Karumonix, the Rat King (Commander) - Optimized

Karumonix, the Rat King
Rank #393
72decks
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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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Arnyn, Deathbloom Botanist
17%inclusion2 decks12 decks
14%synergy
Cheerful Osteomancer
8.3%inclusion1 decks12 decks
8%synergy
Ral Zarek, Guest Lecturer
8.3%inclusion1 decks12 decks
6%synergy
Send in the Pest
8.3%inclusion1 decks12 decks
6%synergy
Decorum Dissertation
8.3%inclusion1 decks12 decks
2%synergy
High Synergy Cards
Marrow-Gnawer
86%inclusion62 decks72 decks
83%synergy
Piper of the Swarm
83%inclusion60 decks72 decks
76%synergy
Blightbelly Rat
76%inclusion55 decks72 decks
73%synergy
Pack Rat
76%inclusion55 decks72 decks
70%synergy
Swarmyard
75%inclusion54 decks72 decks
69%synergy
Ichor Rats
71%inclusion51 decks72 decks
68%synergy
Ogre Slumlord
75%inclusion54 decks72 decks
65%synergy
Lord Skitter, Sewer King
68%inclusion49 decks72 decks
60%synergy
Rat Colony
65%inclusion47 decks72 decks
60%synergy
Infectious Inquiry
51%inclusion37 decks72 decks
49%synergy
Top Cards
Dark Ritual
78%inclusion56 decks72 decks
11%synergy
Jet Medallion
64%inclusion46 decks72 decks
2%synergy
Bontu's Monument
56%inclusion40 decks72 decks
27%synergy
Vraska's Fall
51%inclusion37 decks72 decks
48%synergy
Ashcoat of the Shadow Swarm
51%inclusion37 decks72 decks
48%synergy
Ratcatcher
49%inclusion35 decks72 decks
45%synergy
Rancid Rats
49%inclusion35 decks72 decks
46%synergy
Crypt Rats
47%inclusion34 decks72 decks
43%synergy
Tangled Colony
47%inclusion34 decks72 decks
44%synergy
Typhoid Rats
46%inclusion33 decks72 decks
42%synergy
Game Changers
Demonic Tutor
58%inclusion42 decks72 decks
31%synergy
Vampiric Tutor
49%inclusion35 decks72 decks
28%synergy
Bolas's Citadel
35%inclusion25 decks72 decks
6%synergy
Imperial Seal
25%inclusion18 decks72 decks
18%synergy
Ancient Tomb
19%inclusion14 decks72 decks
8%synergy
Necropotence
18%inclusion13 decks72 decks
3%synergy
Mana Vault
14%inclusion10 decks72 decks
7%synergy
Chrome Mox
11%inclusion8 decks72 decks
5%synergy
Ad Nauseam
11%inclusion8 decks72 decks
8%synergy
Opposition Agent
8.3%inclusion6 decks72 decks
-1%synergy
Creatures
Septic Rats
44%inclusion32 decks72 decks
43%synergy
Lord Skitter's Butcher
42%inclusion30 decks72 decks
38%synergy
Rat King, Verminister
39%inclusion13 decks33 decks
36%synergy
Gnat Miser
39%inclusion28 decks72 decks
36%synergy
Rat King, Pale Piper
38%inclusion10 decks26 decks
34%synergy
Voracious Vermin
33%inclusion24 decks72 decks
30%synergy
Ayara, First of Locthwain
31%inclusion22 decks72 decks
5%synergy
Burglar Rat
31%inclusion22 decks72 decks
20%synergy
Stronghold Rats
31%inclusion22 decks72 decks
27%synergy
Locust Miser
29%inclusion21 decks72 decks
28%synergy
Chittering Witch
29%inclusion21 decks72 decks
25%synergy
Ink-Eyes, Servant of Oni
28%inclusion20 decks72 decks
25%synergy
Swarm of Rats
28%inclusion20 decks72 decks
25%synergy
Chittering Skitterling
26%inclusion19 decks72 decks
25%synergy
Ruin Rat
24%inclusion17 decks72 decks
22%synergy
Persistent Marshstalker
21%inclusion15 decks72 decks
18%synergy
Wave of Rats
21%inclusion15 decks72 decks
19%synergy
Nashi, Moon Sage's Scion
21%inclusion15 decks72 decks
17%synergy
Valley Rotcaller
19%inclusion14 decks72 decks
17%synergy
Pestilence Rats
19%inclusion14 decks72 decks
17%synergy
Changeling Outcast
18%inclusion13 decks72 decks
13%synergy
Nezumi Informant
18%inclusion13 decks72 decks
12%synergy
Ravenous Rats
17%inclusion12 decks72 decks
15%synergy
Species Specialist
17%inclusion12 decks72 decks
13%synergy
Nezumi Prowler
17%inclusion12 decks72 decks
15%synergy
Engine Rat
17%inclusion12 decks72 decks
15%synergy
Twisted Sewer-Witch
15%inclusion11 decks72 decks
14%synergy
Drainpipe Vermin
15%inclusion11 decks72 decks
14%synergy
Skullsnatcher
14%inclusion10 decks72 decks
13%synergy
Filth
14%inclusion10 decks72 decks
11%synergy
Yawgmoth, Thran Physician
14%inclusion10 decks72 decks
4%synergy
Relentless Rats
13%inclusion9 decks72 decks
11%synergy
Gnawing Vermin
13%inclusion9 decks72 decks
11%synergy
Throat Slitter
13%inclusion9 decks72 decks
11%synergy
Nezumi Bone-Reader
13%inclusion9 decks72 decks
12%synergy
Razortooth Rats
13%inclusion9 decks72 decks
12%synergy
Nezumi Cutthroat
13%inclusion9 decks72 decks
12%synergy
Gray Merchant of Asphodel
11%inclusion8 decks72 decks
-40%synergy
Crypt Ghast
11%inclusion8 decks72 decks
-36%synergy
Nezumi Graverobber
10%inclusion7 decks72 decks
8%synergy
Blood Artist
10%inclusion7 decks72 decks
-22%synergy
Zodiac Rat
10%inclusion7 decks72 decks
10%synergy
Old Flitterfang
10%inclusion7 decks72 decks
9%synergy
Ruthless Radrat
8.3%inclusion6 decks72 decks
8%synergy
Skithiryx, the Blight Dragon
8.3%inclusion6 decks72 decks
7%synergy
Undercity Dire Rat
7.0%inclusion4 decks57 decks
5%synergy
Chittering Rats
6.9%inclusion5 decks72 decks
6%synergy
Daggerfang Duo
6.9%inclusion5 decks72 decks
6%synergy
Scrib Nibblers
6.9%inclusion5 decks72 decks
6%synergy
Adaptive Automaton
6.9%inclusion5 decks72 decks
6%synergy
Instants
Village Rites
32%inclusion23 decks72 decks
6%synergy
Whisper of the Dross
32%inclusion23 decks72 decks
29%synergy
Defile
28%inclusion20 decks72 decks
-8%synergy
Go for the Throat
26%inclusion19 decks72 decks
4%synergy
Deadly Rollick
22%inclusion16 decks72 decks
-2%synergy
Tainted Strike
22%inclusion16 decks72 decks
19%synergy
Deadly Dispute
19%inclusion14 decks72 decks
-7%synergy
Grim Affliction
18%inclusion13 decks72 decks
16%synergy
Cabal Ritual
18%inclusion13 decks72 decks
-0%synergy
Culling the Weak
17%inclusion12 decks72 decks
-0%synergy
Tragic Slip
15%inclusion11 decks72 decks
-4%synergy
Murder
15%inclusion11 decks72 decks
5%synergy
Rat Out
13%inclusion9 decks72 decks
11%synergy
Infernal Grasp
13%inclusion9 decks72 decks
-13%synergy
Malakir Rebirth
13%inclusion9 decks72 decks
-11%synergy
Consuming Corruption
11%inclusion8 decks72 decks
-5%synergy
Imp's Mischief
11%inclusion8 decks72 decks
-14%synergy
Corrupted Conviction
11%inclusion8 decks72 decks
-1%synergy
Virulent Wound
10%inclusion7 decks72 decks
9%synergy
Withering Torment
10%inclusion7 decks72 decks
-22%synergy
Entomb
8.3%inclusion6 decks72 decks
-4%synergy
Snuff Out
8.3%inclusion6 decks72 decks
-5%synergy
Anoint with Affliction
8.3%inclusion6 decks72 decks
8%synergy
Withering Boon
8.3%inclusion6 decks72 decks
4%synergy
Fell the Profane
6.9%inclusion5 decks72 decks
-12%synergy
Doom Blade
6.9%inclusion5 decks72 decks
-0%synergy
Foul-Tongue Shriek
6.9%inclusion5 decks72 decks
5%synergy
Baleful Mastery
6.9%inclusion5 decks72 decks
-1%synergy
Sudden Spoiling
6.9%inclusion5 decks72 decks
-2%synergy
Gravepurge
5.6%inclusion4 decks72 decks
4%synergy
Zuko's Conviction
5.0%inclusion2 decks40 decks
4%synergy
Sorceries
Drown in Ichor
46%inclusion33 decks72 decks
42%synergy
Phyresis Outbreak
44%inclusion32 decks72 decks
43%synergy
Feed the Swarm
29%inclusion21 decks72 decks
-21%synergy
Revenge of the Rats
28%inclusion20 decks72 decks
25%synergy
Toxic Deluge
26%inclusion19 decks72 decks
-10%synergy
Diabolic Intent
25%inclusion18 decks72 decks
10%synergy
Patriarch's Bidding
22%inclusion16 decks72 decks
18%synergy
Kindred Dominance
21%inclusion15 decks72 decks
16%synergy
Sign in Blood
19%inclusion14 decks72 decks
-16%synergy
Reanimate
19%inclusion14 decks72 decks
-21%synergy
Diabolic Tutor
18%inclusion13 decks72 decks
4%synergy
Damnation
18%inclusion13 decks72 decks
-2%synergy
Grim Tutor
18%inclusion13 decks72 decks
7%synergy
Vat Emergence
17%inclusion12 decks72 decks
15%synergy
Bloodline Bidding
17%inclusion6 decks36 decks
12%synergy
Plague of Vermin
15%inclusion11 decks72 decks
13%synergy
Swarmyard Massacre
14%inclusion10 decks72 decks
12%synergy
Crippling Fear
14%inclusion10 decks72 decks
11%synergy
Night's Whisper
14%inclusion10 decks72 decks
-11%synergy
Spread the Sickness
13%inclusion9 decks72 decks
12%synergy
Torment of Hailfire
11%inclusion8 decks72 decks
-4%synergy
Read the Bones
11%inclusion8 decks72 decks
-5%synergy
Bubbling Muck
10%inclusion7 decks72 decks
-6%synergy
Echoing Return
10%inclusion7 decks72 decks
7%synergy
Caress of Phyrexia
10%inclusion7 decks72 decks
9%synergy
Gruesome Fate
10%inclusion7 decks72 decks
8%synergy
Victimize
8.3%inclusion6 decks72 decks
-19%synergy
Exsanguinate
8.3%inclusion6 decks72 decks
-16%synergy
In Garruk's Wake
8.3%inclusion6 decks72 decks
5%synergy
Feed the Infection
6.9%inclusion5 decks72 decks
6%synergy
Insatiable Avarice
6.9%inclusion5 decks72 decks
-4%synergy
Geth's Summons
6.9%inclusion5 decks72 decks
7%synergy
Profane Tutor
5.6%inclusion4 decks72 decks
1%synergy
Unearth
5.6%inclusion4 decks72 decks
-3%synergy
Mutilate
5.6%inclusion4 decks72 decks
-11%synergy
Scheming Symmetry
5.6%inclusion4 decks72 decks
1%synergy
Buried Alive
5.6%inclusion4 decks72 decks
-7%synergy
Living Death
5.6%inclusion4 decks72 decks
-5%synergy
Utility Artifacts
Herald's Horn
42%inclusion30 decks72 decks
36%synergy
Skullclamp
39%inclusion28 decks72 decks
17%synergy
Lightning Greaves
31%inclusion22 decks72 decks
-3%synergy
Thornbite Staff
31%inclusion22 decks72 decks
28%synergy
Thrumming Stone
31%inclusion22 decks72 decks
26%synergy
Vanquisher's Banner
29%inclusion21 decks72 decks
25%synergy
Contagion Engine
28%inclusion20 decks72 decks
26%synergy
Swiftfoot Boots
26%inclusion19 decks72 decks
-5%synergy
Contagion Clasp
22%inclusion16 decks72 decks
20%synergy
Coat of Arms
21%inclusion15 decks72 decks
18%synergy
Door of Destinies
17%inclusion12 decks72 decks
15%synergy
Chronicle of Victory
17%inclusion6 decks36 decks
14%synergy
Ashnod's Altar
15%inclusion11 decks72 decks
-5%synergy
Eldrazi Monument
11%inclusion8 decks72 decks
9%synergy
Banner of Kinship
10%inclusion7 decks72 decks
8%synergy
Grafted Exoskeleton
10%inclusion7 decks72 decks
9%synergy
Sensei's Divining Top
8.3%inclusion6 decks72 decks
0%synergy
Whip of Erebos
8.3%inclusion6 decks72 decks
-3%synergy
Akroma's Memorial
8.3%inclusion6 decks72 decks
7%synergy
Wayfarer's Bauble
5.6%inclusion4 decks72 decks
-9%synergy
Prosthetic Injector
5.6%inclusion4 decks72 decks
5%synergy
Sword of Truth and Justice
5.6%inclusion4 decks72 decks
5%synergy
Aetherflux Reservoir
5.6%inclusion4 decks72 decks
-4%synergy
Wishclaw Talisman
5.6%inclusion4 decks72 decks
-1%synergy
Whispersilk Cloak
5.6%inclusion4 decks72 decks
-0%synergy
The Darkness Crystal
5.2%inclusion3 decks58 decks
-15%synergy
Enchantments
Phyrexian Arena
46%inclusion33 decks72 decks
6%synergy
Cover of Darkness
36%inclusion26 decks72 decks
33%synergy
Necrogen Communion
32%inclusion23 decks72 decks
30%synergy
Grave Pact
29%inclusion21 decks72 decks
10%synergy
Contamination
24%inclusion17 decks72 decks
20%synergy
Black Market Connections
24%inclusion17 decks72 decks
-1%synergy
Oversold Cemetery
21%inclusion15 decks72 decks
16%synergy
Phyresis
19%inclusion14 decks72 decks
17%synergy
Black Market
18%inclusion13 decks72 decks
-3%synergy
Haunted One
15%inclusion11 decks72 decks
13%synergy
Bad Moon
15%inclusion11 decks72 decks
12%synergy
The Meathook Massacre
11%inclusion8 decks72 decks
-6%synergy
Dictate of Erebos
10%inclusion7 decks72 decks
-1%synergy
Animate Dead
10%inclusion7 decks72 decks
-8%synergy
Sanguine Bond
8.3%inclusion6 decks72 decks
-3%synergy
No Mercy
8.3%inclusion6 decks72 decks
1%synergy
Exquisite Blood
8.3%inclusion6 decks72 decks
-5%synergy
Vampiric Rites
6.9%inclusion5 decks72 decks
1%synergy
Lord Skitter's Blessing
6.9%inclusion5 decks72 decks
6%synergy
Greed
5.6%inclusion4 decks72 decks
-1%synergy
Phyrexian Reclamation
5.6%inclusion4 decks72 decks
-4%synergy
Painful Quandary
5.6%inclusion4 decks72 decks
-5%synergy
Tribute to Horobi
5.6%inclusion4 decks72 decks
5%synergy
Planeswalkers
Vraska, Betrayal's Sting
36%inclusion26 decks72 decks
34%synergy
Liliana of the Dark Realms
17%inclusion12 decks72 decks
3%synergy
Utility Lands
Cabal Coffers
69%inclusion50 decks72 decks
15%synergy
Bojuka Bog
63%inclusion45 decks72 decks
16%synergy
Urborg, Tomb of Yawgmoth
44%inclusion32 decks72 decks
7%synergy
Karn's Bastion
43%inclusion31 decks72 decks
39%synergy
Cabal Stronghold
35%inclusion25 decks72 decks
0%synergy
Mudflat Village
31%inclusion22 decks72 decks
28%synergy
Witch's Cottage
25%inclusion18 decks72 decks
0%synergy
Phyrexian Tower
24%inclusion17 decks72 decks
-2%synergy
Nykthos, Shrine to Nyx
24%inclusion17 decks72 decks
-6%synergy
Reliquary Tower
22%inclusion16 decks72 decks
-8%synergy
Rogue's Passage
22%inclusion16 decks72 decks
3%synergy
Mortuary Mire
19%inclusion14 decks72 decks
6%synergy
Castle Locthwain
17%inclusion12 decks72 decks
-0%synergy
Three Tree City
15%inclusion11 decks72 decks
11%synergy
War Room
13%inclusion9 decks72 decks
-4%synergy
Crypt of Agadeem
13%inclusion9 decks72 decks
1%synergy
Shizo, Death's Storehouse
10%inclusion7 decks72 decks
-0%synergy
Volrath's Stronghold
10%inclusion7 decks72 decks
6%synergy
Takenuma, Abandoned Mire
10%inclusion7 decks72 decks
-6%synergy
Inkmoth Nexus
8.3%inclusion6 decks72 decks
7%synergy
Secret Tunnel
7.3%inclusion3 decks41 decks
6%synergy
Temple of the False God
6.9%inclusion5 decks72 decks
-1%synergy
Buried Ruin
5.6%inclusion4 decks72 decks
1%synergy
Command Beacon
5.6%inclusion4 decks72 decks
-3%synergy
Access Tunnel
5.6%inclusion4 decks72 decks
3%synergy
Mana Artifacts
Sol Ring
88%inclusion63 decks72 decks
2%synergy
Arcane Signet
40%inclusion29 decks72 decks
-21%synergy
Glistening Sphere
32%inclusion23 decks72 decks
31%synergy
Staff of Compleation
28%inclusion20 decks72 decks
26%synergy
Patchwork Banner
18%inclusion13 decks72 decks
14%synergy
Mind Stone
13%inclusion9 decks72 decks
-16%synergy
Thought Vessel
11%inclusion8 decks72 decks
-14%synergy
Caged Sun
10%inclusion7 decks72 decks
-1%synergy
Lotus Petal
6.9%inclusion5 decks72 decks
-1%synergy
Heraldic Banner
6.9%inclusion5 decks72 decks
2%synergy
The Soul Stone
6.1%inclusion3 decks49 decks
-9%synergy
Everflowing Chalice
5.6%inclusion4 decks72 decks
0%synergy
Charcoal Diamond
5.6%inclusion4 decks72 decks
-16%synergy
Nyx Lotus
5.6%inclusion4 decks72 decks
-0%synergy
Mox Diamond
5.6%inclusion4 decks72 decks
2%synergy
Lands
Swamp
93%inclusion67 decks72 decks
-2%synergy
Cavern of Souls
21%inclusion15 decks72 decks
14%synergy
Path of Ancestry
17%inclusion12 decks72 decks
12%synergy
Myriad Landscape
15%inclusion11 decks72 decks
-10%synergy
Command Tower
13%inclusion9 decks72 decks
7%synergy
Malakir Rebirth
13%inclusion9 decks72 decks
-11%synergy
Big Apple, 3 a.m.
12%inclusion3 decks26 decks
10%synergy
Fell the Profane
6.9%inclusion5 decks72 decks
-12%synergy
Evolving Wilds
6.9%inclusion5 decks72 decks
3%synergy
Snow-Covered Swamp
6.9%inclusion5 decks72 decks
0%synergy
Terramorphic Expanse
5.6%inclusion4 decks72 decks
3%synergy
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