The Master of Keys (Commander) - Expensive Upgraded Control

The Master of Keys
Rank #316
2decks
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Background image for What if Thassa's Oracle Were Banned?
Harvey McGuinness
Sep 23, 2025
Harvey McGuinness
What if Thassa's Oracle Were Banned?
What would happen to cEDH if Thassa's Oracle were banned tomorrow? Would the best decks fall apart? Would there be a new meta? Let's discuss.
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Commander Spellbook
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Creatures
Instants
Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
Back to Top
Smothering Tithe
50%inclusion1 decks2 decks
18%synergy
Serra's Sanctum
50%inclusion1 decks2 decks
48%synergy
The One Ring
50%inclusion1 decks2 decks
36%synergy
Intuition
50%inclusion1 decks2 decks
48%synergy
Rhystic Study
50%inclusion1 decks2 decks
17%synergy
Necropotence
50%inclusion1 decks2 decks
43%synergy
Creatures
Scrabbling Skullcrab
50%inclusion1 decks2 decks
49%synergy
Gravebreaker Lamia
50%inclusion1 decks2 decks
49%synergy
Overlord of the Floodpits
50%inclusion1 decks2 decks
46%synergy
Y'shtola, Night's Blessed
50%inclusion1 decks2 decks
49%synergy
Sheoldred, the Apocalypse
50%inclusion1 decks2 decks
41%synergy
Lurrus of the Dream-Den
50%inclusion1 decks2 decks
48%synergy
Archon of Sun's Grace
50%inclusion1 decks2 decks
45%synergy
Sage of Mysteries
50%inclusion1 decks2 decks
50%synergy
Leonin Relic-Warder
50%inclusion1 decks2 decks
50%synergy
Talion, the Kindly Lord
50%inclusion1 decks2 decks
42%synergy
Grim Guardian
50%inclusion1 decks2 decks
47%synergy
Ghostly Dancers
50%inclusion1 decks2 decks
47%synergy
Toxrill, the Corrosive
50%inclusion1 decks2 decks
47%synergy
Abdel Adrian, Gorion's Ward
50%inclusion1 decks2 decks
48%synergy
Hullbreaker Horror
50%inclusion1 decks2 decks
44%synergy
Jin-Gitaxias, Core Augur
50%inclusion1 decks2 decks
47%synergy
Emet-Selch of the Third Seat
50%inclusion1 decks2 decks
40%synergy
Fandaniel, Telophoroi Ascian
50%inclusion1 decks2 decks
43%synergy
Papalymo Totolymo
50%inclusion1 decks2 decks
40%synergy
Instants
An Offer You Can't Refuse
100%inclusion2 decks2 decks
74%synergy
Entomb
100%inclusion2 decks2 decks
93%synergy
Swan Song
100%inclusion2 decks2 decks
81%synergy
Mental Misstep
50%inclusion1 decks2 decks
43%synergy
Snuff Out
50%inclusion1 decks2 decks
43%synergy
Lim-Dûl's Vault
50%inclusion1 decks2 decks
46%synergy
Fact or Fiction
50%inclusion1 decks2 decks
46%synergy
Brain Freeze
50%inclusion1 decks2 decks
49%synergy
Darkblast
50%inclusion1 decks2 decks
50%synergy
Thirst for Meaning
50%inclusion1 decks2 decks
48%synergy
Mana Drain
50%inclusion1 decks2 decks
32%synergy
Flusterstorm
50%inclusion1 decks2 decks
42%synergy
Jwari Disruption
50%inclusion1 decks2 decks
49%synergy
Force of Negation
50%inclusion1 decks2 decks
38%synergy
Swords to Plowshares
50%inclusion1 decks2 decks
-18%synergy
Faithful Mending
50%inclusion1 decks2 decks
46%synergy
Sink into Stupor
50%inclusion1 decks2 decks
38%synergy
Path to Exile
50%inclusion1 decks2 decks
8%synergy
Pact of Negation
50%inclusion1 decks2 decks
42%synergy
Sorceries
Supreme Verdict
100%inclusion2 decks2 decks
85%synergy
Toxic Deluge
100%inclusion2 decks2 decks
81%synergy
Damn
100%inclusion2 decks2 decks
80%synergy
Resurgent Belief
50%inclusion1 decks2 decks
48%synergy
Sevinne's Reclamation
50%inclusion1 decks2 decks
41%synergy
Yawgmoth's Will
50%inclusion1 decks2 decks
49%synergy
Replenish
50%inclusion1 decks2 decks
48%synergy
Vindicate
50%inclusion1 decks2 decks
40%synergy
Demonic Counsel
50%inclusion1 decks2 decks
49%synergy
Slaughter the Strong
50%inclusion1 decks2 decks
50%synergy
Inevitable Betrayal
50%inclusion1 decks2 decks
49%synergy
Compulsive Research
50%inclusion1 decks2 decks
49%synergy
Circle of Power
50%inclusion1 decks2 decks
43%synergy
Cornered by Black Mages
50%inclusion1 decks2 decks
48%synergy
Utility Artifacts
Mesmeric Orb
50%inclusion1 decks2 decks
49%synergy
Ankh of Mishra
50%inclusion1 decks2 decks
50%synergy
Wishclaw Talisman
50%inclusion1 decks2 decks
42%synergy
Enchantments
The Meathook Massacre
100%inclusion2 decks2 decks
96%synergy
Dance of the Dead
100%inclusion2 decks2 decks
98%synergy
Ripples of Undeath
100%inclusion2 decks2 decks
97%synergy
Out of the Tombs
100%inclusion2 decks2 decks
100%synergy
Chronic Flooding
100%inclusion2 decks2 decks
100%synergy
Necromancy
100%inclusion2 decks2 decks
95%synergy
Mystic Remora
100%inclusion2 decks2 decks
78%synergy
Cemetery Tampering
100%inclusion2 decks2 decks
99%synergy
Animate Dead
100%inclusion2 decks2 decks
90%synergy
Stillness in Motion
100%inclusion2 decks2 decks
100%synergy
Ghostly Prison
100%inclusion2 decks2 decks
79%synergy
Propaganda
100%inclusion2 decks2 decks
74%synergy
Seal of Removal
100%inclusion2 decks2 decks
99%synergy
Trouble in Pairs
100%inclusion2 decks2 decks
94%synergy
Sinister Concoction
100%inclusion2 decks2 decks
100%synergy
Darksteel Mutation
50%inclusion1 decks2 decks
44%synergy
Counterbalance
50%inclusion1 decks2 decks
48%synergy
Smuggler's Share
50%inclusion1 decks2 decks
48%synergy
Court of Cunning
50%inclusion1 decks2 decks
49%synergy
Unable to Scream
50%inclusion1 decks2 decks
49%synergy
Tinybones Joins Up
50%inclusion1 decks2 decks
49%synergy
Utter Insignificance
50%inclusion1 decks2 decks
49%synergy
Corroding Dragonstorm
50%inclusion1 decks2 decks
50%synergy
Hopeless Nightmare
50%inclusion1 decks2 decks
50%synergy
Seal of Doom
50%inclusion1 decks2 decks
50%synergy
Out of Time
50%inclusion1 decks2 decks
49%synergy
Underworld Dreams
50%inclusion1 decks2 decks
49%synergy
The Tale of Tamiyo
50%inclusion1 decks2 decks
50%synergy
Lethal Vapors
50%inclusion1 decks2 decks
50%synergy
Witness Protection
50%inclusion1 decks2 decks
48%synergy
Seal of Cleansing
50%inclusion1 decks2 decks
48%synergy
Second Chance
50%inclusion1 decks2 decks
50%synergy
Wound Reflection
50%inclusion1 decks2 decks
49%synergy
Static Prison
50%inclusion1 decks2 decks
49%synergy
Dress Down
50%inclusion1 decks2 decks
47%synergy
Painful Quandary
50%inclusion1 decks2 decks
48%synergy
Secret Arcade // Dusty Parlor
50%inclusion1 decks2 decks
45%synergy
Polluted Cistern // Dim Oubliette
50%inclusion1 decks2 decks
49%synergy
Land Tax
50%inclusion1 decks2 decks
44%synergy
Solitary Confinement
50%inclusion1 decks2 decks
48%synergy
Bloodchief Ascension
50%inclusion1 decks2 decks
45%synergy
Paradox Haze
50%inclusion1 decks2 decks
49%synergy
Mirror Room // Fractured Realm
50%inclusion1 decks2 decks
48%synergy
Aura of Silence
50%inclusion1 decks2 decks
47%synergy
Chains of Mephistopheles
50%inclusion1 decks2 decks
50%synergy
Oppression
50%inclusion1 decks2 decks
50%synergy
Planeswalkers
Ashiok, Dream Render
50%inclusion1 decks2 decks
48%synergy
Utility Lands
Urza's Saga
100%inclusion2 decks2 decks
88%synergy
Cephalid Coliseum
100%inclusion2 decks2 decks
96%synergy
Urborg, Tomb of Yawgmoth
100%inclusion2 decks2 decks
87%synergy
Bojuka Bog
50%inclusion1 decks2 decks
23%synergy
Wasteland
50%inclusion1 decks2 decks
49%synergy
Hall of Heliod's Generosity
50%inclusion1 decks2 decks
37%synergy
Bazaar of Baghdad
50%inclusion1 decks2 decks
50%synergy
Cabal Coffers
50%inclusion1 decks2 decks
47%synergy
Geier Reach Sanitarium
50%inclusion1 decks2 decks
46%synergy
Strip Mine
50%inclusion1 decks2 decks
48%synergy
Otawara, Soaring City
50%inclusion1 decks2 decks
31%synergy
Mana Artifacts
Arcane Signet
100%inclusion2 decks2 decks
12%synergy
Sol Ring
100%inclusion2 decks2 decks
10%synergy
Lands
Tundra
100%inclusion2 decks2 decks
84%synergy
Command Tower
100%inclusion2 decks2 decks
8%synergy
Underground Sea
100%inclusion2 decks2 decks
84%synergy
Reflecting Pool
100%inclusion2 decks2 decks
92%synergy
Raffine's Tower
100%inclusion2 decks2 decks
59%synergy
Godless Shrine
100%inclusion2 decks2 decks
50%synergy
Scrubland
100%inclusion2 decks2 decks
84%synergy
Mana Confluence
100%inclusion2 decks2 decks
86%synergy
Marsh Flats
100%inclusion2 decks2 decks
64%synergy
Polluted Delta
100%inclusion2 decks2 decks
63%synergy
Hallowed Fountain
100%inclusion2 decks2 decks
51%synergy
Flooded Strand
100%inclusion2 decks2 decks
62%synergy
Watery Grave
100%inclusion2 decks2 decks
50%synergy
Prismatic Vista
50%inclusion1 decks2 decks
46%synergy
Undercity Sewers
50%inclusion1 decks2 decks
36%synergy
Misty Rainforest
50%inclusion1 decks2 decks
39%synergy
Shadowy Backstreet
50%inclusion1 decks2 decks
38%synergy
Windswept Heath
50%inclusion1 decks2 decks
40%synergy
Swamp
50%inclusion1 decks2 decks
-41%synergy
Tarnished Citadel
50%inclusion1 decks2 decks
49%synergy
Sea of Clouds
50%inclusion1 decks2 decks
14%synergy
Verdant Catacombs
50%inclusion1 decks2 decks
40%synergy
Jwari Disruption
50%inclusion1 decks2 decks
49%synergy
Island
50%inclusion1 decks2 decks
-43%synergy
Plains
50%inclusion1 decks2 decks
-41%synergy
Sink into Stupor
50%inclusion1 decks2 decks
38%synergy
Morphic Pool
50%inclusion1 decks2 decks
16%synergy
Gemstone Caverns
50%inclusion1 decks2 decks
42%synergy
Arid Mesa
50%inclusion1 decks2 decks
40%synergy
Scalding Tarn
50%inclusion1 decks2 decks
39%synergy
Meticulous Archive
50%inclusion1 decks2 decks
36%synergy
Vault of Champions
50%inclusion1 decks2 decks
17%synergy
City of Brass
50%inclusion1 decks2 decks
35%synergy
Bloodstained Mire
50%inclusion1 decks2 decks
39%synergy
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