The Master of Keys (Commander) - Self-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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The Rise of Sozin
4.9%inclusion3 decks61 decks
5%synergy
Aang's Iceberg
3.3%inclusion2 decks61 decks
3%synergy
Northern Air Temple
2.4%inclusion1 decks42 decks
2%synergy
The Spirit Oasis
2.4%inclusion1 decks42 decks
2%synergy
Airbender Ascension
2.3%inclusion1 decks43 decks
2%synergy
High Synergy Cards
Inquisitive Glimmer
78%inclusion102 decks130 decks
71%synergy
Ripples of Undeath
72%inclusion94 decks130 decks
70%synergy
Mesa Enchantress
73%inclusion95 decks130 decks
64%synergy
Gravebreaker Lamia
61%inclusion79 decks130 decks
60%synergy
Entity Tracker
64%inclusion83 decks130 decks
57%synergy
Starfield Mystic
64%inclusion83 decks130 decks
57%synergy
Hall of Heliod's Generosity
66%inclusion86 decks130 decks
53%synergy
Demon of Fate's Design
58%inclusion76 decks130 decks
53%synergy
Scrabbling Skullcrab
52%inclusion68 decks130 decks
51%synergy
Animate Dead
61%inclusion79 decks130 decks
51%synergy
Top Cards
Doomwake Giant
56%inclusion73 decks130 decks
50%synergy
Fear of Sleep Paralysis
55%inclusion72 decks130 decks
50%synergy
Overlord of the Floodpits
49%inclusion64 decks130 decks
45%synergy
Mystic Remora
47%inclusion61 decks130 decks
26%synergy
Overlord of the Balemurk
46%inclusion60 decks130 decks
44%synergy
Dress Down
46%inclusion60 decks130 decks
44%synergy
Sphere of Safety
45%inclusion59 decks130 decks
36%synergy
Necromancy
45%inclusion58 decks130 decks
40%synergy
Starfield of Nyx
45%inclusion58 decks130 decks
41%synergy
Swords to Plowshares
44%inclusion57 decks130 decks
-24%synergy
Game Changers
Smothering Tithe
42%inclusion54 decks130 decks
9%synergy
Rhystic Study
35%inclusion46 decks130 decks
3%synergy
Enlightened Tutor
18%inclusion23 decks130 decks
-2%synergy
Demonic Tutor
15%inclusion20 decks130 decks
-6%synergy
Necropotence
15%inclusion20 decks130 decks
9%synergy
Thassa's Oracle
13%inclusion17 decks130 decks
3%synergy
Mystical Tutor
12%inclusion16 decks130 decks
1%synergy
Fierce Guardianship
12%inclusion15 decks130 decks
-9%synergy
Vampiric Tutor
12%inclusion15 decks130 decks
-6%synergy
Cyclonic Rift
10%inclusion13 decks130 decks
-14%synergy
Creatures
Ondu Spiritdancer
42%inclusion55 decks130 decks
36%synergy
Fear of Impostors
42%inclusion54 decks130 decks
40%synergy
Zur, Eternal Schemer
42%inclusion54 decks130 decks
38%synergy
Victor, Valgavoth's Seneschal
40%inclusion52 decks130 decks
38%synergy
Zur the Enchanter
35%inclusion45 decks130 decks
29%synergy
Ghostly Dancers
31%inclusion40 decks130 decks
28%synergy
Silent Hallcreeper
28%inclusion36 decks130 decks
23%synergy
Enduring Curiosity
27%inclusion35 decks130 decks
19%synergy
Heliod, the Radiant Dawn
25%inclusion33 decks130 decks
22%synergy
Aminatou, Veil Piercer
24%inclusion31 decks130 decks
22%synergy
Mindwrack Harpy
23%inclusion30 decks130 decks
23%synergy
Soaring Lightbringer
23%inclusion30 decks130 decks
18%synergy
Grim Guardian
22%inclusion29 decks130 decks
20%synergy
Archon of Sun's Grace
21%inclusion27 decks130 decks
16%synergy
Sage of Mysteries
21%inclusion27 decks130 decks
20%synergy
Moon-Blessed Cleric
18%inclusion24 decks130 decks
14%synergy
Alseid of Life's Bounty
18%inclusion23 decks130 decks
16%synergy
Overlord of the Mistmoors
17%inclusion22 decks130 decks
15%synergy
Abdel Adrian, Gorion's Ward
16%inclusion21 decks130 decks
14%synergy
Skullsnap Nuisance
15%inclusion20 decks130 decks
15%synergy
Archetype of Imagination
15%inclusion20 decks130 decks
11%synergy
Hedron Crab
15%inclusion19 decks130 decks
14%synergy
Athreos, Shroud-Veiled
15%inclusion19 decks130 decks
10%synergy
Ancient Cellarspawn
15%inclusion19 decks130 decks
11%synergy
Starnheim Courser
14%inclusion18 decks130 decks
10%synergy
Esper Sentinel
14%inclusion18 decks130 decks
-14%synergy
Gremlin Tamer
14%inclusion18 decks130 decks
13%synergy
Balemurk Leech
13%inclusion17 decks130 decks
12%synergy
Grand Abolisher
12%inclusion16 decks130 decks
-2%synergy
Summon: Bahamut
12%inclusion9 decks75 decks
11%synergy
Nashi, Searcher in the Dark
12%inclusion15 decks130 decks
11%synergy
Phenax, God of Deception
11%inclusion14 decks130 decks
10%synergy
Lotho, Corrupt Shirriff
11%inclusion14 decks130 decks
-6%synergy
Emet-Selch of the Third Seat
11%inclusion8 decks75 decks
1%synergy
Summon: Yojimbo
11%inclusion8 decks75 decks
10%synergy
Spirited Companion
10%inclusion13 decks130 decks
8%synergy
Hullbreaker Horror
10%inclusion13 decks130 decks
4%synergy
Witch Enchanter
9.2%inclusion12 decks130 decks
2%synergy
Stenn, Paranoid Partisan
9.2%inclusion12 decks130 decks
8%synergy
Valley Floodcaller
9.2%inclusion12 decks130 decks
5%synergy
Fear of Surveillance
9.2%inclusion12 decks130 decks
9%synergy
Laboratory Maniac
9.2%inclusion12 decks130 decks
6%synergy
Fear of Infinity
8.5%inclusion11 decks130 decks
8%synergy
Displacer Kitten
8.5%inclusion11 decks130 decks
1%synergy
Valgavoth, Terror Eater
8.5%inclusion11 decks130 decks
5%synergy
Stitcher's Supplier
8.5%inclusion11 decks130 decks
8%synergy
Auramancer
7.7%inclusion10 decks130 decks
5%synergy
Ledger Shredder
7.7%inclusion10 decks130 decks
-1%synergy
Neerdiv, Devious Diver
7.1%inclusion8 decks112 decks
7%synergy
Millikin
6.9%inclusion9 decks130 decks
6%synergy
Instants
Counterspell
31%inclusion40 decks130 decks
-10%synergy
Entomb
27%inclusion35 decks130 decks
20%synergy
Path to Exile
26%inclusion34 decks130 decks
-16%synergy
Dark Ritual
23%inclusion30 decks130 decks
4%synergy
Void Rend
22%inclusion29 decks130 decks
-11%synergy
Arcane Denial
22%inclusion29 decks130 decks
2%synergy
An Offer You Can't Refuse
20%inclusion26 decks130 decks
-7%synergy
Otherworldly Gaze
14%inclusion18 decks130 decks
12%synergy
Inkshield
13%inclusion17 decks130 decks
4%synergy
Dovin's Veto
12%inclusion16 decks130 decks
-13%synergy
Thirst for Meaning
12%inclusion16 decks130 decks
11%synergy
Frantic Search
12%inclusion15 decks130 decks
-6%synergy
Negate
12%inclusion15 decks130 decks
-5%synergy
Silence
12%inclusion15 decks130 decks
1%synergy
Cabal Ritual
9.2%inclusion12 decks130 decks
6%synergy
Swan Song
9.2%inclusion12 decks130 decks
-10%synergy
Faithful Mending
9.2%inclusion12 decks130 decks
5%synergy
Demonic Consultation
7.7%inclusion10 decks130 decks
-1%synergy
Anguished Unmaking
7.7%inclusion10 decks130 decks
-17%synergy
Fell the Profane
6.9%inclusion9 decks130 decks
-2%synergy
Mindbreak Trap
6.9%inclusion9 decks130 decks
0%synergy
Sink into Stupor
6.9%inclusion9 decks130 decks
-6%synergy
Fact or Fiction
6.2%inclusion8 decks130 decks
2%synergy
Flusterstorm
6.2%inclusion8 decks130 decks
-2%synergy
Mana Drain
6.2%inclusion8 decks130 decks
-11%synergy
Brainstorm
5.4%inclusion7 decks130 decks
-12%synergy
Thought Scour
5.4%inclusion7 decks130 decks
4%synergy
Force of Will
5.4%inclusion7 decks130 decks
-7%synergy
Force of Negation
5.4%inclusion7 decks130 decks
-6%synergy
Get Out
5.4%inclusion7 decks130 decks
5%synergy
Utter End
5.4%inclusion7 decks130 decks
-2%synergy
Borne Upon a Wind
5.4%inclusion7 decks130 decks
1%synergy
Withering Torment
5.4%inclusion7 decks130 decks
4%synergy
Tainted Pact
5.4%inclusion7 decks130 decks
-2%synergy
Sorceries
Sevinne's Reclamation
42%inclusion54 decks130 decks
33%synergy
Redress Fate
32%inclusion42 decks130 decks
26%synergy
Windfall
22%inclusion29 decks130 decks
9%synergy
Reanimate
19%inclusion25 decks130 decks
3%synergy
Toxic Deluge
19%inclusion25 decks130 decks
0%synergy
Dance of the Manse
19%inclusion25 decks130 decks
16%synergy
Singularity Rupture
18%inclusion12 decks67 decks
16%synergy
Extinguish All Hope
18%inclusion23 decks130 decks
16%synergy
Resurgent Belief
16%inclusion21 decks130 decks
14%synergy
Space-Time Anomaly
14%inclusion9 decks63 decks
13%synergy
Time Wipe
12%inclusion16 decks130 decks
5%synergy
Glimpse the Unthinkable
12%inclusion16 decks130 decks
12%synergy
Idyllic Tutor
12%inclusion15 decks130 decks
7%synergy
Brilliant Restoration
10%inclusion13 decks130 decks
8%synergy
Austere Command
9.2%inclusion12 decks130 decks
0%synergy
Replenish
9.2%inclusion12 decks130 decks
7%synergy
Demonic Counsel
9.2%inclusion12 decks130 decks
8%synergy
Traumatize
8.5%inclusion11 decks130 decks
8%synergy
Supreme Verdict
7.7%inclusion10 decks130 decks
-7%synergy
Damn
7.7%inclusion10 decks130 decks
-13%synergy
Ponder
6.2%inclusion8 decks130 decks
-3%synergy
Buried Alive
6.2%inclusion8 decks130 decks
2%synergy
Imperial Seal
5.4%inclusion7 decks130 decks
-2%synergy
Feed the Swarm
5.4%inclusion7 decks130 decks
2%synergy
Utility Artifacts
Mesmeric Orb
21%inclusion27 decks130 decks
20%synergy
Lightning Greaves
11%inclusion14 decks130 decks
-12%synergy
Cloud Key
10%inclusion13 decks130 decks
7%synergy
Wayfarer's Bauble
8.5%inclusion11 decks130 decks
0%synergy
The One Ring
7.7%inclusion10 decks130 decks
-6%synergy
Keys to the House
7.7%inclusion10 decks130 decks
7%synergy
Perpetual Timepiece
6.9%inclusion9 decks130 decks
7%synergy
Crucible of Worlds
6.2%inclusion8 decks130 decks
5%synergy
Wishclaw Talisman
6.2%inclusion8 decks130 decks
-2%synergy
Swiftfoot Boots
6.2%inclusion8 decks130 decks
-18%synergy
Enchantments
Secret Arcade // Dusty Parlor
43%inclusion56 decks130 decks
38%synergy
Propaganda
42%inclusion55 decks130 decks
16%synergy
Cemetery Tampering
41%inclusion53 decks130 decks
40%synergy
Seal of Cleansing
40%inclusion52 decks130 decks
38%synergy
Ghostly Prison
40%inclusion52 decks130 decks
18%synergy
Sigil of the Empty Throne
38%inclusion50 decks130 decks
33%synergy
Mirrormade
36%inclusion47 decks130 decks
26%synergy
Grasp of Fate
35%inclusion46 decks130 decks
29%synergy
Stillness in Motion
35%inclusion29 decks84 decks
34%synergy
Blind Obedience
30%inclusion39 decks130 decks
18%synergy
Amphibian Downpour
29%inclusion38 decks130 decks
25%synergy
Darksteel Mutation
28%inclusion37 decks130 decks
22%synergy
Court of Cunning
28%inclusion37 decks130 decks
27%synergy
Estrid's Invocation
28%inclusion36 decks130 decks
23%synergy
Polluted Cistern // Dim Oubliette
26%inclusion34 decks130 decks
26%synergy
Defiled Crypt // Cadaver Lab
26%inclusion34 decks130 decks
25%synergy
Dance of the Dead
25%inclusion32 decks130 decks
22%synergy
Cacophony Unleashed
25%inclusion32 decks130 decks
23%synergy
The Tale of Tamiyo
25%inclusion32 decks130 decks
24%synergy
Phyrexian Arena
23%inclusion30 decks130 decks
9%synergy
Monologue Tax
22%inclusion28 decks130 decks
15%synergy
All That Glitters
21%inclusion27 decks130 decks
12%synergy
Extravagant Replication
20%inclusion26 decks130 decks
15%synergy
Shark Typhoon
20%inclusion26 decks130 decks
14%synergy
Bottomless Pool // Locker Room
20%inclusion26 decks130 decks
18%synergy
Ethereal Armor
20%inclusion26 decks130 decks
15%synergy
Out of the Tombs
19%inclusion25 decks130 decks
19%synergy
Restricted Office // Lecture Hall
19%inclusion25 decks130 decks
17%synergy
Black Market Connections
19%inclusion25 decks130 decks
5%synergy
Central Elevator // Promising Stairs
18%inclusion24 decks130 decks
18%synergy
Sheltered by Ghosts
18%inclusion24 decks130 decks
16%synergy
Copy Enchantment
18%inclusion23 decks130 decks
13%synergy
Greater Auramancy
18%inclusion23 decks130 decks
13%synergy
Mirror Room // Fractured Realm
18%inclusion23 decks130 decks
15%synergy
Seal of Removal
18%inclusion23 decks130 decks
17%synergy
Teval's Judgment
17%inclusion15 decks88 decks
16%synergy
Timely Ward
16%inclusion21 decks130 decks
11%synergy
Hallowed Haunting
16%inclusion21 decks130 decks
14%synergy
The Meathook Massacre
15%inclusion20 decks130 decks
12%synergy
Underwater Tunnel // Slimy Aquarium
15%inclusion20 decks130 decks
15%synergy
Imprisoned in the Moon
15%inclusion20 decks130 decks
9%synergy
Touch the Spirit Realm
15%inclusion19 decks130 decks
12%synergy
Meat Locker // Drowned Diner
14%inclusion18 decks127 decks
14%synergy
Cramped Vents // Access Maze
14%inclusion18 decks130 decks
11%synergy
Dazzling Theater // Prop Room
14%inclusion18 decks130 decks
12%synergy
Derelict Attic // Widow's Walk
13%inclusion16 decks127 decks
12%synergy
Funeral Room // Awakening Hall
12%inclusion16 decks130 decks
11%synergy
Virtue of Persistence
12%inclusion16 decks130 decks
10%synergy
The Eldest Reborn
12%inclusion15 decks130 decks
9%synergy
Secrets of the Dead
12%inclusion15 decks130 decks
11%synergy
Battles
Invasion of Theros
10%inclusion13 decks130 decks
8%synergy
Planeswalkers
Ashiok, Dream Render
6.9%inclusion9 decks130 decks
5%synergy
Teferi, Time Raveler
6.9%inclusion9 decks130 decks
-1%synergy
Utility Lands
Bojuka Bog
35%inclusion45 decks130 decks
7%synergy
Otawara, Soaring City
18%inclusion23 decks130 decks
-1%synergy
Takenuma, Abandoned Mire
15%inclusion19 decks130 decks
8%synergy
Reliquary Tower
15%inclusion19 decks130 decks
-19%synergy
Cephalid Coliseum
15%inclusion19 decks130 decks
11%synergy
Halimar Depths
11%inclusion14 decks130 decks
6%synergy
Nephalia Drownyard
11%inclusion14 decks130 decks
10%synergy
Urborg, Tomb of Yawgmoth
8.5%inclusion11 decks130 decks
-5%synergy
Ancient Tomb
8.5%inclusion11 decks130 decks
-5%synergy
Temple of the False God
7.7%inclusion10 decks130 decks
0%synergy
Urza's Saga
7.7%inclusion10 decks130 decks
-4%synergy
Serra's Sanctum
6.9%inclusion9 decks130 decks
5%synergy
Ishgard, the Holy See
6.7%inclusion5 decks75 decks
3%synergy
Dakmor Salvage
5.4%inclusion7 decks130 decks
5%synergy
Mana Artifacts
Sol Ring
90%inclusion117 decks130 decks
0%synergy
Arcane Signet
87%inclusion113 decks130 decks
-1%synergy
Talisman of Dominance
48%inclusion62 decks130 decks
-1%synergy
Talisman of Progress
42%inclusion54 decks130 decks
-1%synergy
Talisman of Hierarchy
37%inclusion48 decks130 decks
-6%synergy
Azorius Signet
32%inclusion42 decks130 decks
0%synergy
Orzhov Signet
32%inclusion41 decks130 decks
-3%synergy
Dimir Signet
26%inclusion34 decks130 decks
-6%synergy
Fellwar Stone
25%inclusion32 decks130 decks
-9%synergy
Mind Stone
15%inclusion19 decks130 decks
2%synergy
Commander's Sphere
9.2%inclusion12 decks130 decks
-10%synergy
Mana Vault
7.7%inclusion10 decks130 decks
-2%synergy
Lotus Petal
6.2%inclusion8 decks130 decks
-5%synergy
Chromatic Lantern
5.4%inclusion7 decks130 decks
-8%synergy
Lands
Island
96%inclusion125 decks130 decks
4%synergy
Plains
95%inclusion123 decks130 decks
3%synergy
Command Tower
94%inclusion122 decks130 decks
1%synergy
Swamp
94%inclusion122 decks130 decks
3%synergy
Arcane Sanctum
62%inclusion80 decks130 decks
7%synergy
Caves of Koilos
58%inclusion75 decks130 decks
22%synergy
Underground River
51%inclusion66 decks130 decks
18%synergy
Adarkar Wastes
51%inclusion66 decks130 decks
20%synergy
Exotic Orchard
49%inclusion64 decks130 decks
-9%synergy
Glacial Fortress
42%inclusion54 decks130 decks
2%synergy
Valgavoth's Lair
38%inclusion49 decks130 decks
35%synergy
Hallowed Fountain
38%inclusion49 decks130 decks
-11%synergy
Godless Shrine
37%inclusion48 decks130 decks
-13%synergy
Watery Grave
37%inclusion48 decks130 decks
-13%synergy
Isolated Chapel
34%inclusion44 decks130 decks
-5%synergy
Polluted Delta
34%inclusion44 decks130 decks
-3%synergy
Flooded Strand
34%inclusion44 decks130 decks
-4%synergy
Raffine's Tower
33%inclusion43 decks130 decks
-8%synergy
Drowned Catacomb
33%inclusion43 decks130 decks
-2%synergy
Marsh Flats
31%inclusion40 decks130 decks
-5%synergy
Prairie Stream
29%inclusion38 decks130 decks
-11%synergy
Undercity Sewers
28%inclusion37 decks130 decks
14%synergy
Sea of Clouds
27%inclusion35 decks130 decks
-9%synergy
Terramorphic Expanse
26%inclusion34 decks130 decks
9%synergy
Meticulous Archive
25%inclusion33 decks130 decks
12%synergy
Shadowy Backstreet
25%inclusion32 decks130 decks
12%synergy
Contaminated Landscape
25%inclusion32 decks130 decks
10%synergy
Sunken Hollow
25%inclusion32 decks130 decks
-15%synergy
Azorius Chancery
24%inclusion31 decks130 decks
9%synergy
Temple of Enlightenment
24%inclusion31 decks130 decks
7%synergy
Deserted Beach
24%inclusion31 decks130 decks
3%synergy
Temple of Deceit
23%inclusion30 decks130 decks
5%synergy
Shipwreck Marsh
23%inclusion30 decks130 decks
2%synergy
Evolving Wilds
23%inclusion30 decks130 decks
-2%synergy
Orzhov Basilica
23%inclusion30 decks130 decks
7%synergy
Vault of Champions
23%inclusion30 decks130 decks
-10%synergy
Dimir Aqueduct
23%inclusion30 decks130 decks
9%synergy
Morphic Pool
22%inclusion28 decks130 decks
-13%synergy
Temple of Silence
22%inclusion28 decks130 decks
2%synergy
Obscura Storefront
19%inclusion25 decks130 decks
9%synergy
Gloomlake Verge
18%inclusion23 decks130 decks
7%synergy
Floodfarm Verge
17%inclusion22 decks130 decks
6%synergy
Shattered Sanctum
16%inclusion21 decks130 decks
0%synergy
Fabled Passage
15%inclusion20 decks130 decks
8%synergy
Tainted Field
15%inclusion19 decks130 decks
8%synergy
Darkwater Catacombs
15%inclusion19 decks130 decks
0%synergy
Tainted Isle
14%inclusion18 decks130 decks
7%synergy
City of Brass
14%inclusion18 decks130 decks
-1%synergy
Port Town
12%inclusion16 decks130 decks
-5%synergy
Ash Barrens
12%inclusion15 decks130 decks
1%synergy
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