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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Utility Artifacts
Enchantments
Battles
Planeswalkers
Utility Lands
Mana Artifacts
Lands
Back to Top
Noggle the Mind
8.5%inclusion4 decks47 decks
8%synergy
Paramecia Coloniex
3.2%inclusion1 decks31 decks
3%synergy
The Cloning of Shredder
2.3%inclusion1 decks43 decks
2%synergy
Ninja Teen
2.3%inclusion1 decks43 decks
-1%synergy
Weather Maker
2.3%inclusion1 decks43 decks
2%synergy
High Synergy Cards
Ripples of Undeath
73%inclusion109 decks150 decks
70%synergy
Inquisitive Glimmer
77%inclusion116 decks150 decks
70%synergy
Mesa Enchantress
73%inclusion109 decks150 decks
64%synergy
Entity Tracker
67%inclusion101 decks150 decks
61%synergy
Gravebreaker Lamia
62%inclusion93 decks150 decks
61%synergy
Demon of Fate's Design
61%inclusion92 decks150 decks
56%synergy
Starfield Mystic
61%inclusion92 decks150 decks
55%synergy
Scrabbling Skullcrab
53%inclusion79 decks150 decks
52%synergy
Hall of Heliod's Generosity
65%inclusion97 decks150 decks
52%synergy
Animate Dead
59%inclusion89 decks150 decks
50%synergy
Top Cards
Doomwake Giant
54%inclusion81 decks150 decks
48%synergy
Overlord of the Floodpits
53%inclusion79 decks150 decks
49%synergy
Fear of Sleep Paralysis
51%inclusion77 decks150 decks
46%synergy
Dress Down
49%inclusion73 decks150 decks
46%synergy
Overlord of the Balemurk
47%inclusion70 decks150 decks
45%synergy
Sphere of Safety
47%inclusion70 decks150 decks
37%synergy
Mystic Remora
46%inclusion69 decks150 decks
25%synergy
Fear of Impostors
45%inclusion67 decks150 decks
43%synergy
Swords to Plowshares
45%inclusion67 decks150 decks
-23%synergy
Secret Arcade // Dusty Parlor
45%inclusion67 decks150 decks
40%synergy
Game Changers
Smothering Tithe
37%inclusion56 decks150 decks
6%synergy
Rhystic Study
32%inclusion48 decks150 decks
1%synergy
Enlightened Tutor
15%inclusion23 decks150 decks
-4%synergy
Necropotence
15%inclusion22 decks150 decks
8%synergy
Demonic Tutor
14%inclusion21 decks150 decks
-7%synergy
Thassa's Oracle
12%inclusion18 decks150 decks
3%synergy
Vampiric Tutor
12%inclusion18 decks150 decks
-5%synergy
Mystical Tutor
11%inclusion16 decks150 decks
0%synergy
Fierce Guardianship
10%inclusion15 decks150 decks
-10%synergy
Cyclonic Rift
8.0%inclusion12 decks150 decks
-16%synergy
Creatures
Zur, Eternal Schemer
43%inclusion65 decks150 decks
40%synergy
Victor, Valgavoth's Seneschal
42%inclusion63 decks150 decks
40%synergy
Ondu Spiritdancer
41%inclusion62 decks150 decks
35%synergy
Ghostly Dancers
33%inclusion49 decks150 decks
30%synergy
Zur the Enchanter
31%inclusion47 decks150 decks
26%synergy
Silent Hallcreeper
28%inclusion42 decks150 decks
24%synergy
Enduring Curiosity
27%inclusion40 decks150 decks
19%synergy
Grim Guardian
25%inclusion38 decks150 decks
23%synergy
Heliod, the Radiant Dawn
25%inclusion38 decks150 decks
22%synergy
Soaring Lightbringer
25%inclusion37 decks150 decks
20%synergy
Aminatou, Veil Piercer
23%inclusion34 decks150 decks
21%synergy
Archon of Sun's Grace
22%inclusion33 decks150 decks
17%synergy
Mindwrack Harpy
22%inclusion33 decks150 decks
22%synergy
Sage of Mysteries
21%inclusion32 decks150 decks
21%synergy
Moon-Blessed Cleric
19%inclusion28 decks150 decks
14%synergy
Archetype of Imagination
18%inclusion27 decks150 decks
13%synergy
Alseid of Life's Bounty
18%inclusion27 decks150 decks
17%synergy
Overlord of the Mistmoors
17%inclusion26 decks150 decks
15%synergy
Skullsnap Nuisance
17%inclusion25 decks150 decks
16%synergy
Ancient Cellarspawn
17%inclusion25 decks150 decks
14%synergy
Abdel Adrian, Gorion's Ward
17%inclusion25 decks150 decks
15%synergy
Hedron Crab
16%inclusion24 decks150 decks
15%synergy
Balemurk Leech
15%inclusion23 decks150 decks
15%synergy
Athreos, Shroud-Veiled
15%inclusion22 decks150 decks
10%synergy
Gremlin Tamer
15%inclusion22 decks150 decks
14%synergy
Esper Sentinel
13%inclusion19 decks150 decks
-15%synergy
Starnheim Courser
12%inclusion18 decks150 decks
8%synergy
Laboratory Maniac
12%inclusion18 decks150 decks
9%synergy
Nashi, Searcher in the Dark
12%inclusion18 decks150 decks
11%synergy
Emet-Selch of the Third Seat
12%inclusion12 decks102 decks
2%synergy
Phenax, God of Deception
11%inclusion17 decks150 decks
11%synergy
Summon: Bahamut
11%inclusion11 decks102 decks
9%synergy
Witch Enchanter
11%inclusion16 decks150 decks
4%synergy
Spirited Companion
11%inclusion16 decks150 decks
9%synergy
Fear of Infinity
10%inclusion15 decks150 decks
9%synergy
Stenn, Paranoid Partisan
10%inclusion15 decks150 decks
9%synergy
Lotho, Corrupt Shirriff
10%inclusion15 decks150 decks
-7%synergy
Grand Abolisher
9.3%inclusion14 decks150 decks
-5%synergy
Summon: Yojimbo
8.8%inclusion9 decks102 decks
8%synergy
Hullbreaker Horror
8.7%inclusion13 decks150 decks
3%synergy
Ledger Shredder
8.7%inclusion13 decks150 decks
0%synergy
Millikin
8.7%inclusion13 decks150 decks
8%synergy
Fear of Surveillance
8.0%inclusion12 decks150 decks
8%synergy
Stitcher's Supplier
8.0%inclusion12 decks150 decks
7%synergy
Valgavoth, Terror Eater
8.0%inclusion12 decks150 decks
5%synergy
Neerdiv, Devious Diver
7.6%inclusion10 decks132 decks
7%synergy
Displacer Kitten
7.3%inclusion11 decks150 decks
0%synergy
Auramancer
7.3%inclusion11 decks150 decks
4%synergy
Valley Floodcaller
6.7%inclusion10 decks150 decks
3%synergy
Nightmare Shepherd
6.7%inclusion10 decks150 decks
4%synergy
Instants
Counterspell
33%inclusion50 decks150 decks
-8%synergy
Entomb
31%inclusion46 decks150 decks
24%synergy
Path to Exile
26%inclusion39 decks150 decks
-16%synergy
Void Rend
23%inclusion35 decks150 decks
-11%synergy
Arcane Denial
22%inclusion33 decks150 decks
2%synergy
An Offer You Can't Refuse
21%inclusion32 decks150 decks
-6%synergy
Dark Ritual
19%inclusion29 decks150 decks
0%synergy
Otherworldly Gaze
15%inclusion22 decks150 decks
12%synergy
Dovin's Veto
14%inclusion21 decks150 decks
-12%synergy
Thirst for Meaning
14%inclusion21 decks150 decks
13%synergy
Frantic Search
12%inclusion18 decks150 decks
-6%synergy
Inkshield
12%inclusion18 decks150 decks
2%synergy
Negate
11%inclusion17 decks150 decks
-5%synergy
Silence
10%inclusion15 decks150 decks
0%synergy
Swan Song
10%inclusion15 decks150 decks
-10%synergy
Fell the Profane
9.3%inclusion14 decks150 decks
1%synergy
Faithful Mending
9.3%inclusion14 decks150 decks
6%synergy
Sink into Stupor
8.7%inclusion13 decks150 decks
-4%synergy
Cabal Ritual
8.0%inclusion12 decks150 decks
5%synergy
Demonic Consultation
7.3%inclusion11 decks150 decks
-1%synergy
Anguished Unmaking
7.3%inclusion11 decks150 decks
-18%synergy
Utter End
6.7%inclusion10 decks150 decks
0%synergy
Mindbreak Trap
6.0%inclusion9 decks150 decks
-1%synergy
Borne Upon a Wind
6.0%inclusion9 decks150 decks
1%synergy
Tainted Pact
5.3%inclusion8 decks150 decks
-2%synergy
Mana Drain
5.3%inclusion8 decks150 decks
-12%synergy
Thought Scour
5.3%inclusion8 decks150 decks
4%synergy
Get Out
5.3%inclusion8 decks150 decks
5%synergy
Withering Torment
5.3%inclusion8 decks150 decks
4%synergy
Sorceries
Sevinne's Reclamation
42%inclusion63 decks150 decks
33%synergy
Redress Fate
33%inclusion49 decks150 decks
27%synergy
Extinguish All Hope
21%inclusion32 decks150 decks
20%synergy
Singularity Rupture
20%inclusion19 decks94 decks
18%synergy
Windfall
19%inclusion29 decks150 decks
6%synergy
Dance of the Manse
19%inclusion29 decks150 decks
16%synergy
Reanimate
19%inclusion28 decks150 decks
3%synergy
Resurgent Belief
15%inclusion23 decks150 decks
13%synergy
Toxic Deluge
15%inclusion23 decks150 decks
-4%synergy
Time Wipe
15%inclusion22 decks150 decks
8%synergy
Idyllic Tutor
12%inclusion18 decks150 decks
8%synergy
Glimpse the Unthinkable
11%inclusion17 decks150 decks
11%synergy
Space-Time Anomaly
11%inclusion10 decks91 decks
9%synergy
Damn
9.3%inclusion14 decks150 decks
-11%synergy
Replenish
8.7%inclusion13 decks150 decks
7%synergy
Brilliant Restoration
8.7%inclusion13 decks150 decks
7%synergy
Traumatize
8.7%inclusion13 decks150 decks
8%synergy
Demonic Counsel
7.3%inclusion11 decks150 decks
6%synergy
Supreme Verdict
6.7%inclusion10 decks150 decks
-8%synergy
Austere Command
6.7%inclusion10 decks150 decks
-2%synergy
Unmarked Grave
6.7%inclusion10 decks150 decks
5%synergy
Ponder
6.0%inclusion9 decks150 decks
-3%synergy
Feed the Swarm
6.0%inclusion9 decks150 decks
3%synergy
Buried Alive
6.0%inclusion9 decks150 decks
2%synergy
Terminus
5.3%inclusion8 decks150 decks
1%synergy
Utility Artifacts
Mesmeric Orb
18%inclusion27 decks150 decks
17%synergy
Cloud Key
10%inclusion15 decks150 decks
7%synergy
Keys to the House
8.7%inclusion13 decks150 decks
8%synergy
Lightning Greaves
8.7%inclusion13 decks150 decks
-14%synergy
Wayfarer's Bauble
8.0%inclusion12 decks150 decks
0%synergy
Perpetual Timepiece
6.7%inclusion10 decks150 decks
6%synergy
The One Ring
6.7%inclusion10 decks150 decks
-6%synergy
Wishclaw Talisman
6.7%inclusion10 decks150 decks
-1%synergy
Crucible of Worlds
5.3%inclusion8 decks150 decks
4%synergy
Enchantments
Seal of Cleansing
43%inclusion65 decks150 decks
42%synergy
Necromancy
43%inclusion64 decks150 decks
38%synergy
Starfield of Nyx
43%inclusion64 decks150 decks
39%synergy
Cemetery Tampering
40%inclusion60 decks150 decks
39%synergy
Propaganda
39%inclusion59 decks150 decks
12%synergy
Sigil of the Empty Throne
37%inclusion56 decks150 decks
31%synergy
Mirrormade
37%inclusion56 decks150 decks
28%synergy
Grasp of Fate
37%inclusion55 decks150 decks
31%synergy
Ghostly Prison
37%inclusion55 decks150 decks
15%synergy
Amphibian Downpour
32%inclusion48 decks150 decks
27%synergy
Estrid's Invocation
30%inclusion45 decks150 decks
25%synergy
Stillness in Motion
30%inclusion33 decks110 decks
30%synergy
Blind Obedience
27%inclusion41 decks150 decks
15%synergy
Cacophony Unleashed
27%inclusion40 decks150 decks
25%synergy
Darksteel Mutation
26%inclusion39 decks150 decks
20%synergy
Defiled Crypt // Cadaver Lab
26%inclusion39 decks150 decks
25%synergy
Polluted Cistern // Dim Oubliette
25%inclusion37 decks150 decks
24%synergy
Dance of the Dead
24%inclusion36 decks150 decks
22%synergy
Court of Cunning
24%inclusion36 decks150 decks
23%synergy
The Tale of Tamiyo
24%inclusion36 decks150 decks
24%synergy
Monologue Tax
23%inclusion35 decks150 decks
17%synergy
Extravagant Replication
23%inclusion34 decks150 decks
18%synergy
Restricted Office // Lecture Hall
23%inclusion34 decks150 decks
21%synergy
Out of the Tombs
21%inclusion31 decks150 decks
20%synergy
Ethereal Armor
21%inclusion31 decks150 decks
16%synergy
Central Elevator // Promising Stairs
20%inclusion30 decks150 decks
19%synergy
All That Glitters
20%inclusion30 decks150 decks
11%synergy
Bottomless Pool // Locker Room
20%inclusion30 decks150 decks
18%synergy
Phyrexian Arena
19%inclusion29 decks150 decks
5%synergy
Copy Enchantment
19%inclusion28 decks150 decks
14%synergy
Sheltered by Ghosts
19%inclusion28 decks150 decks
16%synergy
Imprisoned in the Moon
18%inclusion27 decks150 decks
11%synergy
Mirror Room // Fractured Realm
18%inclusion27 decks150 decks
16%synergy
Seal of Removal
18%inclusion27 decks150 decks
17%synergy
Shark Typhoon
17%inclusion26 decks150 decks
12%synergy
Teval's Judgment
17%inclusion19 decks114 decks
16%synergy
Black Market Connections
16%inclusion24 decks150 decks
2%synergy
Hallowed Haunting
16%inclusion24 decks150 decks
14%synergy
Greater Auramancy
16%inclusion24 decks150 decks
12%synergy
Cramped Vents // Access Maze
15%inclusion23 decks150 decks
13%synergy
Timely Ward
15%inclusion23 decks150 decks
10%synergy
The Meathook Massacre
15%inclusion22 decks150 decks
11%synergy
Underwater Tunnel // Slimy Aquarium
14%inclusion21 decks150 decks
14%synergy
Dazzling Theater // Prop Room
14%inclusion21 decks150 decks
13%synergy
Touch the Spirit Realm
13%inclusion20 decks150 decks
11%synergy
Meat Locker // Drowned Diner
13%inclusion19 decks147 decks
12%synergy
Funeral Room // Awakening Hall
13%inclusion19 decks150 decks
12%synergy
Secrets of the Dead
13%inclusion19 decks150 decks
12%synergy
Nowhere to Run
12%inclusion18 decks150 decks
11%synergy
Derelict Attic // Widow's Walk
12%inclusion17 decks147 decks
11%synergy
Battles
Invasion of Theros
10%inclusion15 decks150 decks
8%synergy
Planeswalkers
Ashiok, Dream Render
6.0%inclusion9 decks150 decks
4%synergy
Teferi, Time Raveler
6.0%inclusion9 decks150 decks
-2%synergy
Utility Lands
Bojuka Bog
33%inclusion50 decks150 decks
6%synergy
Otawara, Soaring City
17%inclusion26 decks150 decks
-2%synergy
Reliquary Tower
15%inclusion22 decks150 decks
-19%synergy
Takenuma, Abandoned Mire
14%inclusion21 decks150 decks
8%synergy
Cephalid Coliseum
13%inclusion19 decks150 decks
9%synergy
Nephalia Drownyard
10%inclusion15 decks150 decks
10%synergy
Halimar Depths
9.3%inclusion14 decks150 decks
5%synergy
Urborg, Tomb of Yawgmoth
8.0%inclusion12 decks150 decks
-5%synergy
Adagia, Windswept Bastion
7.5%inclusion7 decks93 decks
5%synergy
Ancient Tomb
7.3%inclusion11 decks150 decks
-5%synergy
Serra's Sanctum
6.7%inclusion10 decks150 decks
5%synergy
Temple of the False God
6.7%inclusion10 decks150 decks
-1%synergy
Urza's Saga
6.0%inclusion9 decks150 decks
-6%synergy
Dakmor Salvage
5.3%inclusion8 decks150 decks
5%synergy
Mana Artifacts
Arcane Signet
87%inclusion130 decks150 decks
-1%synergy
Sol Ring
87%inclusion130 decks150 decks
-3%synergy
Talisman of Dominance
47%inclusion70 decks150 decks
-3%synergy
Talisman of Progress
39%inclusion59 decks150 decks
-4%synergy
Talisman of Hierarchy
38%inclusion57 decks150 decks
-6%synergy
Azorius Signet
37%inclusion56 decks150 decks
6%synergy
Orzhov Signet
34%inclusion51 decks150 decks
1%synergy
Dimir Signet
25%inclusion38 decks150 decks
-6%synergy
Fellwar Stone
25%inclusion37 decks150 decks
-9%synergy
Mind Stone
16%inclusion24 decks150 decks
4%synergy
Commander's Sphere
9.3%inclusion14 decks150 decks
-9%synergy
Mana Vault
6.7%inclusion10 decks150 decks
-2%synergy
Lotus Petal
6.0%inclusion9 decks150 decks
-4%synergy
Chromatic Lantern
6.0%inclusion9 decks150 decks
-7%synergy
Lands
Island
97%inclusion145 decks150 decks
4%synergy
Plains
95%inclusion143 decks150 decks
4%synergy
Swamp
95%inclusion142 decks150 decks
3%synergy
Command Tower
94%inclusion141 decks150 decks
1%synergy
Arcane Sanctum
61%inclusion92 decks150 decks
7%synergy
Caves of Koilos
57%inclusion86 decks150 decks
22%synergy
Adarkar Wastes
52%inclusion78 decks150 decks
20%synergy
Exotic Orchard
49%inclusion74 decks150 decks
-9%synergy
Underground River
49%inclusion73 decks150 decks
15%synergy
Glacial Fortress
44%inclusion66 decks150 decks
2%synergy
Hallowed Fountain
42%inclusion63 decks150 decks
-8%synergy
Watery Grave
41%inclusion62 decks150 decks
-9%synergy
Valgavoth's Lair
41%inclusion61 decks150 decks
38%synergy
Godless Shrine
40%inclusion60 decks150 decks
-11%synergy
Polluted Delta
38%inclusion57 decks150 decks
0%synergy
Raffine's Tower
35%inclusion53 decks150 decks
-6%synergy
Isolated Chapel
35%inclusion53 decks150 decks
-5%synergy
Flooded Strand
35%inclusion53 decks150 decks
-3%synergy
Drowned Catacomb
34%inclusion51 decks150 decks
-3%synergy
Marsh Flats
33%inclusion50 decks150 decks
-3%synergy
Prairie Stream
31%inclusion46 decks150 decks
-10%synergy
Undercity Sewers
30%inclusion45 decks150 decks
16%synergy
Meticulous Archive
29%inclusion43 decks150 decks
15%synergy
Sunken Hollow
28%inclusion42 decks150 decks
-12%synergy
Shadowy Backstreet
27%inclusion41 decks150 decks
15%synergy
Sea of Clouds
27%inclusion41 decks150 decks
-8%synergy
Azorius Chancery
26%inclusion39 decks150 decks
12%synergy
Contaminated Landscape
26%inclusion39 decks150 decks
12%synergy
Terramorphic Expanse
25%inclusion37 decks150 decks
9%synergy
Deserted Beach
25%inclusion37 decks150 decks
4%synergy
Dimir Aqueduct
24%inclusion36 decks150 decks
11%synergy
Evolving Wilds
24%inclusion36 decks150 decks
-1%synergy
Orzhov Basilica
24%inclusion36 decks150 decks
9%synergy
Vault of Champions
24%inclusion36 decks150 decks
-9%synergy
Morphic Pool
23%inclusion35 decks150 decks
-11%synergy
Shipwreck Marsh
23%inclusion34 decks150 decks
2%synergy
Temple of Enlightenment
23%inclusion34 decks150 decks
6%synergy
Obscura Storefront
21%inclusion32 decks150 decks
12%synergy
Temple of Deceit
21%inclusion31 decks150 decks
3%synergy
Temple of Silence
21%inclusion31 decks150 decks
2%synergy
Floodfarm Verge
21%inclusion31 decks150 decks
10%synergy
Gloomlake Verge
20%inclusion30 decks150 decks
9%synergy
Shattered Sanctum
17%inclusion25 decks150 decks
0%synergy
Fabled Passage
15%inclusion23 decks150 decks
8%synergy
Tainted Field
15%inclusion23 decks150 decks
8%synergy
Tainted Isle
15%inclusion22 decks150 decks
8%synergy
Darkwater Catacombs
14%inclusion21 decks150 decks
-1%synergy
City of Brass
13%inclusion19 decks150 decks
-2%synergy
Port Town
12%inclusion18 decks150 decks
-5%synergy
Ash Barrens
12%inclusion18 decks150 decks
1%synergy
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