The Master of Keys (Commander) - Upgraded Mill

The Master of Keys
Rank #301
58decks
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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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Archnemesis
11%inclusion1 decks9 decks
11%synergy
Hidden Lair
10%inclusion1 decks10 decks
8%synergy
High Synergy Cards
Inquisitive Glimmer
88%inclusion51 decks58 decks
81%synergy
Gravebreaker Lamia
72%inclusion42 decks58 decks
71%synergy
Ripples of Undeath
72%inclusion42 decks58 decks
70%synergy
Entity Tracker
74%inclusion43 decks58 decks
68%synergy
Starfield Mystic
72%inclusion42 decks58 decks
66%synergy
Mesa Enchantress
71%inclusion41 decks58 decks
62%synergy
Scrabbling Skullcrab
60%inclusion35 decks58 decks
59%synergy
Animate Dead
69%inclusion40 decks58 decks
59%synergy
Demon of Fate's Design
62%inclusion36 decks58 decks
57%synergy
Fear of Sleep Paralysis
59%inclusion34 decks58 decks
54%synergy
Top Cards
Doomwake Giant
59%inclusion34 decks58 decks
53%synergy
Mirrormade
57%inclusion33 decks58 decks
47%synergy
Dress Down
55%inclusion32 decks58 decks
53%synergy
Swords to Plowshares
53%inclusion31 decks58 decks
-14%synergy
Necromancy
52%inclusion30 decks58 decks
47%synergy
Sphere of Safety
52%inclusion30 decks58 decks
42%synergy
Cemetery Tampering
52%inclusion30 decks58 decks
51%synergy
Overlord of the Floodpits
50%inclusion29 decks58 decks
47%synergy
Mystic Remora
50%inclusion29 decks58 decks
30%synergy
Amphibian Downpour
50%inclusion29 decks58 decks
45%synergy
Game Changers
Smothering Tithe
31%inclusion18 decks58 decks
1%synergy
Rhystic Study
16%inclusion9 decks58 decks
-15%synergy
Enlightened Tutor
14%inclusion8 decks58 decks
-5%synergy
Demonic Tutor
10%inclusion6 decks58 decks
-10%synergy
Consecrated Sphinx
8.6%inclusion5 decks58 decks
3%synergy
Serra's Sanctum
8.6%inclusion5 decks58 decks
7%synergy
Farewell
8.6%inclusion5 decks58 decks
-3%synergy
Teferi's Protection
6.9%inclusion4 decks58 decks
-9%synergy
Ancient Tomb
5.2%inclusion3 decks58 decks
-7%synergy
Necropotence
5.2%inclusion3 decks58 decks
-1%synergy
Creatures
Ondu Spiritdancer
50%inclusion29 decks58 decks
44%synergy
Victor, Valgavoth's Seneschal
47%inclusion27 decks58 decks
45%synergy
Overlord of the Balemurk
45%inclusion26 decks58 decks
43%synergy
Zur, Eternal Schemer
43%inclusion25 decks58 decks
40%synergy
Fear of Impostors
38%inclusion22 decks58 decks
37%synergy
Silent Hallcreeper
34%inclusion20 decks58 decks
30%synergy
Heliod, the Radiant Dawn
34%inclusion20 decks58 decks
31%synergy
Ghostly Dancers
29%inclusion17 decks58 decks
27%synergy
Enduring Curiosity
28%inclusion16 decks58 decks
20%synergy
Grim Guardian
26%inclusion15 decks58 decks
23%synergy
Sage of Mysteries
22%inclusion13 decks58 decks
22%synergy
Mindwrack Harpy
22%inclusion13 decks58 decks
22%synergy
Lotho, Corrupt Shirriff
21%inclusion12 decks58 decks
4%synergy
Abdel Adrian, Gorion's Ward
21%inclusion12 decks58 decks
19%synergy
Zur the Enchanter
21%inclusion12 decks58 decks
16%synergy
Moon-Blessed Cleric
19%inclusion11 decks58 decks
14%synergy
Athreos, Shroud-Veiled
19%inclusion11 decks58 decks
15%synergy
Archon of Sun's Grace
17%inclusion10 decks58 decks
13%synergy
Archetype of Imagination
17%inclusion10 decks58 decks
13%synergy
Balemurk Leech
17%inclusion10 decks58 decks
17%synergy
Soaring Lightbringer
16%inclusion9 decks58 decks
11%synergy
Overlord of the Mistmoors
16%inclusion9 decks58 decks
14%synergy
Ancient Cellarspawn
16%inclusion9 decks58 decks
13%synergy
Alseid of Life's Bounty
16%inclusion9 decks58 decks
14%synergy
Aminatou, Veil Piercer
16%inclusion9 decks58 decks
14%synergy
Witch Enchanter
14%inclusion8 decks58 decks
7%synergy
Hedron Crab
14%inclusion8 decks58 decks
13%synergy
Hullbreaker Horror
14%inclusion8 decks58 decks
8%synergy
Skullsnap Nuisance
14%inclusion8 decks58 decks
13%synergy
Grand Abolisher
14%inclusion8 decks58 decks
-1%synergy
Eiganjo Dynastorian
13%inclusion2 decks16 decks
11%synergy
Starnheim Courser
12%inclusion7 decks58 decks
9%synergy
Laboratory Maniac
12%inclusion7 decks58 decks
9%synergy
Ledger Shredder
12%inclusion7 decks58 decks
3%synergy
Emet-Selch of the Third Seat
11%inclusion5 decks44 decks
2%synergy
Doom Whisperer
10%inclusion6 decks58 decks
9%synergy
Esper Sentinel
10%inclusion6 decks58 decks
-17%synergy
Neerdiv, Devious Diver
10%inclusion6 decks58 decks
10%synergy
Nightmare Shepherd
10%inclusion6 decks58 decks
8%synergy
Athreos, God of Passage
10%inclusion6 decks58 decks
9%synergy
Fear of Infinity
8.6%inclusion5 decks58 decks
8%synergy
Stenn, Paranoid Partisan
8.6%inclusion5 decks58 decks
7%synergy
Auramancer
8.6%inclusion5 decks58 decks
6%synergy
Angel of Suffering
8.6%inclusion5 decks58 decks
8%synergy
Spirited Companion
8.6%inclusion5 decks58 decks
7%synergy
Twilight Diviner
7.7%inclusion2 decks26 decks
6%synergy
Syr Konrad, the Grim
6.9%inclusion4 decks58 decks
1%synergy
Valley Floodcaller
6.9%inclusion4 decks58 decks
3%synergy
Phenax, God of Deception
5.2%inclusion3 decks58 decks
5%synergy
The Mindskinner
5.2%inclusion3 decks58 decks
4%synergy
Instants
Counterspell
48%inclusion28 decks58 decks
6%synergy
An Offer You Can't Refuse
45%inclusion26 decks58 decks
17%synergy
Arcane Denial
43%inclusion25 decks58 decks
23%synergy
Entomb
36%inclusion21 decks58 decks
30%synergy
Dark Ritual
36%inclusion21 decks58 decks
16%synergy
Path to Exile
36%inclusion21 decks58 decks
-6%synergy
Frantic Search
21%inclusion12 decks58 decks
2%synergy
Negate
21%inclusion12 decks58 decks
5%synergy
Void Rend
21%inclusion12 decks58 decks
-14%synergy
Dovin's Veto
19%inclusion11 decks58 decks
-7%synergy
Swan Song
19%inclusion11 decks58 decks
-1%synergy
Anguished Unmaking
16%inclusion9 decks58 decks
-10%synergy
Thirst for Meaning
14%inclusion8 decks58 decks
12%synergy
Otherworldly Gaze
14%inclusion8 decks58 decks
12%synergy
Strix Serenade
12%inclusion7 decks58 decks
9%synergy
Fell the Profane
10%inclusion6 decks58 decks
1%synergy
Generous Gift
10%inclusion6 decks58 decks
-3%synergy
Inkshield
10%inclusion6 decks58 decks
0%synergy
Brainstorm
8.6%inclusion5 decks58 decks
-8%synergy
Cabal Ritual
8.6%inclusion5 decks58 decks
5%synergy
Sink into Stupor
8.6%inclusion5 decks58 decks
-5%synergy
Disallow
6.9%inclusion4 decks58 decks
3%synergy
Utter End
6.9%inclusion4 decks58 decks
1%synergy
Dawn's Truce
5.2%inclusion3 decks58 decks
1%synergy
Flawless Maneuver
5.2%inclusion3 decks58 decks
-4%synergy
Slip Out the Back
5.2%inclusion3 decks58 decks
4%synergy
Gifts Ungiven
5.2%inclusion3 decks58 decks
2%synergy
Flusterstorm
5.2%inclusion3 decks58 decks
-3%synergy
Withering Torment
5.2%inclusion3 decks58 decks
4%synergy
Sorceries
Sevinne's Reclamation
43%inclusion25 decks58 decks
34%synergy
Redress Fate
40%inclusion23 decks58 decks
34%synergy
Windfall
36%inclusion21 decks58 decks
23%synergy
Reanimate
28%inclusion16 decks58 decks
11%synergy
Dance of the Manse
26%inclusion15 decks58 decks
23%synergy
Glimpse the Unthinkable
24%inclusion14 decks58 decks
24%synergy
Singularity Rupture
21%inclusion9 decks42 decks
19%synergy
Extinguish All Hope
21%inclusion12 decks58 decks
19%synergy
Space-Time Anomaly
17%inclusion7 decks42 decks
15%synergy
Wrath of God
12%inclusion7 decks58 decks
9%synergy
Idyllic Tutor
12%inclusion7 decks58 decks
8%synergy
Toxic Deluge
12%inclusion7 decks58 decks
-8%synergy
Buried Alive
10%inclusion6 decks58 decks
6%synergy
Traumatize
10%inclusion6 decks58 decks
10%synergy
Supreme Verdict
8.6%inclusion5 decks58 decks
-6%synergy
Resurgent Belief
8.6%inclusion5 decks58 decks
7%synergy
Unmarked Grave
8.6%inclusion5 decks58 decks
7%synergy
Replenish
8.6%inclusion5 decks58 decks
7%synergy
Time Wipe
8.6%inclusion5 decks58 decks
2%synergy
Night's Whisper
8.6%inclusion5 decks58 decks
6%synergy
Austere Command
6.9%inclusion4 decks58 decks
-1%synergy
Open the Vaults
6.9%inclusion4 decks58 decks
6%synergy
Cut Your Losses
6.9%inclusion4 decks58 decks
7%synergy
Damn
6.9%inclusion4 decks58 decks
-13%synergy
Ponder
5.2%inclusion3 decks58 decks
-4%synergy
Lively Dirge
5.2%inclusion3 decks58 decks
4%synergy
Demonic Counsel
5.2%inclusion3 decks58 decks
4%synergy
Terminus
5.2%inclusion3 decks58 decks
1%synergy
Rise of the Dark Realms
5.2%inclusion3 decks58 decks
2%synergy
Breach the Multiverse
5.2%inclusion3 decks58 decks
3%synergy
Utility Artifacts
Mesmeric Orb
33%inclusion19 decks58 decks
32%synergy
Cloud Key
17%inclusion10 decks58 decks
14%synergy
Lightning Greaves
14%inclusion8 decks58 decks
-9%synergy
Swiftfoot Boots
14%inclusion8 decks58 decks
-10%synergy
Pearl Medallion
6.9%inclusion4 decks58 decks
6%synergy
Wayfarer's Bauble
6.9%inclusion4 decks58 decks
-0%synergy
Crucible of Worlds
5.2%inclusion3 decks58 decks
4%synergy
Whip of Erebos
5.2%inclusion3 decks58 decks
3%synergy
Jet Medallion
5.2%inclusion3 decks58 decks
4%synergy
Enchantments
Propaganda
50%inclusion29 decks58 decks
21%synergy
Grasp of Fate
47%inclusion27 decks58 decks
40%synergy
Seal of Cleansing
47%inclusion27 decks58 decks
45%synergy
Secret Arcade // Dusty Parlor
47%inclusion27 decks58 decks
42%synergy
Estrid's Invocation
43%inclusion25 decks58 decks
38%synergy
Ghostly Prison
41%inclusion24 decks58 decks
18%synergy
Sigil of the Empty Throne
40%inclusion23 decks58 decks
34%synergy
Blind Obedience
40%inclusion23 decks58 decks
28%synergy
Cacophony Unleashed
34%inclusion20 decks58 decks
33%synergy
Starfield of Nyx
33%inclusion19 decks58 decks
29%synergy
Out of the Tombs
31%inclusion18 decks58 decks
31%synergy
Stillness in Motion
31%inclusion16 decks52 decks
30%synergy
Dance of the Dead
29%inclusion17 decks58 decks
27%synergy
Polluted Cistern // Dim Oubliette
28%inclusion16 decks58 decks
27%synergy
The Meathook Massacre
26%inclusion15 decks58 decks
23%synergy
Greater Auramancy
26%inclusion15 decks58 decks
22%synergy
Monologue Tax
26%inclusion15 decks58 decks
19%synergy
Darksteel Mutation
24%inclusion14 decks58 decks
18%synergy
Court of Cunning
24%inclusion14 decks58 decks
23%synergy
Timely Ward
24%inclusion14 decks58 decks
19%synergy
Secrets of the Dead
24%inclusion14 decks58 decks
24%synergy
Defiled Crypt // Cadaver Lab
24%inclusion14 decks58 decks
23%synergy
Touch the Spirit Realm
22%inclusion13 decks58 decks
20%synergy
Authority of the Consuls
22%inclusion13 decks58 decks
9%synergy
Copy Enchantment
22%inclusion13 decks58 decks
18%synergy
The Tale of Tamiyo
22%inclusion13 decks58 decks
22%synergy
Leyline of Anticipation
22%inclusion13 decks58 decks
18%synergy
Hallowed Haunting
22%inclusion13 decks58 decks
20%synergy
Extravagant Replication
21%inclusion12 decks58 decks
16%synergy
All That Glitters
21%inclusion12 decks58 decks
13%synergy
Sheltered by Ghosts
21%inclusion12 decks58 decks
18%synergy
Ethereal Armor
21%inclusion12 decks58 decks
16%synergy
Phyrexian Arena
19%inclusion11 decks58 decks
5%synergy
Seal of Removal
19%inclusion11 decks58 decks
18%synergy
Teval's Judgment
19%inclusion10 decks53 decks
18%synergy
Changing Loyalty
19%inclusion3 decks16 decks
18%synergy
Shark Typhoon
17%inclusion10 decks58 decks
11%synergy
Imprisoned in the Moon
16%inclusion9 decks58 decks
9%synergy
Restricted Office // Lecture Hall
14%inclusion8 decks58 decks
12%synergy
Solitary Confinement
14%inclusion8 decks58 decks
12%synergy
Static Prison
14%inclusion8 decks58 decks
13%synergy
One with the Multiverse
12%inclusion7 decks58 decks
7%synergy
Virtue of Persistence
12%inclusion7 decks58 decks
10%synergy
Black Market Connections
12%inclusion7 decks58 decks
-3%synergy
Aura of Silence
12%inclusion7 decks58 decks
9%synergy
Unable to Scream
10%inclusion6 decks58 decks
9%synergy
The Eldest Reborn
10%inclusion6 decks58 decks
8%synergy
Dazzling Theater // Prop Room
10%inclusion6 decks58 decks
9%synergy
Oubliette
10%inclusion6 decks58 decks
9%synergy
Nowhere to Run
10%inclusion6 decks58 decks
9%synergy
Battles
Invasion of Theros
5.2%inclusion3 decks58 decks
4%synergy
Planeswalkers
Jace, Wielder of Mysteries
6.9%inclusion4 decks58 decks
5%synergy
Jace, the Perfected Mind
5.2%inclusion3 decks58 decks
5%synergy
Ashiok, Dream Render
5.2%inclusion3 decks58 decks
4%synergy
Utility Lands
Hall of Heliod's Generosity
64%inclusion37 decks58 decks
51%synergy
Bojuka Bog
47%inclusion27 decks58 decks
20%synergy
Cephalid Coliseum
21%inclusion12 decks58 decks
17%synergy
Reliquary Tower
19%inclusion11 decks58 decks
-15%synergy
Otawara, Soaring City
17%inclusion10 decks58 decks
-2%synergy
Takenuma, Abandoned Mire
14%inclusion8 decks58 decks
7%synergy
Halimar Depths
12%inclusion7 decks58 decks
7%synergy
Mystic Sanctuary
10%inclusion6 decks58 decks
7%synergy
Nephalia Drownyard
10%inclusion6 decks58 decks
10%synergy
Adagia, Windswept Bastion
7.1%inclusion3 decks42 decks
5%synergy
Eiganjo, Seat of the Empire
6.9%inclusion4 decks58 decks
2%synergy
Minamo, School at Water's Edge
5.2%inclusion3 decks58 decks
1%synergy
Geier Reach Sanitarium
5.2%inclusion3 decks58 decks
1%synergy
Academy Ruins
5.2%inclusion3 decks58 decks
-1%synergy
Command Beacon
5.2%inclusion3 decks58 decks
2%synergy
Vault of the Archangel
5.2%inclusion3 decks58 decks
-1%synergy
Urborg, Tomb of Yawgmoth
5.2%inclusion3 decks58 decks
-8%synergy
Mana Artifacts
Sol Ring
88%inclusion51 decks58 decks
-2%synergy
Arcane Signet
86%inclusion50 decks58 decks
-1%synergy
Talisman of Dominance
60%inclusion35 decks58 decks
10%synergy
Talisman of Progress
57%inclusion33 decks58 decks
12%synergy
Talisman of Hierarchy
55%inclusion32 decks58 decks
10%synergy
Fellwar Stone
33%inclusion19 decks58 decks
-0%synergy
Azorius Signet
31%inclusion18 decks58 decks
2%synergy
Orzhov Signet
28%inclusion16 decks58 decks
-4%synergy
Dimir Signet
22%inclusion13 decks58 decks
-7%synergy
Commander's Sphere
12%inclusion7 decks58 decks
-5%synergy
Mind Stone
10%inclusion6 decks58 decks
-1%synergy
Chromatic Lantern
6.9%inclusion4 decks58 decks
-6%synergy
Thought Vessel
5.2%inclusion3 decks58 decks
-20%synergy
Lands
Command Tower
100%inclusion58 decks58 decks
7%synergy
Swamp
95%inclusion55 decks58 decks
3%synergy
Island
95%inclusion55 decks58 decks
2%synergy
Plains
93%inclusion54 decks58 decks
1%synergy
Exotic Orchard
71%inclusion41 decks58 decks
12%synergy
Caves of Koilos
64%inclusion37 decks58 decks
28%synergy
Adarkar Wastes
64%inclusion37 decks58 decks
31%synergy
Arcane Sanctum
62%inclusion36 decks58 decks
8%synergy
Underground River
59%inclusion34 decks58 decks
23%synergy
Godless Shrine
48%inclusion28 decks58 decks
-4%synergy
Isolated Chapel
48%inclusion28 decks58 decks
6%synergy
Watery Grave
48%inclusion28 decks58 decks
-3%synergy
Hallowed Fountain
47%inclusion27 decks58 decks
-5%synergy
Flooded Strand
45%inclusion26 decks58 decks
6%synergy
Glacial Fortress
43%inclusion25 decks58 decks
-1%synergy
Polluted Delta
43%inclusion25 decks58 decks
5%synergy
Drowned Catacomb
38%inclusion22 decks58 decks
-1%synergy
Marsh Flats
38%inclusion22 decks58 decks
2%synergy
Shadowy Backstreet
36%inclusion21 decks58 decks
24%synergy
Valgavoth's Lair
36%inclusion21 decks58 decks
34%synergy
Raffine's Tower
36%inclusion21 decks58 decks
-4%synergy
Meticulous Archive
36%inclusion21 decks58 decks
22%synergy
Undercity Sewers
34%inclusion20 decks58 decks
20%synergy
Vault of Champions
34%inclusion20 decks58 decks
2%synergy
Sea of Clouds
33%inclusion19 decks58 decks
-2%synergy
Prairie Stream
33%inclusion19 decks58 decks
-8%synergy
Evolving Wilds
31%inclusion18 decks58 decks
7%synergy
Sunken Hollow
31%inclusion18 decks58 decks
-9%synergy
Terramorphic Expanse
29%inclusion17 decks58 decks
14%synergy
Temple of Enlightenment
29%inclusion17 decks58 decks
14%synergy
Morphic Pool
29%inclusion17 decks58 decks
-4%synergy
Temple of Silence
29%inclusion17 decks58 decks
11%synergy
Temple of Deceit
28%inclusion16 decks58 decks
11%synergy
Floodfarm Verge
28%inclusion16 decks58 decks
17%synergy
Gloomlake Verge
24%inclusion14 decks58 decks
13%synergy
Azorius Chancery
22%inclusion13 decks58 decks
9%synergy
Dimir Aqueduct
22%inclusion13 decks58 decks
10%synergy
Deserted Beach
22%inclusion13 decks58 decks
2%synergy
Contaminated Landscape
21%inclusion12 decks58 decks
7%synergy
Shipwreck Marsh
21%inclusion12 decks58 decks
0%synergy
Obscura Storefront
21%inclusion12 decks58 decks
12%synergy
Ash Barrens
19%inclusion11 decks58 decks
8%synergy
Orzhov Basilica
17%inclusion10 decks58 decks
3%synergy
Path of Ancestry
17%inclusion10 decks58 decks
-11%synergy
Tundra
16%inclusion9 decks58 decks
-0%synergy
City of Brass
16%inclusion9 decks58 decks
0%synergy
Witch Enchanter
14%inclusion8 decks58 decks
7%synergy
Tainted Isle
14%inclusion8 decks58 decks
8%synergy
Myriad Landscape
14%inclusion8 decks58 decks
6%synergy
Underground Sea
14%inclusion8 decks58 decks
-2%synergy
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