
Staff of Compleation
26%inclusion18 decks70 decks
24%synergy
Patchwork Banner
16%inclusion11 decks70 decks
11%synergy
Mind Stone
13%inclusion9 decks70 decks
-16%synergy
Thought Vessel
11%inclusion8 decks70 decks
-14%synergy
Caged Sun
8.6%inclusion6 decks70 decks
-3%synergy
Everflowing Chalice
7.1%inclusion5 decks70 decks
2%synergy
The Soul Stone
6.5%inclusion3 decks46 decks
-8%synergy
Charcoal Diamond
5.7%inclusion4 decks70 decks
-17%synergy
Lotus Petal
5.7%inclusion4 decks70 decks
-2%synergy
Heraldic Banner
5.7%inclusion4 decks70 decks
0%synergy
Throne of Eldraine
5.7%inclusion4 decks70 decks
-4%synergy
Mox Diamond
5.7%inclusion4 decks70 decks
2%synergy
Lands
Swamp
94%inclusion66 decks70 decks
-1%synergy
Cavern of Souls
24%inclusion17 decks70 decks
18%synergy
Path of Ancestry
20%inclusion14 decks70 decks
15%synergy
Myriad Landscape
16%inclusion11 decks70 decks
-10%synergy
Command Tower
11%inclusion8 decks70 decks
6%synergy
Malakir Rebirth
11%inclusion8 decks70 decks
-11%synergy
Fell the Profane
5.7%inclusion4 decks70 decks
-13%synergy
Evolving Wilds
5.7%inclusion4 decks70 decks
2%synergy
Snow-Covered Swamp
5.7%inclusion4 decks70 decks
-1%synergy
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