The Master of Keys (Commander) - Expensive Optimized

The Master of Keys
Rank #304
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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
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Abdel Adrian, Gorion's Ward
89%inclusion25 decks28 decks
88%synergy
Necromancy
89%inclusion25 decks28 decks
85%synergy
Animate Dead
93%inclusion26 decks28 decks
83%synergy
Entomb
89%inclusion25 decks28 decks
82%synergy
Dress Down
82%inclusion23 decks28 decks
80%synergy
Dance of the Dead
79%inclusion22 decks28 decks
76%synergy
Mystic Remora
93%inclusion26 decks28 decks
72%synergy
Tinybones Joins Up
71%inclusion20 decks28 decks
70%synergy
Intuition
71%inclusion20 decks28 decks
70%synergy
Valley Floodcaller
71%inclusion20 decks28 decks
67%synergy
Top Cards
Esper Sentinel
89%inclusion25 decks28 decks
62%synergy
Dark Ritual
82%inclusion23 decks28 decks
63%synergy
Blind Obedience
75%inclusion21 decks28 decks
63%synergy
Thassa's Oracle
75%inclusion21 decks28 decks
66%synergy
Force of Will
75%inclusion21 decks28 decks
63%synergy
Orcish Bowmasters
75%inclusion21 decks28 decks
64%synergy
Swords to Plowshares
71%inclusion20 decks28 decks
3%synergy
Sevinne's Reclamation
68%inclusion19 decks28 decks
59%synergy
Imperial Seal
68%inclusion19 decks28 decks
61%synergy
Fierce Guardianship
68%inclusion19 decks28 decks
47%synergy
Game Changers
Vampiric Tutor
100%inclusion28 decks28 decks
83%synergy
Rhystic Study
96%inclusion27 decks28 decks
65%synergy
Enlightened Tutor
96%inclusion27 decks28 decks
77%synergy
Smothering Tithe
93%inclusion26 decks28 decks
62%synergy
Demonic Tutor
93%inclusion26 decks28 decks
72%synergy
Ancient Tomb
89%inclusion25 decks28 decks
76%synergy
Chrome Mox
89%inclusion25 decks28 decks
80%synergy
Mox Diamond
86%inclusion24 decks28 decks
79%synergy
Mana Vault
86%inclusion24 decks28 decks
77%synergy
The One Ring
79%inclusion22 decks28 decks
65%synergy
Creatures
Lotho, Corrupt Shirriff
64%inclusion18 decks28 decks
47%synergy
Grand Abolisher
57%inclusion16 decks28 decks
43%synergy
Opposition Agent
50%inclusion14 decks28 decks
42%synergy
Ranger-Captain of Eos
50%inclusion14 decks28 decks
44%synergy
Wan Shi Tong, Librarian
44%inclusion4 decks9 decks
39%synergy
Displacer Kitten
43%inclusion12 decks28 decks
36%synergy
Drannith Magistrate
43%inclusion12 decks28 decks
35%synergy
Auriok Salvagers
43%inclusion12 decks28 decks
43%synergy
Hullbreaker Horror
39%inclusion11 decks28 decks
33%synergy
Ledger Shredder
39%inclusion11 decks28 decks
31%synergy
Lurrus of the Dream-Den
32%inclusion9 decks28 decks
31%synergy
Voice of Victory
29%inclusion6 decks21 decks
20%synergy
Psychic Frog
29%inclusion8 decks28 decks
22%synergy
Archivist of Oghma
29%inclusion8 decks28 decks
22%synergy
Mockingbird
25%inclusion7 decks28 decks
21%synergy
Talion, the Kindly Lord
25%inclusion7 decks28 decks
17%synergy
Inquisitive Glimmer
21%inclusion6 decks28 decks
14%synergy
Starfield Mystic
21%inclusion6 decks28 decks
15%synergy
Victor, Valgavoth's Seneschal
21%inclusion6 decks28 decks
19%synergy
Phyrexian Metamorph
18%inclusion5 decks28 decks
9%synergy
Overlord of the Balemurk
18%inclusion5 decks28 decks
16%synergy
Entity Tracker
18%inclusion5 decks28 decks
12%synergy
Hedron Crab
18%inclusion5 decks28 decks
17%synergy
Pollywog Prodigy
14%inclusion4 decks28 decks
10%synergy
Scrabbling Skullcrab
14%inclusion4 decks28 decks
13%synergy
Hoarding Broodlord
14%inclusion4 decks28 decks
12%synergy
Mesa Enchantress
14%inclusion4 decks28 decks
5%synergy
Heliod, the Radiant Dawn
14%inclusion4 decks28 decks
11%synergy
Fear of Impostors
11%inclusion3 decks28 decks
9%synergy
Faerie Mastermind
11%inclusion3 decks28 decks
1%synergy
Grim Guardian
11%inclusion3 decks28 decks
8%synergy
Ondu Spiritdancer
11%inclusion3 decks28 decks
4%synergy
Snapcaster Mage
11%inclusion3 decks28 decks
9%synergy
Leonin Relic-Warder
11%inclusion3 decks28 decks
10%synergy
Tataru Taru
11%inclusion2 decks19 decks
2%synergy
Volatile Stormdrake
7.1%inclusion2 decks28 decks
6%synergy
Demon of Fate's Design
7.1%inclusion2 decks28 decks
2%synergy
Enduring Tenacity
7.1%inclusion2 decks28 decks
0%synergy
Enduring Curiosity
7.1%inclusion2 decks28 decks
-1%synergy
Aura Thief
7.1%inclusion2 decks28 decks
6%synergy
Gravebreaker Lamia
7.1%inclusion2 decks28 decks
6%synergy
Sheoldred, the Apocalypse
7.1%inclusion2 decks28 decks
-2%synergy
Spirited Companion
7.1%inclusion2 decks28 decks
5%synergy
Zur, Eternal Schemer
7.1%inclusion2 decks28 decks
4%synergy
Emry, Lurker of the Loch
7.1%inclusion2 decks28 decks
2%synergy
Overlord of the Floodpits
7.1%inclusion2 decks28 decks
4%synergy
Moon-Blessed Cleric
7.1%inclusion2 decks28 decks
2%synergy
Tameshi, Reality Architect
7.1%inclusion2 decks28 decks
6%synergy
Zur the Enchanter
7.1%inclusion2 decks28 decks
2%synergy
Dauthi Voidwalker
7.1%inclusion2 decks28 decks
1%synergy
Instants
Silence
64%inclusion18 decks28 decks
54%synergy
Pact of Negation
64%inclusion18 decks28 decks
57%synergy
Mental Misstep
61%inclusion17 decks28 decks
54%synergy
Demonic Consultation
61%inclusion17 decks28 decks
53%synergy
Force of Negation
61%inclusion17 decks28 decks
49%synergy
Flusterstorm
61%inclusion17 decks28 decks
53%synergy
Tainted Pact
57%inclusion16 decks28 decks
50%synergy
Mindbreak Trap
57%inclusion16 decks28 decks
50%synergy
Cyclonic Rift
57%inclusion16 decks28 decks
34%synergy
Cabal Ritual
54%inclusion15 decks28 decks
50%synergy
Borne Upon a Wind
54%inclusion15 decks28 decks
49%synergy
Swan Song
50%inclusion14 decks28 decks
30%synergy
Mystical Tutor
50%inclusion14 decks28 decks
39%synergy
Mana Drain
43%inclusion12 decks28 decks
26%synergy
Gifts Ungiven
39%inclusion11 decks28 decks
37%synergy
An Offer You Can't Refuse
36%inclusion10 decks28 decks
9%synergy
Into the Flood Maw
32%inclusion9 decks28 decks
28%synergy
Chain of Vapor
21%inclusion6 decks28 decks
18%synergy
Sink into Stupor
21%inclusion6 decks28 decks
9%synergy
Retraction Helix
18%inclusion5 decks28 decks
17%synergy
Brain Freeze
18%inclusion5 decks28 decks
17%synergy
Path to Exile
18%inclusion5 decks28 decks
-24%synergy
Banishing Knack
14%inclusion4 decks28 decks
14%synergy
Saw in Half
14%inclusion4 decks28 decks
12%synergy
Sacrifice
11%inclusion3 decks28 decks
10%synergy
Culling the Weak
11%inclusion3 decks28 decks
9%synergy
Ad Nauseam
11%inclusion3 decks28 decks
8%synergy
Counterspell
11%inclusion3 decks28 decks
-31%synergy
Teferi's Protection
11%inclusion3 decks28 decks
-6%synergy
Snuff Out
7.1%inclusion2 decks28 decks
-2%synergy
Brainstorm
7.1%inclusion2 decks28 decks
-10%synergy
Deadly Rollick
7.1%inclusion2 decks28 decks
-8%synergy
Fell the Profane
7.1%inclusion2 decks28 decks
-2%synergy
Muddle the Mixture
7.1%inclusion2 decks28 decks
3%synergy
Void Rend
7.1%inclusion2 decks28 decks
-27%synergy
Sorceries
Toxic Deluge
32%inclusion9 decks28 decks
13%synergy
Beseech the Mirror
32%inclusion9 decks28 decks
28%synergy
Reanimate
25%inclusion7 decks28 decks
9%synergy
Replenish
21%inclusion6 decks28 decks
20%synergy
Lively Dirge
21%inclusion6 decks28 decks
20%synergy
Cabal Therapy
18%inclusion5 decks28 decks
18%synergy
Windfall
18%inclusion5 decks28 decks
4%synergy
Mnemonic Betrayal
14%inclusion4 decks28 decks
11%synergy
Demonic Counsel
14%inclusion4 decks28 decks
13%synergy
Idyllic Tutor
11%inclusion3 decks28 decks
6%synergy
Damn
7.1%inclusion2 decks28 decks
-13%synergy
Grim Tutor
7.1%inclusion2 decks28 decks
3%synergy
Redress Fate
7.1%inclusion2 decks28 decks
1%synergy
Utility Artifacts
Wishclaw Talisman
54%inclusion15 decks28 decks
46%synergy
Mesmeric Orb
18%inclusion5 decks28 decks
17%synergy
Vexing Bauble
14%inclusion4 decks28 decks
12%synergy
Sensei's Divining Top
11%inclusion3 decks28 decks
1%synergy
Altar of the Brood
7.1%inclusion2 decks28 decks
6%synergy
Codex Shredder
7.1%inclusion2 decks28 decks
7%synergy
Cursed Totem
7.1%inclusion2 decks28 decks
5%synergy
Whip of Erebos
7.1%inclusion2 decks28 decks
5%synergy
Enchantments
Ripples of Undeath
64%inclusion18 decks28 decks
62%synergy
Necropotence
61%inclusion17 decks28 decks
54%synergy
Amphibian Downpour
54%inclusion15 decks28 decks
49%synergy
Copy Artifact
39%inclusion11 decks28 decks
38%synergy
The Meathook Massacre
36%inclusion10 decks28 decks
32%synergy
Steal Enchantment
29%inclusion8 decks28 decks
28%synergy
Chthonian Nightmare
29%inclusion8 decks28 decks
28%synergy
Trouble in Pairs
25%inclusion7 decks28 decks
20%synergy
Static Prison
25%inclusion7 decks28 decks
25%synergy
Touch the Spirit Realm
21%inclusion6 decks28 decks
19%synergy
Counterbalance
21%inclusion6 decks28 decks
20%synergy
Founding the Third Path
18%inclusion5 decks28 decks
18%synergy
Starfield of Nyx
18%inclusion5 decks28 decks
14%synergy
Chains of Mephistopheles
18%inclusion5 decks28 decks
18%synergy
Bloodchief Ascension
18%inclusion5 decks28 decks
12%synergy
Stillness in Motion
15%inclusion3 decks20 decks
15%synergy
Cemetery Tampering
14%inclusion4 decks28 decks
14%synergy
Land Tax
14%inclusion4 decks28 decks
8%synergy
Darksteel Mutation
14%inclusion4 decks28 decks
8%synergy
Mirrormade
14%inclusion4 decks28 decks
5%synergy
Sphere of Safety
11%inclusion3 decks28 decks
1%synergy
Secret Arcade // Dusty Parlor
11%inclusion3 decks28 decks
6%synergy
Estrid's Invocation
11%inclusion3 decks28 decks
6%synergy
Enchanted Evening
11%inclusion3 decks28 decks
9%synergy
Leyline of Anticipation
11%inclusion3 decks28 decks
6%synergy
Ghostly Prison
11%inclusion3 decks28 decks
-11%synergy
Teval's Judgment
10%inclusion2 decks21 decks
9%synergy
Shark Typhoon
7.1%inclusion2 decks28 decks
1%synergy
Seal of Cleansing
7.1%inclusion2 decks28 decks
6%synergy
Monologue Tax
7.1%inclusion2 decks28 decks
1%synergy
Black Market Connections
7.1%inclusion2 decks28 decks
-7%synergy
Hallowed Haunting
7.1%inclusion2 decks28 decks
5%synergy
Greater Auramancy
7.1%inclusion2 decks28 decks
3%synergy
Solemnity
7.1%inclusion2 decks28 decks
4%synergy
Out of the Tombs
7.1%inclusion2 decks28 decks
7%synergy
Authority of the Consuls
7.1%inclusion2 decks28 decks
-5%synergy
Sheltered by Ghosts
7.1%inclusion2 decks28 decks
5%synergy
Aura of Silence
7.1%inclusion2 decks28 decks
4%synergy
Propaganda
7.1%inclusion2 decks28 decks
-21%synergy
The Cruelty of Gix
7.1%inclusion2 decks28 decks
7%synergy
Mind Over Matter
7.1%inclusion2 decks28 decks
7%synergy
Phyrexian Unlife
7.1%inclusion2 decks28 decks
5%synergy
Exquisite Blood
7.1%inclusion2 decks28 decks
1%synergy
Dovescape
7.1%inclusion2 decks28 decks
7%synergy
Planeswalkers
Teferi, Time Raveler
46%inclusion13 decks28 decks
38%synergy
Tezzeret, Cruel Captain
6.7%inclusion1 decks15 decks
5%synergy
Utility Lands
Otawara, Soaring City
79%inclusion22 decks28 decks
59%synergy
Urza's Saga
43%inclusion12 decks28 decks
31%synergy
Serra's Sanctum
32%inclusion9 decks28 decks
30%synergy
Takenuma, Abandoned Mire
29%inclusion8 decks28 decks
22%synergy
Hall of Heliod's Generosity
25%inclusion7 decks28 decks
12%synergy
Emergence Zone
25%inclusion7 decks28 decks
23%synergy
Minamo, School at Water's Edge
18%inclusion5 decks28 decks
14%synergy
Cephalid Coliseum
14%inclusion4 decks28 decks
11%synergy
Urborg, Tomb of Yawgmoth
11%inclusion3 decks28 decks
-2%synergy
Uthros, Titanic Godcore
7.7%inclusion1 decks13 decks
4%synergy
Academy Ruins
7.1%inclusion2 decks28 decks
0%synergy
City of Traitors
7.1%inclusion2 decks28 decks
6%synergy
Reliquary Tower
7.1%inclusion2 decks28 decks
-27%synergy
Mana Artifacts
Arcane Signet
96%inclusion27 decks28 decks
9%synergy
Sol Ring
93%inclusion26 decks28 decks
3%synergy
Lotus Petal
75%inclusion21 decks28 decks
65%synergy
Talisman of Dominance
68%inclusion19 decks28 decks
18%synergy
Fellwar Stone
64%inclusion18 decks28 decks
31%synergy
Lion's Eye Diamond
64%inclusion18 decks28 decks
62%synergy
Mox Opal
61%inclusion17 decks28 decks
52%synergy
Talisman of Hierarchy
43%inclusion12 decks28 decks
-1%synergy
Grim Monolith
36%inclusion10 decks28 decks
32%synergy
Talisman of Progress
36%inclusion10 decks28 decks
-8%synergy
Mox Amber
25%inclusion7 decks28 decks
19%synergy
The Soul Stone
15%inclusion2 decks13 decks
13%synergy
Dimir Signet
7.1%inclusion2 decks28 decks
-24%synergy
Basalt Monolith
7.1%inclusion2 decks28 decks
5%synergy
Azorius Signet
7.1%inclusion2 decks28 decks
-24%synergy
Lands
Underground Sea
100%inclusion28 decks28 decks
84%synergy
Scrubland
100%inclusion28 decks28 decks
84%synergy
Watery Grave
100%inclusion28 decks28 decks
49%synergy
Tundra
100%inclusion28 decks28 decks
84%synergy
Command Tower
100%inclusion28 decks28 decks
7%synergy
Marsh Flats
96%inclusion27 decks28 decks
60%synergy
Polluted Delta
93%inclusion26 decks28 decks
55%synergy
Godless Shrine
93%inclusion26 decks28 decks
42%synergy
Hallowed Fountain
93%inclusion26 decks28 decks
43%synergy
Flooded Strand
89%inclusion25 decks28 decks
51%synergy
Bloodstained Mire
82%inclusion23 decks28 decks
71%synergy
Undercity Sewers
75%inclusion21 decks28 decks
61%synergy
Verdant Catacombs
75%inclusion21 decks28 decks
65%synergy
Misty Rainforest
71%inclusion20 decks28 decks
61%synergy
Mana Confluence
68%inclusion19 decks28 decks
54%synergy
City of Brass
68%inclusion19 decks28 decks
53%synergy
Arid Mesa
68%inclusion19 decks28 decks
58%synergy
Windswept Heath
64%inclusion18 decks28 decks
55%synergy
Gemstone Caverns
64%inclusion18 decks28 decks
57%synergy
Morphic Pool
61%inclusion17 decks28 decks
27%synergy
Scalding Tarn
57%inclusion16 decks28 decks
46%synergy
Vault of Champions
57%inclusion16 decks28 decks
25%synergy
Exotic Orchard
54%inclusion15 decks28 decks
-5%synergy
Sea of Clouds
54%inclusion15 decks28 decks
18%synergy
Island
50%inclusion14 decks28 decks
-43%synergy
Shadowy Backstreet
43%inclusion12 decks28 decks
30%synergy
Swamp
43%inclusion12 decks28 decks
-49%synergy
Meticulous Archive
39%inclusion11 decks28 decks
25%synergy
Plains
36%inclusion10 decks28 decks
-56%synergy
Raffine's Tower
36%inclusion10 decks28 decks
-5%synergy
Forbidden Orchard
25%inclusion7 decks28 decks
23%synergy
Sink into Stupor
21%inclusion6 decks28 decks
9%synergy
Snow-Covered Swamp
18%inclusion5 decks28 decks
15%synergy
Snow-Covered Plains
14%inclusion4 decks28 decks
11%synergy
Bleachbone Verge
11%inclusion3 decks27 decks
3%synergy
Caves of Koilos
11%inclusion3 decks28 decks
-25%synergy
Underground River
11%inclusion3 decks28 decks
-23%synergy
Cavern of Souls
11%inclusion3 decks28 decks
4%synergy
Floodfarm Verge
11%inclusion3 decks28 decks
0%synergy
Snow-Covered Island
11%inclusion3 decks28 decks
8%synergy
Spire of Industry
11%inclusion3 decks28 decks
3%synergy
Valgavoth's Lair
11%inclusion3 decks28 decks
8%synergy
Fell the Profane
7.1%inclusion2 decks28 decks
-2%synergy
Fabled Passage
7.1%inclusion2 decks28 decks
0%synergy
Brightclimb Pathway
7.1%inclusion2 decks28 decks
1%synergy
Arcane Sanctum
7.1%inclusion2 decks28 decks
-47%synergy
Isolated Chapel
7.1%inclusion2 decks28 decks
-33%synergy
Adarkar Wastes
7.1%inclusion2 decks28 decks
-24%synergy
Gloomlake Verge
7.1%inclusion2 decks28 decks
-4%synergy
Glacial Fortress
7.1%inclusion2 decks28 decks
-35%synergy
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