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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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
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Mornsong Aria
8.8%inclusion3 decks34 decks
8%synergy
Voracious Tome-Skimmer
2.9%inclusion1 decks34 decks
2%synergy
High Synergy Cards
Necromancy
95%inclusion548 decks575 decks
91%synergy
Abdel Adrian, Gorion's Ward
90%inclusion520 decks575 decks
89%synergy
Entomb
95%inclusion548 decks575 decks
88%synergy
Animate Dead
98%inclusion562 decks575 decks
88%synergy
Dance of the Dead
89%inclusion511 decks575 decks
87%synergy
Dress Down
87%inclusion501 decks575 decks
85%synergy
Tainted Pact
91%inclusion524 decks575 decks
84%synergy
Silence
93%inclusion533 decks575 decks
82%synergy
Demonic Consultation
89%inclusion510 decks575 decks
80%synergy
Flusterstorm
88%inclusion507 decks575 decks
80%synergy
Top Cards
Mystic Remora
98%inclusion563 decks575 decks
77%synergy
Esper Sentinel
95%inclusion548 decks575 decks
68%synergy
Dark Ritual
94%inclusion541 decks575 decks
75%synergy
Swan Song
90%inclusion516 decks575 decks
70%synergy
Orcish Bowmasters
89%inclusion514 decks575 decks
79%synergy
Grand Abolisher
88%inclusion508 decks575 decks
74%synergy
Force of Negation
86%inclusion495 decks575 decks
74%synergy
Mindbreak Trap
86%inclusion493 decks575 decks
79%synergy
The One Ring
81%inclusion467 decks575 decks
68%synergy
Intuition
81%inclusion465 decks575 decks
79%synergy
Game Changers
Rhystic Study
97%inclusion559 decks575 decks
65%synergy
Demonic Tutor
97%inclusion556 decks575 decks
76%synergy
Vampiric Tutor
96%inclusion554 decks575 decks
79%synergy
Thassa's Oracle
95%inclusion549 decks575 decks
86%synergy
Enlightened Tutor
95%inclusion548 decks575 decks
76%synergy
Mana Vault
95%inclusion546 decks575 decks
86%synergy
Chrome Mox
94%inclusion538 decks575 decks
84%synergy
Force of Will
93%inclusion536 decks575 decks
81%synergy
Smothering Tithe
92%inclusion530 decks575 decks
60%synergy
Ancient Tomb
91%inclusion524 decks575 decks
78%synergy
Creatures
Ranger-Captain of Eos
80%inclusion459 decks575 decks
73%synergy
Lotho, Corrupt Shirriff
78%inclusion450 decks575 decks
61%synergy
Valley Floodcaller
74%inclusion427 decks575 decks
70%synergy
Opposition Agent
58%inclusion336 decks575 decks
50%synergy
Displacer Kitten
56%inclusion324 decks575 decks
49%synergy
Voice of Victory
53%inclusion177 decks335 decks
44%synergy
Wan Shi Tong, Librarian
48%inclusion42 decks87 decks
43%synergy
Hullbreaker Horror
47%inclusion270 decks575 decks
41%synergy
Archivist of Oghma
44%inclusion253 decks575 decks
37%synergy
Drannith Magistrate
43%inclusion246 decks575 decks
35%synergy
Mockingbird
41%inclusion236 decks575 decks
37%synergy
Auriok Salvagers
38%inclusion221 decks575 decks
38%synergy
Lurrus of the Dream-Den
38%inclusion217 decks575 decks
36%synergy
Ledger Shredder
32%inclusion186 decks575 decks
24%synergy
Talion, the Kindly Lord
27%inclusion154 decks575 decks
19%synergy
Phyrexian Metamorph
26%inclusion152 decks575 decks
18%synergy
Tataru Taru
26%inclusion62 decks242 decks
17%synergy
Faerie Mastermind
23%inclusion131 decks575 decks
13%synergy
Hedron Crab
23%inclusion130 decks575 decks
22%synergy
Pollywog Prodigy
21%inclusion118 decks575 decks
16%synergy
Psychic Frog
20%inclusion117 decks575 decks
13%synergy
Dauthi Voidwalker
14%inclusion80 decks575 decks
8%synergy
Ghostly Pilferer
13%inclusion74 decks575 decks
6%synergy
Hoarding Broodlord
12%inclusion68 decks575 decks
10%synergy
Leonin Relic-Warder
11%inclusion61 decks575 decks
10%synergy
Volatile Stormdrake
9.2%inclusion53 decks575 decks
8%synergy
High Fae Trickster
8.7%inclusion43 decks497 decks
4%synergy
Snapcaster Mage
7.8%inclusion45 decks575 decks
6%synergy
Gilded Drake
6.6%inclusion38 decks575 decks
5%synergy
Emet-Selch of the Third Seat
5.4%inclusion13 decks242 decks
-4%synergy
Spellseeker
5.2%inclusion30 decks575 decks
4%synergy
Phantasmal Image
5.2%inclusion30 decks575 decks
3%synergy
Overlord of the Balemurk
5.0%inclusion29 decks575 decks
3%synergy
Instants
Mental Misstep
80%inclusion461 decks575 decks
73%synergy
Pact of Negation
80%inclusion461 decks575 decks
72%synergy
Swords to Plowshares
79%inclusion455 decks575 decks
11%synergy
Fierce Guardianship
72%inclusion414 decks575 decks
51%synergy
Borne Upon a Wind
71%inclusion411 decks575 decks
67%synergy
Mystical Tutor
67%inclusion388 decks575 decks
56%synergy
An Offer You Can't Refuse
62%inclusion358 decks575 decks
35%synergy
Cyclonic Rift
58%inclusion335 decks575 decks
34%synergy
Cabal Ritual
56%inclusion324 decks575 decks
53%synergy
Into the Flood Maw
41%inclusion233 decks575 decks
37%synergy
Chain of Vapor
40%inclusion232 decks575 decks
37%synergy
Gifts Ungiven
34%inclusion198 decks575 decks
32%synergy
Mana Drain
33%inclusion192 decks575 decks
16%synergy
Sink into Stupor
31%inclusion176 decks575 decks
18%synergy
Ad Nauseam
21%inclusion121 decks575 decks
19%synergy
Retraction Helix
20%inclusion113 decks575 decks
19%synergy
Culling the Weak
18%inclusion102 decks575 decks
16%synergy
Path to Exile
18%inclusion101 decks575 decks
-25%synergy
Brain Freeze
14%inclusion81 decks575 decks
14%synergy
Darkblast
13%inclusion73 decks575 decks
13%synergy
Banishing Knack
12%inclusion70 decks575 decks
12%synergy
Dispel
11%inclusion65 decks575 decks
8%synergy
Saw in Half
10%inclusion59 decks575 decks
8%synergy
Strix Serenade
9.2%inclusion53 decks575 decks
6%synergy
Deadly Rollick
8.9%inclusion51 decks575 decks
-6%synergy
Sacrifice
7.5%inclusion43 decks575 decks
7%synergy
Muddle the Mixture
7.3%inclusion42 decks575 decks
3%synergy
Lim-Dûl's Vault
6.3%inclusion36 decks575 decks
3%synergy
Spell Pierce
6.3%inclusion36 decks575 decks
4%synergy
Orim's Chant
6.1%inclusion35 decks575 decks
5%synergy
Rain of Filth
5.4%inclusion31 decks575 decks
5%synergy
Dovin's Veto
5.2%inclusion30 decks575 decks
-20%synergy
Angel's Grace
5.2%inclusion30 decks575 decks
2%synergy
Counterspell
5.0%inclusion29 decks575 decks
-36%synergy
Dismember
5.0%inclusion29 decks575 decks
-1%synergy
Sorceries
Imperial Seal
78%inclusion446 decks575 decks
70%synergy
Sevinne's Reclamation
71%inclusion411 decks575 decks
63%synergy
Toxic Deluge
39%inclusion223 decks575 decks
19%synergy
Reanimate
36%inclusion209 decks575 decks
20%synergy
Windfall
29%inclusion167 decks575 decks
15%synergy
Beseech the Mirror
26%inclusion148 decks575 decks
22%synergy
Lively Dirge
25%inclusion146 decks575 decks
24%synergy
Mnemonic Betrayal
22%inclusion127 decks575 decks
19%synergy
Demonic Counsel
18%inclusion103 decks575 decks
17%synergy
Unmarked Grave
10%inclusion60 decks575 decks
9%synergy
Yawgmoth's Will
10%inclusion55 decks575 decks
8%synergy
Cabal Therapy
9.0%inclusion52 decks575 decks
9%synergy
Praetor's Grasp
8.9%inclusion51 decks575 decks
6%synergy
Diabolic Intent
8.2%inclusion47 decks575 decks
3%synergy
Utility Artifacts
Wishclaw Talisman
71%inclusion408 decks575 decks
63%synergy
Cursed Totem
11%inclusion65 decks575 decks
9%synergy
Mesmeric Orb
9.0%inclusion52 decks575 decks
8%synergy
Vexing Bauble
7.5%inclusion43 decks575 decks
6%synergy
Sensei's Divining Top
5.0%inclusion29 decks575 decks
-5%synergy
Enchantments
Tinybones Joins Up
68%inclusion390 decks575 decks
67%synergy
Necropotence
68%inclusion389 decks575 decks
61%synergy
Blind Obedience
63%inclusion364 decks575 decks
51%synergy
Amphibian Downpour
52%inclusion301 decks575 decks
48%synergy
Ripples of Undeath
51%inclusion295 decks575 decks
49%synergy
Touch the Spirit Realm
43%inclusion245 decks575 decks
40%synergy
Copy Artifact
42%inclusion243 decks575 decks
41%synergy
Mirrormade
37%inclusion215 decks575 decks
28%synergy
The Meathook Massacre
37%inclusion210 decks575 decks
33%synergy
Static Prison
36%inclusion208 decks575 decks
36%synergy
Steal Enchantment
29%inclusion164 decks575 decks
28%synergy
Counterbalance
19%inclusion110 decks575 decks
17%synergy
Trouble in Pairs
18%inclusion101 decks575 decks
12%synergy
Founding the Third Path
17%inclusion96 decks575 decks
17%synergy
Copy Enchantment
13%inclusion72 decks575 decks
8%synergy
Chains of Mephistopheles
12%inclusion67 decks575 decks
11%synergy
Chthonian Nightmare
11%inclusion66 decks575 decks
11%synergy
Monologue Tax
9.2%inclusion53 decks575 decks
3%synergy
Seal of Removal
8.3%inclusion48 decks575 decks
8%synergy
Leyline of Anticipation
7.5%inclusion43 decks575 decks
3%synergy
Seal of Cleansing
5.9%inclusion34 decks575 decks
4%synergy
Aura of Silence
5.7%inclusion33 decks575 decks
3%synergy
Second Chance
5.0%inclusion29 decks575 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
55%inclusion314 decks575 decks
46%synergy
Utility Lands
Otawara, Soaring City
87%inclusion501 decks575 decks
68%synergy
Urza's Saga
39%inclusion226 decks575 decks
27%synergy
Minamo, School at Water's Edge
32%inclusion186 decks575 decks
28%synergy
Emergence Zone
28%inclusion161 decks575 decks
26%synergy
Cephalid Coliseum
21%inclusion118 decks575 decks
17%synergy
City of Traitors
15%inclusion87 decks575 decks
14%synergy
Serra's Sanctum
12%inclusion69 decks575 decks
10%synergy
Takenuma, Abandoned Mire
11%inclusion63 decks575 decks
5%synergy
Urborg, Tomb of Yawgmoth
8.5%inclusion49 decks575 decks
-5%synergy
Hall of Heliod's Generosity
6.4%inclusion37 decks575 decks
-7%synergy
Mistrise Village
5.7%inclusion19 decks332 decks
2%synergy
Mana Artifacts
Sol Ring
99%inclusion572 decks575 decks
10%synergy
Arcane Signet
98%inclusion561 decks575 decks
10%synergy
Lotus Petal
94%inclusion538 decks575 decks
83%synergy
Talisman of Dominance
85%inclusion488 decks575 decks
35%synergy
Mox Diamond
83%inclusion477 decks575 decks
76%synergy
Fellwar Stone
82%inclusion471 decks575 decks
48%synergy
Mox Opal
79%inclusion455 decks575 decks
70%synergy
Lion's Eye Diamond
67%inclusion387 decks575 decks
65%synergy
Talisman of Progress
55%inclusion319 decks575 decks
12%synergy
Mox Amber
40%inclusion232 decks575 decks
34%synergy
Talisman of Hierarchy
39%inclusion226 decks575 decks
-4%synergy
Grim Monolith
36%inclusion206 decks575 decks
32%synergy
Basalt Monolith
6.8%inclusion39 decks575 decks
5%synergy
Lands
Command Tower
98%inclusion562 decks575 decks
5%synergy
Watery Grave
96%inclusion552 decks575 decks
46%synergy
Polluted Delta
96%inclusion552 decks575 decks
58%synergy
Hallowed Fountain
95%inclusion547 decks575 decks
46%synergy
Flooded Strand
94%inclusion542 decks575 decks
56%synergy
Godless Shrine
94%inclusion539 decks575 decks
43%synergy
Marsh Flats
93%inclusion537 decks575 decks
57%synergy
City of Brass
88%inclusion508 decks575 decks
73%synergy
Gemstone Caverns
88%inclusion504 decks575 decks
80%synergy
Mana Confluence
87%inclusion502 decks575 decks
73%synergy
Scrubland
86%inclusion492 decks575 decks
70%synergy
Tundra
86%inclusion492 decks575 decks
70%synergy
Underground Sea
83%inclusion478 decks575 decks
67%synergy
Misty Rainforest
82%inclusion472 decks575 decks
71%synergy
Bloodstained Mire
82%inclusion469 decks575 decks
71%synergy
Verdant Catacombs
79%inclusion452 decks575 decks
68%synergy
Scalding Tarn
75%inclusion431 decks575 decks
64%synergy
Windswept Heath
71%inclusion407 decks575 decks
61%synergy
Exotic Orchard
70%inclusion403 decks575 decks
11%synergy
Morphic Pool
68%inclusion390 decks575 decks
34%synergy
Arid Mesa
63%inclusion361 decks575 decks
53%synergy
Undercity Sewers
57%inclusion326 decks575 decks
42%synergy
Sea of Clouds
55%inclusion314 decks575 decks
19%synergy
Vault of Champions
47%inclusion270 decks575 decks
14%synergy
Island
44%inclusion254 decks575 decks
-49%synergy
Swamp
38%inclusion218 decks575 decks
-53%synergy
Sink into Stupor
31%inclusion176 decks575 decks
18%synergy
Plains
29%inclusion164 decks575 decks
-63%synergy
Starting Town
28%inclusion68 decks242 decks
24%synergy
Meticulous Archive
25%inclusion141 decks575 decks
11%synergy
Forbidden Orchard
20%inclusion117 decks575 decks
18%synergy
Spire of Industry
19%inclusion109 decks575 decks
11%synergy
Shadowy Backstreet
18%inclusion105 decks575 decks
6%synergy
Cavern of Souls
18%inclusion101 decks575 decks
11%synergy
Underground River
15%inclusion86 decks575 decks
-18%synergy
Talon Gates of Madara
12%inclusion69 decks575 decks
11%synergy
Caves of Koilos
10%inclusion59 decks575 decks
-25%synergy
Adarkar Wastes
10%inclusion58 decks575 decks
-21%synergy
Gloomlake Verge
8.3%inclusion48 decks575 decks
-3%synergy
Raffine's Tower
8.2%inclusion47 decks575 decks
-33%synergy
Floodfarm Verge
7.1%inclusion41 decks575 decks
-4%synergy
Reflecting Pool
5.6%inclusion32 decks575 decks
-2%synergy
Silent Clearing
5.2%inclusion30 decks575 decks
3%synergy
Snow-Covered Swamp
5.0%inclusion29 decks575 decks
2%synergy
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