The Master of Keys (Commander) - Expensive Optimized

The Master of Keys
Rank #300
30decks
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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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Abdel Adrian, Gorion's Ward
90%inclusion27 decks30 decks
88%synergy
Animate Dead
93%inclusion28 decks30 decks
84%synergy
Entomb
90%inclusion27 decks30 decks
83%synergy
Necromancy
87%inclusion26 decks30 decks
82%synergy
Dress Down
83%inclusion25 decks30 decks
81%synergy
Dance of the Dead
77%inclusion23 decks30 decks
75%synergy
Mystic Remora
93%inclusion28 decks30 decks
73%synergy
Intuition
70%inclusion21 decks30 decks
68%synergy
Imperial Seal
73%inclusion22 decks30 decks
66%synergy
Tinybones Joins Up
67%inclusion20 decks30 decks
66%synergy
Top Cards
Esper Sentinel
90%inclusion27 decks30 decks
63%synergy
Dark Ritual
80%inclusion24 decks30 decks
60%synergy
The One Ring
77%inclusion23 decks30 decks
64%synergy
Force of Will
77%inclusion23 decks30 decks
64%synergy
Sevinne's Reclamation
73%inclusion22 decks30 decks
64%synergy
Blind Obedience
73%inclusion22 decks30 decks
61%synergy
Orcish Bowmasters
73%inclusion22 decks30 decks
63%synergy
Swords to Plowshares
70%inclusion21 decks30 decks
2%synergy
Ripples of Undeath
67%inclusion20 decks30 decks
64%synergy
Valley Floodcaller
67%inclusion20 decks30 decks
63%synergy
Game Changers
Vampiric Tutor
100%inclusion30 decks30 decks
83%synergy
Rhystic Study
97%inclusion29 decks30 decks
66%synergy
Enlightened Tutor
97%inclusion29 decks30 decks
78%synergy
Smothering Tithe
93%inclusion28 decks30 decks
63%synergy
Demonic Tutor
93%inclusion28 decks30 decks
73%synergy
Ancient Tomb
90%inclusion27 decks30 decks
77%synergy
Chrome Mox
90%inclusion27 decks30 decks
81%synergy
Mox Diamond
87%inclusion26 decks30 decks
80%synergy
Mana Vault
83%inclusion25 decks30 decks
75%synergy
Thassa's Oracle
77%inclusion23 decks30 decks
68%synergy
Creatures
Lotho, Corrupt Shirriff
63%inclusion19 decks30 decks
46%synergy
Grand Abolisher
60%inclusion18 decks30 decks
46%synergy
Wan Shi Tong, Librarian
60%inclusion6 decks10 decks
55%synergy
Ranger-Captain of Eos
53%inclusion16 decks30 decks
47%synergy
Displacer Kitten
47%inclusion14 decks30 decks
40%synergy
Opposition Agent
47%inclusion14 decks30 decks
38%synergy
Drannith Magistrate
47%inclusion14 decks30 decks
39%synergy
Auriok Salvagers
43%inclusion13 decks30 decks
43%synergy
Hullbreaker Horror
40%inclusion12 decks30 decks
34%synergy
Ledger Shredder
37%inclusion11 decks30 decks
28%synergy
Voice of Victory
35%inclusion8 decks23 decks
26%synergy
Lurrus of the Dream-Den
30%inclusion9 decks30 decks
29%synergy
Mockingbird
27%inclusion8 decks30 decks
22%synergy
Psychic Frog
27%inclusion8 decks30 decks
20%synergy
Archivist of Oghma
23%inclusion7 decks30 decks
17%synergy
Starfield Mystic
23%inclusion7 decks30 decks
17%synergy
Inquisitive Glimmer
23%inclusion7 decks30 decks
16%synergy
Victor, Valgavoth's Seneschal
23%inclusion7 decks30 decks
21%synergy
Talion, the Kindly Lord
23%inclusion7 decks30 decks
16%synergy
Scrabbling Skullcrab
20%inclusion6 decks30 decks
19%synergy
Phyrexian Metamorph
20%inclusion6 decks30 decks
12%synergy
Overlord of the Balemurk
20%inclusion6 decks30 decks
18%synergy
Entity Tracker
20%inclusion6 decks30 decks
14%synergy
Hedron Crab
17%inclusion5 decks30 decks
16%synergy
Mesa Enchantress
17%inclusion5 decks30 decks
8%synergy
Faerie Mastermind
17%inclusion5 decks30 decks
7%synergy
Hoarding Broodlord
13%inclusion4 decks30 decks
12%synergy
Pollywog Prodigy
13%inclusion4 decks30 decks
10%synergy
Heliod, the Radiant Dawn
13%inclusion4 decks30 decks
10%synergy
Ondu Spiritdancer
13%inclusion4 decks30 decks
7%synergy
Snapcaster Mage
10%inclusion3 decks30 decks
8%synergy
Gravebreaker Lamia
10%inclusion3 decks30 decks
9%synergy
Demon of Fate's Design
10%inclusion3 decks30 decks
5%synergy
Overlord of the Floodpits
10%inclusion3 decks30 decks
6%synergy
Fear of Impostors
10%inclusion3 decks30 decks
9%synergy
Leonin Relic-Warder
10%inclusion3 decks30 decks
10%synergy
Enduring Curiosity
10%inclusion3 decks30 decks
2%synergy
Zur, Eternal Schemer
10%inclusion3 decks30 decks
7%synergy
Zur the Enchanter
10%inclusion3 decks30 decks
5%synergy
Ghostly Pilferer
10%inclusion3 decks30 decks
3%synergy
Tataru Taru
10%inclusion2 decks20 decks
2%synergy
Moon-Blessed Cleric
10%inclusion3 decks30 decks
5%synergy
Spirited Companion
10%inclusion3 decks30 decks
8%synergy
Grim Guardian
10%inclusion3 decks30 decks
8%synergy
Volatile Stormdrake
6.7%inclusion2 decks30 decks
5%synergy
Sheoldred, the Apocalypse
6.7%inclusion2 decks30 decks
-2%synergy
Enduring Tenacity
6.7%inclusion2 decks30 decks
-1%synergy
Athreos, Shroud-Veiled
6.7%inclusion2 decks30 decks
2%synergy
Fear of Sleep Paralysis
6.7%inclusion2 decks30 decks
2%synergy
Tameshi, Reality Architect
6.7%inclusion2 decks30 decks
6%synergy
Instants
Fierce Guardianship
67%inclusion20 decks30 decks
46%synergy
Silence
63%inclusion19 decks30 decks
53%synergy
Pact of Negation
63%inclusion19 decks30 decks
56%synergy
Mental Misstep
60%inclusion18 decks30 decks
53%synergy
Flusterstorm
60%inclusion18 decks30 decks
52%synergy
Force of Negation
60%inclusion18 decks30 decks
48%synergy
Demonic Consultation
60%inclusion18 decks30 decks
52%synergy
Tainted Pact
57%inclusion17 decks30 decks
50%synergy
Mindbreak Trap
57%inclusion17 decks30 decks
50%synergy
Cyclonic Rift
57%inclusion17 decks30 decks
34%synergy
Borne Upon a Wind
57%inclusion17 decks30 decks
52%synergy
Mystical Tutor
53%inclusion16 decks30 decks
43%synergy
Cabal Ritual
50%inclusion15 decks30 decks
47%synergy
Swan Song
50%inclusion15 decks30 decks
30%synergy
Gifts Ungiven
40%inclusion12 decks30 decks
37%synergy
Mana Drain
40%inclusion12 decks30 decks
23%synergy
An Offer You Can't Refuse
37%inclusion11 decks30 decks
9%synergy
Into the Flood Maw
33%inclusion10 decks30 decks
30%synergy
Chain of Vapor
20%inclusion6 decks30 decks
17%synergy
Brain Freeze
20%inclusion6 decks30 decks
19%synergy
Sink into Stupor
20%inclusion6 decks30 decks
7%synergy
Retraction Helix
17%inclusion5 decks30 decks
16%synergy
Path to Exile
17%inclusion5 decks30 decks
-26%synergy
Teferi's Protection
13%inclusion4 decks30 decks
-3%synergy
Banishing Knack
13%inclusion4 decks30 decks
13%synergy
Counterspell
13%inclusion4 decks30 decks
-28%synergy
Saw in Half
13%inclusion4 decks30 decks
11%synergy
Sacrifice
10%inclusion3 decks30 decks
9%synergy
Orim's Chant
10%inclusion3 decks30 decks
8%synergy
Deadly Rollick
6.7%inclusion2 decks30 decks
-9%synergy
Fell the Profane
6.7%inclusion2 decks30 decks
-2%synergy
Brainstorm
6.7%inclusion2 decks30 decks
-10%synergy
Lim-Dûl's Vault
6.7%inclusion2 decks30 decks
4%synergy
Snuff Out
6.7%inclusion2 decks30 decks
-3%synergy
Culling the Weak
6.7%inclusion2 decks30 decks
5%synergy
Darkblast
6.7%inclusion2 decks30 decks
7%synergy
Void Rend
6.7%inclusion2 decks30 decks
-28%synergy
Ad Nauseam
6.7%inclusion2 decks30 decks
4%synergy
Sorceries
Reanimate
30%inclusion9 decks30 decks
14%synergy
Toxic Deluge
30%inclusion9 decks30 decks
10%synergy
Beseech the Mirror
27%inclusion8 decks30 decks
23%synergy
Cabal Therapy
23%inclusion7 decks30 decks
23%synergy
Lively Dirge
23%inclusion7 decks30 decks
22%synergy
Replenish
20%inclusion6 decks30 decks
18%synergy
Windfall
17%inclusion5 decks30 decks
3%synergy
Mnemonic Betrayal
17%inclusion5 decks30 decks
14%synergy
Idyllic Tutor
10%inclusion3 decks30 decks
6%synergy
Demonic Counsel
10%inclusion3 decks30 decks
9%synergy
Damn
6.7%inclusion2 decks30 decks
-14%synergy
Redress Fate
6.7%inclusion2 decks30 decks
1%synergy
Grim Tutor
6.7%inclusion2 decks30 decks
2%synergy
Utility Artifacts
Wishclaw Talisman
53%inclusion16 decks30 decks
46%synergy
Mesmeric Orb
17%inclusion5 decks30 decks
16%synergy
Vexing Bauble
13%inclusion4 decks30 decks
12%synergy
Sensei's Divining Top
10%inclusion3 decks30 decks
0%synergy
Whip of Erebos
6.7%inclusion2 decks30 decks
4%synergy
Codex Shredder
6.7%inclusion2 decks30 decks
6%synergy
Altar of the Brood
6.7%inclusion2 decks30 decks
5%synergy
Enchantments
Necropotence
60%inclusion18 decks30 decks
53%synergy
Amphibian Downpour
53%inclusion16 decks30 decks
49%synergy
Copy Artifact
40%inclusion12 decks30 decks
39%synergy
The Meathook Massacre
33%inclusion10 decks30 decks
30%synergy
Steal Enchantment
30%inclusion9 decks30 decks
29%synergy
Chthonian Nightmare
27%inclusion8 decks30 decks
26%synergy
Trouble in Pairs
27%inclusion8 decks30 decks
21%synergy
Static Prison
23%inclusion7 decks30 decks
23%synergy
Counterbalance
20%inclusion6 decks30 decks
18%synergy
Founding the Third Path
20%inclusion6 decks30 decks
20%synergy
Mirrormade
20%inclusion6 decks30 decks
10%synergy
Touch the Spirit Realm
20%inclusion6 decks30 decks
18%synergy
Bloodchief Ascension
17%inclusion5 decks30 decks
11%synergy
Chains of Mephistopheles
17%inclusion5 decks30 decks
16%synergy
Starfield of Nyx
17%inclusion5 decks30 decks
13%synergy
Stillness in Motion
14%inclusion3 decks21 decks
14%synergy
Darksteel Mutation
13%inclusion4 decks30 decks
7%synergy
Sphere of Safety
13%inclusion4 decks30 decks
4%synergy
Cemetery Tampering
13%inclusion4 decks30 decks
13%synergy
Land Tax
13%inclusion4 decks30 decks
7%synergy
Estrid's Invocation
10%inclusion3 decks30 decks
5%synergy
Copy Enchantment
10%inclusion3 decks30 decks
5%synergy
Leyline of Anticipation
10%inclusion3 decks30 decks
6%synergy
Ghostly Prison
10%inclusion3 decks30 decks
-12%synergy
Propaganda
10%inclusion3 decks30 decks
-18%synergy
Enchanted Evening
10%inclusion3 decks30 decks
8%synergy
Secret Arcade // Dusty Parlor
10%inclusion3 decks30 decks
5%synergy
Teval's Judgment
9.1%inclusion2 decks22 decks
8%synergy
The Cruelty of Gix
6.7%inclusion2 decks30 decks
6%synergy
Extravagant Replication
6.7%inclusion2 decks30 decks
2%synergy
Sigil of the Empty Throne
6.7%inclusion2 decks30 decks
1%synergy
Out of the Tombs
6.7%inclusion2 decks30 decks
6%synergy
Shark Typhoon
6.7%inclusion2 decks30 decks
1%synergy
Exquisite Blood
6.7%inclusion2 decks30 decks
0%synergy
Authority of the Consuls
6.7%inclusion2 decks30 decks
-6%synergy
Seal of Cleansing
6.7%inclusion2 decks30 decks
5%synergy
Monologue Tax
6.7%inclusion2 decks30 decks
0%synergy
Mind Over Matter
6.7%inclusion2 decks30 decks
6%synergy
Phyrexian Unlife
6.7%inclusion2 decks30 decks
5%synergy
Sheltered by Ghosts
6.7%inclusion2 decks30 decks
4%synergy
Dovescape
6.7%inclusion2 decks30 decks
6%synergy
Greater Auramancy
6.7%inclusion2 decks30 decks
2%synergy
Aura of Silence
6.7%inclusion2 decks30 decks
3%synergy
Black Market Connections
6.7%inclusion2 decks30 decks
-8%synergy
Hallowed Haunting
6.7%inclusion2 decks30 decks
4%synergy
Solemnity
6.7%inclusion2 decks30 decks
3%synergy
Planeswalkers
Teferi, Time Raveler
43%inclusion13 decks30 decks
35%synergy
Tezzeret, Cruel Captain
6.3%inclusion1 decks16 decks
4%synergy
Utility Lands
Otawara, Soaring City
77%inclusion23 decks30 decks
58%synergy
Urza's Saga
43%inclusion13 decks30 decks
32%synergy
Hall of Heliod's Generosity
30%inclusion9 decks30 decks
17%synergy
Serra's Sanctum
30%inclusion9 decks30 decks
28%synergy
Takenuma, Abandoned Mire
27%inclusion8 decks30 decks
20%synergy
Emergence Zone
27%inclusion8 decks30 decks
25%synergy
Minamo, School at Water's Edge
20%inclusion6 decks30 decks
16%synergy
Cephalid Coliseum
17%inclusion5 decks30 decks
13%synergy
Urborg, Tomb of Yawgmoth
10%inclusion3 decks30 decks
-3%synergy
City of Traitors
10%inclusion3 decks30 decks
9%synergy
Uthros, Titanic Godcore
7.1%inclusion1 decks14 decks
4%synergy
Phyrexian Tower
6.7%inclusion2 decks30 decks
3%synergy
Academy Ruins
6.7%inclusion2 decks30 decks
0%synergy
Reliquary Tower
6.7%inclusion2 decks30 decks
-27%synergy
Mana Artifacts
Arcane Signet
97%inclusion29 decks30 decks
9%synergy
Sol Ring
93%inclusion28 decks30 decks
4%synergy
Lotus Petal
73%inclusion22 decks30 decks
63%synergy
Talisman of Dominance
63%inclusion19 decks30 decks
14%synergy
Fellwar Stone
63%inclusion19 decks30 decks
30%synergy
Lion's Eye Diamond
60%inclusion18 decks30 decks
58%synergy
Mox Opal
53%inclusion16 decks30 decks
45%synergy
Talisman of Hierarchy
40%inclusion12 decks30 decks
-4%synergy
Talisman of Progress
37%inclusion11 decks30 decks
-7%synergy
Grim Monolith
30%inclusion9 decks30 decks
27%synergy
Mox Amber
20%inclusion6 decks30 decks
14%synergy
The Soul Stone
14%inclusion2 decks14 decks
12%synergy
Basalt Monolith
6.7%inclusion2 decks30 decks
4%synergy
Dimir Signet
6.7%inclusion2 decks30 decks
-24%synergy
Azorius Signet
6.7%inclusion2 decks30 decks
-24%synergy
Lands
Tundra
100%inclusion30 decks30 decks
84%synergy
Command Tower
100%inclusion30 decks30 decks
7%synergy
Underground Sea
100%inclusion30 decks30 decks
84%synergy
Scrubland
100%inclusion30 decks30 decks
84%synergy
Watery Grave
97%inclusion29 decks30 decks
46%synergy
Marsh Flats
93%inclusion28 decks30 decks
57%synergy
Godless Shrine
90%inclusion27 decks30 decks
39%synergy
Polluted Delta
90%inclusion27 decks30 decks
52%synergy
Hallowed Fountain
90%inclusion27 decks30 decks
39%synergy
Flooded Strand
87%inclusion26 decks30 decks
48%synergy
Bloodstained Mire
80%inclusion24 decks30 decks
69%synergy
Undercity Sewers
73%inclusion22 decks30 decks
59%synergy
Verdant Catacombs
73%inclusion22 decks30 decks
64%synergy
Misty Rainforest
70%inclusion21 decks30 decks
59%synergy
Mana Confluence
70%inclusion21 decks30 decks
56%synergy
City of Brass
70%inclusion21 decks30 decks
55%synergy
Gemstone Caverns
67%inclusion20 decks30 decks
59%synergy
Arid Mesa
67%inclusion20 decks30 decks
57%synergy
Windswept Heath
63%inclusion19 decks30 decks
54%synergy
Morphic Pool
63%inclusion19 decks30 decks
30%synergy
Scalding Tarn
57%inclusion17 decks30 decks
46%synergy
Vault of Champions
57%inclusion17 decks30 decks
24%synergy
Sea of Clouds
53%inclusion16 decks30 decks
18%synergy
Exotic Orchard
50%inclusion15 decks30 decks
-9%synergy
Island
47%inclusion14 decks30 decks
-46%synergy
Shadowy Backstreet
43%inclusion13 decks30 decks
31%synergy
Meticulous Archive
43%inclusion13 decks30 decks
29%synergy
Swamp
37%inclusion11 decks30 decks
-55%synergy
Raffine's Tower
37%inclusion11 decks30 decks
-4%synergy
Plains
33%inclusion10 decks30 decks
-59%synergy
Forbidden Orchard
23%inclusion7 decks30 decks
21%synergy
Sink into Stupor
20%inclusion6 decks30 decks
7%synergy
Cavern of Souls
17%inclusion5 decks30 decks
10%synergy
Snow-Covered Swamp
17%inclusion5 decks30 decks
14%synergy
Starting Town
15%inclusion3 decks20 decks
11%synergy
Caves of Koilos
13%inclusion4 decks30 decks
-22%synergy
Snow-Covered Plains
13%inclusion4 decks30 decks
11%synergy
Valgavoth's Lair
13%inclusion4 decks30 decks
11%synergy
Floodfarm Verge
13%inclusion4 decks30 decks
2%synergy
Underground River
13%inclusion4 decks30 decks
-21%synergy
Bleachbone Verge
10%inclusion3 decks29 decks
2%synergy
Glacial Fortress
10%inclusion3 decks30 decks
-32%synergy
Spire of Industry
10%inclusion3 decks30 decks
2%synergy
Snow-Covered Island
10%inclusion3 decks30 decks
7%synergy
Arcane Sanctum
10%inclusion3 decks30 decks
-44%synergy
Isolated Chapel
10%inclusion3 decks30 decks
-31%synergy
Adarkar Wastes
10%inclusion3 decks30 decks
-22%synergy
Fell the Profane
6.7%inclusion2 decks30 decks
-2%synergy
Fabled Passage
6.7%inclusion2 decks30 decks
-1%synergy
Brightclimb Pathway
6.7%inclusion2 decks30 decks
0%synergy
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