The Master of Keys (Commander) - cEDH

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
49%inclusion21 decks43 decks
45%synergy
Avatar's Wrath
2.4%inclusion1 decks42 decks
1%synergy
High Synergy Cards
Necromancy
95%inclusion523 decks551 decks
90%synergy
Abdel Adrian, Gorion's Ward
90%inclusion498 decks551 decks
89%synergy
Entomb
95%inclusion525 decks551 decks
88%synergy
Animate Dead
98%inclusion540 decks551 decks
88%synergy
Dance of the Dead
89%inclusion490 decks551 decks
87%synergy
Dress Down
87%inclusion479 decks551 decks
84%synergy
Tainted Pact
91%inclusion500 decks551 decks
83%synergy
Silence
93%inclusion510 decks551 decks
82%synergy
Demonic Consultation
88%inclusion487 decks551 decks
80%synergy
Flusterstorm
88%inclusion485 decks551 decks
80%synergy
Top Cards
Mystic Remora
98%inclusion540 decks551 decks
76%synergy
Esper Sentinel
96%inclusion527 decks551 decks
68%synergy
Dark Ritual
95%inclusion522 decks551 decks
76%synergy
Swan Song
90%inclusion497 decks551 decks
71%synergy
Orcish Bowmasters
89%inclusion493 decks551 decks
78%synergy
Grand Abolisher
89%inclusion488 decks551 decks
74%synergy
Force of Negation
86%inclusion474 decks551 decks
74%synergy
Mindbreak Trap
85%inclusion470 decks551 decks
78%synergy
The One Ring
82%inclusion454 decks551 decks
69%synergy
Intuition
80%inclusion442 decks551 decks
78%synergy
Game Changers
Rhystic Study
97%inclusion535 decks551 decks
64%synergy
Demonic Tutor
97%inclusion534 decks551 decks
75%synergy
Vampiric Tutor
96%inclusion530 decks551 decks
78%synergy
Thassa's Oracle
96%inclusion527 decks551 decks
86%synergy
Enlightened Tutor
95%inclusion525 decks551 decks
75%synergy
Mana Vault
95%inclusion523 decks551 decks
85%synergy
Chrome Mox
93%inclusion515 decks551 decks
84%synergy
Force of Will
93%inclusion513 decks551 decks
80%synergy
Smothering Tithe
92%inclusion508 decks551 decks
60%synergy
Ancient Tomb
91%inclusion502 decks551 decks
78%synergy
Creatures
Ranger-Captain of Eos
80%inclusion442 decks551 decks
74%synergy
Lotho, Corrupt Shirriff
78%inclusion432 decks551 decks
62%synergy
Valley Floodcaller
75%inclusion412 decks551 decks
70%synergy
Opposition Agent
59%inclusion327 decks551 decks
50%synergy
Displacer Kitten
57%inclusion314 decks551 decks
50%synergy
Voice of Victory
50%inclusion154 decks307 decks
42%synergy
Hullbreaker Horror
48%inclusion265 decks551 decks
42%synergy
Archivist of Oghma
44%inclusion244 decks551 decks
37%synergy
Drannith Magistrate
43%inclusion238 decks551 decks
35%synergy
Mockingbird
41%inclusion226 decks551 decks
37%synergy
Auriok Salvagers
39%inclusion215 decks551 decks
39%synergy
Lurrus of the Dream-Den
38%inclusion211 decks551 decks
37%synergy
Ledger Shredder
34%inclusion185 decks551 decks
25%synergy
Talion, the Kindly Lord
28%inclusion155 decks551 decks
20%synergy
Phyrexian Metamorph
28%inclusion152 decks551 decks
19%synergy
Tataru Taru
23%inclusion48 decks211 decks
15%synergy
Hedron Crab
22%inclusion123 decks551 decks
22%synergy
Pollywog Prodigy
22%inclusion119 decks551 decks
17%synergy
Faerie Mastermind
22%inclusion119 decks551 decks
12%synergy
Psychic Frog
22%inclusion119 decks551 decks
15%synergy
Dauthi Voidwalker
14%inclusion76 decks551 decks
8%synergy
Hoarding Broodlord
13%inclusion72 decks551 decks
11%synergy
Ghostly Pilferer
12%inclusion67 decks551 decks
5%synergy
Leonin Relic-Warder
11%inclusion58 decks551 decks
10%synergy
Volatile Stormdrake
9.3%inclusion51 decks551 decks
8%synergy
High Fae Trickster
8.9%inclusion42 decks472 decks
4%synergy
Snapcaster Mage
8.0%inclusion44 decks551 decks
6%synergy
Emet-Selch of the Third Seat
6.6%inclusion14 decks211 decks
-3%synergy
Gilded Drake
6.4%inclusion35 decks551 decks
5%synergy
Phantasmal Image
6.2%inclusion34 decks551 decks
3%synergy
Overlord of the Balemurk
5.3%inclusion29 decks551 decks
3%synergy
Spellseeker
5.3%inclusion29 decks551 decks
4%synergy
Entity Tracker
5.1%inclusion28 decks551 decks
-2%synergy
Instants
Mental Misstep
80%inclusion440 decks551 decks
73%synergy
Pact of Negation
79%inclusion438 decks551 decks
71%synergy
Swords to Plowshares
79%inclusion435 decks551 decks
11%synergy
Fierce Guardianship
73%inclusion400 decks551 decks
52%synergy
Borne Upon a Wind
71%inclusion390 decks551 decks
66%synergy
Mystical Tutor
67%inclusion369 decks551 decks
55%synergy
An Offer You Can't Refuse
64%inclusion351 decks551 decks
37%synergy
Cyclonic Rift
60%inclusion330 decks551 decks
35%synergy
Cabal Ritual
55%inclusion304 decks551 decks
52%synergy
Chain of Vapor
41%inclusion224 decks551 decks
37%synergy
Into the Flood Maw
40%inclusion222 decks551 decks
37%synergy
Mana Drain
35%inclusion191 decks551 decks
17%synergy
Gifts Ungiven
34%inclusion187 decks551 decks
32%synergy
Sink into Stupor
32%inclusion174 decks551 decks
19%synergy
Ad Nauseam
21%inclusion113 decks551 decks
18%synergy
Retraction Helix
20%inclusion108 decks551 decks
19%synergy
Path to Exile
17%inclusion96 decks551 decks
-24%synergy
Culling the Weak
17%inclusion94 decks551 decks
15%synergy
Brain Freeze
14%inclusion75 decks551 decks
13%synergy
Darkblast
13%inclusion70 decks551 decks
13%synergy
Banishing Knack
13%inclusion69 decks551 decks
12%synergy
Dispel
12%inclusion65 decks551 decks
8%synergy
Saw in Half
11%inclusion59 decks551 decks
9%synergy
Strix Serenade
10%inclusion54 decks551 decks
6%synergy
Deadly Rollick
8.7%inclusion48 decks551 decks
-5%synergy
Sacrifice
7.8%inclusion43 decks551 decks
7%synergy
Muddle the Mixture
7.8%inclusion43 decks551 decks
4%synergy
Spell Pierce
6.5%inclusion36 decks551 decks
4%synergy
Lim-Dûl's Vault
6.0%inclusion33 decks551 decks
2%synergy
Angel's Grace
5.4%inclusion30 decks551 decks
3%synergy
Dovin's Veto
5.3%inclusion29 decks551 decks
-19%synergy
Orim's Chant
5.3%inclusion29 decks551 decks
4%synergy
Counterspell
5.3%inclusion29 decks551 decks
-36%synergy
Dismember
5.3%inclusion29 decks551 decks
0%synergy
Rain of Filth
5.3%inclusion29 decks551 decks
5%synergy
Sorceries
Imperial Seal
77%inclusion424 decks551 decks
69%synergy
Sevinne's Reclamation
71%inclusion389 decks551 decks
62%synergy
Toxic Deluge
40%inclusion219 decks551 decks
20%synergy
Reanimate
36%inclusion197 decks551 decks
20%synergy
Windfall
29%inclusion161 decks551 decks
15%synergy
Lively Dirge
26%inclusion141 decks551 decks
24%synergy
Beseech the Mirror
25%inclusion137 decks551 decks
21%synergy
Mnemonic Betrayal
21%inclusion116 decks551 decks
18%synergy
Demonic Counsel
19%inclusion103 decks551 decks
18%synergy
Unmarked Grave
11%inclusion62 decks551 decks
10%synergy
Yawgmoth's Will
10%inclusion54 decks551 decks
8%synergy
Cabal Therapy
9.1%inclusion50 decks551 decks
9%synergy
Praetor's Grasp
8.5%inclusion47 decks551 decks
6%synergy
Diabolic Intent
8.2%inclusion45 decks551 decks
3%synergy
Utility Artifacts
Wishclaw Talisman
71%inclusion389 decks551 decks
62%synergy
Cursed Totem
11%inclusion62 decks551 decks
9%synergy
Mesmeric Orb
8.7%inclusion48 decks551 decks
8%synergy
Vexing Bauble
7.4%inclusion41 decks551 decks
6%synergy
Sensei's Divining Top
5.1%inclusion28 decks551 decks
-5%synergy
Enchantments
Necropotence
67%inclusion370 decks551 decks
60%synergy
Tinybones Joins Up
67%inclusion367 decks551 decks
65%synergy
Blind Obedience
63%inclusion347 decks551 decks
50%synergy
Ripples of Undeath
52%inclusion284 decks551 decks
49%synergy
Amphibian Downpour
52%inclusion284 decks551 decks
47%synergy
Touch the Spirit Realm
43%inclusion238 decks551 decks
41%synergy
Copy Artifact
42%inclusion232 decks551 decks
41%synergy
Mirrormade
37%inclusion203 decks551 decks
27%synergy
The Meathook Massacre
36%inclusion201 decks551 decks
33%synergy
Static Prison
36%inclusion200 decks551 decks
36%synergy
Steal Enchantment
30%inclusion163 decks551 decks
29%synergy
Counterbalance
18%inclusion101 decks551 decks
17%synergy
Trouble in Pairs
18%inclusion98 decks551 decks
12%synergy
Founding the Third Path
16%inclusion86 decks551 decks
15%synergy
Chthonian Nightmare
12%inclusion67 decks551 decks
12%synergy
Copy Enchantment
12%inclusion66 decks551 decks
7%synergy
Chains of Mephistopheles
12%inclusion64 decks551 decks
11%synergy
Monologue Tax
8.9%inclusion49 decks551 decks
3%synergy
Seal of Removal
8.2%inclusion45 decks551 decks
8%synergy
Leyline of Anticipation
7.1%inclusion39 decks551 decks
3%synergy
Seal of Cleansing
6.0%inclusion33 decks551 decks
4%synergy
Aura of Silence
5.6%inclusion31 decks551 decks
2%synergy
Second Chance
5.3%inclusion29 decks551 decks
5%synergy
Dance of Many
5.1%inclusion28 decks551 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
56%inclusion306 decks551 decks
47%synergy
Tezzeret, Cruel Captain
6.0%inclusion9 decks151 decks
4%synergy
Utility Lands
Otawara, Soaring City
88%inclusion484 decks551 decks
69%synergy
Urza's Saga
40%inclusion219 decks551 decks
28%synergy
Minamo, School at Water's Edge
33%inclusion183 decks551 decks
29%synergy
Emergence Zone
28%inclusion157 decks551 decks
26%synergy
Cephalid Coliseum
21%inclusion113 decks551 decks
17%synergy
City of Traitors
14%inclusion78 decks551 decks
13%synergy
Serra's Sanctum
12%inclusion65 decks551 decks
10%synergy
Takenuma, Abandoned Mire
11%inclusion61 decks551 decks
5%synergy
Urborg, Tomb of Yawgmoth
8.7%inclusion48 decks551 decks
-5%synergy
Hall of Heliod's Generosity
6.7%inclusion37 decks551 decks
-6%synergy
Mistrise Village
6.6%inclusion20 decks304 decks
3%synergy
Mana Artifacts
Sol Ring
100%inclusion549 decks551 decks
10%synergy
Arcane Signet
98%inclusion538 decks551 decks
10%synergy
Lotus Petal
93%inclusion515 decks551 decks
83%synergy
Talisman of Dominance
86%inclusion473 decks551 decks
37%synergy
Mox Diamond
82%inclusion454 decks551 decks
75%synergy
Fellwar Stone
82%inclusion450 decks551 decks
47%synergy
Mox Opal
79%inclusion438 decks551 decks
71%synergy
Lion's Eye Diamond
66%inclusion366 decks551 decks
64%synergy
Talisman of Progress
56%inclusion311 decks551 decks
14%synergy
Mox Amber
40%inclusion222 decks551 decks
34%synergy
Talisman of Hierarchy
40%inclusion222 decks551 decks
-3%synergy
Grim Monolith
36%inclusion198 decks551 decks
32%synergy
Basalt Monolith
6.9%inclusion38 decks551 decks
5%synergy
Lands
Command Tower
98%inclusion540 decks551 decks
6%synergy
Polluted Delta
96%inclusion530 decks551 decks
59%synergy
Watery Grave
96%inclusion529 decks551 decks
47%synergy
Hallowed Fountain
95%inclusion524 decks551 decks
46%synergy
Flooded Strand
94%inclusion520 decks551 decks
57%synergy
Godless Shrine
94%inclusion517 decks551 decks
44%synergy
Marsh Flats
93%inclusion515 decks551 decks
57%synergy
City of Brass
88%inclusion486 decks551 decks
73%synergy
Gemstone Caverns
88%inclusion484 decks551 decks
80%synergy
Mana Confluence
87%inclusion480 decks551 decks
73%synergy
Tundra
85%inclusion470 decks551 decks
69%synergy
Scrubland
85%inclusion469 decks551 decks
69%synergy
Underground Sea
83%inclusion455 decks551 decks
67%synergy
Misty Rainforest
82%inclusion450 decks551 decks
70%synergy
Bloodstained Mire
81%inclusion446 decks551 decks
70%synergy
Verdant Catacombs
78%inclusion432 decks551 decks
68%synergy
Scalding Tarn
74%inclusion409 decks551 decks
63%synergy
Exotic Orchard
71%inclusion391 decks551 decks
13%synergy
Windswept Heath
71%inclusion390 decks551 decks
61%synergy
Morphic Pool
68%inclusion373 decks551 decks
33%synergy
Arid Mesa
62%inclusion342 decks551 decks
52%synergy
Undercity Sewers
56%inclusion310 decks551 decks
42%synergy
Sea of Clouds
55%inclusion303 decks551 decks
19%synergy
Vault of Champions
47%inclusion259 decks551 decks
14%synergy
Island
45%inclusion247 decks551 decks
-48%synergy
Swamp
38%inclusion212 decks551 decks
-53%synergy
Sink into Stupor
32%inclusion174 decks551 decks
19%synergy
Plains
28%inclusion157 decks551 decks
-63%synergy
Starting Town
25%inclusion53 decks211 decks
21%synergy
Meticulous Archive
25%inclusion138 decks551 decks
12%synergy
Forbidden Orchard
21%inclusion117 decks551 decks
19%synergy
Spire of Industry
19%inclusion107 decks551 decks
11%synergy
Shadowy Backstreet
18%inclusion101 decks551 decks
6%synergy
Cavern of Souls
18%inclusion97 decks551 decks
11%synergy
Underground River
15%inclusion85 decks551 decks
-17%synergy
Talon Gates of Madara
12%inclusion68 decks551 decks
11%synergy
Caves of Koilos
11%inclusion60 decks551 decks
-24%synergy
Adarkar Wastes
11%inclusion59 decks551 decks
-20%synergy
Gloomlake Verge
9.1%inclusion50 decks551 decks
-2%synergy
Raffine's Tower
8.2%inclusion45 decks551 decks
-33%synergy
Floodfarm Verge
7.3%inclusion40 decks551 decks
-4%synergy
Reflecting Pool
5.6%inclusion31 decks551 decks
-2%synergy
Silent Clearing
5.4%inclusion30 decks551 decks
3%synergy
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