Grenzo, Dungeon Warden (Commander) - Relentless Rats

Grenzo, Dungeon Warden
Rank #553
27decks
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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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Relentless Rats
100%inclusion27 decks27 decks
100%synergy
Heartstone
67%inclusion18 decks27 decks
65%synergy
Thrumming Stone
56%inclusion15 decks27 decks
55%synergy
Marrow-Gnawer
56%inclusion15 decks27 decks
55%synergy
Piper of the Swarm
56%inclusion15 decks27 decks
55%synergy
Crypt Ghast
52%inclusion14 decks27 decks
49%synergy
Crucible of Worlds
48%inclusion13 decks27 decks
47%synergy
Tomb Trawler
48%inclusion13 decks27 decks
47%synergy
Braid of Fire
48%inclusion13 decks27 decks
46%synergy
The Cauldron of Eternity
44%inclusion12 decks27 decks
43%synergy
Top Cards
Gray Merchant of Asphodel
44%inclusion12 decks27 decks
34%synergy
Mana Echoes
41%inclusion11 decks27 decks
40%synergy
Hoverstone Pilgrim
37%inclusion10 decks27 decks
36%synergy
Anger
37%inclusion10 decks27 decks
24%synergy
Crystal Ball
33%inclusion9 decks27 decks
33%synergy
Bedevil
33%inclusion9 decks27 decks
-1%synergy
Lightning Greaves
33%inclusion9 decks27 decks
-2%synergy
Ogre Slumlord
30%inclusion8 decks27 decks
28%synergy
Patriarch's Bidding
30%inclusion8 decks27 decks
27%synergy
Teferi's Puzzle Box
30%inclusion8 decks27 decks
29%synergy
Game Changers
Ancient Tomb
22%inclusion6 decks27 decks
13%synergy
Demonic Tutor
15%inclusion4 decks27 decks
-3%synergy
Jeska's Will
11%inclusion3 decks27 decks
-12%synergy
Vampiric Tutor
7.4%inclusion2 decks27 decks
-6%synergy
Creatures
The Walls of Ba Sing Se
100%inclusion1 decks1 decks
99%synergy
Weftstalker Ardent
50%inclusion1 decks2 decks
47%synergy
Palladium Myr
30%inclusion8 decks27 decks
28%synergy
Leaden Myr
30%inclusion8 decks27 decks
27%synergy
Bronze Walrus
26%inclusion7 decks27 decks
25%synergy
Iron Myr
26%inclusion7 decks27 decks
24%synergy
Junktroller
26%inclusion7 decks27 decks
25%synergy
Karumonix, the Rat King
26%inclusion7 decks27 decks
26%synergy
Solemn Simulacrum
22%inclusion6 decks27 decks
2%synergy
Ayara, First of Locthwain
19%inclusion5 decks27 decks
17%synergy
Priest of Gix
19%inclusion5 decks27 decks
16%synergy
Barkform Harvester
17%inclusion3 decks18 decks
16%synergy
Crypt Rats
15%inclusion4 decks27 decks
14%synergy
Tuktuk Rubblefort
15%inclusion4 decks27 decks
14%synergy
Pack Rat
15%inclusion4 decks27 decks
14%synergy
Pitiless Plunderer
15%inclusion4 decks27 decks
2%synergy
Ratcatcher
15%inclusion4 decks27 decks
15%synergy
Totentanz, Swarm Piper
15%inclusion4 decks27 decks
14%synergy
Duplicant
15%inclusion4 decks27 decks
14%synergy
Hedron Crawler
11%inclusion3 decks27 decks
11%synergy
Ornithopter of Paradise
11%inclusion3 decks27 decks
7%synergy
Burnished Hart
11%inclusion3 decks27 decks
6%synergy
Valley Rotcaller
11%inclusion2 decks18 decks
10%synergy
Ashcoat of the Shadow Swarm
11%inclusion3 decks27 decks
11%synergy
Tattered Ratter
11%inclusion3 decks27 decks
11%synergy
Priest of Urabrask
11%inclusion3 decks27 decks
9%synergy
Alloy Myr
11%inclusion3 decks27 decks
11%synergy
General Kreat, the Boltbringer
10%inclusion1 decks10 decks
8%synergy
Tinybones, Bauble Burglar
10%inclusion1 decks10 decks
9%synergy
The Lord of Pain
9.1%inclusion1 decks11 decks
-1%synergy
Enduring Courage
9.1%inclusion1 decks11 decks
6%synergy
Molten Gatekeeper
8.7%inclusion2 decks23 decks
6%synergy
Boggart Trawler
8.3%inclusion2 decks24 decks
1%synergy
Metallic Mimic
7.4%inclusion2 decks27 decks
6%synergy
Blood Artist
7.4%inclusion2 decks27 decks
-11%synergy
Brash Taunter
7.4%inclusion2 decks27 decks
-3%synergy
Lord Skitter's Butcher
7.4%inclusion2 decks27 decks
7%synergy
Species Specialist
7.4%inclusion2 decks27 decks
7%synergy
Obosh, the Preypiercer
7.4%inclusion2 decks27 decks
6%synergy
Ravenous Chupacabra
7.4%inclusion2 decks27 decks
5%synergy
Ulamog, the Infinite Gyre
7.4%inclusion2 decks27 decks
6%synergy
Workhorse
7.4%inclusion2 decks27 decks
7%synergy
Hellraiser Goblin
7.4%inclusion2 decks27 decks
7%synergy
K'rrik, Son of Yawgmoth
7.4%inclusion2 decks27 decks
4%synergy
Manakin
7.4%inclusion2 decks27 decks
7%synergy
Hidetsugu, Devouring Chaos
7.4%inclusion2 decks27 decks
6%synergy
Meteor Golem
7.4%inclusion2 decks27 decks
5%synergy
Herald of Leshrac
7.4%inclusion2 decks27 decks
7%synergy
Agate Instigator
5.9%inclusion1 decks17 decks
2%synergy
Instants
Terminate
30%inclusion8 decks27 decks
-10%synergy
Valakut Awakening
30%inclusion8 decks27 decks
22%synergy
Deadly Rollick
22%inclusion6 decks27 decks
1%synergy
Chaos Warp
19%inclusion5 decks27 decks
-29%synergy
Deflecting Swat
19%inclusion5 decks27 decks
-2%synergy
Volcanic Spite
15%inclusion4 decks27 decks
14%synergy
Dark Ritual
15%inclusion4 decks27 decks
-27%synergy
Fire Prophecy
15%inclusion4 decks27 decks
14%synergy
Withering Torment
9.1%inclusion1 decks11 decks
-13%synergy
Fell the Profane
8.0%inclusion2 decks25 decks
-4%synergy
Go for the Throat
7.4%inclusion2 decks27 decks
0%synergy
Rakdos Charm
7.4%inclusion2 decks27 decks
-36%synergy
Bitter Triumph
7.4%inclusion2 decks27 decks
3%synergy
Malakir Rebirth
7.4%inclusion2 decks27 decks
-8%synergy
Sorceries
Feed the Swarm
26%inclusion7 decks27 decks
-16%synergy
Blasphemous Act
26%inclusion7 decks27 decks
-25%synergy
Vandalblast
22%inclusion6 decks27 decks
-8%synergy
Echoing Return
19%inclusion5 decks27 decks
18%synergy
Living Death
19%inclusion5 decks27 decks
15%synergy
Toxic Deluge
19%inclusion5 decks27 decks
1%synergy
Kindred Dominance
15%inclusion4 decks27 decks
12%synergy
Diabolic Intent
11%inclusion3 decks27 decks
3%synergy
Diabolic Tutor
11%inclusion3 decks27 decks
5%synergy
Song of Totentanz
11%inclusion3 decks27 decks
9%synergy
Grim Tutor
11%inclusion3 decks27 decks
7%synergy
Into the Fire
11%inclusion3 decks27 decks
10%synergy
Sundering Eruption
8.0%inclusion2 decks25 decks
3%synergy
Read the Bones
7.4%inclusion2 decks27 decks
-5%synergy
Damnation
7.4%inclusion2 decks27 decks
0%synergy
Kindred Charge
7.4%inclusion2 decks27 decks
7%synergy
Plague of Vermin
7.4%inclusion2 decks27 decks
7%synergy
Utility Artifacts
Illusionist's Bracers
26%inclusion7 decks27 decks
25%synergy
Coat of Arms
26%inclusion7 decks27 decks
25%synergy
Mirror Box
22%inclusion6 decks27 decks
19%synergy
Ashnod's Altar
19%inclusion5 decks27 decks
8%synergy
Vanquisher's Banner
19%inclusion5 decks27 decks
16%synergy
Reito Lantern
19%inclusion5 decks27 decks
18%synergy
Wayfarer's Bauble
15%inclusion4 decks27 decks
2%synergy
Darksteel Pendant
15%inclusion4 decks27 decks
15%synergy
Jet Medallion
15%inclusion4 decks27 decks
7%synergy
Swiftfoot Boots
15%inclusion4 decks27 decks
-17%synergy
Cloak and Dagger
11%inclusion3 decks27 decks
11%synergy
Expedition Map
11%inclusion3 decks27 decks
9%synergy
Akroma's Memorial
11%inclusion3 decks27 decks
11%synergy
Herald's Horn
11%inclusion3 decks27 decks
7%synergy
Desecrated Tomb
7.4%inclusion2 decks27 decks
7%synergy
Skullclamp
7.4%inclusion2 decks27 decks
-3%synergy
Tel-Jilad Stylus
7.4%inclusion2 decks27 decks
7%synergy
Enchantments
Shared Animosity
30%inclusion8 decks27 decks
26%synergy
Black Market
19%inclusion5 decks27 decks
14%synergy
Phyrexian Arena
19%inclusion5 decks27 decks
-5%synergy
Fervor
15%inclusion4 decks27 decks
14%synergy
Warstorm Surge
11%inclusion3 decks27 decks
7%synergy
Impact Tremors
11%inclusion3 decks27 decks
0%synergy
Mirror March
11%inclusion3 decks27 decks
9%synergy
Cover of Darkness
11%inclusion3 decks27 decks
10%synergy
Fires of Invention
7.4%inclusion2 decks27 decks
7%synergy
Rising of the Day
7.4%inclusion2 decks27 decks
3%synergy
Oversold Cemetery
7.4%inclusion2 decks27 decks
5%synergy
Utility Lands
Nykthos, Shrine to Nyx
41%inclusion11 decks27 decks
39%synergy
Urborg, Tomb of Yawgmoth
33%inclusion9 decks27 decks
15%synergy
Cabal Coffers
26%inclusion7 decks27 decks
16%synergy
Zhalfirin Void
22%inclusion6 decks27 decks
21%synergy
Swarmyard
19%inclusion5 decks27 decks
18%synergy
Cabal Stronghold
15%inclusion4 decks27 decks
14%synergy
Isolated Watchtower
15%inclusion4 decks27 decks
15%synergy
Reliquary Tower
15%inclusion4 decks27 decks
-3%synergy
Phyrexian Tower
11%inclusion3 decks27 decks
1%synergy
Buried Ruin
11%inclusion3 decks27 decks
8%synergy
Crypt of Agadeem
11%inclusion3 decks27 decks
10%synergy
Bojuka Bog
7.4%inclusion2 decks27 decks
-28%synergy
Restless Vents
7.4%inclusion2 decks27 decks
3%synergy
Temple of the False God
7.4%inclusion2 decks27 decks
-2%synergy
Great Furnace
7.4%inclusion2 decks27 decks
1%synergy
Three Tree City
5.6%inclusion1 decks18 decks
2%synergy
Mana Artifacts
Sol Ring
78%inclusion21 decks27 decks
-8%synergy
Arcane Signet
52%inclusion14 decks27 decks
-30%synergy
Rakdos Signet
44%inclusion12 decks27 decks
-14%synergy
Thran Turbine
37%inclusion10 decks27 decks
36%synergy
Talisman of Indulgence
26%inclusion7 decks27 decks
-29%synergy
Mana Crypt
11%inclusion3 decks27 decks
10%synergy
Mox Amber
11%inclusion3 decks27 decks
7%synergy
Thought Vessel
11%inclusion3 decks27 decks
-7%synergy
Everflowing Chalice
7.4%inclusion2 decks27 decks
4%synergy
Commander's Sphere
7.4%inclusion2 decks27 decks
-9%synergy
Fellwar Stone
7.4%inclusion2 decks27 decks
-26%synergy
Thran Dynamo
7.4%inclusion2 decks27 decks
3%synergy
Mind Stone
7.4%inclusion2 decks27 decks
-21%synergy
Nyx Lotus
7.4%inclusion2 decks27 decks
7%synergy
Patchwork Banner
5.6%inclusion1 decks18 decks
2%synergy
Lands
Swamp
100%inclusion27 decks27 decks
2%synergy
Mountain
93%inclusion25 decks27 decks
-5%synergy
Command Tower
67%inclusion18 decks27 decks
-19%synergy
Dragonskull Summit
56%inclusion15 decks27 decks
-8%synergy
Smoldering Marsh
52%inclusion14 decks27 decks
-11%synergy
Blood Crypt
52%inclusion14 decks27 decks
5%synergy
Temple of Malice
44%inclusion12 decks27 decks
11%synergy
Tainted Peak
37%inclusion10 decks27 decks
-6%synergy
Foreboding Ruins
33%inclusion9 decks27 decks
-12%synergy
Sulfurous Springs
33%inclusion9 decks27 decks
-14%synergy
Bloodstained Mire
33%inclusion9 decks27 decks
0%synergy
Graven Cairns
30%inclusion8 decks27 decks
-1%synergy
Luxury Suite
30%inclusion8 decks27 decks
-8%synergy
Blightstep Pathway
30%inclusion8 decks27 decks
7%synergy
Valakut Awakening
30%inclusion8 decks27 decks
22%synergy
Raucous Theater
22%inclusion6 decks27 decks
0%synergy
Haunted Ridge
22%inclusion6 decks27 decks
-14%synergy
Crystal Grotto
22%inclusion6 decks27 decks
22%synergy
Shadowblood Ridge
19%inclusion5 decks27 decks
-17%synergy
Canyon Slough
19%inclusion5 decks27 decks
-1%synergy
Myriad Landscape
19%inclusion5 decks27 decks
1%synergy
The Grey Havens
19%inclusion5 decks27 decks
18%synergy
Rakdos Carnarium
15%inclusion4 decks27 decks
-17%synergy
Badlands
15%inclusion4 decks27 decks
2%synergy
Blackcleave Cliffs
15%inclusion4 decks27 decks
-5%synergy
Evolving Wilds
11%inclusion3 decks27 decks
-10%synergy
Polluted Delta
11%inclusion3 decks27 decks
3%synergy
Blazemire Verge
9.1%inclusion1 decks11 decks
-21%synergy
Boggart Trawler
8.3%inclusion2 decks24 decks
1%synergy
Fell the Profane
8.0%inclusion2 decks25 decks
-4%synergy
Sundering Eruption
8.0%inclusion2 decks25 decks
3%synergy
Exotic Orchard
7.4%inclusion2 decks27 decks
-24%synergy
Bloodfell Caves
7.4%inclusion2 decks27 decks
-12%synergy
Plaza of Heroes
7.4%inclusion2 decks27 decks
6%synergy
Malakir Rebirth
7.4%inclusion2 decks27 decks
-8%synergy
Opal Palace
7.4%inclusion2 decks27 decks
6%synergy
Path of Ancestry
7.4%inclusion2 decks27 decks
-9%synergy
Marsh Flats
7.4%inclusion2 decks27 decks
-1%synergy
Geothermal Bog
7.4%inclusion2 decks27 decks
-2%synergy
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