The Master of Keys (Commander) - Mill

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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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Mornsong Aria
8.0%inclusion2 decks25 decks
7%synergy
Twilight Diviner
4.3%inclusion1 decks23 decks
3%synergy
Noggle the Mind
4.3%inclusion1 decks23 decks
4%synergy
Voracious Tome-Skimmer
4.0%inclusion1 decks25 decks
3%synergy
Dawnhand Dissident
4.0%inclusion1 decks25 decks
4%synergy
High Synergy Cards
Ripples of Undeath
65%inclusion185 decks284 decks
62%synergy
Animate Dead
71%inclusion201 decks284 decks
61%synergy
Necromancy
61%inclusion172 decks284 decks
56%synergy
Dress Down
57%inclusion163 decks284 decks
55%synergy
Inquisitive Glimmer
58%inclusion164 decks284 decks
50%synergy
Scrabbling Skullcrab
45%inclusion127 decks284 decks
44%synergy
Entity Tracker
49%inclusion139 decks284 decks
43%synergy
Mesa Enchantress
50%inclusion143 decks284 decks
41%synergy
Gravebreaker Lamia
42%inclusion119 decks284 decks
41%synergy
Dance of the Dead
43%inclusion121 decks284 decks
40%synergy
Top Cards
Mystic Remora
61%inclusion174 decks284 decks
40%synergy
Swords to Plowshares
59%inclusion167 decks284 decks
-9%synergy
Sevinne's Reclamation
49%inclusion139 decks284 decks
40%synergy
Starfield Mystic
44%inclusion125 decks284 decks
37%synergy
Overlord of the Balemurk
42%inclusion119 decks284 decks
40%synergy
Entomb
42%inclusion118 decks284 decks
35%synergy
Dark Ritual
41%inclusion117 decks284 decks
22%synergy
Demon of Fate's Design
41%inclusion116 decks284 decks
35%synergy
Blind Obedience
39%inclusion110 decks284 decks
26%synergy
Mirrormade
38%inclusion108 decks284 decks
28%synergy
Game Changers
Smothering Tithe
51%inclusion144 decks284 decks
19%synergy
Rhystic Study
46%inclusion132 decks284 decks
15%synergy
Enlightened Tutor
40%inclusion113 decks284 decks
20%synergy
Demonic Tutor
32%inclusion92 decks284 decks
11%synergy
Thassa's Oracle
30%inclusion86 decks284 decks
21%synergy
Vampiric Tutor
27%inclusion78 decks284 decks
10%synergy
Ancient Tomb
26%inclusion75 decks284 decks
13%synergy
Force of Will
24%inclusion69 decks284 decks
12%synergy
Mana Vault
24%inclusion68 decks284 decks
15%synergy
Fierce Guardianship
23%inclusion64 decks284 decks
2%synergy
Creatures
Overlord of the Floodpits
37%inclusion105 decks284 decks
33%synergy
Doomwake Giant
37%inclusion105 decks284 decks
31%synergy
Fear of Sleep Paralysis
35%inclusion100 decks284 decks
30%synergy
Abdel Adrian, Gorion's Ward
33%inclusion93 decks284 decks
31%synergy
Fear of Impostors
32%inclusion92 decks284 decks
31%synergy
Victor, Valgavoth's Seneschal
32%inclusion92 decks284 decks
30%synergy
Esper Sentinel
32%inclusion91 decks284 decks
4%synergy
Ondu Spiritdancer
30%inclusion85 decks284 decks
24%synergy
Lotho, Corrupt Shirriff
28%inclusion80 decks284 decks
11%synergy
Grand Abolisher
26%inclusion75 decks284 decks
12%synergy
Zur, Eternal Schemer
26%inclusion74 decks284 decks
23%synergy
Heliod, the Radiant Dawn
23%inclusion64 decks284 decks
19%synergy
Silent Hallcreeper
22%inclusion63 decks284 decks
18%synergy
Orcish Bowmasters
22%inclusion63 decks284 decks
11%synergy
Valley Floodcaller
22%inclusion62 decks284 decks
18%synergy
Ghostly Dancers
22%inclusion62 decks284 decks
19%synergy
Grim Guardian
21%inclusion61 decks284 decks
19%synergy
Zur the Enchanter
21%inclusion61 decks284 decks
16%synergy
Enduring Curiosity
21%inclusion60 decks284 decks
13%synergy
Hullbreaker Horror
20%inclusion56 decks284 decks
14%synergy
Hedron Crab
19%inclusion55 decks284 decks
19%synergy
Mindwrack Harpy
19%inclusion53 decks284 decks
18%synergy
Ranger-Captain of Eos
18%inclusion52 decks284 decks
12%synergy
Displacer Kitten
18%inclusion51 decks284 decks
11%synergy
Ledger Shredder
17%inclusion47 decks284 decks
8%synergy
Wan Shi Tong, Librarian
16%inclusion9 decks55 decks
11%synergy
Lurrus of the Dream-Den
15%inclusion43 decks284 decks
14%synergy
Sage of Mysteries
15%inclusion43 decks284 decks
15%synergy
Alseid of Life's Bounty
15%inclusion43 decks284 decks
14%synergy
Archon of Sun's Grace
15%inclusion42 decks284 decks
10%synergy
Moon-Blessed Cleric
14%inclusion41 decks284 decks
10%synergy
Skullsnap Nuisance
14%inclusion41 decks284 decks
14%synergy
Voice of Victory
14%inclusion20 decks145 decks
5%synergy
Soaring Lightbringer
14%inclusion39 decks284 decks
9%synergy
Aminatou, Veil Piercer
14%inclusion39 decks284 decks
12%synergy
Overlord of the Mistmoors
13%inclusion36 decks284 decks
11%synergy
Balemurk Leech
12%inclusion35 decks284 decks
12%synergy
Opposition Agent
12%inclusion34 decks284 decks
3%synergy
Mockingbird
12%inclusion33 decks284 decks
7%synergy
Drannith Magistrate
11%inclusion31 decks284 decks
3%synergy
Laboratory Maniac
11%inclusion31 decks284 decks
8%synergy
Spirited Companion
11%inclusion30 decks284 decks
9%synergy
The Mindskinner
10%inclusion29 decks284 decks
9%synergy
Stitcher's Supplier
10%inclusion29 decks284 decks
9%synergy
Tataru Taru
10%inclusion12 decks118 decks
2%synergy
Athreos, Shroud-Veiled
10%inclusion28 decks284 decks
5%synergy
Archivist of Oghma
10%inclusion27 decks284 decks
3%synergy
Nashi, Searcher in the Dark
10%inclusion27 decks284 decks
9%synergy
Ancient Cellarspawn
10%inclusion27 decks284 decks
6%synergy
Millikin
10%inclusion27 decks284 decks
9%synergy
Instants
An Offer You Can't Refuse
34%inclusion97 decks284 decks
7%synergy
Counterspell
33%inclusion93 decks284 decks
-9%synergy
Swan Song
30%inclusion84 decks284 decks
10%synergy
Path to Exile
28%inclusion79 decks284 decks
-14%synergy
Arcane Denial
26%inclusion73 decks284 decks
5%synergy
Silence
25%inclusion70 decks284 decks
14%synergy
Demonic Consultation
21%inclusion61 decks284 decks
13%synergy
Force of Negation
21%inclusion61 decks284 decks
10%synergy
Flusterstorm
20%inclusion58 decks284 decks
12%synergy
Tainted Pact
20%inclusion57 decks284 decks
13%synergy
Intuition
20%inclusion56 decks284 decks
18%synergy
Mental Misstep
19%inclusion55 decks284 decks
13%synergy
Cyclonic Rift
19%inclusion55 decks284 decks
-5%synergy
Mystical Tutor
19%inclusion54 decks284 decks
8%synergy
Borne Upon a Wind
19%inclusion54 decks284 decks
14%synergy
Mindbreak Trap
19%inclusion53 decks284 decks
12%synergy
Cabal Ritual
18%inclusion52 decks284 decks
15%synergy
Pact of Negation
18%inclusion52 decks284 decks
10%synergy
Dovin's Veto
18%inclusion50 decks284 decks
-8%synergy
Void Rend
17%inclusion49 decks284 decks
-17%synergy
Sink into Stupor
17%inclusion47 decks284 decks
4%synergy
Mana Drain
15%inclusion42 decks284 decks
-3%synergy
Frantic Search
15%inclusion42 decks284 decks
-3%synergy
Otherworldly Gaze
14%inclusion41 decks284 decks
12%synergy
Thirst for Meaning
13%inclusion38 decks284 decks
12%synergy
Negate
11%inclusion31 decks284 decks
-6%synergy
Into the Flood Maw
11%inclusion31 decks284 decks
7%synergy
Gifts Ungiven
11%inclusion31 decks284 decks
9%synergy
Fell the Profane
9.2%inclusion26 decks284 decks
0%synergy
Brainstorm
8.8%inclusion25 decks284 decks
-8%synergy
Chain of Vapor
8.5%inclusion24 decks284 decks
5%synergy
Anguished Unmaking
8.5%inclusion24 decks284 decks
-17%synergy
Strix Serenade
7.7%inclusion22 decks284 decks
4%synergy
Retraction Helix
6.7%inclusion19 decks284 decks
6%synergy
Brain Freeze
6.7%inclusion19 decks284 decks
6%synergy
Faithful Mending
6.7%inclusion19 decks284 decks
3%synergy
Inkshield
6.7%inclusion19 decks284 decks
-3%synergy
Thought Scour
6.3%inclusion18 decks284 decks
5%synergy
Generous Gift
5.6%inclusion16 decks284 decks
-9%synergy
Sorceries
Reanimate
30%inclusion84 decks284 decks
14%synergy
Windfall
29%inclusion82 decks284 decks
15%synergy
Redress Fate
25%inclusion71 decks284 decks
19%synergy
Toxic Deluge
20%inclusion57 decks284 decks
0%synergy
Imperial Seal
19%inclusion53 decks284 decks
11%synergy
Singularity Rupture
17%inclusion17 decks98 decks
15%synergy
Dance of the Manse
16%inclusion45 decks284 decks
12%synergy
Space-Time Anomaly
15%inclusion14 decks95 decks
13%synergy
Glimpse the Unthinkable
13%inclusion38 decks284 decks
13%synergy
Damn
13%inclusion37 decks284 decks
-7%synergy
Demonic Counsel
12%inclusion35 decks284 decks
11%synergy
Lively Dirge
12%inclusion34 decks284 decks
11%synergy
Extinguish All Hope
11%inclusion31 decks284 decks
9%synergy
Unmarked Grave
8.5%inclusion24 decks284 decks
7%synergy
Resurgent Belief
8.1%inclusion23 decks284 decks
6%synergy
Breach the Multiverse
8.1%inclusion23 decks284 decks
6%synergy
Beseech the Mirror
7.4%inclusion21 decks284 decks
3%synergy
Traumatize
7.4%inclusion21 decks284 decks
7%synergy
Supreme Verdict
7.0%inclusion20 decks284 decks
-8%synergy
Idyllic Tutor
7.0%inclusion20 decks284 decks
3%synergy
Time Wipe
6.7%inclusion19 decks284 decks
0%synergy
Wrath of God
6.7%inclusion19 decks284 decks
3%synergy
Replenish
6.3%inclusion18 decks284 decks
5%synergy
Ponder
6.3%inclusion18 decks284 decks
-3%synergy
Cut Your Losses
6.3%inclusion18 decks284 decks
6%synergy
Maddening Cacophony
6.0%inclusion17 decks284 decks
5%synergy
Buried Alive
6.0%inclusion17 decks284 decks
2%synergy
Farewell
5.6%inclusion16 decks284 decks
-7%synergy
Utility Artifacts
Mesmeric Orb
28%inclusion79 decks284 decks
27%synergy
The One Ring
19%inclusion54 decks284 decks
6%synergy
Wishclaw Talisman
18%inclusion50 decks284 decks
9%synergy
Lightning Greaves
11%inclusion30 decks284 decks
-12%synergy
Cloud Key
6.7%inclusion19 decks284 decks
3%synergy
Wayfarer's Bauble
6.7%inclusion19 decks284 decks
-1%synergy
Altar of Dementia
6.3%inclusion18 decks284 decks
5%synergy
Mindcrank
6.0%inclusion17 decks284 decks
4%synergy
Enchantments
Amphibian Downpour
38%inclusion107 decks284 decks
33%synergy
Cemetery Tampering
35%inclusion98 decks284 decks
34%synergy
Propaganda
34%inclusion96 decks284 decks
7%synergy
Seal of Cleansing
31%inclusion89 decks284 decks
30%synergy
Sphere of Safety
31%inclusion87 decks284 decks
21%synergy
Secret Arcade // Dusty Parlor
30%inclusion86 decks284 decks
25%synergy
Grasp of Fate
30%inclusion85 decks284 decks
24%synergy
Ghostly Prison
28%inclusion79 decks284 decks
6%synergy
Starfield of Nyx
25%inclusion70 decks284 decks
21%synergy
Sigil of the Empty Throne
24%inclusion68 decks284 decks
18%synergy
Touch the Spirit Realm
24%inclusion68 decks284 decks
21%synergy
Out of the Tombs
24%inclusion67 decks284 decks
23%synergy
Estrid's Invocation
23%inclusion65 decks284 decks
18%synergy
Cacophony Unleashed
23%inclusion64 decks284 decks
21%synergy
The Meathook Massacre
22%inclusion63 decks284 decks
19%synergy
Necropotence
21%inclusion61 decks284 decks
15%synergy
Court of Cunning
21%inclusion60 decks284 decks
20%synergy
Static Prison
21%inclusion59 decks284 decks
20%synergy
Tinybones Joins Up
20%inclusion58 decks284 decks
19%synergy
Stillness in Motion
20%inclusion29 decks143 decks
20%synergy
Defiled Crypt // Cadaver Lab
20%inclusion57 decks282 decks
19%synergy
Seal of Removal
20%inclusion56 decks284 decks
19%synergy
Polluted Cistern // Dim Oubliette
19%inclusion55 decks283 decks
19%synergy
Monologue Tax
19%inclusion54 decks284 decks
13%synergy
The Tale of Tamiyo
18%inclusion52 decks284 decks
18%synergy
Greater Auramancy
17%inclusion48 decks284 decks
12%synergy
Black Market Connections
17%inclusion47 decks284 decks
2%synergy
Darksteel Mutation
16%inclusion46 decks284 decks
10%synergy
Copy Enchantment
15%inclusion42 decks284 decks
10%synergy
Phyrexian Arena
14%inclusion41 decks284 decks
0%synergy
Shark Typhoon
14%inclusion41 decks284 decks
9%synergy
All That Glitters
14%inclusion39 decks284 decks
5%synergy
Hallowed Haunting
13%inclusion38 decks284 decks
11%synergy
Chthonian Nightmare
13%inclusion37 decks284 decks
12%synergy
Ethereal Armor
13%inclusion37 decks284 decks
8%synergy
Secrets of the Dead
13%inclusion36 decks284 decks
12%synergy
Founding the Third Path
12%inclusion35 decks284 decks
12%synergy
Teval's Judgment
12%inclusion17 decks145 decks
11%synergy
Leyline of Anticipation
11%inclusion32 decks284 decks
7%synergy
Timely Ward
11%inclusion31 decks284 decks
6%synergy
Nowhere to Run
11%inclusion31 decks284 decks
10%synergy
Extravagant Replication
11%inclusion30 decks284 decks
6%synergy
Sheltered by Ghosts
11%inclusion30 decks284 decks
8%synergy
Imprisoned in the Moon
11%inclusion30 decks284 decks
4%synergy
Restricted Office // Lecture Hall
10%inclusion29 decks284 decks
8%synergy
Authority of the Consuls
10%inclusion28 decks284 decks
-2%synergy
Aura of Silence
10%inclusion28 decks284 decks
7%synergy
Copy Artifact
10%inclusion28 decks284 decks
9%synergy
Land Tax
9.2%inclusion26 decks284 decks
3%synergy
Trouble in Pairs
8.8%inclusion25 decks284 decks
3%synergy
Battles
Invasion of Theros
6.7%inclusion19 decks284 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
16%inclusion46 decks284 decks
8%synergy
Jace, Wielder of Mysteries
8.8%inclusion25 decks284 decks
7%synergy
Utility Lands
Hall of Heliod's Generosity
45%inclusion128 decks284 decks
32%synergy
Otawara, Soaring City
37%inclusion105 decks284 decks
18%synergy
Bojuka Bog
33%inclusion93 decks284 decks
6%synergy
Takenuma, Abandoned Mire
21%inclusion59 decks284 decks
14%synergy
Cephalid Coliseum
16%inclusion46 decks284 decks
13%synergy
Urza's Saga
16%inclusion45 decks284 decks
4%synergy
Reliquary Tower
13%inclusion37 decks284 decks
-21%synergy
Emergence Zone
11%inclusion32 decks284 decks
9%synergy
Urborg, Tomb of Yawgmoth
11%inclusion32 decks284 decks
-2%synergy
Nephalia Drownyard
11%inclusion30 decks284 decks
10%synergy
Serra's Sanctum
9.2%inclusion26 decks284 decks
7%synergy
Halimar Depths
7.4%inclusion21 decks284 decks
3%synergy
Minamo, School at Water's Edge
6.7%inclusion19 decks284 decks
3%synergy
Ishgard, the Holy See
5.9%inclusion7 decks118 decks
2%synergy
Rogue's Passage
5.6%inclusion16 decks284 decks
-4%synergy
Mana Artifacts
Arcane Signet
92%inclusion260 decks284 decks
4%synergy
Sol Ring
91%inclusion259 decks284 decks
1%synergy
Talisman of Dominance
61%inclusion172 decks284 decks
11%synergy
Talisman of Progress
52%inclusion147 decks284 decks
8%synergy
Talisman of Hierarchy
49%inclusion139 decks284 decks
5%synergy
Fellwar Stone
42%inclusion120 decks284 decks
9%synergy
Azorius Signet
27%inclusion76 decks284 decks
-5%synergy
Orzhov Signet
24%inclusion69 decks284 decks
-9%synergy
Lotus Petal
24%inclusion67 decks284 decks
13%synergy
Chrome Mox
23%inclusion64 decks284 decks
13%synergy
Dimir Signet
22%inclusion63 decks284 decks
-10%synergy
Mox Diamond
19%inclusion55 decks284 decks
12%synergy
Mox Opal
19%inclusion54 decks284 decks
10%synergy
Lion's Eye Diamond
17%inclusion47 decks284 decks
14%synergy
Mox Amber
10%inclusion28 decks284 decks
4%synergy
Mind Stone
10%inclusion27 decks284 decks
-3%synergy
Commander's Sphere
8.5%inclusion24 decks284 decks
-10%synergy
Grim Monolith
7.7%inclusion22 decks284 decks
4%synergy
Thought Vessel
7.4%inclusion21 decks284 decks
-17%synergy
Chromatic Lantern
5.3%inclusion15 decks284 decks
-8%synergy
Lands
Command Tower
96%inclusion274 decks284 decks
4%synergy
Island
86%inclusion243 decks284 decks
-7%synergy
Swamp
83%inclusion236 decks284 decks
-8%synergy
Plains
81%inclusion231 decks284 decks
-10%synergy
Exotic Orchard
60%inclusion170 decks284 decks
1%synergy
Hallowed Fountain
60%inclusion169 decks284 decks
10%synergy
Watery Grave
59%inclusion168 decks284 decks
9%synergy
Godless Shrine
58%inclusion164 decks284 decks
7%synergy
Polluted Delta
56%inclusion159 decks284 decks
18%synergy
Flooded Strand
56%inclusion159 decks284 decks
18%synergy
Marsh Flats
51%inclusion145 decks284 decks
15%synergy
Arcane Sanctum
45%inclusion129 decks284 decks
-9%synergy
Adarkar Wastes
44%inclusion126 decks284 decks
13%synergy
Caves of Koilos
41%inclusion117 decks284 decks
6%synergy
Undercity Sewers
40%inclusion114 decks284 decks
26%synergy
Sea of Clouds
40%inclusion113 decks284 decks
4%synergy
Morphic Pool
40%inclusion113 decks284 decks
6%synergy
Underground River
39%inclusion112 decks284 decks
6%synergy
Vault of Champions
39%inclusion110 decks284 decks
6%synergy
Raffine's Tower
38%inclusion109 decks284 decks
-3%synergy
Meticulous Archive
33%inclusion95 decks284 decks
20%synergy
Shadowy Backstreet
33%inclusion93 decks284 decks
20%synergy
Isolated Chapel
32%inclusion92 decks284 decks
-7%synergy
Glacial Fortress
29%inclusion83 decks284 decks
-12%synergy
Drowned Catacomb
29%inclusion83 decks284 decks
-7%synergy
Valgavoth's Lair
29%inclusion83 decks284 decks
26%synergy
City of Brass
27%inclusion77 decks284 decks
12%synergy
Mana Confluence
27%inclusion76 decks284 decks
13%synergy
Scrubland
25%inclusion72 decks284 decks
9%synergy
Underground Sea
25%inclusion71 decks284 decks
9%synergy
Tundra
25%inclusion71 decks284 decks
9%synergy
Bloodstained Mire
25%inclusion70 decks284 decks
14%synergy
Evolving Wilds
24%inclusion67 decks284 decks
-1%synergy
Verdant Catacombs
23%inclusion66 decks284 decks
13%synergy
Scalding Tarn
23%inclusion66 decks284 decks
12%synergy
Misty Rainforest
23%inclusion64 decks284 decks
11%synergy
Windswept Heath
23%inclusion64 decks284 decks
13%synergy
Gemstone Caverns
23%inclusion64 decks284 decks
15%synergy
Prairie Stream
22%inclusion63 decks284 decks
-19%synergy
Sunken Hollow
22%inclusion62 decks284 decks
-18%synergy
Temple of Deceit
21%inclusion60 decks284 decks
3%synergy
Temple of Silence
20%inclusion58 decks284 decks
1%synergy
Terramorphic Expanse
20%inclusion58 decks284 decks
4%synergy
Temple of Enlightenment
20%inclusion57 decks284 decks
4%synergy
Arid Mesa
19%inclusion55 decks284 decks
10%synergy
Contaminated Landscape
19%inclusion55 decks284 decks
5%synergy
Gloomlake Verge
19%inclusion53 decks284 decks
8%synergy
Shipwreck Marsh
18%inclusion51 decks284 decks
-3%synergy
Azorius Chancery
18%inclusion50 decks284 decks
3%synergy
Deserted Beach
18%inclusion50 decks284 decks
-3%synergy
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