The Master of Keys (Commander) - Expensive 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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Wan Shi Tong, Librarian
100%inclusion3 decks3 decks
96%synergy
High Synergy Cards
Necromancy
100%inclusion27 decks27 decks
95%synergy
Abdel Adrian, Gorion's Ward
93%inclusion25 decks27 decks
91%synergy
Dance of the Dead
93%inclusion25 decks27 decks
90%synergy
Silence
100%inclusion27 decks27 decks
90%synergy
Tainted Pact
96%inclusion26 decks27 decks
89%synergy
Intuition
89%inclusion24 decks27 decks
87%synergy
Animate Dead
96%inclusion26 decks27 decks
86%synergy
Dress Down
89%inclusion24 decks27 decks
86%synergy
Entomb
93%inclusion25 decks27 decks
86%synergy
Pact of Negation
93%inclusion25 decks27 decks
84%synergy
Top Cards
Dark Ritual
100%inclusion27 decks27 decks
81%synergy
Esper Sentinel
100%inclusion27 decks27 decks
72%synergy
Mystic Remora
100%inclusion27 decks27 decks
78%synergy
Force of Negation
96%inclusion26 decks27 decks
84%synergy
Flusterstorm
93%inclusion25 decks27 decks
84%synergy
Orcish Bowmasters
93%inclusion25 decks27 decks
81%synergy
Smothering Tithe
89%inclusion24 decks27 decks
56%synergy
Sevinne's Reclamation
89%inclusion24 decks27 decks
80%synergy
Mindbreak Trap
89%inclusion24 decks27 decks
82%synergy
Demonic Consultation
89%inclusion24 decks27 decks
80%synergy
Game Changers
Ancient Tomb
100%inclusion27 decks27 decks
87%synergy
Demonic Tutor
100%inclusion27 decks27 decks
78%synergy
Force of Will
100%inclusion27 decks27 decks
87%synergy
Enlightened Tutor
100%inclusion27 decks27 decks
80%synergy
Vampiric Tutor
100%inclusion27 decks27 decks
82%synergy
Mox Diamond
100%inclusion27 decks27 decks
93%synergy
Thassa's Oracle
96%inclusion26 decks27 decks
86%synergy
Rhystic Study
96%inclusion26 decks27 decks
64%synergy
Mana Vault
96%inclusion26 decks27 decks
87%synergy
Chrome Mox
96%inclusion26 decks27 decks
86%synergy
Creatures
Grand Abolisher
89%inclusion24 decks27 decks
74%synergy
Ranger-Captain of Eos
89%inclusion24 decks27 decks
82%synergy
Lotho, Corrupt Shirriff
81%inclusion22 decks27 decks
65%synergy
Valley Floodcaller
56%inclusion15 decks27 decks
51%synergy
Voice of Victory
50%inclusion7 decks14 decks
42%synergy
Mockingbird
48%inclusion13 decks27 decks
44%synergy
Displacer Kitten
44%inclusion12 decks27 decks
37%synergy
Opposition Agent
44%inclusion12 decks27 decks
35%synergy
Drannith Magistrate
44%inclusion12 decks27 decks
36%synergy
Archivist of Oghma
41%inclusion11 decks27 decks
34%synergy
Auriok Salvagers
41%inclusion11 decks27 decks
40%synergy
Hullbreaker Horror
37%inclusion10 decks27 decks
31%synergy
Lurrus of the Dream-Den
33%inclusion9 decks27 decks
32%synergy
Hedron Crab
33%inclusion9 decks27 decks
33%synergy
Ghostly Pilferer
30%inclusion8 decks27 decks
23%synergy
Psychic Frog
26%inclusion7 decks27 decks
19%synergy
Ledger Shredder
26%inclusion7 decks27 decks
17%synergy
Phyrexian Metamorph
22%inclusion6 decks27 decks
13%synergy
Talion, the Kindly Lord
22%inclusion6 decks27 decks
14%synergy
Snapcaster Mage
19%inclusion5 decks27 decks
17%synergy
Tataru Taru
18%inclusion2 decks11 decks
10%synergy
Leonin Relic-Warder
15%inclusion4 decks27 decks
15%synergy
Pollywog Prodigy
11%inclusion3 decks27 decks
7%synergy
Faerie Mastermind
11%inclusion3 decks27 decks
2%synergy
Dauthi Voidwalker
11%inclusion3 decks27 decks
5%synergy
Symbiote Spider-Man
11%inclusion1 decks9 decks
11%synergy
High Fae Trickster
10%inclusion2 decks21 decks
5%synergy
Volatile Stormdrake
7.4%inclusion2 decks27 decks
6%synergy
Hoarding Broodlord
7.4%inclusion2 decks27 decks
6%synergy
Consecrated Sphinx
7.4%inclusion2 decks27 decks
1%synergy
Cephalid Illusionist
7.4%inclusion2 decks27 decks
7%synergy
Gilded Drake
7.4%inclusion2 decks27 decks
6%synergy
Laboratory Maniac
7.4%inclusion2 decks27 decks
4%synergy
Nomads en-Kor
7.4%inclusion2 decks27 decks
7%synergy
Nezahal, Primal Tide
7.4%inclusion2 decks27 decks
4%synergy
Instants
Swan Song
85%inclusion23 decks27 decks
66%synergy
Mental Misstep
81%inclusion22 decks27 decks
74%synergy
Swords to Plowshares
81%inclusion22 decks27 decks
13%synergy
Mystical Tutor
81%inclusion22 decks27 decks
70%synergy
Borne Upon a Wind
78%inclusion21 decks27 decks
73%synergy
Fierce Guardianship
74%inclusion20 decks27 decks
53%synergy
Cabal Ritual
70%inclusion19 decks27 decks
67%synergy
Cyclonic Rift
59%inclusion16 decks27 decks
34%synergy
An Offer You Can't Refuse
44%inclusion12 decks27 decks
18%synergy
Chain of Vapor
41%inclusion11 decks27 decks
37%synergy
Gifts Ungiven
37%inclusion10 decks27 decks
35%synergy
Mana Drain
37%inclusion10 decks27 decks
19%synergy
Brain Freeze
30%inclusion8 decks27 decks
29%synergy
Retraction Helix
22%inclusion6 decks27 decks
21%synergy
Culling the Weak
22%inclusion6 decks27 decks
21%synergy
Darkblast
22%inclusion6 decks27 decks
22%synergy
Into the Flood Maw
22%inclusion6 decks27 decks
18%synergy
Ad Nauseam
19%inclusion5 decks27 decks
16%synergy
Path to Exile
19%inclusion5 decks27 decks
-23%synergy
Banishing Knack
15%inclusion4 decks27 decks
14%synergy
Strix Serenade
15%inclusion4 decks27 decks
11%synergy
Sink into Stupor
15%inclusion4 decks27 decks
2%synergy
Deadly Rollick
7.4%inclusion2 decks27 decks
-6%synergy
Sacrifice
7.4%inclusion2 decks27 decks
7%synergy
Muddle the Mixture
7.4%inclusion2 decks27 decks
3%synergy
Lim-Dûl's Vault
7.4%inclusion2 decks27 decks
4%synergy
Dramatic Reversal
7.4%inclusion2 decks27 decks
5%synergy
Saw in Half
7.4%inclusion2 decks27 decks
5%synergy
Sorceries
Imperial Seal
85%inclusion23 decks27 decks
77%synergy
Reanimate
56%inclusion15 decks27 decks
40%synergy
Unmarked Grave
26%inclusion7 decks27 decks
24%synergy
Mnemonic Betrayal
26%inclusion7 decks27 decks
23%synergy
Diabolic Intent
22%inclusion6 decks27 decks
17%synergy
Lively Dirge
22%inclusion6 decks27 decks
21%synergy
Toxic Deluge
22%inclusion6 decks27 decks
3%synergy
Cabal Therapy
19%inclusion5 decks27 decks
18%synergy
Demonic Counsel
19%inclusion5 decks27 decks
17%synergy
Windfall
15%inclusion4 decks27 decks
1%synergy
Beseech the Mirror
15%inclusion4 decks27 decks
11%synergy
Yawgmoth's Will
11%inclusion3 decks27 decks
10%synergy
Praetor's Grasp
11%inclusion3 decks27 decks
8%synergy
Timetwister
11%inclusion3 decks27 decks
10%synergy
Singularity Rupture
11%inclusion1 decks9 decks
9%synergy
Space-Time Anomaly
11%inclusion1 decks9 decks
9%synergy
Utility Artifacts
The One Ring
78%inclusion21 decks27 decks
64%synergy
Wishclaw Talisman
63%inclusion17 decks27 decks
55%synergy
Vexing Bauble
15%inclusion4 decks27 decks
13%synergy
Mesmeric Orb
11%inclusion3 decks27 decks
10%synergy
Agatha's Soul Cauldron
11%inclusion3 decks27 decks
11%synergy
Cursed Totem
7.4%inclusion2 decks27 decks
5%synergy
Altar of the Brood
7.4%inclusion2 decks27 decks
6%synergy
Isochron Scepter
7.4%inclusion2 decks27 decks
5%synergy
Enchantments
Amphibian Downpour
70%inclusion19 decks27 decks
66%synergy
Tinybones Joins Up
63%inclusion17 decks27 decks
62%synergy
Necropotence
63%inclusion17 decks27 decks
56%synergy
Blind Obedience
59%inclusion16 decks27 decks
47%synergy
The Meathook Massacre
41%inclusion11 decks27 decks
37%synergy
Ripples of Undeath
41%inclusion11 decks27 decks
38%synergy
Copy Artifact
41%inclusion11 decks27 decks
40%synergy
Touch the Spirit Realm
33%inclusion9 decks27 decks
31%synergy
Steal Enchantment
33%inclusion9 decks27 decks
32%synergy
Counterbalance
30%inclusion8 decks27 decks
28%synergy
Founding the Third Path
30%inclusion8 decks27 decks
29%synergy
Mirrormade
30%inclusion8 decks27 decks
20%synergy
Static Prison
30%inclusion8 decks27 decks
29%synergy
Chains of Mephistopheles
26%inclusion7 decks27 decks
26%synergy
Seal of Removal
19%inclusion5 decks27 decks
18%synergy
Seal of Cleansing
15%inclusion4 decks27 decks
13%synergy
Trouble in Pairs
15%inclusion4 decks27 decks
9%synergy
Power Artifact
11%inclusion3 decks27 decks
11%synergy
Chthonian Nightmare
11%inclusion3 decks27 decks
10%synergy
Aura of Silence
11%inclusion3 decks27 decks
8%synergy
Grasp of Fate
7.4%inclusion2 decks27 decks
1%synergy
Dance of Many
7.4%inclusion2 decks27 decks
7%synergy
Copy Enchantment
7.4%inclusion2 decks27 decks
3%synergy
Leyline of Anticipation
7.4%inclusion2 decks27 decks
3%synergy
Teval's Judgment
7.1%inclusion1 decks14 decks
6%synergy
Planeswalkers
Teferi, Time Raveler
37%inclusion10 decks27 decks
29%synergy
Tezzeret, Cruel Captain
11%inclusion1 decks9 decks
9%synergy
Ashiok, Dream Render
7.4%inclusion2 decks27 decks
6%synergy
Utility Lands
Otawara, Soaring City
93%inclusion25 decks27 decks
74%synergy
Urza's Saga
44%inclusion12 decks27 decks
32%synergy
Emergence Zone
41%inclusion11 decks27 decks
39%synergy
Minamo, School at Water's Edge
30%inclusion8 decks27 decks
26%synergy
Serra's Sanctum
30%inclusion8 decks27 decks
28%synergy
Cephalid Coliseum
26%inclusion7 decks27 decks
22%synergy
City of Traitors
22%inclusion6 decks27 decks
21%synergy
Urborg, Tomb of Yawgmoth
15%inclusion4 decks27 decks
2%synergy
Hall of Heliod's Generosity
7.4%inclusion2 decks27 decks
-6%synergy
Takenuma, Abandoned Mire
7.4%inclusion2 decks27 decks
1%synergy
Mana Artifacts
Arcane Signet
100%inclusion27 decks27 decks
12%synergy
Sol Ring
100%inclusion27 decks27 decks
10%synergy
Lotus Petal
96%inclusion26 decks27 decks
85%synergy
Mox Opal
93%inclusion25 decks27 decks
84%synergy
Lion's Eye Diamond
89%inclusion24 decks27 decks
87%synergy
Talisman of Dominance
85%inclusion23 decks27 decks
36%synergy
Fellwar Stone
81%inclusion22 decks27 decks
47%synergy
Grim Monolith
63%inclusion17 decks27 decks
59%synergy
Talisman of Progress
44%inclusion12 decks27 decks
2%synergy
Talisman of Hierarchy
41%inclusion11 decks27 decks
-2%synergy
Mox Amber
37%inclusion10 decks27 decks
31%synergy
Basalt Monolith
7.4%inclusion2 decks27 decks
5%synergy
Lands
Tundra
100%inclusion27 decks27 decks
84%synergy
Command Tower
100%inclusion27 decks27 decks
8%synergy
Underground Sea
100%inclusion27 decks27 decks
84%synergy
Godless Shrine
100%inclusion27 decks27 decks
50%synergy
Scrubland
100%inclusion27 decks27 decks
84%synergy
Marsh Flats
100%inclusion27 decks27 decks
64%synergy
Polluted Delta
100%inclusion27 decks27 decks
63%synergy
Hallowed Fountain
100%inclusion27 decks27 decks
51%synergy
City of Brass
100%inclusion27 decks27 decks
85%synergy
Flooded Strand
100%inclusion27 decks27 decks
62%synergy
Watery Grave
100%inclusion27 decks27 decks
51%synergy
Gemstone Caverns
96%inclusion26 decks27 decks
88%synergy
Mana Confluence
96%inclusion26 decks27 decks
82%synergy
Misty Rainforest
89%inclusion24 decks27 decks
78%synergy
Verdant Catacombs
89%inclusion24 decks27 decks
78%synergy
Arid Mesa
85%inclusion23 decks27 decks
75%synergy
Scalding Tarn
85%inclusion23 decks27 decks
74%synergy
Bloodstained Mire
85%inclusion23 decks27 decks
74%synergy
Windswept Heath
74%inclusion20 decks27 decks
64%synergy
Exotic Orchard
70%inclusion19 decks27 decks
12%synergy
Morphic Pool
63%inclusion17 decks27 decks
28%synergy
Undercity Sewers
59%inclusion16 decks27 decks
45%synergy
Island
44%inclusion12 decks27 decks
-48%synergy
Sea of Clouds
41%inclusion11 decks27 decks
5%synergy
Vault of Champions
33%inclusion9 decks27 decks
0%synergy
Cavern of Souls
30%inclusion8 decks27 decks
23%synergy
Swamp
26%inclusion7 decks27 decks
-65%synergy
Meticulous Archive
19%inclusion5 decks27 decks
5%synergy
Starting Town
18%inclusion2 decks11 decks
14%synergy
Plains
15%inclusion4 decks27 decks
-77%synergy
Sink into Stupor
15%inclusion4 decks27 decks
2%synergy
Talon Gates of Madara
11%inclusion3 decks27 decks
10%synergy
Forbidden Orchard
11%inclusion3 decks27 decks
8%synergy
Gemstone Mine
7.4%inclusion2 decks27 decks
7%synergy
Shadowy Backstreet
7.4%inclusion2 decks27 decks
-5%synergy
Spire of Industry
7.4%inclusion2 decks27 decks
-1%synergy
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