The Master of Keys (Commander) - Expensive

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
Mana Artifacts
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Wan Shi Tong, Librarian
53%inclusion35 decks66 decks
48%synergy
Voracious Tome-Skimmer
17%inclusion1 decks6 decks
16%synergy
High Synergy Cards
Necromancy
95%inclusion629 decks659 decks
91%synergy
Abdel Adrian, Gorion's Ward
91%inclusion599 decks659 decks
89%synergy
Intuition
91%inclusion597 decks659 decks
89%synergy
Animate Dead
97%inclusion641 decks659 decks
88%synergy
Entomb
94%inclusion620 decks659 decks
87%synergy
Dance of the Dead
89%inclusion584 decks659 decks
86%synergy
Tainted Pact
93%inclusion614 decks659 decks
86%synergy
Dress Down
88%inclusion577 decks659 decks
85%synergy
Orcish Bowmasters
94%inclusion618 decks659 decks
83%synergy
Silence
93%inclusion612 decks659 decks
82%synergy
Top Cards
Mystic Remora
99%inclusion655 decks659 decks
78%synergy
Esper Sentinel
98%inclusion647 decks659 decks
70%synergy
Dark Ritual
95%inclusion625 decks659 decks
75%synergy
Smothering Tithe
94%inclusion619 decks659 decks
62%synergy
Force of Negation
91%inclusion602 decks659 decks
79%synergy
Swan Song
91%inclusion601 decks659 decks
72%synergy
Flusterstorm
89%inclusion589 decks659 decks
81%synergy
Mindbreak Trap
88%inclusion578 decks659 decks
81%synergy
Demonic Consultation
87%inclusion571 decks659 decks
78%synergy
Imperial Seal
86%inclusion568 decks659 decks
79%synergy
Game Changers
Rhystic Study
99%inclusion655 decks659 decks
67%synergy
Demonic Tutor
99%inclusion651 decks659 decks
77%synergy
Vampiric Tutor
99%inclusion650 decks659 decks
81%synergy
Mana Vault
98%inclusion649 decks659 decks
89%synergy
Force of Will
98%inclusion648 decks659 decks
85%synergy
Mox Diamond
98%inclusion644 decks659 decks
90%synergy
Chrome Mox
97%inclusion642 decks659 decks
88%synergy
Ancient Tomb
97%inclusion641 decks659 decks
84%synergy
Enlightened Tutor
97%inclusion639 decks659 decks
77%synergy
Thassa's Oracle
97%inclusion636 decks659 decks
87%synergy
Creatures
Grand Abolisher
85%inclusion558 decks659 decks
70%synergy
Ranger-Captain of Eos
85%inclusion557 decks659 decks
78%synergy
Lotho, Corrupt Shirriff
80%inclusion526 decks659 decks
63%synergy
Valley Floodcaller
74%inclusion485 decks659 decks
69%synergy
Opposition Agent
58%inclusion381 decks659 decks
49%synergy
Voice of Victory
56%inclusion157 decks282 decks
47%synergy
Displacer Kitten
53%inclusion350 decks659 decks
46%synergy
Hullbreaker Horror
50%inclusion331 decks659 decks
44%synergy
Auriok Salvagers
46%inclusion301 decks659 decks
45%synergy
Mockingbird
44%inclusion293 decks659 decks
40%synergy
Drannith Magistrate
44%inclusion291 decks659 decks
36%synergy
Archivist of Oghma
41%inclusion268 decks659 decks
34%synergy
Lurrus of the Dream-Den
35%inclusion231 decks659 decks
33%synergy
Ledger Shredder
31%inclusion205 decks659 decks
22%synergy
Talion, the Kindly Lord
30%inclusion195 decks659 decks
21%synergy
Phyrexian Metamorph
27%inclusion177 decks659 decks
18%synergy
Tataru Taru
24%inclusion50 decks208 decks
16%synergy
Pollywog Prodigy
23%inclusion149 decks659 decks
18%synergy
Psychic Frog
21%inclusion140 decks659 decks
14%synergy
Hedron Crab
20%inclusion135 decks659 decks
20%synergy
Faerie Mastermind
18%inclusion121 decks659 decks
9%synergy
Dauthi Voidwalker
14%inclusion91 decks659 decks
8%synergy
Ghostly Pilferer
12%inclusion81 decks659 decks
5%synergy
Hoarding Broodlord
10%inclusion66 decks659 decks
8%synergy
High Fae Trickster
10%inclusion47 decks484 decks
5%synergy
Snapcaster Mage
9.4%inclusion62 decks659 decks
7%synergy
Gilded Drake
9.3%inclusion61 decks659 decks
7%synergy
Leonin Relic-Warder
8.6%inclusion57 decks659 decks
8%synergy
Emet-Selch of the Third Seat
8.1%inclusion17 decks209 decks
-2%synergy
Volatile Stormdrake
8.0%inclusion53 decks659 decks
7%synergy
Overlord of the Balemurk
5.6%inclusion37 decks659 decks
4%synergy
Instants
Mental Misstep
85%inclusion557 decks659 decks
77%synergy
Pact of Negation
84%inclusion551 decks659 decks
76%synergy
Swords to Plowshares
75%inclusion495 decks659 decks
7%synergy
Fierce Guardianship
75%inclusion495 decks659 decks
54%synergy
Borne Upon a Wind
75%inclusion493 decks659 decks
70%synergy
Mystical Tutor
70%inclusion460 decks659 decks
58%synergy
Cabal Ritual
63%inclusion415 decks659 decks
59%synergy
Cyclonic Rift
59%inclusion386 decks659 decks
34%synergy
An Offer You Can't Refuse
57%inclusion373 decks659 decks
30%synergy
Chain of Vapor
46%inclusion305 decks659 decks
43%synergy
Mana Drain
38%inclusion253 decks659 decks
21%synergy
Into the Flood Maw
34%inclusion224 decks659 decks
30%synergy
Gifts Ungiven
27%inclusion176 decks659 decks
24%synergy
Sink into Stupor
25%inclusion165 decks659 decks
12%synergy
Ad Nauseam
25%inclusion162 decks659 decks
22%synergy
Culling the Weak
19%inclusion126 decks659 decks
17%synergy
Retraction Helix
19%inclusion125 decks659 decks
18%synergy
Brain Freeze
17%inclusion111 decks659 decks
16%synergy
Path to Exile
16%inclusion106 decks659 decks
-26%synergy
Darkblast
15%inclusion100 decks659 decks
15%synergy
Banishing Knack
12%inclusion76 decks659 decks
11%synergy
Dispel
9.1%inclusion60 decks659 decks
5%synergy
Saw in Half
8.3%inclusion55 decks659 decks
6%synergy
Deadly Rollick
7.9%inclusion52 decks659 decks
-6%synergy
Strix Serenade
7.7%inclusion51 decks659 decks
4%synergy
Sacrifice
6.5%inclusion43 decks659 decks
6%synergy
Dramatic Reversal
6.2%inclusion41 decks659 decks
4%synergy
Lim-Dûl's Vault
5.5%inclusion36 decks659 decks
2%synergy
Muddle the Mixture
5.2%inclusion34 decks659 decks
1%synergy
Angel's Grace
5.0%inclusion33 decks659 decks
2%synergy
Sorceries
Sevinne's Reclamation
71%inclusion466 decks659 decks
62%synergy
Reanimate
36%inclusion239 decks659 decks
20%synergy
Toxic Deluge
35%inclusion231 decks659 decks
15%synergy
Windfall
30%inclusion199 decks659 decks
16%synergy
Beseech the Mirror
26%inclusion169 decks659 decks
22%synergy
Mnemonic Betrayal
24%inclusion158 decks659 decks
21%synergy
Lively Dirge
22%inclusion147 decks659 decks
21%synergy
Demonic Counsel
16%inclusion106 decks659 decks
15%synergy
Yawgmoth's Will
15%inclusion100 decks659 decks
14%synergy
Praetor's Grasp
11%inclusion70 decks659 decks
8%synergy
Diabolic Intent
10%inclusion69 decks659 decks
5%synergy
Cabal Therapy
10%inclusion67 decks659 decks
10%synergy
Unmarked Grave
10%inclusion66 decks659 decks
9%synergy
Utility Artifacts
The One Ring
85%inclusion559 decks659 decks
71%synergy
Wishclaw Talisman
69%inclusion458 decks659 decks
61%synergy
Cursed Totem
10%inclusion67 decks659 decks
8%synergy
Vexing Bauble
8.5%inclusion56 decks659 decks
7%synergy
Mesmeric Orb
7.6%inclusion50 decks659 decks
6%synergy
Sensei's Divining Top
6.2%inclusion41 decks659 decks
-4%synergy
Isochron Scepter
5.9%inclusion39 decks659 decks
4%synergy
Enchantments
Necropotence
70%inclusion463 decks659 decks
63%synergy
Tinybones Joins Up
63%inclusion415 decks659 decks
62%synergy
Blind Obedience
60%inclusion393 decks659 decks
47%synergy
Copy Artifact
53%inclusion346 decks659 decks
51%synergy
Amphibian Downpour
49%inclusion321 decks659 decks
44%synergy
Ripples of Undeath
47%inclusion312 decks659 decks
45%synergy
Touch the Spirit Realm
44%inclusion289 decks659 decks
41%synergy
Static Prison
37%inclusion246 decks659 decks
37%synergy
The Meathook Massacre
36%inclusion238 decks659 decks
33%synergy
Mirrormade
32%inclusion212 decks659 decks
22%synergy
Steal Enchantment
31%inclusion206 decks659 decks
30%synergy
Chains of Mephistopheles
22%inclusion148 decks659 decks
22%synergy
Trouble in Pairs
21%inclusion141 decks659 decks
16%synergy
Counterbalance
20%inclusion134 decks659 decks
19%synergy
Founding the Third Path
16%inclusion106 decks659 decks
16%synergy
Chthonian Nightmare
14%inclusion89 decks659 decks
13%synergy
Copy Enchantment
12%inclusion79 decks659 decks
7%synergy
Seal of Removal
9.4%inclusion62 decks659 decks
9%synergy
Seal of Cleansing
7.4%inclusion49 decks659 decks
6%synergy
Power Artifact
7.3%inclusion48 decks659 decks
7%synergy
Aura of Silence
7.1%inclusion47 decks659 decks
4%synergy
Dance of Many
6.7%inclusion44 decks659 decks
7%synergy
Monologue Tax
6.7%inclusion44 decks659 decks
0%synergy
Charitable Levy
5.8%inclusion38 decks659 decks
5%synergy
Leyline of Anticipation
5.8%inclusion38 decks659 decks
1%synergy
Second Chance
5.0%inclusion33 decks659 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
53%inclusion352 decks659 decks
45%synergy
Utility Lands
Otawara, Soaring City
93%inclusion610 decks659 decks
73%synergy
Urza's Saga
45%inclusion295 decks659 decks
33%synergy
Minamo, School at Water's Edge
35%inclusion232 decks659 decks
31%synergy
Emergence Zone
29%inclusion194 decks659 decks
27%synergy
City of Traitors
28%inclusion186 decks659 decks
27%synergy
Serra's Sanctum
25%inclusion164 decks659 decks
23%synergy
Cephalid Coliseum
22%inclusion142 decks659 decks
18%synergy
Takenuma, Abandoned Mire
10%inclusion66 decks659 decks
4%synergy
Urborg, Tomb of Yawgmoth
8.0%inclusion53 decks659 decks
-5%synergy
Hall of Heliod's Generosity
5.9%inclusion39 decks659 decks
-7%synergy
Mana Artifacts
Sol Ring
100%inclusion657 decks659 decks
10%synergy
Arcane Signet
97%inclusion641 decks659 decks
9%synergy
Lotus Petal
96%inclusion633 decks659 decks
85%synergy
Mox Opal
87%inclusion574 decks659 decks
78%synergy
Talisman of Dominance
84%inclusion556 decks659 decks
35%synergy
Lion's Eye Diamond
83%inclusion549 decks659 decks
81%synergy
Fellwar Stone
79%inclusion522 decks659 decks
45%synergy
Grim Monolith
62%inclusion411 decks659 decks
59%synergy
Talisman of Progress
51%inclusion335 decks659 decks
8%synergy
Mox Amber
40%inclusion264 decks659 decks
34%synergy
Talisman of Hierarchy
31%inclusion204 decks659 decks
-12%synergy
Basalt Monolith
7.7%inclusion51 decks659 decks
5%synergy
Lands
Underground Sea
100%inclusion657 decks659 decks
84%synergy
Tundra
100%inclusion657 decks659 decks
84%synergy
Scrubland
100%inclusion657 decks659 decks
84%synergy
Watery Grave
99%inclusion654 decks659 decks
49%synergy
Polluted Delta
99%inclusion653 decks659 decks
62%synergy
Flooded Strand
98%inclusion649 decks659 decks
60%synergy
Hallowed Fountain
98%inclusion648 decks659 decks
49%synergy
Command Tower
98%inclusion647 decks659 decks
6%synergy
Marsh Flats
98%inclusion643 decks659 decks
61%synergy
Godless Shrine
94%inclusion622 decks659 decks
44%synergy
Mana Confluence
94%inclusion618 decks659 decks
80%synergy
Gemstone Caverns
93%inclusion612 decks659 decks
85%synergy
City of Brass
92%inclusion607 decks659 decks
77%synergy
Misty Rainforest
89%inclusion585 decks659 decks
77%synergy
Bloodstained Mire
86%inclusion565 decks659 decks
75%synergy
Verdant Catacombs
85%inclusion562 decks659 decks
75%synergy
Scalding Tarn
84%inclusion554 decks659 decks
73%synergy
Windswept Heath
74%inclusion485 decks659 decks
64%synergy
Arid Mesa
69%inclusion452 decks659 decks
59%synergy
Exotic Orchard
68%inclusion451 decks659 decks
10%synergy
Morphic Pool
63%inclusion418 decks659 decks
29%synergy
Undercity Sewers
57%inclusion376 decks659 decks
43%synergy
Sea of Clouds
50%inclusion330 decks659 decks
14%synergy
Vault of Champions
39%inclusion258 decks659 decks
6%synergy
Island
37%inclusion242 decks659 decks
-56%synergy
Starting Town
29%inclusion60 decks209 decks
25%synergy
Swamp
28%inclusion183 decks659 decks
-63%synergy
Sink into Stupor
25%inclusion165 decks659 decks
12%synergy
Meticulous Archive
24%inclusion156 decks659 decks
10%synergy
Forbidden Orchard
19%inclusion127 decks659 decks
17%synergy
Plains
19%inclusion122 decks659 decks
-73%synergy
Cavern of Souls
18%inclusion119 decks659 decks
11%synergy
Spire of Industry
18%inclusion116 decks659 decks
9%synergy
Shadowy Backstreet
15%inclusion102 decks659 decks
3%synergy
Talon Gates of Madara
14%inclusion89 decks659 decks
12%synergy
Underground River
8.3%inclusion55 decks659 decks
-25%synergy
Raffine's Tower
5.6%inclusion37 decks659 decks
-35%synergy
Gloomlake Verge
5.5%inclusion36 decks659 decks
-6%synergy
Silent Clearing
5.2%inclusion34 decks659 decks
3%synergy
Tarnished Citadel
5.0%inclusion33 decks659 decks
4%synergy
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