The Master of Keys (Commander) - Upgraded Mill

The Master of Keys
Rank #304
57decks
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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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Enchantments
Battles
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Utility Lands
Mana Artifacts
Lands
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Archnemesis
14%inclusion1 decks7 decks
14%synergy
Hidden Lair
13%inclusion1 decks8 decks
11%synergy
High Synergy Cards
Inquisitive Glimmer
86%inclusion49 decks57 decks
79%synergy
Ripples of Undeath
74%inclusion42 decks57 decks
71%synergy
Gravebreaker Lamia
70%inclusion40 decks57 decks
69%synergy
Entity Tracker
72%inclusion41 decks57 decks
66%synergy
Starfield Mystic
70%inclusion40 decks57 decks
64%synergy
Mesa Enchantress
68%inclusion39 decks57 decks
60%synergy
Animate Dead
68%inclusion39 decks57 decks
59%synergy
Scrabbling Skullcrab
60%inclusion34 decks57 decks
59%synergy
Demon of Fate's Design
61%inclusion35 decks57 decks
56%synergy
Dress Down
56%inclusion32 decks57 decks
54%synergy
Top Cards
Mirrormade
58%inclusion33 decks57 decks
48%synergy
Fear of Sleep Paralysis
58%inclusion33 decks57 decks
53%synergy
Doomwake Giant
58%inclusion33 decks57 decks
52%synergy
Necromancy
54%inclusion31 decks57 decks
50%synergy
Swords to Plowshares
54%inclusion31 decks57 decks
-13%synergy
Mystic Remora
51%inclusion29 decks57 decks
30%synergy
Sphere of Safety
51%inclusion29 decks57 decks
42%synergy
Cemetery Tampering
49%inclusion28 decks57 decks
48%synergy
Amphibian Downpour
49%inclusion28 decks57 decks
45%synergy
Ondu Spiritdancer
49%inclusion28 decks57 decks
43%synergy
Game Changers
Smothering Tithe
33%inclusion19 decks57 decks
3%synergy
Rhystic Study
18%inclusion10 decks57 decks
-13%synergy
Enlightened Tutor
16%inclusion9 decks57 decks
-3%synergy
Demonic Tutor
12%inclusion7 decks57 decks
-8%synergy
Consecrated Sphinx
8.8%inclusion5 decks57 decks
3%synergy
Serra's Sanctum
8.8%inclusion5 decks57 decks
7%synergy
Farewell
8.8%inclusion5 decks57 decks
-3%synergy
Teferi's Protection
7.0%inclusion4 decks57 decks
-9%synergy
Ancient Tomb
7.0%inclusion4 decks57 decks
-5%synergy
Necropotence
7.0%inclusion4 decks57 decks
1%synergy
Creatures
Overlord of the Floodpits
47%inclusion27 decks57 decks
44%synergy
Victor, Valgavoth's Seneschal
46%inclusion26 decks57 decks
44%synergy
Overlord of the Balemurk
44%inclusion25 decks57 decks
42%synergy
Zur, Eternal Schemer
42%inclusion24 decks57 decks
39%synergy
Fear of Impostors
37%inclusion21 decks57 decks
35%synergy
Silent Hallcreeper
33%inclusion19 decks57 decks
29%synergy
Heliod, the Radiant Dawn
33%inclusion19 decks57 decks
30%synergy
Ghostly Dancers
30%inclusion17 decks57 decks
27%synergy
Enduring Curiosity
26%inclusion15 decks57 decks
18%synergy
Grim Guardian
25%inclusion14 decks57 decks
22%synergy
Lotho, Corrupt Shirriff
23%inclusion13 decks57 decks
6%synergy
Sage of Mysteries
21%inclusion12 decks57 decks
21%synergy
Abdel Adrian, Gorion's Ward
21%inclusion12 decks57 decks
19%synergy
Mindwrack Harpy
21%inclusion12 decks57 decks
21%synergy
Archon of Sun's Grace
18%inclusion10 decks57 decks
13%synergy
Moon-Blessed Cleric
18%inclusion10 decks57 decks
13%synergy
Athreos, Shroud-Veiled
18%inclusion10 decks57 decks
13%synergy
Archetype of Imagination
18%inclusion10 decks57 decks
13%synergy
Zur the Enchanter
18%inclusion10 decks57 decks
13%synergy
Soaring Lightbringer
16%inclusion9 decks57 decks
11%synergy
Balemurk Leech
16%inclusion9 decks57 decks
15%synergy
Grand Abolisher
16%inclusion9 decks57 decks
1%synergy
Alseid of Life's Bounty
16%inclusion9 decks57 decks
14%synergy
Witch Enchanter
14%inclusion8 decks57 decks
7%synergy
Overlord of the Mistmoors
14%inclusion8 decks57 decks
12%synergy
Skullsnap Nuisance
14%inclusion8 decks57 decks
14%synergy
Ancient Cellarspawn
14%inclusion8 decks57 decks
11%synergy
Aminatou, Veil Piercer
14%inclusion8 decks57 decks
13%synergy
Hullbreaker Horror
14%inclusion8 decks57 decks
8%synergy
Eiganjo Dynastorian
13%inclusion2 decks15 decks
12%synergy
Starnheim Courser
12%inclusion7 decks57 decks
9%synergy
Esper Sentinel
12%inclusion7 decks57 decks
-15%synergy
Hedron Crab
12%inclusion7 decks57 decks
12%synergy
Ledger Shredder
12%inclusion7 decks57 decks
4%synergy
Emet-Selch of the Third Seat
12%inclusion5 decks43 decks
2%synergy
Doom Whisperer
11%inclusion6 decks57 decks
9%synergy
Laboratory Maniac
11%inclusion6 decks57 decks
7%synergy
Athreos, God of Passage
11%inclusion6 decks57 decks
9%synergy
Neerdiv, Devious Diver
11%inclusion6 decks57 decks
10%synergy
Nightmare Shepherd
11%inclusion6 decks57 decks
8%synergy
Fear of Infinity
8.8%inclusion5 decks57 decks
8%synergy
Stenn, Paranoid Partisan
8.8%inclusion5 decks57 decks
7%synergy
Valley Floodcaller
8.8%inclusion5 decks57 decks
5%synergy
Angel of Suffering
8.8%inclusion5 decks57 decks
9%synergy
Spirited Companion
8.8%inclusion5 decks57 decks
7%synergy
Twilight Diviner
8.0%inclusion2 decks25 decks
7%synergy
Syr Konrad, the Grim
7.0%inclusion4 decks57 decks
2%synergy
Auramancer
7.0%inclusion4 decks57 decks
4%synergy
Phenax, God of Deception
5.3%inclusion3 decks57 decks
5%synergy
Thassa's Oracle
5.3%inclusion3 decks57 decks
-4%synergy
Instants
Counterspell
47%inclusion27 decks57 decks
5%synergy
An Offer You Can't Refuse
46%inclusion26 decks57 decks
18%synergy
Arcane Denial
40%inclusion23 decks57 decks
20%synergy
Entomb
39%inclusion22 decks57 decks
32%synergy
Dark Ritual
37%inclusion21 decks57 decks
17%synergy
Path to Exile
35%inclusion20 decks57 decks
-7%synergy
Negate
21%inclusion12 decks57 decks
5%synergy
Void Rend
21%inclusion12 decks57 decks
-14%synergy
Swan Song
21%inclusion12 decks57 decks
1%synergy
Frantic Search
19%inclusion11 decks57 decks
1%synergy
Dovin's Veto
19%inclusion11 decks57 decks
-7%synergy
Anguished Unmaking
16%inclusion9 decks57 decks
-10%synergy
Otherworldly Gaze
14%inclusion8 decks57 decks
12%synergy
Thirst for Meaning
12%inclusion7 decks57 decks
11%synergy
Strix Serenade
12%inclusion7 decks57 decks
9%synergy
Fell the Profane
11%inclusion6 decks57 decks
1%synergy
Cabal Ritual
11%inclusion6 decks57 decks
7%synergy
Sink into Stupor
11%inclusion6 decks57 decks
-3%synergy
Generous Gift
11%inclusion6 decks57 decks
-3%synergy
Brainstorm
8.8%inclusion5 decks57 decks
-8%synergy
Inkshield
8.8%inclusion5 decks57 decks
-1%synergy
Flusterstorm
7.0%inclusion4 decks57 decks
-1%synergy
Disallow
7.0%inclusion4 decks57 decks
3%synergy
Utter End
7.0%inclusion4 decks57 decks
1%synergy
Fierce Guardianship
7.0%inclusion4 decks57 decks
-13%synergy
Mental Misstep
5.3%inclusion3 decks57 decks
-1%synergy
Dawn's Truce
5.3%inclusion3 decks57 decks
1%synergy
Intuition
5.3%inclusion3 decks57 decks
4%synergy
Flawless Maneuver
5.3%inclusion3 decks57 decks
-4%synergy
Gifts Ungiven
5.3%inclusion3 decks57 decks
3%synergy
Angel's Grace
5.3%inclusion3 decks57 decks
3%synergy
Mana Drain
5.3%inclusion3 decks57 decks
-12%synergy
Slip Out the Back
5.3%inclusion3 decks57 decks
4%synergy
Silence
5.3%inclusion3 decks57 decks
-5%synergy
Into the Flood Maw
5.3%inclusion3 decks57 decks
2%synergy
Mystical Tutor
5.3%inclusion3 decks57 decks
-5%synergy
Withering Torment
5.3%inclusion3 decks57 decks
4%synergy
Sorceries
Sevinne's Reclamation
42%inclusion24 decks57 decks
33%synergy
Redress Fate
37%inclusion21 decks57 decks
32%synergy
Windfall
33%inclusion19 decks57 decks
20%synergy
Reanimate
30%inclusion17 decks57 decks
14%synergy
Dance of the Manse
26%inclusion15 decks57 decks
23%synergy
Glimpse the Unthinkable
25%inclusion14 decks57 decks
24%synergy
Singularity Rupture
22%inclusion9 decks41 decks
20%synergy
Extinguish All Hope
19%inclusion11 decks57 decks
18%synergy
Space-Time Anomaly
17%inclusion7 decks41 decks
16%synergy
Wrath of God
12%inclusion7 decks57 decks
9%synergy
Toxic Deluge
12%inclusion7 decks57 decks
-7%synergy
Resurgent Belief
11%inclusion6 decks57 decks
9%synergy
Idyllic Tutor
11%inclusion6 decks57 decks
6%synergy
Buried Alive
11%inclusion6 decks57 decks
6%synergy
Supreme Verdict
8.8%inclusion5 decks57 decks
-6%synergy
Unmarked Grave
8.8%inclusion5 decks57 decks
7%synergy
Traumatize
8.8%inclusion5 decks57 decks
8%synergy
Austere Command
7.0%inclusion4 decks57 decks
-1%synergy
Open the Vaults
7.0%inclusion4 decks57 decks
6%synergy
Time Wipe
7.0%inclusion4 decks57 decks
1%synergy
Replenish
7.0%inclusion4 decks57 decks
5%synergy
Night's Whisper
7.0%inclusion4 decks57 decks
4%synergy
Damn
7.0%inclusion4 decks57 decks
-13%synergy
Ponder
5.3%inclusion3 decks57 decks
-4%synergy
Lively Dirge
5.3%inclusion3 decks57 decks
4%synergy
Terminus
5.3%inclusion3 decks57 decks
1%synergy
Cut Your Losses
5.3%inclusion3 decks57 decks
5%synergy
Demonic Counsel
5.3%inclusion3 decks57 decks
4%synergy
Rise of the Dark Realms
5.3%inclusion3 decks57 decks
2%synergy
Breach the Multiverse
5.3%inclusion3 decks57 decks
3%synergy
Utility Artifacts
Mesmeric Orb
32%inclusion18 decks57 decks
30%synergy
Cloud Key
18%inclusion10 decks57 decks
14%synergy
Lightning Greaves
14%inclusion8 decks57 decks
-9%synergy
Swiftfoot Boots
12%inclusion7 decks57 decks
-12%synergy
Pearl Medallion
7.0%inclusion4 decks57 decks
6%synergy
Wayfarer's Bauble
5.3%inclusion3 decks57 decks
-2%synergy
Crucible of Worlds
5.3%inclusion3 decks57 decks
4%synergy
Whip of Erebos
5.3%inclusion3 decks57 decks
3%synergy
Jet Medallion
5.3%inclusion3 decks57 decks
4%synergy
Enchantments
Propaganda
49%inclusion28 decks57 decks
20%synergy
Secret Arcade // Dusty Parlor
47%inclusion27 decks57 decks
43%synergy
Grasp of Fate
46%inclusion26 decks57 decks
40%synergy
Estrid's Invocation
44%inclusion25 decks57 decks
39%synergy
Seal of Cleansing
44%inclusion25 decks57 decks
42%synergy
Ghostly Prison
40%inclusion23 decks57 decks
17%synergy
Blind Obedience
39%inclusion22 decks57 decks
27%synergy
Sigil of the Empty Throne
37%inclusion21 decks57 decks
31%synergy
Cacophony Unleashed
33%inclusion19 decks57 decks
32%synergy
Starfield of Nyx
32%inclusion18 decks57 decks
28%synergy
Stillness in Motion
31%inclusion16 decks51 decks
31%synergy
Dance of the Dead
30%inclusion17 decks57 decks
28%synergy
Out of the Tombs
30%inclusion17 decks57 decks
29%synergy
Polluted Cistern // Dim Oubliette
28%inclusion16 decks57 decks
28%synergy
Monologue Tax
26%inclusion15 decks57 decks
20%synergy
Greater Auramancy
26%inclusion15 decks57 decks
22%synergy
The Meathook Massacre
25%inclusion14 decks57 decks
21%synergy
Court of Cunning
25%inclusion14 decks57 decks
24%synergy
Copy Enchantment
25%inclusion14 decks57 decks
20%synergy
Timely Ward
25%inclusion14 decks57 decks
20%synergy
Secrets of the Dead
25%inclusion14 decks57 decks
24%synergy
Defiled Crypt // Cadaver Lab
25%inclusion14 decks57 decks
24%synergy
Darksteel Mutation
23%inclusion13 decks57 decks
17%synergy
Touch the Spirit Realm
23%inclusion13 decks57 decks
21%synergy
Authority of the Consuls
23%inclusion13 decks57 decks
9%synergy
Hallowed Haunting
23%inclusion13 decks57 decks
20%synergy
Extravagant Replication
21%inclusion12 decks57 decks
16%synergy
The Tale of Tamiyo
21%inclusion12 decks57 decks
21%synergy
Leyline of Anticipation
21%inclusion12 decks57 decks
17%synergy
Ethereal Armor
21%inclusion12 decks57 decks
17%synergy
Changing Loyalty
20%inclusion3 decks15 decks
19%synergy
All That Glitters
19%inclusion11 decks57 decks
11%synergy
Seal of Removal
19%inclusion11 decks57 decks
19%synergy
Shark Typhoon
18%inclusion10 decks57 decks
12%synergy
Phyrexian Arena
18%inclusion10 decks57 decks
4%synergy
Teval's Judgment
17%inclusion9 decks52 decks
17%synergy
Static Prison
16%inclusion9 decks57 decks
15%synergy
Sheltered by Ghosts
16%inclusion9 decks57 decks
13%synergy
Imprisoned in the Moon
14%inclusion8 decks57 decks
7%synergy
Restricted Office // Lecture Hall
14%inclusion8 decks57 decks
12%synergy
Solitary Confinement
14%inclusion8 decks57 decks
12%synergy
One with the Multiverse
12%inclusion7 decks57 decks
8%synergy
Aura of Silence
12%inclusion7 decks57 decks
9%synergy
Omniscience
11%inclusion6 decks57 decks
7%synergy
Dazzling Theater // Prop Room
11%inclusion6 decks57 decks
9%synergy
Oubliette
11%inclusion6 decks57 decks
9%synergy
Black Market Connections
11%inclusion6 decks57 decks
-4%synergy
Nowhere to Run
11%inclusion6 decks57 decks
9%synergy
Trouble in Pairs
11%inclusion6 decks57 decks
5%synergy
Virtue of Persistence
11%inclusion6 decks57 decks
9%synergy
Battles
Invasion of Theros
5.3%inclusion3 decks57 decks
4%synergy
Planeswalkers
Jace, the Perfected Mind
7.0%inclusion4 decks57 decks
7%synergy
Jace, Wielder of Mysteries
5.3%inclusion3 decks57 decks
4%synergy
Ashiok, Dream Render
5.3%inclusion3 decks57 decks
4%synergy
Utility Lands
Hall of Heliod's Generosity
61%inclusion35 decks57 decks
49%synergy
Bojuka Bog
44%inclusion25 decks57 decks
17%synergy
Cephalid Coliseum
21%inclusion12 decks57 decks
17%synergy
Reliquary Tower
19%inclusion11 decks57 decks
-15%synergy
Otawara, Soaring City
19%inclusion11 decks57 decks
0%synergy
Takenuma, Abandoned Mire
14%inclusion8 decks57 decks
8%synergy
Halimar Depths
12%inclusion7 decks57 decks
8%synergy
Mystic Sanctuary
11%inclusion6 decks57 decks
7%synergy
Nephalia Drownyard
11%inclusion6 decks57 decks
10%synergy
Adagia, Windswept Bastion
7.3%inclusion3 decks41 decks
5%synergy
Eiganjo, Seat of the Empire
7.0%inclusion4 decks57 decks
2%synergy
Minamo, School at Water's Edge
5.3%inclusion3 decks57 decks
1%synergy
Geier Reach Sanitarium
5.3%inclusion3 decks57 decks
1%synergy
Command Beacon
5.3%inclusion3 decks57 decks
3%synergy
Academy Ruins
5.3%inclusion3 decks57 decks
-1%synergy
Urborg, Tomb of Yawgmoth
5.3%inclusion3 decks57 decks
-8%synergy
Vault of the Archangel
5.3%inclusion3 decks57 decks
-1%synergy
Mana Artifacts
Sol Ring
88%inclusion50 decks57 decks
-2%synergy
Arcane Signet
86%inclusion49 decks57 decks
-2%synergy
Talisman of Dominance
61%inclusion35 decks57 decks
11%synergy
Talisman of Progress
56%inclusion32 decks57 decks
12%synergy
Talisman of Hierarchy
54%inclusion31 decks57 decks
10%synergy
Fellwar Stone
35%inclusion20 decks57 decks
2%synergy
Azorius Signet
32%inclusion18 decks57 decks
2%synergy
Orzhov Signet
28%inclusion16 decks57 decks
-3%synergy
Dimir Signet
23%inclusion13 decks57 decks
-7%synergy
Commander's Sphere
11%inclusion6 decks57 decks
-7%synergy
Mind Stone
11%inclusion6 decks57 decks
-1%synergy
Chromatic Lantern
7.0%inclusion4 decks57 decks
-6%synergy
Thought Vessel
5.3%inclusion3 decks57 decks
-20%synergy
Lands
Command Tower
100%inclusion57 decks57 decks
7%synergy
Swamp
95%inclusion54 decks57 decks
3%synergy
Island
95%inclusion54 decks57 decks
2%synergy
Plains
91%inclusion52 decks57 decks
-1%synergy
Exotic Orchard
70%inclusion40 decks57 decks
11%synergy
Caves of Koilos
63%inclusion36 decks57 decks
27%synergy
Adarkar Wastes
63%inclusion36 decks57 decks
31%synergy
Arcane Sanctum
60%inclusion34 decks57 decks
6%synergy
Underground River
56%inclusion32 decks57 decks
21%synergy
Godless Shrine
51%inclusion29 decks57 decks
-1%synergy
Watery Grave
51%inclusion29 decks57 decks
-0%synergy
Hallowed Fountain
49%inclusion28 decks57 decks
-2%synergy
Isolated Chapel
47%inclusion27 decks57 decks
5%synergy
Flooded Strand
47%inclusion27 decks57 decks
9%synergy
Polluted Delta
46%inclusion26 decks57 decks
8%synergy
Glacial Fortress
42%inclusion24 decks57 decks
-1%synergy
Marsh Flats
40%inclusion23 decks57 decks
4%synergy
Undercity Sewers
37%inclusion21 decks57 decks
22%synergy
Shadowy Backstreet
37%inclusion21 decks57 decks
24%synergy
Raffine's Tower
37%inclusion21 decks57 decks
-4%synergy
Drowned Catacomb
37%inclusion21 decks57 decks
-2%synergy
Meticulous Archive
37%inclusion21 decks57 decks
23%synergy
Vault of Champions
35%inclusion20 decks57 decks
3%synergy
Prairie Stream
33%inclusion19 decks57 decks
-7%synergy
Valgavoth's Lair
33%inclusion19 decks57 decks
31%synergy
Sea of Clouds
33%inclusion19 decks57 decks
-1%synergy
Morphic Pool
32%inclusion18 decks57 decks
-2%synergy
Sunken Hollow
32%inclusion18 decks57 decks
-8%synergy
Evolving Wilds
30%inclusion17 decks57 decks
5%synergy
Temple of Enlightenment
28%inclusion16 decks57 decks
13%synergy
Temple of Silence
28%inclusion16 decks57 decks
10%synergy
Floodfarm Verge
28%inclusion16 decks57 decks
17%synergy
Terramorphic Expanse
26%inclusion15 decks57 decks
11%synergy
Temple of Deceit
26%inclusion15 decks57 decks
9%synergy
Gloomlake Verge
25%inclusion14 decks57 decks
14%synergy
Deserted Beach
23%inclusion13 decks57 decks
2%synergy
Azorius Chancery
21%inclusion12 decks57 decks
8%synergy
Dimir Aqueduct
21%inclusion12 decks57 decks
8%synergy
Shipwreck Marsh
21%inclusion12 decks57 decks
1%synergy
Contaminated Landscape
19%inclusion11 decks57 decks
6%synergy
Obscura Storefront
19%inclusion11 decks57 decks
10%synergy
Tundra
18%inclusion10 decks57 decks
2%synergy
Ash Barrens
18%inclusion10 decks57 decks
7%synergy
City of Brass
18%inclusion10 decks57 decks
2%synergy
Underground Sea
16%inclusion9 decks57 decks
0%synergy
Orzhov Basilica
16%inclusion9 decks57 decks
1%synergy
Scrubland
16%inclusion9 decks57 decks
-0%synergy
Mana Confluence
16%inclusion9 decks57 decks
2%synergy
Witch Enchanter
14%inclusion8 decks57 decks
7%synergy
Misty Rainforest
14%inclusion8 decks57 decks
3%synergy
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