Grenzo, Dungeon Warden (Commander) - Relentless Rats

Grenzo, Dungeon Warden
Rank #538
22decks
As CommanderAs CardAverage DeckDecks
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Ethan Coover
Apr 15, 2026
Ethan Coover
The Best X-Cost Spell Combos in Commander
With the Quandrix school of Strixhaven so focused on X spells, now seems like a good time to run through the top X spell combo cards.
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Utility Lands
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Relentless Rats
100%inclusion22 decks22 decks
100%synergy
Heartstone
68%inclusion15 decks22 decks
66%synergy
Thrumming Stone
59%inclusion13 decks22 decks
59%synergy
Marrow-Gnawer
55%inclusion12 decks22 decks
54%synergy
Piper of the Swarm
55%inclusion12 decks22 decks
54%synergy
The Cauldron of Eternity
50%inclusion11 decks22 decks
49%synergy
Crypt Ghast
50%inclusion11 decks22 decks
47%synergy
Crucible of Worlds
45%inclusion10 decks22 decks
45%synergy
Tomb Trawler
45%inclusion10 decks22 decks
45%synergy
Braid of Fire
45%inclusion10 decks22 decks
44%synergy
Top Cards
Gray Merchant of Asphodel
50%inclusion11 decks22 decks
39%synergy
Mana Echoes
36%inclusion8 decks22 decks
36%synergy
Palladium Myr
36%inclusion8 decks22 decks
35%synergy
Bedevil
36%inclusion8 decks22 decks
2%synergy
Lightning Greaves
36%inclusion8 decks22 decks
1%synergy
Patriarch's Bidding
32%inclusion7 decks22 decks
29%synergy
Bronze Walrus
32%inclusion7 decks22 decks
31%synergy
Terminate
32%inclusion7 decks22 decks
-8%synergy
Shared Animosity
32%inclusion7 decks22 decks
28%synergy
Anger
32%inclusion7 decks22 decks
19%synergy
Game Changers
Ancient Tomb
23%inclusion5 decks22 decks
13%synergy
Demonic Tutor
18%inclusion4 decks22 decks
0%synergy
Vampiric Tutor
9.1%inclusion2 decks22 decks
-5%synergy
Creatures
The Walls of Ba Sing Se
100%inclusion2 decks2 decks
99%synergy
Relic Retriever
100%inclusion1 decks1 decks
100%synergy
Eclipsed Boggart
50%inclusion1 decks2 decks
46%synergy
Insectoid Exterminator
50%inclusion1 decks2 decks
50%synergy
Purple Dragon Punks
50%inclusion1 decks2 decks
50%synergy
Weftstalker Ardent
33%inclusion1 decks3 decks
30%synergy
Casey Jones, Jury-Rig Justiciar
33%inclusion1 decks3 decks
33%synergy
Leaden Myr
32%inclusion7 decks22 decks
30%synergy
Solemn Simulacrum
27%inclusion6 decks22 decks
8%synergy
Ogre Slumlord
27%inclusion6 decks22 decks
26%synergy
Hoverstone Pilgrim
27%inclusion6 decks22 decks
27%synergy
Junktroller
27%inclusion6 decks22 decks
27%synergy
Karumonix, the Rat King
27%inclusion6 decks22 decks
27%synergy
Ayara, First of Locthwain
23%inclusion5 decks22 decks
21%synergy
Iron Myr
23%inclusion5 decks22 decks
20%synergy
Priest of Gix
23%inclusion5 decks22 decks
21%synergy
Crypt Rats
18%inclusion4 decks22 decks
18%synergy
Pack Rat
18%inclusion4 decks22 decks
18%synergy
Pitiless Plunderer
18%inclusion4 decks22 decks
5%synergy
Ratcatcher
18%inclusion4 decks22 decks
18%synergy
Alloy Myr
18%inclusion4 decks22 decks
18%synergy
Barkform Harvester
16%inclusion3 decks19 decks
15%synergy
Hedron Crawler
14%inclusion3 decks22 decks
13%synergy
Ornithopter of Paradise
14%inclusion3 decks22 decks
10%synergy
Burnished Hart
14%inclusion3 decks22 decks
9%synergy
Tattered Ratter
14%inclusion3 decks22 decks
13%synergy
Totentanz, Swarm Piper
14%inclusion3 decks22 decks
13%synergy
Priest of Urabrask
14%inclusion3 decks22 decks
12%synergy
Duplicant
14%inclusion3 decks22 decks
13%synergy
Valley Rotcaller
11%inclusion2 decks19 decks
9%synergy
Alesha, Who Laughs at Fate
9.1%inclusion1 decks11 decks
5%synergy
Brash Taunter
9.1%inclusion2 decks22 decks
-1%synergy
Lord Skitter's Butcher
9.1%inclusion2 decks22 decks
9%synergy
Tuktuk Rubblefort
9.1%inclusion2 decks22 decks
9%synergy
Ruthless Technomancer
9.1%inclusion2 decks22 decks
5%synergy
Species Specialist
9.1%inclusion2 decks22 decks
8%synergy
Obosh, the Preypiercer
9.1%inclusion2 decks22 decks
8%synergy
Myr Convert
9.1%inclusion2 decks22 decks
8%synergy
Boggart Trawler
9.1%inclusion2 decks22 decks
2%synergy
Ravenous Chupacabra
9.1%inclusion2 decks22 decks
7%synergy
Molten Gatekeeper
9.1%inclusion2 decks22 decks
7%synergy
Clone Shell
9.1%inclusion2 decks22 decks
9%synergy
Ashcoat of the Shadow Swarm
9.1%inclusion2 decks22 decks
9%synergy
Ulamog, the Infinite Gyre
9.1%inclusion2 decks22 decks
8%synergy
Workhorse
9.1%inclusion2 decks22 decks
8%synergy
K'rrik, Son of Yawgmoth
9.1%inclusion2 decks22 decks
6%synergy
Manakin
9.1%inclusion2 decks22 decks
9%synergy
Hidetsugu, Devouring Chaos
9.1%inclusion2 decks22 decks
8%synergy
Meteor Golem
9.1%inclusion2 decks22 decks
7%synergy
General Kreat, the Boltbringer
9.1%inclusion1 decks11 decks
7%synergy
Instants
Valakut Awakening
27%inclusion6 decks22 decks
19%synergy
Deadly Rollick
18%inclusion4 decks22 decks
-4%synergy
Chaos Warp
18%inclusion4 decks22 decks
-29%synergy
Dark Ritual
18%inclusion4 decks22 decks
-24%synergy
Deflecting Swat
18%inclusion4 decks22 decks
-3%synergy
Volcanic Spite
14%inclusion3 decks22 decks
13%synergy
Fire Prophecy
14%inclusion3 decks22 decks
13%synergy
Fell the Profane
9.1%inclusion2 decks22 decks
-4%synergy
Go for the Throat
9.1%inclusion2 decks22 decks
1%synergy
Rakdos Charm
9.1%inclusion2 decks22 decks
-35%synergy
Bitter Triumph
9.1%inclusion2 decks22 decks
4%synergy
Malakir Rebirth
9.1%inclusion2 decks22 decks
-6%synergy
Withering Torment
8.3%inclusion1 decks12 decks
-13%synergy
Sorceries
Feed the Swarm
27%inclusion6 decks22 decks
-14%synergy
Living Death
27%inclusion6 decks22 decks
23%synergy
Vandalblast
23%inclusion5 decks22 decks
-8%synergy
Blasphemous Act
23%inclusion5 decks22 decks
-28%synergy
Echoing Return
18%inclusion4 decks22 decks
18%synergy
Toxic Deluge
18%inclusion4 decks22 decks
1%synergy
Diabolic Intent
14%inclusion3 decks22 decks
5%synergy
Diabolic Tutor
14%inclusion3 decks22 decks
8%synergy
Song of Totentanz
14%inclusion3 decks22 decks
11%synergy
Kindred Dominance
14%inclusion3 decks22 decks
11%synergy
Grim Tutor
14%inclusion3 decks22 decks
9%synergy
Read the Bones
9.1%inclusion2 decks22 decks
-3%synergy
Sundering Eruption
9.1%inclusion2 decks22 decks
4%synergy
Damnation
9.1%inclusion2 decks22 decks
2%synergy
Into the Fire
9.1%inclusion2 decks22 decks
8%synergy
Kindred Charge
9.1%inclusion2 decks22 decks
8%synergy
Plague of Vermin
9.1%inclusion2 decks22 decks
9%synergy
Utility Artifacts
Crystal Ball
27%inclusion6 decks22 decks
27%synergy
Teferi's Puzzle Box
23%inclusion5 decks22 decks
22%synergy
Coat of Arms
23%inclusion5 decks22 decks
22%synergy
Illusionist's Bracers
18%inclusion4 decks22 decks
17%synergy
Wayfarer's Bauble
18%inclusion4 decks22 decks
5%synergy
Mirror Box
18%inclusion4 decks22 decks
15%synergy
Vanquisher's Banner
18%inclusion4 decks22 decks
15%synergy
Darksteel Pendant
14%inclusion3 decks22 decks
13%synergy
Ashnod's Altar
14%inclusion3 decks22 decks
3%synergy
Cloak and Dagger
14%inclusion3 decks22 decks
13%synergy
Expedition Map
14%inclusion3 decks22 decks
12%synergy
Akroma's Memorial
14%inclusion3 decks22 decks
13%synergy
Jet Medallion
14%inclusion3 decks22 decks
6%synergy
Swiftfoot Boots
14%inclusion3 decks22 decks
-18%synergy
Reito Lantern
14%inclusion3 decks22 decks
13%synergy
Tel-Jilad Stylus
9.1%inclusion2 decks22 decks
8%synergy
Herald's Horn
9.1%inclusion2 decks22 decks
5%synergy
Enchantments
Phyrexian Arena
18%inclusion4 decks22 decks
-5%synergy
Black Market
14%inclusion3 decks22 decks
9%synergy
Warstorm Surge
9.1%inclusion2 decks22 decks
5%synergy
Mirror March
9.1%inclusion2 decks22 decks
7%synergy
Cover of Darkness
9.1%inclusion2 decks22 decks
8%synergy
Oversold Cemetery
9.1%inclusion2 decks22 decks
7%synergy
Utility Lands
Nykthos, Shrine to Nyx
41%inclusion9 decks22 decks
39%synergy
Urborg, Tomb of Yawgmoth
27%inclusion6 decks22 decks
9%synergy
Swarmyard
23%inclusion5 decks22 decks
22%synergy
Zhalfirin Void
18%inclusion4 decks22 decks
17%synergy
Cabal Coffers
18%inclusion4 decks22 decks
9%synergy
Reliquary Tower
18%inclusion4 decks22 decks
0%synergy
Cabal Stronghold
14%inclusion3 decks22 decks
13%synergy
Buried Ruin
14%inclusion3 decks22 decks
10%synergy
Isolated Watchtower
14%inclusion3 decks22 decks
13%synergy
Crypt of Agadeem
14%inclusion3 decks22 decks
13%synergy
Bojuka Bog
9.1%inclusion2 decks22 decks
-26%synergy
Phyrexian Tower
9.1%inclusion2 decks22 decks
-2%synergy
Restless Vents
9.1%inclusion2 decks22 decks
4%synergy
Three Tree City
5.3%inclusion1 decks19 decks
2%synergy
Mana Artifacts
Sol Ring
73%inclusion16 decks22 decks
-13%synergy
Arcane Signet
50%inclusion11 decks22 decks
-32%synergy
Rakdos Signet
50%inclusion11 decks22 decks
-8%synergy
Thran Turbine
32%inclusion7 decks22 decks
31%synergy
Talisman of Indulgence
27%inclusion6 decks22 decks
-28%synergy
Commander's Sphere
9.1%inclusion2 decks22 decks
-7%synergy
Mox Amber
9.1%inclusion2 decks22 decks
5%synergy
Fellwar Stone
9.1%inclusion2 decks22 decks
-24%synergy
Thought Vessel
9.1%inclusion2 decks22 decks
-9%synergy
Mind Stone
9.1%inclusion2 decks22 decks
-19%synergy
Nyx Lotus
9.1%inclusion2 decks22 decks
9%synergy
Patchwork Banner
5.3%inclusion1 decks19 decks
1%synergy
Lands
Swamp
100%inclusion22 decks22 decks
2%synergy
Mountain
95%inclusion21 decks22 decks
-2%synergy
Command Tower
68%inclusion15 decks22 decks
-18%synergy
Smoldering Marsh
50%inclusion11 decks22 decks
-13%synergy
Dragonskull Summit
50%inclusion11 decks22 decks
-14%synergy
Blood Crypt
45%inclusion10 decks22 decks
-1%synergy
Temple of Malice
45%inclusion10 decks22 decks
12%synergy
Tainted Peak
36%inclusion8 decks22 decks
-7%synergy
Foreboding Ruins
32%inclusion7 decks22 decks
-14%synergy
Myriad Landscape
27%inclusion6 decks22 decks
10%synergy
Sulfurous Springs
27%inclusion6 decks22 decks
-20%synergy
Bloodstained Mire
27%inclusion6 decks22 decks
-6%synergy
Valakut Awakening
27%inclusion6 decks22 decks
19%synergy
Raucous Theater
23%inclusion5 decks22 decks
1%synergy
Shadowblood Ridge
23%inclusion5 decks22 decks
-12%synergy
Canyon Slough
23%inclusion5 decks22 decks
3%synergy
Graven Cairns
18%inclusion4 decks22 decks
-13%synergy
Luxury Suite
18%inclusion4 decks22 decks
-20%synergy
Evolving Wilds
18%inclusion4 decks22 decks
-3%synergy
Blightstep Pathway
18%inclusion4 decks22 decks
-4%synergy
Crystal Grotto
18%inclusion4 decks22 decks
18%synergy
Blackcleave Cliffs
14%inclusion3 decks22 decks
-7%synergy
The Grey Havens
14%inclusion3 decks22 decks
13%synergy
Haunted Ridge
14%inclusion3 decks22 decks
-22%synergy
Fell the Profane
9.1%inclusion2 decks22 decks
-4%synergy
Rakdos Carnarium
9.1%inclusion2 decks22 decks
-22%synergy
Boggart Trawler
9.1%inclusion2 decks22 decks
2%synergy
Plaza of Heroes
9.1%inclusion2 decks22 decks
7%synergy
Malakir Rebirth
9.1%inclusion2 decks22 decks
-6%synergy
Opal Palace
9.1%inclusion2 decks22 decks
8%synergy
Path of Ancestry
9.1%inclusion2 decks22 decks
-7%synergy
Sundering Eruption
9.1%inclusion2 decks22 decks
4%synergy
Geothermal Bog
9.1%inclusion2 decks22 decks
-0%synergy
Blazemire Verge
8.3%inclusion1 decks12 decks
-22%synergy
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