The Master of Keys (Commander) - Core Mill

The Master of Keys
Rank #301
26decks
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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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Super Intelligence
33%inclusion1 decks3 decks
33%synergy
Exhibition Tidecaller
17%inclusion1 decks6 decks
16%synergy
Restoration Seminar
17%inclusion1 decks6 decks
15%synergy
Jadzi, Steward of Fate
17%inclusion1 decks6 decks
17%synergy
High Synergy Cards
Inquisitive Glimmer
88%inclusion23 decks26 decks
81%synergy
Starfield Mystic
73%inclusion19 decks26 decks
67%synergy
Entity Tracker
65%inclusion17 decks26 decks
59%synergy
Fear of Impostors
58%inclusion15 decks26 decks
56%synergy
Doomwake Giant
62%inclusion16 decks26 decks
56%synergy
Scrabbling Skullcrab
54%inclusion14 decks26 decks
53%synergy
Demon of Fate's Design
58%inclusion15 decks26 decks
52%synergy
Mesa Enchantress
58%inclusion15 decks26 decks
49%synergy
Victor, Valgavoth's Seneschal
50%inclusion13 decks26 decks
48%synergy
The Tale of Tamiyo
46%inclusion12 decks26 decks
46%synergy
Top Cards
Defiled Crypt // Cadaver Lab
46%inclusion12 decks26 decks
45%synergy
Grasp of Fate
42%inclusion11 decks26 decks
36%synergy
Gravebreaker Lamia
42%inclusion11 decks26 decks
41%synergy
Cemetery Tampering
42%inclusion11 decks26 decks
42%synergy
Fear of Sleep Paralysis
42%inclusion11 decks26 decks
37%synergy
Ghostly Dancers
42%inclusion11 decks26 decks
40%synergy
Dress Down
38%inclusion10 decks26 decks
36%synergy
Cacophony Unleashed
35%inclusion9 decks26 decks
33%synergy
Soaring Lightbringer
35%inclusion9 decks26 decks
30%synergy
Thirst for Meaning
35%inclusion9 decks26 decks
33%synergy
Creatures
Aminatou, Veil Piercer
35%inclusion9 decks26 decks
33%synergy
Overlord of the Floodpits
31%inclusion8 decks26 decks
27%synergy
Silent Hallcreeper
31%inclusion8 decks26 decks
26%synergy
Heliod, the Radiant Dawn
31%inclusion8 decks26 decks
27%synergy
Zur, Eternal Schemer
31%inclusion8 decks26 decks
28%synergy
Ondu Spiritdancer
31%inclusion8 decks26 decks
25%synergy
Overlord of the Balemurk
27%inclusion7 decks26 decks
25%synergy
Skullsnap Nuisance
27%inclusion7 decks26 decks
27%synergy
Enduring Curiosity
27%inclusion7 decks26 decks
19%synergy
Fear of Surveillance
23%inclusion6 decks26 decks
23%synergy
Creeping Peeper
23%inclusion6 decks26 decks
23%synergy
Alseid of Life's Bounty
23%inclusion6 decks26 decks
22%synergy
Mindwrack Harpy
23%inclusion6 decks26 decks
23%synergy
Killian, Decisive Mentor
20%inclusion2 decks10 decks
19%synergy
Overlord of the Mistmoors
19%inclusion5 decks26 decks
17%synergy
Moon-Blessed Cleric
19%inclusion5 decks26 decks
15%synergy
Spirited Companion
19%inclusion5 decks26 decks
17%synergy
Archetype of Imagination
19%inclusion5 decks26 decks
15%synergy
Nashi, Searcher in the Dark
19%inclusion5 decks26 decks
19%synergy
Zur the Enchanter
19%inclusion5 decks26 decks
14%synergy
Eiganjo Dynastorian
17%inclusion1 decks6 decks
15%synergy
Starnheim Courser
15%inclusion4 decks26 decks
12%synergy
Appendage Amalgam
15%inclusion4 decks26 decks
15%synergy
Nightmare Shepherd
15%inclusion4 decks26 decks
13%synergy
Grim Guardian
15%inclusion4 decks26 decks
13%synergy
Stenn, Paranoid Partisan
12%inclusion3 decks26 decks
10%synergy
Phenax, God of Deception
12%inclusion3 decks26 decks
11%synergy
The Mindskinner
12%inclusion3 decks26 decks
11%synergy
Archon of Sun's Grace
12%inclusion3 decks26 decks
7%synergy
Sage of Mysteries
12%inclusion3 decks26 decks
11%synergy
Ashiok's Reaper
12%inclusion3 decks26 decks
11%synergy
Boggart Trawler
12%inclusion3 decks26 decks
8%synergy
Athreos, Shroud-Veiled
12%inclusion3 decks26 decks
7%synergy
Ancient Cellarspawn
12%inclusion3 decks26 decks
9%synergy
Millikin
12%inclusion3 decks26 decks
11%synergy
Hope Estheim
8.7%inclusion2 decks23 decks
7%synergy
Summon: Primal Odin
8.7%inclusion2 decks23 decks
4%synergy
Summon: Yojimbo
8.7%inclusion2 decks23 decks
8%synergy
Eidolon of Astral Winds
8.3%inclusion2 decks24 decks
8%synergy
Twilight Diviner
8.3%inclusion1 decks12 decks
7%synergy
Fear of Infinity
7.7%inclusion2 decks26 decks
7%synergy
Witch Enchanter
7.7%inclusion2 decks26 decks
1%synergy
Wall of Reverence
7.7%inclusion2 decks26 decks
7%synergy
Fear of Isolation
7.7%inclusion2 decks26 decks
7%synergy
Lotho, Corrupt Shirriff
7.7%inclusion2 decks26 decks
-9%synergy
Mulldrifter
7.7%inclusion2 decks26 decks
4%synergy
Fear of Failed Tests
7.7%inclusion2 decks26 decks
7%synergy
Fear of Lost Teeth
7.7%inclusion2 decks26 decks
8%synergy
Doom Whisperer
7.7%inclusion2 decks26 decks
6%synergy
Zellix, Sanity Flayer
7.7%inclusion2 decks26 decks
7%synergy
Instants
Swords to Plowshares
35%inclusion9 decks26 decks
-33%synergy
Otherworldly Gaze
35%inclusion9 decks26 decks
32%synergy
Frantic Search
27%inclusion7 decks26 decks
8%synergy
Arcane Denial
27%inclusion7 decks26 decks
7%synergy
Counterspell
27%inclusion7 decks26 decks
-15%synergy
Path to Exile
27%inclusion7 decks26 decks
-15%synergy
Swallowed by Leviathan
18%inclusion4 decks22 decks
18%synergy
Negate
15%inclusion4 decks26 decks
-1%synergy
Void Rend
15%inclusion4 decks26 decks
-19%synergy
Faithful Mending
15%inclusion4 decks26 decks
12%synergy
Inkshield
15%inclusion4 decks26 decks
5%synergy
Dreams of Laguna
13%inclusion3 decks23 decks
13%synergy
Fell the Profane
12%inclusion3 decks26 decks
2%synergy
Drown in the Loch
12%inclusion3 decks26 decks
10%synergy
Dovin's Veto
12%inclusion3 decks26 decks
-15%synergy
Get Out
12%inclusion3 decks26 decks
11%synergy
Sink into Stupor
12%inclusion3 decks26 decks
-2%synergy
Drown in Dreams
12%inclusion3 decks26 decks
11%synergy
Waterlogged Teachings
12%inclusion3 decks26 decks
7%synergy
Generous Gift
12%inclusion3 decks26 decks
-2%synergy
An Offer You Can't Refuse
7.7%inclusion2 decks26 decks
-20%synergy
Return to Dust
7.7%inclusion2 decks26 decks
4%synergy
Dawn's Truce
7.7%inclusion2 decks26 decks
3%synergy
Songs of the Damned
7.7%inclusion2 decks26 decks
7%synergy
Fact or Fiction
7.7%inclusion2 decks26 decks
4%synergy
Dark Ritual
7.7%inclusion2 decks26 decks
-12%synergy
Aetherize
7.7%inclusion2 decks26 decks
3%synergy
Swan Song
7.7%inclusion2 decks26 decks
-12%synergy
Infernal Grasp
7.7%inclusion2 decks26 decks
6%synergy
Anguished Unmaking
7.7%inclusion2 decks26 decks
-18%synergy
Utter End
7.7%inclusion2 decks26 decks
2%synergy
Sejiri Shelter
7.7%inclusion2 decks26 decks
6%synergy
Live or Die
7.7%inclusion2 decks26 decks
8%synergy
Fracture
7.7%inclusion2 decks26 decks
4%synergy
Dig Through Time
7.7%inclusion2 decks26 decks
2%synergy
Amazing Acrobatics
5.6%inclusion1 decks18 decks
5%synergy
Sorceries
Redress Fate
31%inclusion8 decks26 decks
25%synergy
Singularity Rupture
30%inclusion6 decks20 decks
28%synergy
Space-Time Anomaly
30%inclusion6 decks20 decks
28%synergy
Dance of the Manse
23%inclusion6 decks26 decks
20%synergy
Glimpse the Unthinkable
19%inclusion5 decks26 decks
19%synergy
Extinguish All Hope
19%inclusion5 decks26 decks
18%synergy
Windfall
15%inclusion4 decks26 decks
2%synergy
Resurgent Belief
15%inclusion4 decks26 decks
13%synergy
Sevinne's Reclamation
15%inclusion4 decks26 decks
7%synergy
Time Wipe
15%inclusion4 decks26 decks
9%synergy
Demonic Counsel
15%inclusion4 decks26 decks
14%synergy
Reanimate
15%inclusion4 decks26 decks
-1%synergy
Commune with Evil
12%inclusion3 decks26 decks
11%synergy
Damn
12%inclusion3 decks26 decks
-9%synergy
Asinine Antics
7.7%inclusion2 decks26 decks
7%synergy
Fascination
7.7%inclusion2 decks26 decks
8%synergy
Split Up
7.7%inclusion2 decks26 decks
7%synergy
Bond of Insight
7.7%inclusion2 decks26 decks
8%synergy
Replenish
7.7%inclusion2 decks26 decks
6%synergy
Cut Your Losses
7.7%inclusion2 decks26 decks
7%synergy
Treasure Cruise
7.7%inclusion2 decks26 decks
5%synergy
Starfall Invocation
7.7%inclusion2 decks26 decks
6%synergy
Brilliant Restoration
7.7%inclusion2 decks26 decks
6%synergy
Living Death
7.7%inclusion2 decks26 decks
3%synergy
Rite of the Moth
7.7%inclusion2 decks26 decks
8%synergy
Final Vengeance
7.7%inclusion2 decks26 decks
8%synergy
Traumatize
7.7%inclusion2 decks26 decks
7%synergy
Utility Artifacts
Keys to the House
15%inclusion4 decks26 decks
15%synergy
Archaeomancer's Map
12%inclusion3 decks26 decks
6%synergy
Mesmeric Orb
7.7%inclusion2 decks26 decks
7%synergy
Matzalantli, the Great Door
7.7%inclusion2 decks26 decks
6%synergy
Wayfarer's Bauble
7.7%inclusion2 decks26 decks
1%synergy
Ghost Vacuum
7.7%inclusion2 decks26 decks
7%synergy
Mask of the Schemer
7.7%inclusion2 decks26 decks
7%synergy
Bident of Thassa
7.7%inclusion2 decks26 decks
-1%synergy
Enchantments
Central Elevator // Promising Stairs
35%inclusion9 decks26 decks
34%synergy
Seal of Cleansing
35%inclusion9 decks26 decks
33%synergy
Animate Dead
35%inclusion9 decks26 decks
25%synergy
Secret Arcade // Dusty Parlor
35%inclusion9 decks26 decks
30%synergy
Propaganda
35%inclusion9 decks26 decks
6%synergy
Darksteel Mutation
31%inclusion8 decks26 decks
25%synergy
Sigil of the Empty Throne
31%inclusion8 decks26 decks
25%synergy
Estrid's Invocation
31%inclusion8 decks26 decks
26%synergy
Shark Typhoon
31%inclusion8 decks26 decks
25%synergy
Sphere of Safety
31%inclusion8 decks26 decks
21%synergy
Monologue Tax
31%inclusion8 decks26 decks
24%synergy
Restricted Office // Lecture Hall
31%inclusion8 decks26 decks
29%synergy
Polluted Cistern // Dim Oubliette
31%inclusion8 decks26 decks
30%synergy
Mirror Room // Fractured Realm
31%inclusion8 decks26 decks
29%synergy
Stillness in Motion
30%inclusion7 decks23 decks
30%synergy
Ripples of Undeath
27%inclusion7 decks26 decks
24%synergy
Necromancy
27%inclusion7 decks26 decks
22%synergy
Amphibian Downpour
27%inclusion7 decks26 decks
22%synergy
All That Glitters
27%inclusion7 decks26 decks
19%synergy
Nowhere to Run
27%inclusion7 decks26 decks
26%synergy
Ethereal Armor
27%inclusion7 decks26 decks
22%synergy
Ghostly Prison
27%inclusion7 decks26 decks
4%synergy
Cramped Vents // Access Maze
23%inclusion6 decks26 decks
21%synergy
Underwater Tunnel // Slimy Aquarium
23%inclusion6 decks26 decks
23%synergy
Imprisoned in the Moon
23%inclusion6 decks26 decks
16%synergy
Mirrormade
23%inclusion6 decks26 decks
13%synergy
Meat Locker // Drowned Diner
23%inclusion6 decks26 decks
23%synergy
Derelict Attic // Widow's Walk
23%inclusion6 decks26 decks
23%synergy
Funeral Room // Awakening Hall
23%inclusion6 decks26 decks
22%synergy
Sheltered by Ghosts
23%inclusion6 decks26 decks
20%synergy
Unable to Scream
19%inclusion5 decks26 decks
18%synergy
The Eldest Reborn
19%inclusion5 decks26 decks
17%synergy
Surgical Suite // Hospital Room
19%inclusion5 decks26 decks
19%synergy
Mystic Remora
19%inclusion5 decks26 decks
-1%synergy
Bottomless Pool // Locker Room
19%inclusion5 decks26 decks
17%synergy
Dazzling Theater // Prop Room
19%inclusion5 decks26 decks
18%synergy
Seal of Removal
19%inclusion5 decks26 decks
19%synergy
Changing Loyalty
17%inclusion1 decks6 decks
16%synergy
Glasswing Grace
15%inclusion4 decks26 decks
13%synergy
Extravagant Replication
15%inclusion4 decks26 decks
10%synergy
Chronic Flooding
15%inclusion4 decks26 decks
15%synergy
Touch the Spirit Realm
15%inclusion4 decks26 decks
13%synergy
Timely Ward
15%inclusion4 decks26 decks
11%synergy
Starfield of Nyx
15%inclusion4 decks26 decks
11%synergy
The Restoration of Eiganjo
15%inclusion4 decks26 decks
15%synergy
Static Prison
15%inclusion4 decks26 decks
15%synergy
Secrets of the Dead
15%inclusion4 decks26 decks
15%synergy
Unholy Annex // Ritual Chamber
15%inclusion4 decks26 decks
15%synergy
Black Market Connections
15%inclusion4 decks26 decks
0%synergy
Dance of the Dead
12%inclusion3 decks26 decks
9%synergy
Battles
Invasion of Theros
7.7%inclusion2 decks26 decks
6%synergy
Utility Lands
Bojuka Bog
42%inclusion11 decks26 decks
16%synergy
Hall of Heliod's Generosity
35%inclusion9 decks26 decks
22%synergy
Nephalia Drownyard
12%inclusion3 decks26 decks
11%synergy
Takenuma, Abandoned Mire
12%inclusion3 decks26 decks
5%synergy
Reliquary Tower
12%inclusion3 decks26 decks
-22%synergy
Cephalid Coliseum
12%inclusion3 decks26 decks
8%synergy
Creeping Tar Pit
7.7%inclusion2 decks26 decks
6%synergy
Halimar Depths
7.7%inclusion2 decks26 decks
3%synergy
Otawara, Soaring City
7.7%inclusion2 decks26 decks
-11%synergy
Mana Artifacts
Arcane Signet
85%inclusion22 decks26 decks
-3%synergy
Sol Ring
77%inclusion20 decks26 decks
-13%synergy
Orzhov Signet
50%inclusion13 decks26 decks
18%synergy
Azorius Signet
50%inclusion13 decks26 decks
20%synergy
Talisman of Progress
38%inclusion10 decks26 decks
-6%synergy
Dimir Signet
35%inclusion9 decks26 decks
5%synergy
Talisman of Dominance
19%inclusion5 decks26 decks
-31%synergy
Fellwar Stone
19%inclusion5 decks26 decks
-14%synergy
Talisman of Hierarchy
19%inclusion5 decks26 decks
-25%synergy
Commander's Sphere
15%inclusion4 decks26 decks
-2%synergy
Mind Stone
7.7%inclusion2 decks26 decks
-4%synergy
Lands
Island
100%inclusion26 decks26 decks
7%synergy
Command Tower
96%inclusion25 decks26 decks
4%synergy
Swamp
92%inclusion24 decks26 decks
0%synergy
Plains
92%inclusion24 decks26 decks
0%synergy
Arcane Sanctum
77%inclusion20 decks26 decks
23%synergy
Exotic Orchard
62%inclusion16 decks26 decks
3%synergy
Adarkar Wastes
62%inclusion16 decks26 decks
29%synergy
Caves of Koilos
58%inclusion15 decks26 decks
22%synergy
Underground River
54%inclusion14 decks26 decks
19%synergy
Terramorphic Expanse
50%inclusion13 decks26 decks
34%synergy
Evolving Wilds
50%inclusion13 decks26 decks
26%synergy
Prairie Stream
42%inclusion11 decks26 decks
2%synergy
Valgavoth's Lair
42%inclusion11 decks26 decks
40%synergy
Temple of Silence
42%inclusion11 decks26 decks
24%synergy
Glacial Fortress
38%inclusion10 decks26 decks
-5%synergy
Isolated Chapel
38%inclusion10 decks26 decks
-4%synergy
Temple of Enlightenment
38%inclusion10 decks26 decks
23%synergy
Contaminated Landscape
35%inclusion9 decks26 decks
21%synergy
Temple of Deceit
35%inclusion9 decks26 decks
18%synergy
Sunken Hollow
35%inclusion9 decks26 decks
-5%synergy
Tainted Field
31%inclusion8 decks26 decks
24%synergy
Drowned Catacomb
31%inclusion8 decks26 decks
-8%synergy
Fetid Heath
27%inclusion7 decks26 decks
13%synergy
Deserted Beach
27%inclusion7 decks26 decks
6%synergy
Azorius Chancery
23%inclusion6 decks26 decks
10%synergy
Port Town
23%inclusion6 decks26 decks
6%synergy
Shineshadow Snarl
23%inclusion6 decks26 decks
12%synergy
Obscura Storefront
23%inclusion6 decks26 decks
14%synergy
Watery Grave
23%inclusion6 decks26 decks
-28%synergy
Tainted Isle
19%inclusion5 decks26 decks
13%synergy
Dimir Aqueduct
19%inclusion5 decks26 decks
6%synergy
Ash Barrens
19%inclusion5 decks26 decks
9%synergy
Raffine's Tower
19%inclusion5 decks26 decks
-21%synergy
Orzhov Basilica
19%inclusion5 decks26 decks
4%synergy
Hallowed Fountain
19%inclusion5 decks26 decks
-32%synergy
Glasswing Grace
15%inclusion4 decks26 decks
13%synergy
Darkwater Catacombs
15%inclusion4 decks26 decks
1%synergy
Shipwreck Marsh
15%inclusion4 decks26 decks
-5%synergy
Sea of Clouds
15%inclusion4 decks26 decks
-19%synergy
Godless Shrine
15%inclusion4 decks26 decks
-36%synergy
Skycloud Expanse
15%inclusion4 decks26 decks
0%synergy
Path of Ancestry
15%inclusion4 decks26 decks
-13%synergy
Morphic Pool
15%inclusion4 decks26 decks
-18%synergy
Shattered Sanctum
15%inclusion4 decks26 decks
-2%synergy
Fell the Profane
12%inclusion3 decks26 decks
2%synergy
Undercity Sewers
12%inclusion3 decks26 decks
-3%synergy
Fabled Passage
12%inclusion3 decks26 decks
4%synergy
Myriad Landscape
12%inclusion3 decks26 decks
4%synergy
Irrigated Farmland
12%inclusion3 decks26 decks
4%synergy
Thriving Isle
12%inclusion3 decks26 decks
7%synergy
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