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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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Mornsong Aria
7.4%inclusion6 decks81 decks
7%synergy
Does Machines
4.1%inclusion3 decks73 decks
4%synergy
Voracious Tome-Skimmer
1.2%inclusion1 decks81 decks
0%synergy
High Synergy Cards
Necromancy
96%inclusion701 decks733 decks
91%synergy
Intuition
91%inclusion670 decks733 decks
90%synergy
Abdel Adrian, Gorion's Ward
90%inclusion660 decks733 decks
88%synergy
Animate Dead
97%inclusion710 decks733 decks
87%synergy
Entomb
94%inclusion687 decks733 decks
87%synergy
Dance of the Dead
89%inclusion649 decks733 decks
86%synergy
Tainted Pact
93%inclusion682 decks733 decks
86%synergy
Dress Down
87%inclusion638 decks733 decks
85%synergy
Silence
93%inclusion680 decks733 decks
83%synergy
Orcish Bowmasters
93%inclusion682 decks733 decks
83%synergy
Top Cards
Mystic Remora
99%inclusion728 decks733 decks
79%synergy
Esper Sentinel
98%inclusion720 decks733 decks
71%synergy
Dark Ritual
95%inclusion696 decks733 decks
75%synergy
Smothering Tithe
94%inclusion692 decks733 decks
63%synergy
Swan Song
91%inclusion668 decks733 decks
71%synergy
Force of Negation
90%inclusion661 decks733 decks
78%synergy
Flusterstorm
89%inclusion656 decks733 decks
81%synergy
Mindbreak Trap
88%inclusion644 decks733 decks
81%synergy
Demonic Consultation
87%inclusion638 decks733 decks
79%synergy
Imperial Seal
86%inclusion628 decks733 decks
78%synergy
Game Changers
Rhystic Study
100%inclusion730 decks733 decks
68%synergy
Vampiric Tutor
99%inclusion725 decks733 decks
82%synergy
Demonic Tutor
99%inclusion725 decks733 decks
78%synergy
Mana Vault
98%inclusion720 decks733 decks
89%synergy
Force of Will
98%inclusion718 decks733 decks
86%synergy
Mox Diamond
98%inclusion718 decks733 decks
91%synergy
Ancient Tomb
97%inclusion712 decks733 decks
84%synergy
Enlightened Tutor
97%inclusion712 decks733 decks
78%synergy
Chrome Mox
97%inclusion712 decks733 decks
88%synergy
Thassa's Oracle
96%inclusion705 decks733 decks
87%synergy
Creatures
Grand Abolisher
85%inclusion623 decks733 decks
70%synergy
Ranger-Captain of Eos
83%inclusion612 decks733 decks
77%synergy
Lotho, Corrupt Shirriff
80%inclusion587 decks733 decks
63%synergy
Valley Floodcaller
74%inclusion546 decks733 decks
71%synergy
Wan Shi Tong, Librarian
60%inclusion79 decks131 decks
55%synergy
Voice of Victory
58%inclusion199 decks346 decks
49%synergy
Opposition Agent
57%inclusion419 decks733 decks
49%synergy
Displacer Kitten
52%inclusion380 decks733 decks
45%synergy
Hullbreaker Horror
49%inclusion359 decks733 decks
43%synergy
Auriok Salvagers
46%inclusion336 decks733 decks
46%synergy
Mockingbird
45%inclusion327 decks733 decks
40%synergy
Drannith Magistrate
44%inclusion320 decks733 decks
36%synergy
Archivist of Oghma
40%inclusion292 decks733 decks
33%synergy
Lurrus of the Dream-Den
35%inclusion257 decks733 decks
34%synergy
Tataru Taru
31%inclusion84 decks268 decks
23%synergy
Ledger Shredder
29%inclusion216 decks733 decks
21%synergy
Talion, the Kindly Lord
28%inclusion203 decks733 decks
20%synergy
Phyrexian Metamorph
25%inclusion184 decks733 decks
17%synergy
Faerie Mastermind
22%inclusion160 decks733 decks
12%synergy
Pollywog Prodigy
21%inclusion157 decks733 decks
18%synergy
Hedron Crab
21%inclusion151 decks733 decks
20%synergy
Psychic Frog
20%inclusion148 decks733 decks
13%synergy
Ghostly Pilferer
13%inclusion98 decks733 decks
6%synergy
Dauthi Voidwalker
13%inclusion97 decks733 decks
7%synergy
Hoarding Broodlord
9.3%inclusion68 decks733 decks
7%synergy
Gilded Drake
9.1%inclusion67 decks733 decks
7%synergy
High Fae Trickster
8.6%inclusion47 decks546 decks
4%synergy
Snapcaster Mage
8.5%inclusion62 decks733 decks
6%synergy
Leonin Relic-Warder
8.0%inclusion59 decks733 decks
8%synergy
Volatile Stormdrake
7.5%inclusion55 decks733 decks
6%synergy
Emet-Selch of the Third Seat
6.3%inclusion17 decks269 decks
-3%synergy
Overlord of the Balemurk
5.3%inclusion39 decks733 decks
3%synergy
Instants
Mental Misstep
85%inclusion624 decks733 decks
78%synergy
Pact of Negation
84%inclusion619 decks733 decks
77%synergy
Borne Upon a Wind
75%inclusion553 decks733 decks
71%synergy
Swords to Plowshares
75%inclusion551 decks733 decks
7%synergy
Fierce Guardianship
74%inclusion542 decks733 decks
53%synergy
Mystical Tutor
69%inclusion508 decks733 decks
58%synergy
Cabal Ritual
64%inclusion469 decks733 decks
61%synergy
An Offer You Can't Refuse
57%inclusion421 decks733 decks
30%synergy
Cyclonic Rift
57%inclusion421 decks733 decks
34%synergy
Chain of Vapor
46%inclusion335 decks733 decks
43%synergy
Mana Drain
37%inclusion270 decks733 decks
20%synergy
Into the Flood Maw
35%inclusion257 decks733 decks
31%synergy
Gifts Ungiven
29%inclusion216 decks733 decks
27%synergy
Ad Nauseam
26%inclusion191 decks733 decks
24%synergy
Sink into Stupor
24%inclusion178 decks733 decks
12%synergy
Culling the Weak
20%inclusion147 decks733 decks
18%synergy
Retraction Helix
18%inclusion133 decks733 decks
17%synergy
Brain Freeze
17%inclusion126 decks733 decks
17%synergy
Path to Exile
16%inclusion116 decks733 decks
-26%synergy
Darkblast
15%inclusion107 decks733 decks
14%synergy
Banishing Knack
11%inclusion82 decks733 decks
11%synergy
Dispel
8.7%inclusion64 decks733 decks
5%synergy
Deadly Rollick
8.5%inclusion62 decks733 decks
-6%synergy
Saw in Half
7.9%inclusion58 decks733 decks
6%synergy
Strix Serenade
7.0%inclusion51 decks733 decks
3%synergy
Orim's Chant
6.7%inclusion49 decks733 decks
5%synergy
Dramatic Reversal
6.5%inclusion48 decks733 decks
5%synergy
Sacrifice
5.9%inclusion43 decks733 decks
5%synergy
Lim-Dûl's Vault
5.7%inclusion42 decks733 decks
3%synergy
Rain of Filth
5.2%inclusion38 decks733 decks
5%synergy
Sorceries
Sevinne's Reclamation
72%inclusion526 decks733 decks
63%synergy
Reanimate
36%inclusion261 decks733 decks
19%synergy
Toxic Deluge
34%inclusion247 decks733 decks
14%synergy
Windfall
30%inclusion222 decks733 decks
17%synergy
Beseech the Mirror
27%inclusion195 decks733 decks
23%synergy
Mnemonic Betrayal
25%inclusion184 decks733 decks
22%synergy
Lively Dirge
21%inclusion157 decks733 decks
20%synergy
Demonic Counsel
16%inclusion115 decks733 decks
15%synergy
Yawgmoth's Will
14%inclusion106 decks733 decks
13%synergy
Praetor's Grasp
11%inclusion80 decks733 decks
8%synergy
Cabal Therapy
10%inclusion75 decks733 decks
10%synergy
Unmarked Grave
10%inclusion73 decks733 decks
9%synergy
Diabolic Intent
10%inclusion72 decks733 decks
5%synergy
Utility Artifacts
The One Ring
83%inclusion605 decks733 decks
69%synergy
Wishclaw Talisman
70%inclusion510 decks733 decks
62%synergy
Cursed Totem
10%inclusion75 decks733 decks
8%synergy
Vexing Bauble
7.9%inclusion58 decks733 decks
6%synergy
Mesmeric Orb
7.6%inclusion56 decks733 decks
7%synergy
Isochron Scepter
6.1%inclusion45 decks733 decks
4%synergy
Sensei's Divining Top
5.7%inclusion42 decks733 decks
-4%synergy
Enchantments
Necropotence
72%inclusion529 decks733 decks
66%synergy
Tinybones Joins Up
62%inclusion458 decks733 decks
61%synergy
Blind Obedience
59%inclusion435 decks733 decks
47%synergy
Copy Artifact
51%inclusion374 decks733 decks
50%synergy
Amphibian Downpour
50%inclusion366 decks733 decks
45%synergy
Ripples of Undeath
48%inclusion351 decks733 decks
45%synergy
Touch the Spirit Realm
42%inclusion309 decks733 decks
40%synergy
The Meathook Massacre
37%inclusion271 decks733 decks
34%synergy
Static Prison
36%inclusion265 decks733 decks
36%synergy
Mirrormade
34%inclusion251 decks733 decks
24%synergy
Steal Enchantment
30%inclusion220 decks733 decks
29%synergy
Chains of Mephistopheles
21%inclusion156 decks733 decks
21%synergy
Trouble in Pairs
20%inclusion149 decks733 decks
15%synergy
Counterbalance
20%inclusion148 decks733 decks
19%synergy
Founding the Third Path
17%inclusion128 decks733 decks
17%synergy
Copy Enchantment
14%inclusion99 decks733 decks
9%synergy
Chthonian Nightmare
12%inclusion91 decks733 decks
12%synergy
Seal of Removal
8.6%inclusion63 decks733 decks
8%synergy
Aura of Silence
7.2%inclusion53 decks733 decks
4%synergy
Power Artifact
7.1%inclusion52 decks733 decks
7%synergy
Monologue Tax
6.8%inclusion50 decks733 decks
1%synergy
Seal of Cleansing
6.8%inclusion50 decks733 decks
5%synergy
Leyline of Anticipation
6.7%inclusion49 decks733 decks
2%synergy
Dance of Many
5.9%inclusion43 decks733 decks
6%synergy
Charitable Levy
5.5%inclusion40 decks733 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
52%inclusion381 decks733 decks
44%synergy
Utility Lands
Otawara, Soaring City
92%inclusion678 decks733 decks
73%synergy
Urza's Saga
45%inclusion331 decks733 decks
33%synergy
Minamo, School at Water's Edge
35%inclusion257 decks733 decks
31%synergy
City of Traitors
30%inclusion218 decks733 decks
28%synergy
Emergence Zone
30%inclusion217 decks733 decks
28%synergy
Serra's Sanctum
24%inclusion179 decks733 decks
23%synergy
Cephalid Coliseum
21%inclusion157 decks733 decks
18%synergy
Takenuma, Abandoned Mire
10%inclusion72 decks733 decks
3%synergy
Urborg, Tomb of Yawgmoth
8.2%inclusion60 decks733 decks
-5%synergy
Hall of Heliod's Generosity
5.9%inclusion43 decks733 decks
-7%synergy
Phyrexian Tower
5.0%inclusion37 decks733 decks
1%synergy
Mana Artifacts
Sol Ring
100%inclusion731 decks733 decks
10%synergy
Arcane Signet
97%inclusion713 decks733 decks
9%synergy
Lotus Petal
96%inclusion701 decks733 decks
85%synergy
Mox Opal
86%inclusion628 decks733 decks
77%synergy
Lion's Eye Diamond
85%inclusion622 decks733 decks
83%synergy
Talisman of Dominance
83%inclusion609 decks733 decks
33%synergy
Fellwar Stone
79%inclusion579 decks733 decks
46%synergy
Grim Monolith
60%inclusion437 decks733 decks
56%synergy
Talisman of Progress
50%inclusion368 decks733 decks
7%synergy
Mox Amber
40%inclusion293 decks733 decks
34%synergy
Talisman of Hierarchy
31%inclusion229 decks733 decks
-13%synergy
Basalt Monolith
7.6%inclusion56 decks733 decks
5%synergy
Lands
Scrubland
100%inclusion731 decks733 decks
84%synergy
Tundra
100%inclusion730 decks733 decks
84%synergy
Underground Sea
99%inclusion729 decks733 decks
84%synergy
Watery Grave
99%inclusion727 decks733 decks
49%synergy
Polluted Delta
99%inclusion726 decks733 decks
61%synergy
Flooded Strand
98%inclusion721 decks733 decks
60%synergy
Hallowed Fountain
98%inclusion719 decks733 decks
48%synergy
Command Tower
98%inclusion718 decks733 decks
5%synergy
Marsh Flats
98%inclusion716 decks733 decks
62%synergy
Godless Shrine
95%inclusion693 decks733 decks
43%synergy
Mana Confluence
94%inclusion688 decks733 decks
80%synergy
Gemstone Caverns
93%inclusion682 decks733 decks
85%synergy
City of Brass
92%inclusion675 decks733 decks
77%synergy
Misty Rainforest
88%inclusion646 decks733 decks
77%synergy
Bloodstained Mire
85%inclusion624 decks733 decks
74%synergy
Verdant Catacombs
85%inclusion623 decks733 decks
75%synergy
Scalding Tarn
84%inclusion613 decks733 decks
73%synergy
Windswept Heath
73%inclusion532 decks733 decks
63%synergy
Arid Mesa
68%inclusion499 decks733 decks
58%synergy
Exotic Orchard
67%inclusion489 decks733 decks
8%synergy
Morphic Pool
64%inclusion470 decks733 decks
30%synergy
Undercity Sewers
57%inclusion415 decks733 decks
42%synergy
Sea of Clouds
50%inclusion370 decks733 decks
15%synergy
Vault of Champions
39%inclusion288 decks733 decks
7%synergy
Starting Town
36%inclusion97 decks269 decks
32%synergy
Island
35%inclusion260 decks733 decks
-57%synergy
Swamp
27%inclusion199 decks733 decks
-64%synergy
Sink into Stupor
24%inclusion178 decks733 decks
12%synergy
Meticulous Archive
23%inclusion171 decks733 decks
9%synergy
Forbidden Orchard
19%inclusion142 decks733 decks
17%synergy
Plains
19%inclusion137 decks733 decks
-73%synergy
Cavern of Souls
18%inclusion132 decks733 decks
11%synergy
Spire of Industry
17%inclusion127 decks733 decks
9%synergy
Shadowy Backstreet
16%inclusion120 decks733 decks
4%synergy
Talon Gates of Madara
13%inclusion93 decks733 decks
11%synergy
Underground River
8.0%inclusion59 decks733 decks
-26%synergy
Raffine's Tower
6.0%inclusion44 decks733 decks
-35%synergy
Tarnished Citadel
5.7%inclusion42 decks733 decks
5%synergy
Silent Clearing
5.7%inclusion42 decks733 decks
3%synergy
Gloomlake Verge
5.0%inclusion37 decks733 decks
-6%synergy
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