The Master of Keys (Commander) - Expensive Upgraded Control

The Master of Keys
Rank #316
3decks
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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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Sorceries
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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Smothering Tithe
67%inclusion2 decks3 decks
34%synergy
Rhystic Study
67%inclusion2 decks3 decks
34%synergy
Teferi's Protection
33%inclusion1 decks3 decks
16%synergy
Serra's Sanctum
33%inclusion1 decks3 decks
32%synergy
The One Ring
33%inclusion1 decks3 decks
20%synergy
Intuition
33%inclusion1 decks3 decks
32%synergy
Necropotence
33%inclusion1 decks3 decks
26%synergy
Creatures
Overlord of the Floodpits
67%inclusion2 decks3 decks
63%synergy
Lurrus of the Dream-Den
67%inclusion2 decks3 decks
65%synergy
Scrabbling Skullcrab
33%inclusion1 decks3 decks
32%synergy
Gravebreaker Lamia
33%inclusion1 decks3 decks
32%synergy
Y'shtola, Night's Blessed
33%inclusion1 decks3 decks
32%synergy
Sheoldred, the Apocalypse
33%inclusion1 decks3 decks
25%synergy
Archon of Sun's Grace
33%inclusion1 decks3 decks
29%synergy
Inquisitive Glimmer
33%inclusion1 decks3 decks
26%synergy
Demon of Fate's Design
33%inclusion1 decks3 decks
28%synergy
Jace, Vryn's Prodigy
33%inclusion1 decks3 decks
33%synergy
Fear of Impostors
33%inclusion1 decks3 decks
32%synergy
Sage of Mysteries
33%inclusion1 decks3 decks
33%synergy
Leonin Relic-Warder
33%inclusion1 decks3 decks
33%synergy
Talion, the Kindly Lord
33%inclusion1 decks3 decks
25%synergy
Neerdiv, Devious Diver
33%inclusion1 decks3 decks
33%synergy
Sun Titan
33%inclusion1 decks3 decks
25%synergy
Doomwake Giant
33%inclusion1 decks3 decks
27%synergy
Grim Guardian
33%inclusion1 decks3 decks
31%synergy
Heliod, the Radiant Dawn
33%inclusion1 decks3 decks
29%synergy
Nezahal, Primal Tide
33%inclusion1 decks3 decks
29%synergy
Ghostly Dancers
33%inclusion1 decks3 decks
31%synergy
Toxrill, the Corrosive
33%inclusion1 decks3 decks
31%synergy
Entity Tracker
33%inclusion1 decks3 decks
27%synergy
Abdel Adrian, Gorion's Ward
33%inclusion1 decks3 decks
32%synergy
Valgavoth, Terror Eater
33%inclusion1 decks3 decks
30%synergy
Hullbreaker Horror
33%inclusion1 decks3 decks
27%synergy
Psychic Frog
33%inclusion1 decks3 decks
27%synergy
Ledger Shredder
33%inclusion1 decks3 decks
24%synergy
Jin-Gitaxias, Core Augur
33%inclusion1 decks3 decks
30%synergy
Emet-Selch of the Third Seat
33%inclusion1 decks3 decks
24%synergy
Fandaniel, Telophoroi Ascian
33%inclusion1 decks3 decks
27%synergy
Papalymo Totolymo
33%inclusion1 decks3 decks
23%synergy
Instants
An Offer You Can't Refuse
100%inclusion3 decks3 decks
74%synergy
Mana Drain
100%inclusion3 decks3 decks
83%synergy
Swan Song
100%inclusion3 decks3 decks
81%synergy
Entomb
67%inclusion2 decks3 decks
60%synergy
Swords to Plowshares
67%inclusion2 decks3 decks
-2%synergy
Sink into Stupor
67%inclusion2 decks3 decks
54%synergy
Mental Misstep
33%inclusion1 decks3 decks
26%synergy
Snuff Out
33%inclusion1 decks3 decks
26%synergy
Lim-Dûl's Vault
33%inclusion1 decks3 decks
30%synergy
Fact or Fiction
33%inclusion1 decks3 decks
29%synergy
Brain Freeze
33%inclusion1 decks3 decks
33%synergy
Darkblast
33%inclusion1 decks3 decks
33%synergy
Thirst for Meaning
33%inclusion1 decks3 decks
32%synergy
Strix Serenade
33%inclusion1 decks3 decks
30%synergy
Flusterstorm
33%inclusion1 decks3 decks
25%synergy
Jwari Disruption
33%inclusion1 decks3 decks
33%synergy
Force of Negation
33%inclusion1 decks3 decks
21%synergy
Anguished Unmaking
33%inclusion1 decks3 decks
9%synergy
Faithful Mending
33%inclusion1 decks3 decks
29%synergy
Path to Exile
33%inclusion1 decks3 decks
-9%synergy
Pact of Negation
33%inclusion1 decks3 decks
25%synergy
Sorceries
Toxic Deluge
100%inclusion3 decks3 decks
81%synergy
Supreme Verdict
67%inclusion2 decks3 decks
52%synergy
Sevinne's Reclamation
67%inclusion2 decks3 decks
58%synergy
Damn
67%inclusion2 decks3 decks
46%synergy
Resurgent Belief
33%inclusion1 decks3 decks
31%synergy
Yawgmoth's Will
33%inclusion1 decks3 decks
32%synergy
Farewell
33%inclusion1 decks3 decks
20%synergy
Replenish
33%inclusion1 decks3 decks
32%synergy
Vindicate
33%inclusion1 decks3 decks
23%synergy
Demonic Counsel
33%inclusion1 decks3 decks
32%synergy
Slaughter the Strong
33%inclusion1 decks3 decks
33%synergy
Reanimate
33%inclusion1 decks3 decks
17%synergy
Inevitable Betrayal
33%inclusion1 decks3 decks
33%synergy
Compulsive Research
33%inclusion1 decks3 decks
33%synergy
Circle of Power
33%inclusion1 decks3 decks
26%synergy
Cornered by Black Mages
33%inclusion1 decks3 decks
31%synergy
Utility Artifacts
Mesmeric Orb
67%inclusion2 decks3 decks
66%synergy
Ankh of Mishra
33%inclusion1 decks3 decks
33%synergy
Palantír of Orthanc
33%inclusion1 decks3 decks
32%synergy
Wishclaw Talisman
33%inclusion1 decks3 decks
25%synergy
Enchantments
The Meathook Massacre
100%inclusion3 decks3 decks
97%synergy
Dance of the Dead
100%inclusion3 decks3 decks
98%synergy
Ripples of Undeath
100%inclusion3 decks3 decks
97%synergy
Necromancy
100%inclusion3 decks3 decks
95%synergy
Mystic Remora
100%inclusion3 decks3 decks
79%synergy
Animate Dead
100%inclusion3 decks3 decks
90%synergy
Ghostly Prison
100%inclusion3 decks3 decks
78%synergy
Propaganda
100%inclusion3 decks3 decks
74%synergy
Out of the Tombs
67%inclusion2 decks3 decks
66%synergy
Chronic Flooding
67%inclusion2 decks3 decks
67%synergy
Cemetery Tampering
67%inclusion2 decks3 decks
66%synergy
Seal of Cleansing
67%inclusion2 decks3 decks
65%synergy
Static Prison
67%inclusion2 decks3 decks
66%synergy
Dress Down
67%inclusion2 decks3 decks
64%synergy
Stillness in Motion
67%inclusion2 decks3 decks
66%synergy
Seal of Removal
67%inclusion2 decks3 decks
66%synergy
Trouble in Pairs
67%inclusion2 decks3 decks
61%synergy
Sinister Concoction
67%inclusion2 decks3 decks
67%synergy
Darksteel Mutation
33%inclusion1 decks3 decks
27%synergy
Counterbalance
33%inclusion1 decks3 decks
32%synergy
Smuggler's Share
33%inclusion1 decks3 decks
31%synergy
Grasp of Fate
33%inclusion1 decks3 decks
27%synergy
Court of Cunning
33%inclusion1 decks3 decks
32%synergy
Sigil of the Empty Throne
33%inclusion1 decks3 decks
27%synergy
Unable to Scream
33%inclusion1 decks3 decks
32%synergy
Tinybones Joins Up
33%inclusion1 decks3 decks
32%synergy
Utter Insignificance
33%inclusion1 decks3 decks
33%synergy
Corroding Dragonstorm
33%inclusion1 decks3 decks
33%synergy
Touch the Spirit Realm
33%inclusion1 decks3 decks
31%synergy
Blind Obedience
33%inclusion1 decks3 decks
21%synergy
Hopeless Nightmare
33%inclusion1 decks3 decks
33%synergy
Mirrormade
33%inclusion1 decks3 decks
24%synergy
Estrid's Invocation
33%inclusion1 decks3 decks
29%synergy
Copy Artifact
33%inclusion1 decks3 decks
32%synergy
Out of Time
33%inclusion1 decks3 decks
32%synergy
Charitable Levy
33%inclusion1 decks3 decks
33%synergy
Shark Typhoon
33%inclusion1 decks3 decks
28%synergy
Sphere of Safety
33%inclusion1 decks3 decks
24%synergy
Underworld Dreams
33%inclusion1 decks3 decks
32%synergy
The Tale of Tamiyo
33%inclusion1 decks3 decks
33%synergy
Lethal Vapors
33%inclusion1 decks3 decks
33%synergy
Amphibian Downpour
33%inclusion1 decks3 decks
29%synergy
Witness Protection
33%inclusion1 decks3 decks
31%synergy
Second Chance
33%inclusion1 decks3 decks
33%synergy
Wound Reflection
33%inclusion1 decks3 decks
32%synergy
Kaya's Ghostform
33%inclusion1 decks3 decks
31%synergy
Painful Quandary
33%inclusion1 decks3 decks
31%synergy
Secret Arcade // Dusty Parlor
33%inclusion1 decks3 decks
28%synergy
Polluted Cistern // Dim Oubliette
33%inclusion1 decks3 decks
33%synergy
Land Tax
33%inclusion1 decks3 decks
27%synergy
Planeswalkers
Ashiok, Dream Render
33%inclusion1 decks3 decks
32%synergy
Utility Lands
Hall of Heliod's Generosity
67%inclusion2 decks3 decks
54%synergy
Urza's Saga
67%inclusion2 decks3 decks
55%synergy
Cephalid Coliseum
67%inclusion2 decks3 decks
63%synergy
Urborg, Tomb of Yawgmoth
67%inclusion2 decks3 decks
53%synergy
Otawara, Soaring City
67%inclusion2 decks3 decks
48%synergy
Bojuka Bog
33%inclusion1 decks3 decks
6%synergy
Wasteland
33%inclusion1 decks3 decks
33%synergy
Bazaar of Baghdad
33%inclusion1 decks3 decks
33%synergy
Cabal Coffers
33%inclusion1 decks3 decks
30%synergy
Geier Reach Sanitarium
33%inclusion1 decks3 decks
29%synergy
Takenuma, Abandoned Mire
33%inclusion1 decks3 decks
27%synergy
Strip Mine
33%inclusion1 decks3 decks
32%synergy
Mana Artifacts
Arcane Signet
100%inclusion3 decks3 decks
12%synergy
Sol Ring
100%inclusion3 decks3 decks
10%synergy
Talisman of Progress
33%inclusion1 decks3 decks
-9%synergy
Talisman of Dominance
33%inclusion1 decks3 decks
-16%synergy
Fellwar Stone
33%inclusion1 decks3 decks
-1%synergy
Talisman of Hierarchy
33%inclusion1 decks3 decks
-10%synergy
Lands
Tundra
100%inclusion3 decks3 decks
84%synergy
Command Tower
100%inclusion3 decks3 decks
8%synergy
Underground Sea
100%inclusion3 decks3 decks
84%synergy
Raffine's Tower
100%inclusion3 decks3 decks
59%synergy
Godless Shrine
100%inclusion3 decks3 decks
50%synergy
Scrubland
100%inclusion3 decks3 decks
84%synergy
Marsh Flats
100%inclusion3 decks3 decks
64%synergy
Polluted Delta
100%inclusion3 decks3 decks
63%synergy
Hallowed Fountain
100%inclusion3 decks3 decks
51%synergy
Flooded Strand
100%inclusion3 decks3 decks
62%synergy
Watery Grave
100%inclusion3 decks3 decks
50%synergy
Prismatic Vista
67%inclusion2 decks3 decks
63%synergy
Undercity Sewers
67%inclusion2 decks3 decks
53%synergy
Misty Rainforest
67%inclusion2 decks3 decks
55%synergy
Shadowy Backstreet
67%inclusion2 decks3 decks
54%synergy
Windswept Heath
67%inclusion2 decks3 decks
57%synergy
Swamp
67%inclusion2 decks3 decks
-25%synergy
Sea of Clouds
67%inclusion2 decks3 decks
31%synergy
Verdant Catacombs
67%inclusion2 decks3 decks
56%synergy
Reflecting Pool
67%inclusion2 decks3 decks
59%synergy
Island
67%inclusion2 decks3 decks
-26%synergy
Plains
67%inclusion2 decks3 decks
-25%synergy
Sink into Stupor
67%inclusion2 decks3 decks
54%synergy
Morphic Pool
67%inclusion2 decks3 decks
32%synergy
Arid Mesa
67%inclusion2 decks3 decks
57%synergy
Scalding Tarn
67%inclusion2 decks3 decks
55%synergy
Meticulous Archive
67%inclusion2 decks3 decks
53%synergy
Mana Confluence
67%inclusion2 decks3 decks
53%synergy
Vault of Champions
67%inclusion2 decks3 decks
34%synergy
Bloodstained Mire
67%inclusion2 decks3 decks
56%synergy
Bleachbone Verge
33%inclusion1 decks3 decks
25%synergy
Tarnished Citadel
33%inclusion1 decks3 decks
33%synergy
Jwari Disruption
33%inclusion1 decks3 decks
33%synergy
Gemstone Caverns
33%inclusion1 decks3 decks
26%synergy
Shattered Sanctum
33%inclusion1 decks3 decks
17%synergy
Gloomlake Verge
33%inclusion1 decks3 decks
22%synergy
Floodfarm Verge
33%inclusion1 decks3 decks
22%synergy
City of Brass
33%inclusion1 decks3 decks
18%synergy
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