The Master of Keys (Commander) - Mill

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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Wan Shi Tong, Librarian
19%inclusion5 decks27 decks
14%synergy
Waterbender Ascension
5.3%inclusion1 decks19 decks
4%synergy
Airbender Ascension
3.7%inclusion1 decks27 decks
3%synergy
High Synergy Cards
Ripples of Undeath
66%inclusion181 decks276 decks
63%synergy
Animate Dead
71%inclusion196 decks276 decks
61%synergy
Necromancy
61%inclusion167 decks276 decks
56%synergy
Dress Down
57%inclusion158 decks276 decks
55%synergy
Inquisitive Glimmer
57%inclusion158 decks276 decks
49%synergy
Scrabbling Skullcrab
46%inclusion126 decks276 decks
45%synergy
Entity Tracker
49%inclusion135 decks276 decks
42%synergy
Mesa Enchantress
51%inclusion142 decks276 decks
42%synergy
Gravebreaker Lamia
43%inclusion118 decks276 decks
42%synergy
Dance of the Dead
43%inclusion118 decks276 decks
41%synergy
Top Cards
Mystic Remora
61%inclusion169 decks276 decks
40%synergy
Swords to Plowshares
59%inclusion162 decks276 decks
-10%synergy
Sevinne's Reclamation
49%inclusion136 decks276 decks
40%synergy
Starfield Mystic
45%inclusion123 decks276 decks
38%synergy
Overlord of the Balemurk
42%inclusion117 decks276 decks
40%synergy
Entomb
42%inclusion116 decks276 decks
35%synergy
Demon of Fate's Design
41%inclusion114 decks276 decks
36%synergy
Dark Ritual
40%inclusion111 decks276 decks
21%synergy
Blind Obedience
39%inclusion109 decks276 decks
27%synergy
Doomwake Giant
38%inclusion104 decks276 decks
32%synergy
Game Changers
Smothering Tithe
51%inclusion141 decks276 decks
19%synergy
Rhystic Study
47%inclusion129 decks276 decks
14%synergy
Enlightened Tutor
39%inclusion109 decks276 decks
19%synergy
Demonic Tutor
32%inclusion89 decks276 decks
11%synergy
Thassa's Oracle
31%inclusion85 decks276 decks
21%synergy
Vampiric Tutor
28%inclusion77 decks276 decks
10%synergy
Ancient Tomb
26%inclusion73 decks276 decks
13%synergy
Force of Will
25%inclusion68 decks276 decks
12%synergy
Mana Vault
24%inclusion67 decks276 decks
15%synergy
Chrome Mox
23%inclusion63 decks276 decks
13%synergy
Creatures
Overlord of the Floodpits
37%inclusion103 decks276 decks
33%synergy
Fear of Sleep Paralysis
36%inclusion98 decks276 decks
30%synergy
Abdel Adrian, Gorion's Ward
33%inclusion92 decks276 decks
32%synergy
Victor, Valgavoth's Seneschal
33%inclusion90 decks276 decks
30%synergy
Esper Sentinel
32%inclusion89 decks276 decks
4%synergy
Fear of Impostors
32%inclusion88 decks276 decks
30%synergy
Ondu Spiritdancer
29%inclusion81 decks276 decks
23%synergy
Lotho, Corrupt Shirriff
27%inclusion75 decks276 decks
10%synergy
Grand Abolisher
27%inclusion74 decks276 decks
12%synergy
Zur, Eternal Schemer
26%inclusion73 decks276 decks
23%synergy
Silent Hallcreeper
22%inclusion62 decks276 decks
18%synergy
Zur the Enchanter
22%inclusion61 decks276 decks
17%synergy
Heliod, the Radiant Dawn
22%inclusion61 decks276 decks
18%synergy
Valley Floodcaller
22%inclusion60 decks276 decks
17%synergy
Orcish Bowmasters
22%inclusion60 decks276 decks
10%synergy
Enduring Curiosity
22%inclusion60 decks276 decks
14%synergy
Ghostly Dancers
22%inclusion60 decks276 decks
19%synergy
Grim Guardian
21%inclusion59 decks276 decks
19%synergy
Hullbreaker Horror
20%inclusion56 decks276 decks
14%synergy
Mindwrack Harpy
20%inclusion54 decks276 decks
19%synergy
Displacer Kitten
19%inclusion52 decks276 decks
11%synergy
Hedron Crab
19%inclusion52 decks276 decks
18%synergy
Ranger-Captain of Eos
18%inclusion51 decks276 decks
12%synergy
Ledger Shredder
16%inclusion44 decks276 decks
7%synergy
Archon of Sun's Grace
16%inclusion43 decks276 decks
11%synergy
Sage of Mysteries
16%inclusion43 decks276 decks
15%synergy
Aminatou, Veil Piercer
16%inclusion43 decks276 decks
14%synergy
Alseid of Life's Bounty
16%inclusion43 decks276 decks
14%synergy
Lurrus of the Dream-Den
15%inclusion42 decks276 decks
14%synergy
Skullsnap Nuisance
15%inclusion42 decks276 decks
15%synergy
Moon-Blessed Cleric
15%inclusion41 decks276 decks
10%synergy
Soaring Lightbringer
14%inclusion40 decks276 decks
9%synergy
Voice of Victory
14%inclusion19 decks132 decks
6%synergy
Overlord of the Mistmoors
13%inclusion35 decks276 decks
10%synergy
Opposition Agent
12%inclusion32 decks276 decks
3%synergy
Balemurk Leech
12%inclusion32 decks276 decks
11%synergy
Spirited Companion
11%inclusion31 decks276 decks
9%synergy
Laboratory Maniac
11%inclusion31 decks276 decks
8%synergy
Drannith Magistrate
11%inclusion31 decks276 decks
3%synergy
Mockingbird
11%inclusion30 decks276 decks
6%synergy
Nashi, Searcher in the Dark
11%inclusion29 decks276 decks
10%synergy
The Mindskinner
10%inclusion28 decks276 decks
9%synergy
Archivist of Oghma
10%inclusion27 decks276 decks
3%synergy
Athreos, Shroud-Veiled
10%inclusion27 decks276 decks
5%synergy
Gremlin Tamer
10%inclusion27 decks276 decks
9%synergy
Stitcher's Supplier
10%inclusion27 decks276 decks
9%synergy
Millikin
9.4%inclusion26 decks276 decks
9%synergy
Ancient Cellarspawn
9.1%inclusion25 decks276 decks
6%synergy
Phenax, God of Deception
8.7%inclusion24 decks276 decks
8%synergy
Talion, the Kindly Lord
8.0%inclusion22 decks276 decks
0%synergy
Instants
Counterspell
34%inclusion93 decks276 decks
-7%synergy
An Offer You Can't Refuse
33%inclusion92 decks276 decks
7%synergy
Swan Song
30%inclusion82 decks276 decks
10%synergy
Path to Exile
27%inclusion74 decks276 decks
-15%synergy
Arcane Denial
26%inclusion72 decks276 decks
6%synergy
Silence
24%inclusion66 decks276 decks
14%synergy
Fierce Guardianship
22%inclusion62 decks276 decks
2%synergy
Force of Negation
22%inclusion60 decks276 decks
10%synergy
Demonic Consultation
21%inclusion59 decks276 decks
13%synergy
Flusterstorm
21%inclusion58 decks276 decks
13%synergy
Cyclonic Rift
21%inclusion58 decks276 decks
-4%synergy
Tainted Pact
20%inclusion56 decks276 decks
13%synergy
Intuition
20%inclusion55 decks276 decks
18%synergy
Mental Misstep
19%inclusion52 decks276 decks
12%synergy
Borne Upon a Wind
19%inclusion52 decks276 decks
14%synergy
Mindbreak Trap
18%inclusion51 decks276 decks
12%synergy
Pact of Negation
18%inclusion51 decks276 decks
10%synergy
Mystical Tutor
18%inclusion51 decks276 decks
7%synergy
Cabal Ritual
18%inclusion50 decks276 decks
15%synergy
Void Rend
17%inclusion48 decks276 decks
-16%synergy
Dovin's Veto
17%inclusion47 decks276 decks
-8%synergy
Sink into Stupor
17%inclusion46 decks276 decks
4%synergy
Otherworldly Gaze
16%inclusion43 decks276 decks
13%synergy
Mana Drain
15%inclusion42 decks276 decks
-2%synergy
Thirst for Meaning
15%inclusion42 decks276 decks
14%synergy
Frantic Search
14%inclusion38 decks276 decks
-3%synergy
Negate
11%inclusion30 decks276 decks
-6%synergy
Gifts Ungiven
10%inclusion27 decks276 decks
8%synergy
Into the Flood Maw
10%inclusion27 decks276 decks
6%synergy
Fell the Profane
9.4%inclusion26 decks276 decks
1%synergy
Brainstorm
9.4%inclusion26 decks276 decks
-8%synergy
Chain of Vapor
9.1%inclusion25 decks276 decks
5%synergy
Anguished Unmaking
8.7%inclusion24 decks276 decks
-16%synergy
Faithful Mending
7.6%inclusion21 decks276 decks
4%synergy
Strix Serenade
7.2%inclusion20 decks276 decks
3%synergy
Brain Freeze
6.9%inclusion19 decks276 decks
6%synergy
Thought Scour
6.9%inclusion19 decks276 decks
6%synergy
Inkshield
6.9%inclusion19 decks276 decks
-2%synergy
Retraction Helix
6.5%inclusion18 decks276 decks
6%synergy
Generous Gift
6.2%inclusion17 decks276 decks
-9%synergy
Ad Nauseam
5.1%inclusion14 decks276 decks
3%synergy
Sorceries
Reanimate
29%inclusion80 decks276 decks
13%synergy
Windfall
28%inclusion76 decks276 decks
14%synergy
Redress Fate
25%inclusion69 decks276 decks
19%synergy
Toxic Deluge
20%inclusion54 decks276 decks
0%synergy
Imperial Seal
19%inclusion52 decks276 decks
11%synergy
Dance of the Manse
17%inclusion46 decks276 decks
13%synergy
Singularity Rupture
16%inclusion13 decks80 decks
14%synergy
Space-Time Anomaly
14%inclusion11 decks77 decks
12%synergy
Glimpse the Unthinkable
13%inclusion37 decks276 decks
13%synergy
Damn
13%inclusion37 decks276 decks
-7%synergy
Demonic Counsel
12%inclusion34 decks276 decks
11%synergy
Lively Dirge
11%inclusion31 decks276 decks
10%synergy
Extinguish All Hope
11%inclusion30 decks276 decks
9%synergy
Breach the Multiverse
8.7%inclusion24 decks276 decks
6%synergy
Unmarked Grave
8.0%inclusion22 decks276 decks
7%synergy
Resurgent Belief
7.6%inclusion21 decks276 decks
5%synergy
Idyllic Tutor
7.6%inclusion21 decks276 decks
3%synergy
Traumatize
7.6%inclusion21 decks276 decks
7%synergy
Supreme Verdict
7.2%inclusion20 decks276 decks
-8%synergy
Ponder
6.9%inclusion19 decks276 decks
-2%synergy
Replenish
6.9%inclusion19 decks276 decks
5%synergy
Wrath of God
6.9%inclusion19 decks276 decks
3%synergy
Time Wipe
6.5%inclusion18 decks276 decks
-1%synergy
Beseech the Mirror
6.5%inclusion18 decks276 decks
2%synergy
Maddening Cacophony
6.2%inclusion17 decks276 decks
5%synergy
Farewell
5.8%inclusion16 decks276 decks
-7%synergy
Cut Your Losses
5.8%inclusion16 decks276 decks
5%synergy
Buried Alive
5.8%inclusion16 decks276 decks
2%synergy
Mnemonic Betrayal
5.1%inclusion14 decks276 decks
2%synergy
Utility Artifacts
Mesmeric Orb
29%inclusion80 decks276 decks
28%synergy
The One Ring
20%inclusion55 decks276 decks
6%synergy
Wishclaw Talisman
18%inclusion49 decks276 decks
9%synergy
Lightning Greaves
11%inclusion31 decks276 decks
-11%synergy
Cloud Key
6.9%inclusion19 decks276 decks
4%synergy
Wayfarer's Bauble
6.5%inclusion18 decks276 decks
-2%synergy
Mindcrank
6.5%inclusion18 decks276 decks
4%synergy
Altar of Dementia
6.5%inclusion18 decks276 decks
5%synergy
Perpetual Timepiece
5.1%inclusion14 decks276 decks
5%synergy
Enchantments
Mirrormade
37%inclusion103 decks276 decks
27%synergy
Amphibian Downpour
37%inclusion101 decks276 decks
32%synergy
Cemetery Tampering
36%inclusion98 decks276 decks
35%synergy
Propaganda
34%inclusion94 decks276 decks
8%synergy
Sphere of Safety
32%inclusion87 decks276 decks
22%synergy
Seal of Cleansing
30%inclusion84 decks276 decks
29%synergy
Secret Arcade // Dusty Parlor
30%inclusion84 decks276 decks
25%synergy
Grasp of Fate
29%inclusion80 decks276 decks
23%synergy
Ghostly Prison
29%inclusion79 decks276 decks
7%synergy
Starfield of Nyx
26%inclusion71 decks276 decks
22%synergy
Sigil of the Empty Throne
24%inclusion67 decks276 decks
18%synergy
Out of the Tombs
24%inclusion67 decks276 decks
24%synergy
Touch the Spirit Realm
24%inclusion67 decks276 decks
22%synergy
Estrid's Invocation
23%inclusion63 decks276 decks
18%synergy
Necropotence
22%inclusion61 decks276 decks
15%synergy
The Meathook Massacre
22%inclusion60 decks276 decks
18%synergy
Stillness in Motion
22%inclusion28 decks130 decks
21%synergy
Cacophony Unleashed
21%inclusion59 decks276 decks
20%synergy
Court of Cunning
21%inclusion58 decks276 decks
20%synergy
Tinybones Joins Up
20%inclusion56 decks276 decks
19%synergy
Seal of Removal
20%inclusion56 decks276 decks
20%synergy
The Tale of Tamiyo
20%inclusion56 decks276 decks
20%synergy
Polluted Cistern // Dim Oubliette
20%inclusion54 decks275 decks
19%synergy
Defiled Crypt // Cadaver Lab
19%inclusion53 decks274 decks
19%synergy
Static Prison
19%inclusion53 decks276 decks
19%synergy
Black Market Connections
18%inclusion51 decks276 decks
5%synergy
Monologue Tax
18%inclusion50 decks276 decks
12%synergy
Greater Auramancy
17%inclusion47 decks276 decks
13%synergy
Darksteel Mutation
16%inclusion43 decks276 decks
9%synergy
Phyrexian Arena
16%inclusion43 decks276 decks
2%synergy
Shark Typhoon
15%inclusion42 decks276 decks
9%synergy
Copy Enchantment
14%inclusion38 decks276 decks
9%synergy
Chthonian Nightmare
14%inclusion38 decks276 decks
13%synergy
Secrets of the Dead
13%inclusion37 decks276 decks
13%synergy
Hallowed Haunting
13%inclusion37 decks276 decks
11%synergy
All That Glitters
13%inclusion37 decks276 decks
5%synergy
Leyline of Anticipation
12%inclusion33 decks276 decks
7%synergy
Ethereal Armor
12%inclusion33 decks276 decks
7%synergy
Imprisoned in the Moon
12%inclusion32 decks276 decks
5%synergy
Founding the Third Path
11%inclusion31 decks276 decks
11%synergy
Extravagant Replication
11%inclusion31 decks276 decks
6%synergy
Sheltered by Ghosts
11%inclusion30 decks276 decks
8%synergy
Teval's Judgment
11%inclusion14 decks132 decks
10%synergy
Copy Artifact
11%inclusion29 decks276 decks
9%synergy
Timely Ward
11%inclusion29 decks276 decks
6%synergy
Nowhere to Run
11%inclusion29 decks276 decks
9%synergy
Aura of Silence
10%inclusion28 decks276 decks
7%synergy
Authority of the Consuls
10%inclusion27 decks276 decks
-1%synergy
Trouble in Pairs
10%inclusion27 decks276 decks
4%synergy
Search for Azcanta
9.4%inclusion26 decks276 decks
8%synergy
Battles
Invasion of Theros
6.9%inclusion19 decks276 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
17%inclusion47 decks276 decks
9%synergy
Jace, Wielder of Mysteries
9.1%inclusion25 decks276 decks
7%synergy
Utility Lands
Hall of Heliod's Generosity
46%inclusion128 decks276 decks
33%synergy
Otawara, Soaring City
38%inclusion104 decks276 decks
19%synergy
Bojuka Bog
33%inclusion90 decks276 decks
5%synergy
Takenuma, Abandoned Mire
21%inclusion57 decks276 decks
14%synergy
Urza's Saga
16%inclusion45 decks276 decks
4%synergy
Cephalid Coliseum
16%inclusion44 decks276 decks
12%synergy
Reliquary Tower
13%inclusion36 decks276 decks
-21%synergy
Urborg, Tomb of Yawgmoth
12%inclusion33 decks276 decks
-1%synergy
Emergence Zone
12%inclusion32 decks276 decks
9%synergy
Nephalia Drownyard
11%inclusion30 decks276 decks
10%synergy
Serra's Sanctum
9.4%inclusion26 decks276 decks
8%synergy
Minamo, School at Water's Edge
7.2%inclusion20 decks276 decks
3%synergy
Halimar Depths
7.2%inclusion20 decks276 decks
2%synergy
Ishgard, the Holy See
6.8%inclusion7 decks103 decks
3%synergy
Rogue's Passage
5.4%inclusion15 decks276 decks
-4%synergy
Mana Artifacts
Arcane Signet
92%inclusion253 decks276 decks
4%synergy
Sol Ring
92%inclusion253 decks276 decks
2%synergy
Talisman of Dominance
61%inclusion167 decks276 decks
12%synergy
Talisman of Progress
53%inclusion145 decks276 decks
10%synergy
Talisman of Hierarchy
49%inclusion136 decks276 decks
6%synergy
Fellwar Stone
42%inclusion117 decks276 decks
8%synergy
Azorius Signet
26%inclusion73 decks276 decks
-6%synergy
Orzhov Signet
24%inclusion66 decks276 decks
-11%synergy
Lotus Petal
23%inclusion64 decks276 decks
12%synergy
Dimir Signet
22%inclusion61 decks276 decks
-11%synergy
Mox Diamond
20%inclusion54 decks276 decks
12%synergy
Mox Opal
19%inclusion52 decks276 decks
10%synergy
Lion's Eye Diamond
17%inclusion46 decks276 decks
14%synergy
Mox Amber
10%inclusion27 decks276 decks
4%synergy
Mind Stone
10%inclusion27 decks276 decks
-3%synergy
Commander's Sphere
8.7%inclusion24 decks276 decks
-11%synergy
Grim Monolith
8.3%inclusion23 decks276 decks
5%synergy
Thought Vessel
7.6%inclusion21 decks276 decks
-17%synergy
Chromatic Lantern
5.4%inclusion15 decks276 decks
-8%synergy
Lands
Command Tower
97%inclusion267 decks276 decks
4%synergy
Island
86%inclusion236 decks276 decks
-7%synergy
Swamp
83%inclusion228 decks276 decks
-9%synergy
Plains
81%inclusion224 decks276 decks
-10%synergy
Hallowed Fountain
60%inclusion165 decks276 decks
11%synergy
Exotic Orchard
59%inclusion164 decks276 decks
1%synergy
Watery Grave
59%inclusion164 decks276 decks
10%synergy
Godless Shrine
58%inclusion159 decks276 decks
8%synergy
Flooded Strand
56%inclusion155 decks276 decks
18%synergy
Polluted Delta
55%inclusion153 decks276 decks
18%synergy
Marsh Flats
51%inclusion141 decks276 decks
15%synergy
Arcane Sanctum
45%inclusion125 decks276 decks
-9%synergy
Adarkar Wastes
44%inclusion121 decks276 decks
13%synergy
Undercity Sewers
41%inclusion114 decks276 decks
27%synergy
Caves of Koilos
41%inclusion114 decks276 decks
6%synergy
Sea of Clouds
41%inclusion113 decks276 decks
5%synergy
Morphic Pool
41%inclusion113 decks276 decks
6%synergy
Vault of Champions
40%inclusion110 decks276 decks
7%synergy
Underground River
39%inclusion109 decks276 decks
7%synergy
Raffine's Tower
38%inclusion106 decks276 decks
-3%synergy
Meticulous Archive
33%inclusion92 decks276 decks
20%synergy
Shadowy Backstreet
33%inclusion90 decks276 decks
20%synergy
Isolated Chapel
31%inclusion86 decks276 decks
-7%synergy
Valgavoth's Lair
29%inclusion81 decks276 decks
26%synergy
Glacial Fortress
28%inclusion77 decks276 decks
-11%synergy
Drowned Catacomb
28%inclusion77 decks276 decks
-7%synergy
City of Brass
28%inclusion77 decks276 decks
13%synergy
Mana Confluence
27%inclusion75 decks276 decks
13%synergy
Scrubland
26%inclusion71 decks276 decks
10%synergy
Tundra
25%inclusion70 decks276 decks
9%synergy
Underground Sea
25%inclusion70 decks276 decks
10%synergy
Bloodstained Mire
25%inclusion68 decks276 decks
13%synergy
Evolving Wilds
24%inclusion65 decks276 decks
-2%synergy
Misty Rainforest
23%inclusion64 decks276 decks
12%synergy
Verdant Catacombs
23%inclusion63 decks276 decks
12%synergy
Scalding Tarn
23%inclusion63 decks276 decks
11%synergy
Windswept Heath
22%inclusion62 decks276 decks
12%synergy
Gemstone Caverns
22%inclusion62 decks276 decks
15%synergy
Prairie Stream
22%inclusion60 decks276 decks
-19%synergy
Sunken Hollow
22%inclusion60 decks276 decks
-18%synergy
Temple of Deceit
21%inclusion59 decks276 decks
3%synergy
Terramorphic Expanse
21%inclusion57 decks276 decks
4%synergy
Temple of Silence
20%inclusion56 decks276 decks
0%synergy
Temple of Enlightenment
20%inclusion55 decks276 decks
3%synergy
Arid Mesa
20%inclusion55 decks276 decks
10%synergy
Contaminated Landscape
19%inclusion53 decks276 decks
4%synergy
Shipwreck Marsh
19%inclusion52 decks276 decks
-2%synergy
Gloomlake Verge
18%inclusion51 decks276 decks
7%synergy
Azorius Chancery
18%inclusion50 decks276 decks
3%synergy
Deserted Beach
18%inclusion50 decks276 decks
-3%synergy
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