The Master of Keys (Commander) - Expensive

The Master of Keys
Rank #300
842decks
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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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Enchantments
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Utility Lands
Mana Artifacts
Lands
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Doctor Doom, Unrivaled
5.0%inclusion2 decks40 decks
5%synergy
The Mind Stone
2.6%inclusion2 decks76 decks
1%synergy
King T'Challa
2.3%inclusion1 decks44 decks
-0%synergy
M.O.D.O.K.
2.3%inclusion1 decks44 decks
2%synergy
High Synergy Cards
Necromancy
96%inclusion806 decks842 decks
91%synergy
Intuition
93%inclusion780 decks842 decks
91%synergy
Abdel Adrian, Gorion's Ward
90%inclusion758 decks842 decks
88%synergy
Animate Dead
97%inclusion813 decks842 decks
87%synergy
Entomb
93%inclusion787 decks842 decks
87%synergy
Dance of the Dead
89%inclusion748 decks842 decks
87%synergy
Tainted Pact
93%inclusion785 decks842 decks
87%synergy
Dress Down
87%inclusion733 decks842 decks
85%synergy
Silence
94%inclusion791 decks842 decks
84%synergy
Orcish Bowmasters
93%inclusion786 decks842 decks
83%synergy
Top Cards
Mystic Remora
99%inclusion833 decks842 decks
79%synergy
Esper Sentinel
98%inclusion829 decks842 decks
71%synergy
Dark Ritual
95%inclusion804 decks842 decks
75%synergy
Smothering Tithe
95%inclusion798 decks842 decks
65%synergy
Swan Song
92%inclusion771 decks842 decks
71%synergy
Force of Negation
91%inclusion767 decks842 decks
79%synergy
Flusterstorm
91%inclusion766 decks842 decks
83%synergy
Mindbreak Trap
89%inclusion746 decks842 decks
82%synergy
Imperial Seal
87%inclusion734 decks842 decks
80%synergy
Demonic Consultation
87%inclusion730 decks842 decks
79%synergy
Game Changers
Rhystic Study
100%inclusion838 decks842 decks
69%synergy
Vampiric Tutor
99%inclusion833 decks842 decks
82%synergy
Demonic Tutor
99%inclusion830 decks842 decks
78%synergy
Force of Will
98%inclusion827 decks842 decks
86%synergy
Mana Vault
98%inclusion826 decks842 decks
90%synergy
Mox Diamond
98%inclusion826 decks842 decks
91%synergy
Chrome Mox
97%inclusion820 decks842 decks
88%synergy
Enlightened Tutor
97%inclusion819 decks842 decks
79%synergy
Ancient Tomb
97%inclusion818 decks842 decks
85%synergy
Thassa's Oracle
96%inclusion808 decks842 decks
87%synergy
Creatures
Grand Abolisher
86%inclusion722 decks842 decks
71%synergy
Ranger-Captain of Eos
86%inclusion720 decks842 decks
80%synergy
Lotho, Corrupt Shirriff
81%inclusion681 decks842 decks
64%synergy
Valley Floodcaller
75%inclusion634 decks842 decks
72%synergy
Opposition Agent
57%inclusion484 decks842 decks
50%synergy
Voice of Victory
57%inclusion241 decks424 decks
48%synergy
Wan Shi Tong, Librarian
55%inclusion113 decks205 decks
50%synergy
Displacer Kitten
53%inclusion446 decks842 decks
46%synergy
Hullbreaker Horror
50%inclusion418 decks842 decks
44%synergy
Auriok Salvagers
48%inclusion406 decks842 decks
48%synergy
Mockingbird
46%inclusion386 decks842 decks
42%synergy
Drannith Magistrate
43%inclusion365 decks842 decks
36%synergy
Archivist of Oghma
39%inclusion329 decks842 decks
33%synergy
Lurrus of the Dream-Den
35%inclusion296 decks842 decks
34%synergy
Tataru Taru
34%inclusion116 decks345 decks
25%synergy
Ledger Shredder
30%inclusion252 decks842 decks
21%synergy
Talion, the Kindly Lord
26%inclusion219 decks842 decks
19%synergy
Phyrexian Metamorph
25%inclusion210 decks842 decks
17%synergy
Faerie Mastermind
24%inclusion205 decks842 decks
15%synergy
Exhibition Tidecaller
22%inclusion22 decks100 decks
21%synergy
Pollywog Prodigy
21%inclusion177 decks842 decks
18%synergy
Psychic Frog
20%inclusion165 decks842 decks
12%synergy
Hedron Crab
19%inclusion162 decks842 decks
19%synergy
Ghostly Pilferer
14%inclusion114 decks842 decks
6%synergy
Dauthi Voidwalker
12%inclusion100 decks842 decks
6%synergy
Hoarding Broodlord
8.8%inclusion74 decks842 decks
7%synergy
Snapcaster Mage
8.7%inclusion73 decks842 decks
7%synergy
Gilded Drake
8.6%inclusion72 decks842 decks
7%synergy
High Fae Trickster
8.0%inclusion51 decks639 decks
4%synergy
Leonin Relic-Warder
7.5%inclusion63 decks842 decks
7%synergy
Volatile Stormdrake
6.8%inclusion57 decks842 decks
6%synergy
Emet-Selch of the Third Seat
5.2%inclusion18 decks346 decks
-4%synergy
Instants
Mental Misstep
86%inclusion727 decks842 decks
80%synergy
Pact of Negation
86%inclusion723 decks842 decks
79%synergy
Borne Upon a Wind
77%inclusion646 decks842 decks
72%synergy
Swords to Plowshares
75%inclusion630 decks842 decks
7%synergy
Fierce Guardianship
74%inclusion624 decks842 decks
54%synergy
Mystical Tutor
69%inclusion585 decks842 decks
59%synergy
Cabal Ritual
64%inclusion535 decks842 decks
60%synergy
An Offer You Can't Refuse
59%inclusion493 decks842 decks
31%synergy
Cyclonic Rift
58%inclusion487 decks842 decks
35%synergy
Chain of Vapor
48%inclusion400 decks842 decks
45%synergy
Mana Drain
34%inclusion290 decks842 decks
17%synergy
Into the Flood Maw
34%inclusion285 decks842 decks
30%synergy
Gifts Ungiven
31%inclusion259 decks842 decks
28%synergy
Sink into Stupor
25%inclusion210 decks842 decks
12%synergy
Ad Nauseam
24%inclusion204 decks842 decks
22%synergy
Culling the Weak
20%inclusion166 decks842 decks
18%synergy
Retraction Helix
19%inclusion157 decks842 decks
18%synergy
Brain Freeze
16%inclusion137 decks842 decks
16%synergy
Darkblast
14%inclusion118 decks842 decks
14%synergy
Path to Exile
14%inclusion117 decks842 decks
-28%synergy
Banishing Knack
12%inclusion99 decks842 decks
11%synergy
Dispel
9.3%inclusion78 decks842 decks
6%synergy
Orim's Chant
7.8%inclusion66 decks842 decks
6%synergy
Deadly Rollick
7.5%inclusion63 decks842 decks
-8%synergy
Saw in Half
7.5%inclusion63 decks842 decks
5%synergy
Strix Serenade
6.2%inclusion52 decks842 decks
3%synergy
Dramatic Reversal
6.1%inclusion51 decks842 decks
4%synergy
Sacrifice
5.3%inclusion45 decks842 decks
5%synergy
Rain of Filth
5.1%inclusion43 decks842 decks
5%synergy
Misdirection
5.1%inclusion43 decks842 decks
3%synergy
Sorceries
Sevinne's Reclamation
72%inclusion605 decks842 decks
63%synergy
Reanimate
35%inclusion292 decks842 decks
18%synergy
Toxic Deluge
33%inclusion279 decks842 decks
13%synergy
Windfall
30%inclusion251 decks842 decks
17%synergy
Beseech the Mirror
27%inclusion230 decks842 decks
23%synergy
Mnemonic Betrayal
25%inclusion208 decks842 decks
22%synergy
Lively Dirge
22%inclusion186 decks842 decks
21%synergy
Demonic Counsel
15%inclusion123 decks842 decks
14%synergy
Yawgmoth's Will
14%inclusion114 decks842 decks
12%synergy
Flash Photography
13%inclusion29 decks215 decks
12%synergy
Praetor's Grasp
11%inclusion92 decks842 decks
8%synergy
Cabal Therapy
11%inclusion91 decks842 decks
11%synergy
Diabolic Intent
10%inclusion82 decks842 decks
5%synergy
Unmarked Grave
10%inclusion81 decks842 decks
8%synergy
Utility Artifacts
The One Ring
81%inclusion685 decks842 decks
69%synergy
Wishclaw Talisman
70%inclusion592 decks842 decks
63%synergy
Cursed Totem
9.1%inclusion77 decks842 decks
7%synergy
Vexing Bauble
7.8%inclusion66 decks842 decks
6%synergy
Mesmeric Orb
7.1%inclusion60 decks842 decks
6%synergy
Isochron Scepter
5.6%inclusion47 decks842 decks
4%synergy
Enchantments
Necropotence
71%inclusion601 decks842 decks
65%synergy
Tinybones Joins Up
64%inclusion537 decks842 decks
63%synergy
Blind Obedience
61%inclusion514 decks842 decks
49%synergy
Copy Artifact
53%inclusion446 decks842 decks
52%synergy
Amphibian Downpour
49%inclusion415 decks842 decks
45%synergy
Ripples of Undeath
49%inclusion410 decks842 decks
46%synergy
Touch the Spirit Realm
44%inclusion367 decks842 decks
41%synergy
The Meathook Massacre
38%inclusion318 decks842 decks
35%synergy
Mirrormade
36%inclusion300 decks842 decks
26%synergy
Static Prison
34%inclusion288 decks842 decks
34%synergy
Steal Enchantment
31%inclusion261 decks842 decks
30%synergy
Chains of Mephistopheles
20%inclusion167 decks842 decks
20%synergy
Counterbalance
19%inclusion163 decks842 decks
18%synergy
Trouble in Pairs
19%inclusion161 decks842 decks
14%synergy
Founding the Third Path
18%inclusion152 decks842 decks
18%synergy
Copy Enchantment
17%inclusion141 decks842 decks
12%synergy
Chthonian Nightmare
12%inclusion100 decks842 decks
11%synergy
Seal of Removal
7.8%inclusion66 decks842 decks
7%synergy
Monologue Tax
7.2%inclusion61 decks842 decks
1%synergy
Leyline of Anticipation
6.9%inclusion58 decks842 decks
3%synergy
Power Artifact
6.9%inclusion58 decks842 decks
7%synergy
Aura of Silence
6.7%inclusion56 decks842 decks
4%synergy
Seal of Cleansing
6.5%inclusion55 decks842 decks
5%synergy
Dance of Many
5.7%inclusion48 decks842 decks
6%synergy
Charitable Levy
5.1%inclusion43 decks842 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
53%inclusion445 decks842 decks
45%synergy
Utility Lands
Otawara, Soaring City
93%inclusion780 decks842 decks
74%synergy
Urza's Saga
45%inclusion382 decks842 decks
34%synergy
Minamo, School at Water's Edge
35%inclusion296 decks842 decks
31%synergy
Emergence Zone
29%inclusion240 decks842 decks
27%synergy
City of Traitors
27%inclusion231 decks842 decks
26%synergy
Serra's Sanctum
23%inclusion195 decks842 decks
21%synergy
Cephalid Coliseum
22%inclusion184 decks842 decks
18%synergy
Takenuma, Abandoned Mire
10%inclusion83 decks842 decks
4%synergy
Urborg, Tomb of Yawgmoth
8.3%inclusion70 decks842 decks
-5%synergy
Hall of Heliod's Generosity
5.6%inclusion47 decks842 decks
-7%synergy
Phyrexian Tower
5.1%inclusion43 decks842 decks
2%synergy
Mana Artifacts
Sol Ring
100%inclusion840 decks842 decks
10%synergy
Arcane Signet
97%inclusion817 decks842 decks
9%synergy
Lotus Petal
96%inclusion808 decks842 decks
86%synergy
Mox Opal
87%inclusion734 decks842 decks
79%synergy
Lion's Eye Diamond
85%inclusion718 decks842 decks
83%synergy
Talisman of Dominance
83%inclusion696 decks842 decks
32%synergy
Fellwar Stone
80%inclusion672 decks842 decks
47%synergy
Grim Monolith
54%inclusion455 decks842 decks
51%synergy
Talisman of Progress
49%inclusion413 decks842 decks
4%synergy
Mox Amber
40%inclusion335 decks842 decks
34%synergy
Talisman of Hierarchy
29%inclusion247 decks842 decks
-16%synergy
Basalt Monolith
6.9%inclusion58 decks842 decks
5%synergy
Lands
Tundra
100%inclusion840 decks842 decks
84%synergy
Scrubland
100%inclusion840 decks842 decks
84%synergy
Underground Sea
100%inclusion839 decks842 decks
84%synergy
Watery Grave
99%inclusion837 decks842 decks
48%synergy
Polluted Delta
99%inclusion834 decks842 decks
61%synergy
Command Tower
98%inclusion829 decks842 decks
6%synergy
Hallowed Fountain
98%inclusion828 decks842 decks
47%synergy
Flooded Strand
98%inclusion828 decks842 decks
60%synergy
Marsh Flats
98%inclusion824 decks842 decks
62%synergy
Godless Shrine
95%inclusion801 decks842 decks
43%synergy
Mana Confluence
94%inclusion795 decks842 decks
81%synergy
Gemstone Caverns
94%inclusion792 decks842 decks
87%synergy
City of Brass
93%inclusion786 decks842 decks
78%synergy
Misty Rainforest
88%inclusion745 decks842 decks
78%synergy
Bloodstained Mire
86%inclusion720 decks842 decks
75%synergy
Verdant Catacombs
84%inclusion710 decks842 decks
75%synergy
Scalding Tarn
83%inclusion700 decks842 decks
73%synergy
Windswept Heath
73%inclusion612 decks842 decks
63%synergy
Exotic Orchard
68%inclusion574 decks842 decks
9%synergy
Arid Mesa
68%inclusion570 decks842 decks
58%synergy
Morphic Pool
66%inclusion556 decks842 decks
33%synergy
Undercity Sewers
57%inclusion479 decks842 decks
42%synergy
Sea of Clouds
52%inclusion436 decks842 decks
17%synergy
Vault of Champions
41%inclusion347 decks842 decks
9%synergy
Starting Town
36%inclusion126 decks346 decks
32%synergy
Island
33%inclusion278 decks842 decks
-60%synergy
Swamp
25%inclusion210 decks842 decks
-67%synergy
Sink into Stupor
25%inclusion210 decks842 decks
12%synergy
Meticulous Archive
21%inclusion180 decks842 decks
7%synergy
Spire of Industry
19%inclusion163 decks842 decks
12%synergy
Forbidden Orchard
18%inclusion152 decks842 decks
16%synergy
Cavern of Souls
18%inclusion148 decks842 decks
11%synergy
Plains
18%inclusion148 decks842 decks
-74%synergy
Shadowy Backstreet
15%inclusion126 decks842 decks
2%synergy
Talon Gates of Madara
12%inclusion100 decks842 decks
11%synergy
Underground River
7.6%inclusion64 decks842 decks
-28%synergy
Tarnished Citadel
6.2%inclusion52 decks842 decks
5%synergy
Silent Clearing
5.6%inclusion47 decks842 decks
3%synergy
Raffine's Tower
5.1%inclusion43 decks842 decks
-36%synergy
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