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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Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Does Machines
17%inclusion1 decks6 decks
17%synergy
High Synergy Cards
Necromancy
100%inclusion31 decks31 decks
95%synergy
Wan Shi Tong, Librarian
100%inclusion7 decks7 decks
95%synergy
Intuition
94%inclusion29 decks31 decks
92%synergy
Silence
100%inclusion31 decks31 decks
90%synergy
Dance of the Dead
90%inclusion28 decks31 decks
88%synergy
Entomb
94%inclusion29 decks31 decks
87%synergy
Tainted Pact
94%inclusion29 decks31 decks
87%synergy
Pact of Negation
94%inclusion29 decks31 decks
86%synergy
Abdel Adrian, Gorion's Ward
87%inclusion27 decks31 decks
85%synergy
Dress Down
87%inclusion27 decks31 decks
85%synergy
Top Cards
Dark Ritual
100%inclusion31 decks31 decks
80%synergy
Esper Sentinel
100%inclusion31 decks31 decks
73%synergy
Mystic Remora
100%inclusion31 decks31 decks
79%synergy
Sevinne's Reclamation
94%inclusion29 decks31 decks
85%synergy
Animate Dead
94%inclusion29 decks31 decks
84%synergy
Orcish Bowmasters
94%inclusion29 decks31 decks
83%synergy
Smothering Tithe
90%inclusion28 decks31 decks
59%synergy
Flusterstorm
90%inclusion28 decks31 decks
82%synergy
Force of Negation
90%inclusion28 decks31 decks
79%synergy
Grand Abolisher
90%inclusion28 decks31 decks
76%synergy
Game Changers
Ancient Tomb
100%inclusion31 decks31 decks
87%synergy
Demonic Tutor
100%inclusion31 decks31 decks
79%synergy
Force of Will
100%inclusion31 decks31 decks
88%synergy
Enlightened Tutor
100%inclusion31 decks31 decks
81%synergy
Vampiric Tutor
100%inclusion31 decks31 decks
83%synergy
Mox Diamond
100%inclusion31 decks31 decks
93%synergy
Rhystic Study
97%inclusion30 decks31 decks
66%synergy
Mana Vault
97%inclusion30 decks31 decks
88%synergy
Chrome Mox
97%inclusion30 decks31 decks
88%synergy
Thassa's Oracle
94%inclusion29 decks31 decks
84%synergy
Creatures
Ranger-Captain of Eos
87%inclusion27 decks31 decks
81%synergy
Lotho, Corrupt Shirriff
81%inclusion25 decks31 decks
64%synergy
Valley Floodcaller
65%inclusion20 decks31 decks
61%synergy
Opposition Agent
52%inclusion16 decks31 decks
43%synergy
Mockingbird
52%inclusion16 decks31 decks
47%synergy
Drannith Magistrate
48%inclusion15 decks31 decks
41%synergy
Auriok Salvagers
48%inclusion15 decks31 decks
48%synergy
Displacer Kitten
45%inclusion14 decks31 decks
38%synergy
Hullbreaker Horror
42%inclusion13 decks31 decks
36%synergy
Voice of Victory
41%inclusion7 decks17 decks
33%synergy
Tataru Taru
36%inclusion5 decks14 decks
27%synergy
Lurrus of the Dream-Den
35%inclusion11 decks31 decks
34%synergy
Archivist of Oghma
32%inclusion10 decks31 decks
26%synergy
Hedron Crab
32%inclusion10 decks31 decks
32%synergy
Ledger Shredder
26%inclusion8 decks31 decks
17%synergy
Phyrexian Metamorph
23%inclusion7 decks31 decks
14%synergy
Psychic Frog
23%inclusion7 decks31 decks
16%synergy
Ghostly Pilferer
23%inclusion7 decks31 decks
15%synergy
Snapcaster Mage
19%inclusion6 decks31 decks
17%synergy
Talion, the Kindly Lord
19%inclusion6 decks31 decks
12%synergy
Faerie Mastermind
19%inclusion6 decks31 decks
10%synergy
Leonin Relic-Warder
16%inclusion5 decks31 decks
16%synergy
High Fae Trickster
16%inclusion4 decks25 decks
11%synergy
Voracious Tome-Skimmer
14%inclusion1 decks7 decks
14%synergy
Pollywog Prodigy
10%inclusion3 decks31 decks
6%synergy
Dauthi Voidwalker
10%inclusion3 decks31 decks
4%synergy
Emet-Selch of the Third Seat
7.1%inclusion1 decks14 decks
-2%synergy
Volatile Stormdrake
6.5%inclusion2 decks31 decks
5%synergy
Hoarding Broodlord
6.5%inclusion2 decks31 decks
5%synergy
Consecrated Sphinx
6.5%inclusion2 decks31 decks
0%synergy
Cephalid Illusionist
6.5%inclusion2 decks31 decks
6%synergy
Walking Ballista
6.5%inclusion2 decks31 decks
4%synergy
Heliod, Sun-Crowned
6.5%inclusion2 decks31 decks
3%synergy
Gilded Drake
6.5%inclusion2 decks31 decks
5%synergy
Laboratory Maniac
6.5%inclusion2 decks31 decks
3%synergy
Nomads en-Kor
6.5%inclusion2 decks31 decks
6%synergy
Nezahal, Primal Tide
6.5%inclusion2 decks31 decks
3%synergy
Academy Rector
6.5%inclusion2 decks31 decks
6%synergy
Instants
Mindbreak Trap
87%inclusion27 decks31 decks
80%synergy
Demonic Consultation
87%inclusion27 decks31 decks
79%synergy
Mental Misstep
84%inclusion26 decks31 decks
77%synergy
Swan Song
84%inclusion26 decks31 decks
64%synergy
Borne Upon a Wind
81%inclusion25 decks31 decks
76%synergy
Mystical Tutor
77%inclusion24 decks31 decks
67%synergy
Swords to Plowshares
74%inclusion23 decks31 decks
6%synergy
Cabal Ritual
71%inclusion22 decks31 decks
68%synergy
Fierce Guardianship
71%inclusion22 decks31 decks
51%synergy
Cyclonic Rift
52%inclusion16 decks31 decks
28%synergy
An Offer You Can't Refuse
48%inclusion15 decks31 decks
21%synergy
Chain of Vapor
42%inclusion13 decks31 decks
39%synergy
Gifts Ungiven
39%inclusion12 decks31 decks
36%synergy
Mana Drain
35%inclusion11 decks31 decks
18%synergy
Brain Freeze
29%inclusion9 decks31 decks
28%synergy
Into the Flood Maw
29%inclusion9 decks31 decks
25%synergy
Retraction Helix
23%inclusion7 decks31 decks
22%synergy
Sink into Stupor
23%inclusion7 decks31 decks
10%synergy
Darkblast
19%inclusion6 decks31 decks
19%synergy
Culling the Weak
16%inclusion5 decks31 decks
15%synergy
Ad Nauseam
16%inclusion5 decks31 decks
14%synergy
Path to Exile
16%inclusion5 decks31 decks
-26%synergy
Orim's Chant
13%inclusion4 decks31 decks
11%synergy
Banishing Knack
13%inclusion4 decks31 decks
13%synergy
Deadly Rollick
10%inclusion3 decks31 decks
-5%synergy
Lim-Dûl's Vault
10%inclusion3 decks31 decks
6%synergy
Strix Serenade
10%inclusion3 decks31 decks
6%synergy
Sacrifice
6.5%inclusion2 decks31 decks
6%synergy
Muddle the Mixture
6.5%inclusion2 decks31 decks
3%synergy
Commandeer
6.5%inclusion2 decks31 decks
5%synergy
Dramatic Reversal
6.5%inclusion2 decks31 decks
4%synergy
Saw in Half
6.5%inclusion2 decks31 decks
4%synergy
Sorceries
Imperial Seal
87%inclusion27 decks31 decks
80%synergy
Reanimate
48%inclusion15 decks31 decks
32%synergy
Flash Photography
29%inclusion2 decks7 decks
28%synergy
Mnemonic Betrayal
26%inclusion8 decks31 decks
23%synergy
Unmarked Grave
23%inclusion7 decks31 decks
21%synergy
Toxic Deluge
23%inclusion7 decks31 decks
3%synergy
Lively Dirge
19%inclusion6 decks31 decks
18%synergy
Demonic Counsel
19%inclusion6 decks31 decks
18%synergy
Beseech the Mirror
19%inclusion6 decks31 decks
15%synergy
Cabal Therapy
16%inclusion5 decks31 decks
16%synergy
Diabolic Intent
16%inclusion5 decks31 decks
11%synergy
Windfall
16%inclusion5 decks31 decks
3%synergy
Yawgmoth's Will
10%inclusion3 decks31 decks
8%synergy
Timetwister
10%inclusion3 decks31 decks
9%synergy
Singularity Rupture
8.3%inclusion1 decks12 decks
6%synergy
Praetor's Grasp
6.5%inclusion2 decks31 decks
4%synergy
Utility Artifacts
The One Ring
71%inclusion22 decks31 decks
58%synergy
Wishclaw Talisman
58%inclusion18 decks31 decks
50%synergy
Vexing Bauble
16%inclusion5 decks31 decks
14%synergy
Mesmeric Orb
10%inclusion3 decks31 decks
9%synergy
Agatha's Soul Cauldron
10%inclusion3 decks31 decks
9%synergy
Cursed Totem
6.5%inclusion2 decks31 decks
4%synergy
Altar of the Brood
6.5%inclusion2 decks31 decks
5%synergy
Isochron Scepter
6.5%inclusion2 decks31 decks
4%synergy
Enchantments
Necropotence
71%inclusion22 decks31 decks
64%synergy
Amphibian Downpour
65%inclusion20 decks31 decks
60%synergy
Blind Obedience
61%inclusion19 decks31 decks
49%synergy
Tinybones Joins Up
58%inclusion18 decks31 decks
57%synergy
The Meathook Massacre
42%inclusion13 decks31 decks
39%synergy
Mirrormade
42%inclusion13 decks31 decks
32%synergy
Static Prison
42%inclusion13 decks31 decks
41%synergy
Ripples of Undeath
39%inclusion12 decks31 decks
36%synergy
Copy Artifact
39%inclusion12 decks31 decks
38%synergy
Counterbalance
35%inclusion11 decks31 decks
34%synergy
Founding the Third Path
32%inclusion10 decks31 decks
32%synergy
Steal Enchantment
32%inclusion10 decks31 decks
31%synergy
Touch the Spirit Realm
29%inclusion9 decks31 decks
27%synergy
Chains of Mephistopheles
29%inclusion9 decks31 decks
29%synergy
Copy Enchantment
16%inclusion5 decks31 decks
11%synergy
Mornsong Aria
14%inclusion1 decks7 decks
14%synergy
Power Artifact
13%inclusion4 decks31 decks
13%synergy
Seal of Removal
13%inclusion4 decks31 decks
12%synergy
Trouble in Pairs
13%inclusion4 decks31 decks
8%synergy
Leyline of Anticipation
10%inclusion3 decks31 decks
5%synergy
Seal of Cleansing
10%inclusion3 decks31 decks
8%synergy
Aura of Silence
10%inclusion3 decks31 decks
7%synergy
Grasp of Fate
6.5%inclusion2 decks31 decks
0%synergy
Monologue Tax
6.5%inclusion2 decks31 decks
0%synergy
Chthonian Nightmare
6.5%inclusion2 decks31 decks
6%synergy
Teval's Judgment
5.9%inclusion1 decks17 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
35%inclusion11 decks31 decks
27%synergy
Tezzeret, Cruel Captain
8.3%inclusion1 decks12 decks
6%synergy
Jace, Wielder of Mysteries
6.5%inclusion2 decks31 decks
5%synergy
Ashiok, Dream Render
6.5%inclusion2 decks31 decks
5%synergy
Utility Lands
Otawara, Soaring City
90%inclusion28 decks31 decks
71%synergy
Urza's Saga
45%inclusion14 decks31 decks
33%synergy
Emergence Zone
35%inclusion11 decks31 decks
33%synergy
Cephalid Coliseum
32%inclusion10 decks31 decks
29%synergy
Serra's Sanctum
29%inclusion9 decks31 decks
27%synergy
City of Traitors
29%inclusion9 decks31 decks
28%synergy
Minamo, School at Water's Edge
26%inclusion8 decks31 decks
22%synergy
Urborg, Tomb of Yawgmoth
16%inclusion5 decks31 decks
3%synergy
Hall of Heliod's Generosity
6.5%inclusion2 decks31 decks
-7%synergy
Takenuma, Abandoned Mire
6.5%inclusion2 decks31 decks
0%synergy
Strip Mine
6.5%inclusion2 decks31 decks
5%synergy
Mistrise Village
5.9%inclusion1 decks17 decks
2%synergy
Mana Artifacts
Arcane Signet
100%inclusion31 decks31 decks
12%synergy
Sol Ring
100%inclusion31 decks31 decks
10%synergy
Lotus Petal
97%inclusion30 decks31 decks
86%synergy
Lion's Eye Diamond
90%inclusion28 decks31 decks
88%synergy
Mox Opal
87%inclusion27 decks31 decks
79%synergy
Fellwar Stone
81%inclusion25 decks31 decks
47%synergy
Talisman of Dominance
77%inclusion24 decks31 decks
28%synergy
Grim Monolith
61%inclusion19 decks31 decks
58%synergy
Mox Amber
39%inclusion12 decks31 decks
33%synergy
Talisman of Hierarchy
39%inclusion12 decks31 decks
-5%synergy
Talisman of Progress
35%inclusion11 decks31 decks
-8%synergy
Basalt Monolith
10%inclusion3 decks31 decks
7%synergy
Lands
Tundra
100%inclusion31 decks31 decks
84%synergy
Command Tower
100%inclusion31 decks31 decks
7%synergy
Underground Sea
100%inclusion31 decks31 decks
84%synergy
Godless Shrine
100%inclusion31 decks31 decks
49%synergy
Scrubland
100%inclusion31 decks31 decks
84%synergy
Marsh Flats
100%inclusion31 decks31 decks
64%synergy
Polluted Delta
100%inclusion31 decks31 decks
62%synergy
Flooded Strand
100%inclusion31 decks31 decks
62%synergy
Watery Grave
100%inclusion31 decks31 decks
49%synergy
Gemstone Caverns
97%inclusion30 decks31 decks
89%synergy
Mana Confluence
97%inclusion30 decks31 decks
83%synergy
Hallowed Fountain
97%inclusion30 decks31 decks
46%synergy
City of Brass
97%inclusion30 decks31 decks
82%synergy
Misty Rainforest
90%inclusion28 decks31 decks
80%synergy
Verdant Catacombs
87%inclusion27 decks31 decks
77%synergy
Scalding Tarn
84%inclusion26 decks31 decks
73%synergy
Bloodstained Mire
84%inclusion26 decks31 decks
73%synergy
Arid Mesa
81%inclusion25 decks31 decks
71%synergy
Windswept Heath
74%inclusion23 decks31 decks
65%synergy
Exotic Orchard
71%inclusion22 decks31 decks
12%synergy
Morphic Pool
61%inclusion19 decks31 decks
27%synergy
Undercity Sewers
55%inclusion17 decks31 decks
40%synergy
Starting Town
43%inclusion6 decks14 decks
39%synergy
Sea of Clouds
39%inclusion12 decks31 decks
4%synergy
Island
39%inclusion12 decks31 decks
-54%synergy
Cavern of Souls
32%inclusion10 decks31 decks
26%synergy
Vault of Champions
29%inclusion9 decks31 decks
-3%synergy
Swamp
23%inclusion7 decks31 decks
-69%synergy
Sink into Stupor
23%inclusion7 decks31 decks
10%synergy
Meticulous Archive
19%inclusion6 decks31 decks
5%synergy
Plains
13%inclusion4 decks31 decks
-79%synergy
Forbidden Orchard
10%inclusion3 decks31 decks
7%synergy
Prismatic Vista
6.5%inclusion2 decks31 decks
3%synergy
Gemstone Mine
6.5%inclusion2 decks31 decks
6%synergy
Shadowy Backstreet
6.5%inclusion2 decks31 decks
-6%synergy
Spire of Industry
6.5%inclusion2 decks31 decks
-2%synergy
Talon Gates of Madara
6.5%inclusion2 decks31 decks
5%synergy
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