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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Wan Shi Tong, Librarian
18%inclusion7 decks38 decks
13%synergy
Waterbender Ascension
3.3%inclusion1 decks30 decks
2%synergy
Airbender Ascension
2.6%inclusion1 decks38 decks
2%synergy
Path to Redemption
1.4%inclusion1 decks73 decks
1%synergy
High Synergy Cards
Ripples of Undeath
67%inclusion185 decks278 decks
64%synergy
Animate Dead
71%inclusion197 decks278 decks
61%synergy
Necromancy
60%inclusion168 decks278 decks
56%synergy
Dress Down
58%inclusion160 decks278 decks
55%synergy
Inquisitive Glimmer
58%inclusion161 decks278 decks
50%synergy
Scrabbling Skullcrab
45%inclusion125 decks278 decks
44%synergy
Entity Tracker
49%inclusion137 decks278 decks
43%synergy
Mesa Enchantress
51%inclusion142 decks278 decks
42%synergy
Gravebreaker Lamia
42%inclusion118 decks278 decks
41%synergy
Dance of the Dead
43%inclusion119 decks278 decks
41%synergy
Top Cards
Mystic Remora
62%inclusion171 decks278 decks
40%synergy
Swords to Plowshares
58%inclusion162 decks278 decks
-10%synergy
Sevinne's Reclamation
49%inclusion137 decks278 decks
40%synergy
Starfield Mystic
44%inclusion123 decks278 decks
38%synergy
Overlord of the Balemurk
42%inclusion118 decks278 decks
40%synergy
Entomb
42%inclusion117 decks278 decks
35%synergy
Demon of Fate's Design
41%inclusion115 decks278 decks
36%synergy
Dark Ritual
41%inclusion113 decks278 decks
21%synergy
Blind Obedience
40%inclusion110 decks278 decks
27%synergy
Amphibian Downpour
38%inclusion105 decks278 decks
33%synergy
Game Changers
Smothering Tithe
51%inclusion143 decks278 decks
19%synergy
Rhystic Study
47%inclusion131 decks278 decks
15%synergy
Enlightened Tutor
40%inclusion112 decks278 decks
20%synergy
Demonic Tutor
33%inclusion91 decks278 decks
11%synergy
Thassa's Oracle
31%inclusion87 decks278 decks
21%synergy
Vampiric Tutor
28%inclusion78 decks278 decks
10%synergy
Ancient Tomb
27%inclusion75 decks278 decks
14%synergy
Force of Will
25%inclusion69 decks278 decks
12%synergy
Mana Vault
24%inclusion68 decks278 decks
15%synergy
Chrome Mox
23%inclusion64 decks278 decks
13%synergy
Creatures
Doomwake Giant
38%inclusion105 decks278 decks
32%synergy
Overlord of the Floodpits
37%inclusion104 decks278 decks
34%synergy
Fear of Sleep Paralysis
35%inclusion98 decks278 decks
30%synergy
Abdel Adrian, Gorion's Ward
34%inclusion94 decks278 decks
32%synergy
Esper Sentinel
33%inclusion91 decks278 decks
5%synergy
Victor, Valgavoth's Seneschal
33%inclusion91 decks278 decks
31%synergy
Fear of Impostors
32%inclusion89 decks278 decks
30%synergy
Ondu Spiritdancer
29%inclusion81 decks278 decks
23%synergy
Lotho, Corrupt Shirriff
28%inclusion78 decks278 decks
11%synergy
Grand Abolisher
27%inclusion76 decks278 decks
13%synergy
Zur, Eternal Schemer
27%inclusion74 decks278 decks
23%synergy
Silent Hallcreeper
23%inclusion63 decks278 decks
18%synergy
Heliod, the Radiant Dawn
23%inclusion63 decks278 decks
19%synergy
Valley Floodcaller
22%inclusion62 decks278 decks
18%synergy
Zur the Enchanter
22%inclusion62 decks278 decks
17%synergy
Orcish Bowmasters
22%inclusion62 decks278 decks
11%synergy
Enduring Curiosity
22%inclusion61 decks278 decks
14%synergy
Ghostly Dancers
22%inclusion61 decks278 decks
19%synergy
Grim Guardian
21%inclusion59 decks278 decks
19%synergy
Hullbreaker Horror
20%inclusion56 decks278 decks
14%synergy
Mindwrack Harpy
19%inclusion53 decks278 decks
19%synergy
Displacer Kitten
19%inclusion53 decks278 decks
12%synergy
Hedron Crab
19%inclusion53 decks278 decks
18%synergy
Ranger-Captain of Eos
19%inclusion52 decks278 decks
12%synergy
Ledger Shredder
16%inclusion45 decks278 decks
7%synergy
Lurrus of the Dream-Den
16%inclusion44 decks278 decks
14%synergy
Archon of Sun's Grace
15%inclusion43 decks278 decks
11%synergy
Aminatou, Veil Piercer
15%inclusion43 decks278 decks
14%synergy
Alseid of Life's Bounty
15%inclusion43 decks278 decks
14%synergy
Sage of Mysteries
15%inclusion42 decks278 decks
15%synergy
Skullsnap Nuisance
15%inclusion42 decks278 decks
15%synergy
Voice of Victory
15%inclusion20 decks135 decks
7%synergy
Soaring Lightbringer
15%inclusion41 decks278 decks
10%synergy
Moon-Blessed Cleric
15%inclusion41 decks278 decks
10%synergy
Overlord of the Mistmoors
13%inclusion35 decks278 decks
10%synergy
Opposition Agent
12%inclusion33 decks278 decks
3%synergy
Balemurk Leech
12%inclusion32 decks278 decks
11%synergy
Mockingbird
12%inclusion32 decks278 decks
7%synergy
Spirited Companion
11%inclusion31 decks278 decks
9%synergy
Laboratory Maniac
11%inclusion31 decks278 decks
8%synergy
Drannith Magistrate
11%inclusion30 decks278 decks
3%synergy
Nashi, Searcher in the Dark
10%inclusion29 decks278 decks
10%synergy
The Mindskinner
10%inclusion28 decks278 decks
9%synergy
Athreos, Shroud-Veiled
10%inclusion28 decks278 decks
6%synergy
Stitcher's Supplier
10%inclusion27 decks278 decks
9%synergy
Archivist of Oghma
10%inclusion27 decks278 decks
3%synergy
Gremlin Tamer
10%inclusion27 decks278 decks
9%synergy
Ancient Cellarspawn
9.4%inclusion26 decks278 decks
6%synergy
Millikin
9.4%inclusion26 decks278 decks
9%synergy
Tataru Taru
9.3%inclusion10 decks107 decks
1%synergy
Instants
An Offer You Can't Refuse
34%inclusion94 decks278 decks
7%synergy
Counterspell
33%inclusion93 decks278 decks
-8%synergy
Swan Song
30%inclusion84 decks278 decks
11%synergy
Path to Exile
27%inclusion75 decks278 decks
-15%synergy
Arcane Denial
26%inclusion73 decks278 decks
6%synergy
Silence
24%inclusion68 decks278 decks
14%synergy
Fierce Guardianship
23%inclusion63 decks278 decks
2%synergy
Force of Negation
22%inclusion61 decks278 decks
10%synergy
Demonic Consultation
22%inclusion61 decks278 decks
14%synergy
Tainted Pact
21%inclusion57 decks278 decks
13%synergy
Flusterstorm
21%inclusion57 decks278 decks
12%synergy
Intuition
20%inclusion56 decks278 decks
18%synergy
Cyclonic Rift
20%inclusion56 decks278 decks
-4%synergy
Mental Misstep
19%inclusion54 decks278 decks
12%synergy
Mystical Tutor
19%inclusion54 decks278 decks
8%synergy
Borne Upon a Wind
19%inclusion52 decks278 decks
14%synergy
Pact of Negation
19%inclusion52 decks278 decks
11%synergy
Mindbreak Trap
19%inclusion52 decks278 decks
12%synergy
Cabal Ritual
18%inclusion51 decks278 decks
15%synergy
Void Rend
17%inclusion48 decks278 decks
-16%synergy
Dovin's Veto
17%inclusion47 decks278 decks
-8%synergy
Sink into Stupor
16%inclusion45 decks278 decks
4%synergy
Otherworldly Gaze
15%inclusion43 decks278 decks
13%synergy
Mana Drain
15%inclusion42 decks278 decks
-2%synergy
Thirst for Meaning
15%inclusion41 decks278 decks
13%synergy
Frantic Search
14%inclusion39 decks278 decks
-3%synergy
Gifts Ungiven
11%inclusion31 decks278 decks
9%synergy
Negate
11%inclusion30 decks278 decks
-6%synergy
Into the Flood Maw
10%inclusion29 decks278 decks
7%synergy
Fell the Profane
9.4%inclusion26 decks278 decks
1%synergy
Chain of Vapor
9.0%inclusion25 decks278 decks
6%synergy
Brainstorm
9.0%inclusion25 decks278 decks
-8%synergy
Anguished Unmaking
8.3%inclusion23 decks278 decks
-16%synergy
Strix Serenade
7.6%inclusion21 decks278 decks
4%synergy
Faithful Mending
7.2%inclusion20 decks278 decks
3%synergy
Brain Freeze
6.8%inclusion19 decks278 decks
6%synergy
Thought Scour
6.8%inclusion19 decks278 decks
6%synergy
Retraction Helix
6.8%inclusion19 decks278 decks
6%synergy
Inkshield
6.5%inclusion18 decks278 decks
-3%synergy
Generous Gift
5.8%inclusion16 decks278 decks
-9%synergy
Sorceries
Reanimate
29%inclusion81 decks278 decks
13%synergy
Windfall
28%inclusion78 decks278 decks
14%synergy
Redress Fate
25%inclusion70 decks278 decks
19%synergy
Toxic Deluge
19%inclusion54 decks278 decks
0%synergy
Imperial Seal
19%inclusion53 decks278 decks
11%synergy
Dance of the Manse
16%inclusion45 decks278 decks
13%synergy
Singularity Rupture
15%inclusion13 decks86 decks
13%synergy
Glimpse the Unthinkable
13%inclusion37 decks278 decks
13%synergy
Space-Time Anomaly
13%inclusion11 decks83 decks
11%synergy
Damn
13%inclusion36 decks278 decks
-7%synergy
Demonic Counsel
13%inclusion35 decks278 decks
11%synergy
Lively Dirge
11%inclusion31 decks278 decks
10%synergy
Extinguish All Hope
11%inclusion31 decks278 decks
9%synergy
Breach the Multiverse
8.6%inclusion24 decks278 decks
6%synergy
Resurgent Belief
8.3%inclusion23 decks278 decks
6%synergy
Unmarked Grave
8.3%inclusion23 decks278 decks
7%synergy
Traumatize
7.6%inclusion21 decks278 decks
7%synergy
Beseech the Mirror
7.2%inclusion20 decks278 decks
3%synergy
Idyllic Tutor
7.2%inclusion20 decks278 decks
3%synergy
Supreme Verdict
6.8%inclusion19 decks278 decks
-8%synergy
Replenish
6.8%inclusion19 decks278 decks
5%synergy
Wrath of God
6.5%inclusion18 decks278 decks
2%synergy
Ponder
6.5%inclusion18 decks278 decks
-3%synergy
Time Wipe
6.5%inclusion18 decks278 decks
-1%synergy
Cut Your Losses
6.1%inclusion17 decks278 decks
6%synergy
Maddening Cacophony
6.1%inclusion17 decks278 decks
5%synergy
Buried Alive
5.8%inclusion16 decks278 decks
2%synergy
Farewell
5.8%inclusion16 decks278 decks
-7%synergy
Mnemonic Betrayal
5.0%inclusion14 decks278 decks
2%synergy
Diabolic Intent
5.0%inclusion14 decks278 decks
0%synergy
Utility Artifacts
Mesmeric Orb
29%inclusion80 decks278 decks
28%synergy
The One Ring
20%inclusion56 decks278 decks
6%synergy
Wishclaw Talisman
18%inclusion51 decks278 decks
10%synergy
Lightning Greaves
11%inclusion31 decks278 decks
-11%synergy
Cloud Key
6.8%inclusion19 decks278 decks
4%synergy
Wayfarer's Bauble
6.5%inclusion18 decks278 decks
-2%synergy
Mindcrank
6.5%inclusion18 decks278 decks
4%synergy
Altar of Dementia
6.5%inclusion18 decks278 decks
5%synergy
Perpetual Timepiece
5.0%inclusion14 decks278 decks
5%synergy
Enchantments
Mirrormade
37%inclusion104 decks278 decks
28%synergy
Cemetery Tampering
35%inclusion98 decks278 decks
35%synergy
Propaganda
34%inclusion95 decks278 decks
8%synergy
Sphere of Safety
31%inclusion87 decks278 decks
22%synergy
Seal of Cleansing
31%inclusion86 decks278 decks
29%synergy
Secret Arcade // Dusty Parlor
31%inclusion85 decks278 decks
25%synergy
Grasp of Fate
29%inclusion81 decks278 decks
23%synergy
Ghostly Prison
28%inclusion79 decks278 decks
7%synergy
Starfield of Nyx
25%inclusion70 decks278 decks
21%synergy
Sigil of the Empty Throne
24%inclusion68 decks278 decks
18%synergy
Out of the Tombs
24%inclusion67 decks278 decks
24%synergy
Touch the Spirit Realm
24%inclusion67 decks278 decks
22%synergy
The Meathook Massacre
23%inclusion63 decks278 decks
19%synergy
Estrid's Invocation
23%inclusion63 decks278 decks
18%synergy
Necropotence
22%inclusion61 decks278 decks
15%synergy
Cacophony Unleashed
22%inclusion60 decks278 decks
20%synergy
Tinybones Joins Up
21%inclusion59 decks278 decks
20%synergy
Stillness in Motion
21%inclusion28 decks133 decks
21%synergy
Court of Cunning
21%inclusion58 decks278 decks
20%synergy
Static Prison
21%inclusion57 decks278 decks
20%synergy
Seal of Removal
20%inclusion56 decks278 decks
20%synergy
The Tale of Tamiyo
20%inclusion55 decks278 decks
19%synergy
Defiled Crypt // Cadaver Lab
20%inclusion54 decks276 decks
19%synergy
Polluted Cistern // Dim Oubliette
19%inclusion53 decks277 decks
19%synergy
Monologue Tax
18%inclusion51 decks278 decks
12%synergy
Black Market Connections
18%inclusion50 decks278 decks
4%synergy
Greater Auramancy
17%inclusion47 decks278 decks
12%synergy
Darksteel Mutation
16%inclusion44 decks278 decks
9%synergy
Shark Typhoon
15%inclusion43 decks278 decks
10%synergy
Phyrexian Arena
15%inclusion42 decks278 decks
1%synergy
Copy Enchantment
14%inclusion40 decks278 decks
10%synergy
Secrets of the Dead
13%inclusion37 decks278 decks
13%synergy
All That Glitters
13%inclusion37 decks278 decks
4%synergy
Hallowed Haunting
13%inclusion37 decks278 decks
11%synergy
Chthonian Nightmare
13%inclusion36 decks278 decks
12%synergy
Founding the Third Path
12%inclusion33 decks278 decks
12%synergy
Leyline of Anticipation
12%inclusion33 decks278 decks
7%synergy
Ethereal Armor
12%inclusion33 decks278 decks
7%synergy
Imprisoned in the Moon
12%inclusion32 decks278 decks
5%synergy
Extravagant Replication
11%inclusion31 decks278 decks
6%synergy
Sheltered by Ghosts
11%inclusion30 decks278 decks
8%synergy
Nowhere to Run
11%inclusion30 decks278 decks
10%synergy
Timely Ward
10%inclusion29 decks278 decks
5%synergy
Teval's Judgment
10%inclusion14 decks135 decks
10%synergy
Copy Artifact
10%inclusion28 decks278 decks
9%synergy
Aura of Silence
10%inclusion28 decks278 decks
7%synergy
Authority of the Consuls
10%inclusion27 decks278 decks
-1%synergy
Land Tax
9.4%inclusion26 decks278 decks
3%synergy
Restricted Office // Lecture Hall
9.4%inclusion26 decks278 decks
7%synergy
Trouble in Pairs
9.4%inclusion26 decks278 decks
4%synergy
Battles
Invasion of Theros
6.8%inclusion19 decks278 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
17%inclusion47 decks278 decks
9%synergy
Jace, Wielder of Mysteries
9.0%inclusion25 decks278 decks
7%synergy
Utility Lands
Hall of Heliod's Generosity
46%inclusion128 decks278 decks
33%synergy
Otawara, Soaring City
38%inclusion105 decks278 decks
19%synergy
Bojuka Bog
33%inclusion91 decks278 decks
5%synergy
Takenuma, Abandoned Mire
21%inclusion57 decks278 decks
14%synergy
Urza's Saga
17%inclusion46 decks278 decks
5%synergy
Cephalid Coliseum
16%inclusion45 decks278 decks
13%synergy
Reliquary Tower
13%inclusion37 decks278 decks
-20%synergy
Urborg, Tomb of Yawgmoth
12%inclusion33 decks278 decks
-1%synergy
Emergence Zone
12%inclusion32 decks278 decks
9%synergy
Nephalia Drownyard
11%inclusion30 decks278 decks
10%synergy
Serra's Sanctum
10%inclusion27 decks278 decks
8%synergy
Halimar Depths
7.6%inclusion21 decks278 decks
3%synergy
Minamo, School at Water's Edge
7.2%inclusion20 decks278 decks
3%synergy
Ishgard, the Holy See
6.5%inclusion7 decks107 decks
3%synergy
Rogue's Passage
5.4%inclusion15 decks278 decks
-4%synergy
Mana Artifacts
Arcane Signet
92%inclusion255 decks278 decks
4%synergy
Sol Ring
92%inclusion255 decks278 decks
2%synergy
Talisman of Dominance
61%inclusion169 decks278 decks
12%synergy
Talisman of Progress
52%inclusion145 decks278 decks
9%synergy
Talisman of Hierarchy
49%inclusion136 decks278 decks
6%synergy
Fellwar Stone
43%inclusion120 decks278 decks
9%synergy
Azorius Signet
26%inclusion73 decks278 decks
-6%synergy
Lotus Petal
24%inclusion67 decks278 decks
13%synergy
Orzhov Signet
24%inclusion67 decks278 decks
-11%synergy
Dimir Signet
22%inclusion61 decks278 decks
-11%synergy
Mox Opal
20%inclusion55 decks278 decks
11%synergy
Mox Diamond
20%inclusion55 decks278 decks
12%synergy
Lion's Eye Diamond
17%inclusion47 decks278 decks
15%synergy
Mox Amber
10%inclusion28 decks278 decks
4%synergy
Mind Stone
10%inclusion27 decks278 decks
-3%synergy
Commander's Sphere
8.6%inclusion24 decks278 decks
-11%synergy
Grim Monolith
8.6%inclusion24 decks278 decks
5%synergy
Thought Vessel
7.6%inclusion21 decks278 decks
-17%synergy
Chromatic Lantern
5.4%inclusion15 decks278 decks
-8%synergy
Lands
Command Tower
97%inclusion269 decks278 decks
4%synergy
Island
85%inclusion237 decks278 decks
-7%synergy
Swamp
83%inclusion230 decks278 decks
-8%synergy
Plains
81%inclusion225 decks278 decks
-10%synergy
Hallowed Fountain
60%inclusion166 decks278 decks
11%synergy
Watery Grave
59%inclusion165 decks278 decks
10%synergy
Exotic Orchard
59%inclusion164 decks278 decks
1%synergy
Godless Shrine
58%inclusion161 decks278 decks
8%synergy
Flooded Strand
56%inclusion156 decks278 decks
18%synergy
Polluted Delta
56%inclusion155 decks278 decks
19%synergy
Marsh Flats
51%inclusion143 decks278 decks
15%synergy
Arcane Sanctum
45%inclusion125 decks278 decks
-10%synergy
Adarkar Wastes
44%inclusion121 decks278 decks
13%synergy
Morphic Pool
41%inclusion114 decks278 decks
7%synergy
Sea of Clouds
41%inclusion114 decks278 decks
5%synergy
Undercity Sewers
41%inclusion113 decks278 decks
27%synergy
Caves of Koilos
41%inclusion113 decks278 decks
5%synergy
Vault of Champions
40%inclusion111 decks278 decks
7%synergy
Underground River
39%inclusion108 decks278 decks
6%synergy
Raffine's Tower
38%inclusion106 decks278 decks
-3%synergy
Meticulous Archive
33%inclusion92 decks278 decks
20%synergy
Shadowy Backstreet
32%inclusion90 decks278 decks
20%synergy
Isolated Chapel
32%inclusion88 decks278 decks
-7%synergy
Valgavoth's Lair
29%inclusion81 decks278 decks
26%synergy
Drowned Catacomb
28%inclusion79 decks278 decks
-7%synergy
Glacial Fortress
28%inclusion78 decks278 decks
-12%synergy
Mana Confluence
28%inclusion77 decks278 decks
14%synergy
City of Brass
28%inclusion77 decks278 decks
13%synergy
Scrubland
26%inclusion73 decks278 decks
10%synergy
Tundra
26%inclusion72 decks278 decks
10%synergy
Underground Sea
26%inclusion72 decks278 decks
10%synergy
Bloodstained Mire
25%inclusion69 decks278 decks
14%synergy
Verdant Catacombs
23%inclusion65 decks278 decks
13%synergy
Evolving Wilds
23%inclusion65 decks278 decks
-2%synergy
Scalding Tarn
23%inclusion65 decks278 decks
12%synergy
Misty Rainforest
23%inclusion64 decks278 decks
12%synergy
Gemstone Caverns
23%inclusion64 decks278 decks
15%synergy
Windswept Heath
23%inclusion63 decks278 decks
13%synergy
Prairie Stream
22%inclusion61 decks278 decks
-19%synergy
Sunken Hollow
22%inclusion60 decks278 decks
-18%synergy
Temple of Deceit
21%inclusion58 decks278 decks
3%synergy
Terramorphic Expanse
21%inclusion57 decks278 decks
4%synergy
Arid Mesa
20%inclusion56 decks278 decks
10%synergy
Temple of Silence
20%inclusion56 decks278 decks
0%synergy
Temple of Enlightenment
20%inclusion55 decks278 decks
3%synergy
Contaminated Landscape
19%inclusion53 decks278 decks
4%synergy
Gloomlake Verge
19%inclusion52 decks278 decks
8%synergy
Shipwreck Marsh
18%inclusion51 decks278 decks
-2%synergy
Deserted Beach
18%inclusion49 decks278 decks
-3%synergy
Azorius Chancery
17%inclusion48 decks278 decks
3%synergy
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