The Master of Keys (Commander) - Expensive Combo

The Master of Keys
Rank #305
21decks
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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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Does Machines
50%inclusion1 decks2 decks
50%synergy
High Synergy Cards
Dress Down
95%inclusion20 decks21 decks
93%synergy
Necromancy
95%inclusion20 decks21 decks
91%synergy
Mental Misstep
95%inclusion20 decks21 decks
89%synergy
Mindbreak Trap
95%inclusion20 decks21 decks
88%synergy
Entomb
95%inclusion20 decks21 decks
88%synergy
Tainted Pact
95%inclusion20 decks21 decks
88%synergy
Flusterstorm
95%inclusion20 decks21 decks
87%synergy
Silence
95%inclusion20 decks21 decks
85%synergy
Abdel Adrian, Gorion's Ward
86%inclusion18 decks21 decks
84%synergy
Demonic Consultation
90%inclusion19 decks21 decks
82%synergy
Top Cards
Dark Ritual
95%inclusion20 decks21 decks
76%synergy
Esper Sentinel
95%inclusion20 decks21 decks
68%synergy
Mystic Remora
95%inclusion20 decks21 decks
74%synergy
Rhystic Study
90%inclusion19 decks21 decks
59%synergy
Force of Negation
90%inclusion19 decks21 decks
79%synergy
Animate Dead
90%inclusion19 decks21 decks
81%synergy
Orcish Bowmasters
90%inclusion19 decks21 decks
80%synergy
Lotho, Corrupt Shirriff
86%inclusion18 decks21 decks
69%synergy
Imperial Seal
86%inclusion18 decks21 decks
78%synergy
Swan Song
86%inclusion18 decks21 decks
66%synergy
Game Changers
Ancient Tomb
100%inclusion21 decks21 decks
87%synergy
Intuition
100%inclusion21 decks21 decks
98%synergy
Demonic Tutor
100%inclusion21 decks21 decks
79%synergy
Force of Will
100%inclusion21 decks21 decks
88%synergy
Smothering Tithe
95%inclusion20 decks21 decks
64%synergy
Thassa's Oracle
95%inclusion20 decks21 decks
86%synergy
Mana Vault
95%inclusion20 decks21 decks
86%synergy
Enlightened Tutor
95%inclusion20 decks21 decks
76%synergy
Chrome Mox
95%inclusion20 decks21 decks
86%synergy
Vampiric Tutor
95%inclusion20 decks21 decks
78%synergy
Creatures
Wan Shi Tong, Librarian
100%inclusion3 decks3 decks
95%synergy
Ranger-Captain of Eos
86%inclusion18 decks21 decks
79%synergy
Valley Floodcaller
81%inclusion17 decks21 decks
77%synergy
Grand Abolisher
81%inclusion17 decks21 decks
66%synergy
Archivist of Oghma
57%inclusion12 decks21 decks
51%synergy
Mockingbird
57%inclusion12 decks21 decks
53%synergy
Hullbreaker Horror
52%inclusion11 decks21 decks
46%synergy
Voice of Victory
50%inclusion5 decks10 decks
42%synergy
Opposition Agent
48%inclusion10 decks21 decks
39%synergy
Tataru Taru
44%inclusion4 decks9 decks
36%synergy
Displacer Kitten
43%inclusion9 decks21 decks
36%synergy
Phyrexian Metamorph
43%inclusion9 decks21 decks
34%synergy
Lurrus of the Dream-Den
43%inclusion9 decks21 decks
41%synergy
Auriok Salvagers
43%inclusion9 decks21 decks
43%synergy
Hedron Crab
33%inclusion7 decks21 decks
33%synergy
Faerie Mastermind
33%inclusion7 decks21 decks
24%synergy
Ghostly Pilferer
33%inclusion7 decks21 decks
26%synergy
Ledger Shredder
29%inclusion6 decks21 decks
20%synergy
Drannith Magistrate
24%inclusion5 decks21 decks
16%synergy
Snapcaster Mage
14%inclusion3 decks21 decks
12%synergy
Leonin Relic-Warder
14%inclusion3 decks21 decks
14%synergy
Pollywog Prodigy
14%inclusion3 decks21 decks
10%synergy
High Fae Trickster
13%inclusion2 decks16 decks
8%synergy
Emet-Selch of the Third Seat
11%inclusion1 decks9 decks
2%synergy
Volatile Stormdrake
10%inclusion2 decks21 decks
8%synergy
Overlord of the Balemurk
10%inclusion2 decks21 decks
8%synergy
Talion, the Kindly Lord
10%inclusion2 decks21 decks
2%synergy
Psychic Frog
10%inclusion2 decks21 decks
3%synergy
Academy Rector
10%inclusion2 decks21 decks
9%synergy
Neerdiv, Devious Diver
6.3%inclusion1 decks16 decks
6%synergy
Instants
Pact of Negation
86%inclusion18 decks21 decks
78%synergy
Borne Upon a Wind
71%inclusion15 decks21 decks
67%synergy
Cabal Ritual
67%inclusion14 decks21 decks
63%synergy
Swords to Plowshares
62%inclusion13 decks21 decks
-6%synergy
Fierce Guardianship
57%inclusion12 decks21 decks
37%synergy
Mystical Tutor
57%inclusion12 decks21 decks
46%synergy
Chain of Vapor
43%inclusion9 decks21 decks
40%synergy
Cyclonic Rift
43%inclusion9 decks21 decks
19%synergy
An Offer You Can't Refuse
38%inclusion8 decks21 decks
11%synergy
Gifts Ungiven
38%inclusion8 decks21 decks
36%synergy
Darkblast
33%inclusion7 decks21 decks
33%synergy
Brain Freeze
29%inclusion6 decks21 decks
28%synergy
Into the Flood Maw
29%inclusion6 decks21 decks
25%synergy
Retraction Helix
24%inclusion5 decks21 decks
23%synergy
Banishing Knack
24%inclusion5 decks21 decks
23%synergy
Mana Drain
24%inclusion5 decks21 decks
6%synergy
Sink into Stupor
19%inclusion4 decks21 decks
6%synergy
Orim's Chant
14%inclusion3 decks21 decks
13%synergy
Culling the Weak
14%inclusion3 decks21 decks
13%synergy
Dispel
14%inclusion3 decks21 decks
11%synergy
Sacrifice
10%inclusion2 decks21 decks
9%synergy
Lim-Dûl's Vault
10%inclusion2 decks21 decks
6%synergy
Strix Serenade
10%inclusion2 decks21 decks
6%synergy
Ad Nauseam
10%inclusion2 decks21 decks
7%synergy
Commandeer
10%inclusion2 decks21 decks
8%synergy
Path to Exile
10%inclusion2 decks21 decks
-33%synergy
Sorceries
Sevinne's Reclamation
67%inclusion14 decks21 decks
58%synergy
Reanimate
48%inclusion10 decks21 decks
31%synergy
Lively Dirge
43%inclusion9 decks21 decks
42%synergy
Demonic Counsel
33%inclusion7 decks21 decks
32%synergy
Flash Photography
25%inclusion1 decks4 decks
24%synergy
Mnemonic Betrayal
24%inclusion5 decks21 decks
21%synergy
Beseech the Mirror
24%inclusion5 decks21 decks
20%synergy
Windfall
19%inclusion4 decks21 decks
6%synergy
Yawgmoth's Will
19%inclusion4 decks21 decks
18%synergy
Unmarked Grave
14%inclusion3 decks21 decks
13%synergy
Toxic Deluge
14%inclusion3 decks21 decks
-5%synergy
Timetwister
14%inclusion3 decks21 decks
13%synergy
Cabal Therapy
10%inclusion2 decks21 decks
9%synergy
Diabolic Intent
10%inclusion2 decks21 decks
5%synergy
Praetor's Grasp
10%inclusion2 decks21 decks
7%synergy
Utility Artifacts
Wishclaw Talisman
71%inclusion15 decks21 decks
63%synergy
The One Ring
67%inclusion14 decks21 decks
53%synergy
Vexing Bauble
19%inclusion4 decks21 decks
17%synergy
Agatha's Soul Cauldron
14%inclusion3 decks21 decks
14%synergy
Enchantments
Dance of the Dead
81%inclusion17 decks21 decks
79%synergy
Tinybones Joins Up
76%inclusion16 decks21 decks
75%synergy
Amphibian Downpour
67%inclusion14 decks21 decks
62%synergy
Blind Obedience
62%inclusion13 decks21 decks
50%synergy
Copy Artifact
62%inclusion13 decks21 decks
61%synergy
Chains of Mephistopheles
57%inclusion12 decks21 decks
57%synergy
Necropotence
52%inclusion11 decks21 decks
46%synergy
Counterbalance
48%inclusion10 decks21 decks
46%synergy
The Meathook Massacre
48%inclusion10 decks21 decks
44%synergy
Steal Enchantment
48%inclusion10 decks21 decks
47%synergy
Mirrormade
48%inclusion10 decks21 decks
38%synergy
Touch the Spirit Realm
33%inclusion7 decks21 decks
31%synergy
Founding the Third Path
29%inclusion6 decks21 decks
28%synergy
Ripples of Undeath
29%inclusion6 decks21 decks
26%synergy
Static Prison
29%inclusion6 decks21 decks
28%synergy
Teval's Judgment
20%inclusion2 decks10 decks
19%synergy
Monologue Tax
19%inclusion4 decks21 decks
13%synergy
Copy Enchantment
14%inclusion3 decks21 decks
10%synergy
Seal of Cleansing
14%inclusion3 decks21 decks
13%synergy
Trouble in Pairs
14%inclusion3 decks21 decks
9%synergy
Attunement
10%inclusion2 decks21 decks
9%synergy
Leyline of Anticipation
10%inclusion2 decks21 decks
5%synergy
Seal of Removal
10%inclusion2 decks21 decks
9%synergy
Planeswalkers
Teferi, Time Raveler
38%inclusion8 decks21 decks
30%synergy
Tezzeret, Cruel Captain
13%inclusion1 decks8 decks
11%synergy
Utility Lands
Otawara, Soaring City
90%inclusion19 decks21 decks
71%synergy
City of Traitors
38%inclusion8 decks21 decks
37%synergy
Emergence Zone
29%inclusion6 decks21 decks
27%synergy
Cephalid Coliseum
29%inclusion6 decks21 decks
25%synergy
Minamo, School at Water's Edge
24%inclusion5 decks21 decks
20%synergy
Serra's Sanctum
24%inclusion5 decks21 decks
22%synergy
Urza's Saga
19%inclusion4 decks21 decks
7%synergy
Wasteland
10%inclusion2 decks21 decks
9%synergy
Phyrexian Tower
10%inclusion2 decks21 decks
6%synergy
Hall of Heliod's Generosity
10%inclusion2 decks21 decks
-4%synergy
Bazaar of Baghdad
10%inclusion2 decks21 decks
9%synergy
Strip Mine
10%inclusion2 decks21 decks
8%synergy
Mana Artifacts
Arcane Signet
100%inclusion21 decks21 decks
12%synergy
Sol Ring
100%inclusion21 decks21 decks
10%synergy
Mox Diamond
95%inclusion20 decks21 decks
88%synergy
Lotus Petal
90%inclusion19 decks21 decks
80%synergy
Lion's Eye Diamond
81%inclusion17 decks21 decks
79%synergy
Mox Opal
71%inclusion15 decks21 decks
63%synergy
Talisman of Dominance
62%inclusion13 decks21 decks
12%synergy
Fellwar Stone
62%inclusion13 decks21 decks
28%synergy
Grim Monolith
52%inclusion11 decks21 decks
49%synergy
Talisman of Progress
38%inclusion8 decks21 decks
-6%synergy
Mox Amber
24%inclusion5 decks21 decks
18%synergy
Talisman of Hierarchy
14%inclusion3 decks21 decks
-30%synergy
Lands
Tundra
100%inclusion21 decks21 decks
84%synergy
Underground Sea
100%inclusion21 decks21 decks
84%synergy
Godless Shrine
100%inclusion21 decks21 decks
49%synergy
Scrubland
100%inclusion21 decks21 decks
84%synergy
Marsh Flats
100%inclusion21 decks21 decks
64%synergy
Polluted Delta
100%inclusion21 decks21 decks
62%synergy
Flooded Strand
100%inclusion21 decks21 decks
62%synergy
Watery Grave
100%inclusion21 decks21 decks
49%synergy
Command Tower
95%inclusion20 decks21 decks
3%synergy
Mana Confluence
95%inclusion20 decks21 decks
81%synergy
Hallowed Fountain
95%inclusion20 decks21 decks
45%synergy
Bloodstained Mire
95%inclusion20 decks21 decks
84%synergy
Gemstone Caverns
90%inclusion19 decks21 decks
83%synergy
Scalding Tarn
90%inclusion19 decks21 decks
80%synergy
City of Brass
90%inclusion19 decks21 decks
76%synergy
Misty Rainforest
86%inclusion18 decks21 decks
75%synergy
Verdant Catacombs
86%inclusion18 decks21 decks
76%synergy
Windswept Heath
81%inclusion17 decks21 decks
71%synergy
Undercity Sewers
76%inclusion16 decks21 decks
62%synergy
Exotic Orchard
71%inclusion15 decks21 decks
13%synergy
Arid Mesa
71%inclusion15 decks21 decks
62%synergy
Morphic Pool
62%inclusion13 decks21 decks
28%synergy
Starting Town
44%inclusion4 decks9 decks
40%synergy
Sea of Clouds
43%inclusion9 decks21 decks
8%synergy
Vault of Champions
43%inclusion9 decks21 decks
10%synergy
Island
38%inclusion8 decks21 decks
-55%synergy
Swamp
24%inclusion5 decks21 decks
-68%synergy
Sink into Stupor
19%inclusion4 decks21 decks
6%synergy
Tarnished Citadel
14%inclusion3 decks21 decks
14%synergy
Meticulous Archive
14%inclusion3 decks21 decks
0%synergy
Forbidden Orchard
14%inclusion3 decks21 decks
12%synergy
Shadowy Backstreet
10%inclusion2 decks21 decks
-3%synergy
Spire of Industry
10%inclusion2 decks21 decks
1%synergy
Cavern of Souls
10%inclusion2 decks21 decks
3%synergy
Plains
10%inclusion2 decks21 decks
-82%synergy
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