The Master of Keys (Commander) - Control

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
Battles
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Mana Artifacts
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Wan Shi Tong, Librarian
11%inclusion6 decks54 decks
6%synergy
Aang's Iceberg
2.6%inclusion2 decks78 decks
2%synergy
The Rise of Sozin
2.6%inclusion2 decks78 decks
2%synergy
North Pole Gates
1.9%inclusion1 decks53 decks
2%synergy
Bender's Waterskin
1.3%inclusion1 decks78 decks
-2%synergy
High Synergy Cards
Ripples of Undeath
72%inclusion125 decks173 decks
70%synergy
Dress Down
69%inclusion120 decks173 decks
67%synergy
Animate Dead
76%inclusion132 decks173 decks
67%synergy
Necromancy
67%inclusion116 decks173 decks
62%synergy
Mystic Remora
73%inclusion126 decks173 decks
52%synergy
Amphibian Downpour
54%inclusion94 decks173 decks
50%synergy
Entity Tracker
54%inclusion93 decks173 decks
47%synergy
Dance of the Dead
49%inclusion84 decks173 decks
46%synergy
Sevinne's Reclamation
53%inclusion91 decks173 decks
44%synergy
Inquisitive Glimmer
51%inclusion88 decks173 decks
43%synergy
Top Cards
Swords to Plowshares
62%inclusion108 decks173 decks
-6%synergy
Blind Obedience
53%inclusion91 decks173 decks
40%synergy
Entomb
49%inclusion85 decks173 decks
42%synergy
Mesa Enchantress
45%inclusion78 decks173 decks
36%synergy
An Offer You Can't Refuse
45%inclusion77 decks173 decks
18%synergy
Dark Ritual
45%inclusion77 decks173 decks
25%synergy
Starfield Mystic
43%inclusion75 decks173 decks
37%synergy
Swan Song
43%inclusion75 decks173 decks
24%synergy
Abdel Adrian, Gorion's Ward
43%inclusion75 decks173 decks
42%synergy
Seal of Cleansing
42%inclusion73 decks173 decks
41%synergy
Game Changers
Smothering Tithe
63%inclusion109 decks173 decks
31%synergy
Rhystic Study
58%inclusion101 decks173 decks
26%synergy
Enlightened Tutor
43%inclusion75 decks173 decks
23%synergy
Demonic Tutor
39%inclusion68 decks173 decks
18%synergy
Ancient Tomb
34%inclusion59 decks173 decks
21%synergy
Force of Will
34%inclusion59 decks173 decks
21%synergy
Vampiric Tutor
33%inclusion57 decks173 decks
15%synergy
Thassa's Oracle
32%inclusion56 decks173 decks
23%synergy
Fierce Guardianship
32%inclusion56 decks173 decks
12%synergy
Cyclonic Rift
31%inclusion54 decks173 decks
7%synergy
Creatures
Demon of Fate's Design
40%inclusion70 decks173 decks
35%synergy
Gravebreaker Lamia
40%inclusion69 decks173 decks
39%synergy
Esper Sentinel
39%inclusion68 decks173 decks
12%synergy
Scrabbling Skullcrab
39%inclusion67 decks173 decks
38%synergy
Fear of Impostors
35%inclusion61 decks173 decks
34%synergy
Overlord of the Balemurk
35%inclusion61 decks173 decks
33%synergy
Lotho, Corrupt Shirriff
35%inclusion61 decks173 decks
18%synergy
Fear of Sleep Paralysis
33%inclusion57 decks173 decks
27%synergy
Overlord of the Floodpits
31%inclusion54 decks173 decks
27%synergy
Doomwake Giant
31%inclusion54 decks173 decks
25%synergy
Grand Abolisher
31%inclusion54 decks173 decks
17%synergy
Valley Floodcaller
31%inclusion53 decks173 decks
26%synergy
Zur, Eternal Schemer
30%inclusion52 decks173 decks
27%synergy
Orcish Bowmasters
29%inclusion51 decks173 decks
18%synergy
Victor, Valgavoth's Seneschal
28%inclusion49 decks173 decks
26%synergy
Ondu Spiritdancer
28%inclusion48 decks173 decks
21%synergy
Hullbreaker Horror
25%inclusion44 decks173 decks
19%synergy
Heliod, the Radiant Dawn
24%inclusion41 decks173 decks
20%synergy
Ledger Shredder
24%inclusion41 decks173 decks
15%synergy
Zur the Enchanter
23%inclusion39 decks173 decks
17%synergy
Ranger-Captain of Eos
21%inclusion37 decks173 decks
15%synergy
Displacer Kitten
21%inclusion36 decks173 decks
14%synergy
Opposition Agent
17%inclusion30 decks173 decks
9%synergy
Grim Guardian
17%inclusion30 decks173 decks
15%synergy
Drannith Magistrate
16%inclusion27 decks173 decks
7%synergy
Lurrus of the Dream-Den
15%inclusion26 decks173 decks
13%synergy
Archon of Sun's Grace
15%inclusion26 decks173 decks
10%synergy
Silent Hallcreeper
15%inclusion26 decks173 decks
11%synergy
Sage of Mysteries
14%inclusion24 decks173 decks
14%synergy
Mockingbird
14%inclusion24 decks173 decks
9%synergy
Ghostly Dancers
14%inclusion24 decks173 decks
11%synergy
Enduring Curiosity
13%inclusion23 decks173 decks
6%synergy
Aminatou, Veil Piercer
13%inclusion23 decks173 decks
12%synergy
Voice of Victory
13%inclusion15 decks116 decks
5%synergy
Moon-Blessed Cleric
13%inclusion22 decks173 decks
8%synergy
Archivist of Oghma
12%inclusion20 decks173 decks
5%synergy
Talion, the Kindly Lord
12%inclusion20 decks173 decks
3%synergy
Hedron Crab
12%inclusion20 decks173 decks
11%synergy
Phyrexian Metamorph
10%inclusion18 decks173 decks
2%synergy
Leonin Relic-Warder
10%inclusion17 decks173 decks
10%synergy
Psychic Frog
10%inclusion17 decks173 decks
3%synergy
Ghostly Pilferer
10%inclusion17 decks173 decks
3%synergy
Witch Enchanter
10%inclusion17 decks173 decks
3%synergy
Faerie Mastermind
9.2%inclusion16 decks173 decks
0%synergy
Auriok Salvagers
9.2%inclusion16 decks173 decks
9%synergy
Tataru Taru
9.0%inclusion9 decks100 decks
1%synergy
Nashi, Searcher in the Dark
8.1%inclusion14 decks173 decks
8%synergy
Mindwrack Harpy
8.1%inclusion14 decks173 decks
8%synergy
Athreos, Shroud-Veiled
7.5%inclusion13 decks173 decks
3%synergy
Ancient Cellarspawn
7.5%inclusion13 decks173 decks
4%synergy
Instants
Silence
31%inclusion54 decks173 decks
21%synergy
Counterspell
29%inclusion51 decks173 decks
-12%synergy
Force of Negation
29%inclusion50 decks173 decks
17%synergy
Mystical Tutor
28%inclusion48 decks173 decks
16%synergy
Tainted Pact
27%inclusion47 decks173 decks
20%synergy
Flusterstorm
27%inclusion46 decks173 decks
18%synergy
Intuition
26%inclusion45 decks173 decks
24%synergy
Mindbreak Trap
26%inclusion45 decks173 decks
19%synergy
Demonic Consultation
26%inclusion45 decks173 decks
18%synergy
Mana Drain
25%inclusion43 decks173 decks
7%synergy
Arcane Denial
25%inclusion43 decks173 decks
5%synergy
Sink into Stupor
25%inclusion43 decks173 decks
12%synergy
Path to Exile
25%inclusion43 decks173 decks
-17%synergy
Borne Upon a Wind
24%inclusion42 decks173 decks
19%synergy
Mental Misstep
23%inclusion40 decks173 decks
16%synergy
Pact of Negation
23%inclusion40 decks173 decks
15%synergy
Dovin's Veto
18%inclusion32 decks173 decks
-6%synergy
Cabal Ritual
17%inclusion29 decks173 decks
13%synergy
Gifts Ungiven
16%inclusion28 decks173 decks
14%synergy
Into the Flood Maw
14%inclusion25 decks173 decks
11%synergy
Frantic Search
13%inclusion22 decks173 decks
-4%synergy
Thirst for Meaning
13%inclusion22 decks173 decks
11%synergy
Chain of Vapor
12%inclusion20 decks173 decks
8%synergy
Negate
12%inclusion20 decks173 decks
-5%synergy
Void Rend
12%inclusion20 decks173 decks
-22%synergy
Inkshield
12%inclusion20 decks173 decks
2%synergy
Fell the Profane
11%inclusion19 decks173 decks
2%synergy
Retraction Helix
10%inclusion17 decks173 decks
9%synergy
Teferi's Protection
7.5%inclusion13 decks173 decks
-9%synergy
Brainstorm
7.5%inclusion13 decks173 decks
-10%synergy
Strix Serenade
7.5%inclusion13 decks173 decks
4%synergy
Deadly Rollick
6.9%inclusion12 decks173 decks
-7%synergy
Muddle the Mixture
6.4%inclusion11 decks173 decks
2%synergy
Fact or Fiction
6.4%inclusion11 decks173 decks
2%synergy
Darkblast
6.4%inclusion11 decks173 decks
6%synergy
Anguished Unmaking
6.4%inclusion11 decks173 decks
-18%synergy
Brain Freeze
5.8%inclusion10 decks173 decks
5%synergy
Culling the Weak
5.8%inclusion10 decks173 decks
4%synergy
Dawn's Truce
5.2%inclusion9 decks173 decks
1%synergy
Lim-Dûl's Vault
5.2%inclusion9 decks173 decks
2%synergy
Faithful Mending
5.2%inclusion9 decks173 decks
1%synergy
Delay
5.2%inclusion9 decks173 decks
3%synergy
Sorceries
Windfall
31%inclusion54 decks173 decks
17%synergy
Toxic Deluge
31%inclusion53 decks173 decks
11%synergy
Reanimate
25%inclusion43 decks173 decks
9%synergy
Imperial Seal
22%inclusion38 decks173 decks
14%synergy
Redress Fate
18%inclusion31 decks173 decks
12%synergy
Dance of the Manse
16%inclusion28 decks173 decks
13%synergy
Supreme Verdict
12%inclusion21 decks173 decks
-3%synergy
Extinguish All Hope
12%inclusion21 decks173 decks
10%synergy
Lively Dirge
12%inclusion21 decks173 decks
11%synergy
Demonic Counsel
12%inclusion20 decks173 decks
10%synergy
Singularity Rupture
11%inclusion10 decks87 decks
9%synergy
Damn
11%inclusion19 decks173 decks
-9%synergy
Space-Time Anomaly
10%inclusion9 decks87 decks
9%synergy
Idyllic Tutor
10%inclusion17 decks173 decks
6%synergy
Resurgent Belief
9.2%inclusion16 decks173 decks
7%synergy
Time Wipe
9.2%inclusion16 decks173 decks
2%synergy
Beseech the Mirror
9.2%inclusion16 decks173 decks
5%synergy
Glimpse the Unthinkable
9.2%inclusion16 decks173 decks
9%synergy
Buried Alive
8.7%inclusion15 decks173 decks
5%synergy
Unmarked Grave
8.1%inclusion14 decks173 decks
7%synergy
Yawgmoth's Will
6.9%inclusion12 decks173 decks
6%synergy
Replenish
6.4%inclusion11 decks173 decks
5%synergy
Mnemonic Betrayal
5.2%inclusion9 decks173 decks
2%synergy
Traumatize
5.2%inclusion9 decks173 decks
5%synergy
Utility Artifacts
The One Ring
27%inclusion47 decks173 decks
14%synergy
Mesmeric Orb
24%inclusion41 decks173 decks
23%synergy
Wishclaw Talisman
24%inclusion41 decks173 decks
15%synergy
Lightning Greaves
10%inclusion18 decks173 decks
-12%synergy
Cloud Key
5.8%inclusion10 decks173 decks
2%synergy
Enchantments
Mirrormade
41%inclusion71 decks173 decks
31%synergy
Propaganda
39%inclusion67 decks173 decks
12%synergy
Sphere of Safety
36%inclusion63 decks173 decks
27%synergy
Touch the Spirit Realm
34%inclusion58 decks173 decks
31%synergy
Grasp of Fate
33%inclusion57 decks173 decks
27%synergy
Ghostly Prison
33%inclusion57 decks173 decks
11%synergy
The Meathook Massacre
29%inclusion51 decks173 decks
26%synergy
Starfield of Nyx
29%inclusion50 decks173 decks
25%synergy
Secret Arcade // Dusty Parlor
27%inclusion47 decks173 decks
22%synergy
Tinybones Joins Up
27%inclusion46 decks173 decks
25%synergy
Seal of Removal
27%inclusion46 decks173 decks
26%synergy
Cemetery Tampering
25%inclusion44 decks173 decks
25%synergy
Static Prison
24%inclusion42 decks173 decks
24%synergy
Sigil of the Empty Throne
24%inclusion42 decks173 decks
18%synergy
Necropotence
24%inclusion41 decks173 decks
17%synergy
Stillness in Motion
22%inclusion25 decks115 decks
21%synergy
Estrid's Invocation
21%inclusion37 decks173 decks
17%synergy
Cacophony Unleashed
21%inclusion36 decks173 decks
19%synergy
Darksteel Mutation
19%inclusion33 decks173 decks
13%synergy
Out of the Tombs
18%inclusion31 decks173 decks
17%synergy
Copy Enchantment
18%inclusion31 decks173 decks
13%synergy
Greater Auramancy
18%inclusion31 decks173 decks
13%synergy
Imprisoned in the Moon
16%inclusion28 decks173 decks
10%synergy
Monologue Tax
16%inclusion28 decks173 decks
10%synergy
Sheltered by Ghosts
16%inclusion28 decks173 decks
14%synergy
Black Market Connections
16%inclusion28 decks173 decks
2%synergy
Authority of the Consuls
16%inclusion27 decks173 decks
4%synergy
Ethereal Armor
16%inclusion27 decks173 decks
11%synergy
The Tale of Tamiyo
15%inclusion26 decks173 decks
15%synergy
All That Glitters
15%inclusion26 decks173 decks
6%synergy
Aura of Silence
15%inclusion26 decks173 decks
12%synergy
Phyrexian Arena
14%inclusion25 decks173 decks
0%synergy
Trouble in Pairs
14%inclusion25 decks173 decks
9%synergy
Teval's Judgment
14%inclusion16 decks116 decks
13%synergy
Court of Cunning
13%inclusion23 decks173 decks
12%synergy
Timely Ward
13%inclusion23 decks173 decks
8%synergy
Defiled Crypt // Cadaver Lab
13%inclusion22 decks173 decks
12%synergy
Leyline of Anticipation
12%inclusion21 decks173 decks
8%synergy
Land Tax
12%inclusion21 decks173 decks
6%synergy
Nowhere to Run
12%inclusion21 decks173 decks
11%synergy
Founding the Third Path
12%inclusion20 decks173 decks
11%synergy
Shark Typhoon
12%inclusion20 decks173 decks
6%synergy
Unable to Scream
11%inclusion19 decks173 decks
10%synergy
Oubliette
11%inclusion19 decks173 decks
9%synergy
Solitary Confinement
11%inclusion19 decks173 decks
9%synergy
Extravagant Replication
10%inclusion18 decks173 decks
5%synergy
Secrets of the Dead
10%inclusion17 decks173 decks
10%synergy
Chthonian Nightmare
9.2%inclusion16 decks173 decks
9%synergy
Hallowed Haunting
9.2%inclusion16 decks173 decks
7%synergy
Copy Artifact
9.2%inclusion16 decks173 decks
8%synergy
Battles
Invasion of Theros
6.4%inclusion11 decks173 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
19%inclusion33 decks173 decks
11%synergy
Utility Lands
Hall of Heliod's Generosity
47%inclusion82 decks173 decks
34%synergy
Otawara, Soaring City
43%inclusion74 decks173 decks
24%synergy
Bojuka Bog
28%inclusion48 decks173 decks
0%synergy
Urza's Saga
21%inclusion36 decks173 decks
9%synergy
Cephalid Coliseum
20%inclusion35 decks173 decks
17%synergy
Takenuma, Abandoned Mire
15%inclusion26 decks173 decks
9%synergy
Emergence Zone
14%inclusion24 decks173 decks
12%synergy
Serra's Sanctum
10%inclusion17 decks173 decks
8%synergy
Urborg, Tomb of Yawgmoth
8.7%inclusion15 decks173 decks
-5%synergy
Minamo, School at Water's Edge
6.4%inclusion11 decks173 decks
2%synergy
Ishgard, the Holy See
6.0%inclusion6 decks100 decks
2%synergy
Eiganjo, Seat of the Empire
5.8%inclusion10 decks173 decks
1%synergy
Reliquary Tower
5.2%inclusion9 decks173 decks
-29%synergy
Temple of the False God
5.2%inclusion9 decks173 decks
-3%synergy
Mana Artifacts
Sol Ring
92%inclusion160 decks173 decks
3%synergy
Arcane Signet
90%inclusion156 decks173 decks
2%synergy
Talisman of Dominance
71%inclusion122 decks173 decks
21%synergy
Talisman of Progress
64%inclusion110 decks173 decks
21%synergy
Talisman of Hierarchy
55%inclusion96 decks173 decks
12%synergy
Fellwar Stone
48%inclusion83 decks173 decks
14%synergy
Lotus Petal
31%inclusion53 decks173 decks
20%synergy
Mana Vault
31%inclusion53 decks173 decks
21%synergy
Chrome Mox
29%inclusion51 decks173 decks
20%synergy
Mox Diamond
24%inclusion42 decks173 decks
17%synergy
Mox Opal
23%inclusion40 decks173 decks
14%synergy
Azorius Signet
21%inclusion37 decks173 decks
-11%synergy
Orzhov Signet
18%inclusion32 decks173 decks
-16%synergy
Dimir Signet
18%inclusion32 decks173 decks
-14%synergy
Lion's Eye Diamond
17%inclusion29 decks173 decks
15%synergy
Mox Amber
10%inclusion17 decks173 decks
4%synergy
Grim Monolith
9.2%inclusion16 decks173 decks
6%synergy
Mind Stone
7.5%inclusion13 decks173 decks
-5%synergy
Lands
Command Tower
96%inclusion166 decks173 decks
4%synergy
Island
84%inclusion146 decks173 decks
-8%synergy
Swamp
80%inclusion139 decks173 decks
-11%synergy
Plains
76%inclusion132 decks173 decks
-15%synergy
Watery Grave
72%inclusion124 decks173 decks
22%synergy
Godless Shrine
71%inclusion122 decks173 decks
20%synergy
Hallowed Fountain
69%inclusion119 decks173 decks
20%synergy
Flooded Strand
65%inclusion113 decks173 decks
27%synergy
Exotic Orchard
64%inclusion111 decks173 decks
6%synergy
Polluted Delta
64%inclusion110 decks173 decks
26%synergy
Marsh Flats
63%inclusion109 decks173 decks
27%synergy
Caves of Koilos
48%inclusion83 decks173 decks
13%synergy
Sea of Clouds
48%inclusion83 decks173 decks
12%synergy
Morphic Pool
47%inclusion81 decks173 decks
13%synergy
Adarkar Wastes
45%inclusion78 decks173 decks
14%synergy
Underground River
44%inclusion76 decks173 decks
11%synergy
Undercity Sewers
42%inclusion72 decks173 decks
28%synergy
Vault of Champions
40%inclusion70 decks173 decks
8%synergy
City of Brass
37%inclusion64 decks173 decks
22%synergy
Bloodstained Mire
36%inclusion62 decks173 decks
25%synergy
Raffine's Tower
35%inclusion61 decks173 decks
-6%synergy
Misty Rainforest
35%inclusion60 decks173 decks
23%synergy
Verdant Catacombs
34%inclusion59 decks173 decks
24%synergy
Arcane Sanctum
34%inclusion59 decks173 decks
-20%synergy
Mana Confluence
34%inclusion59 decks173 decks
20%synergy
Tundra
32%inclusion56 decks173 decks
16%synergy
Glacial Fortress
32%inclusion55 decks173 decks
-8%synergy
Underground Sea
32%inclusion55 decks173 decks
16%synergy
Scalding Tarn
32%inclusion55 decks173 decks
21%synergy
Meticulous Archive
32%inclusion55 decks173 decks
18%synergy
Scrubland
32%inclusion55 decks173 decks
16%synergy
Windswept Heath
31%inclusion54 decks173 decks
21%synergy
Isolated Chapel
29%inclusion51 decks173 decks
-9%synergy
Gemstone Caverns
28%inclusion48 decks173 decks
20%synergy
Shadowy Backstreet
28%inclusion48 decks173 decks
15%synergy
Drowned Catacomb
27%inclusion47 decks173 decks
-8%synergy
Arid Mesa
27%inclusion46 decks173 decks
17%synergy
Sink into Stupor
25%inclusion43 decks173 decks
12%synergy
Valgavoth's Lair
23%inclusion40 decks173 decks
20%synergy
Deserted Beach
21%inclusion36 decks173 decks
0%synergy
Contaminated Landscape
20%inclusion34 decks173 decks
5%synergy
Floodfarm Verge
20%inclusion34 decks173 decks
8%synergy
Gloomlake Verge
20%inclusion34 decks173 decks
9%synergy
Prairie Stream
19%inclusion33 decks173 decks
-22%synergy
Terramorphic Expanse
18%inclusion31 decks173 decks
1%synergy
Sunken Hollow
18%inclusion31 decks173 decks
-22%synergy
Evolving Wilds
17%inclusion30 decks173 decks
-8%synergy
Shipwreck Marsh
16%inclusion28 decks173 decks
-4%synergy
Obscura Storefront
16%inclusion27 decks173 decks
5%synergy
Tainted Field
14%inclusion25 decks173 decks
7%synergy
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