Karumonix, the Rat King (Commander) - Proliferate

Karumonix, the Rat King
Rank #385
43decks
As CommanderAs CardAverage DeckDecks
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Budget
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Background image for Building Rat Typal With Marrow-Gnawer
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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Rat King, Verminister
28%inclusion5 decks18 decks
25%synergy
Rat King, Pale Piper
24%inclusion4 decks17 decks
19%synergy
Splinter's Technique
11%inclusion2 decks18 decks
9%synergy
Splinter, the Mentor
8.0%inclusion2 decks25 decks
7%synergy
Tunnel Rats
6.3%inclusion1 decks16 decks
6%synergy
High Synergy Cards
Blightbelly Rat
95%inclusion41 decks43 decks
92%synergy
Infectious Inquiry
84%inclusion36 decks43 decks
81%synergy
Ichor Rats
81%inclusion35 decks43 decks
78%synergy
Drown in Ichor
81%inclusion35 decks43 decks
78%synergy
Marrow-Gnawer
77%inclusion33 decks43 decks
73%synergy
Vraska's Fall
77%inclusion33 decks43 decks
73%synergy
Pack Rat
79%inclusion34 decks43 decks
73%synergy
Piper of the Swarm
79%inclusion34 decks43 decks
72%synergy
Whisper of the Dross
72%inclusion31 decks43 decks
69%synergy
Swarmyard
74%inclusion32 decks43 decks
69%synergy
Top Cards
Ogre Slumlord
77%inclusion33 decks43 decks
67%synergy
Crypt Rats
72%inclusion31 decks43 decks
67%synergy
Typhoid Rats
72%inclusion31 decks43 decks
68%synergy
Lord Skitter, Sewer King
72%inclusion31 decks43 decks
64%synergy
Dark Ritual
70%inclusion30 decks43 decks
3%synergy
Rancid Rats
70%inclusion30 decks43 decks
67%synergy
Tangled Colony
67%inclusion29 decks43 decks
64%synergy
Lord Skitter's Butcher
65%inclusion28 decks43 decks
62%synergy
Phyresis Outbreak
58%inclusion25 decks43 decks
56%synergy
Rat Colony
58%inclusion25 decks43 decks
53%synergy
Game Changers
Demonic Tutor
12%inclusion5 decks43 decks
-16%synergy
Vampiric Tutor
9.3%inclusion4 decks43 decks
-12%synergy
Bolas's Citadel
7.0%inclusion3 decks43 decks
-22%synergy
Creatures
Septic Rats
56%inclusion24 decks43 decks
54%synergy
Voracious Vermin
53%inclusion23 decks43 decks
50%synergy
Burglar Rat
51%inclusion22 decks43 decks
40%synergy
Stronghold Rats
51%inclusion22 decks43 decks
47%synergy
Persistent Marshstalker
49%inclusion20 decks41 decks
46%synergy
Gnat Miser
44%inclusion19 decks43 decks
41%synergy
Engine Rat
39%inclusion15 decks38 decks
38%synergy
Chittering Skitterling
37%inclusion16 decks43 decks
36%synergy
Ashcoat of the Shadow Swarm
37%inclusion16 decks43 decks
34%synergy
Ratcatcher
37%inclusion16 decks43 decks
34%synergy
Ravenous Rats
35%inclusion15 decks43 decks
33%synergy
Swarm of Rats
35%inclusion15 decks43 decks
32%synergy
Pestilence Rats
35%inclusion15 decks43 decks
33%synergy
Wave of Rats
35%inclusion15 decks43 decks
33%synergy
Chittering Witch
33%inclusion14 decks43 decks
28%synergy
Nezumi Prowler
33%inclusion14 decks43 decks
31%synergy
Ink-Eyes, Servant of Oni
30%inclusion13 decks43 decks
27%synergy
Changeling Outcast
30%inclusion13 decks43 decks
25%synergy
Nashi, Moon Sage's Scion
30%inclusion13 decks43 decks
26%synergy
Ruin Rat
30%inclusion13 decks43 decks
29%synergy
Innocuous Rat
26%inclusion10 decks39 decks
25%synergy
Old Flitterfang
26%inclusion11 decks43 decks
24%synergy
Throat Slitter
23%inclusion10 decks43 decks
21%synergy
Drainpipe Vermin
21%inclusion9 decks43 decks
20%synergy
Undercity Dire Rat
19%inclusion7 decks36 decks
18%synergy
Gnawing Vermin
19%inclusion8 decks43 decks
17%synergy
Mukotai Ambusher
19%inclusion8 decks43 decks
18%synergy
Nezumi Bladeblesser
19%inclusion8 decks43 decks
18%synergy
Razortooth Rats
19%inclusion8 decks43 decks
18%synergy
Nezumi Cutthroat
19%inclusion8 decks43 decks
18%synergy
Elephant-Rat
17%inclusion5 decks30 decks
16%synergy
Nezumi Graverobber
16%inclusion7 decks43 decks
15%synergy
Ruthless Radrat
16%inclusion7 decks43 decks
15%synergy
Ayara, First of Locthwain
16%inclusion7 decks43 decks
-9%synergy
Skullsnatcher
16%inclusion7 decks43 decks
16%synergy
Thornplate Intimidator
15%inclusion6 decks41 decks
14%synergy
Filth
14%inclusion6 decks43 decks
12%synergy
Scrib Nibblers
14%inclusion6 decks43 decks
13%synergy
Species Specialist
14%inclusion6 decks43 decks
10%synergy
Zodiac Rat
14%inclusion6 decks43 decks
14%synergy
Locust Miser
14%inclusion6 decks43 decks
12%synergy
Yawgmoth, Thran Physician
14%inclusion6 decks43 decks
4%synergy
Nezumi Informant
14%inclusion6 decks43 decks
7%synergy
Daggerfang Duo
12%inclusion5 decks41 decks
11%synergy
Valley Rotcaller
12%inclusion5 decks41 decks
10%synergy
Chittering Rats
12%inclusion5 decks43 decks
11%synergy
Gray Merchant of Asphodel
12%inclusion5 decks43 decks
-39%synergy
Sinuous Vermin
12%inclusion5 decks43 decks
11%synergy
Twisted Sewer-Witch
12%inclusion5 decks43 decks
10%synergy
Crypt Ghast
12%inclusion5 decks43 decks
-36%synergy
Instants
Grim Affliction
47%inclusion20 decks43 decks
45%synergy
Village Rites
33%inclusion14 decks43 decks
7%synergy
Defile
33%inclusion14 decks43 decks
-4%synergy
Rat Out
26%inclusion11 decks43 decks
24%synergy
Tainted Strike
26%inclusion11 decks43 decks
23%synergy
Go for the Throat
23%inclusion10 decks43 decks
0%synergy
Fell the Profane
21%inclusion9 decks42 decks
3%synergy
Deadly Dispute
21%inclusion9 decks43 decks
-5%synergy
Murder
21%inclusion9 decks43 decks
11%synergy
Tragic Slip
21%inclusion9 decks43 decks
1%synergy
Corrupted Conviction
19%inclusion8 decks43 decks
6%synergy
Anoint with Affliction
16%inclusion7 decks43 decks
16%synergy
Virulent Wound
14%inclusion6 decks43 decks
13%synergy
Withering Torment
13%inclusion5 decks39 decks
-19%synergy
Doom Blade
12%inclusion5 decks43 decks
4%synergy
Infernal Grasp
12%inclusion5 decks43 decks
-14%synergy
Undying Malice
9.3%inclusion4 decks43 decks
-1%synergy
Malakir Rebirth
9.3%inclusion4 decks43 decks
-14%synergy
Offer Immortality
9.3%inclusion4 decks43 decks
7%synergy
Consuming Corruption
7.1%inclusion3 decks42 decks
-8%synergy
Hagra Mauling
7.0%inclusion3 decks43 decks
3%synergy
Not Dead After All
7.0%inclusion3 decks43 decks
-4%synergy
Songs of the Damned
7.0%inclusion3 decks43 decks
2%synergy
Darkness
7.0%inclusion3 decks43 decks
-3%synergy
Foul-Tongue Shriek
7.0%inclusion3 decks43 decks
5%synergy
Feign Death
7.0%inclusion3 decks43 decks
-1%synergy
Swift Demise
5.9%inclusion1 decks17 decks
5%synergy
Sorceries
Vat Emergence
40%inclusion17 decks43 decks
38%synergy
Sign in Blood
35%inclusion15 decks43 decks
-1%synergy
Feed the Swarm
33%inclusion14 decks43 decks
-18%synergy
Revenge of the Rats
31%inclusion12 decks39 decks
28%synergy
Crippling Fear
30%inclusion13 decks43 decks
27%synergy
Spread the Sickness
26%inclusion11 decks43 decks
25%synergy
Kindred Dominance
23%inclusion10 decks43 decks
19%synergy
Swarmyard Massacre
22%inclusion9 decks41 decks
20%synergy
Patriarch's Bidding
21%inclusion9 decks43 decks
17%synergy
Feed the Infection
21%inclusion9 decks43 decks
20%synergy
Read the Bones
21%inclusion9 decks43 decks
4%synergy
Night's Whisper
19%inclusion8 decks43 decks
-6%synergy
Lab Rats
19%inclusion8 decks43 decks
18%synergy
Bloodline Bidding
16%inclusion3 decks19 decks
11%synergy
Psychic Whorl
15%inclusion6 decks41 decks
14%synergy
Plague of Vermin
14%inclusion6 decks43 decks
12%synergy
Victimize
12%inclusion5 decks43 decks
-15%synergy
Unearth
12%inclusion5 decks43 decks
3%synergy
Caress of Phyrexia
12%inclusion5 decks43 decks
11%synergy
Toxic Deluge
12%inclusion5 decks43 decks
-25%synergy
Diabolic Tutor
9.3%inclusion4 decks43 decks
-5%synergy
Bubbling Muck
9.3%inclusion4 decks43 decks
-6%synergy
Geth's Summons
9.3%inclusion4 decks43 decks
9%synergy
Fell
7.3%inclusion3 decks41 decks
4%synergy
Diabolic Intent
7.0%inclusion3 decks43 decks
-8%synergy
Predators' Hour
7.0%inclusion3 decks43 decks
6%synergy
Echoing Return
7.0%inclusion3 decks43 decks
4%synergy
Mutilate
7.0%inclusion3 decks43 decks
-10%synergy
Decree of Pain
7.0%inclusion3 decks43 decks
2%synergy
Reanimate
7.0%inclusion3 decks43 decks
-33%synergy
In Garruk's Wake
7.0%inclusion3 decks43 decks
3%synergy
Insatiable Avarice
7.0%inclusion3 decks43 decks
-5%synergy
Dirge of Dread
7.0%inclusion3 decks43 decks
7%synergy
Gruesome Fate
7.0%inclusion3 decks43 decks
5%synergy
Eaten Alive
7.0%inclusion3 decks43 decks
3%synergy
Final Vengeance
5.1%inclusion2 decks39 decks
3%synergy
Utility Artifacts
Jet Medallion
53%inclusion23 decks43 decks
-8%synergy
Bontu's Monument
51%inclusion22 decks43 decks
23%synergy
Contagion Clasp
49%inclusion21 decks43 decks
47%synergy
Herald's Horn
37%inclusion16 decks43 decks
31%synergy
Contagion Engine
33%inclusion14 decks43 decks
31%synergy
Skullclamp
30%inclusion13 decks43 decks
8%synergy
Swiftfoot Boots
28%inclusion12 decks43 decks
-4%synergy
Lightning Greaves
16%inclusion7 decks43 decks
-17%synergy
Icon of Ancestry
14%inclusion6 decks43 decks
13%synergy
Vanquisher's Banner
14%inclusion6 decks43 decks
10%synergy
Whip of Erebos
12%inclusion5 decks43 decks
1%synergy
Prosthetic Injector
12%inclusion5 decks43 decks
11%synergy
Grafted Exoskeleton
12%inclusion5 decks43 decks
11%synergy
Banner of Kinship
10%inclusion4 decks39 decks
8%synergy
Coat of Arms
9.3%inclusion4 decks43 decks
7%synergy
Whispersilk Cloak
9.3%inclusion4 decks43 decks
3%synergy
Eldrazi Monument
9.3%inclusion4 decks43 decks
8%synergy
The Darkness Crystal
8.3%inclusion3 decks36 decks
-12%synergy
Ashnod's Altar
7.0%inclusion3 decks43 decks
-13%synergy
Throne of Geth
7.0%inclusion3 decks43 decks
7%synergy
Sword of Truth and Justice
7.0%inclusion3 decks43 decks
6%synergy
Expedition Map
7.0%inclusion3 decks43 decks
-5%synergy
Door of Destinies
7.0%inclusion3 decks43 decks
5%synergy
Blade of Selves
7.0%inclusion3 decks43 decks
6%synergy
Thrumming Stone
7.0%inclusion3 decks43 decks
3%synergy
Thornbite Staff
7.0%inclusion3 decks43 decks
4%synergy
Obelisk of Urd
7.0%inclusion3 decks43 decks
6%synergy
Chronicle of Victory
5.3%inclusion1 decks19 decks
2%synergy
Gathering Stone
5.3%inclusion1 decks19 decks
4%synergy
Enchantments
Necrogen Communion
53%inclusion23 decks43 decks
52%synergy
Cover of Darkness
49%inclusion21 decks43 decks
46%synergy
Phyrexian Arena
30%inclusion13 decks43 decks
-10%synergy
Phyresis
28%inclusion12 decks43 decks
26%synergy
Bad Moon
26%inclusion11 decks43 decks
22%synergy
Oversold Cemetery
23%inclusion10 decks43 decks
18%synergy
Haunted One
19%inclusion8 decks43 decks
16%synergy
Grave Pact
16%inclusion7 decks43 decks
-3%synergy
Glistening Oil
14%inclusion6 decks43 decks
13%synergy
Tribute to Horobi
14%inclusion6 decks43 decks
13%synergy
Black Market Connections
14%inclusion6 decks43 decks
-10%synergy
Black Market
12%inclusion5 decks43 decks
-9%synergy
Lord Skitter's Blessing
12%inclusion5 decks43 decks
11%synergy
Intimidation
9.3%inclusion4 decks43 decks
9%synergy
Dark Prophecy
9.3%inclusion4 decks43 decks
5%synergy
Phyrexian Reclamation
7.0%inclusion3 decks43 decks
-3%synergy
Relic Putrescence
7.0%inclusion3 decks43 decks
7%synergy
Ninja Teen
5.6%inclusion1 decks18 decks
4%synergy
Planeswalkers
Vraska, Betrayal's Sting
51%inclusion22 decks43 decks
49%synergy
Liliana of the Dark Realms
14%inclusion6 decks43 decks
0%synergy
Utility Lands
Karn's Bastion
70%inclusion30 decks43 decks
66%synergy
Bojuka Bog
56%inclusion24 decks43 decks
9%synergy
Witch's Cottage
47%inclusion20 decks43 decks
22%synergy
Cabal Coffers
44%inclusion19 decks43 decks
-11%synergy
Mudflat Village
41%inclusion17 decks41 decks
39%synergy
Rogue's Passage
40%inclusion17 decks43 decks
20%synergy
Cabal Stronghold
35%inclusion15 decks43 decks
0%synergy
Reliquary Tower
30%inclusion13 decks43 decks
0%synergy
Urborg, Tomb of Yawgmoth
26%inclusion11 decks43 decks
-12%synergy
Access Tunnel
26%inclusion11 decks43 decks
23%synergy
Mortuary Mire
23%inclusion10 decks43 decks
10%synergy
Crypt of Agadeem
23%inclusion10 decks43 decks
12%synergy
Nykthos, Shrine to Nyx
23%inclusion10 decks43 decks
-7%synergy
Three Tree City
22%inclusion9 decks41 decks
17%synergy
Phyrexian Tower
19%inclusion8 decks43 decks
-7%synergy
Barren Moor
16%inclusion7 decks43 decks
6%synergy
Castle Locthwain
14%inclusion6 decks43 decks
-3%synergy
Temple of the False God
12%inclusion5 decks43 decks
4%synergy
War Room
9.3%inclusion4 decks43 decks
-7%synergy
Command Beacon
9.3%inclusion4 decks43 decks
1%synergy
The Dross Pits
9.3%inclusion4 decks43 decks
8%synergy
Peat Bog
9.3%inclusion4 decks43 decks
7%synergy
Secret Tunnel
8.3%inclusion2 decks24 decks
7%synergy
Shizo, Death's Storehouse
7.0%inclusion3 decks43 decks
-3%synergy
Vault of Whispers
7.0%inclusion3 decks43 decks
2%synergy
Memorial to Folly
7.0%inclusion3 decks43 decks
4%synergy
Takenuma, Abandoned Mire
7.0%inclusion3 decks43 decks
-9%synergy
Everglades
7.0%inclusion3 decks43 decks
6%synergy
Mana Artifacts
Sol Ring
84%inclusion36 decks43 decks
-2%synergy
Glistening Sphere
58%inclusion25 decks43 decks
57%synergy
Arcane Signet
42%inclusion18 decks43 decks
-20%synergy
Staff of Compleation
40%inclusion17 decks43 decks
38%synergy
Charcoal Diamond
26%inclusion11 decks43 decks
3%synergy
Patchwork Banner
22%inclusion9 decks41 decks
18%synergy
Mind Stone
19%inclusion8 decks43 decks
-11%synergy
Phyrexian Atlas
16%inclusion7 decks43 decks
16%synergy
Commander's Sphere
12%inclusion5 decks43 decks
3%synergy
Everflowing Chalice
7.0%inclusion3 decks43 decks
1%synergy
Heraldic Banner
7.0%inclusion3 decks43 decks
2%synergy
Thought Vessel
7.0%inclusion3 decks43 decks
-19%synergy
Lands
Swamp
100%inclusion43 decks43 decks
5%synergy
Path of Ancestry
49%inclusion21 decks43 decks
44%synergy
Myriad Landscape
23%inclusion10 decks43 decks
-2%synergy
Fell the Profane
21%inclusion9 decks42 decks
3%synergy
Escape Tunnel
16%inclusion7 decks43 decks
15%synergy
Cavern of Souls
16%inclusion7 decks43 decks
10%synergy
Urza's Cave
12%inclusion5 decks42 decks
4%synergy
Command Tower
12%inclusion5 decks43 decks
6%synergy
Malakir Rebirth
9.3%inclusion4 decks43 decks
-14%synergy
Hagra Mauling
7.0%inclusion3 decks43 decks
3%synergy
Ash Barrens
7.0%inclusion3 decks43 decks
6%synergy
Evolving Wilds
7.0%inclusion3 decks43 decks
3%synergy
Big Apple, 3 a.m.
5.9%inclusion1 decks17 decks
4%synergy
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