Grenzo, Dungeon Warden (Commander) - Relentless Rats

Grenzo, Dungeon Warden
Rank #540
24decks
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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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Relic Retriever
100%inclusion1 decks1 decks
100%synergy
High Synergy Cards
Relentless Rats
100%inclusion24 decks24 decks
100%synergy
Heartstone
67%inclusion16 decks24 decks
64%synergy
Thrumming Stone
58%inclusion14 decks24 decks
58%synergy
Marrow-Gnawer
54%inclusion13 decks24 decks
54%synergy
Piper of the Swarm
54%inclusion13 decks24 decks
54%synergy
Crypt Ghast
50%inclusion12 decks24 decks
47%synergy
Crucible of Worlds
46%inclusion11 decks24 decks
45%synergy
The Cauldron of Eternity
46%inclusion11 decks24 decks
45%synergy
Braid of Fire
46%inclusion11 decks24 decks
44%synergy
Tomb Trawler
42%inclusion10 decks24 decks
41%synergy
Top Cards
Gray Merchant of Asphodel
46%inclusion11 decks24 decks
35%synergy
Mana Echoes
33%inclusion8 decks24 decks
33%synergy
Palladium Myr
33%inclusion8 decks24 decks
32%synergy
Bedevil
33%inclusion8 decks24 decks
-1%synergy
Lightning Greaves
33%inclusion8 decks24 decks
-2%synergy
Ogre Slumlord
29%inclusion7 decks24 decks
28%synergy
Patriarch's Bidding
29%inclusion7 decks24 decks
27%synergy
Bronze Walrus
29%inclusion7 decks24 decks
29%synergy
Terminate
29%inclusion7 decks24 decks
-11%synergy
Shared Animosity
29%inclusion7 decks24 decks
26%synergy
Game Changers
Ancient Tomb
21%inclusion5 decks24 decks
12%synergy
Demonic Tutor
17%inclusion4 decks24 decks
-1%synergy
Vampiric Tutor
8.3%inclusion2 decks24 decks
-5%synergy
Creatures
The Walls of Ba Sing Se
100%inclusion2 decks2 decks
99%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
Anger
29%inclusion7 decks24 decks
16%synergy
Leaden Myr
29%inclusion7 decks24 decks
27%synergy
Solemn Simulacrum
25%inclusion6 decks24 decks
5%synergy
Hoverstone Pilgrim
25%inclusion6 decks24 decks
24%synergy
Junktroller
25%inclusion6 decks24 decks
24%synergy
Karumonix, the Rat King
25%inclusion6 decks24 decks
25%synergy
Ayara, First of Locthwain
21%inclusion5 decks24 decks
20%synergy
Iron Myr
21%inclusion5 decks24 decks
19%synergy
Priest of Gix
21%inclusion5 decks24 decks
19%synergy
Crypt Rats
17%inclusion4 decks24 decks
16%synergy
Pack Rat
17%inclusion4 decks24 decks
16%synergy
Pitiless Plunderer
17%inclusion4 decks24 decks
4%synergy
Ratcatcher
17%inclusion4 decks24 decks
16%synergy
Alloy Myr
17%inclusion4 decks24 decks
16%synergy
Barkform Harvester
16%inclusion3 decks19 decks
15%synergy
Hedron Crawler
13%inclusion3 decks24 decks
12%synergy
Ornithopter of Paradise
13%inclusion3 decks24 decks
9%synergy
Burnished Hart
13%inclusion3 decks24 decks
8%synergy
Tattered Ratter
13%inclusion3 decks24 decks
12%synergy
Totentanz, Swarm Piper
13%inclusion3 decks24 decks
12%synergy
Priest of Urabrask
13%inclusion3 decks24 decks
11%synergy
Duplicant
13%inclusion3 decks24 decks
12%synergy
Valley Rotcaller
11%inclusion2 decks19 decks
9%synergy
Alesha, Who Laughs at Fate
9.1%inclusion1 decks11 decks
5%synergy
General Kreat, the Boltbringer
9.1%inclusion1 decks11 decks
7%synergy
Tinybones, Bauble Burglar
9.1%inclusion1 decks11 decks
8%synergy
Brash Taunter
8.3%inclusion2 decks24 decks
-2%synergy
Lord Skitter's Butcher
8.3%inclusion2 decks24 decks
8%synergy
Tuktuk Rubblefort
8.3%inclusion2 decks24 decks
8%synergy
Ruthless Technomancer
8.3%inclusion2 decks24 decks
4%synergy
Species Specialist
8.3%inclusion2 decks24 decks
8%synergy
Obosh, the Preypiercer
8.3%inclusion2 decks24 decks
7%synergy
Myr Convert
8.3%inclusion2 decks24 decks
7%synergy
Boggart Trawler
8.3%inclusion2 decks24 decks
1%synergy
Ravenous Chupacabra
8.3%inclusion2 decks24 decks
6%synergy
Molten Gatekeeper
8.3%inclusion2 decks24 decks
6%synergy
Clone Shell
8.3%inclusion2 decks24 decks
8%synergy
Ashcoat of the Shadow Swarm
8.3%inclusion2 decks24 decks
8%synergy
The Lord of Pain
8.3%inclusion1 decks12 decks
-2%synergy
Enduring Courage
8.3%inclusion1 decks12 decks
5%synergy
Ulamog, the Infinite Gyre
8.3%inclusion2 decks24 decks
7%synergy
Workhorse
8.3%inclusion2 decks24 decks
8%synergy
K'rrik, Son of Yawgmoth
8.3%inclusion2 decks24 decks
5%synergy
Manakin
8.3%inclusion2 decks24 decks
8%synergy
Instants
Valakut Awakening
25%inclusion6 decks24 decks
17%synergy
Deadly Rollick
17%inclusion4 decks24 decks
-5%synergy
Chaos Warp
17%inclusion4 decks24 decks
-31%synergy
Dark Ritual
17%inclusion4 decks24 decks
-25%synergy
Deflecting Swat
17%inclusion4 decks24 decks
-4%synergy
Volcanic Spite
13%inclusion3 decks24 decks
12%synergy
Fire Prophecy
13%inclusion3 decks24 decks
12%synergy
Fell the Profane
8.3%inclusion2 decks24 decks
-4%synergy
Go for the Throat
8.3%inclusion2 decks24 decks
1%synergy
Rakdos Charm
8.3%inclusion2 decks24 decks
-35%synergy
Bitter Triumph
8.3%inclusion2 decks24 decks
4%synergy
Malakir Rebirth
8.3%inclusion2 decks24 decks
-7%synergy
Withering Torment
8.3%inclusion1 decks12 decks
-13%synergy
Sorceries
Feed the Swarm
25%inclusion6 decks24 decks
-16%synergy
Living Death
25%inclusion6 decks24 decks
21%synergy
Vandalblast
21%inclusion5 decks24 decks
-9%synergy
Blasphemous Act
21%inclusion5 decks24 decks
-30%synergy
Echoing Return
17%inclusion4 decks24 decks
17%synergy
Toxic Deluge
17%inclusion4 decks24 decks
-1%synergy
Diabolic Intent
13%inclusion3 decks24 decks
4%synergy
Diabolic Tutor
13%inclusion3 decks24 decks
7%synergy
Song of Totentanz
13%inclusion3 decks24 decks
10%synergy
Kindred Dominance
13%inclusion3 decks24 decks
10%synergy
Grim Tutor
13%inclusion3 decks24 decks
8%synergy
Read the Bones
8.3%inclusion2 decks24 decks
-4%synergy
Sundering Eruption
8.3%inclusion2 decks24 decks
3%synergy
Damnation
8.3%inclusion2 decks24 decks
1%synergy
Into the Fire
8.3%inclusion2 decks24 decks
7%synergy
Kindred Charge
8.3%inclusion2 decks24 decks
8%synergy
Plague of Vermin
8.3%inclusion2 decks24 decks
8%synergy
Utility Artifacts
Coat of Arms
25%inclusion6 decks24 decks
24%synergy
Crystal Ball
25%inclusion6 decks24 decks
25%synergy
Illusionist's Bracers
21%inclusion5 decks24 decks
20%synergy
Teferi's Puzzle Box
21%inclusion5 decks24 decks
20%synergy
Mirror Box
21%inclusion5 decks24 decks
18%synergy
Wayfarer's Bauble
17%inclusion4 decks24 decks
4%synergy
Ashnod's Altar
17%inclusion4 decks24 decks
6%synergy
Vanquisher's Banner
17%inclusion4 decks24 decks
14%synergy
Reito Lantern
17%inclusion4 decks24 decks
16%synergy
Darksteel Pendant
13%inclusion3 decks24 decks
12%synergy
Cloak and Dagger
13%inclusion3 decks24 decks
12%synergy
Expedition Map
13%inclusion3 decks24 decks
11%synergy
Akroma's Memorial
13%inclusion3 decks24 decks
12%synergy
Jet Medallion
13%inclusion3 decks24 decks
5%synergy
Swiftfoot Boots
13%inclusion3 decks24 decks
-19%synergy
Tel-Jilad Stylus
8.3%inclusion2 decks24 decks
8%synergy
Herald's Horn
8.3%inclusion2 decks24 decks
4%synergy
Enchantments
Black Market
17%inclusion4 decks24 decks
12%synergy
Phyrexian Arena
17%inclusion4 decks24 decks
-7%synergy
Warstorm Surge
8.3%inclusion2 decks24 decks
4%synergy
Fervor
8.3%inclusion2 decks24 decks
7%synergy
Mirror March
8.3%inclusion2 decks24 decks
6%synergy
Cover of Darkness
8.3%inclusion2 decks24 decks
7%synergy
Oversold Cemetery
8.3%inclusion2 decks24 decks
6%synergy
Utility Lands
Nykthos, Shrine to Nyx
42%inclusion10 decks24 decks
40%synergy
Urborg, Tomb of Yawgmoth
29%inclusion7 decks24 decks
10%synergy
Swarmyard
21%inclusion5 decks24 decks
21%synergy
Cabal Coffers
21%inclusion5 decks24 decks
11%synergy
Cabal Stronghold
17%inclusion4 decks24 decks
16%synergy
Zhalfirin Void
17%inclusion4 decks24 decks
16%synergy
Reliquary Tower
17%inclusion4 decks24 decks
-1%synergy
Buried Ruin
13%inclusion3 decks24 decks
9%synergy
Isolated Watchtower
13%inclusion3 decks24 decks
12%synergy
Crypt of Agadeem
13%inclusion3 decks24 decks
12%synergy
Bojuka Bog
8.3%inclusion2 decks24 decks
-27%synergy
Phyrexian Tower
8.3%inclusion2 decks24 decks
-2%synergy
Restless Vents
8.3%inclusion2 decks24 decks
4%synergy
Temple of the False God
8.3%inclusion2 decks24 decks
-2%synergy
Three Tree City
5.3%inclusion1 decks19 decks
2%synergy
Mana Artifacts
Sol Ring
71%inclusion17 decks24 decks
-15%synergy
Arcane Signet
46%inclusion11 decks24 decks
-36%synergy
Rakdos Signet
46%inclusion11 decks24 decks
-12%synergy
Thran Turbine
29%inclusion7 decks24 decks
28%synergy
Talisman of Indulgence
25%inclusion6 decks24 decks
-30%synergy
Everflowing Chalice
8.3%inclusion2 decks24 decks
5%synergy
Commander's Sphere
8.3%inclusion2 decks24 decks
-8%synergy
Mana Crypt
8.3%inclusion2 decks24 decks
7%synergy
Mox Amber
8.3%inclusion2 decks24 decks
4%synergy
Fellwar Stone
8.3%inclusion2 decks24 decks
-25%synergy
Thought Vessel
8.3%inclusion2 decks24 decks
-10%synergy
Mind Stone
8.3%inclusion2 decks24 decks
-20%synergy
Nyx Lotus
8.3%inclusion2 decks24 decks
8%synergy
Patchwork Banner
5.3%inclusion1 decks19 decks
1%synergy
Lands
Swamp
100%inclusion24 decks24 decks
2%synergy
Mountain
92%inclusion22 decks24 decks
-6%synergy
Command Tower
63%inclusion15 decks24 decks
-24%synergy
Smoldering Marsh
50%inclusion12 decks24 decks
-13%synergy
Dragonskull Summit
50%inclusion12 decks24 decks
-13%synergy
Blood Crypt
46%inclusion11 decks24 decks
-1%synergy
Temple of Malice
42%inclusion10 decks24 decks
8%synergy
Tainted Peak
33%inclusion8 decks24 decks
-10%synergy
Foreboding Ruins
29%inclusion7 decks24 decks
-16%synergy
Bloodstained Mire
29%inclusion7 decks24 decks
-4%synergy
Myriad Landscape
25%inclusion6 decks24 decks
7%synergy
Sulfurous Springs
25%inclusion6 decks24 decks
-22%synergy
Valakut Awakening
25%inclusion6 decks24 decks
17%synergy
Raucous Theater
21%inclusion5 decks24 decks
-1%synergy
Shadowblood Ridge
21%inclusion5 decks24 decks
-14%synergy
Canyon Slough
21%inclusion5 decks24 decks
1%synergy
Blightstep Pathway
21%inclusion5 decks24 decks
-2%synergy
Graven Cairns
17%inclusion4 decks24 decks
-15%synergy
Luxury Suite
17%inclusion4 decks24 decks
-21%synergy
Evolving Wilds
17%inclusion4 decks24 decks
-4%synergy
Crystal Grotto
17%inclusion4 decks24 decks
16%synergy
Rakdos Carnarium
13%inclusion3 decks24 decks
-19%synergy
Blackcleave Cliffs
13%inclusion3 decks24 decks
-8%synergy
The Grey Havens
13%inclusion3 decks24 decks
12%synergy
Haunted Ridge
13%inclusion3 decks24 decks
-23%synergy
Fell the Profane
8.3%inclusion2 decks24 decks
-4%synergy
Bloodfell Caves
8.3%inclusion2 decks24 decks
-11%synergy
Boggart Trawler
8.3%inclusion2 decks24 decks
1%synergy
Blazemire Verge
8.3%inclusion1 decks12 decks
-22%synergy
Plaza of Heroes
8.3%inclusion2 decks24 decks
7%synergy
Malakir Rebirth
8.3%inclusion2 decks24 decks
-7%synergy
Opal Palace
8.3%inclusion2 decks24 decks
7%synergy
Path of Ancestry
8.3%inclusion2 decks24 decks
-8%synergy
Sundering Eruption
8.3%inclusion2 decks24 decks
3%synergy
Geothermal Bog
8.3%inclusion2 decks24 decks
-1%synergy
Polluted Delta
8.3%inclusion2 decks24 decks
0%synergy
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