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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Enchantments
Battles
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Utility Lands
Mana Artifacts
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Noggle the Mind
6.5%inclusion2 decks31 decks
6%synergy
Aquitect's Defenses
3.2%inclusion1 decks31 decks
3%synergy
Mirrorform
3.0%inclusion1 decks33 decks
2%synergy
High Synergy Cards
Ripples of Undeath
73%inclusion102 decks139 decks
71%synergy
Inquisitive Glimmer
78%inclusion108 decks139 decks
70%synergy
Mesa Enchantress
73%inclusion102 decks139 decks
64%synergy
Gravebreaker Lamia
60%inclusion84 decks139 decks
59%synergy
Entity Tracker
65%inclusion91 decks139 decks
59%synergy
Starfield Mystic
63%inclusion88 decks139 decks
57%synergy
Demon of Fate's Design
60%inclusion84 decks139 decks
55%synergy
Hall of Heliod's Generosity
66%inclusion92 decks139 decks
53%synergy
Scrabbling Skullcrab
54%inclusion75 decks139 decks
53%synergy
Animate Dead
62%inclusion86 decks139 decks
52%synergy
Top Cards
Doomwake Giant
55%inclusion77 decks139 decks
50%synergy
Fear of Sleep Paralysis
53%inclusion74 decks139 decks
48%synergy
Overlord of the Floodpits
51%inclusion71 decks139 decks
47%synergy
Dress Down
49%inclusion68 decks139 decks
47%synergy
Mystic Remora
47%inclusion66 decks139 decks
26%synergy
Overlord of the Balemurk
46%inclusion64 decks139 decks
44%synergy
Sphere of Safety
45%inclusion63 decks139 decks
36%synergy
Necromancy
45%inclusion62 decks139 decks
40%synergy
Seal of Cleansing
45%inclusion62 decks139 decks
43%synergy
Sevinne's Reclamation
45%inclusion62 decks139 decks
36%synergy
Game Changers
Smothering Tithe
38%inclusion53 decks139 decks
7%synergy
Rhystic Study
35%inclusion48 decks139 decks
3%synergy
Enlightened Tutor
17%inclusion23 decks139 decks
-3%synergy
Necropotence
16%inclusion22 decks139 decks
9%synergy
Demonic Tutor
14%inclusion20 decks139 decks
-7%synergy
Thassa's Oracle
12%inclusion16 decks139 decks
2%synergy
Mystical Tutor
12%inclusion16 decks139 decks
0%synergy
Vampiric Tutor
12%inclusion16 decks139 decks
-6%synergy
Fierce Guardianship
10%inclusion14 decks139 decks
-11%synergy
Cyclonic Rift
8.6%inclusion12 decks139 decks
-15%synergy
Creatures
Fear of Impostors
42%inclusion59 decks139 decks
41%synergy
Victor, Valgavoth's Seneschal
42%inclusion59 decks139 decks
40%synergy
Zur, Eternal Schemer
42%inclusion58 decks139 decks
38%synergy
Ondu Spiritdancer
41%inclusion57 decks139 decks
35%synergy
Zur the Enchanter
33%inclusion46 decks139 decks
28%synergy
Ghostly Dancers
32%inclusion44 decks139 decks
29%synergy
Silent Hallcreeper
27%inclusion37 decks139 decks
22%synergy
Enduring Curiosity
27%inclusion37 decks139 decks
19%synergy
Grim Guardian
25%inclusion35 decks139 decks
23%synergy
Heliod, the Radiant Dawn
25%inclusion35 decks139 decks
21%synergy
Soaring Lightbringer
24%inclusion33 decks139 decks
19%synergy
Aminatou, Veil Piercer
22%inclusion31 decks139 decks
21%synergy
Mindwrack Harpy
22%inclusion31 decks139 decks
22%synergy
Archon of Sun's Grace
22%inclusion30 decks139 decks
17%synergy
Sage of Mysteries
22%inclusion30 decks139 decks
21%synergy
Alseid of Life's Bounty
19%inclusion26 decks139 decks
17%synergy
Moon-Blessed Cleric
18%inclusion25 decks139 decks
13%synergy
Skullsnap Nuisance
17%inclusion24 decks139 decks
17%synergy
Abdel Adrian, Gorion's Ward
17%inclusion24 decks139 decks
16%synergy
Overlord of the Mistmoors
17%inclusion23 decks139 decks
14%synergy
Archetype of Imagination
16%inclusion22 decks139 decks
11%synergy
Hedron Crab
15%inclusion21 decks139 decks
14%synergy
Ancient Cellarspawn
15%inclusion21 decks139 decks
12%synergy
Athreos, Shroud-Veiled
14%inclusion20 decks139 decks
10%synergy
Balemurk Leech
14%inclusion20 decks139 decks
14%synergy
Gremlin Tamer
14%inclusion19 decks139 decks
13%synergy
Esper Sentinel
13%inclusion18 decks139 decks
-15%synergy
Laboratory Maniac
13%inclusion18 decks139 decks
10%synergy
Starnheim Courser
12%inclusion17 decks139 decks
8%synergy
Lotho, Corrupt Shirriff
12%inclusion16 decks139 decks
-5%synergy
Emet-Selch of the Third Seat
11%inclusion10 decks90 decks
2%synergy
Summon: Bahamut
11%inclusion10 decks90 decks
10%synergy
Stenn, Paranoid Partisan
11%inclusion15 decks139 decks
9%synergy
Spirited Companion
11%inclusion15 decks139 decks
9%synergy
Nashi, Searcher in the Dark
11%inclusion15 decks139 decks
10%synergy
Millikin
11%inclusion15 decks139 decks
10%synergy
Witch Enchanter
11%inclusion15 decks139 decks
4%synergy
Phenax, God of Deception
11%inclusion15 decks139 decks
10%synergy
Grand Abolisher
11%inclusion15 decks139 decks
-4%synergy
Summon: Yojimbo
10%inclusion9 decks90 decks
9%synergy
Fear of Infinity
9.4%inclusion13 decks139 decks
9%synergy
Fear of Surveillance
9.4%inclusion13 decks139 decks
9%synergy
Hullbreaker Horror
9.4%inclusion13 decks139 decks
3%synergy
Neerdiv, Devious Diver
8.3%inclusion10 decks121 decks
8%synergy
Valgavoth, Terror Eater
7.9%inclusion11 decks139 decks
5%synergy
Displacer Kitten
7.2%inclusion10 decks139 decks
0%synergy
Valley Floodcaller
7.2%inclusion10 decks139 decks
3%synergy
Ledger Shredder
7.2%inclusion10 decks139 decks
-2%synergy
Stitcher's Supplier
7.2%inclusion10 decks139 decks
6%synergy
Protean Thaumaturge
6.5%inclusion9 decks139 decks
6%synergy
Instants
Swords to Plowshares
44%inclusion61 decks139 decks
-24%synergy
Entomb
32%inclusion45 decks139 decks
26%synergy
Counterspell
32%inclusion45 decks139 decks
-9%synergy
Path to Exile
25%inclusion35 decks139 decks
-17%synergy
An Offer You Can't Refuse
24%inclusion33 decks139 decks
-3%synergy
Arcane Denial
22%inclusion30 decks139 decks
1%synergy
Void Rend
21%inclusion29 decks139 decks
-13%synergy
Dark Ritual
20%inclusion28 decks139 decks
1%synergy
Dovin's Veto
15%inclusion21 decks139 decks
-10%synergy
Thirst for Meaning
14%inclusion20 decks139 decks
13%synergy
Otherworldly Gaze
14%inclusion20 decks139 decks
12%synergy
Negate
12%inclusion17 decks139 decks
-4%synergy
Frantic Search
12%inclusion16 decks139 decks
-6%synergy
Inkshield
12%inclusion16 decks139 decks
2%synergy
Swan Song
11%inclusion15 decks139 decks
-9%synergy
Fell the Profane
10%inclusion14 decks139 decks
1%synergy
Silence
9.4%inclusion13 decks139 decks
-1%synergy
Faithful Mending
9.4%inclusion13 decks139 decks
6%synergy
Sink into Stupor
8.6%inclusion12 decks139 decks
-4%synergy
Cabal Ritual
7.9%inclusion11 decks139 decks
4%synergy
Anguished Unmaking
7.9%inclusion11 decks139 decks
-17%synergy
Demonic Consultation
7.2%inclusion10 decks139 decks
-1%synergy
Mindbreak Trap
6.5%inclusion9 decks139 decks
0%synergy
Utter End
6.5%inclusion9 decks139 decks
0%synergy
Borne Upon a Wind
5.8%inclusion8 decks139 decks
1%synergy
Mana Drain
5.8%inclusion8 decks139 decks
-12%synergy
Thought Scour
5.0%inclusion7 decks139 decks
4%synergy
Flusterstorm
5.0%inclusion7 decks139 decks
-3%synergy
Get Out
5.0%inclusion7 decks139 decks
5%synergy
Withering Torment
5.0%inclusion7 decks139 decks
3%synergy
Tainted Pact
5.0%inclusion7 decks139 decks
-2%synergy
Brainstorm
5.0%inclusion7 decks139 decks
-12%synergy
Force of Will
5.0%inclusion7 decks139 decks
-8%synergy
Sorceries
Redress Fate
32%inclusion45 decks139 decks
27%synergy
Singularity Rupture
22%inclusion18 decks82 decks
20%synergy
Windfall
21%inclusion29 decks139 decks
7%synergy
Extinguish All Hope
20%inclusion28 decks139 decks
19%synergy
Dance of the Manse
20%inclusion28 decks139 decks
17%synergy
Reanimate
20%inclusion28 decks139 decks
4%synergy
Toxic Deluge
17%inclusion24 decks139 decks
-2%synergy
Time Wipe
15%inclusion21 decks139 decks
8%synergy
Resurgent Belief
15%inclusion21 decks139 decks
13%synergy
Space-Time Anomaly
13%inclusion10 decks79 decks
11%synergy
Idyllic Tutor
12%inclusion17 decks139 decks
8%synergy
Glimpse the Unthinkable
12%inclusion16 decks139 decks
11%synergy
Brilliant Restoration
9.4%inclusion13 decks139 decks
7%synergy
Traumatize
9.4%inclusion13 decks139 decks
9%synergy
Replenish
8.6%inclusion12 decks139 decks
7%synergy
Demonic Counsel
8.6%inclusion12 decks139 decks
8%synergy
Damn
7.9%inclusion11 decks139 decks
-13%synergy
Supreme Verdict
7.2%inclusion10 decks139 decks
-8%synergy
Austere Command
7.2%inclusion10 decks139 decks
-2%synergy
Unmarked Grave
7.2%inclusion10 decks139 decks
6%synergy
Feed the Swarm
5.8%inclusion8 decks139 decks
3%synergy
Buried Alive
5.8%inclusion8 decks139 decks
2%synergy
Ponder
5.0%inclusion7 decks139 decks
-4%synergy
Utility Artifacts
Mesmeric Orb
20%inclusion28 decks139 decks
19%synergy
Lightning Greaves
10%inclusion14 decks139 decks
-12%synergy
Cloud Key
8.6%inclusion12 decks139 decks
5%synergy
Wayfarer's Bauble
8.6%inclusion12 decks139 decks
1%synergy
Keys to the House
7.9%inclusion11 decks139 decks
8%synergy
Perpetual Timepiece
7.2%inclusion10 decks139 decks
7%synergy
The One Ring
7.2%inclusion10 decks139 decks
-6%synergy
Wishclaw Talisman
7.2%inclusion10 decks139 decks
-1%synergy
Palantír of Orthanc
5.8%inclusion8 decks139 decks
5%synergy
Crucible of Worlds
5.0%inclusion7 decks139 decks
4%synergy
Swiftfoot Boots
5.0%inclusion7 decks139 decks
-19%synergy
Enchantments
Starfield of Nyx
43%inclusion60 decks139 decks
39%synergy
Cemetery Tampering
42%inclusion58 decks139 decks
41%synergy
Secret Arcade // Dusty Parlor
41%inclusion57 decks139 decks
36%synergy
Propaganda
40%inclusion56 decks139 decks
13%synergy
Ghostly Prison
39%inclusion54 decks139 decks
17%synergy
Grasp of Fate
38%inclusion53 decks139 decks
32%synergy
Mirrormade
37%inclusion51 decks139 decks
27%synergy
Sigil of the Empty Throne
36%inclusion50 decks139 decks
30%synergy
Stillness in Motion
33%inclusion32 decks98 decks
32%synergy
Amphibian Downpour
31%inclusion43 decks139 decks
26%synergy
Estrid's Invocation
29%inclusion41 decks139 decks
25%synergy
Blind Obedience
29%inclusion41 decks139 decks
17%synergy
Court of Cunning
27%inclusion37 decks139 decks
26%synergy
Darksteel Mutation
26%inclusion36 decks139 decks
20%synergy
Defiled Crypt // Cadaver Lab
26%inclusion36 decks139 decks
25%synergy
Dance of the Dead
25%inclusion35 decks139 decks
23%synergy
Cacophony Unleashed
25%inclusion35 decks139 decks
23%synergy
Polluted Cistern // Dim Oubliette
24%inclusion34 decks139 decks
24%synergy
The Tale of Tamiyo
24%inclusion33 decks139 decks
23%synergy
All That Glitters
22%inclusion31 decks139 decks
14%synergy
Ethereal Armor
22%inclusion31 decks139 decks
18%synergy
Phyrexian Arena
22%inclusion30 decks139 decks
8%synergy
Monologue Tax
21%inclusion29 decks139 decks
15%synergy
Out of the Tombs
21%inclusion29 decks139 decks
20%synergy
Restricted Office // Lecture Hall
21%inclusion29 decks139 decks
19%synergy
Extravagant Replication
20%inclusion28 decks139 decks
15%synergy
Copy Enchantment
19%inclusion27 decks139 decks
15%synergy
Bottomless Pool // Locker Room
19%inclusion27 decks139 decks
17%synergy
Seal of Removal
19%inclusion26 decks139 decks
18%synergy
Imprisoned in the Moon
18%inclusion25 decks139 decks
11%synergy
Shark Typhoon
18%inclusion25 decks139 decks
12%synergy
Central Elevator // Promising Stairs
18%inclusion25 decks139 decks
17%synergy
Black Market Connections
18%inclusion25 decks139 decks
4%synergy
Sheltered by Ghosts
18%inclusion25 decks139 decks
15%synergy
Teval's Judgment
18%inclusion18 decks102 decks
17%synergy
Hallowed Haunting
17%inclusion23 decks139 decks
14%synergy
Greater Auramancy
17%inclusion23 decks139 decks
12%synergy
Mirror Room // Fractured Realm
17%inclusion23 decks139 decks
14%synergy
The Meathook Massacre
16%inclusion22 decks139 decks
12%synergy
Timely Ward
15%inclusion21 decks139 decks
10%synergy
Underwater Tunnel // Slimy Aquarium
14%inclusion20 decks139 decks
14%synergy
Touch the Spirit Realm
14%inclusion20 decks139 decks
12%synergy
Meat Locker // Drowned Diner
14%inclusion19 decks136 decks
13%synergy
Cramped Vents // Access Maze
14%inclusion19 decks139 decks
11%synergy
Secrets of the Dead
13%inclusion18 decks139 decks
13%synergy
Leyline of Anticipation
12%inclusion17 decks139 decks
8%synergy
Dazzling Theater // Prop Room
12%inclusion17 decks139 decks
11%synergy
Derelict Attic // Widow's Walk
12%inclusion16 decks136 decks
11%synergy
Nowhere to Run
12%inclusion16 decks139 decks
10%synergy
Funeral Room // Awakening Hall
12%inclusion16 decks139 decks
11%synergy
Battles
Invasion of Theros
11%inclusion15 decks139 decks
9%synergy
Planeswalkers
Ashiok, Dream Render
6.5%inclusion9 decks139 decks
5%synergy
Teferi, Time Raveler
5.8%inclusion8 decks139 decks
-3%synergy
Utility Lands
Bojuka Bog
35%inclusion49 decks139 decks
8%synergy
Otawara, Soaring City
17%inclusion24 decks139 decks
-2%synergy
Reliquary Tower
17%inclusion23 decks139 decks
-17%synergy
Takenuma, Abandoned Mire
15%inclusion21 decks139 decks
9%synergy
Cephalid Coliseum
14%inclusion19 decks139 decks
10%synergy
Nephalia Drownyard
11%inclusion15 decks139 decks
10%synergy
Halimar Depths
9.4%inclusion13 decks139 decks
5%synergy
Urborg, Tomb of Yawgmoth
7.9%inclusion11 decks139 decks
-5%synergy
Temple of the False God
7.2%inclusion10 decks139 decks
-1%synergy
Ancient Tomb
7.2%inclusion10 decks139 decks
-6%synergy
Serra's Sanctum
6.5%inclusion9 decks139 decks
5%synergy
Urza's Saga
6.5%inclusion9 decks139 decks
-5%synergy
Adagia, Windswept Bastion
6.2%inclusion5 decks81 decks
4%synergy
Ishgard, the Holy See
5.6%inclusion5 decks90 decks
2%synergy
Restless Reef
5.0%inclusion7 decks139 decks
4%synergy
Rogue's Passage
5.0%inclusion7 decks139 decks
-4%synergy
Dakmor Salvage
5.0%inclusion7 decks139 decks
5%synergy
Mana Artifacts
Arcane Signet
87%inclusion121 decks139 decks
-1%synergy
Sol Ring
87%inclusion121 decks139 decks
-3%synergy
Talisman of Dominance
49%inclusion68 decks139 decks
-1%synergy
Talisman of Progress
42%inclusion58 decks139 decks
-2%synergy
Talisman of Hierarchy
40%inclusion55 decks139 decks
-4%synergy
Azorius Signet
35%inclusion49 decks139 decks
4%synergy
Orzhov Signet
32%inclusion45 decks139 decks
-1%synergy
Fellwar Stone
26%inclusion36 decks139 decks
-8%synergy
Dimir Signet
24%inclusion33 decks139 decks
-8%synergy
Mind Stone
17%inclusion23 decks139 decks
4%synergy
Commander's Sphere
9.4%inclusion13 decks139 decks
-9%synergy
Mana Vault
7.2%inclusion10 decks139 decks
-2%synergy
Chromatic Lantern
5.8%inclusion8 decks139 decks
-7%synergy
Lotus Petal
5.0%inclusion7 decks139 decks
-6%synergy
Lands
Island
96%inclusion134 decks139 decks
4%synergy
Plains
95%inclusion132 decks139 decks
3%synergy
Command Tower
94%inclusion131 decks139 decks
2%synergy
Swamp
94%inclusion131 decks139 decks
3%synergy
Arcane Sanctum
62%inclusion86 decks139 decks
7%synergy
Caves of Koilos
55%inclusion77 decks139 decks
20%synergy
Adarkar Wastes
51%inclusion71 decks139 decks
20%synergy
Underground River
50%inclusion69 decks139 decks
16%synergy
Exotic Orchard
49%inclusion68 decks139 decks
-10%synergy
Glacial Fortress
44%inclusion61 decks139 decks
3%synergy
Watery Grave
40%inclusion56 decks139 decks
-10%synergy
Hallowed Fountain
40%inclusion56 decks139 decks
-10%synergy
Godless Shrine
39%inclusion54 decks139 decks
-12%synergy
Valgavoth's Lair
38%inclusion53 decks139 decks
35%synergy
Polluted Delta
37%inclusion51 decks139 decks
-1%synergy
Flooded Strand
35%inclusion49 decks139 decks
-3%synergy
Drowned Catacomb
35%inclusion48 decks139 decks
-2%synergy
Raffine's Tower
35%inclusion48 decks139 decks
-6%synergy
Isolated Chapel
34%inclusion47 decks139 decks
-6%synergy
Marsh Flats
33%inclusion46 decks139 decks
-3%synergy
Undercity Sewers
30%inclusion42 decks139 decks
16%synergy
Prairie Stream
29%inclusion40 decks139 decks
-12%synergy
Meticulous Archive
29%inclusion40 decks139 decks
15%synergy
Sea of Clouds
28%inclusion39 decks139 decks
-7%synergy
Shadowy Backstreet
27%inclusion37 decks139 decks
14%synergy
Terramorphic Expanse
26%inclusion36 decks139 decks
10%synergy
Evolving Wilds
26%inclusion36 decks139 decks
1%synergy
Deserted Beach
26%inclusion36 decks139 decks
5%synergy
Azorius Chancery
25%inclusion35 decks139 decks
11%synergy
Sunken Hollow
25%inclusion35 decks139 decks
-15%synergy
Vault of Champions
25%inclusion35 decks139 decks
-7%synergy
Shipwreck Marsh
24%inclusion34 decks139 decks
4%synergy
Temple of Enlightenment
24%inclusion33 decks139 decks
7%synergy
Morphic Pool
24%inclusion33 decks139 decks
-10%synergy
Contaminated Landscape
24%inclusion33 decks139 decks
10%synergy
Orzhov Basilica
23%inclusion32 decks139 decks
7%synergy
Dimir Aqueduct
23%inclusion32 decks139 decks
9%synergy
Temple of Deceit
22%inclusion30 decks139 decks
4%synergy
Obscura Storefront
22%inclusion30 decks139 decks
12%synergy
Temple of Silence
22%inclusion30 decks139 decks
2%synergy
Gloomlake Verge
18%inclusion25 decks139 decks
7%synergy
Floodfarm Verge
17%inclusion24 decks139 decks
6%synergy
Shattered Sanctum
17%inclusion24 decks139 decks
1%synergy
Fabled Passage
16%inclusion22 decks139 decks
8%synergy
Tainted Field
14%inclusion20 decks139 decks
7%synergy
Tainted Isle
14%inclusion19 decks139 decks
7%synergy
Darkwater Catacombs
14%inclusion19 decks139 decks
-1%synergy
City of Brass
13%inclusion18 decks139 decks
-2%synergy
Port Town
12%inclusion17 decks139 decks
-5%synergy
Ash Barrens
12%inclusion17 decks139 decks
1%synergy
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