The Master of Keys (Commander) - Expensive Sagas

The Master of Keys
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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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Utility Artifacts
Enchantments
Battles
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Smothering Tithe
100%inclusion2 decks2 decks
68%synergy
Rhystic Study
100%inclusion2 decks2 decks
68%synergy
The One Ring
50%inclusion1 decks2 decks
37%synergy
Demonic Tutor
50%inclusion1 decks2 decks
29%synergy
Fierce Guardianship
50%inclusion1 decks2 decks
29%synergy
Cyclonic Rift
50%inclusion1 decks2 decks
26%synergy
Mystical Tutor
50%inclusion1 decks2 decks
39%synergy
Creatures
Mesa Enchantress
100%inclusion2 decks2 decks
91%synergy
Summon: Leviathan
100%inclusion1 decks1 decks
100%synergy
Summon: Bahamut
100%inclusion1 decks1 decks
99%synergy
Summon: Ixion
100%inclusion1 decks1 decks
100%synergy
Summon: Valefor
100%inclusion1 decks1 decks
100%synergy
Summon: Yojimbo
100%inclusion1 decks1 decks
99%synergy
Thassa, Deep-Dwelling
50%inclusion1 decks2 decks
48%synergy
Demon of Fate's Design
50%inclusion1 decks2 decks
45%synergy
Thrull Parasite
50%inclusion1 decks2 decks
50%synergy
Ashiok's Reaper
50%inclusion1 decks2 decks
50%synergy
The Second Doctor
50%inclusion1 decks2 decks
49%synergy
Jace's Archivist
50%inclusion1 decks2 decks
49%synergy
Doomwake Giant
50%inclusion1 decks2 decks
44%synergy
Hex Parasite
50%inclusion1 decks2 decks
49%synergy
Heliod, the Radiant Dawn
50%inclusion1 decks2 decks
46%synergy
Entity Tracker
50%inclusion1 decks2 decks
44%synergy
Abdel Adrian, Gorion's Ward
50%inclusion1 decks2 decks
48%synergy
Alseid of Life's Bounty
50%inclusion1 decks2 decks
49%synergy
Clever Impersonator
50%inclusion1 decks2 decks
48%synergy
Zur the Enchanter
50%inclusion1 decks2 decks
45%synergy
Vampire Hexmage
50%inclusion1 decks2 decks
50%synergy
Instants
Entomb
50%inclusion1 decks2 decks
43%synergy
Swords to Plowshares
50%inclusion1 decks2 decks
-18%synergy
Sorceries
Space-Time Anomaly
100%inclusion1 decks1 decks
98%synergy
Resurgent Belief
50%inclusion1 decks2 decks
48%synergy
Fractured Identity
50%inclusion1 decks2 decks
49%synergy
Wrath of God
50%inclusion1 decks2 decks
46%synergy
Damn
50%inclusion1 decks2 decks
30%synergy
Damnation
50%inclusion1 decks2 decks
47%synergy
Traumatize
50%inclusion1 decks2 decks
50%synergy
Utility Artifacts
Mesmeric Orb
50%inclusion1 decks2 decks
49%synergy
Power Conduit
50%inclusion1 decks2 decks
49%synergy
Helm of the Gods
50%inclusion1 decks2 decks
49%synergy
Wishclaw Talisman
50%inclusion1 decks2 decks
42%synergy
Swiftfoot Boots
50%inclusion1 decks2 decks
26%synergy
Lightning Greaves
50%inclusion1 decks2 decks
28%synergy
Enchantments
The Eldest Reborn
100%inclusion2 decks2 decks
98%synergy
Mystic Remora
100%inclusion2 decks2 decks
79%synergy
Sphere of Safety
100%inclusion2 decks2 decks
91%synergy
The Tale of Tamiyo
100%inclusion2 decks2 decks
100%synergy
Solitary Confinement
100%inclusion2 decks2 decks
98%synergy
Ghostly Prison
100%inclusion2 decks2 decks
78%synergy
Propaganda
100%inclusion2 decks2 decks
73%synergy
Darksteel Mutation
50%inclusion1 decks2 decks
44%synergy
Omen of the Sun
50%inclusion1 decks2 decks
50%synergy
Phyrexian Scriptures
50%inclusion1 decks2 decks
49%synergy
The Meathook Massacre
50%inclusion1 decks2 decks
47%synergy
Dance of the Dead
50%inclusion1 decks2 decks
48%synergy
The Birth of Meletis
50%inclusion1 decks2 decks
50%synergy
Tymaret Calls the Dead
50%inclusion1 decks2 decks
50%synergy
Ripples of Undeath
50%inclusion1 decks2 decks
47%synergy
Gadwick's First Duel
50%inclusion1 decks2 decks
50%synergy
Imprisoned in the Moon
50%inclusion1 decks2 decks
43%synergy
Mana Chains
50%inclusion1 decks2 decks
50%synergy
Fall of the Thran
50%inclusion1 decks2 decks
50%synergy
King Narfi's Betrayal
50%inclusion1 decks2 decks
50%synergy
Unable to Scream
50%inclusion1 decks2 decks
49%synergy
Compulsion
50%inclusion1 decks2 decks
50%synergy
Elspeth Conquers Death
50%inclusion1 decks2 decks
49%synergy
Omen of the Sea
50%inclusion1 decks2 decks
49%synergy
Illness in the Ranks
50%inclusion1 decks2 decks
50%synergy
Soul Snare
50%inclusion1 decks2 decks
50%synergy
Authority of the Consuls
50%inclusion1 decks2 decks
38%synergy
Hopeless Nightmare
50%inclusion1 decks2 decks
50%synergy
Necromancy
50%inclusion1 decks2 decks
45%synergy
The Phasing of Zhalfir
50%inclusion1 decks2 decks
50%synergy
Curse of Death's Hold
50%inclusion1 decks2 decks
50%synergy
Seal of Doom
50%inclusion1 decks2 decks
50%synergy
The Raven's Warning
50%inclusion1 decks2 decks
50%synergy
Mirrormade
50%inclusion1 decks2 decks
40%synergy
The Creation of Avacyn
50%inclusion1 decks2 decks
50%synergy
Estrid's Invocation
50%inclusion1 decks2 decks
45%synergy
Starfield of Nyx
50%inclusion1 decks2 decks
46%synergy
Michiko's Reign of Truth
50%inclusion1 decks2 decks
49%synergy
The Restoration of Eiganjo
50%inclusion1 decks2 decks
49%synergy
Trial of a Time Lord
50%inclusion1 decks2 decks
49%synergy
Seal of Cleansing
50%inclusion1 decks2 decks
49%synergy
Curator's Ward
50%inclusion1 decks2 decks
47%synergy
Scroll of Isildur
50%inclusion1 decks2 decks
50%synergy
Mind Harness
50%inclusion1 decks2 decks
50%synergy
Animate Dead
50%inclusion1 decks2 decks
40%synergy
Curse of Verbosity
50%inclusion1 decks2 decks
49%synergy
Tamiyo Meets the Story Circle
50%inclusion1 decks2 decks
50%synergy
Bloodchief Ascension
50%inclusion1 decks2 decks
45%synergy
Doom Foretold
50%inclusion1 decks2 decks
50%synergy
Medomai's Prophecy
50%inclusion1 decks2 decks
50%synergy
Battles
Invasion of Fiora
50%inclusion1 decks2 decks
50%synergy
Planeswalkers
Teferi, Time Raveler
50%inclusion1 decks2 decks
42%synergy
Utility Lands
Hall of Heliod's Generosity
50%inclusion1 decks2 decks
37%synergy
Halimar Depths
50%inclusion1 decks2 decks
45%synergy
Urza's Saga
50%inclusion1 decks2 decks
38%synergy
Command Beacon
50%inclusion1 decks2 decks
47%synergy
Reliquary Tower
50%inclusion1 decks2 decks
16%synergy
Monumental Henge
50%inclusion1 decks2 decks
49%synergy
Temple of the False God
50%inclusion1 decks2 decks
42%synergy
Nesting Grounds
50%inclusion1 decks2 decks
49%synergy
Mana Artifacts
Arcane Signet
100%inclusion2 decks2 decks
12%synergy
Sol Ring
100%inclusion2 decks2 decks
10%synergy
Talisman of Progress
50%inclusion1 decks2 decks
7%synergy
Talisman of Dominance
50%inclusion1 decks2 decks
0%synergy
Basalt Monolith
50%inclusion1 decks2 decks
48%synergy
Dimir Signet
50%inclusion1 decks2 decks
18%synergy
Fellwar Stone
50%inclusion1 decks2 decks
16%synergy
Talisman of Hierarchy
50%inclusion1 decks2 decks
6%synergy
Orzhov Signet
50%inclusion1 decks2 decks
17%synergy
Azorius Signet
50%inclusion1 decks2 decks
19%synergy
Lands
Command Tower
100%inclusion2 decks2 decks
7%synergy
Caves of Koilos
100%inclusion2 decks2 decks
65%synergy
Swamp
100%inclusion2 decks2 decks
9%synergy
Godless Shrine
100%inclusion2 decks2 decks
49%synergy
Underground River
100%inclusion2 decks2 decks
67%synergy
Island
100%inclusion2 decks2 decks
7%synergy
Plains
100%inclusion2 decks2 decks
8%synergy
Marsh Flats
100%inclusion2 decks2 decks
64%synergy
Hallowed Fountain
100%inclusion2 decks2 decks
50%synergy
Watery Grave
100%inclusion2 decks2 decks
50%synergy
Starting Town
100%inclusion1 decks1 decks
96%synergy
Undercity Sewers
50%inclusion1 decks2 decks
36%synergy
Misty Rainforest
50%inclusion1 decks2 decks
39%synergy
Fabled Passage
50%inclusion1 decks2 decks
43%synergy
Terramorphic Expanse
50%inclusion1 decks2 decks
34%synergy
Shadowy Backstreet
50%inclusion1 decks2 decks
37%synergy
Windswept Heath
50%inclusion1 decks2 decks
40%synergy
Fetid Heath
50%inclusion1 decks2 decks
38%synergy
Wooded Foothills
50%inclusion1 decks2 decks
50%synergy
Sea of Clouds
50%inclusion1 decks2 decks
15%synergy
Verdant Catacombs
50%inclusion1 decks2 decks
40%synergy
Raffine's Tower
50%inclusion1 decks2 decks
9%synergy
Orzhov Basilica
50%inclusion1 decks2 decks
34%synergy
Morphic Pool
50%inclusion1 decks2 decks
16%synergy
Arid Mesa
50%inclusion1 decks2 decks
40%synergy
Shattered Sanctum
50%inclusion1 decks2 decks
34%synergy
Scalding Tarn
50%inclusion1 decks2 decks
39%synergy
Meticulous Archive
50%inclusion1 decks2 decks
36%synergy
Adarkar Wastes
50%inclusion1 decks2 decks
19%synergy
Nimbus Maze
50%inclusion1 decks2 decks
48%synergy
Mystic Gate
50%inclusion1 decks2 decks
45%synergy
Vault of Champions
50%inclusion1 decks2 decks
17%synergy
Polluted Delta
50%inclusion1 decks2 decks
12%synergy
Deserted Beach
50%inclusion1 decks2 decks
29%synergy
City of Brass
50%inclusion1 decks2 decks
35%synergy
Flooded Strand
50%inclusion1 decks2 decks
12%synergy
Bloodstained Mire
50%inclusion1 decks2 decks
39%synergy
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