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
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Utility Lands
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Paramecia Coloniex
2.6%inclusion1 decks38 decks
3%synergy
The Cloning of Shredder
2.1%inclusion1 decks48 decks
2%synergy
Ninja Teen
2.1%inclusion1 decks48 decks
-1%synergy
Weather Maker
2.1%inclusion1 decks48 decks
2%synergy
Splinter's Technique
2.1%inclusion1 decks48 decks
-1%synergy
High Synergy Cards
Ripples of Undeath
73%inclusion111 decks153 decks
70%synergy
Inquisitive Glimmer
77%inclusion118 decks153 decks
70%synergy
Mesa Enchantress
73%inclusion112 decks153 decks
64%synergy
Gravebreaker Lamia
63%inclusion97 decks153 decks
62%synergy
Entity Tracker
66%inclusion101 decks153 decks
60%synergy
Demon of Fate's Design
63%inclusion96 decks153 decks
57%synergy
Starfield Mystic
63%inclusion96 decks153 decks
56%synergy
Scrabbling Skullcrab
54%inclusion82 decks153 decks
53%synergy
Hall of Heliod's Generosity
65%inclusion99 decks153 decks
52%synergy
Overlord of the Floodpits
54%inclusion82 decks153 decks
50%synergy
Top Cards
Animate Dead
59%inclusion90 decks153 decks
49%synergy
Doomwake Giant
55%inclusion84 decks153 decks
49%synergy
Fear of Sleep Paralysis
52%inclusion80 decks153 decks
47%synergy
Overlord of the Balemurk
48%inclusion73 decks153 decks
46%synergy
Dress Down
48%inclusion73 decks153 decks
45%synergy
Mystic Remora
47%inclusion72 decks153 decks
26%synergy
Sphere of Safety
47%inclusion72 decks153 decks
38%synergy
Swords to Plowshares
46%inclusion70 decks153 decks
-22%synergy
Zur, Eternal Schemer
45%inclusion69 decks153 decks
42%synergy
Secret Arcade // Dusty Parlor
44%inclusion68 decks153 decks
40%synergy
Game Changers
Smothering Tithe
39%inclusion59 decks153 decks
8%synergy
Rhystic Study
33%inclusion50 decks153 decks
2%synergy
Enlightened Tutor
18%inclusion27 decks153 decks
-2%synergy
Necropotence
17%inclusion26 decks153 decks
10%synergy
Demonic Tutor
14%inclusion22 decks153 decks
-6%synergy
Thassa's Oracle
14%inclusion21 decks153 decks
5%synergy
Vampiric Tutor
12%inclusion19 decks153 decks
-4%synergy
Mystical Tutor
12%inclusion18 decks153 decks
1%synergy
Fierce Guardianship
10%inclusion16 decks153 decks
-10%synergy
Cyclonic Rift
9.2%inclusion14 decks153 decks
-14%synergy
Creatures
Fear of Impostors
44%inclusion67 decks153 decks
42%synergy
Victor, Valgavoth's Seneschal
44%inclusion67 decks153 decks
42%synergy
Ondu Spiritdancer
42%inclusion65 decks153 decks
36%synergy
Ghostly Dancers
31%inclusion48 decks153 decks
29%synergy
Zur the Enchanter
31%inclusion48 decks153 decks
26%synergy
Silent Hallcreeper
28%inclusion43 decks153 decks
24%synergy
Enduring Curiosity
27%inclusion41 decks153 decks
19%synergy
Grim Guardian
27%inclusion41 decks153 decks
24%synergy
Heliod, the Radiant Dawn
25%inclusion39 decks153 decks
22%synergy
Soaring Lightbringer
25%inclusion38 decks153 decks
20%synergy
Sage of Mysteries
23%inclusion35 decks153 decks
23%synergy
Archon of Sun's Grace
22%inclusion34 decks153 decks
18%synergy
Aminatou, Veil Piercer
22%inclusion33 decks153 decks
20%synergy
Mindwrack Harpy
21%inclusion32 decks153 decks
21%synergy
Moon-Blessed Cleric
19%inclusion29 decks153 decks
14%synergy
Abdel Adrian, Gorion's Ward
19%inclusion29 decks153 decks
17%synergy
Archetype of Imagination
18%inclusion27 decks153 decks
13%synergy
Overlord of the Mistmoors
17%inclusion26 decks153 decks
15%synergy
Alseid of Life's Bounty
17%inclusion26 decks153 decks
16%synergy
Ancient Cellarspawn
16%inclusion25 decks153 decks
13%synergy
Hedron Crab
16%inclusion24 decks153 decks
15%synergy
Skullsnap Nuisance
16%inclusion24 decks153 decks
15%synergy
Athreos, Shroud-Veiled
16%inclusion24 decks153 decks
11%synergy
Balemurk Leech
15%inclusion23 decks153 decks
14%synergy
Gremlin Tamer
14%inclusion22 decks153 decks
13%synergy
Esper Sentinel
12%inclusion19 decks153 decks
-15%synergy
Nashi, Searcher in the Dark
12%inclusion19 decks153 decks
12%synergy
Emet-Selch of the Third Seat
12%inclusion13 decks105 decks
3%synergy
Starnheim Courser
12%inclusion18 decks153 decks
8%synergy
Phenax, God of Deception
12%inclusion18 decks153 decks
11%synergy
Lotho, Corrupt Shirriff
11%inclusion17 decks153 decks
-6%synergy
Summon: Bahamut
10%inclusion11 decks105 decks
9%synergy
Laboratory Maniac
10%inclusion16 decks153 decks
7%synergy
Fear of Infinity
10%inclusion15 decks153 decks
9%synergy
Witch Enchanter
10%inclusion15 decks153 decks
3%synergy
Spirited Companion
10%inclusion15 decks153 decks
8%synergy
Grand Abolisher
10%inclusion15 decks153 decks
-5%synergy
Ledger Shredder
10%inclusion15 decks153 decks
1%synergy
Summon: Yojimbo
10%inclusion10 decks105 decks
8%synergy
Stenn, Paranoid Partisan
9.2%inclusion14 decks153 decks
8%synergy
Hullbreaker Horror
9.2%inclusion14 decks153 decks
3%synergy
Displacer Kitten
7.8%inclusion12 decks153 decks
1%synergy
Fear of Surveillance
7.8%inclusion12 decks153 decks
8%synergy
Stitcher's Supplier
7.8%inclusion12 decks153 decks
7%synergy
Millikin
7.8%inclusion12 decks153 decks
7%synergy
Neerdiv, Devious Diver
7.4%inclusion10 decks135 decks
7%synergy
Nightmare Shepherd
7.2%inclusion11 decks153 decks
5%synergy
Auramancer
7.2%inclusion11 decks153 decks
4%synergy
Valgavoth, Terror Eater
7.2%inclusion11 decks153 decks
4%synergy
Valley Floodcaller
6.5%inclusion10 decks153 decks
3%synergy
Instants
Counterspell
31%inclusion48 decks153 decks
-10%synergy
Entomb
31%inclusion47 decks153 decks
24%synergy
Path to Exile
25%inclusion38 decks153 decks
-17%synergy
Void Rend
23%inclusion35 decks153 decks
-12%synergy
Dark Ritual
21%inclusion32 decks153 decks
1%synergy
Arcane Denial
21%inclusion32 decks153 decks
1%synergy
An Offer You Can't Refuse
20%inclusion31 decks153 decks
-7%synergy
Dovin's Veto
14%inclusion22 decks153 decks
-11%synergy
Thirst for Meaning
14%inclusion21 decks153 decks
12%synergy
Otherworldly Gaze
13%inclusion20 decks153 decks
11%synergy
Frantic Search
12%inclusion18 decks153 decks
-6%synergy
Inkshield
12%inclusion18 decks153 decks
2%synergy
Negate
10%inclusion16 decks153 decks
-6%synergy
Silence
10%inclusion16 decks153 decks
0%synergy
Swan Song
10%inclusion16 decks153 decks
-9%synergy
Cabal Ritual
10%inclusion15 decks153 decks
6%synergy
Faithful Mending
10%inclusion15 decks153 decks
6%synergy
Sink into Stupor
10%inclusion15 decks153 decks
-3%synergy
Fell the Profane
9.2%inclusion14 decks153 decks
0%synergy
Demonic Consultation
9.2%inclusion14 decks153 decks
1%synergy
Anguished Unmaking
7.8%inclusion12 decks153 decks
-18%synergy
Tainted Pact
6.5%inclusion10 decks153 decks
0%synergy
Utter End
6.5%inclusion10 decks153 decks
0%synergy
Mindbreak Trap
5.9%inclusion9 decks153 decks
-1%synergy
Force of Will
5.9%inclusion9 decks153 decks
-6%synergy
Flusterstorm
5.9%inclusion9 decks153 decks
-2%synergy
Borne Upon a Wind
5.9%inclusion9 decks153 decks
1%synergy
Thought Scour
5.2%inclusion8 decks153 decks
4%synergy
Get Out
5.2%inclusion8 decks153 decks
5%synergy
Force of Negation
5.2%inclusion8 decks153 decks
-6%synergy
Pact of Negation
5.2%inclusion8 decks153 decks
-2%synergy
Withering Torment
5.2%inclusion8 decks153 decks
4%synergy
Sorceries
Sevinne's Reclamation
42%inclusion64 decks153 decks
33%synergy
Redress Fate
32%inclusion49 decks153 decks
26%synergy
Extinguish All Hope
21%inclusion32 decks153 decks
19%synergy
Windfall
20%inclusion30 decks153 decks
6%synergy
Reanimate
19%inclusion29 decks153 decks
3%synergy
Dance of the Manse
19%inclusion29 decks153 decks
16%synergy
Singularity Rupture
19%inclusion18 decks97 decks
16%synergy
Toxic Deluge
16%inclusion24 decks153 decks
-4%synergy
Resurgent Belief
15%inclusion23 decks153 decks
13%synergy
Time Wipe
13%inclusion20 decks153 decks
6%synergy
Idyllic Tutor
12%inclusion19 decks153 decks
8%synergy
Glimpse the Unthinkable
12%inclusion18 decks153 decks
11%synergy
Replenish
10%inclusion15 decks153 decks
8%synergy
Space-Time Anomaly
10%inclusion9 decks94 decks
8%synergy
Damn
9.2%inclusion14 decks153 decks
-11%synergy
Brilliant Restoration
8.5%inclusion13 decks153 decks
7%synergy
Traumatize
8.5%inclusion13 decks153 decks
8%synergy
Demonic Counsel
7.8%inclusion12 decks153 decks
7%synergy
Unmarked Grave
7.2%inclusion11 decks153 decks
6%synergy
Buried Alive
6.5%inclusion10 decks153 decks
2%synergy
Supreme Verdict
5.9%inclusion9 decks153 decks
-9%synergy
Ponder
5.9%inclusion9 decks153 decks
-3%synergy
Austere Command
5.9%inclusion9 decks153 decks
-3%synergy
Feed the Swarm
5.9%inclusion9 decks153 decks
3%synergy
Imperial Seal
5.2%inclusion8 decks153 decks
-2%synergy
Terminus
5.2%inclusion8 decks153 decks
1%synergy
Utility Artifacts
Mesmeric Orb
18%inclusion28 decks153 decks
17%synergy
Cloud Key
10%inclusion16 decks153 decks
7%synergy
Keys to the House
8.5%inclusion13 decks153 decks
8%synergy
Lightning Greaves
8.5%inclusion13 decks153 decks
-14%synergy
The One Ring
7.2%inclusion11 decks153 decks
-6%synergy
Wishclaw Talisman
7.2%inclusion11 decks153 decks
-1%synergy
Perpetual Timepiece
6.5%inclusion10 decks153 decks
6%synergy
Wayfarer's Bauble
6.5%inclusion10 decks153 decks
-1%synergy
Crucible of Worlds
5.9%inclusion9 decks153 decks
5%synergy
Enchantments
Starfield of Nyx
44%inclusion67 decks153 decks
40%synergy
Necromancy
43%inclusion66 decks153 decks
39%synergy
Seal of Cleansing
43%inclusion66 decks153 decks
42%synergy
Propaganda
40%inclusion61 decks153 decks
12%synergy
Sigil of the Empty Throne
39%inclusion60 decks153 decks
33%synergy
Cemetery Tampering
39%inclusion60 decks153 decks
38%synergy
Grasp of Fate
39%inclusion59 decks153 decks
32%synergy
Mirrormade
37%inclusion57 decks153 decks
28%synergy
Ghostly Prison
37%inclusion56 decks153 decks
14%synergy
Amphibian Downpour
32%inclusion49 decks153 decks
27%synergy
Stillness in Motion
31%inclusion35 decks113 decks
31%synergy
Estrid's Invocation
31%inclusion47 decks153 decks
26%synergy
Blind Obedience
27%inclusion42 decks153 decks
15%synergy
Cacophony Unleashed
27%inclusion41 decks153 decks
25%synergy
Defiled Crypt // Cadaver Lab
26%inclusion40 decks153 decks
25%synergy
Darksteel Mutation
25%inclusion39 decks153 decks
19%synergy
Dance of the Dead
25%inclusion39 decks153 decks
23%synergy
Polluted Cistern // Dim Oubliette
25%inclusion38 decks153 decks
24%synergy
The Tale of Tamiyo
24%inclusion37 decks153 decks
24%synergy
Court of Cunning
24%inclusion36 decks153 decks
23%synergy
Monologue Tax
23%inclusion35 decks153 decks
17%synergy
Extravagant Replication
22%inclusion34 decks153 decks
17%synergy
Restricted Office // Lecture Hall
22%inclusion34 decks153 decks
20%synergy
Ethereal Armor
21%inclusion32 decks153 decks
16%synergy
Out of the Tombs
20%inclusion31 decks153 decks
20%synergy
All That Glitters
20%inclusion31 decks153 decks
12%synergy
Phyrexian Arena
20%inclusion31 decks153 decks
6%synergy
Central Elevator // Promising Stairs
20%inclusion30 decks153 decks
19%synergy
Bottomless Pool // Locker Room
20%inclusion30 decks153 decks
18%synergy
Copy Enchantment
18%inclusion28 decks153 decks
14%synergy
Sheltered by Ghosts
18%inclusion28 decks153 decks
16%synergy
Seal of Removal
18%inclusion27 decks153 decks
17%synergy
Teval's Judgment
17%inclusion20 decks117 decks
16%synergy
Shark Typhoon
17%inclusion26 decks153 decks
11%synergy
Mirror Room // Fractured Realm
17%inclusion26 decks153 decks
15%synergy
Hallowed Haunting
17%inclusion26 decks153 decks
15%synergy
Greater Auramancy
16%inclusion25 decks153 decks
12%synergy
Imprisoned in the Moon
16%inclusion24 decks153 decks
9%synergy
Black Market Connections
16%inclusion24 decks153 decks
1%synergy
Cramped Vents // Access Maze
15%inclusion23 decks153 decks
13%synergy
Timely Ward
15%inclusion23 decks153 decks
10%synergy
The Meathook Massacre
14%inclusion22 decks153 decks
11%synergy
Dazzling Theater // Prop Room
14%inclusion22 decks153 decks
13%synergy
Underwater Tunnel // Slimy Aquarium
14%inclusion21 decks153 decks
13%synergy
Meat Locker // Drowned Diner
13%inclusion20 decks150 decks
13%synergy
Touch the Spirit Realm
13%inclusion20 decks153 decks
11%synergy
Nowhere to Run
13%inclusion20 decks153 decks
12%synergy
Secrets of the Dead
12%inclusion19 decks153 decks
12%synergy
One with the Multiverse
12%inclusion18 decks153 decks
7%synergy
Funeral Room // Awakening Hall
12%inclusion18 decks153 decks
11%synergy
Battles
Invasion of Theros
10%inclusion15 decks153 decks
8%synergy
Planeswalkers
Teferi, Time Raveler
7.2%inclusion11 decks153 decks
-1%synergy
Ashiok, Dream Render
5.2%inclusion8 decks153 decks
4%synergy
Utility Lands
Bojuka Bog
33%inclusion50 decks153 decks
6%synergy
Otawara, Soaring City
18%inclusion28 decks153 decks
-1%synergy
Reliquary Tower
15%inclusion23 decks153 decks
-19%synergy
Takenuma, Abandoned Mire
14%inclusion21 decks153 decks
7%synergy
Cephalid Coliseum
13%inclusion20 decks153 decks
9%synergy
Nephalia Drownyard
10%inclusion15 decks153 decks
9%synergy
Halimar Depths
9.2%inclusion14 decks153 decks
4%synergy
Urborg, Tomb of Yawgmoth
8.5%inclusion13 decks153 decks
-5%synergy
Adagia, Windswept Bastion
8.3%inclusion8 decks96 decks
6%synergy
Ancient Tomb
7.8%inclusion12 decks153 decks
-5%synergy
Serra's Sanctum
7.2%inclusion11 decks153 decks
5%synergy
Urza's Saga
6.5%inclusion10 decks153 decks
-5%synergy
Temple of the False God
5.9%inclusion9 decks153 decks
-2%synergy
Mana Artifacts
Arcane Signet
87%inclusion133 decks153 decks
-1%synergy
Sol Ring
86%inclusion131 decks153 decks
-4%synergy
Talisman of Dominance
48%inclusion74 decks153 decks
-1%synergy
Talisman of Progress
40%inclusion61 decks153 decks
-4%synergy
Talisman of Hierarchy
40%inclusion61 decks153 decks
-4%synergy
Azorius Signet
37%inclusion56 decks153 decks
6%synergy
Orzhov Signet
33%inclusion51 decks153 decks
1%synergy
Dimir Signet
26%inclusion40 decks153 decks
-5%synergy
Fellwar Stone
25%inclusion39 decks153 decks
-8%synergy
Mind Stone
14%inclusion21 decks153 decks
2%synergy
Commander's Sphere
9.2%inclusion14 decks153 decks
-9%synergy
Lotus Petal
7.8%inclusion12 decks153 decks
-3%synergy
Mana Vault
7.8%inclusion12 decks153 decks
-1%synergy
Chromatic Lantern
5.2%inclusion8 decks153 decks
-8%synergy
Mox Opal
5.2%inclusion8 decks153 decks
-3%synergy
Mox Diamond
5.2%inclusion8 decks153 decks
-2%synergy
Lands
Island
96%inclusion147 decks153 decks
3%synergy
Plains
95%inclusion145 decks153 decks
3%synergy
Command Tower
94%inclusion144 decks153 decks
2%synergy
Swamp
94%inclusion144 decks153 decks
2%synergy
Arcane Sanctum
61%inclusion94 decks153 decks
7%synergy
Caves of Koilos
56%inclusion85 decks153 decks
20%synergy
Adarkar Wastes
51%inclusion78 decks153 decks
19%synergy
Exotic Orchard
50%inclusion76 decks153 decks
-9%synergy
Underground River
48%inclusion73 decks153 decks
14%synergy
Glacial Fortress
44%inclusion68 decks153 decks
2%synergy
Hallowed Fountain
44%inclusion67 decks153 decks
-7%synergy
Valgavoth's Lair
42%inclusion64 decks153 decks
39%synergy
Watery Grave
42%inclusion64 decks153 decks
-9%synergy
Godless Shrine
41%inclusion63 decks153 decks
-10%synergy
Polluted Delta
39%inclusion59 decks153 decks
1%synergy
Isolated Chapel
37%inclusion56 decks153 decks
-4%synergy
Drowned Catacomb
36%inclusion55 decks153 decks
-1%synergy
Flooded Strand
36%inclusion55 decks153 decks
-2%synergy
Raffine's Tower
35%inclusion54 decks153 decks
-6%synergy
Marsh Flats
33%inclusion51 decks153 decks
-3%synergy
Prairie Stream
31%inclusion48 decks153 decks
-9%synergy
Undercity Sewers
29%inclusion45 decks153 decks
15%synergy
Shadowy Backstreet
29%inclusion44 decks153 decks
16%synergy
Meticulous Archive
29%inclusion44 decks153 decks
15%synergy
Sunken Hollow
29%inclusion44 decks153 decks
-11%synergy
Sea of Clouds
27%inclusion41 decks153 decks
-8%synergy
Deserted Beach
25%inclusion39 decks153 decks
5%synergy
Contaminated Landscape
25%inclusion38 decks153 decks
11%synergy
Vault of Champions
24%inclusion37 decks153 decks
-8%synergy
Azorius Chancery
24%inclusion36 decks153 decks
10%synergy
Terramorphic Expanse
24%inclusion36 decks153 decks
8%synergy
Shipwreck Marsh
23%inclusion35 decks153 decks
2%synergy
Morphic Pool
23%inclusion35 decks153 decks
-11%synergy
Dimir Aqueduct
22%inclusion34 decks153 decks
9%synergy
Evolving Wilds
22%inclusion34 decks153 decks
-3%synergy
Temple of Enlightenment
22%inclusion33 decks153 decks
6%synergy
Orzhov Basilica
22%inclusion33 decks153 decks
6%synergy
Obscura Storefront
21%inclusion32 decks153 decks
11%synergy
Gloomlake Verge
21%inclusion32 decks153 decks
10%synergy
Floodfarm Verge
21%inclusion32 decks153 decks
10%synergy
Temple of Deceit
20%inclusion31 decks153 decks
3%synergy
Temple of Silence
20%inclusion30 decks153 decks
1%synergy
Shattered Sanctum
17%inclusion26 decks153 decks
1%synergy
Fabled Passage
16%inclusion24 decks153 decks
8%synergy
Tainted Field
15%inclusion23 decks153 decks
8%synergy
Tainted Isle
14%inclusion22 decks153 decks
8%synergy
Darkwater Catacombs
14%inclusion21 decks153 decks
-1%synergy
City of Brass
13%inclusion20 decks153 decks
-2%synergy
Port Town
12%inclusion19 decks153 decks
-5%synergy
Ash Barrens
12%inclusion18 decks153 decks
1%synergy
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