The Master of Keys (Commander) - Expensive Upgraded Mill

The Master of Keys
Rank #315
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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Creatures
Instants
Sorceries
Utility Artifacts
Enchantments
Utility Lands
Mana Artifacts
Lands
Back to Top
Smothering Tithe
67%inclusion2 decks3 decks
34%synergy
Imperial Seal
33%inclusion1 decks3 decks
26%synergy
Thassa's Oracle
33%inclusion1 decks3 decks
23%synergy
Consecrated Sphinx
33%inclusion1 decks3 decks
27%synergy
The One Ring
33%inclusion1 decks3 decks
20%synergy
Rhystic Study
33%inclusion1 decks3 decks
1%synergy
Creatures
Starfield Mystic
100%inclusion3 decks3 decks
93%synergy
Demon of Fate's Design
100%inclusion3 decks3 decks
94%synergy
Mesa Enchantress
100%inclusion3 decks3 decks
91%synergy
Fear of Sleep Paralysis
100%inclusion3 decks3 decks
94%synergy
Entity Tracker
100%inclusion3 decks3 decks
93%synergy
Ondu Spiritdancer
100%inclusion3 decks3 decks
94%synergy
Gravebreaker Lamia
67%inclusion2 decks3 decks
66%synergy
Inquisitive Glimmer
67%inclusion2 decks3 decks
59%synergy
Fear of Impostors
67%inclusion2 decks3 decks
65%synergy
Silent Hallcreeper
67%inclusion2 decks3 decks
62%synergy
Victor, Valgavoth's Seneschal
67%inclusion2 decks3 decks
65%synergy
Enduring Curiosity
67%inclusion2 decks3 decks
59%synergy
Ghostly Dancers
67%inclusion2 decks3 decks
64%synergy
Zur, Eternal Schemer
67%inclusion2 decks3 decks
63%synergy
Starnheim Courser
33%inclusion1 decks3 decks
29%synergy
Stenn, Paranoid Partisan
33%inclusion1 decks3 decks
32%synergy
Lotho, Corrupt Shirriff
33%inclusion1 decks3 decks
17%synergy
Scrabbling Skullcrab
33%inclusion1 decks3 decks
32%synergy
Fear of Surveillance
33%inclusion1 decks3 decks
33%synergy
Esper Sentinel
33%inclusion1 decks3 decks
6%synergy
Sage of Mysteries
33%inclusion1 decks3 decks
33%synergy
Overlord of the Balemurk
33%inclusion1 decks3 decks
31%synergy
Vilis, Broker of Blood
33%inclusion1 decks3 decks
32%synergy
Overlord of the Mistmoors
33%inclusion1 decks3 decks
31%synergy
Moon-Blessed Cleric
33%inclusion1 decks3 decks
29%synergy
Alela, Artful Provocateur
33%inclusion1 decks3 decks
30%synergy
Enduring Tenacity
33%inclusion1 decks3 decks
26%synergy
Skullsnap Nuisance
33%inclusion1 decks3 decks
33%synergy
Athreos, Shroud-Veiled
33%inclusion1 decks3 decks
29%synergy
Crypt Ghast
33%inclusion1 decks3 decks
33%synergy
Gremlin Tamer
33%inclusion1 decks3 decks
32%synergy
Nashi, Searcher in the Dark
33%inclusion1 decks3 decks
33%synergy
Neerdiv, Devious Diver
33%inclusion1 decks3 decks
33%synergy
Doomwake Giant
33%inclusion1 decks3 decks
27%synergy
Aminatou, Veil Piercer
33%inclusion1 decks3 decks
32%synergy
Grim Guardian
33%inclusion1 decks3 decks
31%synergy
Hullbreaker Horror
33%inclusion1 decks3 decks
27%synergy
Zur the Enchanter
33%inclusion1 decks3 decks
28%synergy
Ledger Shredder
33%inclusion1 decks3 decks
24%synergy
Ghostly Keybearer
33%inclusion1 decks3 decks
33%synergy
Mindwrack Harpy
33%inclusion1 decks3 decks
33%synergy
Instants
An Offer You Can't Refuse
67%inclusion2 decks3 decks
40%synergy
Swan Song
67%inclusion2 decks3 decks
47%synergy
Arcane Denial
67%inclusion2 decks3 decks
46%synergy
Swords to Plowshares
67%inclusion2 decks3 decks
-2%synergy
Entomb
33%inclusion1 decks3 decks
26%synergy
Negate
33%inclusion1 decks3 decks
17%synergy
Eerie Interference
33%inclusion1 decks3 decks
33%synergy
Dark Ritual
33%inclusion1 decks3 decks
14%synergy
Cabal Ritual
33%inclusion1 decks3 decks
30%synergy
Void Rend
33%inclusion1 decks3 decks
0%synergy
Seized from Slumber
33%inclusion1 decks3 decks
33%synergy
Strix Serenade
33%inclusion1 decks3 decks
30%synergy
Perplex
33%inclusion1 decks3 decks
32%synergy
Counterspell
33%inclusion1 decks3 decks
-8%synergy
Path to Exile
33%inclusion1 decks3 decks
-9%synergy
Generous Gift
33%inclusion1 decks3 decks
19%synergy
Withering Torment
33%inclusion1 decks3 decks
32%synergy
Sorceries
Sevinne's Reclamation
67%inclusion2 decks3 decks
58%synergy
Reanimate
67%inclusion2 decks3 decks
51%synergy
Redress Fate
67%inclusion2 decks3 decks
60%synergy
Ponder
33%inclusion1 decks3 decks
24%synergy
Commune with Evil
33%inclusion1 decks3 decks
33%synergy
Lively Dirge
33%inclusion1 decks3 decks
32%synergy
Tranquilize
33%inclusion1 decks3 decks
33%synergy
Wrath of God
33%inclusion1 decks3 decks
29%synergy
Farewell
33%inclusion1 decks3 decks
20%synergy
Glimpse the Unthinkable
33%inclusion1 decks3 decks
33%synergy
Extinguish All Hope
33%inclusion1 decks3 decks
32%synergy
Portent
33%inclusion1 decks3 decks
30%synergy
Dance of the Manse
33%inclusion1 decks3 decks
30%synergy
Utility Artifacts
Chimil, the Inner Sun
33%inclusion1 decks3 decks
32%synergy
Cloud Key
33%inclusion1 decks3 decks
30%synergy
Lightning Greaves
33%inclusion1 decks3 decks
11%synergy
Enchantments
Ripples of Undeath
67%inclusion2 decks3 decks
64%synergy
Sigil of the Empty Throne
67%inclusion2 decks3 decks
61%synergy
Mirrormade
67%inclusion2 decks3 decks
57%synergy
Sphere of Safety
67%inclusion2 decks3 decks
57%synergy
Amphibian Downpour
67%inclusion2 decks3 decks
62%synergy
Secrets of the Dead
67%inclusion2 decks3 decks
66%synergy
Animate Dead
67%inclusion2 decks3 decks
57%synergy
Dress Down
67%inclusion2 decks3 decks
64%synergy
Dazzling Theater // Prop Room
67%inclusion2 decks3 decks
65%synergy
Secret Arcade // Dusty Parlor
67%inclusion2 decks3 decks
61%synergy
Polluted Cistern // Dim Oubliette
67%inclusion2 decks3 decks
66%synergy
Propaganda
67%inclusion2 decks3 decks
40%synergy
Defiled Crypt // Cadaver Lab
67%inclusion2 decks3 decks
66%synergy
One with the Multiverse
33%inclusion1 decks3 decks
29%synergy
The Meathook Massacre
33%inclusion1 decks3 decks
30%synergy
Polluted Bonds
33%inclusion1 decks3 decks
32%synergy
Dance of the Dead
33%inclusion1 decks3 decks
31%synergy
Grasp of Fate
33%inclusion1 decks3 decks
27%synergy
Cacophony Unleashed
33%inclusion1 decks3 decks
32%synergy
Unable to Scream
33%inclusion1 decks3 decks
32%synergy
Shardmage's Rescue
33%inclusion1 decks3 decks
33%synergy
Out of the Tombs
33%inclusion1 decks3 decks
33%synergy
Grievous Wound
33%inclusion1 decks3 decks
32%synergy
Touch the Spirit Realm
33%inclusion1 decks3 decks
31%synergy
Authority of the Consuls
33%inclusion1 decks3 decks
22%synergy
Blind Obedience
33%inclusion1 decks3 decks
21%synergy
Necromancy
33%inclusion1 decks3 decks
29%synergy
Omniscience
33%inclusion1 decks3 decks
30%synergy
Estrid's Invocation
33%inclusion1 decks3 decks
29%synergy
Copy Enchantment
33%inclusion1 decks3 decks
29%synergy
Coastal Piracy
33%inclusion1 decks3 decks
31%synergy
Timely Ward
33%inclusion1 decks3 decks
28%synergy
Central Elevator // Promising Stairs
33%inclusion1 decks3 decks
33%synergy
The Tale of Tamiyo
33%inclusion1 decks3 decks
33%synergy
Leyline of Anticipation
33%inclusion1 decks3 decks
29%synergy
Funeral Room // Awakening Hall
33%inclusion1 decks3 decks
32%synergy
Seal of Cleansing
33%inclusion1 decks3 decks
32%synergy
Monologue Tax
33%inclusion1 decks3 decks
27%synergy
Restricted Office // Lecture Hall
33%inclusion1 decks3 decks
31%synergy
Bottomless Pool // Locker Room
33%inclusion1 decks3 decks
31%synergy
The Bath Song
33%inclusion1 decks3 decks
33%synergy
Unholy Annex // Ritual Chamber
33%inclusion1 decks3 decks
33%synergy
Painful Quandary
33%inclusion1 decks3 decks
31%synergy
Enchanted Evening
33%inclusion1 decks3 decks
32%synergy
Oubliette
33%inclusion1 decks3 decks
32%synergy
Spirit Link
33%inclusion1 decks3 decks
33%synergy
Nowhere to Run
33%inclusion1 decks3 decks
32%synergy
Hallowed Haunting
33%inclusion1 decks3 decks
31%synergy
Mirror Room // Fractured Realm
33%inclusion1 decks3 decks
31%synergy
Ghostly Prison
33%inclusion1 decks3 decks
12%synergy
Utility Lands
Hall of Heliod's Generosity
67%inclusion2 decks3 decks
54%synergy
Minamo, School at Water's Edge
33%inclusion1 decks3 decks
29%synergy
Reliquary Tower
33%inclusion1 decks3 decks
0%synergy
Cephalid Coliseum
33%inclusion1 decks3 decks
30%synergy
Otawara, Soaring City
33%inclusion1 decks3 decks
14%synergy
Mana Artifacts
Arcane Signet
100%inclusion3 decks3 decks
12%synergy
Sol Ring
100%inclusion3 decks3 decks
10%synergy
Talisman of Progress
67%inclusion2 decks3 decks
24%synergy
Talisman of Dominance
67%inclusion2 decks3 decks
18%synergy
Talisman of Hierarchy
67%inclusion2 decks3 decks
24%synergy
Azorius Signet
67%inclusion2 decks3 decks
34%synergy
Commander's Sphere
33%inclusion1 decks3 decks
14%synergy
Dimir Signet
33%inclusion1 decks3 decks
1%synergy
Thought Vessel
33%inclusion1 decks3 decks
9%synergy
Springleaf Drum
33%inclusion1 decks3 decks
32%synergy
Orzhov Signet
33%inclusion1 decks3 decks
-1%synergy
Lands
Tundra
100%inclusion3 decks3 decks
84%synergy
Command Tower
100%inclusion3 decks3 decks
8%synergy
Exotic Orchard
100%inclusion3 decks3 decks
42%synergy
Underground Sea
100%inclusion3 decks3 decks
84%synergy
Swamp
100%inclusion3 decks3 decks
9%synergy
Godless Shrine
100%inclusion3 decks3 decks
50%synergy
Island
100%inclusion3 decks3 decks
7%synergy
Plains
100%inclusion3 decks3 decks
9%synergy
Scrubland
100%inclusion3 decks3 decks
84%synergy
Mana Confluence
100%inclusion3 decks3 decks
86%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
Undercity Sewers
67%inclusion2 decks3 decks
53%synergy
Misty Rainforest
67%inclusion2 decks3 decks
55%synergy
Sea of Clouds
67%inclusion2 decks3 decks
31%synergy
Morphic Pool
67%inclusion2 decks3 decks
32%synergy
Arid Mesa
67%inclusion2 decks3 decks
57%synergy
Meticulous Archive
67%inclusion2 decks3 decks
53%synergy
Vault of Champions
67%inclusion2 decks3 decks
34%synergy
City of Brass
67%inclusion2 decks3 decks
52%synergy
Bloodstained Mire
67%inclusion2 decks3 decks
56%synergy
Prismatic Vista
33%inclusion1 decks3 decks
29%synergy
Shadowy Backstreet
33%inclusion1 decks3 decks
21%synergy
Windswept Heath
33%inclusion1 decks3 decks
23%synergy
Bleachbone Verge
33%inclusion1 decks3 decks
25%synergy
Caves of Koilos
33%inclusion1 decks3 decks
-2%synergy
Valgavoth's Lair
33%inclusion1 decks3 decks
30%synergy
Verdant Catacombs
33%inclusion1 decks3 decks
23%synergy
Raffine's Tower
33%inclusion1 decks3 decks
-8%synergy
Arcane Sanctum
33%inclusion1 decks3 decks
-21%synergy
Underground River
33%inclusion1 decks3 decks
1%synergy
Evolving Wilds
33%inclusion1 decks3 decks
8%synergy
Gemstone Caverns
33%inclusion1 decks3 decks
26%synergy
Scalding Tarn
33%inclusion1 decks3 decks
22%synergy
Adarkar Wastes
33%inclusion1 decks3 decks
3%synergy
Gloomlake Verge
33%inclusion1 decks3 decks
22%synergy
Floodfarm Verge
33%inclusion1 decks3 decks
22%synergy
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