Karumonix, the Rat King (Commander) - Expensive Core

Karumonix, the Rat King
Rank #381
93decks
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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Utility Lands
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Decorum Dissertation
10%inclusion1 decks10 decks
5%synergy
Emeritus of Woe
10%inclusion1 decks10 decks
3%synergy
High Synergy Cards
Marrow-Gnawer
91%inclusion85 decks93 decks
88%synergy
Piper of the Swarm
88%inclusion82 decks93 decks
81%synergy
Swarmyard
81%inclusion75 decks93 decks
75%synergy
Pack Rat
74%inclusion69 decks93 decks
68%synergy
Ashcoat of the Shadow Swarm
71%inclusion66 decks93 decks
68%synergy
Ogre Slumlord
75%inclusion70 decks93 decks
65%synergy
Lord Skitter, Sewer King
71%inclusion66 decks93 decks
63%synergy
Blightbelly Rat
63%inclusion59 decks93 decks
60%synergy
Ichor Rats
59%inclusion55 decks93 decks
56%synergy
Rat Colony
60%inclusion56 decks93 decks
55%synergy
Top Cards
Jet Medallion
89%inclusion83 decks93 decks
27%synergy
Bontu's Monument
67%inclusion62 decks93 decks
38%synergy
Herald's Horn
57%inclusion53 decks93 decks
51%synergy
Dark Ritual
56%inclusion52 decks93 decks
-11%synergy
Vraska's Fall
55%inclusion51 decks93 decks
51%synergy
Phyresis Outbreak
55%inclusion51 decks93 decks
53%synergy
Skullclamp
54%inclusion50 decks93 decks
32%synergy
Cover of Darkness
53%inclusion49 decks93 decks
50%synergy
Lord Skitter's Butcher
51%inclusion47 decks93 decks
47%synergy
Infectious Inquiry
49%inclusion46 decks93 decks
47%synergy
Game Changers
Demonic Tutor
5.4%inclusion5 decks93 decks
-22%synergy
Creatures
Ratcatcher
47%inclusion44 decks93 decks
44%synergy
Crypt Rats
43%inclusion40 decks93 decks
38%synergy
Tangled Colony
43%inclusion40 decks93 decks
40%synergy
Rat King, Pale Piper
42%inclusion11 decks26 decks
38%synergy
Species Specialist
41%inclusion38 decks93 decks
37%synergy
Septic Rats
39%inclusion36 decks93 decks
37%synergy
Ayara, First of Locthwain
38%inclusion35 decks93 decks
12%synergy
Persistent Marshstalker
36%inclusion31 decks85 decks
33%synergy
Ink-Eyes, Servant of Oni
35%inclusion33 decks93 decks
32%synergy
Rat King, Verminister
34%inclusion10 decks29 decks
31%synergy
Typhoid Rats
34%inclusion32 decks93 decks
31%synergy
Crypt Ghast
34%inclusion32 decks93 decks
-13%synergy
Voracious Vermin
33%inclusion31 decks93 decks
30%synergy
Burglar Rat
31%inclusion29 decks93 decks
20%synergy
Gnat Miser
31%inclusion29 decks93 decks
28%synergy
Rancid Rats
29%inclusion27 decks93 decks
27%synergy
Changeling Outcast
28%inclusion26 decks93 decks
23%synergy
Nashi, Moon Sage's Scion
26%inclusion24 decks93 decks
22%synergy
Stronghold Rats
25%inclusion23 decks93 decks
21%synergy
Relentless Rats
24%inclusion22 decks93 decks
22%synergy
Wave of Rats
23%inclusion21 decks93 decks
21%synergy
Yawgmoth, Thran Physician
22%inclusion20 decks93 decks
11%synergy
Engine Rat
21%inclusion13 decks63 decks
19%synergy
Valley Rotcaller
20%inclusion17 decks85 decks
17%synergy
Swarm of Rats
19%inclusion18 decks93 decks
17%synergy
Filth
18%inclusion17 decks93 decks
16%synergy
Chittering Skitterling
17%inclusion16 decks93 decks
16%synergy
Throat Slitter
17%inclusion16 decks93 decks
15%synergy
Undercity Dire Rat
15%inclusion8 decks52 decks
14%synergy
Roaming Throne
15%inclusion14 decks93 decks
12%synergy
Zodiac Rat
15%inclusion14 decks93 decks
15%synergy
Gray Merchant of Asphodel
15%inclusion14 decks93 decks
-36%synergy
Nezumi Informant
15%inclusion14 decks93 decks
8%synergy
Nezumi Graverobber
13%inclusion12 decks93 decks
11%synergy
Gnawing Vermin
13%inclusion12 decks93 decks
11%synergy
Nezumi Prowler
13%inclusion12 decks93 decks
11%synergy
Locust Miser
13%inclusion12 decks93 decks
11%synergy
Rotting Rats
12%inclusion11 decks93 decks
9%synergy
Twisted Sewer-Witch
12%inclusion11 decks93 decks
10%synergy
Chittering Witch
11%inclusion10 decks93 decks
6%synergy
Drainpipe Vermin
11%inclusion10 decks93 decks
9%synergy
Ruthless Radrat
10%inclusion9 decks93 decks
9%synergy
Pestilence Rats
10%inclusion9 decks93 decks
8%synergy
Nezumi Cutthroat
10%inclusion9 decks93 decks
9%synergy
Adaptive Automaton
8.6%inclusion8 decks93 decks
8%synergy
Old Flitterfang
8.6%inclusion8 decks93 decks
7%synergy
Mirkwood Bats
6.5%inclusion6 decks93 decks
-2%synergy
Zulaport Cutthroat
6.5%inclusion6 decks93 decks
-17%synergy
Refurbished Familiar
5.6%inclusion5 decks90 decks
3%synergy
Patron of the Nezumi
5.4%inclusion5 decks93 decks
5%synergy
Instants
Defile
33%inclusion31 decks93 decks
-3%synergy
Deadly Rollick
32%inclusion30 decks93 decks
8%synergy
Village Rites
31%inclusion29 decks93 decks
6%synergy
Whisper of the Dross
29%inclusion27 decks93 decks
26%synergy
Malakir Rebirth
28%inclusion26 decks93 decks
5%synergy
Fell the Profane
27%inclusion25 decks92 decks
8%synergy
Tainted Strike
24%inclusion22 decks93 decks
21%synergy
Go for the Throat
22%inclusion20 decks93 decks
-1%synergy
Withering Torment
21%inclusion16 decks75 decks
-10%synergy
Infernal Grasp
20%inclusion19 decks93 decks
-5%synergy
Deadly Dispute
19%inclusion18 decks93 decks
-7%synergy
Grim Affliction
19%inclusion18 decks93 decks
17%synergy
Anoint with Affliction
17%inclusion16 decks93 decks
17%synergy
Consuming Corruption
17%inclusion15 decks90 decks
1%synergy
Tragic Slip
14%inclusion13 decks93 decks
-6%synergy
Foul-Tongue Shriek
14%inclusion13 decks93 decks
12%synergy
Sudden Spoiling
13%inclusion12 decks93 decks
4%synergy
Rat Out
12%inclusion11 decks93 decks
10%synergy
Corrupted Conviction
12%inclusion11 decks93 decks
-1%synergy
Bitter Triumph
11%inclusion10 decks93 decks
1%synergy
Snuff Out
10%inclusion9 decks93 decks
-3%synergy
Feign Death
7.5%inclusion7 decks93 decks
-1%synergy
Darkness
7.5%inclusion7 decks93 decks
-2%synergy
Baleful Mastery
7.5%inclusion7 decks93 decks
-1%synergy
Gravepurge
7.5%inclusion7 decks93 decks
6%synergy
Hero's Downfall
6.5%inclusion6 decks93 decks
0%synergy
Imp's Mischief
6.5%inclusion6 decks93 decks
-18%synergy
Sheoldred's Edict
6.5%inclusion6 decks93 decks
-8%synergy
Hagra Mauling
5.4%inclusion5 decks93 decks
1%synergy
Not Dead After All
5.4%inclusion5 decks93 decks
-6%synergy
Virulent Wound
5.4%inclusion5 decks93 decks
5%synergy
Offer Immortality
5.4%inclusion5 decks93 decks
3%synergy
Sorceries
Feed the Swarm
47%inclusion44 decks93 decks
-3%synergy
Drown in Ichor
43%inclusion40 decks93 decks
39%synergy
Kindred Dominance
43%inclusion40 decks93 decks
38%synergy
Swarmyard Massacre
39%inclusion32 decks83 decks
36%synergy
Patriarch's Bidding
38%inclusion35 decks93 decks
33%synergy
Sign in Blood
31%inclusion29 decks93 decks
-4%synergy
Toxic Deluge
28%inclusion26 decks93 decks
-9%synergy
Bloodline Bidding
27%inclusion8 decks30 decks
22%synergy
Echoing Return
24%inclusion22 decks93 decks
21%synergy
Crippling Fear
23%inclusion21 decks93 decks
20%synergy
Night's Whisper
22%inclusion20 decks93 decks
-3%synergy
Damnation
22%inclusion20 decks93 decks
1%synergy
Plague of Vermin
20%inclusion19 decks93 decks
18%synergy
Diabolic Intent
15%inclusion14 decks93 decks
0%synergy
Pact of the Serpent
15%inclusion14 decks93 decks
13%synergy
Revenge of the Rats
14%inclusion10 decks70 decks
11%synergy
Reanimate
14%inclusion13 decks93 decks
-26%synergy
Vat Emergence
12%inclusion11 decks93 decks
10%synergy
Unearth
12%inclusion11 decks93 decks
3%synergy
Agadeem's Awakening
12%inclusion11 decks93 decks
5%synergy
Haunting Voyage
11%inclusion10 decks93 decks
10%synergy
Insatiable Avarice
11%inclusion10 decks93 decks
-1%synergy
Read the Bones
10%inclusion9 decks93 decks
-7%synergy
Exsanguinate
10%inclusion9 decks93 decks
-15%synergy
Diabolic Tutor
6.5%inclusion6 decks93 decks
-8%synergy
Forever Young
6.5%inclusion6 decks93 decks
5%synergy
Feed the Infection
6.5%inclusion6 decks93 decks
6%synergy
Mutilate
6.5%inclusion6 decks93 decks
-10%synergy
Geth's Summons
6.5%inclusion6 decks93 decks
6%synergy
Torment of Hailfire
5.4%inclusion5 decks93 decks
-10%synergy
Living Death
5.4%inclusion5 decks93 decks
-5%synergy
Grim Tutor
5.4%inclusion5 decks93 decks
-6%synergy
In Garruk's Wake
5.4%inclusion5 decks93 decks
1%synergy
Syphon Mind
5.4%inclusion5 decks93 decks
-7%synergy
Utility Artifacts
Thrumming Stone
46%inclusion43 decks93 decks
42%synergy
Vanquisher's Banner
43%inclusion40 decks93 decks
39%synergy
Contagion Engine
31%inclusion29 decks93 decks
29%synergy
Chronicle of Victory
27%inclusion8 decks30 decks
24%synergy
Whip of Erebos
26%inclusion24 decks93 decks
15%synergy
Lightning Greaves
25%inclusion23 decks93 decks
-9%synergy
Door of Destinies
24%inclusion22 decks93 decks
21%synergy
Coat of Arms
22%inclusion20 decks93 decks
19%synergy
Contagion Clasp
20%inclusion19 decks93 decks
18%synergy
Eldrazi Monument
17%inclusion16 decks93 decks
16%synergy
Banner of Kinship
14%inclusion10 decks70 decks
12%synergy
Swiftfoot Boots
13%inclusion12 decks93 decks
-18%synergy
Akroma's Memorial
11%inclusion10 decks93 decks
10%synergy
Ashnod's Altar
11%inclusion10 decks93 decks
-9%synergy
Sword of Truth and Justice
10%inclusion9 decks93 decks
9%synergy
The Darkness Crystal
10%inclusion5 decks52 decks
-10%synergy
Wayfarer's Bauble
8.6%inclusion8 decks93 decks
-7%synergy
Expedition Map
7.5%inclusion7 decks93 decks
-4%synergy
Grafted Exoskeleton
7.5%inclusion7 decks93 decks
6%synergy
Gathering Stone
6.7%inclusion2 decks30 decks
5%synergy
Urza's Incubator
6.5%inclusion6 decks93 decks
4%synergy
Sword of Hearth and Home
5.4%inclusion5 decks93 decks
4%synergy
Obelisk of Urd
5.4%inclusion5 decks93 decks
5%synergy
Enchantments
Phyrexian Arena
49%inclusion46 decks93 decks
10%synergy
Black Market Connections
41%inclusion38 decks93 decks
17%synergy
Haunted One
30%inclusion28 decks93 decks
27%synergy
Grave Pact
26%inclusion24 decks93 decks
6%synergy
Necrogen Communion
22%inclusion20 decks93 decks
20%synergy
Black Market
17%inclusion16 decks93 decks
-4%synergy
Oversold Cemetery
17%inclusion16 decks93 decks
12%synergy
Phyresis
15%inclusion14 decks93 decks
13%synergy
Bad Moon
15%inclusion14 decks93 decks
12%synergy
The Meathook Massacre
13%inclusion12 decks93 decks
-4%synergy
Dictate of Erebos
13%inclusion12 decks93 decks
2%synergy
Vampiric Rites
10%inclusion9 decks93 decks
4%synergy
Dark Prophecy
10%inclusion9 decks93 decks
6%synergy
Glistening Oil
8.6%inclusion8 decks93 decks
8%synergy
Phyrexian Reclamation
7.5%inclusion7 decks93 decks
-2%synergy
Tribute to Horobi
6.5%inclusion6 decks93 decks
5%synergy
Planeswalkers
Vraska, Betrayal's Sting
34%inclusion32 decks93 decks
32%synergy
Liliana of the Dark Realms
17%inclusion16 decks93 decks
3%synergy
Utility Lands
Cabal Coffers
87%inclusion81 decks93 decks
32%synergy
Urborg, Tomb of Yawgmoth
80%inclusion74 decks93 decks
42%synergy
Nykthos, Shrine to Nyx
62%inclusion58 decks93 decks
33%synergy
Cabal Stronghold
55%inclusion51 decks93 decks
20%synergy
Karn's Bastion
49%inclusion46 decks93 decks
46%synergy
Three Tree City
47%inclusion40 decks85 decks
42%synergy
Bojuka Bog
45%inclusion42 decks93 decks
-2%synergy
Mudflat Village
38%inclusion32 decks85 decks
35%synergy
Phyrexian Tower
38%inclusion35 decks93 decks
12%synergy
Rogue's Passage
33%inclusion31 decks93 decks
14%synergy
Reliquary Tower
30%inclusion28 decks93 decks
0%synergy
Shizo, Death's Storehouse
29%inclusion27 decks93 decks
19%synergy
Takenuma, Abandoned Mire
26%inclusion24 decks93 decks
10%synergy
Crypt of Agadeem
25%inclusion23 decks93 decks
13%synergy
Castle Locthwain
22%inclusion20 decks93 decks
5%synergy
Witch's Cottage
19%inclusion18 decks93 decks
-5%synergy
War Room
18%inclusion17 decks93 decks
2%synergy
Mortuary Mire
17%inclusion16 decks93 decks
4%synergy
Minas Morgul, Dark Fortress
17%inclusion16 decks93 decks
14%synergy
Mutavault
15%inclusion14 decks93 decks
14%synergy
Secret Tunnel
13%inclusion5 decks40 decks
11%synergy
Midgar, City of Mako
12%inclusion6 decks52 decks
0%synergy
Susur Secundi, Void Altar
11%inclusion5 decks45 decks
4%synergy
Inkmoth Nexus
10%inclusion9 decks93 decks
9%synergy
Volrath's Stronghold
8.6%inclusion8 decks93 decks
5%synergy
Vesuva
7.5%inclusion7 decks93 decks
5%synergy
The Black Gate
6.5%inclusion6 decks93 decks
3%synergy
High Market
6.5%inclusion6 decks93 decks
-1%synergy
Temple of the False God
6.5%inclusion6 decks93 decks
-1%synergy
Access Tunnel
6.5%inclusion6 decks93 decks
3%synergy
Barren Moor
5.4%inclusion5 decks93 decks
-4%synergy
Deserted Temple
5.4%inclusion5 decks93 decks
1%synergy
Leechridden Swamp
5.4%inclusion5 decks93 decks
3%synergy
Mana Artifacts
Sol Ring
74%inclusion69 decks93 decks
-12%synergy
Glistening Sphere
48%inclusion45 decks93 decks
47%synergy
Arcane Signet
45%inclusion42 decks93 decks
-17%synergy
Patchwork Banner
33%inclusion28 decks85 decks
29%synergy
The Soul Stone
26%inclusion11 decks43 decks
11%synergy
Staff of Compleation
23%inclusion21 decks93 decks
21%synergy
Charcoal Diamond
13%inclusion12 decks93 decks
-9%synergy
Heraldic Banner
12%inclusion11 decks93 decks
6%synergy
Mind Stone
12%inclusion11 decks93 decks
-17%synergy
Gauntlet of Power
11%inclusion10 decks93 decks
7%synergy
Thought Vessel
11%inclusion10 decks93 decks
-15%synergy
Throne of Eldraine
11%inclusion10 decks93 decks
1%synergy
Caged Sun
10%inclusion9 decks93 decks
-2%synergy
Phyrexian Atlas
5.4%inclusion5 decks93 decks
5%synergy
Lands
Swamp
95%inclusion88 decks93 decks
-1%synergy
Cavern of Souls
48%inclusion45 decks93 decks
42%synergy
Path of Ancestry
38%inclusion35 decks93 decks
32%synergy
Malakir Rebirth
28%inclusion26 decks93 decks
5%synergy
Fell the Profane
27%inclusion25 decks92 decks
8%synergy
Myriad Landscape
19%inclusion18 decks93 decks
-6%synergy
Big Apple, 3 a.m.
15%inclusion4 decks26 decks
13%synergy
Urza's Cave
13%inclusion12 decks93 decks
5%synergy
Agadeem's Awakening
12%inclusion11 decks93 decks
5%synergy
Polluted Delta
10%inclusion9 decks93 decks
6%synergy
Verdant Catacombs
8.6%inclusion8 decks93 decks
5%synergy
Command Tower
7.5%inclusion7 decks93 decks
2%synergy
Snow-Covered Swamp
7.5%inclusion7 decks93 decks
1%synergy
Bloodstained Mire
7.5%inclusion7 decks93 decks
4%synergy
Marsh Flats
6.5%inclusion6 decks93 decks
3%synergy
Hagra Mauling
5.4%inclusion5 decks93 decks
1%synergy
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