The Master of Keys (Commander) - Expensive

The Master of Keys
Rank #300
768decks
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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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Exhibition Tidecaller
26%inclusion10 decks39 decks
25%synergy
Does Machines
2.9%inclusion3 decks102 decks
3%synergy
High Synergy Cards
Necromancy
96%inclusion736 decks768 decks
91%synergy
Intuition
93%inclusion713 decks768 decks
91%synergy
Abdel Adrian, Gorion's Ward
90%inclusion692 decks768 decks
88%synergy
Animate Dead
97%inclusion742 decks768 decks
87%synergy
Dance of the Dead
89%inclusion684 decks768 decks
87%synergy
Entomb
94%inclusion719 decks768 decks
87%synergy
Tainted Pact
93%inclusion715 decks768 decks
86%synergy
Dress Down
86%inclusion663 decks768 decks
84%synergy
Silence
93%inclusion717 decks768 decks
83%synergy
Orcish Bowmasters
93%inclusion716 decks768 decks
83%synergy
Top Cards
Mystic Remora
99%inclusion761 decks768 decks
78%synergy
Esper Sentinel
98%inclusion754 decks768 decks
71%synergy
Dark Ritual
95%inclusion733 decks768 decks
76%synergy
Smothering Tithe
94%inclusion724 decks768 decks
64%synergy
Swan Song
92%inclusion703 decks768 decks
72%synergy
Flusterstorm
90%inclusion695 decks768 decks
83%synergy
Force of Negation
90%inclusion695 decks768 decks
79%synergy
Mindbreak Trap
88%inclusion676 decks768 decks
81%synergy
Demonic Consultation
87%inclusion667 decks768 decks
79%synergy
Imperial Seal
86%inclusion661 decks768 decks
79%synergy
Game Changers
Rhystic Study
99%inclusion764 decks768 decks
69%synergy
Vampiric Tutor
99%inclusion762 decks768 decks
82%synergy
Demonic Tutor
99%inclusion759 decks768 decks
78%synergy
Mana Vault
98%inclusion754 decks768 decks
89%synergy
Mox Diamond
98%inclusion754 decks768 decks
91%synergy
Force of Will
98%inclusion752 decks768 decks
86%synergy
Chrome Mox
97%inclusion748 decks768 decks
88%synergy
Ancient Tomb
97%inclusion747 decks768 decks
85%synergy
Enlightened Tutor
97%inclusion746 decks768 decks
78%synergy
Thassa's Oracle
96%inclusion738 decks768 decks
87%synergy
Creatures
Grand Abolisher
86%inclusion658 decks768 decks
71%synergy
Ranger-Captain of Eos
85%inclusion651 decks768 decks
79%synergy
Lotho, Corrupt Shirriff
80%inclusion617 decks768 decks
63%synergy
Valley Floodcaller
75%inclusion578 decks768 decks
71%synergy
Wan Shi Tong, Librarian
60%inclusion93 decks154 decks
55%synergy
Voice of Victory
58%inclusion213 decks367 decks
50%synergy
Opposition Agent
58%inclusion444 decks768 decks
50%synergy
Displacer Kitten
54%inclusion413 decks768 decks
47%synergy
Hullbreaker Horror
49%inclusion380 decks768 decks
43%synergy
Auriok Salvagers
48%inclusion370 decks768 decks
48%synergy
Mockingbird
46%inclusion352 decks768 decks
41%synergy
Drannith Magistrate
44%inclusion335 decks768 decks
36%synergy
Archivist of Oghma
40%inclusion305 decks768 decks
33%synergy
Lurrus of the Dream-Den
36%inclusion275 decks768 decks
34%synergy
Tataru Taru
35%inclusion101 decks291 decks
26%synergy
Ledger Shredder
30%inclusion230 decks768 decks
21%synergy
Talion, the Kindly Lord
27%inclusion207 decks768 decks
19%synergy
Phyrexian Metamorph
25%inclusion190 decks768 decks
17%synergy
Faerie Mastermind
23%inclusion175 decks768 decks
13%synergy
Pollywog Prodigy
21%inclusion163 decks768 decks
18%synergy
Hedron Crab
20%inclusion155 decks768 decks
20%synergy
Psychic Frog
20%inclusion153 decks768 decks
13%synergy
Ghostly Pilferer
14%inclusion104 decks768 decks
6%synergy
Dauthi Voidwalker
13%inclusion97 decks768 decks
7%synergy
Gilded Drake
9.0%inclusion69 decks768 decks
7%synergy
Hoarding Broodlord
8.9%inclusion68 decks768 decks
7%synergy
Snapcaster Mage
8.1%inclusion62 decks768 decks
6%synergy
Leonin Relic-Warder
8.1%inclusion62 decks768 decks
8%synergy
High Fae Trickster
7.7%inclusion44 decks575 decks
3%synergy
Volatile Stormdrake
7.4%inclusion57 decks768 decks
6%synergy
Emet-Selch of the Third Seat
5.5%inclusion16 decks292 decks
-4%synergy
Instants
Mental Misstep
86%inclusion661 decks768 decks
80%synergy
Pact of Negation
85%inclusion655 decks768 decks
78%synergy
Borne Upon a Wind
76%inclusion583 decks768 decks
71%synergy
Swords to Plowshares
74%inclusion571 decks768 decks
6%synergy
Fierce Guardianship
74%inclusion571 decks768 decks
54%synergy
Mystical Tutor
70%inclusion536 decks768 decks
59%synergy
Cabal Ritual
65%inclusion498 decks768 decks
61%synergy
An Offer You Can't Refuse
58%inclusion446 decks768 decks
31%synergy
Cyclonic Rift
58%inclusion445 decks768 decks
35%synergy
Chain of Vapor
48%inclusion365 decks768 decks
44%synergy
Mana Drain
35%inclusion272 decks768 decks
18%synergy
Into the Flood Maw
34%inclusion264 decks768 decks
31%synergy
Gifts Ungiven
30%inclusion233 decks768 decks
28%synergy
Ad Nauseam
25%inclusion190 decks768 decks
23%synergy
Sink into Stupor
24%inclusion184 decks768 decks
11%synergy
Culling the Weak
20%inclusion156 decks768 decks
19%synergy
Retraction Helix
19%inclusion147 decks768 decks
18%synergy
Brain Freeze
17%inclusion128 decks768 decks
16%synergy
Path to Exile
14%inclusion109 decks768 decks
-28%synergy
Darkblast
14%inclusion108 decks768 decks
14%synergy
Banishing Knack
12%inclusion92 decks768 decks
12%synergy
Dispel
8.9%inclusion68 decks768 decks
6%synergy
Orim's Chant
7.7%inclusion59 decks768 decks
6%synergy
Deadly Rollick
7.4%inclusion57 decks768 decks
-8%synergy
Saw in Half
7.4%inclusion57 decks768 decks
5%synergy
Strix Serenade
6.6%inclusion51 decks768 decks
3%synergy
Dramatic Reversal
5.9%inclusion45 decks768 decks
4%synergy
Lim-Dûl's Vault
5.7%inclusion44 decks768 decks
3%synergy
Sacrifice
5.5%inclusion42 decks768 decks
5%synergy
Rain of Filth
5.5%inclusion42 decks768 decks
5%synergy
Sorceries
Sevinne's Reclamation
73%inclusion557 decks768 decks
64%synergy
Reanimate
35%inclusion272 decks768 decks
19%synergy
Toxic Deluge
34%inclusion260 decks768 decks
14%synergy
Windfall
30%inclusion228 decks768 decks
16%synergy
Beseech the Mirror
26%inclusion202 decks768 decks
22%synergy
Mnemonic Betrayal
25%inclusion192 decks768 decks
22%synergy
Lively Dirge
21%inclusion165 decks768 decks
20%synergy
Demonic Counsel
15%inclusion117 decks768 decks
14%synergy
Yawgmoth's Will
13%inclusion102 decks768 decks
12%synergy
Cabal Therapy
11%inclusion85 decks768 decks
11%synergy
Praetor's Grasp
11%inclusion82 decks768 decks
8%synergy
Flash Photography
10%inclusion17 decks166 decks
9%synergy
Unmarked Grave
10%inclusion76 decks768 decks
9%synergy
Diabolic Intent
10%inclusion75 decks768 decks
5%synergy
Utility Artifacts
The One Ring
82%inclusion627 decks768 decks
69%synergy
Wishclaw Talisman
70%inclusion539 decks768 decks
62%synergy
Cursed Totem
9.2%inclusion71 decks768 decks
7%synergy
Vexing Bauble
7.9%inclusion61 decks768 decks
6%synergy
Mesmeric Orb
7.4%inclusion57 decks768 decks
6%synergy
Sensei's Divining Top
5.5%inclusion42 decks768 decks
-4%synergy
Isochron Scepter
5.5%inclusion42 decks768 decks
3%synergy
Enchantments
Necropotence
71%inclusion549 decks768 decks
65%synergy
Tinybones Joins Up
64%inclusion489 decks768 decks
63%synergy
Blind Obedience
60%inclusion460 decks768 decks
48%synergy
Copy Artifact
51%inclusion395 decks768 decks
50%synergy
Amphibian Downpour
49%inclusion380 decks768 decks
45%synergy
Ripples of Undeath
48%inclusion369 decks768 decks
45%synergy
Touch the Spirit Realm
43%inclusion328 decks768 decks
40%synergy
The Meathook Massacre
37%inclusion287 decks768 decks
34%synergy
Static Prison
36%inclusion274 decks768 decks
35%synergy
Mirrormade
35%inclusion267 decks768 decks
25%synergy
Steal Enchantment
31%inclusion236 decks768 decks
30%synergy
Chains of Mephistopheles
21%inclusion162 decks768 decks
21%synergy
Trouble in Pairs
20%inclusion153 decks768 decks
15%synergy
Counterbalance
20%inclusion150 decks768 decks
18%synergy
Founding the Third Path
18%inclusion138 decks768 decks
18%synergy
Copy Enchantment
15%inclusion112 decks768 decks
10%synergy
Chthonian Nightmare
12%inclusion92 decks768 decks
11%synergy
Seal of Removal
8.3%inclusion64 decks768 decks
8%synergy
Monologue Tax
7.2%inclusion55 decks768 decks
1%synergy
Power Artifact
6.9%inclusion53 decks768 decks
7%synergy
Seal of Cleansing
6.9%inclusion53 decks768 decks
5%synergy
Aura of Silence
6.6%inclusion51 decks768 decks
3%synergy
Leyline of Anticipation
6.4%inclusion49 decks768 decks
2%synergy
Mornsong Aria
6.4%inclusion7 decks110 decks
6%synergy
Dance of Many
5.9%inclusion45 decks768 decks
6%synergy
Charitable Levy
5.3%inclusion41 decks768 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
53%inclusion408 decks768 decks
45%synergy
Utility Lands
Otawara, Soaring City
93%inclusion711 decks768 decks
74%synergy
Urza's Saga
45%inclusion349 decks768 decks
34%synergy
Minamo, School at Water's Edge
37%inclusion281 decks768 decks
33%synergy
Emergence Zone
29%inclusion223 decks768 decks
27%synergy
City of Traitors
29%inclusion222 decks768 decks
28%synergy
Serra's Sanctum
23%inclusion176 decks768 decks
21%synergy
Cephalid Coliseum
22%inclusion172 decks768 decks
19%synergy
Takenuma, Abandoned Mire
10%inclusion76 decks768 decks
4%synergy
Urborg, Tomb of Yawgmoth
8.3%inclusion64 decks768 decks
-5%synergy
Phyrexian Tower
5.9%inclusion45 decks768 decks
2%synergy
Hall of Heliod's Generosity
5.9%inclusion45 decks768 decks
-7%synergy
Mana Artifacts
Sol Ring
100%inclusion766 decks768 decks
10%synergy
Arcane Signet
97%inclusion748 decks768 decks
10%synergy
Lotus Petal
96%inclusion740 decks768 decks
86%synergy
Mox Opal
87%inclusion666 decks768 decks
78%synergy
Lion's Eye Diamond
86%inclusion664 decks768 decks
84%synergy
Talisman of Dominance
83%inclusion634 decks768 decks
33%synergy
Fellwar Stone
80%inclusion611 decks768 decks
46%synergy
Grim Monolith
56%inclusion430 decks768 decks
53%synergy
Talisman of Progress
50%inclusion383 decks768 decks
6%synergy
Mox Amber
40%inclusion311 decks768 decks
34%synergy
Talisman of Hierarchy
31%inclusion236 decks768 decks
-14%synergy
Basalt Monolith
7.0%inclusion54 decks768 decks
5%synergy
Lands
Scrubland
100%inclusion767 decks768 decks
84%synergy
Tundra
100%inclusion766 decks768 decks
84%synergy
Underground Sea
100%inclusion765 decks768 decks
84%synergy
Watery Grave
99%inclusion762 decks768 decks
48%synergy
Polluted Delta
99%inclusion761 decks768 decks
61%synergy
Flooded Strand
99%inclusion757 decks768 decks
60%synergy
Command Tower
98%inclusion754 decks768 decks
6%synergy
Hallowed Fountain
98%inclusion754 decks768 decks
48%synergy
Marsh Flats
98%inclusion751 decks768 decks
62%synergy
Godless Shrine
95%inclusion728 decks768 decks
43%synergy
Mana Confluence
94%inclusion721 decks768 decks
80%synergy
Gemstone Caverns
94%inclusion719 decks768 decks
86%synergy
City of Brass
93%inclusion713 decks768 decks
78%synergy
Misty Rainforest
89%inclusion683 decks768 decks
78%synergy
Bloodstained Mire
86%inclusion658 decks768 decks
75%synergy
Verdant Catacombs
85%inclusion652 decks768 decks
75%synergy
Scalding Tarn
84%inclusion643 decks768 decks
73%synergy
Windswept Heath
73%inclusion557 decks768 decks
63%synergy
Arid Mesa
67%inclusion518 decks768 decks
58%synergy
Exotic Orchard
67%inclusion515 decks768 decks
8%synergy
Morphic Pool
64%inclusion494 decks768 decks
31%synergy
Undercity Sewers
56%inclusion432 decks768 decks
42%synergy
Sea of Clouds
51%inclusion388 decks768 decks
15%synergy
Vault of Champions
40%inclusion307 decks768 decks
8%synergy
Starting Town
38%inclusion111 decks292 decks
34%synergy
Island
33%inclusion255 decks768 decks
-60%synergy
Swamp
25%inclusion193 decks768 decks
-67%synergy
Sink into Stupor
24%inclusion184 decks768 decks
11%synergy
Meticulous Archive
22%inclusion171 decks768 decks
8%synergy
Forbidden Orchard
18%inclusion141 decks768 decks
16%synergy
Spire of Industry
18%inclusion139 decks768 decks
10%synergy
Plains
18%inclusion139 decks768 decks
-74%synergy
Cavern of Souls
18%inclusion136 decks768 decks
11%synergy
Shadowy Backstreet
16%inclusion120 decks768 decks
3%synergy
Talon Gates of Madara
12%inclusion92 decks768 decks
11%synergy
Underground River
7.6%inclusion58 decks768 decks
-27%synergy
Tarnished Citadel
6.0%inclusion46 decks768 decks
5%synergy
Silent Clearing
5.6%inclusion43 decks768 decks
3%synergy
Raffine's Tower
5.2%inclusion40 decks768 decks
-36%synergy
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