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 Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Mornsong Aria
8.1%inclusion5 decks62 decks
7%synergy
Does Machines
3.5%inclusion2 decks57 decks
3%synergy
Voracious Tome-Skimmer
1.6%inclusion1 decks62 decks
1%synergy
High Synergy Cards
Necromancy
95%inclusion557 decks584 decks
91%synergy
Entomb
95%inclusion555 decks584 decks
88%synergy
Abdel Adrian, Gorion's Ward
90%inclusion525 decks584 decks
88%synergy
Animate Dead
98%inclusion570 decks584 decks
88%synergy
Dance of the Dead
89%inclusion521 decks584 decks
87%synergy
Dress Down
88%inclusion511 decks584 decks
85%synergy
Tainted Pact
90%inclusion527 decks584 decks
83%synergy
Silence
92%inclusion540 decks584 decks
82%synergy
Demonic Consultation
88%inclusion515 decks584 decks
80%synergy
Flusterstorm
87%inclusion509 decks584 decks
79%synergy
Top Cards
Mystic Remora
98%inclusion571 decks584 decks
77%synergy
Esper Sentinel
95%inclusion556 decks584 decks
68%synergy
Dark Ritual
94%inclusion549 decks584 decks
74%synergy
Swan Song
89%inclusion522 decks584 decks
70%synergy
Orcish Bowmasters
89%inclusion517 decks584 decks
78%synergy
Grand Abolisher
88%inclusion511 decks584 decks
73%synergy
Force of Negation
86%inclusion503 decks584 decks
74%synergy
Mindbreak Trap
85%inclusion497 decks584 decks
78%synergy
Intuition
80%inclusion469 decks584 decks
79%synergy
Pact of Negation
80%inclusion467 decks584 decks
72%synergy
Game Changers
Rhystic Study
97%inclusion568 decks584 decks
66%synergy
Demonic Tutor
97%inclusion565 decks584 decks
76%synergy
Vampiric Tutor
96%inclusion561 decks584 decks
79%synergy
Enlightened Tutor
95%inclusion556 decks584 decks
76%synergy
Thassa's Oracle
95%inclusion555 decks584 decks
86%synergy
Mana Vault
95%inclusion553 decks584 decks
86%synergy
Chrome Mox
93%inclusion543 decks584 decks
84%synergy
Force of Will
93%inclusion542 decks584 decks
80%synergy
Smothering Tithe
92%inclusion537 decks584 decks
61%synergy
Ancient Tomb
91%inclusion531 decks584 decks
78%synergy
Creatures
Ranger-Captain of Eos
79%inclusion461 decks584 decks
73%synergy
Lotho, Corrupt Shirriff
78%inclusion455 decks584 decks
61%synergy
Valley Floodcaller
73%inclusion429 decks584 decks
69%synergy
Opposition Agent
58%inclusion336 decks584 decks
49%synergy
Displacer Kitten
55%inclusion322 decks584 decks
48%synergy
Voice of Victory
52%inclusion179 decks346 decks
43%synergy
Wan Shi Tong, Librarian
51%inclusion55 decks108 decks
46%synergy
Hullbreaker Horror
46%inclusion270 decks584 decks
40%synergy
Archivist of Oghma
43%inclusion249 decks584 decks
36%synergy
Drannith Magistrate
42%inclusion246 decks584 decks
34%synergy
Mockingbird
42%inclusion243 decks584 decks
37%synergy
Auriok Salvagers
39%inclusion228 decks584 decks
39%synergy
Lurrus of the Dream-Den
37%inclusion215 decks584 decks
35%synergy
Ledger Shredder
32%inclusion186 decks584 decks
23%synergy
Tataru Taru
28%inclusion72 decks254 decks
20%synergy
Phyrexian Metamorph
26%inclusion152 decks584 decks
18%synergy
Talion, the Kindly Lord
26%inclusion152 decks584 decks
18%synergy
Faerie Mastermind
24%inclusion141 decks584 decks
15%synergy
Hedron Crab
22%inclusion128 decks584 decks
21%synergy
Pollywog Prodigy
20%inclusion117 decks584 decks
16%synergy
Psychic Frog
20%inclusion117 decks584 decks
13%synergy
Dauthi Voidwalker
14%inclusion81 decks584 decks
8%synergy
Ghostly Pilferer
13%inclusion75 decks584 decks
5%synergy
Hoarding Broodlord
11%inclusion67 decks584 decks
10%synergy
Leonin Relic-Warder
10%inclusion61 decks584 decks
10%synergy
Volatile Stormdrake
8.9%inclusion52 decks584 decks
8%synergy
High Fae Trickster
8.5%inclusion43 decks506 decks
4%synergy
Snapcaster Mage
7.5%inclusion44 decks584 decks
6%synergy
Gilded Drake
6.5%inclusion38 decks584 decks
5%synergy
Overlord of the Balemurk
5.3%inclusion31 decks584 decks
3%synergy
Entity Tracker
5.3%inclusion31 decks584 decks
-1%synergy
Emet-Selch of the Third Seat
5.1%inclusion13 decks254 decks
-4%synergy
Instants
Mental Misstep
80%inclusion466 decks584 decks
73%synergy
Swords to Plowshares
79%inclusion461 decks584 decks
11%synergy
Borne Upon a Wind
71%inclusion416 decks584 decks
66%synergy
Fierce Guardianship
71%inclusion416 decks584 decks
51%synergy
Mystical Tutor
68%inclusion395 decks584 decks
57%synergy
An Offer You Can't Refuse
63%inclusion366 decks584 decks
35%synergy
Cyclonic Rift
57%inclusion334 decks584 decks
34%synergy
Cabal Ritual
56%inclusion329 decks584 decks
53%synergy
Into the Flood Maw
41%inclusion239 decks584 decks
37%synergy
Chain of Vapor
40%inclusion233 decks584 decks
37%synergy
Gifts Ungiven
35%inclusion204 decks584 decks
32%synergy
Mana Drain
33%inclusion192 decks584 decks
16%synergy
Sink into Stupor
31%inclusion181 decks584 decks
18%synergy
Ad Nauseam
21%inclusion120 decks584 decks
18%synergy
Retraction Helix
20%inclusion116 decks584 decks
19%synergy
Culling the Weak
18%inclusion106 decks584 decks
17%synergy
Path to Exile
17%inclusion102 decks584 decks
-25%synergy
Brain Freeze
14%inclusion82 decks584 decks
13%synergy
Darkblast
13%inclusion74 decks584 decks
13%synergy
Banishing Knack
12%inclusion70 decks584 decks
12%synergy
Dispel
11%inclusion66 decks584 decks
8%synergy
Saw in Half
10%inclusion58 decks584 decks
8%synergy
Deadly Rollick
9.1%inclusion53 decks584 decks
-6%synergy
Strix Serenade
8.9%inclusion52 decks584 decks
5%synergy
Sacrifice
7.5%inclusion44 decks584 decks
7%synergy
Muddle the Mixture
7.0%inclusion41 decks584 decks
3%synergy
Orim's Chant
7.0%inclusion41 decks584 decks
6%synergy
Lim-Dûl's Vault
6.7%inclusion39 decks584 decks
3%synergy
Spell Pierce
6.2%inclusion36 decks584 decks
4%synergy
Rain of Filth
5.7%inclusion33 decks584 decks
5%synergy
Counterspell
5.7%inclusion33 decks584 decks
-36%synergy
Dovin's Veto
5.5%inclusion32 decks584 decks
-20%synergy
Angel's Grace
5.1%inclusion30 decks584 decks
2%synergy
Sorceries
Imperial Seal
77%inclusion449 decks584 decks
70%synergy
Sevinne's Reclamation
72%inclusion419 decks584 decks
63%synergy
Toxic Deluge
38%inclusion219 decks584 decks
18%synergy
Reanimate
37%inclusion215 decks584 decks
21%synergy
Windfall
29%inclusion171 decks584 decks
16%synergy
Beseech the Mirror
26%inclusion151 decks584 decks
22%synergy
Lively Dirge
25%inclusion144 decks584 decks
23%synergy
Mnemonic Betrayal
22%inclusion126 decks584 decks
19%synergy
Demonic Counsel
18%inclusion108 decks584 decks
17%synergy
Unmarked Grave
10%inclusion59 decks584 decks
9%synergy
Cabal Therapy
9.4%inclusion55 decks584 decks
9%synergy
Praetor's Grasp
9.4%inclusion55 decks584 decks
7%synergy
Yawgmoth's Will
9.1%inclusion53 decks584 decks
8%synergy
Diabolic Intent
8.4%inclusion49 decks584 decks
3%synergy
Utility Artifacts
The One Ring
79%inclusion462 decks584 decks
66%synergy
Wishclaw Talisman
71%inclusion412 decks584 decks
63%synergy
Cursed Totem
11%inclusion64 decks584 decks
9%synergy
Mesmeric Orb
9.2%inclusion54 decks584 decks
8%synergy
Vexing Bauble
7.5%inclusion44 decks584 decks
6%synergy
Enchantments
Necropotence
68%inclusion400 decks584 decks
62%synergy
Tinybones Joins Up
67%inclusion392 decks584 decks
66%synergy
Blind Obedience
62%inclusion360 decks584 decks
50%synergy
Amphibian Downpour
53%inclusion308 decks584 decks
48%synergy
Ripples of Undeath
51%inclusion298 decks584 decks
48%synergy
Touch the Spirit Realm
42%inclusion247 decks584 decks
40%synergy
Copy Artifact
41%inclusion240 decks584 decks
40%synergy
Mirrormade
38%inclusion224 decks584 decks
29%synergy
The Meathook Massacre
36%inclusion209 decks584 decks
32%synergy
Static Prison
35%inclusion206 decks584 decks
35%synergy
Steal Enchantment
28%inclusion163 decks584 decks
27%synergy
Counterbalance
19%inclusion110 decks584 decks
17%synergy
Trouble in Pairs
17%inclusion100 decks584 decks
12%synergy
Founding the Third Path
17%inclusion98 decks584 decks
17%synergy
Copy Enchantment
15%inclusion85 decks584 decks
10%synergy
Chains of Mephistopheles
11%inclusion66 decks584 decks
11%synergy
Chthonian Nightmare
11%inclusion65 decks584 decks
11%synergy
Monologue Tax
9.4%inclusion55 decks584 decks
3%synergy
Leyline of Anticipation
8.4%inclusion49 decks584 decks
4%synergy
Seal of Removal
8.4%inclusion49 decks584 decks
8%synergy
Seal of Cleansing
6.5%inclusion38 decks584 decks
5%synergy
Aura of Silence
5.7%inclusion33 decks584 decks
2%synergy
Planeswalkers
Teferi, Time Raveler
53%inclusion310 decks584 decks
45%synergy
Utility Lands
Otawara, Soaring City
86%inclusion504 decks584 decks
67%synergy
Urza's Saga
39%inclusion228 decks584 decks
27%synergy
Minamo, School at Water's Edge
32%inclusion187 decks584 decks
28%synergy
Emergence Zone
28%inclusion164 decks584 decks
26%synergy
Cephalid Coliseum
21%inclusion122 decks584 decks
17%synergy
City of Traitors
16%inclusion91 decks584 decks
14%synergy
Serra's Sanctum
12%inclusion70 decks584 decks
10%synergy
Takenuma, Abandoned Mire
11%inclusion63 decks584 decks
4%synergy
Urborg, Tomb of Yawgmoth
8.7%inclusion51 decks584 decks
-4%synergy
Hall of Heliod's Generosity
7.0%inclusion41 decks584 decks
-6%synergy
Mistrise Village
5.2%inclusion18 decks343 decks
2%synergy
Mana Artifacts
Sol Ring
99%inclusion581 decks584 decks
10%synergy
Arcane Signet
98%inclusion570 decks584 decks
10%synergy
Lotus Petal
93%inclusion545 decks584 decks
83%synergy
Talisman of Dominance
85%inclusion494 decks584 decks
35%synergy
Mox Diamond
82%inclusion481 decks584 decks
75%synergy
Fellwar Stone
82%inclusion476 decks584 decks
48%synergy
Mox Opal
79%inclusion459 decks584 decks
70%synergy
Lion's Eye Diamond
67%inclusion391 decks584 decks
65%synergy
Talisman of Progress
56%inclusion326 decks584 decks
12%synergy
Mox Amber
40%inclusion232 decks584 decks
34%synergy
Talisman of Hierarchy
40%inclusion232 decks584 decks
-4%synergy
Grim Monolith
36%inclusion208 decks584 decks
32%synergy
Basalt Monolith
6.8%inclusion40 decks584 decks
5%synergy
Lands
Command Tower
98%inclusion572 decks584 decks
5%synergy
Polluted Delta
96%inclusion560 decks584 decks
58%synergy
Watery Grave
96%inclusion560 decks584 decks
45%synergy
Hallowed Fountain
95%inclusion553 decks584 decks
45%synergy
Flooded Strand
94%inclusion549 decks584 decks
56%synergy
Godless Shrine
94%inclusion548 decks584 decks
43%synergy
Marsh Flats
93%inclusion545 decks584 decks
57%synergy
City of Brass
88%inclusion512 decks584 decks
73%synergy
Gemstone Caverns
87%inclusion510 decks584 decks
80%synergy
Mana Confluence
87%inclusion508 decks584 decks
73%synergy
Tundra
85%inclusion497 decks584 decks
69%synergy
Scrubland
85%inclusion496 decks584 decks
69%synergy
Underground Sea
83%inclusion483 decks584 decks
67%synergy
Misty Rainforest
81%inclusion474 decks584 decks
70%synergy
Bloodstained Mire
81%inclusion474 decks584 decks
70%synergy
Verdant Catacombs
78%inclusion456 decks584 decks
68%synergy
Scalding Tarn
74%inclusion434 decks584 decks
63%synergy
Windswept Heath
70%inclusion407 decks584 decks
60%synergy
Exotic Orchard
70%inclusion407 decks584 decks
11%synergy
Morphic Pool
68%inclusion398 decks584 decks
34%synergy
Arid Mesa
62%inclusion362 decks584 decks
52%synergy
Undercity Sewers
56%inclusion328 decks584 decks
42%synergy
Sea of Clouds
54%inclusion317 decks584 decks
19%synergy
Vault of Champions
47%inclusion273 decks584 decks
14%synergy
Island
44%inclusion256 decks584 decks
-49%synergy
Swamp
38%inclusion219 decks584 decks
-54%synergy
Sink into Stupor
31%inclusion181 decks584 decks
18%synergy
Starting Town
31%inclusion78 decks254 decks
27%synergy
Plains
29%inclusion167 decks584 decks
-63%synergy
Meticulous Archive
25%inclusion146 decks584 decks
11%synergy
Forbidden Orchard
21%inclusion121 decks584 decks
18%synergy
Spire of Industry
19%inclusion111 decks584 decks
11%synergy
Cavern of Souls
18%inclusion106 decks584 decks
11%synergy
Shadowy Backstreet
18%inclusion105 decks584 decks
5%synergy
Underground River
15%inclusion90 decks584 decks
-18%synergy
Talon Gates of Madara
12%inclusion68 decks584 decks
10%synergy
Caves of Koilos
11%inclusion62 decks584 decks
-25%synergy
Adarkar Wastes
11%inclusion62 decks584 decks
-21%synergy
Raffine's Tower
8.7%inclusion51 decks584 decks
-32%synergy
Gloomlake Verge
8.4%inclusion49 decks584 decks
-3%synergy
Floodfarm Verge
7.2%inclusion42 decks584 decks
-4%synergy
Reflecting Pool
5.7%inclusion33 decks584 decks
-2%synergy
Silent Clearing
5.5%inclusion32 decks584 decks
3%synergy
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