Karumonix, the Rat King (Commander) - Optimized

Karumonix, the Rat King
Rank #381
68decks
As CommanderAs CardAverage DeckDecks
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Budget
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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
Planeswalkers
Utility Lands
Mana Artifacts
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Decorum Dissertation
25%inclusion1 decks4 decks
20%synergy
High Synergy Cards
Marrow-Gnawer
88%inclusion60 decks68 decks
85%synergy
Piper of the Swarm
84%inclusion57 decks68 decks
77%synergy
Pack Rat
79%inclusion54 decks68 decks
73%synergy
Blightbelly Rat
75%inclusion51 decks68 decks
71%synergy
Swarmyard
76%inclusion52 decks68 decks
71%synergy
Ichor Rats
71%inclusion48 decks68 decks
68%synergy
Ogre Slumlord
76%inclusion52 decks68 decks
66%synergy
Rat Colony
66%inclusion45 decks68 decks
61%synergy
Lord Skitter, Sewer King
66%inclusion45 decks68 decks
58%synergy
Infectious Inquiry
53%inclusion36 decks68 decks
50%synergy
Top Cards
Dark Ritual
76%inclusion52 decks68 decks
10%synergy
Jet Medallion
65%inclusion44 decks68 decks
3%synergy
Bontu's Monument
57%inclusion39 decks68 decks
29%synergy
Vraska's Fall
53%inclusion36 decks68 decks
50%synergy
Crypt Rats
50%inclusion34 decks68 decks
45%synergy
Ashcoat of the Shadow Swarm
50%inclusion34 decks68 decks
47%synergy
Ratcatcher
50%inclusion34 decks68 decks
47%synergy
Tangled Colony
49%inclusion33 decks68 decks
45%synergy
Phyrexian Arena
49%inclusion33 decks68 decks
9%synergy
Drown in Ichor
47%inclusion32 decks68 decks
43%synergy
Game Changers
Demonic Tutor
56%inclusion38 decks68 decks
29%synergy
Vampiric Tutor
46%inclusion31 decks68 decks
25%synergy
Bolas's Citadel
32%inclusion22 decks68 decks
4%synergy
Imperial Seal
21%inclusion14 decks68 decks
14%synergy
Ancient Tomb
19%inclusion13 decks68 decks
8%synergy
Necropotence
16%inclusion11 decks68 decks
2%synergy
Mana Vault
13%inclusion9 decks68 decks
7%synergy
Chrome Mox
10%inclusion7 decks68 decks
4%synergy
Opposition Agent
7.4%inclusion5 decks68 decks
-2%synergy
Ad Nauseam
7.4%inclusion5 decks68 decks
5%synergy
Creatures
Septic Rats
46%inclusion31 decks68 decks
44%synergy
Rancid Rats
46%inclusion31 decks68 decks
43%synergy
Typhoid Rats
46%inclusion31 decks68 decks
42%synergy
Gnat Miser
44%inclusion30 decks68 decks
41%synergy
Lord Skitter's Butcher
41%inclusion28 decks68 decks
38%synergy
Stronghold Rats
34%inclusion23 decks68 decks
30%synergy
Burglar Rat
31%inclusion21 decks68 decks
20%synergy
Ayara, First of Locthwain
31%inclusion21 decks68 decks
5%synergy
Chittering Witch
31%inclusion21 decks68 decks
26%synergy
Locust Miser
29%inclusion20 decks68 decks
28%synergy
Swarm of Rats
29%inclusion20 decks68 decks
27%synergy
Voracious Vermin
29%inclusion20 decks68 decks
26%synergy
Rat King, Verminister
29%inclusion8 decks28 decks
25%synergy
Ink-Eyes, Servant of Oni
28%inclusion19 decks68 decks
25%synergy
Chittering Skitterling
25%inclusion17 decks68 decks
24%synergy
Ruin Rat
25%inclusion17 decks68 decks
24%synergy
Nashi, Moon Sage's Scion
22%inclusion15 decks68 decks
18%synergy
Persistent Marshstalker
21%inclusion14 decks68 decks
18%synergy
Wave of Rats
21%inclusion14 decks68 decks
19%synergy
Pestilence Rats
21%inclusion14 decks68 decks
19%synergy
Changeling Outcast
19%inclusion13 decks68 decks
14%synergy
Rat King, Pale Piper
19%inclusion4 decks21 decks
15%synergy
Species Specialist
16%inclusion11 decks68 decks
13%synergy
Valley Rotcaller
16%inclusion11 decks68 decks
13%synergy
Nezumi Informant
16%inclusion11 decks68 decks
10%synergy
Relentless Rats
15%inclusion10 decks68 decks
13%synergy
Ravenous Rats
15%inclusion10 decks68 decks
13%synergy
Engine Rat
15%inclusion10 decks68 decks
13%synergy
Filth
13%inclusion9 decks68 decks
11%synergy
Skullsnatcher
13%inclusion9 decks68 decks
13%synergy
Throat Slitter
13%inclusion9 decks68 decks
11%synergy
Razortooth Rats
13%inclusion9 decks68 decks
13%synergy
Nezumi Prowler
13%inclusion9 decks68 decks
12%synergy
Drainpipe Vermin
13%inclusion9 decks68 decks
12%synergy
Twisted Sewer-Witch
13%inclusion9 decks68 decks
12%synergy
Crypt Ghast
13%inclusion9 decks68 decks
-34%synergy
Gnawing Vermin
12%inclusion8 decks68 decks
10%synergy
Gray Merchant of Asphodel
12%inclusion8 decks68 decks
-39%synergy
Yawgmoth, Thran Physician
12%inclusion8 decks68 decks
2%synergy
Nezumi Cutthroat
12%inclusion8 decks68 decks
11%synergy
Nezumi Bone-Reader
12%inclusion8 decks68 decks
11%synergy
Old Flitterfang
12%inclusion8 decks68 decks
11%synergy
Nezumi Graverobber
10%inclusion7 decks68 decks
9%synergy
Blood Artist
10%inclusion7 decks68 decks
-22%synergy
Zodiac Rat
10%inclusion7 decks68 decks
10%synergy
Undercity Dire Rat
9.4%inclusion5 decks53 decks
8%synergy
Ruthless Radrat
8.8%inclusion6 decks68 decks
8%synergy
Adaptive Automaton
7.4%inclusion5 decks68 decks
6%synergy
Sinuous Vermin
7.4%inclusion5 decks68 decks
7%synergy
Scrib Nibblers
7.4%inclusion5 decks68 decks
7%synergy
Instants
Whisper of the Dross
37%inclusion25 decks68 decks
34%synergy
Village Rites
34%inclusion23 decks68 decks
8%synergy
Defile
29%inclusion20 decks68 decks
-7%synergy
Go for the Throat
28%inclusion19 decks68 decks
5%synergy
Deadly Rollick
24%inclusion16 decks68 decks
-1%synergy
Deadly Dispute
21%inclusion14 decks68 decks
-5%synergy
Tainted Strike
19%inclusion13 decks68 decks
16%synergy
Grim Affliction
18%inclusion12 decks68 decks
16%synergy
Cabal Ritual
16%inclusion11 decks68 decks
-2%synergy
Culling the Weak
16%inclusion11 decks68 decks
0%synergy
Murder
15%inclusion10 decks68 decks
5%synergy
Tragic Slip
15%inclusion10 decks68 decks
-5%synergy
Imp's Mischief
12%inclusion8 decks68 decks
-13%synergy
Rat Out
12%inclusion8 decks68 decks
10%synergy
Infernal Grasp
12%inclusion8 decks68 decks
-13%synergy
Malakir Rebirth
12%inclusion8 decks68 decks
-11%synergy
Withering Torment
12%inclusion8 decks68 decks
-20%synergy
Consuming Corruption
10%inclusion7 decks68 decks
-5%synergy
Anoint with Affliction
10%inclusion7 decks68 decks
10%synergy
Virulent Wound
10%inclusion7 decks68 decks
10%synergy
Withering Boon
8.8%inclusion6 decks68 decks
4%synergy
Corrupted Conviction
8.8%inclusion6 decks68 decks
-4%synergy
Sudden Spoiling
8.8%inclusion6 decks68 decks
0%synergy
Entomb
7.4%inclusion5 decks68 decks
-5%synergy
Foul-Tongue Shriek
7.4%inclusion5 decks68 decks
6%synergy
Baleful Mastery
7.4%inclusion5 decks68 decks
-1%synergy
Fell the Profane
5.9%inclusion4 decks68 decks
-13%synergy
Snuff Out
5.9%inclusion4 decks68 decks
-7%synergy
Doom Blade
5.9%inclusion4 decks68 decks
-1%synergy
Sorceries
Phyresis Outbreak
46%inclusion31 decks68 decks
44%synergy
Feed the Swarm
31%inclusion21 decks68 decks
-20%synergy
Revenge of the Rats
28%inclusion19 decks68 decks
25%synergy
Diabolic Intent
24%inclusion16 decks68 decks
9%synergy
Toxic Deluge
24%inclusion16 decks68 decks
-13%synergy
Bloodline Bidding
23%inclusion7 decks31 decks
18%synergy
Kindred Dominance
22%inclusion15 decks68 decks
17%synergy
Reanimate
21%inclusion14 decks68 decks
-19%synergy
Sign in Blood
21%inclusion14 decks68 decks
-15%synergy
Patriarch's Bidding
19%inclusion13 decks68 decks
15%synergy
Vat Emergence
18%inclusion12 decks68 decks
16%synergy
Diabolic Tutor
18%inclusion12 decks68 decks
3%synergy
Damnation
16%inclusion11 decks68 decks
-4%synergy
Grim Tutor
16%inclusion11 decks68 decks
5%synergy
Plague of Vermin
16%inclusion11 decks68 decks
14%synergy
Night's Whisper
16%inclusion11 decks68 decks
-8%synergy
Swarmyard Massacre
15%inclusion10 decks68 decks
12%synergy
Spread the Sickness
13%inclusion9 decks68 decks
13%synergy
Read the Bones
13%inclusion9 decks68 decks
-4%synergy
Crippling Fear
12%inclusion8 decks68 decks
9%synergy
Torment of Hailfire
10%inclusion7 decks68 decks
-5%synergy
Echoing Return
10%inclusion7 decks68 decks
7%synergy
Caress of Phyrexia
10%inclusion7 decks68 decks
10%synergy
Victimize
8.8%inclusion6 decks68 decks
-18%synergy
Bubbling Muck
8.8%inclusion6 decks68 decks
-7%synergy
In Garruk's Wake
8.8%inclusion6 decks68 decks
5%synergy
Gruesome Fate
8.8%inclusion6 decks68 decks
7%synergy
Feed the Infection
7.4%inclusion5 decks68 decks
7%synergy
Unearth
7.4%inclusion5 decks68 decks
-1%synergy
Geth's Summons
7.4%inclusion5 decks68 decks
7%synergy
Profane Tutor
5.9%inclusion4 decks68 decks
2%synergy
Scheming Symmetry
5.9%inclusion4 decks68 decks
2%synergy
Living Death
5.9%inclusion4 decks68 decks
-4%synergy
Final Parting
5.9%inclusion4 decks68 decks
1%synergy
Exsanguinate
5.9%inclusion4 decks68 decks
-19%synergy
Buried Alive
5.9%inclusion4 decks68 decks
-6%synergy
Insatiable Avarice
5.9%inclusion4 decks68 decks
-6%synergy
Utility Artifacts
Herald's Horn
46%inclusion31 decks68 decks
40%synergy
Skullclamp
34%inclusion23 decks68 decks
12%synergy
Thrumming Stone
31%inclusion21 decks68 decks
27%synergy
Lightning Greaves
31%inclusion21 decks68 decks
-3%synergy
Vanquisher's Banner
29%inclusion20 decks68 decks
25%synergy
Thornbite Staff
29%inclusion20 decks68 decks
27%synergy
Swiftfoot Boots
28%inclusion19 decks68 decks
-3%synergy
Contagion Engine
26%inclusion18 decks68 decks
25%synergy
Chronicle of Victory
26%inclusion8 decks31 decks
23%synergy
Contagion Clasp
25%inclusion17 decks68 decks
23%synergy
Coat of Arms
24%inclusion16 decks68 decks
21%synergy
Door of Destinies
21%inclusion14 decks68 decks
18%synergy
Ashnod's Altar
15%inclusion10 decks68 decks
-5%synergy
Whip of Erebos
12%inclusion8 decks68 decks
1%synergy
Eldrazi Monument
12%inclusion8 decks68 decks
10%synergy
Banner of Kinship
10%inclusion7 decks68 decks
8%synergy
Sensei's Divining Top
8.8%inclusion6 decks68 decks
1%synergy
Grafted Exoskeleton
8.8%inclusion6 decks68 decks
8%synergy
The Darkness Crystal
7.4%inclusion4 decks54 decks
-13%synergy
Akroma's Memorial
7.4%inclusion5 decks68 decks
6%synergy
Wayfarer's Bauble
5.9%inclusion4 decks68 decks
-9%synergy
Aetherflux Reservoir
5.9%inclusion4 decks68 decks
-4%synergy
Prosthetic Injector
5.9%inclusion4 decks68 decks
6%synergy
Sword of Truth and Justice
5.9%inclusion4 decks68 decks
5%synergy
Wishclaw Talisman
5.9%inclusion4 decks68 decks
-1%synergy
Enchantments
Cover of Darkness
35%inclusion24 decks68 decks
32%synergy
Grave Pact
31%inclusion21 decks68 decks
11%synergy
Necrogen Communion
31%inclusion21 decks68 decks
29%synergy
Contamination
28%inclusion19 decks68 decks
25%synergy
Black Market
22%inclusion15 decks68 decks
1%synergy
Phyresis
21%inclusion14 decks68 decks
18%synergy
Black Market Connections
21%inclusion14 decks68 decks
-3%synergy
Oversold Cemetery
21%inclusion14 decks68 decks
15%synergy
Bad Moon
16%inclusion11 decks68 decks
13%synergy
Haunted One
15%inclusion10 decks68 decks
12%synergy
The Meathook Massacre
13%inclusion9 decks68 decks
-4%synergy
Dictate of Erebos
10%inclusion7 decks68 decks
-1%synergy
Animate Dead
10%inclusion7 decks68 decks
-7%synergy
Sanguine Bond
8.8%inclusion6 decks68 decks
-3%synergy
Exquisite Blood
8.8%inclusion6 decks68 decks
-4%synergy
Greed
7.4%inclusion5 decks68 decks
1%synergy
Vampiric Rites
7.4%inclusion5 decks68 decks
1%synergy
Lord Skitter's Blessing
7.4%inclusion5 decks68 decks
7%synergy
Tribute to Horobi
7.4%inclusion5 decks68 decks
6%synergy
No Mercy
7.4%inclusion5 decks68 decks
0%synergy
Phyrexian Reclamation
5.9%inclusion4 decks68 decks
-4%synergy
Planeswalkers
Vraska, Betrayal's Sting
37%inclusion25 decks68 decks
34%synergy
Liliana of the Dark Realms
18%inclusion12 decks68 decks
4%synergy
Utility Lands
Cabal Coffers
71%inclusion48 decks68 decks
16%synergy
Bojuka Bog
65%inclusion44 decks68 decks
18%synergy
Urborg, Tomb of Yawgmoth
46%inclusion31 decks68 decks
8%synergy
Karn's Bastion
40%inclusion27 decks68 decks
36%synergy
Cabal Stronghold
34%inclusion23 decks68 decks
-1%synergy
Mudflat Village
32%inclusion22 decks68 decks
30%synergy
Phyrexian Tower
25%inclusion17 decks68 decks
0%synergy
Witch's Cottage
25%inclusion17 decks68 decks
0%synergy
Reliquary Tower
25%inclusion17 decks68 decks
-5%synergy
Mortuary Mire
24%inclusion16 decks68 decks
10%synergy
Nykthos, Shrine to Nyx
22%inclusion15 decks68 decks
-8%synergy
Rogue's Passage
22%inclusion15 decks68 decks
3%synergy
Three Tree City
19%inclusion13 decks68 decks
14%synergy
Castle Locthwain
15%inclusion10 decks68 decks
-2%synergy
Crypt of Agadeem
12%inclusion8 decks68 decks
0%synergy
Volrath's Stronghold
12%inclusion8 decks68 decks
8%synergy
Shizo, Death's Storehouse
10%inclusion7 decks68 decks
0%synergy
War Room
8.8%inclusion6 decks68 decks
-7%synergy
Takenuma, Abandoned Mire
8.8%inclusion6 decks68 decks
-7%synergy
Secret Tunnel
8.3%inclusion3 decks36 decks
7%synergy
Inkmoth Nexus
7.4%inclusion5 decks68 decks
6%synergy
Buried Ruin
5.9%inclusion4 decks68 decks
1%synergy
Temple of the False God
5.9%inclusion4 decks68 decks
-2%synergy
Access Tunnel
5.9%inclusion4 decks68 decks
3%synergy
Mana Artifacts
Sol Ring
88%inclusion60 decks68 decks
2%synergy
Arcane Signet
41%inclusion28 decks68 decks
-21%synergy
Glistening Sphere
32%inclusion22 decks68 decks
31%synergy
Staff of Compleation
26%inclusion18 decks68 decks
25%synergy
Patchwork Banner
15%inclusion10 decks68 decks
10%synergy
Mind Stone
13%inclusion9 decks68 decks
-16%synergy
Thought Vessel
12%inclusion8 decks68 decks
-14%synergy
Caged Sun
8.8%inclusion6 decks68 decks
-2%synergy
Everflowing Chalice
7.4%inclusion5 decks68 decks
2%synergy
The Soul Stone
6.8%inclusion3 decks44 decks
-8%synergy
Charcoal Diamond
5.9%inclusion4 decks68 decks
-16%synergy
Lotus Petal
5.9%inclusion4 decks68 decks
-1%synergy
Throne of Eldraine
5.9%inclusion4 decks68 decks
-4%synergy
Mox Diamond
5.9%inclusion4 decks68 decks
2%synergy
Lands
Swamp
94%inclusion64 decks68 decks
-1%synergy
Cavern of Souls
24%inclusion16 decks68 decks
17%synergy
Path of Ancestry
18%inclusion12 decks68 decks
12%synergy
Myriad Landscape
16%inclusion11 decks68 decks
-9%synergy
Command Tower
12%inclusion8 decks68 decks
6%synergy
Malakir Rebirth
12%inclusion8 decks68 decks
-11%synergy
Big Apple, 3 a.m.
10%inclusion2 decks21 decks
8%synergy
Fell the Profane
5.9%inclusion4 decks68 decks
-13%synergy
Evolving Wilds
5.9%inclusion4 decks68 decks
2%synergy
Snow-Covered Swamp
5.9%inclusion4 decks68 decks
-1%synergy
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