The Master of Keys (Commander) - Expensive Optimized

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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Enchantments
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Utility Lands
Mana Artifacts
Lands
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Abdel Adrian, Gorion's Ward
89%inclusion24 decks27 decks
87%synergy
Necromancy
89%inclusion24 decks27 decks
84%synergy
Animate Dead
93%inclusion25 decks27 decks
83%synergy
Entomb
89%inclusion24 decks27 decks
82%synergy
Dress Down
81%inclusion22 decks27 decks
79%synergy
Dance of the Dead
78%inclusion21 decks27 decks
76%synergy
Tinybones Joins Up
74%inclusion20 decks27 decks
73%synergy
Mystic Remora
93%inclusion25 decks27 decks
72%synergy
Valley Floodcaller
74%inclusion20 decks27 decks
70%synergy
Intuition
70%inclusion19 decks27 decks
69%synergy
Top Cards
Esper Sentinel
89%inclusion24 decks27 decks
62%synergy
Dark Ritual
81%inclusion22 decks27 decks
62%synergy
Orcish Bowmasters
78%inclusion21 decks27 decks
67%synergy
Blind Obedience
74%inclusion20 decks27 decks
62%synergy
Swords to Plowshares
74%inclusion20 decks27 decks
6%synergy
Thassa's Oracle
74%inclusion20 decks27 decks
65%synergy
Force of Will
74%inclusion20 decks27 decks
62%synergy
Lotho, Corrupt Shirriff
67%inclusion18 decks27 decks
50%synergy
Sevinne's Reclamation
67%inclusion18 decks27 decks
58%synergy
Silence
67%inclusion18 decks27 decks
57%synergy
Game Changers
Vampiric Tutor
100%inclusion27 decks27 decks
83%synergy
Enlightened Tutor
96%inclusion26 decks27 decks
77%synergy
Rhystic Study
96%inclusion26 decks27 decks
65%synergy
Smothering Tithe
93%inclusion25 decks27 decks
61%synergy
Ancient Tomb
93%inclusion25 decks27 decks
80%synergy
Demonic Tutor
93%inclusion25 decks27 decks
72%synergy
Chrome Mox
89%inclusion24 decks27 decks
80%synergy
Mox Diamond
85%inclusion23 decks27 decks
78%synergy
Mana Vault
85%inclusion23 decks27 decks
76%synergy
The One Ring
81%inclusion22 decks27 decks
68%synergy
Creatures
Grand Abolisher
59%inclusion16 decks27 decks
45%synergy
Ranger-Captain of Eos
52%inclusion14 decks27 decks
46%synergy
Opposition Agent
52%inclusion14 decks27 decks
43%synergy
Displacer Kitten
44%inclusion12 decks27 decks
38%synergy
Auriok Salvagers
44%inclusion12 decks27 decks
44%synergy
Drannith Magistrate
44%inclusion12 decks27 decks
37%synergy
Wan Shi Tong, Librarian
44%inclusion4 decks9 decks
39%synergy
Hullbreaker Horror
41%inclusion11 decks27 decks
35%synergy
Ledger Shredder
41%inclusion11 decks27 decks
32%synergy
Lurrus of the Dream-Den
33%inclusion9 decks27 decks
32%synergy
Voice of Victory
30%inclusion6 decks20 decks
22%synergy
Archivist of Oghma
30%inclusion8 decks27 decks
23%synergy
Psychic Frog
30%inclusion8 decks27 decks
23%synergy
Mockingbird
26%inclusion7 decks27 decks
22%synergy
Talion, the Kindly Lord
26%inclusion7 decks27 decks
18%synergy
Victor, Valgavoth's Seneschal
22%inclusion6 decks27 decks
20%synergy
Inquisitive Glimmer
22%inclusion6 decks27 decks
15%synergy
Overlord of the Balemurk
19%inclusion5 decks27 decks
17%synergy
Entity Tracker
19%inclusion5 decks27 decks
12%synergy
Phyrexian Metamorph
19%inclusion5 decks27 decks
10%synergy
Starfield Mystic
19%inclusion5 decks27 decks
12%synergy
Hedron Crab
19%inclusion5 decks27 decks
18%synergy
Hoarding Broodlord
15%inclusion4 decks27 decks
13%synergy
Scrabbling Skullcrab
15%inclusion4 decks27 decks
14%synergy
Heliod, the Radiant Dawn
15%inclusion4 decks27 decks
11%synergy
Mesa Enchantress
15%inclusion4 decks27 decks
6%synergy
Pollywog Prodigy
15%inclusion4 decks27 decks
11%synergy
Tataru Taru
11%inclusion2 decks18 decks
3%synergy
Snapcaster Mage
11%inclusion3 decks27 decks
9%synergy
Faerie Mastermind
11%inclusion3 decks27 decks
2%synergy
Grim Guardian
11%inclusion3 decks27 decks
9%synergy
Ondu Spiritdancer
11%inclusion3 decks27 decks
5%synergy
Fear of Impostors
11%inclusion3 decks27 decks
10%synergy
Leonin Relic-Warder
11%inclusion3 decks27 decks
11%synergy
Volatile Stormdrake
7.4%inclusion2 decks27 decks
6%synergy
Enduring Curiosity
7.4%inclusion2 decks27 decks
-1%synergy
Tameshi, Reality Architect
7.4%inclusion2 decks27 decks
7%synergy
Zur, Eternal Schemer
7.4%inclusion2 decks27 decks
4%synergy
Emry, Lurker of the Loch
7.4%inclusion2 decks27 decks
2%synergy
Sheoldred, the Apocalypse
7.4%inclusion2 decks27 decks
-1%synergy
Demon of Fate's Design
7.4%inclusion2 decks27 decks
2%synergy
Moon-Blessed Cleric
7.4%inclusion2 decks27 decks
3%synergy
Enduring Tenacity
7.4%inclusion2 decks27 decks
0%synergy
Overlord of the Floodpits
7.4%inclusion2 decks27 decks
4%synergy
Spirited Companion
7.4%inclusion2 decks27 decks
6%synergy
Aura Thief
7.4%inclusion2 decks27 decks
7%synergy
Zur the Enchanter
7.4%inclusion2 decks27 decks
2%synergy
Instants
Fierce Guardianship
67%inclusion18 decks27 decks
46%synergy
Force of Negation
63%inclusion17 decks27 decks
51%synergy
Demonic Consultation
63%inclusion17 decks27 decks
55%synergy
Pact of Negation
63%inclusion17 decks27 decks
55%synergy
Flusterstorm
63%inclusion17 decks27 decks
55%synergy
Tainted Pact
59%inclusion16 decks27 decks
52%synergy
Mental Misstep
59%inclusion16 decks27 decks
53%synergy
Mindbreak Trap
59%inclusion16 decks27 decks
53%synergy
Borne Upon a Wind
56%inclusion15 decks27 decks
51%synergy
Cyclonic Rift
56%inclusion15 decks27 decks
32%synergy
Cabal Ritual
56%inclusion15 decks27 decks
52%synergy
Mystical Tutor
52%inclusion14 decks27 decks
41%synergy
Swan Song
48%inclusion13 decks27 decks
28%synergy
Gifts Ungiven
41%inclusion11 decks27 decks
38%synergy
Mana Drain
41%inclusion11 decks27 decks
23%synergy
An Offer You Can't Refuse
33%inclusion9 decks27 decks
6%synergy
Into the Flood Maw
33%inclusion9 decks27 decks
30%synergy
Chain of Vapor
22%inclusion6 decks27 decks
19%synergy
Brain Freeze
19%inclusion5 decks27 decks
18%synergy
Sink into Stupor
19%inclusion5 decks27 decks
6%synergy
Retraction Helix
19%inclusion5 decks27 decks
18%synergy
Path to Exile
15%inclusion4 decks27 decks
-27%synergy
Banishing Knack
15%inclusion4 decks27 decks
14%synergy
Saw in Half
15%inclusion4 decks27 decks
13%synergy
Sacrifice
11%inclusion3 decks27 decks
10%synergy
Counterspell
11%inclusion3 decks27 decks
-31%synergy
Teferi's Protection
11%inclusion3 decks27 decks
-5%synergy
Culling the Weak
11%inclusion3 decks27 decks
10%synergy
Ad Nauseam
11%inclusion3 decks27 decks
9%synergy
Brainstorm
7.4%inclusion2 decks27 decks
-10%synergy
Void Rend
7.4%inclusion2 decks27 decks
-27%synergy
Snuff Out
7.4%inclusion2 decks27 decks
-1%synergy
Deadly Rollick
7.4%inclusion2 decks27 decks
-7%synergy
Sorceries
Imperial Seal
67%inclusion18 decks27 decks
59%synergy
Beseech the Mirror
33%inclusion9 decks27 decks
29%synergy
Toxic Deluge
30%inclusion8 decks27 decks
10%synergy
Lively Dirge
22%inclusion6 decks27 decks
21%synergy
Replenish
22%inclusion6 decks27 decks
20%synergy
Reanimate
22%inclusion6 decks27 decks
6%synergy
Cabal Therapy
19%inclusion5 decks27 decks
18%synergy
Demonic Counsel
15%inclusion4 decks27 decks
14%synergy
Windfall
15%inclusion4 decks27 decks
1%synergy
Mnemonic Betrayal
15%inclusion4 decks27 decks
12%synergy
Idyllic Tutor
11%inclusion3 decks27 decks
7%synergy
Grim Tutor
7.4%inclusion2 decks27 decks
3%synergy
Redress Fate
7.4%inclusion2 decks27 decks
2%synergy
Utility Artifacts
Wishclaw Talisman
52%inclusion14 decks27 decks
44%synergy
Mesmeric Orb
19%inclusion5 decks27 decks
17%synergy
Vexing Bauble
15%inclusion4 decks27 decks
13%synergy
Sensei's Divining Top
11%inclusion3 decks27 decks
1%synergy
Whip of Erebos
7.4%inclusion2 decks27 decks
5%synergy
Codex Shredder
7.4%inclusion2 decks27 decks
7%synergy
Cursed Totem
7.4%inclusion2 decks27 decks
5%synergy
Altar of the Brood
7.4%inclusion2 decks27 decks
6%synergy
Enchantments
Ripples of Undeath
63%inclusion17 decks27 decks
60%synergy
Necropotence
63%inclusion17 decks27 decks
56%synergy
Amphibian Downpour
52%inclusion14 decks27 decks
47%synergy
Copy Artifact
41%inclusion11 decks27 decks
40%synergy
The Meathook Massacre
37%inclusion10 decks27 decks
34%synergy
Steal Enchantment
30%inclusion8 decks27 decks
29%synergy
Chthonian Nightmare
30%inclusion8 decks27 decks
29%synergy
Static Prison
26%inclusion7 decks27 decks
25%synergy
Trouble in Pairs
26%inclusion7 decks27 decks
21%synergy
Counterbalance
22%inclusion6 decks27 decks
21%synergy
Touch the Spirit Realm
22%inclusion6 decks27 decks
20%synergy
Chains of Mephistopheles
19%inclusion5 decks27 decks
18%synergy
Starfield of Nyx
19%inclusion5 decks27 decks
14%synergy
Bloodchief Ascension
19%inclusion5 decks27 decks
13%synergy
Stillness in Motion
16%inclusion3 decks19 decks
15%synergy
Cemetery Tampering
15%inclusion4 decks27 decks
14%synergy
Darksteel Mutation
15%inclusion4 decks27 decks
9%synergy
Mirrormade
15%inclusion4 decks27 decks
5%synergy
Founding the Third Path
15%inclusion4 decks27 decks
15%synergy
Land Tax
15%inclusion4 decks27 decks
9%synergy
Estrid's Invocation
11%inclusion3 decks27 decks
6%synergy
Sphere of Safety
11%inclusion3 decks27 decks
2%synergy
Enchanted Evening
11%inclusion3 decks27 decks
10%synergy
Secret Arcade // Dusty Parlor
11%inclusion3 decks27 decks
6%synergy
Leyline of Anticipation
11%inclusion3 decks27 decks
7%synergy
Ghostly Prison
11%inclusion3 decks27 decks
-11%synergy
Teval's Judgment
10%inclusion2 decks20 decks
9%synergy
Mind Over Matter
7.4%inclusion2 decks27 decks
7%synergy
Phyrexian Unlife
7.4%inclusion2 decks27 decks
6%synergy
Shark Typhoon
7.4%inclusion2 decks27 decks
2%synergy
Monologue Tax
7.4%inclusion2 decks27 decks
1%synergy
Exquisite Blood
7.4%inclusion2 decks27 decks
1%synergy
Black Market Connections
7.4%inclusion2 decks27 decks
-7%synergy
Hallowed Haunting
7.4%inclusion2 decks27 decks
5%synergy
The Cruelty of Gix
7.4%inclusion2 decks27 decks
7%synergy
Out of the Tombs
7.4%inclusion2 decks27 decks
7%synergy
Authority of the Consuls
7.4%inclusion2 decks27 decks
-5%synergy
Seal of Cleansing
7.4%inclusion2 decks27 decks
6%synergy
Dovescape
7.4%inclusion2 decks27 decks
7%synergy
Greater Auramancy
7.4%inclusion2 decks27 decks
3%synergy
Aura of Silence
7.4%inclusion2 decks27 decks
4%synergy
Propaganda
7.4%inclusion2 decks27 decks
-20%synergy
Solemnity
7.4%inclusion2 decks27 decks
4%synergy
Planeswalkers
Teferi, Time Raveler
48%inclusion13 decks27 decks
40%synergy
Tezzeret, Cruel Captain
7.1%inclusion1 decks14 decks
5%synergy
Utility Lands
Otawara, Soaring City
78%inclusion21 decks27 decks
59%synergy
Urza's Saga
41%inclusion11 decks27 decks
29%synergy
Serra's Sanctum
33%inclusion9 decks27 decks
32%synergy
Emergence Zone
26%inclusion7 decks27 decks
24%synergy
Takenuma, Abandoned Mire
26%inclusion7 decks27 decks
20%synergy
Hall of Heliod's Generosity
26%inclusion7 decks27 decks
13%synergy
Minamo, School at Water's Edge
19%inclusion5 decks27 decks
15%synergy
Cephalid Coliseum
15%inclusion4 decks27 decks
11%synergy
Urborg, Tomb of Yawgmoth
11%inclusion3 decks27 decks
-2%synergy
Uthros, Titanic Godcore
8.3%inclusion1 decks12 decks
5%synergy
Reliquary Tower
7.4%inclusion2 decks27 decks
-26%synergy
Academy Ruins
7.4%inclusion2 decks27 decks
1%synergy
City of Traitors
7.4%inclusion2 decks27 decks
6%synergy
Mistrise Village
5.0%inclusion1 decks20 decks
2%synergy
Mana Artifacts
Arcane Signet
96%inclusion26 decks27 decks
8%synergy
Sol Ring
93%inclusion25 decks27 decks
3%synergy
Lotus Petal
74%inclusion20 decks27 decks
64%synergy
Talisman of Dominance
70%inclusion19 decks27 decks
21%synergy
Lion's Eye Diamond
67%inclusion18 decks27 decks
65%synergy
Fellwar Stone
63%inclusion17 decks27 decks
30%synergy
Mox Opal
63%inclusion17 decks27 decks
54%synergy
Talisman of Hierarchy
44%inclusion12 decks27 decks
1%synergy
Talisman of Progress
37%inclusion10 decks27 decks
-7%synergy
Grim Monolith
37%inclusion10 decks27 decks
34%synergy
Mox Amber
26%inclusion7 decks27 decks
20%synergy
The Soul Stone
17%inclusion2 decks12 decks
14%synergy
Dimir Signet
7.4%inclusion2 decks27 decks
-24%synergy
Azorius Signet
7.4%inclusion2 decks27 decks
-24%synergy
Basalt Monolith
7.4%inclusion2 decks27 decks
5%synergy
Lands
Command Tower
100%inclusion27 decks27 decks
7%synergy
Underground Sea
100%inclusion27 decks27 decks
84%synergy
Tundra
100%inclusion27 decks27 decks
84%synergy
Scrubland
100%inclusion27 decks27 decks
84%synergy
Watery Grave
100%inclusion27 decks27 decks
49%synergy
Marsh Flats
96%inclusion26 decks27 decks
60%synergy
Polluted Delta
93%inclusion25 decks27 decks
55%synergy
Hallowed Fountain
93%inclusion25 decks27 decks
43%synergy
Godless Shrine
93%inclusion25 decks27 decks
42%synergy
Flooded Strand
89%inclusion24 decks27 decks
51%synergy
Bloodstained Mire
81%inclusion22 decks27 decks
71%synergy
Undercity Sewers
78%inclusion21 decks27 decks
63%synergy
Verdant Catacombs
74%inclusion20 decks27 decks
64%synergy
Misty Rainforest
70%inclusion19 decks27 decks
59%synergy
Mana Confluence
70%inclusion19 decks27 decks
57%synergy
City of Brass
70%inclusion19 decks27 decks
55%synergy
Arid Mesa
67%inclusion18 decks27 decks
57%synergy
Gemstone Caverns
67%inclusion18 decks27 decks
59%synergy
Windswept Heath
63%inclusion17 decks27 decks
53%synergy
Morphic Pool
63%inclusion17 decks27 decks
29%synergy
Vault of Champions
59%inclusion16 decks27 decks
27%synergy
Scalding Tarn
56%inclusion15 decks27 decks
45%synergy
Sea of Clouds
56%inclusion15 decks27 decks
20%synergy
Exotic Orchard
52%inclusion14 decks27 decks
-7%synergy
Island
52%inclusion14 decks27 decks
-41%synergy
Shadowy Backstreet
44%inclusion12 decks27 decks
32%synergy
Swamp
44%inclusion12 decks27 decks
-47%synergy
Meticulous Archive
41%inclusion11 decks27 decks
27%synergy
Raffine's Tower
37%inclusion10 decks27 decks
-4%synergy
Plains
37%inclusion10 decks27 decks
-55%synergy
Forbidden Orchard
22%inclusion6 decks27 decks
20%synergy
Sink into Stupor
19%inclusion5 decks27 decks
6%synergy
Snow-Covered Swamp
15%inclusion4 decks27 decks
12%synergy
Bleachbone Verge
12%inclusion3 decks26 decks
3%synergy
Valgavoth's Lair
11%inclusion3 decks27 decks
8%synergy
Cavern of Souls
11%inclusion3 decks27 decks
4%synergy
Floodfarm Verge
11%inclusion3 decks27 decks
0%synergy
Caves of Koilos
11%inclusion3 decks27 decks
-24%synergy
Underground River
11%inclusion3 decks27 decks
-23%synergy
Snow-Covered Plains
11%inclusion3 decks27 decks
8%synergy
Spire of Industry
11%inclusion3 decks27 decks
3%synergy
Glacial Fortress
7.4%inclusion2 decks27 decks
-34%synergy
Snow-Covered Island
7.4%inclusion2 decks27 decks
4%synergy
Isolated Chapel
7.4%inclusion2 decks27 decks
-33%synergy
Brightclimb Pathway
7.4%inclusion2 decks27 decks
1%synergy
Reflecting Pool
7.4%inclusion2 decks27 decks
-1%synergy
Arcane Sanctum
7.4%inclusion2 decks27 decks
-47%synergy
Fabled Passage
7.4%inclusion2 decks27 decks
0%synergy
Adarkar Wastes
7.4%inclusion2 decks27 decks
-24%synergy
Gloomlake Verge
7.4%inclusion2 decks27 decks
-4%synergy
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