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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Mornsong Aria
8.0%inclusion6 decks75 decks
7%synergy
Does Machines
1.5%inclusion1 decks67 decks
1%synergy
Voracious Tome-Skimmer
1.3%inclusion1 decks75 decks
1%synergy
High Synergy Cards
Necromancy
96%inclusion697 decks728 decks
91%synergy
Intuition
91%inclusion666 decks728 decks
90%synergy
Abdel Adrian, Gorion's Ward
90%inclusion655 decks728 decks
88%synergy
Animate Dead
97%inclusion705 decks728 decks
87%synergy
Entomb
94%inclusion682 decks728 decks
87%synergy
Dance of the Dead
89%inclusion645 decks728 decks
86%synergy
Tainted Pact
93%inclusion678 decks728 decks
86%synergy
Dress Down
87%inclusion635 decks728 decks
85%synergy
Silence
93%inclusion677 decks728 decks
83%synergy
Orcish Bowmasters
93%inclusion679 decks728 decks
83%synergy
Top Cards
Mystic Remora
99%inclusion723 decks728 decks
78%synergy
Esper Sentinel
99%inclusion718 decks728 decks
71%synergy
Dark Ritual
95%inclusion692 decks728 decks
75%synergy
Smothering Tithe
94%inclusion687 decks728 decks
63%synergy
Swan Song
91%inclusion664 decks728 decks
71%synergy
Force of Negation
91%inclusion661 decks728 decks
79%synergy
Flusterstorm
90%inclusion653 decks728 decks
82%synergy
Mindbreak Trap
88%inclusion644 decks728 decks
82%synergy
Demonic Consultation
87%inclusion634 decks728 decks
79%synergy
Imperial Seal
86%inclusion625 decks728 decks
79%synergy
Game Changers
Rhystic Study
100%inclusion725 decks728 decks
68%synergy
Vampiric Tutor
99%inclusion721 decks728 decks
82%synergy
Demonic Tutor
99%inclusion720 decks728 decks
78%synergy
Mana Vault
98%inclusion716 decks728 decks
89%synergy
Mox Diamond
98%inclusion715 decks728 decks
91%synergy
Force of Will
98%inclusion714 decks728 decks
86%synergy
Chrome Mox
97%inclusion708 decks728 decks
88%synergy
Enlightened Tutor
97%inclusion708 decks728 decks
78%synergy
Ancient Tomb
97%inclusion707 decks728 decks
84%synergy
Thassa's Oracle
96%inclusion701 decks728 decks
87%synergy
Creatures
Grand Abolisher
85%inclusion621 decks728 decks
71%synergy
Ranger-Captain of Eos
84%inclusion613 decks728 decks
78%synergy
Lotho, Corrupt Shirriff
80%inclusion583 decks728 decks
63%synergy
Valley Floodcaller
74%inclusion541 decks728 decks
70%synergy
Wan Shi Tong, Librarian
59%inclusion73 decks124 decks
54%synergy
Voice of Victory
58%inclusion196 decks340 decks
49%synergy
Opposition Agent
57%inclusion418 decks728 decks
49%synergy
Displacer Kitten
52%inclusion375 decks728 decks
45%synergy
Hullbreaker Horror
49%inclusion357 decks728 decks
43%synergy
Auriok Salvagers
46%inclusion334 decks728 decks
46%synergy
Mockingbird
45%inclusion326 decks728 decks
40%synergy
Drannith Magistrate
44%inclusion321 decks728 decks
36%synergy
Archivist of Oghma
40%inclusion293 decks728 decks
34%synergy
Lurrus of the Dream-Den
35%inclusion252 decks728 decks
33%synergy
Tataru Taru
31%inclusion80 decks262 decks
22%synergy
Ledger Shredder
30%inclusion218 decks728 decks
21%synergy
Talion, the Kindly Lord
28%inclusion202 decks728 decks
20%synergy
Phyrexian Metamorph
25%inclusion183 decks728 decks
17%synergy
Faerie Mastermind
22%inclusion159 decks728 decks
12%synergy
Pollywog Prodigy
22%inclusion157 decks728 decks
18%synergy
Hedron Crab
21%inclusion150 decks728 decks
20%synergy
Psychic Frog
20%inclusion144 decks728 decks
13%synergy
Ghostly Pilferer
13%inclusion96 decks728 decks
6%synergy
Dauthi Voidwalker
13%inclusion94 decks728 decks
7%synergy
Hoarding Broodlord
9.2%inclusion67 decks728 decks
7%synergy
Gilded Drake
9.2%inclusion67 decks728 decks
8%synergy
High Fae Trickster
8.7%inclusion47 decks540 decks
4%synergy
Snapcaster Mage
8.5%inclusion62 decks728 decks
7%synergy
Leonin Relic-Warder
8.4%inclusion61 decks728 decks
8%synergy
Volatile Stormdrake
7.4%inclusion54 decks728 decks
6%synergy
Emet-Selch of the Third Seat
6.5%inclusion17 decks263 decks
-3%synergy
Overlord of the Balemurk
5.1%inclusion37 decks728 decks
3%synergy
Instants
Mental Misstep
85%inclusion622 decks728 decks
79%synergy
Pact of Negation
84%inclusion615 decks728 decks
77%synergy
Swords to Plowshares
76%inclusion550 decks728 decks
7%synergy
Borne Upon a Wind
75%inclusion549 decks728 decks
71%synergy
Fierce Guardianship
74%inclusion539 decks728 decks
54%synergy
Mystical Tutor
69%inclusion504 decks728 decks
58%synergy
Cabal Ritual
64%inclusion467 decks728 decks
61%synergy
Cyclonic Rift
58%inclusion422 decks728 decks
34%synergy
An Offer You Can't Refuse
57%inclusion417 decks728 decks
30%synergy
Chain of Vapor
46%inclusion334 decks728 decks
43%synergy
Mana Drain
37%inclusion268 decks728 decks
19%synergy
Into the Flood Maw
35%inclusion255 decks728 decks
31%synergy
Gifts Ungiven
30%inclusion215 decks728 decks
27%synergy
Ad Nauseam
26%inclusion187 decks728 decks
23%synergy
Sink into Stupor
24%inclusion177 decks728 decks
12%synergy
Culling the Weak
20%inclusion147 decks728 decks
19%synergy
Retraction Helix
18%inclusion130 decks728 decks
17%synergy
Brain Freeze
17%inclusion127 decks728 decks
17%synergy
Path to Exile
16%inclusion115 decks728 decks
-26%synergy
Darkblast
15%inclusion106 decks728 decks
14%synergy
Banishing Knack
11%inclusion81 decks728 decks
11%synergy
Dispel
8.9%inclusion65 decks728 decks
6%synergy
Deadly Rollick
8.4%inclusion61 decks728 decks
-6%synergy
Saw in Half
8.0%inclusion58 decks728 decks
6%synergy
Strix Serenade
6.9%inclusion50 decks728 decks
3%synergy
Orim's Chant
6.7%inclusion49 decks728 decks
5%synergy
Dramatic Reversal
6.6%inclusion48 decks728 decks
5%synergy
Lim-Dûl's Vault
5.8%inclusion42 decks728 decks
3%synergy
Sacrifice
5.6%inclusion41 decks728 decks
5%synergy
Rain of Filth
5.2%inclusion38 decks728 decks
5%synergy
Sorceries
Sevinne's Reclamation
72%inclusion521 decks728 decks
63%synergy
Reanimate
36%inclusion260 decks728 decks
20%synergy
Toxic Deluge
34%inclusion247 decks728 decks
14%synergy
Windfall
31%inclusion223 decks728 decks
17%synergy
Beseech the Mirror
27%inclusion194 decks728 decks
23%synergy
Mnemonic Betrayal
25%inclusion183 decks728 decks
22%synergy
Lively Dirge
22%inclusion157 decks728 decks
20%synergy
Demonic Counsel
16%inclusion114 decks728 decks
15%synergy
Yawgmoth's Will
15%inclusion106 decks728 decks
13%synergy
Praetor's Grasp
11%inclusion81 decks728 decks
8%synergy
Cabal Therapy
10%inclusion74 decks728 decks
10%synergy
Unmarked Grave
10%inclusion73 decks728 decks
9%synergy
Diabolic Intent
10%inclusion70 decks728 decks
5%synergy
Utility Artifacts
The One Ring
83%inclusion605 decks728 decks
70%synergy
Wishclaw Talisman
69%inclusion505 decks728 decks
61%synergy
Cursed Totem
10%inclusion74 decks728 decks
8%synergy
Vexing Bauble
8.0%inclusion58 decks728 decks
6%synergy
Mesmeric Orb
7.7%inclusion56 decks728 decks
7%synergy
Isochron Scepter
6.2%inclusion45 decks728 decks
4%synergy
Sensei's Divining Top
5.8%inclusion42 decks728 decks
-4%synergy
Enchantments
Necropotence
72%inclusion524 decks728 decks
65%synergy
Tinybones Joins Up
62%inclusion454 decks728 decks
61%synergy
Blind Obedience
59%inclusion429 decks728 decks
47%synergy
Copy Artifact
51%inclusion374 decks728 decks
50%synergy
Amphibian Downpour
50%inclusion366 decks728 decks
46%synergy
Ripples of Undeath
48%inclusion348 decks728 decks
45%synergy
Touch the Spirit Realm
42%inclusion308 decks728 decks
40%synergy
The Meathook Massacre
37%inclusion272 decks728 decks
34%synergy
Static Prison
36%inclusion263 decks728 decks
36%synergy
Mirrormade
34%inclusion247 decks728 decks
24%synergy
Steal Enchantment
30%inclusion217 decks728 decks
29%synergy
Chains of Mephistopheles
21%inclusion155 decks728 decks
21%synergy
Trouble in Pairs
21%inclusion152 decks728 decks
16%synergy
Counterbalance
20%inclusion148 decks728 decks
19%synergy
Founding the Third Path
18%inclusion128 decks728 decks
17%synergy
Copy Enchantment
13%inclusion98 decks728 decks
9%synergy
Chthonian Nightmare
13%inclusion92 decks728 decks
12%synergy
Seal of Removal
8.5%inclusion62 decks728 decks
8%synergy
Aura of Silence
7.1%inclusion52 decks728 decks
4%synergy
Power Artifact
7.0%inclusion51 decks728 decks
7%synergy
Seal of Cleansing
6.9%inclusion50 decks728 decks
5%synergy
Monologue Tax
6.7%inclusion49 decks728 decks
0%synergy
Leyline of Anticipation
6.5%inclusion47 decks728 decks
2%synergy
Dance of Many
5.9%inclusion43 decks728 decks
6%synergy
Charitable Levy
5.5%inclusion40 decks728 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
52%inclusion380 decks728 decks
44%synergy
Utility Lands
Otawara, Soaring City
92%inclusion673 decks728 decks
73%synergy
Urza's Saga
45%inclusion326 decks728 decks
33%synergy
Minamo, School at Water's Edge
36%inclusion261 decks728 decks
32%synergy
Emergence Zone
30%inclusion215 decks728 decks
27%synergy
City of Traitors
29%inclusion214 decks728 decks
28%synergy
Serra's Sanctum
24%inclusion177 decks728 decks
23%synergy
Cephalid Coliseum
22%inclusion157 decks728 decks
18%synergy
Takenuma, Abandoned Mire
10%inclusion72 decks728 decks
3%synergy
Urborg, Tomb of Yawgmoth
8.1%inclusion59 decks728 decks
-5%synergy
Hall of Heliod's Generosity
5.8%inclusion42 decks728 decks
-7%synergy
Phyrexian Tower
5.1%inclusion37 decks728 decks
1%synergy
Mana Artifacts
Sol Ring
100%inclusion726 decks728 decks
10%synergy
Arcane Signet
97%inclusion709 decks728 decks
10%synergy
Lotus Petal
96%inclusion698 decks728 decks
85%synergy
Mox Opal
86%inclusion625 decks728 decks
77%synergy
Lion's Eye Diamond
85%inclusion619 decks728 decks
83%synergy
Talisman of Dominance
83%inclusion607 decks728 decks
34%synergy
Fellwar Stone
79%inclusion575 decks728 decks
46%synergy
Grim Monolith
59%inclusion432 decks728 decks
56%synergy
Talisman of Progress
50%inclusion363 decks728 decks
6%synergy
Mox Amber
40%inclusion288 decks728 decks
33%synergy
Talisman of Hierarchy
31%inclusion227 decks728 decks
-13%synergy
Basalt Monolith
7.6%inclusion55 decks728 decks
5%synergy
Lands
Scrubland
100%inclusion727 decks728 decks
84%synergy
Tundra
100%inclusion726 decks728 decks
84%synergy
Underground Sea
100%inclusion726 decks728 decks
84%synergy
Watery Grave
99%inclusion722 decks728 decks
49%synergy
Polluted Delta
99%inclusion721 decks728 decks
61%synergy
Flooded Strand
98%inclusion716 decks728 decks
60%synergy
Hallowed Fountain
98%inclusion714 decks728 decks
48%synergy
Command Tower
98%inclusion713 decks728 decks
5%synergy
Marsh Flats
98%inclusion711 decks728 decks
62%synergy
Godless Shrine
95%inclusion689 decks728 decks
44%synergy
Mana Confluence
94%inclusion684 decks728 decks
80%synergy
Gemstone Caverns
93%inclusion678 decks728 decks
86%synergy
City of Brass
92%inclusion672 decks728 decks
77%synergy
Misty Rainforest
88%inclusion642 decks728 decks
77%synergy
Bloodstained Mire
85%inclusion622 decks728 decks
75%synergy
Verdant Catacombs
85%inclusion618 decks728 decks
75%synergy
Scalding Tarn
84%inclusion610 decks728 decks
73%synergy
Windswept Heath
72%inclusion527 decks728 decks
63%synergy
Arid Mesa
68%inclusion498 decks728 decks
59%synergy
Exotic Orchard
67%inclusion487 decks728 decks
8%synergy
Morphic Pool
64%inclusion468 decks728 decks
30%synergy
Undercity Sewers
57%inclusion418 decks728 decks
43%synergy
Sea of Clouds
50%inclusion366 decks728 decks
15%synergy
Vault of Champions
39%inclusion287 decks728 decks
7%synergy
Island
35%inclusion255 decks728 decks
-58%synergy
Starting Town
35%inclusion92 decks263 decks
31%synergy
Swamp
27%inclusion195 decks728 decks
-65%synergy
Sink into Stupor
24%inclusion177 decks728 decks
12%synergy
Meticulous Archive
24%inclusion172 decks728 decks
10%synergy
Forbidden Orchard
19%inclusion141 decks728 decks
17%synergy
Plains
19%inclusion135 decks728 decks
-73%synergy
Cavern of Souls
18%inclusion130 decks728 decks
11%synergy
Spire of Industry
17%inclusion126 decks728 decks
9%synergy
Shadowy Backstreet
16%inclusion119 decks728 decks
4%synergy
Talon Gates of Madara
13%inclusion92 decks728 decks
11%synergy
Underground River
7.8%inclusion57 decks728 decks
-26%synergy
Raffine's Tower
5.9%inclusion43 decks728 decks
-35%synergy
Silent Clearing
5.5%inclusion40 decks728 decks
3%synergy
Tarnished Citadel
5.2%inclusion38 decks728 decks
4%synergy
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