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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Wan Shi Tong, Librarian
50%inclusion21 decks42 decks
46%synergy
High Synergy Cards
Necromancy
95%inclusion608 decks640 decks
90%synergy
Intuition
90%inclusion578 decks640 decks
89%synergy
Abdel Adrian, Gorion's Ward
90%inclusion577 decks640 decks
88%synergy
Animate Dead
97%inclusion623 decks640 decks
87%synergy
Dance of the Dead
89%inclusion570 decks640 decks
87%synergy
Entomb
94%inclusion600 decks640 decks
87%synergy
Tainted Pact
93%inclusion594 decks640 decks
85%synergy
Dress Down
87%inclusion558 decks640 decks
85%synergy
Orcish Bowmasters
93%inclusion598 decks640 decks
82%synergy
Silence
92%inclusion589 decks640 decks
82%synergy
Top Cards
Mystic Remora
99%inclusion636 decks640 decks
78%synergy
Esper Sentinel
98%inclusion629 decks640 decks
70%synergy
Dark Ritual
95%inclusion605 decks640 decks
75%synergy
Smothering Tithe
94%inclusion603 decks640 decks
62%synergy
Swan Song
91%inclusion582 decks640 decks
72%synergy
Force of Negation
91%inclusion582 decks640 decks
79%synergy
Flusterstorm
89%inclusion572 decks640 decks
81%synergy
Mindbreak Trap
87%inclusion558 decks640 decks
80%synergy
Demonic Consultation
86%inclusion552 decks640 decks
78%synergy
Imperial Seal
86%inclusion549 decks640 decks
78%synergy
Game Changers
Rhystic Study
99%inclusion636 decks640 decks
67%synergy
Demonic Tutor
99%inclusion631 decks640 decks
77%synergy
Vampiric Tutor
98%inclusion629 decks640 decks
80%synergy
Mana Vault
98%inclusion627 decks640 decks
88%synergy
Force of Will
98%inclusion627 decks640 decks
85%synergy
Mox Diamond
97%inclusion622 decks640 decks
90%synergy
Ancient Tomb
97%inclusion620 decks640 decks
83%synergy
Enlightened Tutor
97%inclusion619 decks640 decks
76%synergy
Chrome Mox
97%inclusion619 decks640 decks
87%synergy
Thassa's Oracle
96%inclusion615 decks640 decks
86%synergy
Creatures
Grand Abolisher
84%inclusion540 decks640 decks
70%synergy
Ranger-Captain of Eos
84%inclusion536 decks640 decks
77%synergy
Lotho, Corrupt Shirriff
79%inclusion506 decks640 decks
62%synergy
Valley Floodcaller
74%inclusion471 decks640 decks
69%synergy
Opposition Agent
57%inclusion365 decks640 decks
48%synergy
Voice of Victory
54%inclusion143 decks266 decks
46%synergy
Displacer Kitten
53%inclusion341 decks640 decks
46%synergy
Hullbreaker Horror
50%inclusion320 decks640 decks
44%synergy
Auriok Salvagers
46%inclusion297 decks640 decks
46%synergy
Drannith Magistrate
44%inclusion282 decks640 decks
36%synergy
Mockingbird
43%inclusion277 decks640 decks
39%synergy
Archivist of Oghma
40%inclusion258 decks640 decks
33%synergy
Lurrus of the Dream-Den
35%inclusion227 decks640 decks
34%synergy
Ledger Shredder
31%inclusion201 decks640 decks
22%synergy
Talion, the Kindly Lord
30%inclusion189 decks640 decks
21%synergy
Phyrexian Metamorph
28%inclusion177 decks640 decks
19%synergy
Tataru Taru
24%inclusion45 decks189 decks
16%synergy
Pollywog Prodigy
23%inclusion150 decks640 decks
19%synergy
Psychic Frog
22%inclusion138 decks640 decks
15%synergy
Hedron Crab
20%inclusion127 decks640 decks
19%synergy
Faerie Mastermind
18%inclusion115 decks640 decks
9%synergy
Dauthi Voidwalker
13%inclusion85 decks640 decks
7%synergy
Ghostly Pilferer
12%inclusion77 decks640 decks
5%synergy
Hoarding Broodlord
10%inclusion65 decks640 decks
8%synergy
High Fae Trickster
9.3%inclusion43 decks464 decks
5%synergy
Snapcaster Mage
9.1%inclusion58 decks640 decks
7%synergy
Gilded Drake
8.9%inclusion57 decks640 decks
7%synergy
Leonin Relic-Warder
8.4%inclusion54 decks640 decks
8%synergy
Emet-Selch of the Third Seat
8.4%inclusion16 decks190 decks
-2%synergy
Volatile Stormdrake
8.1%inclusion52 decks640 decks
7%synergy
Overlord of the Balemurk
6.4%inclusion41 decks640 decks
4%synergy
Instants
Mental Misstep
84%inclusion537 decks640 decks
77%synergy
Pact of Negation
83%inclusion531 decks640 decks
75%synergy
Swords to Plowshares
75%inclusion483 decks640 decks
7%synergy
Fierce Guardianship
75%inclusion482 decks640 decks
55%synergy
Borne Upon a Wind
73%inclusion470 decks640 decks
69%synergy
Mystical Tutor
69%inclusion442 decks640 decks
57%synergy
Cabal Ritual
62%inclusion396 decks640 decks
58%synergy
Cyclonic Rift
60%inclusion381 decks640 decks
35%synergy
An Offer You Can't Refuse
57%inclusion363 decks640 decks
30%synergy
Chain of Vapor
46%inclusion295 decks640 decks
43%synergy
Mana Drain
39%inclusion247 decks640 decks
21%synergy
Into the Flood Maw
33%inclusion213 decks640 decks
30%synergy
Gifts Ungiven
26%inclusion168 decks640 decks
24%synergy
Sink into Stupor
25%inclusion162 decks640 decks
13%synergy
Ad Nauseam
25%inclusion157 decks640 decks
22%synergy
Culling the Weak
18%inclusion118 decks640 decks
17%synergy
Retraction Helix
18%inclusion116 decks640 decks
17%synergy
Brain Freeze
18%inclusion113 decks640 decks
17%synergy
Path to Exile
16%inclusion101 decks640 decks
-26%synergy
Darkblast
15%inclusion95 decks640 decks
15%synergy
Banishing Knack
12%inclusion74 decks640 decks
11%synergy
Dispel
9.2%inclusion59 decks640 decks
5%synergy
Strix Serenade
8.3%inclusion53 decks640 decks
4%synergy
Saw in Half
8.1%inclusion52 decks640 decks
6%synergy
Deadly Rollick
7.7%inclusion49 decks640 decks
-6%synergy
Sacrifice
6.3%inclusion40 decks640 decks
6%synergy
Dramatic Reversal
6.1%inclusion39 decks640 decks
4%synergy
Lim-Dûl's Vault
5.6%inclusion36 decks640 decks
2%synergy
Angel's Grace
5.5%inclusion35 decks640 decks
3%synergy
Sorceries
Sevinne's Reclamation
71%inclusion454 decks640 decks
62%synergy
Reanimate
36%inclusion233 decks640 decks
21%synergy
Toxic Deluge
36%inclusion229 decks640 decks
16%synergy
Windfall
30%inclusion194 decks640 decks
16%synergy
Beseech the Mirror
25%inclusion162 decks640 decks
21%synergy
Mnemonic Betrayal
24%inclusion154 decks640 decks
21%synergy
Lively Dirge
22%inclusion140 decks640 decks
21%synergy
Demonic Counsel
16%inclusion101 decks640 decks
15%synergy
Yawgmoth's Will
15%inclusion94 decks640 decks
13%synergy
Unmarked Grave
11%inclusion69 decks640 decks
9%synergy
Praetor's Grasp
10%inclusion67 decks640 decks
8%synergy
Cabal Therapy
10%inclusion66 decks640 decks
10%synergy
Diabolic Intent
10%inclusion64 decks640 decks
5%synergy
Utility Artifacts
The One Ring
85%inclusion545 decks640 decks
71%synergy
Wishclaw Talisman
68%inclusion438 decks640 decks
60%synergy
Cursed Totem
10%inclusion66 decks640 decks
8%synergy
Vexing Bauble
9.2%inclusion59 decks640 decks
7%synergy
Mesmeric Orb
8.1%inclusion52 decks640 decks
7%synergy
Sensei's Divining Top
6.4%inclusion41 decks640 decks
-4%synergy
Isochron Scepter
5.8%inclusion37 decks640 decks
3%synergy
Enchantments
Necropotence
70%inclusion448 decks640 decks
63%synergy
Tinybones Joins Up
62%inclusion396 decks640 decks
61%synergy
Blind Obedience
59%inclusion378 decks640 decks
47%synergy
Copy Artifact
52%inclusion335 decks640 decks
51%synergy
Amphibian Downpour
48%inclusion309 decks640 decks
44%synergy
Ripples of Undeath
47%inclusion302 decks640 decks
44%synergy
Touch the Spirit Realm
44%inclusion279 decks640 decks
41%synergy
Static Prison
37%inclusion237 decks640 decks
37%synergy
The Meathook Massacre
36%inclusion231 decks640 decks
33%synergy
Mirrormade
32%inclusion204 decks640 decks
22%synergy
Steal Enchantment
31%inclusion199 decks640 decks
30%synergy
Chains of Mephistopheles
23%inclusion147 decks640 decks
23%synergy
Trouble in Pairs
22%inclusion140 decks640 decks
16%synergy
Counterbalance
20%inclusion126 decks640 decks
18%synergy
Founding the Third Path
16%inclusion102 decks640 decks
16%synergy
Chthonian Nightmare
14%inclusion87 decks640 decks
13%synergy
Copy Enchantment
12%inclusion75 decks640 decks
7%synergy
Seal of Removal
10%inclusion61 decks640 decks
9%synergy
Power Artifact
7.3%inclusion47 decks640 decks
7%synergy
Seal of Cleansing
7.3%inclusion47 decks640 decks
6%synergy
Aura of Silence
7.2%inclusion46 decks640 decks
4%synergy
Monologue Tax
7.0%inclusion45 decks640 decks
1%synergy
Dance of Many
6.6%inclusion42 decks640 decks
6%synergy
Leyline of Anticipation
6.1%inclusion39 decks640 decks
2%synergy
Charitable Levy
6.1%inclusion39 decks640 decks
6%synergy
Second Chance
5.3%inclusion34 decks640 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
53%inclusion342 decks640 decks
45%synergy
Utility Lands
Otawara, Soaring City
92%inclusion591 decks640 decks
73%synergy
Urza's Saga
45%inclusion291 decks640 decks
34%synergy
Minamo, School at Water's Edge
36%inclusion228 decks640 decks
32%synergy
Emergence Zone
30%inclusion191 decks640 decks
28%synergy
City of Traitors
27%inclusion173 decks640 decks
26%synergy
Serra's Sanctum
25%inclusion162 decks640 decks
24%synergy
Cephalid Coliseum
22%inclusion140 decks640 decks
18%synergy
Takenuma, Abandoned Mire
11%inclusion68 decks640 decks
4%synergy
Urborg, Tomb of Yawgmoth
8.8%inclusion56 decks640 decks
-5%synergy
Hall of Heliod's Generosity
6.4%inclusion41 decks640 decks
-7%synergy
Mana Artifacts
Sol Ring
100%inclusion637 decks640 decks
10%synergy
Arcane Signet
97%inclusion621 decks640 decks
9%synergy
Lotus Petal
95%inclusion611 decks640 decks
85%synergy
Mox Opal
87%inclusion554 decks640 decks
78%synergy
Talisman of Dominance
84%inclusion540 decks640 decks
35%synergy
Lion's Eye Diamond
84%inclusion537 decks640 decks
82%synergy
Fellwar Stone
79%inclusion507 decks640 decks
45%synergy
Grim Monolith
61%inclusion392 decks640 decks
58%synergy
Talisman of Progress
52%inclusion332 decks640 decks
9%synergy
Mox Amber
40%inclusion253 decks640 decks
33%synergy
Talisman of Hierarchy
32%inclusion202 decks640 decks
-11%synergy
Basalt Monolith
7.8%inclusion50 decks640 decks
6%synergy
Lands
Tundra
100%inclusion637 decks640 decks
84%synergy
Underground Sea
100%inclusion637 decks640 decks
84%synergy
Scrubland
100%inclusion637 decks640 decks
84%synergy
Watery Grave
99%inclusion635 decks640 decks
50%synergy
Polluted Delta
99%inclusion634 decks640 decks
62%synergy
Flooded Strand
98%inclusion630 decks640 decks
61%synergy
Hallowed Fountain
98%inclusion629 decks640 decks
49%synergy
Command Tower
98%inclusion628 decks640 decks
6%synergy
Marsh Flats
98%inclusion624 decks640 decks
61%synergy
Godless Shrine
94%inclusion603 decks640 decks
44%synergy
Mana Confluence
94%inclusion599 decks640 decks
80%synergy
Gemstone Caverns
92%inclusion591 decks640 decks
84%synergy
City of Brass
92%inclusion587 decks640 decks
76%synergy
Misty Rainforest
89%inclusion567 decks640 decks
77%synergy
Bloodstained Mire
85%inclusion544 decks640 decks
74%synergy
Verdant Catacombs
85%inclusion541 decks640 decks
74%synergy
Scalding Tarn
83%inclusion534 decks640 decks
72%synergy
Windswept Heath
73%inclusion466 decks640 decks
63%synergy
Arid Mesa
68%inclusion438 decks640 decks
58%synergy
Exotic Orchard
68%inclusion435 decks640 decks
10%synergy
Morphic Pool
64%inclusion408 decks640 decks
29%synergy
Undercity Sewers
56%inclusion360 decks640 decks
42%synergy
Sea of Clouds
51%inclusion324 decks640 decks
15%synergy
Vault of Champions
40%inclusion254 decks640 decks
7%synergy
Island
37%inclusion239 decks640 decks
-55%synergy
Swamp
28%inclusion182 decks640 decks
-63%synergy
Starting Town
28%inclusion53 decks190 decks
24%synergy
Sink into Stupor
25%inclusion162 decks640 decks
13%synergy
Meticulous Archive
24%inclusion156 decks640 decks
11%synergy
Plains
19%inclusion122 decks640 decks
-72%synergy
Forbidden Orchard
19%inclusion120 decks640 decks
16%synergy
Cavern of Souls
18%inclusion118 decks640 decks
12%synergy
Spire of Industry
18%inclusion114 decks640 decks
9%synergy
Shadowy Backstreet
16%inclusion101 decks640 decks
3%synergy
Talon Gates of Madara
13%inclusion85 decks640 decks
12%synergy
Underground River
9.1%inclusion58 decks640 decks
-23%synergy
Raffine's Tower
6.3%inclusion40 decks640 decks
-35%synergy
Gloomlake Verge
5.8%inclusion37 decks640 decks
-5%synergy
Silent Clearing
5.2%inclusion33 decks640 decks
3%synergy
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