The Master of Keys (Commander) - Core Mill

The Master of Keys
Rank #303
27decks
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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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Mana Artifacts
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Super Intelligence
25%inclusion1 decks4 decks
25%synergy
High Synergy Cards
Inquisitive Glimmer
89%inclusion24 decks27 decks
82%synergy
Starfield Mystic
74%inclusion20 decks27 decks
68%synergy
Entity Tracker
67%inclusion18 decks27 decks
61%synergy
Doomwake Giant
63%inclusion17 decks27 decks
57%synergy
Scrabbling Skullcrab
56%inclusion15 decks27 decks
55%synergy
Fear of Impostors
56%inclusion15 decks27 decks
54%synergy
Demon of Fate's Design
59%inclusion16 decks27 decks
54%synergy
Mesa Enchantress
59%inclusion16 decks27 decks
51%synergy
The Tale of Tamiyo
48%inclusion13 decks27 decks
48%synergy
Victor, Valgavoth's Seneschal
48%inclusion13 decks27 decks
46%synergy
Top Cards
Grasp of Fate
44%inclusion12 decks27 decks
38%synergy
Gravebreaker Lamia
44%inclusion12 decks27 decks
43%synergy
Cemetery Tampering
44%inclusion12 decks27 decks
44%synergy
Defiled Crypt // Cadaver Lab
44%inclusion12 decks27 decks
44%synergy
Fear of Sleep Paralysis
41%inclusion11 decks27 decks
36%synergy
Dress Down
41%inclusion11 decks27 decks
39%synergy
Ghostly Dancers
41%inclusion11 decks27 decks
38%synergy
Seal of Cleansing
37%inclusion10 decks27 decks
36%synergy
Otherworldly Gaze
37%inclusion10 decks27 decks
35%synergy
Animate Dead
37%inclusion10 decks27 decks
27%synergy
Creatures
Overlord of the Floodpits
33%inclusion9 decks27 decks
30%synergy
Soaring Lightbringer
33%inclusion9 decks27 decks
29%synergy
Aminatou, Veil Piercer
33%inclusion9 decks27 decks
32%synergy
Zur, Eternal Schemer
33%inclusion9 decks27 decks
30%synergy
Ondu Spiritdancer
33%inclusion9 decks27 decks
27%synergy
Overlord of the Balemurk
30%inclusion8 decks27 decks
28%synergy
Silent Hallcreeper
30%inclusion8 decks27 decks
25%synergy
Heliod, the Radiant Dawn
30%inclusion8 decks27 decks
26%synergy
Skullsnap Nuisance
26%inclusion7 decks27 decks
26%synergy
Enduring Curiosity
26%inclusion7 decks27 decks
18%synergy
Fear of Surveillance
22%inclusion6 decks27 decks
22%synergy
Moon-Blessed Cleric
22%inclusion6 decks27 decks
18%synergy
Creeping Peeper
22%inclusion6 decks27 decks
22%synergy
Alseid of Life's Bounty
22%inclusion6 decks27 decks
21%synergy
Mindwrack Harpy
22%inclusion6 decks27 decks
22%synergy
Overlord of the Mistmoors
19%inclusion5 decks27 decks
17%synergy
Spirited Companion
19%inclusion5 decks27 decks
17%synergy
Archetype of Imagination
19%inclusion5 decks27 decks
14%synergy
Nashi, Searcher in the Dark
19%inclusion5 decks27 decks
18%synergy
Zur the Enchanter
19%inclusion5 decks27 decks
14%synergy
Killian, Decisive Mentor
18%inclusion2 decks11 decks
17%synergy
Starnheim Courser
15%inclusion4 decks27 decks
11%synergy
Appendage Amalgam
15%inclusion4 decks27 decks
15%synergy
Nightmare Shepherd
15%inclusion4 decks27 decks
12%synergy
Grim Guardian
15%inclusion4 decks27 decks
12%synergy
Exhibition Tidecaller
14%inclusion1 decks7 decks
14%synergy
Eiganjo Dynastorian
14%inclusion1 decks7 decks
13%synergy
Jadzi, Steward of Fate
14%inclusion1 decks7 decks
14%synergy
Stenn, Paranoid Partisan
11%inclusion3 decks27 decks
10%synergy
Phenax, God of Deception
11%inclusion3 decks27 decks
11%synergy
The Mindskinner
11%inclusion3 decks27 decks
10%synergy
Archon of Sun's Grace
11%inclusion3 decks27 decks
7%synergy
Sage of Mysteries
11%inclusion3 decks27 decks
11%synergy
Ashiok's Reaper
11%inclusion3 decks27 decks
11%synergy
Boggart Trawler
11%inclusion3 decks27 decks
8%synergy
Athreos, Shroud-Veiled
11%inclusion3 decks27 decks
7%synergy
Ancient Cellarspawn
11%inclusion3 decks27 decks
8%synergy
Millikin
11%inclusion3 decks27 decks
10%synergy
Summon: Primal Odin
8.3%inclusion2 decks24 decks
4%synergy
Summon: Yojimbo
8.3%inclusion2 decks24 decks
7%synergy
Hope Estheim
8.3%inclusion2 decks24 decks
7%synergy
Eidolon of Astral Winds
8.0%inclusion2 decks25 decks
8%synergy
Twilight Diviner
7.7%inclusion1 decks13 decks
6%synergy
Fear of Infinity
7.4%inclusion2 decks27 decks
7%synergy
Witch Enchanter
7.4%inclusion2 decks27 decks
0%synergy
Wall of Reverence
7.4%inclusion2 decks27 decks
7%synergy
Fear of Isolation
7.4%inclusion2 decks27 decks
7%synergy
Lotho, Corrupt Shirriff
7.4%inclusion2 decks27 decks
-10%synergy
Mulldrifter
7.4%inclusion2 decks27 decks
3%synergy
Fear of Failed Tests
7.4%inclusion2 decks27 decks
7%synergy
Instants
Thirst for Meaning
33%inclusion9 decks27 decks
32%synergy
Swords to Plowshares
33%inclusion9 decks27 decks
-34%synergy
Frantic Search
26%inclusion7 decks27 decks
7%synergy
Arcane Denial
26%inclusion7 decks27 decks
6%synergy
Counterspell
26%inclusion7 decks27 decks
-16%synergy
Path to Exile
26%inclusion7 decks27 decks
-16%synergy
Swallowed by Leviathan
17%inclusion4 decks23 decks
17%synergy
Negate
15%inclusion4 decks27 decks
-1%synergy
Void Rend
15%inclusion4 decks27 decks
-20%synergy
Faithful Mending
15%inclusion4 decks27 decks
11%synergy
Inkshield
15%inclusion4 decks27 decks
5%synergy
Dreams of Laguna
13%inclusion3 decks24 decks
12%synergy
Fell the Profane
11%inclusion3 decks27 decks
2%synergy
Drown in the Loch
11%inclusion3 decks27 decks
9%synergy
Dovin's Veto
11%inclusion3 decks27 decks
-15%synergy
Get Out
11%inclusion3 decks27 decks
11%synergy
Sink into Stupor
11%inclusion3 decks27 decks
-2%synergy
Drown in Dreams
11%inclusion3 decks27 decks
11%synergy
Waterlogged Teachings
11%inclusion3 decks27 decks
6%synergy
Generous Gift
11%inclusion3 decks27 decks
-3%synergy
An Offer You Can't Refuse
7.4%inclusion2 decks27 decks
-20%synergy
Entomb
7.4%inclusion2 decks27 decks
1%synergy
Return to Dust
7.4%inclusion2 decks27 decks
4%synergy
Dawn's Truce
7.4%inclusion2 decks27 decks
3%synergy
Songs of the Damned
7.4%inclusion2 decks27 decks
7%synergy
Fact or Fiction
7.4%inclusion2 decks27 decks
4%synergy
Dark Ritual
7.4%inclusion2 decks27 decks
-13%synergy
Aetherize
7.4%inclusion2 decks27 decks
3%synergy
Swan Song
7.4%inclusion2 decks27 decks
-13%synergy
Infernal Grasp
7.4%inclusion2 decks27 decks
6%synergy
Anguished Unmaking
7.4%inclusion2 decks27 decks
-18%synergy
Utter End
7.4%inclusion2 decks27 decks
1%synergy
Sejiri Shelter
7.4%inclusion2 decks27 decks
6%synergy
Live or Die
7.4%inclusion2 decks27 decks
7%synergy
Fracture
7.4%inclusion2 decks27 decks
4%synergy
Dig Through Time
7.4%inclusion2 decks27 decks
2%synergy
Amazing Acrobatics
5.3%inclusion1 decks19 decks
4%synergy
Sorceries
Redress Fate
33%inclusion9 decks27 decks
28%synergy
Singularity Rupture
29%inclusion6 decks21 decks
26%synergy
Space-Time Anomaly
29%inclusion6 decks21 decks
27%synergy
Dance of the Manse
22%inclusion6 decks27 decks
19%synergy
Resurgent Belief
19%inclusion5 decks27 decks
17%synergy
Sevinne's Reclamation
19%inclusion5 decks27 decks
10%synergy
Glimpse the Unthinkable
19%inclusion5 decks27 decks
18%synergy
Reanimate
19%inclusion5 decks27 decks
2%synergy
Extinguish All Hope
19%inclusion5 decks27 decks
17%synergy
Windfall
15%inclusion4 decks27 decks
2%synergy
Time Wipe
15%inclusion4 decks27 decks
9%synergy
Demonic Counsel
15%inclusion4 decks27 decks
14%synergy
Restoration Seminar
14%inclusion1 decks7 decks
13%synergy
Commune with Evil
11%inclusion3 decks27 decks
11%synergy
Damn
11%inclusion3 decks27 decks
-9%synergy
Asinine Antics
7.4%inclusion2 decks27 decks
7%synergy
Fascination
7.4%inclusion2 decks27 decks
7%synergy
Split Up
7.4%inclusion2 decks27 decks
6%synergy
Bond of Insight
7.4%inclusion2 decks27 decks
7%synergy
Replenish
7.4%inclusion2 decks27 decks
6%synergy
Cut Your Losses
7.4%inclusion2 decks27 decks
7%synergy
Treasure Cruise
7.4%inclusion2 decks27 decks
4%synergy
Starfall Invocation
7.4%inclusion2 decks27 decks
5%synergy
Brilliant Restoration
7.4%inclusion2 decks27 decks
6%synergy
Living Death
7.4%inclusion2 decks27 decks
3%synergy
Rite of the Moth
7.4%inclusion2 decks27 decks
7%synergy
Final Vengeance
7.4%inclusion2 decks27 decks
7%synergy
Traumatize
7.4%inclusion2 decks27 decks
7%synergy
Utility Artifacts
Keys to the House
15%inclusion4 decks27 decks
15%synergy
Wayfarer's Bauble
11%inclusion3 decks27 decks
4%synergy
Archaeomancer's Map
11%inclusion3 decks27 decks
5%synergy
Mesmeric Orb
7.4%inclusion2 decks27 decks
6%synergy
Matzalantli, the Great Door
7.4%inclusion2 decks27 decks
5%synergy
Ghost Vacuum
7.4%inclusion2 decks27 decks
7%synergy
Mask of the Schemer
7.4%inclusion2 decks27 decks
7%synergy
Lightning Greaves
7.4%inclusion2 decks27 decks
-15%synergy
Bident of Thassa
7.4%inclusion2 decks27 decks
-1%synergy
Enchantments
Secret Arcade // Dusty Parlor
37%inclusion10 decks27 decks
33%synergy
Propaganda
37%inclusion10 decks27 decks
8%synergy
Cacophony Unleashed
33%inclusion9 decks27 decks
32%synergy
Estrid's Invocation
33%inclusion9 decks27 decks
29%synergy
Central Elevator // Promising Stairs
33%inclusion9 decks27 decks
33%synergy
Sphere of Safety
33%inclusion9 decks27 decks
24%synergy
Darksteel Mutation
30%inclusion8 decks27 decks
24%synergy
Ripples of Undeath
30%inclusion8 decks27 decks
27%synergy
Sigil of the Empty Throne
30%inclusion8 decks27 decks
24%synergy
Necromancy
30%inclusion8 decks27 decks
25%synergy
Shark Typhoon
30%inclusion8 decks27 decks
24%synergy
Amphibian Downpour
30%inclusion8 decks27 decks
25%synergy
Monologue Tax
30%inclusion8 decks27 decks
23%synergy
Restricted Office // Lecture Hall
30%inclusion8 decks27 decks
28%synergy
Polluted Cistern // Dim Oubliette
30%inclusion8 decks27 decks
29%synergy
Mirror Room // Fractured Realm
30%inclusion8 decks27 decks
28%synergy
Ghostly Prison
30%inclusion8 decks27 decks
7%synergy
Stillness in Motion
29%inclusion7 decks24 decks
29%synergy
Mirrormade
26%inclusion7 decks27 decks
16%synergy
All That Glitters
26%inclusion7 decks27 decks
18%synergy
Nowhere to Run
26%inclusion7 decks27 decks
25%synergy
Ethereal Armor
26%inclusion7 decks27 decks
21%synergy
Cramped Vents // Access Maze
22%inclusion6 decks27 decks
20%synergy
Underwater Tunnel // Slimy Aquarium
22%inclusion6 decks27 decks
22%synergy
Imprisoned in the Moon
22%inclusion6 decks27 decks
15%synergy
Meat Locker // Drowned Diner
22%inclusion6 decks27 decks
22%synergy
Mystic Remora
22%inclusion6 decks27 decks
2%synergy
Derelict Attic // Widow's Walk
22%inclusion6 decks27 decks
22%synergy
Funeral Room // Awakening Hall
22%inclusion6 decks27 decks
21%synergy
Sheltered by Ghosts
22%inclusion6 decks27 decks
20%synergy
Unable to Scream
19%inclusion5 decks27 decks
18%synergy
The Eldest Reborn
19%inclusion5 decks27 decks
16%synergy
Touch the Spirit Realm
19%inclusion5 decks27 decks
16%synergy
Surgical Suite // Hospital Room
19%inclusion5 decks27 decks
18%synergy
Starfield of Nyx
19%inclusion5 decks27 decks
15%synergy
Secrets of the Dead
19%inclusion5 decks27 decks
18%synergy
Bottomless Pool // Locker Room
19%inclusion5 decks27 decks
17%synergy
Dazzling Theater // Prop Room
19%inclusion5 decks27 decks
17%synergy
Seal of Removal
19%inclusion5 decks27 decks
18%synergy
Dance of the Dead
15%inclusion4 decks27 decks
13%synergy
Glasswing Grace
15%inclusion4 decks27 decks
12%synergy
Extravagant Replication
15%inclusion4 decks27 decks
10%synergy
Chronic Flooding
15%inclusion4 decks27 decks
15%synergy
Timely Ward
15%inclusion4 decks27 decks
10%synergy
The Restoration of Eiganjo
15%inclusion4 decks27 decks
14%synergy
Static Prison
15%inclusion4 decks27 decks
14%synergy
Unholy Annex // Ritual Chamber
15%inclusion4 decks27 decks
14%synergy
Black Market Connections
15%inclusion4 decks27 decks
-0%synergy
Changing Loyalty
14%inclusion1 decks7 decks
13%synergy
Court of Cunning
11%inclusion3 decks27 decks
10%synergy
Battles
Invasion of Theros
7.4%inclusion2 decks27 decks
6%synergy
Utility Lands
Bojuka Bog
41%inclusion11 decks27 decks
14%synergy
Hall of Heliod's Generosity
33%inclusion9 decks27 decks
20%synergy
Halimar Depths
11%inclusion3 decks27 decks
7%synergy
Nephalia Drownyard
11%inclusion3 decks27 decks
11%synergy
Takenuma, Abandoned Mire
11%inclusion3 decks27 decks
5%synergy
Reliquary Tower
11%inclusion3 decks27 decks
-23%synergy
Cephalid Coliseum
11%inclusion3 decks27 decks
8%synergy
Creeping Tar Pit
7.4%inclusion2 decks27 decks
6%synergy
Otawara, Soaring City
7.4%inclusion2 decks27 decks
-12%synergy
Mana Artifacts
Arcane Signet
85%inclusion23 decks27 decks
-2%synergy
Sol Ring
78%inclusion21 decks27 decks
-12%synergy
Orzhov Signet
52%inclusion14 decks27 decks
20%synergy
Azorius Signet
52%inclusion14 decks27 decks
22%synergy
Talisman of Progress
41%inclusion11 decks27 decks
-4%synergy
Dimir Signet
37%inclusion10 decks27 decks
7%synergy
Talisman of Dominance
22%inclusion6 decks27 decks
-28%synergy
Talisman of Hierarchy
22%inclusion6 decks27 decks
-23%synergy
Fellwar Stone
19%inclusion5 decks27 decks
-15%synergy
Commander's Sphere
15%inclusion4 decks27 decks
-2%synergy
Mind Stone
11%inclusion3 decks27 decks
-1%synergy
Lands
Island
100%inclusion27 decks27 decks
7%synergy
Command Tower
96%inclusion26 decks27 decks
4%synergy
Swamp
93%inclusion25 decks27 decks
1%synergy
Plains
93%inclusion25 decks27 decks
1%synergy
Arcane Sanctum
78%inclusion21 decks27 decks
24%synergy
Adarkar Wastes
63%inclusion17 decks27 decks
30%synergy
Exotic Orchard
59%inclusion16 decks27 decks
0%synergy
Caves of Koilos
59%inclusion16 decks27 decks
23%synergy
Underground River
56%inclusion15 decks27 decks
21%synergy
Terramorphic Expanse
48%inclusion13 decks27 decks
33%synergy
Evolving Wilds
48%inclusion13 decks27 decks
24%synergy
Valgavoth's Lair
44%inclusion12 decks27 decks
42%synergy
Temple of Silence
44%inclusion12 decks27 decks
26%synergy
Glacial Fortress
41%inclusion11 decks27 decks
-3%synergy
Prairie Stream
41%inclusion11 decks27 decks
0%synergy
Isolated Chapel
41%inclusion11 decks27 decks
-1%synergy
Temple of Enlightenment
41%inclusion11 decks27 decks
25%synergy
Temple of Deceit
37%inclusion10 decks27 decks
20%synergy
Contaminated Landscape
33%inclusion9 decks27 decks
20%synergy
Tainted Field
33%inclusion9 decks27 decks
26%synergy
Sunken Hollow
33%inclusion9 decks27 decks
-6%synergy
Drowned Catacomb
30%inclusion8 decks27 decks
-9%synergy
Azorius Chancery
26%inclusion7 decks27 decks
13%synergy
Fetid Heath
26%inclusion7 decks27 decks
12%synergy
Deserted Beach
26%inclusion7 decks27 decks
5%synergy
Tainted Isle
22%inclusion6 decks27 decks
16%synergy
Dimir Aqueduct
22%inclusion6 decks27 decks
9%synergy
Port Town
22%inclusion6 decks27 decks
5%synergy
Orzhov Basilica
22%inclusion6 decks27 decks
8%synergy
Shineshadow Snarl
22%inclusion6 decks27 decks
11%synergy
Obscura Storefront
22%inclusion6 decks27 decks
13%synergy
Watery Grave
22%inclusion6 decks27 decks
-29%synergy
Ash Barrens
19%inclusion5 decks27 decks
8%synergy
Sea of Clouds
19%inclusion5 decks27 decks
-16%synergy
Raffine's Tower
19%inclusion5 decks27 decks
-22%synergy
Morphic Pool
19%inclusion5 decks27 decks
-15%synergy
Hallowed Fountain
19%inclusion5 decks27 decks
-32%synergy
Glasswing Grace
15%inclusion4 decks27 decks
12%synergy
Darkwater Catacombs
15%inclusion4 decks27 decks
-0%synergy
Shipwreck Marsh
15%inclusion4 decks27 decks
-6%synergy
Thriving Isle
15%inclusion4 decks27 decks
11%synergy
Godless Shrine
15%inclusion4 decks27 decks
-37%synergy
Skycloud Expanse
15%inclusion4 decks27 decks
-0%synergy
Path of Ancestry
15%inclusion4 decks27 decks
-13%synergy
Thriving Moor
15%inclusion4 decks27 decks
11%synergy
Shattered Sanctum
15%inclusion4 decks27 decks
-3%synergy
Thriving Heath
15%inclusion4 decks27 decks
11%synergy
Gloomlake Verge
15%inclusion4 decks27 decks
4%synergy
Polluted Delta
15%inclusion4 decks27 decks
-23%synergy
Fell the Profane
11%inclusion3 decks27 decks
2%synergy
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