The Master of Keys (Commander) - Core Mill

The Master of Keys
Rank #306
21decks
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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
Utility Lands
Mana Artifacts
Lands
Back to Top
Noggle the Mind
25%inclusion1 decks4 decks
25%synergy
High Synergy Cards
Inquisitive Glimmer
86%inclusion18 decks21 decks
78%synergy
Starfield Mystic
76%inclusion16 decks21 decks
70%synergy
Scrabbling Skullcrab
62%inclusion13 decks21 decks
61%synergy
Doomwake Giant
67%inclusion14 decks21 decks
61%synergy
Fear of Impostors
62%inclusion13 decks21 decks
60%synergy
Entity Tracker
67%inclusion14 decks21 decks
60%synergy
Demon of Fate's Design
62%inclusion13 decks21 decks
56%synergy
Mesa Enchantress
62%inclusion13 decks21 decks
53%synergy
Dress Down
52%inclusion11 decks21 decks
50%synergy
Fear of Sleep Paralysis
52%inclusion11 decks21 decks
47%synergy
Top Cards
Secret Arcade // Dusty Parlor
48%inclusion10 decks21 decks
43%synergy
Ondu Spiritdancer
48%inclusion10 decks21 decks
41%synergy
Defiled Crypt // Cadaver Lab
48%inclusion10 decks21 decks
47%synergy
Grasp of Fate
43%inclusion9 decks21 decks
37%synergy
Overlord of the Floodpits
43%inclusion9 decks21 decks
39%synergy
Victor, Valgavoth's Seneschal
43%inclusion9 decks21 decks
41%synergy
Cemetery Tampering
43%inclusion9 decks21 decks
42%synergy
Monologue Tax
43%inclusion9 decks21 decks
37%synergy
Swords to Plowshares
43%inclusion9 decks21 decks
-25%synergy
Cacophony Unleashed
38%inclusion8 decks21 decks
36%synergy
Creatures
Gravebreaker Lamia
38%inclusion8 decks21 decks
37%synergy
Soaring Lightbringer
38%inclusion8 decks21 decks
33%synergy
Silent Hallcreeper
38%inclusion8 decks21 decks
34%synergy
Overlord of the Balemurk
33%inclusion7 decks21 decks
31%synergy
Aminatou, Veil Piercer
33%inclusion7 decks21 decks
32%synergy
Heliod, the Radiant Dawn
33%inclusion7 decks21 decks
30%synergy
Ghostly Dancers
33%inclusion7 decks21 decks
31%synergy
Zur, Eternal Schemer
33%inclusion7 decks21 decks
30%synergy
Enduring Curiosity
29%inclusion6 decks21 decks
21%synergy
Fear of Surveillance
24%inclusion5 decks21 decks
23%synergy
Moon-Blessed Cleric
24%inclusion5 decks21 decks
19%synergy
Athreos, Shroud-Veiled
24%inclusion5 decks21 decks
19%synergy
Alseid of Life's Bounty
24%inclusion5 decks21 decks
22%synergy
Archetype of Imagination
24%inclusion5 decks21 decks
19%synergy
The Mindskinner
19%inclusion4 decks21 decks
18%synergy
Skullsnap Nuisance
19%inclusion4 decks21 decks
19%synergy
Spirited Companion
19%inclusion4 decks21 decks
17%synergy
Zur the Enchanter
19%inclusion4 decks21 decks
14%synergy
Creeping Peeper
19%inclusion4 decks21 decks
19%synergy
Starnheim Courser
14%inclusion3 decks21 decks
10%synergy
Phenax, God of Deception
14%inclusion3 decks21 decks
14%synergy
Lotho, Corrupt Shirriff
14%inclusion3 decks21 decks
-3%synergy
Ashiok's Reaper
14%inclusion3 decks21 decks
14%synergy
Boggart Trawler
14%inclusion3 decks21 decks
11%synergy
Overlord of the Mistmoors
14%inclusion3 decks21 decks
12%synergy
Appendage Amalgam
14%inclusion3 decks21 decks
14%synergy
Ancient Cellarspawn
14%inclusion3 decks21 decks
11%synergy
Grim Guardian
14%inclusion3 decks21 decks
12%synergy
Abdel Adrian, Gorion's Ward
14%inclusion3 decks21 decks
13%synergy
Mindwrack Harpy
14%inclusion3 decks21 decks
14%synergy
Arvinox, the Mind Flail
14%inclusion3 decks21 decks
13%synergy
Nashi, Searcher in the Dark
14%inclusion3 decks21 decks
14%synergy
Nightmare Shepherd
14%inclusion3 decks21 decks
12%synergy
Hope Estheim
11%inclusion2 decks18 decks
10%synergy
Eidolon of Astral Winds
11%inclusion2 decks19 decks
10%synergy
Solemn Simulacrum
10%inclusion2 decks21 decks
-5%synergy
Metamorphosis Fanatic
10%inclusion2 decks21 decks
5%synergy
Fear of Infinity
10%inclusion2 decks21 decks
9%synergy
Witch Enchanter
10%inclusion2 decks21 decks
3%synergy
Fear of Isolation
10%inclusion2 decks21 decks
9%synergy
Fear of Failed Tests
10%inclusion2 decks21 decks
9%synergy
Fear of Lost Teeth
10%inclusion2 decks21 decks
9%synergy
Mulldrifter
10%inclusion2 decks21 decks
5%synergy
Zellix, Sanity Flayer
10%inclusion2 decks21 decks
9%synergy
Hydroelectric Specimen
10%inclusion2 decks21 decks
7%synergy
Ruin Crab
10%inclusion2 decks21 decks
8%synergy
Archon of Sun's Grace
10%inclusion2 decks21 decks
5%synergy
Fear of Abduction
10%inclusion2 decks21 decks
9%synergy
Fear of the Dark
10%inclusion2 decks21 decks
9%synergy
Enduring Innocence
10%inclusion2 decks21 decks
8%synergy
Instants
Thirst for Meaning
33%inclusion7 decks21 decks
32%synergy
Arcane Denial
33%inclusion7 decks21 decks
13%synergy
Otherworldly Gaze
33%inclusion7 decks21 decks
31%synergy
Counterspell
29%inclusion6 decks21 decks
-13%synergy
Path to Exile
29%inclusion6 decks21 decks
-14%synergy
Inkshield
19%inclusion4 decks21 decks
10%synergy
Fell the Profane
14%inclusion3 decks21 decks
6%synergy
Frantic Search
14%inclusion3 decks21 decks
-3%synergy
Return to Dust
14%inclusion3 decks21 decks
11%synergy
An Offer You Can't Refuse
14%inclusion3 decks21 decks
-13%synergy
Dark Ritual
14%inclusion3 decks21 decks
-5%synergy
Sink into Stupor
14%inclusion3 decks21 decks
2%synergy
Utter End
14%inclusion3 decks21 decks
8%synergy
Swallowed by Leviathan
12%inclusion2 decks17 decks
11%synergy
Dreams of Laguna
11%inclusion2 decks18 decks
11%synergy
Dovin's Veto
10%inclusion2 decks21 decks
-16%synergy
Brainstorm
10%inclusion2 decks21 decks
-8%synergy
Fact or Fiction
10%inclusion2 decks21 decks
6%synergy
Drown in Dreams
10%inclusion2 decks21 decks
9%synergy
Waterlogged Teachings
10%inclusion2 decks21 decks
5%synergy
Generous Gift
10%inclusion2 decks21 decks
-5%synergy
Swan Song
10%inclusion2 decks21 decks
-10%synergy
Sejiri Shelter
10%inclusion2 decks21 decks
8%synergy
Dig Through Time
10%inclusion2 decks21 decks
4%synergy
Sorceries
Redress Fate
38%inclusion8 decks21 decks
32%synergy
Singularity Rupture
27%inclusion4 decks15 decks
24%synergy
Space-Time Anomaly
27%inclusion4 decks15 decks
25%synergy
Windfall
24%inclusion5 decks21 decks
10%synergy
Sevinne's Reclamation
24%inclusion5 decks21 decks
15%synergy
Dance of the Manse
24%inclusion5 decks21 decks
20%synergy
Resurgent Belief
19%inclusion4 decks21 decks
17%synergy
Time Wipe
19%inclusion4 decks21 decks
12%synergy
Demonic Counsel
19%inclusion4 decks21 decks
18%synergy
Reanimate
19%inclusion4 decks21 decks
3%synergy
Commune with Evil
14%inclusion3 decks21 decks
14%synergy
Glimpse the Unthinkable
14%inclusion3 decks21 decks
14%synergy
Extinguish All Hope
14%inclusion3 decks21 decks
13%synergy
Damn
14%inclusion3 decks21 decks
-6%synergy
Ponder
10%inclusion2 decks21 decks
0%synergy
Fascination
10%inclusion2 decks21 decks
9%synergy
Terminus
10%inclusion2 decks21 decks
5%synergy
Replenish
10%inclusion2 decks21 decks
8%synergy
Brilliant Restoration
10%inclusion2 decks21 decks
8%synergy
Cut Your Losses
10%inclusion2 decks21 decks
9%synergy
Treasure Cruise
10%inclusion2 decks21 decks
6%synergy
Final Vengeance
10%inclusion2 decks21 decks
9%synergy
Unending Whisper
5.6%inclusion1 decks18 decks
5%synergy
Winternight Stories
5.6%inclusion1 decks18 decks
5%synergy
Inspiration from Beyond
5.3%inclusion1 decks19 decks
5%synergy
Utility Artifacts
Keys to the House
14%inclusion3 decks21 decks
14%synergy
Archaeomancer's Map
14%inclusion3 decks21 decks
9%synergy
Mesmeric Orb
10%inclusion2 decks21 decks
8%synergy
Ghost Vacuum
10%inclusion2 decks21 decks
9%synergy
Mask of the Schemer
10%inclusion2 decks21 decks
9%synergy
Wayfarer's Bauble
10%inclusion2 decks21 decks
2%synergy
Bident of Thassa
10%inclusion2 decks21 decks
1%synergy
The Water Crystal
5.6%inclusion1 decks18 decks
4%synergy
Riverchurn Monument
5.3%inclusion1 decks19 decks
5%synergy
Aether Syphon
5.3%inclusion1 decks19 decks
5%synergy
Enchantments
Sigil of the Empty Throne
38%inclusion8 decks21 decks
32%synergy
Sphere of Safety
38%inclusion8 decks21 decks
29%synergy
The Tale of Tamiyo
38%inclusion8 decks21 decks
38%synergy
Amphibian Downpour
38%inclusion8 decks21 decks
34%synergy
Animate Dead
38%inclusion8 decks21 decks
28%synergy
Propaganda
38%inclusion8 decks21 decks
11%synergy
Ripples of Undeath
33%inclusion7 decks21 decks
31%synergy
Necromancy
33%inclusion7 decks21 decks
29%synergy
Mirrormade
33%inclusion7 decks21 decks
24%synergy
Central Elevator // Promising Stairs
33%inclusion7 decks21 decks
33%synergy
Nowhere to Run
33%inclusion7 decks21 decks
32%synergy
Mirror Room // Fractured Realm
33%inclusion7 decks21 decks
31%synergy
Seal of Cleansing
33%inclusion7 decks21 decks
32%synergy
Estrid's Invocation
29%inclusion6 decks21 decks
24%synergy
Mystic Remora
29%inclusion6 decks21 decks
7%synergy
Shark Typhoon
29%inclusion6 decks21 decks
23%synergy
Derelict Attic // Widow's Walk
29%inclusion6 decks21 decks
28%synergy
Polluted Cistern // Dim Oubliette
29%inclusion6 decks21 decks
28%synergy
Ghostly Prison
29%inclusion6 decks21 decks
7%synergy
Stillness in Motion
28%inclusion5 decks18 decks
27%synergy
Cramped Vents // Access Maze
24%inclusion5 decks21 decks
21%synergy
Restricted Office // Lecture Hall
24%inclusion5 decks21 decks
22%synergy
Ethereal Armor
24%inclusion5 decks21 decks
19%synergy
Timely Ward
24%inclusion5 decks21 decks
19%synergy
Darksteel Mutation
19%inclusion4 decks21 decks
13%synergy
Imprisoned in the Moon
19%inclusion4 decks21 decks
12%synergy
Unable to Scream
19%inclusion4 decks21 decks
18%synergy
Underwater Tunnel // Slimy Aquarium
19%inclusion4 decks21 decks
19%synergy
Surgical Suite // Hospital Room
19%inclusion4 decks21 decks
19%synergy
Extravagant Replication
19%inclusion4 decks21 decks
14%synergy
The Eldest Reborn
19%inclusion4 decks21 decks
17%synergy
Meat Locker // Drowned Diner
19%inclusion4 decks21 decks
19%synergy
Starfield of Nyx
19%inclusion4 decks21 decks
15%synergy
Funeral Room // Awakening Hall
19%inclusion4 decks21 decks
18%synergy
All That Glitters
19%inclusion4 decks21 decks
10%synergy
Dazzling Theater // Prop Room
19%inclusion4 decks21 decks
18%synergy
Seal of Removal
19%inclusion4 decks21 decks
18%synergy
Bottomless Pool // Locker Room
19%inclusion4 decks21 decks
17%synergy
Black Market Connections
19%inclusion4 decks21 decks
5%synergy
Dance of the Dead
14%inclusion3 decks21 decks
12%synergy
Chronic Flooding
14%inclusion3 decks21 decks
14%synergy
Touch the Spirit Realm
14%inclusion3 decks21 decks
12%synergy
Glasswing Grace
14%inclusion3 decks21 decks
11%synergy
Blind Obedience
14%inclusion3 decks21 decks
2%synergy
Unholy Annex // Ritual Chamber
14%inclusion3 decks21 decks
14%synergy
Chthonian Nightmare
14%inclusion3 decks21 decks
14%synergy
Cast Out
14%inclusion3 decks21 decks
11%synergy
The Restoration of Eiganjo
14%inclusion3 decks21 decks
14%synergy
Static Prison
14%inclusion3 decks21 decks
14%synergy
Teval's Judgment
11%inclusion2 decks18 decks
10%synergy
Utility Lands
Bojuka Bog
57%inclusion12 decks21 decks
30%synergy
Hall of Heliod's Generosity
48%inclusion10 decks21 decks
35%synergy
Halimar Depths
19%inclusion4 decks21 decks
14%synergy
Takenuma, Abandoned Mire
19%inclusion4 decks21 decks
13%synergy
Cephalid Coliseum
19%inclusion4 decks21 decks
15%synergy
Reliquary Tower
14%inclusion3 decks21 decks
-20%synergy
Otawara, Soaring City
14%inclusion3 decks21 decks
-5%synergy
Nephalia Drownyard
10%inclusion2 decks21 decks
9%synergy
Urborg, Tomb of Yawgmoth
10%inclusion2 decks21 decks
-4%synergy
Mistrise Village
5.6%inclusion1 decks18 decks
2%synergy
Mana Artifacts
Arcane Signet
86%inclusion18 decks21 decks
-2%synergy
Sol Ring
81%inclusion17 decks21 decks
-9%synergy
Orzhov Signet
57%inclusion12 decks21 decks
23%synergy
Azorius Signet
57%inclusion12 decks21 decks
25%synergy
Dimir Signet
38%inclusion8 decks21 decks
6%synergy
Talisman of Progress
33%inclusion7 decks21 decks
-10%synergy
Talisman of Dominance
29%inclusion6 decks21 decks
-21%synergy
Commander's Sphere
24%inclusion5 decks21 decks
5%synergy
Fellwar Stone
19%inclusion4 decks21 decks
-15%synergy
Talisman of Hierarchy
19%inclusion4 decks21 decks
-25%synergy
Mind Stone
14%inclusion3 decks21 decks
2%synergy
Lands
Island
100%inclusion21 decks21 decks
7%synergy
Command Tower
95%inclusion20 decks21 decks
3%synergy
Swamp
90%inclusion19 decks21 decks
-1%synergy
Plains
90%inclusion19 decks21 decks
-1%synergy
Arcane Sanctum
71%inclusion15 decks21 decks
17%synergy
Exotic Orchard
67%inclusion14 decks21 decks
8%synergy
Caves of Koilos
57%inclusion12 decks21 decks
22%synergy
Evolving Wilds
57%inclusion12 decks21 decks
32%synergy
Adarkar Wastes
57%inclusion12 decks21 decks
26%synergy
Terramorphic Expanse
52%inclusion11 decks21 decks
36%synergy
Temple of Deceit
43%inclusion9 decks21 decks
25%synergy
Prairie Stream
43%inclusion9 decks21 decks
2%synergy
Underground River
43%inclusion9 decks21 decks
10%synergy
Temple of Enlightenment
43%inclusion9 decks21 decks
26%synergy
Temple of Silence
43%inclusion9 decks21 decks
23%synergy
Contaminated Landscape
38%inclusion8 decks21 decks
24%synergy
Valgavoth's Lair
38%inclusion8 decks21 decks
35%synergy
Tainted Field
33%inclusion7 decks21 decks
26%synergy
Glacial Fortress
29%inclusion6 decks21 decks
-12%synergy
Azorius Chancery
29%inclusion6 decks21 decks
14%synergy
Sunken Hollow
29%inclusion6 decks21 decks
-11%synergy
Isolated Chapel
29%inclusion6 decks21 decks
-11%synergy
Orzhov Basilica
29%inclusion6 decks21 decks
13%synergy
Obscura Storefront
29%inclusion6 decks21 decks
18%synergy
Tainted Isle
24%inclusion5 decks21 decks
17%synergy
Dimir Aqueduct
24%inclusion5 decks21 decks
10%synergy
Path of Ancestry
24%inclusion5 decks21 decks
-4%synergy
Shineshadow Snarl
24%inclusion5 decks21 decks
13%synergy
Deserted Beach
24%inclusion5 decks21 decks
3%synergy
Drowned Catacomb
24%inclusion5 decks21 decks
-12%synergy
Myriad Landscape
19%inclusion4 decks21 decks
10%synergy
Irrigated Farmland
19%inclusion4 decks21 decks
12%synergy
Port Town
19%inclusion4 decks21 decks
2%synergy
Ash Barrens
19%inclusion4 decks21 decks
8%synergy
Thriving Isle
19%inclusion4 decks21 decks
15%synergy
Skycloud Expanse
19%inclusion4 decks21 decks
4%synergy
Darkwater Catacombs
19%inclusion4 decks21 decks
5%synergy
Thriving Moor
19%inclusion4 decks21 decks
15%synergy
Thriving Heath
19%inclusion4 decks21 decks
15%synergy
Hallowed Fountain
19%inclusion4 decks21 decks
-30%synergy
Fell the Profane
14%inclusion3 decks21 decks
6%synergy
Fetid Heath
14%inclusion3 decks21 decks
2%synergy
Shipwreck Marsh
14%inclusion3 decks21 decks
-6%synergy
Sea of Clouds
14%inclusion3 decks21 decks
-21%synergy
Raffine's Tower
14%inclusion3 decks21 decks
-27%synergy
Boggart Trawler
14%inclusion3 decks21 decks
11%synergy
Godless Shrine
14%inclusion3 decks21 decks
-36%synergy
Glasswing Grace
14%inclusion3 decks21 decks
11%synergy
Sink into Stupor
14%inclusion3 decks21 decks
2%synergy
Morphic Pool
14%inclusion3 decks21 decks
-20%synergy
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