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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Utility Lands
Mana Artifacts
Lands
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Wan Shi Tong, Librarian
49%inclusion31 decks63 decks
44%synergy
Chakra Meditation
1.7%inclusion1 decks60 decks
2%synergy
Avatar's Wrath
1.6%inclusion1 decks62 decks
-1%synergy
The Spirit Oasis
1.6%inclusion1 decks62 decks
2%synergy
Northern Air Temple
1.6%inclusion1 decks63 decks
2%synergy
High Synergy Cards
Necromancy
95%inclusion534 decks561 decks
91%synergy
Abdel Adrian, Gorion's Ward
90%inclusion507 decks561 decks
89%synergy
Entomb
95%inclusion534 decks561 decks
88%synergy
Animate Dead
98%inclusion548 decks561 decks
88%synergy
Dance of the Dead
89%inclusion498 decks561 decks
87%synergy
Dress Down
87%inclusion488 decks561 decks
84%synergy
Tainted Pact
91%inclusion511 decks561 decks
84%synergy
Silence
93%inclusion519 decks561 decks
82%synergy
Demonic Consultation
88%inclusion496 decks561 decks
80%synergy
Flusterstorm
88%inclusion493 decks561 decks
80%synergy
Top Cards
Mystic Remora
98%inclusion549 decks561 decks
76%synergy
Esper Sentinel
95%inclusion535 decks561 decks
68%synergy
Dark Ritual
94%inclusion529 decks561 decks
75%synergy
Swan Song
90%inclusion505 decks561 decks
71%synergy
Orcish Bowmasters
89%inclusion502 decks561 decks
78%synergy
Grand Abolisher
88%inclusion493 decks561 decks
73%synergy
Force of Negation
86%inclusion482 decks561 decks
74%synergy
Mindbreak Trap
85%inclusion479 decks561 decks
79%synergy
The One Ring
82%inclusion460 decks561 decks
68%synergy
Intuition
81%inclusion452 decks561 decks
79%synergy
Game Changers
Rhystic Study
97%inclusion545 decks561 decks
65%synergy
Demonic Tutor
97%inclusion543 decks561 decks
75%synergy
Vampiric Tutor
96%inclusion540 decks561 decks
78%synergy
Thassa's Oracle
95%inclusion535 decks561 decks
86%synergy
Enlightened Tutor
95%inclusion534 decks561 decks
75%synergy
Mana Vault
95%inclusion532 decks561 decks
85%synergy
Chrome Mox
93%inclusion524 decks561 decks
84%synergy
Force of Will
93%inclusion522 decks561 decks
80%synergy
Smothering Tithe
92%inclusion516 decks561 decks
60%synergy
Ancient Tomb
91%inclusion512 decks561 decks
78%synergy
Creatures
Ranger-Captain of Eos
80%inclusion450 decks561 decks
74%synergy
Lotho, Corrupt Shirriff
78%inclusion439 decks561 decks
61%synergy
Valley Floodcaller
74%inclusion417 decks561 decks
70%synergy
Opposition Agent
59%inclusion332 decks561 decks
50%synergy
Displacer Kitten
57%inclusion321 decks561 decks
50%synergy
Voice of Victory
51%inclusion162 decks318 decks
43%synergy
Hullbreaker Horror
48%inclusion269 decks561 decks
42%synergy
Archivist of Oghma
44%inclusion245 decks561 decks
37%synergy
Drannith Magistrate
43%inclusion241 decks561 decks
35%synergy
Mockingbird
41%inclusion232 decks561 decks
37%synergy
Auriok Salvagers
39%inclusion217 decks561 decks
38%synergy
Lurrus of the Dream-Den
39%inclusion216 decks561 decks
37%synergy
Ledger Shredder
33%inclusion186 decks561 decks
24%synergy
Talion, the Kindly Lord
27%inclusion154 decks561 decks
19%synergy
Phyrexian Metamorph
27%inclusion150 decks561 decks
18%synergy
Tataru Taru
24%inclusion53 decks223 decks
15%synergy
Hedron Crab
22%inclusion125 decks561 decks
22%synergy
Faerie Mastermind
22%inclusion124 decks561 decks
13%synergy
Psychic Frog
21%inclusion118 decks561 decks
14%synergy
Pollywog Prodigy
21%inclusion118 decks561 decks
17%synergy
Dauthi Voidwalker
14%inclusion77 decks561 decks
8%synergy
Hoarding Broodlord
12%inclusion69 decks561 decks
10%synergy
Ghostly Pilferer
12%inclusion69 decks561 decks
5%synergy
Leonin Relic-Warder
11%inclusion60 decks561 decks
10%synergy
Volatile Stormdrake
9.1%inclusion51 decks561 decks
8%synergy
High Fae Trickster
8.7%inclusion42 decks482 decks
4%synergy
Snapcaster Mage
8.4%inclusion47 decks561 decks
6%synergy
Gilded Drake
6.2%inclusion35 decks561 decks
4%synergy
Emet-Selch of the Third Seat
5.8%inclusion13 decks223 decks
-4%synergy
Phantasmal Image
5.5%inclusion31 decks561 decks
3%synergy
Spellseeker
5.2%inclusion29 decks561 decks
4%synergy
Instants
Mental Misstep
80%inclusion448 decks561 decks
73%synergy
Pact of Negation
80%inclusion447 decks561 decks
72%synergy
Swords to Plowshares
78%inclusion440 decks561 decks
10%synergy
Fierce Guardianship
73%inclusion410 decks561 decks
52%synergy
Borne Upon a Wind
71%inclusion399 decks561 decks
66%synergy
Mystical Tutor
68%inclusion380 decks561 decks
56%synergy
An Offer You Can't Refuse
63%inclusion353 decks561 decks
36%synergy
Cyclonic Rift
59%inclusion331 decks561 decks
34%synergy
Cabal Ritual
56%inclusion312 decks561 decks
52%synergy
Into the Flood Maw
40%inclusion226 decks561 decks
37%synergy
Chain of Vapor
40%inclusion224 decks561 decks
36%synergy
Mana Drain
34%inclusion191 decks561 decks
17%synergy
Gifts Ungiven
34%inclusion190 decks561 decks
32%synergy
Sink into Stupor
31%inclusion173 decks561 decks
18%synergy
Ad Nauseam
20%inclusion115 decks561 decks
18%synergy
Retraction Helix
20%inclusion110 decks561 decks
19%synergy
Culling the Weak
17%inclusion97 decks561 decks
16%synergy
Path to Exile
17%inclusion97 decks561 decks
-25%synergy
Brain Freeze
14%inclusion76 decks561 decks
13%synergy
Darkblast
13%inclusion72 decks561 decks
13%synergy
Banishing Knack
12%inclusion70 decks561 decks
12%synergy
Dispel
11%inclusion64 decks561 decks
8%synergy
Saw in Half
11%inclusion59 decks561 decks
8%synergy
Strix Serenade
9.4%inclusion53 decks561 decks
6%synergy
Deadly Rollick
8.7%inclusion49 decks561 decks
-5%synergy
Sacrifice
7.7%inclusion43 decks561 decks
7%synergy
Muddle the Mixture
7.5%inclusion42 decks561 decks
3%synergy
Spell Pierce
6.6%inclusion37 decks561 decks
4%synergy
Lim-Dûl's Vault
5.9%inclusion33 decks561 decks
2%synergy
Orim's Chant
5.7%inclusion32 decks561 decks
4%synergy
Angel's Grace
5.3%inclusion30 decks561 decks
3%synergy
Counterspell
5.2%inclusion29 decks561 decks
-36%synergy
Dovin's Veto
5.2%inclusion29 decks561 decks
-20%synergy
Sorceries
Imperial Seal
78%inclusion435 decks561 decks
70%synergy
Sevinne's Reclamation
71%inclusion396 decks561 decks
62%synergy
Toxic Deluge
39%inclusion221 decks561 decks
20%synergy
Reanimate
36%inclusion203 decks561 decks
20%synergy
Windfall
29%inclusion164 decks561 decks
15%synergy
Lively Dirge
25%inclusion143 decks561 decks
24%synergy
Beseech the Mirror
25%inclusion142 decks561 decks
21%synergy
Mnemonic Betrayal
21%inclusion120 decks561 decks
18%synergy
Demonic Counsel
18%inclusion103 decks561 decks
17%synergy
Unmarked Grave
11%inclusion59 decks561 decks
9%synergy
Yawgmoth's Will
10%inclusion55 decks561 decks
8%synergy
Cabal Therapy
8.9%inclusion50 decks561 decks
9%synergy
Praetor's Grasp
8.6%inclusion48 decks561 decks
6%synergy
Diabolic Intent
8.4%inclusion47 decks561 decks
3%synergy
Utility Artifacts
Wishclaw Talisman
70%inclusion395 decks561 decks
62%synergy
Cursed Totem
11%inclusion63 decks561 decks
9%synergy
Mesmeric Orb
8.7%inclusion49 decks561 decks
8%synergy
Vexing Bauble
7.3%inclusion41 decks561 decks
5%synergy
Enchantments
Tinybones Joins Up
67%inclusion377 decks561 decks
66%synergy
Necropotence
67%inclusion376 decks561 decks
60%synergy
Blind Obedience
63%inclusion355 decks561 decks
51%synergy
Ripples of Undeath
52%inclusion289 decks561 decks
49%synergy
Amphibian Downpour
52%inclusion289 decks561 decks
47%synergy
Touch the Spirit Realm
42%inclusion238 decks561 decks
40%synergy
Copy Artifact
42%inclusion235 decks561 decks
41%synergy
Mirrormade
37%inclusion208 decks561 decks
27%synergy
Static Prison
36%inclusion204 decks561 decks
36%synergy
The Meathook Massacre
36%inclusion200 decks561 decks
32%synergy
Steal Enchantment
29%inclusion164 decks561 decks
28%synergy
Counterbalance
19%inclusion104 decks561 decks
17%synergy
Trouble in Pairs
18%inclusion99 decks561 decks
12%synergy
Founding the Third Path
16%inclusion90 decks561 decks
16%synergy
Copy Enchantment
12%inclusion69 decks561 decks
8%synergy
Chthonian Nightmare
12%inclusion66 decks561 decks
11%synergy
Chains of Mephistopheles
12%inclusion65 decks561 decks
11%synergy
Monologue Tax
9.1%inclusion51 decks561 decks
3%synergy
Seal of Removal
8.0%inclusion45 decks561 decks
7%synergy
Leyline of Anticipation
7.1%inclusion40 decks561 decks
3%synergy
Seal of Cleansing
5.9%inclusion33 decks561 decks
4%synergy
Aura of Silence
5.5%inclusion31 decks561 decks
2%synergy
Second Chance
5.2%inclusion29 decks561 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
55%inclusion311 decks561 decks
47%synergy
Utility Lands
Otawara, Soaring City
88%inclusion491 decks561 decks
68%synergy
Urza's Saga
40%inclusion223 decks561 decks
28%synergy
Minamo, School at Water's Edge
33%inclusion183 decks561 decks
29%synergy
Emergence Zone
29%inclusion160 decks561 decks
26%synergy
Cephalid Coliseum
20%inclusion114 decks561 decks
17%synergy
City of Traitors
15%inclusion82 decks561 decks
13%synergy
Serra's Sanctum
12%inclusion67 decks561 decks
10%synergy
Takenuma, Abandoned Mire
11%inclusion63 decks561 decks
5%synergy
Urborg, Tomb of Yawgmoth
8.7%inclusion49 decks561 decks
-4%synergy
Hall of Heliod's Generosity
6.6%inclusion37 decks561 decks
-7%synergy
Mistrise Village
6.0%inclusion19 decks315 decks
2%synergy
Mana Artifacts
Sol Ring
100%inclusion559 decks561 decks
10%synergy
Arcane Signet
98%inclusion548 decks561 decks
10%synergy
Lotus Petal
93%inclusion524 decks561 decks
83%synergy
Talisman of Dominance
85%inclusion479 decks561 decks
36%synergy
Mox Diamond
83%inclusion463 decks561 decks
75%synergy
Fellwar Stone
82%inclusion459 decks561 decks
48%synergy
Mox Opal
80%inclusion446 decks561 decks
71%synergy
Lion's Eye Diamond
67%inclusion376 decks561 decks
65%synergy
Talisman of Progress
56%inclusion315 decks561 decks
13%synergy
Mox Amber
41%inclusion229 decks561 decks
35%synergy
Talisman of Hierarchy
40%inclusion223 decks561 decks
-3%synergy
Grim Monolith
36%inclusion203 decks561 decks
33%synergy
Basalt Monolith
7.0%inclusion39 decks561 decks
5%synergy
Lands
Command Tower
98%inclusion549 decks561 decks
5%synergy
Watery Grave
96%inclusion539 decks561 decks
46%synergy
Polluted Delta
96%inclusion539 decks561 decks
59%synergy
Hallowed Fountain
95%inclusion534 decks561 decks
46%synergy
Flooded Strand
94%inclusion529 decks561 decks
57%synergy
Godless Shrine
94%inclusion526 decks561 decks
44%synergy
Marsh Flats
93%inclusion524 decks561 decks
57%synergy
City of Brass
88%inclusion495 decks561 decks
73%synergy
Gemstone Caverns
88%inclusion491 decks561 decks
80%synergy
Mana Confluence
87%inclusion489 decks561 decks
73%synergy
Tundra
86%inclusion480 decks561 decks
70%synergy
Scrubland
85%inclusion479 decks561 decks
69%synergy
Underground Sea
83%inclusion465 decks561 decks
67%synergy
Misty Rainforest
82%inclusion459 decks561 decks
71%synergy
Bloodstained Mire
81%inclusion456 decks561 decks
70%synergy
Verdant Catacombs
79%inclusion441 decks561 decks
68%synergy
Scalding Tarn
75%inclusion419 decks561 decks
63%synergy
Windswept Heath
71%inclusion397 decks561 decks
61%synergy
Exotic Orchard
70%inclusion394 decks561 decks
12%synergy
Morphic Pool
68%inclusion380 decks561 decks
33%synergy
Arid Mesa
63%inclusion352 decks561 decks
53%synergy
Undercity Sewers
57%inclusion317 decks561 decks
42%synergy
Sea of Clouds
55%inclusion308 decks561 decks
19%synergy
Vault of Champions
47%inclusion266 decks561 decks
15%synergy
Island
45%inclusion250 decks561 decks
-48%synergy
Swamp
38%inclusion215 decks561 decks
-53%synergy
Sink into Stupor
31%inclusion173 decks561 decks
18%synergy
Plains
29%inclusion161 decks561 decks
-63%synergy
Starting Town
27%inclusion61 decks223 decks
23%synergy
Meticulous Archive
25%inclusion141 decks561 decks
12%synergy
Forbidden Orchard
21%inclusion117 decks561 decks
18%synergy
Spire of Industry
19%inclusion107 decks561 decks
10%synergy
Shadowy Backstreet
18%inclusion103 decks561 decks
6%synergy
Cavern of Souls
18%inclusion99 decks561 decks
11%synergy
Underground River
15%inclusion85 decks561 decks
-17%synergy
Talon Gates of Madara
12%inclusion69 decks561 decks
11%synergy
Caves of Koilos
11%inclusion59 decks561 decks
-25%synergy
Adarkar Wastes
10%inclusion58 decks561 decks
-20%synergy
Gloomlake Verge
8.7%inclusion49 decks561 decks
-2%synergy
Raffine's Tower
8.4%inclusion47 decks561 decks
-33%synergy
Floodfarm Verge
7.0%inclusion39 decks561 decks
-4%synergy
Reflecting Pool
5.5%inclusion31 decks561 decks
-3%synergy
Silent Clearing
5.3%inclusion30 decks561 decks
3%synergy
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