Karumonix, the Rat King (Commander) - Optimized

Karumonix, the Rat King
Rank #400
78decks
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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Utility Lands
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Marrow-Gnawer
87%inclusion68 decks78 decks
84%synergy
Piper of the Swarm
83%inclusion65 decks78 decks
76%synergy
Blightbelly Rat
78%inclusion61 decks78 decks
75%synergy
Pack Rat
77%inclusion60 decks78 decks
71%synergy
Ichor Rats
73%inclusion57 decks78 decks
70%synergy
Swarmyard
74%inclusion58 decks78 decks
69%synergy
Ogre Slumlord
74%inclusion58 decks78 decks
65%synergy
Lord Skitter, Sewer King
71%inclusion55 decks78 decks
62%synergy
Rat Colony
64%inclusion50 decks78 decks
59%synergy
Ashcoat of the Shadow Swarm
54%inclusion42 decks78 decks
50%synergy
Top Cards
Dark Ritual
79%inclusion62 decks78 decks
13%synergy
Jet Medallion
64%inclusion50 decks78 decks
2%synergy
Bontu's Monument
58%inclusion45 decks78 decks
29%synergy
Infectious Inquiry
53%inclusion41 decks78 decks
50%synergy
Vraska's Fall
51%inclusion40 decks78 decks
48%synergy
Rancid Rats
47%inclusion37 decks78 decks
45%synergy
Drown in Ichor
47%inclusion37 decks78 decks
44%synergy
Ratcatcher
47%inclusion37 decks78 decks
44%synergy
Tangled Colony
46%inclusion36 decks78 decks
43%synergy
Crypt Rats
45%inclusion35 decks78 decks
40%synergy
Game Changers
Demonic Tutor
59%inclusion46 decks78 decks
32%synergy
Vampiric Tutor
50%inclusion39 decks78 decks
29%synergy
Bolas's Citadel
36%inclusion28 decks78 decks
8%synergy
Imperial Seal
24%inclusion19 decks78 decks
17%synergy
Ancient Tomb
18%inclusion14 decks78 decks
6%synergy
Necropotence
17%inclusion13 decks78 decks
2%synergy
Mana Vault
13%inclusion10 decks78 decks
6%synergy
Chrome Mox
13%inclusion10 decks78 decks
7%synergy
Ad Nauseam
10%inclusion8 decks78 decks
7%synergy
Opposition Agent
7.7%inclusion6 decks78 decks
-2%synergy
Creatures
Typhoid Rats
45%inclusion35 decks78 decks
41%synergy
Septic Rats
42%inclusion33 decks78 decks
41%synergy
Lord Skitter's Butcher
41%inclusion32 decks78 decks
38%synergy
Rat King, Verminister
41%inclusion16 decks39 decks
38%synergy
Gnat Miser
40%inclusion31 decks78 decks
37%synergy
Rat King, Pale Piper
38%inclusion12 decks32 decks
33%synergy
Voracious Vermin
32%inclusion25 decks78 decks
29%synergy
Stronghold Rats
31%inclusion24 decks78 decks
27%synergy
Burglar Rat
29%inclusion23 decks78 decks
19%synergy
Locust Miser
29%inclusion23 decks78 decks
28%synergy
Chittering Witch
29%inclusion23 decks78 decks
25%synergy
Ink-Eyes, Servant of Oni
28%inclusion22 decks78 decks
25%synergy
Ayara, First of Locthwain
28%inclusion22 decks78 decks
3%synergy
Swarm of Rats
26%inclusion20 decks78 decks
23%synergy
Chittering Skitterling
26%inclusion20 decks78 decks
25%synergy
Persistent Marshstalker
24%inclusion19 decks78 decks
21%synergy
Wave of Rats
22%inclusion17 decks78 decks
20%synergy
Nashi, Moon Sage's Scion
21%inclusion16 decks78 decks
17%synergy
Ruin Rat
21%inclusion16 decks78 decks
19%synergy
Valley Rotcaller
21%inclusion16 decks78 decks
18%synergy
Changeling Outcast
18%inclusion14 decks78 decks
13%synergy
Pestilence Rats
18%inclusion14 decks78 decks
16%synergy
Species Specialist
17%inclusion13 decks78 decks
13%synergy
Engine Rat
17%inclusion13 decks78 decks
15%synergy
Nezumi Informant
17%inclusion13 decks78 decks
10%synergy
Ravenous Rats
15%inclusion12 decks78 decks
14%synergy
Nezumi Prowler
15%inclusion12 decks78 decks
14%synergy
Twisted Sewer-Witch
14%inclusion11 decks78 decks
13%synergy
Yawgmoth, Thran Physician
14%inclusion11 decks78 decks
4%synergy
Drainpipe Vermin
14%inclusion11 decks78 decks
13%synergy
Relentless Rats
13%inclusion10 decks78 decks
11%synergy
Gnawing Vermin
13%inclusion10 decks78 decks
11%synergy
Skullsnatcher
13%inclusion10 decks78 decks
12%synergy
Throat Slitter
13%inclusion10 decks78 decks
11%synergy
Filth
13%inclusion10 decks78 decks
10%synergy
Nezumi Cutthroat
13%inclusion10 decks78 decks
12%synergy
Crypt Ghast
12%inclusion9 decks78 decks
-36%synergy
Nezumi Bone-Reader
12%inclusion9 decks78 decks
11%synergy
Razortooth Rats
12%inclusion9 decks78 decks
11%synergy
Blood Artist
10%inclusion8 decks78 decks
-22%synergy
Gray Merchant of Asphodel
10%inclusion8 decks78 decks
-40%synergy
Old Flitterfang
10%inclusion8 decks78 decks
9%synergy
Arnyn, Deathbloom Botanist
10%inclusion2 decks20 decks
7%synergy
Nezumi Graverobber
9.0%inclusion7 decks78 decks
8%synergy
Zodiac Rat
9.0%inclusion7 decks78 decks
9%synergy
Chittering Rats
7.7%inclusion6 decks78 decks
7%synergy
Ruthless Radrat
7.7%inclusion6 decks78 decks
7%synergy
Skithiryx, the Blight Dragon
7.7%inclusion6 decks78 decks
6%synergy
Rotting Rats
6.4%inclusion5 decks78 decks
3%synergy
Scrib Nibblers
6.4%inclusion5 decks78 decks
6%synergy
Instants
Whisper of the Dross
33%inclusion26 decks78 decks
31%synergy
Village Rites
29%inclusion23 decks78 decks
4%synergy
Defile
28%inclusion22 decks78 decks
-7%synergy
Go for the Throat
26%inclusion20 decks78 decks
3%synergy
Tainted Strike
26%inclusion20 decks78 decks
23%synergy
Deadly Rollick
24%inclusion19 decks78 decks
-1%synergy
Deadly Dispute
21%inclusion16 decks78 decks
-6%synergy
Culling the Weak
21%inclusion16 decks78 decks
3%synergy
Grim Affliction
18%inclusion14 decks78 decks
16%synergy
Cabal Ritual
18%inclusion14 decks78 decks
-1%synergy
Tragic Slip
14%inclusion11 decks78 decks
-5%synergy
Murder
14%inclusion11 decks78 decks
4%synergy
Rat Out
13%inclusion10 decks78 decks
11%synergy
Malakir Rebirth
13%inclusion10 decks78 decks
-10%synergy
Infernal Grasp
13%inclusion10 decks78 decks
-12%synergy
Imp's Mischief
12%inclusion9 decks78 decks
-13%synergy
Withering Torment
12%inclusion9 decks78 decks
-20%synergy
Fell the Profane
10%inclusion8 decks78 decks
-9%synergy
Snuff Out
10%inclusion8 decks78 decks
-3%synergy
Consuming Corruption
10%inclusion8 decks78 decks
-5%synergy
Corrupted Conviction
10%inclusion8 decks78 decks
-2%synergy
Anoint with Affliction
9.0%inclusion7 decks78 decks
8%synergy
Virulent Wound
9.0%inclusion7 decks78 decks
9%synergy
Entomb
7.7%inclusion6 decks78 decks
-5%synergy
Doom Blade
7.7%inclusion6 decks78 decks
1%synergy
Withering Boon
7.7%inclusion6 decks78 decks
3%synergy
Sudden Spoiling
7.7%inclusion6 decks78 decks
-1%synergy
Baleful Mastery
6.4%inclusion5 decks78 decks
-2%synergy
Foul-Tongue Shriek
6.4%inclusion5 decks78 decks
5%synergy
Undying Malice
5.1%inclusion4 decks78 decks
-5%synergy
Fake Your Own Death
5.1%inclusion4 decks78 decks
-2%synergy
Gravepurge
5.1%inclusion4 decks78 decks
4%synergy
Rabid Attack
5.0%inclusion1 decks20 decks
4%synergy
Sorceries
Phyresis Outbreak
45%inclusion35 decks78 decks
43%synergy
Feed the Swarm
32%inclusion25 decks78 decks
-18%synergy
Revenge of the Rats
31%inclusion24 decks78 decks
28%synergy
Toxic Deluge
27%inclusion21 decks78 decks
-10%synergy
Diabolic Intent
24%inclusion19 decks78 decks
9%synergy
Patriarch's Bidding
24%inclusion19 decks78 decks
20%synergy
Kindred Dominance
23%inclusion18 decks78 decks
18%synergy
Reanimate
21%inclusion16 decks78 decks
-20%synergy
Sign in Blood
21%inclusion16 decks78 decks
-15%synergy
Damnation
19%inclusion15 decks78 decks
-1%synergy
Grim Tutor
19%inclusion15 decks78 decks
8%synergy
Bloodline Bidding
19%inclusion8 decks42 decks
15%synergy
Diabolic Tutor
18%inclusion14 decks78 decks
4%synergy
Swarmyard Massacre
17%inclusion13 decks78 decks
14%synergy
Vat Emergence
15%inclusion12 decks78 decks
14%synergy
Plague of Vermin
15%inclusion12 decks78 decks
13%synergy
Night's Whisper
14%inclusion11 decks78 decks
-11%synergy
Crippling Fear
13%inclusion10 decks78 decks
10%synergy
Spread the Sickness
12%inclusion9 decks78 decks
11%synergy
Echoing Return
12%inclusion9 decks78 decks
8%synergy
Read the Bones
12%inclusion9 decks78 decks
-5%synergy
Torment of Hailfire
10%inclusion8 decks78 decks
-5%synergy
Decorum Dissertation
10%inclusion2 decks20 decks
4%synergy
Bubbling Muck
9.0%inclusion7 decks78 decks
-7%synergy
Caress of Phyrexia
9.0%inclusion7 decks78 decks
8%synergy
Gruesome Fate
9.0%inclusion7 decks78 decks
7%synergy
Feed the Infection
7.7%inclusion6 decks78 decks
7%synergy
Victimize
7.7%inclusion6 decks78 decks
-20%synergy
In Garruk's Wake
7.7%inclusion6 decks78 decks
4%synergy
Exsanguinate
7.7%inclusion6 decks78 decks
-17%synergy
Unearth
6.4%inclusion5 decks78 decks
-2%synergy
Insatiable Avarice
6.4%inclusion5 decks78 decks
-5%synergy
Geth's Summons
6.4%inclusion5 decks78 decks
6%synergy
Secret Salvage
6.4%inclusion5 decks78 decks
5%synergy
Profane Tutor
5.1%inclusion4 decks78 decks
1%synergy
Agadeem's Awakening
5.1%inclusion4 decks78 decks
-2%synergy
Mutilate
5.1%inclusion4 decks78 decks
-11%synergy
Scheming Symmetry
5.1%inclusion4 decks78 decks
1%synergy
Pact of the Serpent
5.1%inclusion4 decks78 decks
3%synergy
Buried Alive
5.1%inclusion4 decks78 decks
-7%synergy
Living Death
5.1%inclusion4 decks78 decks
-5%synergy
Send in the Pest
5.0%inclusion1 decks20 decks
3%synergy
Utility Artifacts
Herald's Horn
41%inclusion32 decks78 decks
35%synergy
Skullclamp
40%inclusion31 decks78 decks
17%synergy
Thrumming Stone
29%inclusion23 decks78 decks
25%synergy
Lightning Greaves
29%inclusion23 decks78 decks
-4%synergy
Contagion Engine
28%inclusion22 decks78 decks
26%synergy
Vanquisher's Banner
28%inclusion22 decks78 decks
24%synergy
Thornbite Staff
28%inclusion22 decks78 decks
25%synergy
Swiftfoot Boots
24%inclusion19 decks78 decks
-7%synergy
Contagion Clasp
22%inclusion17 decks78 decks
20%synergy
Coat of Arms
19%inclusion15 decks78 decks
17%synergy
Chronicle of Victory
19%inclusion8 decks42 decks
16%synergy
Ashnod's Altar
17%inclusion13 decks78 decks
-3%synergy
Door of Destinies
15%inclusion12 decks78 decks
13%synergy
Eldrazi Monument
10%inclusion8 decks78 decks
9%synergy
Sensei's Divining Top
9.0%inclusion7 decks78 decks
1%synergy
Whip of Erebos
9.0%inclusion7 decks78 decks
-2%synergy
Banner of Kinship
9.0%inclusion7 decks78 decks
7%synergy
Akroma's Memorial
9.0%inclusion7 decks78 decks
8%synergy
Grafted Exoskeleton
9.0%inclusion7 decks78 decks
8%synergy
The Darkness Crystal
7.8%inclusion5 decks64 decks
-12%synergy
Aetherflux Reservoir
6.4%inclusion5 decks78 decks
-3%synergy
Phyrexian Altar
6.4%inclusion5 decks78 decks
-7%synergy
Whispersilk Cloak
6.4%inclusion5 decks78 decks
0%synergy
The One Ring
5.1%inclusion4 decks78 decks
-4%synergy
Wayfarer's Bauble
5.1%inclusion4 decks78 decks
-10%synergy
Sword of Truth and Justice
5.1%inclusion4 decks78 decks
4%synergy
Prosthetic Injector
5.1%inclusion4 decks78 decks
5%synergy
Wishclaw Talisman
5.1%inclusion4 decks78 decks
-2%synergy
Expedition Map
5.1%inclusion4 decks78 decks
-6%synergy
Enchantments
Phyrexian Arena
45%inclusion35 decks78 decks
5%synergy
Cover of Darkness
36%inclusion28 decks78 decks
33%synergy
Necrogen Communion
32%inclusion25 decks78 decks
30%synergy
Grave Pact
27%inclusion21 decks78 decks
7%synergy
Black Market Connections
26%inclusion20 decks78 decks
1%synergy
Contamination
24%inclusion19 decks78 decks
21%synergy
Phyresis
19%inclusion15 decks78 decks
17%synergy
Oversold Cemetery
19%inclusion15 decks78 decks
14%synergy
Black Market
18%inclusion14 decks78 decks
-3%synergy
Haunted One
15%inclusion12 decks78 decks
13%synergy
Bad Moon
14%inclusion11 decks78 decks
11%synergy
The Meathook Massacre
12%inclusion9 decks78 decks
-6%synergy
Dictate of Erebos
9.0%inclusion7 decks78 decks
-2%synergy
Animate Dead
9.0%inclusion7 decks78 decks
-8%synergy
Sanguine Bond
7.7%inclusion6 decks78 decks
-4%synergy
Exquisite Blood
7.7%inclusion6 decks78 decks
-5%synergy
No Mercy
7.7%inclusion6 decks78 decks
0%synergy
Vampiric Rites
6.4%inclusion5 decks78 decks
0%synergy
Lord Skitter's Blessing
6.4%inclusion5 decks78 decks
6%synergy
Greed
5.1%inclusion4 decks78 decks
-1%synergy
Phyrexian Reclamation
5.1%inclusion4 decks78 decks
-5%synergy
Dark Prophecy
5.1%inclusion4 decks78 decks
1%synergy
Tribute to Horobi
5.1%inclusion4 decks78 decks
4%synergy
Painful Quandary
5.1%inclusion4 decks78 decks
-5%synergy
Planeswalkers
Vraska, Betrayal's Sting
38%inclusion30 decks78 decks
36%synergy
Liliana of the Dark Realms
18%inclusion14 decks78 decks
4%synergy
Ral Zarek, Guest Lecturer
5.0%inclusion1 decks20 decks
3%synergy
Utility Lands
Cabal Coffers
71%inclusion55 decks78 decks
16%synergy
Bojuka Bog
62%inclusion48 decks78 decks
15%synergy
Urborg, Tomb of Yawgmoth
46%inclusion36 decks78 decks
9%synergy
Karn's Bastion
42%inclusion33 decks78 decks
39%synergy
Cabal Stronghold
36%inclusion28 decks78 decks
2%synergy
Mudflat Village
31%inclusion24 decks78 decks
28%synergy
Nykthos, Shrine to Nyx
26%inclusion20 decks78 decks
-4%synergy
Phyrexian Tower
24%inclusion19 decks78 decks
-2%synergy
Witch's Cottage
24%inclusion19 decks78 decks
-0%synergy
Reliquary Tower
22%inclusion17 decks78 decks
-8%synergy
Rogue's Passage
22%inclusion17 decks78 decks
3%synergy
Mortuary Mire
21%inclusion16 decks78 decks
8%synergy
Castle Locthwain
19%inclusion15 decks78 decks
3%synergy
Three Tree City
18%inclusion14 decks78 decks
13%synergy
War Room
17%inclusion13 decks78 decks
1%synergy
Crypt of Agadeem
14%inclusion11 decks78 decks
3%synergy
Shizo, Death's Storehouse
12%inclusion9 decks78 decks
1%synergy
Takenuma, Abandoned Mire
12%inclusion9 decks78 decks
-4%synergy
Volrath's Stronghold
9.0%inclusion7 decks78 decks
5%synergy
Inkmoth Nexus
7.7%inclusion6 decks78 decks
7%synergy
Buried Ruin
6.4%inclusion5 decks78 decks
1%synergy
The Black Gate
6.4%inclusion5 decks78 decks
3%synergy
Barren Moor
6.4%inclusion5 decks78 decks
-3%synergy
Temple of the False God
6.4%inclusion5 decks78 decks
-1%synergy
Access Tunnel
6.4%inclusion5 decks78 decks
3%synergy
Secret Tunnel
6.4%inclusion3 decks47 decks
5%synergy
Memorial to Folly
5.1%inclusion4 decks78 decks
2%synergy
Command Beacon
5.1%inclusion4 decks78 decks
-3%synergy
Mana Artifacts
Sol Ring
87%inclusion68 decks78 decks
2%synergy
Arcane Signet
40%inclusion31 decks78 decks
-22%synergy
Glistening Sphere
33%inclusion26 decks78 decks
32%synergy
Staff of Compleation
29%inclusion23 decks78 decks
28%synergy
Patchwork Banner
17%inclusion13 decks78 decks
12%synergy
Mind Stone
12%inclusion9 decks78 decks
-17%synergy
Thought Vessel
10%inclusion8 decks78 decks
-15%synergy
Caged Sun
9.0%inclusion7 decks78 decks
-2%synergy
Nyx Lotus
9.0%inclusion7 decks78 decks
3%synergy
The Soul Stone
7.3%inclusion4 decks55 decks
-8%synergy
Lotus Petal
6.4%inclusion5 decks78 decks
-1%synergy
Heraldic Banner
6.4%inclusion5 decks78 decks
1%synergy
Mox Diamond
6.4%inclusion5 decks78 decks
3%synergy
Everflowing Chalice
5.1%inclusion4 decks78 decks
-0%synergy
Charcoal Diamond
5.1%inclusion4 decks78 decks
-17%synergy
Throne of Eldraine
5.1%inclusion4 decks78 decks
-4%synergy
Lands
Swamp
94%inclusion73 decks78 decks
-2%synergy
Cavern of Souls
22%inclusion17 decks78 decks
15%synergy
Path of Ancestry
18%inclusion14 decks78 decks
13%synergy
Big Apple, 3 a.m.
16%inclusion5 decks32 decks
14%synergy
Myriad Landscape
15%inclusion12 decks78 decks
-9%synergy
Malakir Rebirth
13%inclusion10 decks78 decks
-10%synergy
Command Tower
12%inclusion9 decks78 decks
6%synergy
Fell the Profane
10%inclusion8 decks78 decks
-9%synergy
Evolving Wilds
6.4%inclusion5 decks78 decks
3%synergy
Snow-Covered Swamp
6.4%inclusion5 decks78 decks
-0%synergy
Terramorphic Expanse
5.1%inclusion4 decks78 decks
2%synergy
Agadeem's Awakening
5.1%inclusion4 decks78 decks
-2%synergy
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