The Master of Keys (Commander) - Expensive Upgraded Mill

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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Enchantments
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Utility Lands
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Eiganjo Dynastorian
100%inclusion1 decks1 decks
100%synergy
Turbulent Moor
100%inclusion1 decks1 decks
99%synergy
Changing Loyalty
100%inclusion1 decks1 decks
100%synergy
Does Machines
50%inclusion1 decks2 decks
50%synergy
High Synergy Cards
Entity Tracker
100%inclusion4 decks4 decks
94%synergy
Mesa Enchantress
100%inclusion4 decks4 decks
91%synergy
Game Changers
Smothering Tithe
25%inclusion1 decks4 decks
-6%synergy
Imperial Seal
25%inclusion1 decks4 decks
18%synergy
Ancient Tomb
25%inclusion1 decks4 decks
12%synergy
Consecrated Sphinx
25%inclusion1 decks4 decks
19%synergy
Serra's Sanctum
25%inclusion1 decks4 decks
23%synergy
The One Ring
25%inclusion1 decks4 decks
12%synergy
Gifts Ungiven
25%inclusion1 decks4 decks
22%synergy
Mana Vault
25%inclusion1 decks4 decks
16%synergy
Creatures
Starfield Mystic
75%inclusion3 decks4 decks
68%synergy
Gravebreaker Lamia
75%inclusion3 decks4 decks
74%synergy
Inquisitive Glimmer
75%inclusion3 decks4 decks
68%synergy
Demon of Fate's Design
75%inclusion3 decks4 decks
70%synergy
Fear of Impostors
75%inclusion3 decks4 decks
74%synergy
Witch Enchanter
50%inclusion2 decks4 decks
43%synergy
Stenn, Paranoid Partisan
50%inclusion2 decks4 decks
49%synergy
Scrabbling Skullcrab
50%inclusion2 decks4 decks
49%synergy
Sage of Mysteries
50%inclusion2 decks4 decks
50%synergy
Enduring Curiosity
50%inclusion2 decks4 decks
42%synergy
Fear of Sleep Paralysis
50%inclusion2 decks4 decks
45%synergy
Ondu Spiritdancer
50%inclusion2 decks4 decks
44%synergy
Zur the Enchanter
50%inclusion2 decks4 decks
45%synergy
Starfield Vocalist
33%inclusion1 decks3 decks
32%synergy
Mister Negative
33%inclusion1 decks3 decks
33%synergy
Starnheim Courser
25%inclusion1 decks4 decks
21%synergy
Heliod's Pilgrim
25%inclusion1 decks4 decks
24%synergy
Lotho, Corrupt Shirriff
25%inclusion1 decks4 decks
8%synergy
Light-Paws, Emperor's Voice
25%inclusion1 decks4 decks
24%synergy
Gray Merchant of Asphodel
25%inclusion1 decks4 decks
20%synergy
Defiler of Flesh
25%inclusion1 decks4 decks
25%synergy
Kami of False Hope
25%inclusion1 decks4 decks
25%synergy
Agent of Treachery
25%inclusion1 decks4 decks
23%synergy
Fear of Surveillance
25%inclusion1 decks4 decks
25%synergy
Esper Sentinel
25%inclusion1 decks4 decks
-2%synergy
Overlord of the Balemurk
25%inclusion1 decks4 decks
23%synergy
Silent Hallcreeper
25%inclusion1 decks4 decks
20%synergy
Hedron Crab
25%inclusion1 decks4 decks
24%synergy
Boonweaver Giant
25%inclusion1 decks4 decks
25%synergy
Overlord of the Mistmoors
25%inclusion1 decks4 decks
23%synergy
Moon-Blessed Cleric
25%inclusion1 decks4 decks
20%synergy
Victor, Valgavoth's Seneschal
25%inclusion1 decks4 decks
23%synergy
Alela, Artful Provocateur
25%inclusion1 decks4 decks
22%synergy
Enduring Tenacity
25%inclusion1 decks4 decks
17%synergy
Skullsnap Nuisance
25%inclusion1 decks4 decks
25%synergy
Athreos, Shroud-Veiled
25%inclusion1 decks4 decks
21%synergy
Pearl-Ear, Imperial Advisor
25%inclusion1 decks4 decks
23%synergy
Crypt Ghast
25%inclusion1 decks4 decks
24%synergy
Gremlin Tamer
25%inclusion1 decks4 decks
24%synergy
Stormscape Familiar
25%inclusion1 decks4 decks
22%synergy
Warren Soultrader
25%inclusion1 decks4 decks
21%synergy
Nashi, Searcher in the Dark
25%inclusion1 decks4 decks
24%synergy
Neerdiv, Devious Diver
25%inclusion1 decks4 decks
25%synergy
Doomwake Giant
25%inclusion1 decks4 decks
19%synergy
Aminatou, Veil Piercer
25%inclusion1 decks4 decks
24%synergy
Heliod, the Radiant Dawn
25%inclusion1 decks4 decks
21%synergy
Ghostly Dancers
25%inclusion1 decks4 decks
23%synergy
Abdel Adrian, Gorion's Ward
25%inclusion1 decks4 decks
23%synergy
Zur, Eternal Schemer
25%inclusion1 decks4 decks
22%synergy
Alseid of Life's Bounty
25%inclusion1 decks4 decks
24%synergy
Instants
Entomb
75%inclusion3 decks4 decks
68%synergy
Cabal Ritual
50%inclusion2 decks4 decks
47%synergy
Swords to Plowshares
50%inclusion2 decks4 decks
-18%synergy
Fell the Profane
25%inclusion1 decks4 decks
16%synergy
An Offer You Can't Refuse
25%inclusion1 decks4 decks
-2%synergy
Negate
25%inclusion1 decks4 decks
9%synergy
Eerie Interference
25%inclusion1 decks4 decks
25%synergy
Brain Freeze
25%inclusion1 decks4 decks
24%synergy
Dark Ritual
25%inclusion1 decks4 decks
5%synergy
Seized from Slumber
25%inclusion1 decks4 decks
25%synergy
Strix Serenade
25%inclusion1 decks4 decks
21%synergy
Swan Song
25%inclusion1 decks4 decks
5%synergy
Perplex
25%inclusion1 decks4 decks
24%synergy
Malakir Rebirth
25%inclusion1 decks4 decks
21%synergy
Arcane Denial
25%inclusion1 decks4 decks
5%synergy
Sink into Stupor
25%inclusion1 decks4 decks
12%synergy
Path to Exile
25%inclusion1 decks4 decks
-17%synergy
Generous Gift
25%inclusion1 decks4 decks
11%synergy
Withering Torment
25%inclusion1 decks4 decks
23%synergy
Sorceries
Glimpse the Unthinkable
75%inclusion3 decks4 decks
75%synergy
Reanimate
50%inclusion2 decks4 decks
34%synergy
Ponder
25%inclusion1 decks4 decks
16%synergy
Commune with Evil
25%inclusion1 decks4 decks
25%synergy
Diabolic Intent
25%inclusion1 decks4 decks
20%synergy
Lively Dirge
25%inclusion1 decks4 decks
24%synergy
Resurgent Belief
25%inclusion1 decks4 decks
23%synergy
Tranquilize
25%inclusion1 decks4 decks
25%synergy
Sevinne's Reclamation
25%inclusion1 decks4 decks
16%synergy
Sea Gate Restoration
25%inclusion1 decks4 decks
22%synergy
Buried Alive
25%inclusion1 decks4 decks
21%synergy
Extinguish All Hope
25%inclusion1 decks4 decks
23%synergy
Beseech the Mirror
25%inclusion1 decks4 decks
21%synergy
Portent
25%inclusion1 decks4 decks
22%synergy
Redress Fate
25%inclusion1 decks4 decks
19%synergy
Utility Artifacts
Mesmeric Orb
25%inclusion1 decks4 decks
24%synergy
Chimil, the Inner Sun
25%inclusion1 decks4 decks
24%synergy
Cloud Key
25%inclusion1 decks4 decks
22%synergy
Enchantments
Ripples of Undeath
75%inclusion3 decks4 decks
72%synergy
Necromancy
75%inclusion3 decks4 decks
70%synergy
Sphere of Safety
75%inclusion3 decks4 decks
66%synergy
Animate Dead
75%inclusion3 decks4 decks
65%synergy
Dance of the Dead
50%inclusion2 decks4 decks
48%synergy
Out of the Tombs
50%inclusion2 decks4 decks
50%synergy
Omniscience
50%inclusion2 decks4 decks
46%synergy
Leyline of Anticipation
50%inclusion2 decks4 decks
46%synergy
Amphibian Downpour
50%inclusion2 decks4 decks
45%synergy
Seal of Cleansing
50%inclusion2 decks4 decks
49%synergy
Dress Down
50%inclusion2 decks4 decks
48%synergy
Dazzling Theater // Prop Room
50%inclusion2 decks4 decks
49%synergy
Stillness in Motion
50%inclusion2 decks4 decks
50%synergy
Nowhere to Run
50%inclusion2 decks4 decks
49%synergy
Propaganda
50%inclusion2 decks4 decks
22%synergy
Defiled Crypt // Cadaver Lab
50%inclusion2 decks4 decks
49%synergy
Aang's Iceberg
33%inclusion1 decks3 decks
33%synergy
Darksteel Mutation
25%inclusion1 decks4 decks
19%synergy
One with the Multiverse
25%inclusion1 decks4 decks
20%synergy
Momentum Breaker
25%inclusion1 decks4 decks
25%synergy
Parallax Wave
25%inclusion1 decks4 decks
25%synergy
Lunarch Mantle
25%inclusion1 decks4 decks
25%synergy
Polluted Bonds
25%inclusion1 decks4 decks
24%synergy
Grasp of Fate
25%inclusion1 decks4 decks
19%synergy
Cacophony Unleashed
25%inclusion1 decks4 decks
23%synergy
Songbirds' Blessing
25%inclusion1 decks4 decks
24%synergy
Dark Privilege
25%inclusion1 decks4 decks
25%synergy
Court of Cunning
25%inclusion1 decks4 decks
24%synergy
Imprisoned in the Moon
25%inclusion1 decks4 decks
18%synergy
Sigil of the Empty Throne
25%inclusion1 decks4 decks
19%synergy
Unable to Scream
25%inclusion1 decks4 decks
24%synergy
Shardmage's Rescue
25%inclusion1 decks4 decks
25%synergy
Moat
25%inclusion1 decks4 decks
25%synergy
Mystic Veil
25%inclusion1 decks4 decks
25%synergy
Chronic Flooding
25%inclusion1 decks4 decks
25%synergy
Leyline of Sanctity
25%inclusion1 decks4 decks
24%synergy
Grievous Wound
25%inclusion1 decks4 decks
24%synergy
Life Insurance
25%inclusion1 decks4 decks
24%synergy
Soul Snare
25%inclusion1 decks4 decks
25%synergy
Blind Obedience
25%inclusion1 decks4 decks
13%synergy
Case of the Stashed Skeleton
25%inclusion1 decks4 decks
25%synergy
Dance of Many
25%inclusion1 decks4 decks
25%synergy
Mantle of the Ancients
25%inclusion1 decks4 decks
22%synergy
Mirrormade
25%inclusion1 decks4 decks
15%synergy
Estrid's Invocation
25%inclusion1 decks4 decks
20%synergy
Blood Funnel
25%inclusion1 decks4 decks
25%synergy
Out of Time
25%inclusion1 decks4 decks
24%synergy
Copy Enchantment
25%inclusion1 decks4 decks
20%synergy
Coastal Piracy
25%inclusion1 decks4 decks
23%synergy
Forbidden Crypt
25%inclusion1 decks4 decks
25%synergy
Planeswalkers
Jace, the Perfected Mind
50%inclusion2 decks4 decks
50%synergy
Utility Lands
Minamo, School at Water's Edge
25%inclusion1 decks4 decks
21%synergy
Phyrexian Tower
25%inclusion1 decks4 decks
21%synergy
Hall of Heliod's Generosity
25%inclusion1 decks4 decks
12%synergy
Urza's Saga
25%inclusion1 decks4 decks
13%synergy
Spymaster's Vault
25%inclusion1 decks4 decks
23%synergy
Nykthos, Shrine to Nyx
25%inclusion1 decks4 decks
24%synergy
Urborg, Tomb of Yawgmoth
25%inclusion1 decks4 decks
12%synergy
Otawara, Soaring City
25%inclusion1 decks4 decks
6%synergy
Mana Artifacts
Sol Ring
100%inclusion4 decks4 decks
10%synergy
Arcane Signet
75%inclusion3 decks4 decks
-13%synergy
Talisman of Progress
25%inclusion1 decks4 decks
-19%synergy
Commander's Sphere
25%inclusion1 decks4 decks
7%synergy
Talisman of Dominance
25%inclusion1 decks4 decks
-25%synergy
Talisman of Hierarchy
25%inclusion1 decks4 decks
-19%synergy
Springleaf Drum
25%inclusion1 decks4 decks
23%synergy
Azorius Signet
25%inclusion1 decks4 decks
-6%synergy
Lands
Tundra
100%inclusion4 decks4 decks
84%synergy
Command Tower
100%inclusion4 decks4 decks
7%synergy
Exotic Orchard
100%inclusion4 decks4 decks
41%synergy
Underground Sea
100%inclusion4 decks4 decks
84%synergy
Godless Shrine
100%inclusion4 decks4 decks
49%synergy
Arid Mesa
100%inclusion4 decks4 decks
90%synergy
Scrubland
100%inclusion4 decks4 decks
84%synergy
Marsh Flats
100%inclusion4 decks4 decks
64%synergy
Polluted Delta
100%inclusion4 decks4 decks
62%synergy
Hallowed Fountain
100%inclusion4 decks4 decks
50%synergy
Flooded Strand
100%inclusion4 decks4 decks
62%synergy
Watery Grave
100%inclusion4 decks4 decks
49%synergy
Undercity Sewers
75%inclusion3 decks4 decks
60%synergy
Misty Rainforest
75%inclusion3 decks4 decks
64%synergy
Shadowy Backstreet
75%inclusion3 decks4 decks
62%synergy
Windswept Heath
75%inclusion3 decks4 decks
65%synergy
Swamp
75%inclusion3 decks4 decks
-17%synergy
Sea of Clouds
75%inclusion3 decks4 decks
40%synergy
Island
75%inclusion3 decks4 decks
-18%synergy
Plains
75%inclusion3 decks4 decks
-17%synergy
Morphic Pool
75%inclusion3 decks4 decks
41%synergy
Scalding Tarn
75%inclusion3 decks4 decks
64%synergy
Meticulous Archive
75%inclusion3 decks4 decks
61%synergy
Mana Confluence
75%inclusion3 decks4 decks
61%synergy
Vault of Champions
75%inclusion3 decks4 decks
43%synergy
City of Brass
75%inclusion3 decks4 decks
60%synergy
Bloodstained Mire
75%inclusion3 decks4 decks
64%synergy
Witch Enchanter
50%inclusion2 decks4 decks
43%synergy
Verdant Catacombs
50%inclusion2 decks4 decks
40%synergy
Raffine's Tower
50%inclusion2 decks4 decks
9%synergy
Isolated Chapel
50%inclusion2 decks4 decks
9%synergy
Glacial Fortress
25%inclusion1 decks4 decks
-17%synergy
Prismatic Vista
25%inclusion1 decks4 decks
21%synergy
Fell the Profane
25%inclusion1 decks4 decks
16%synergy
Bleachbone Verge
25%inclusion1 decks4 decks
16%synergy
Caves of Koilos
25%inclusion1 decks4 decks
-11%synergy
Sea Gate Restoration
25%inclusion1 decks4 decks
22%synergy
Shipwreck Marsh
25%inclusion1 decks4 decks
4%synergy
Valgavoth's Lair
25%inclusion1 decks4 decks
22%synergy
Reflecting Pool
25%inclusion1 decks4 decks
17%synergy
Drowned Catacomb
25%inclusion1 decks4 decks
-12%synergy
Underground River
25%inclusion1 decks4 decks
-9%synergy
Malakir Rebirth
25%inclusion1 decks4 decks
21%synergy
Snow-Covered Plains
25%inclusion1 decks4 decks
22%synergy
Sink into Stupor
25%inclusion1 decks4 decks
12%synergy
Shattered Sanctum
25%inclusion1 decks4 decks
9%synergy
Gloomlake Verge
25%inclusion1 decks4 decks
14%synergy
Snow-Covered Swamp
25%inclusion1 decks4 decks
22%synergy
Deserted Beach
25%inclusion1 decks4 decks
4%synergy
Floodfarm Verge
25%inclusion1 decks4 decks
14%synergy
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