The Master of Keys (Commander) - Upgraded Control

The Master of Keys
Rank #312
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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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North Pole Gates
5.6%inclusion1 decks18 decks
5%synergy
Bender's Waterskin
4.3%inclusion1 decks23 decks
1%synergy
High Synergy Cards
Ripples of Undeath
80%inclusion28 decks35 decks
77%synergy
Entity Tracker
77%inclusion27 decks35 decks
71%synergy
Inquisitive Glimmer
77%inclusion27 decks35 decks
70%synergy
Dress Down
66%inclusion23 decks35 decks
63%synergy
Starfield Mystic
69%inclusion24 decks35 decks
62%synergy
Gravebreaker Lamia
63%inclusion22 decks35 decks
62%synergy
Animate Dead
71%inclusion25 decks35 decks
62%synergy
Demon of Fate's Design
63%inclusion22 decks35 decks
57%synergy
Scrabbling Skullcrab
57%inclusion20 decks35 decks
56%synergy
Hall of Heliod's Generosity
69%inclusion24 decks35 decks
55%synergy
Top Cards
Mystic Remora
66%inclusion23 decks35 decks
44%synergy
Necromancy
60%inclusion21 decks35 decks
55%synergy
Mesa Enchantress
60%inclusion21 decks35 decks
51%synergy
Amphibian Downpour
57%inclusion20 decks35 decks
53%synergy
Fear of Impostors
54%inclusion19 decks35 decks
53%synergy
Doomwake Giant
54%inclusion19 decks35 decks
48%synergy
Overlord of the Floodpits
51%inclusion18 decks35 decks
48%synergy
Fear of Sleep Paralysis
51%inclusion18 decks35 decks
46%synergy
Swords to Plowshares
51%inclusion18 decks35 decks
-17%synergy
Grasp of Fate
49%inclusion17 decks35 decks
42%synergy
Game Changers
Smothering Tithe
37%inclusion13 decks35 decks
5%synergy
Rhystic Study
29%inclusion10 decks35 decks
-4%synergy
Gifts Ungiven
14%inclusion5 decks35 decks
12%synergy
Enlightened Tutor
11%inclusion4 decks35 decks
-9%synergy
Teferi's Protection
8.6%inclusion3 decks35 decks
-8%synergy
Consecrated Sphinx
8.6%inclusion3 decks35 decks
2%synergy
Serra's Sanctum
5.7%inclusion2 decks35 decks
4%synergy
Intuition
5.7%inclusion2 decks35 decks
4%synergy
Cyclonic Rift
5.7%inclusion2 decks35 decks
-19%synergy
Creatures
Overlord of the Balemurk
49%inclusion17 decks35 decks
47%synergy
Zur, Eternal Schemer
49%inclusion17 decks35 decks
45%synergy
Ondu Spiritdancer
40%inclusion14 decks35 decks
34%synergy
Victor, Valgavoth's Seneschal
37%inclusion13 decks35 decks
35%synergy
Heliod, the Radiant Dawn
37%inclusion13 decks35 decks
33%synergy
Silent Hallcreeper
31%inclusion11 decks35 decks
27%synergy
Grim Guardian
29%inclusion10 decks35 decks
26%synergy
Ghostly Dancers
26%inclusion9 decks35 decks
23%synergy
Archon of Sun's Grace
20%inclusion7 decks35 decks
15%synergy
Sage of Mysteries
20%inclusion7 decks35 decks
20%synergy
Abdel Adrian, Gorion's Ward
20%inclusion7 decks35 decks
18%synergy
Zur the Enchanter
20%inclusion7 decks35 decks
15%synergy
Ancient Cellarspawn
17%inclusion6 decks35 decks
14%synergy
Hullbreaker Horror
17%inclusion6 decks35 decks
11%synergy
Ledger Shredder
17%inclusion6 decks35 decks
8%synergy
Stenn, Paranoid Partisan
14%inclusion5 decks35 decks
13%synergy
Lotho, Corrupt Shirriff
14%inclusion5 decks35 decks
-3%synergy
Overlord of the Mistmoors
14%inclusion5 decks35 decks
12%synergy
Enduring Curiosity
14%inclusion5 decks35 decks
7%synergy
Balemurk Leech
14%inclusion5 decks35 decks
14%synergy
Mindwrack Harpy
14%inclusion5 decks35 decks
14%synergy
Lurrus of the Dream-Den
11%inclusion4 decks35 decks
10%synergy
Valley Floodcaller
11%inclusion4 decks35 decks
7%synergy
Moon-Blessed Cleric
11%inclusion4 decks35 decks
7%synergy
Athreos, Shroud-Veiled
11%inclusion4 decks35 decks
7%synergy
Nashi, Searcher in the Dark
11%inclusion4 decks35 decks
11%synergy
Aminatou, Veil Piercer
11%inclusion4 decks35 decks
10%synergy
Toxrill, the Corrosive
11%inclusion4 decks35 decks
9%synergy
Starnheim Courser
8.6%inclusion3 decks35 decks
5%synergy
Fear of Infinity
8.6%inclusion3 decks35 decks
8%synergy
Witch Enchanter
8.6%inclusion3 decks35 decks
2%synergy
Soaring Lightbringer
8.6%inclusion3 decks35 decks
4%synergy
Skullsnap Nuisance
8.6%inclusion3 decks35 decks
8%synergy
Archetype of Imagination
8.6%inclusion3 decks35 decks
4%synergy
Neerdiv, Devious Diver
8.6%inclusion3 decks35 decks
8%synergy
Emet-Selch of the Third Seat
6.7%inclusion2 decks30 decks
-3%synergy
Summon: Bahamut
6.7%inclusion2 decks30 decks
5%synergy
Eidolon of Rhetoric
5.7%inclusion2 decks35 decks
4%synergy
Gray Merchant of Asphodel
5.7%inclusion2 decks35 decks
1%synergy
Doom Whisperer
5.7%inclusion2 decks35 decks
4%synergy
Dream Eater
5.7%inclusion2 decks35 decks
5%synergy
Esper Sentinel
5.7%inclusion2 decks35 decks
-22%synergy
Horrid Shadowspinner
5.7%inclusion2 decks35 decks
5%synergy
Heliod, Sun-Crowned
5.7%inclusion2 decks35 decks
2%synergy
Hedron Crab
5.7%inclusion2 decks35 decks
5%synergy
Boggart Trawler
5.7%inclusion2 decks35 decks
3%synergy
Archetype of Courage
5.7%inclusion2 decks35 decks
4%synergy
Vilis, Broker of Blood
5.7%inclusion2 decks35 decks
5%synergy
Leonin Relic-Warder
5.7%inclusion2 decks35 decks
5%synergy
Angel of Suffering
5.7%inclusion2 decks35 decks
6%synergy
Instants
An Offer You Can't Refuse
43%inclusion15 decks35 decks
16%synergy
Arcane Denial
40%inclusion14 decks35 decks
20%synergy
Counterspell
34%inclusion12 decks35 decks
-7%synergy
Entomb
31%inclusion11 decks35 decks
25%synergy
Swan Song
29%inclusion10 decks35 decks
9%synergy
Path to Exile
26%inclusion9 decks35 decks
-16%synergy
Void Rend
23%inclusion8 decks35 decks
-11%synergy
Mana Drain
20%inclusion7 decks35 decks
3%synergy
Sink into Stupor
20%inclusion7 decks35 decks
7%synergy
Negate
17%inclusion6 decks35 decks
1%synergy
Thirst for Meaning
17%inclusion6 decks35 decks
16%synergy
Inkshield
17%inclusion6 decks35 decks
8%synergy
Fact or Fiction
14%inclusion5 decks35 decks
10%synergy
Dark Ritual
14%inclusion5 decks35 decks
-5%synergy
Dovin's Veto
11%inclusion4 decks35 decks
-14%synergy
Anguished Unmaking
11%inclusion4 decks35 decks
-14%synergy
Generous Gift
11%inclusion4 decks35 decks
-3%synergy
Fell the Profane
8.6%inclusion3 decks35 decks
0%synergy
Strix Serenade
8.6%inclusion3 decks35 decks
5%synergy
Faithful Mending
8.6%inclusion3 decks35 decks
5%synergy
Frantic Search
5.7%inclusion2 decks35 decks
-12%synergy
Brainstorm
5.7%inclusion2 decks35 decks
-11%synergy
Dawn's Truce
5.7%inclusion2 decks35 decks
1%synergy
Lim-Dûl's Vault
5.7%inclusion2 decks35 decks
2%synergy
Flare of Fortitude
5.7%inclusion2 decks35 decks
3%synergy
Jwari Disruption
5.7%inclusion2 decks35 decks
5%synergy
Delay
5.7%inclusion2 decks35 decks
3%synergy
Utter End
5.7%inclusion2 decks35 decks
-1%synergy
Drown in Dreams
5.7%inclusion2 decks35 decks
5%synergy
Pact of Negation
5.7%inclusion2 decks35 decks
-2%synergy
Sorceries
Sevinne's Reclamation
43%inclusion15 decks35 decks
34%synergy
Redress Fate
23%inclusion8 decks35 decks
17%synergy
Supreme Verdict
20%inclusion7 decks35 decks
5%synergy
Reanimate
20%inclusion7 decks35 decks
4%synergy
Extinguish All Hope
20%inclusion7 decks35 decks
18%synergy
Windfall
17%inclusion6 decks35 decks
3%synergy
Toxic Deluge
17%inclusion6 decks35 decks
-2%synergy
Damn
17%inclusion6 decks35 decks
-3%synergy
Dance of the Manse
17%inclusion6 decks35 decks
14%synergy
Singularity Rupture
15%inclusion4 decks27 decks
12%synergy
Wrath of God
14%inclusion5 decks35 decks
10%synergy
Glimpse the Unthinkable
14%inclusion5 decks35 decks
14%synergy
Idyllic Tutor
14%inclusion5 decks35 decks
10%synergy
Resurgent Belief
11%inclusion4 decks35 decks
9%synergy
Farewell
11%inclusion4 decks35 decks
-2%synergy
Buried Alive
11%inclusion4 decks35 decks
7%synergy
Traumatize
11%inclusion4 decks35 decks
11%synergy
Time Wipe
8.6%inclusion3 decks35 decks
2%synergy
Demonic Counsel
8.6%inclusion3 decks35 decks
7%synergy
Breach the Multiverse
8.6%inclusion3 decks35 decks
6%synergy
Space-Time Anomaly
7.4%inclusion2 decks27 decks
6%synergy
Ponder
5.7%inclusion2 decks35 decks
-3%synergy
Incarnation Technique
5.7%inclusion2 decks35 decks
5%synergy
Ondu Inversion
5.7%inclusion2 decks35 decks
4%synergy
Open the Vaults
5.7%inclusion2 decks35 decks
4%synergy
Cut Your Losses
5.7%inclusion2 decks35 decks
5%synergy
Slaughter the Strong
5.7%inclusion2 decks35 decks
5%synergy
Night's Whisper
5.7%inclusion2 decks35 decks
3%synergy
Brilliant Restoration
5.7%inclusion2 decks35 decks
4%synergy
Compulsive Research
5.7%inclusion2 decks35 decks
5%synergy
Utility Artifacts
Mesmeric Orb
29%inclusion10 decks35 decks
27%synergy
Lightning Greaves
23%inclusion8 decks35 decks
0%synergy
Cloud Key
11%inclusion4 decks35 decks
8%synergy
Whip of Erebos
8.6%inclusion3 decks35 decks
6%synergy
Swiftfoot Boots
8.6%inclusion3 decks35 decks
-15%synergy
Crucible of Worlds
5.7%inclusion2 decks35 decks
5%synergy
Mask of the Schemer
5.7%inclusion2 decks35 decks
5%synergy
Palantír of Orthanc
5.7%inclusion2 decks35 decks
5%synergy
Wishclaw Talisman
5.7%inclusion2 decks35 decks
-3%synergy
Expedition Map
5.7%inclusion2 decks35 decks
4%synergy
Enchantments
Blind Obedience
46%inclusion16 decks35 decks
33%synergy
Cemetery Tampering
46%inclusion16 decks35 decks
45%synergy
Ghostly Prison
46%inclusion16 decks35 decks
24%synergy
Dance of the Dead
43%inclusion15 decks35 decks
41%synergy
Sphere of Safety
43%inclusion15 decks35 decks
33%synergy
Secret Arcade // Dusty Parlor
43%inclusion15 decks35 decks
38%synergy
Propaganda
43%inclusion15 decks35 decks
16%synergy
Sigil of the Empty Throne
40%inclusion14 decks35 decks
34%synergy
Mirrormade
40%inclusion14 decks35 decks
30%synergy
Seal of Cleansing
40%inclusion14 decks35 decks
39%synergy
Out of the Tombs
37%inclusion13 decks35 decks
37%synergy
Estrid's Invocation
37%inclusion13 decks35 decks
33%synergy
The Meathook Massacre
34%inclusion12 decks35 decks
31%synergy
Starfield of Nyx
34%inclusion12 decks35 decks
30%synergy
Touch the Spirit Realm
31%inclusion11 decks35 decks
29%synergy
The Tale of Tamiyo
31%inclusion11 decks35 decks
31%synergy
Darksteel Mutation
29%inclusion10 decks35 decks
22%synergy
Cacophony Unleashed
29%inclusion10 decks35 decks
27%synergy
Ethereal Armor
29%inclusion10 decks35 decks
24%synergy
Trouble in Pairs
29%inclusion10 decks35 decks
23%synergy
Defiled Crypt // Cadaver Lab
29%inclusion10 decks35 decks
28%synergy
Timely Ward
26%inclusion9 decks35 decks
21%synergy
Sheltered by Ghosts
26%inclusion9 decks35 decks
23%synergy
Seal of Removal
26%inclusion9 decks35 decks
25%synergy
Authority of the Consuls
23%inclusion8 decks35 decks
11%synergy
Oubliette
23%inclusion8 decks35 decks
21%synergy
Black Market Connections
23%inclusion8 decks35 decks
9%synergy
Land Tax
23%inclusion8 decks35 decks
17%synergy
Hallowed Haunting
23%inclusion8 decks35 decks
20%synergy
Aura of Silence
23%inclusion8 decks35 decks
20%synergy
Imprisoned in the Moon
20%inclusion7 decks35 decks
13%synergy
Extravagant Replication
20%inclusion7 decks35 decks
15%synergy
Copy Enchantment
20%inclusion7 decks35 decks
15%synergy
Static Prison
20%inclusion7 decks35 decks
20%synergy
Solitary Confinement
20%inclusion7 decks35 decks
18%synergy
Nowhere to Run
20%inclusion7 decks35 decks
19%synergy
Greater Auramancy
20%inclusion7 decks35 decks
16%synergy
Phyrexian Arena
20%inclusion7 decks35 decks
6%synergy
Stillness in Motion
19%inclusion6 decks32 decks
18%synergy
One with the Multiverse
17%inclusion6 decks35 decks
12%synergy
Leyline of Anticipation
17%inclusion6 decks35 decks
13%synergy
Monologue Tax
17%inclusion6 decks35 decks
11%synergy
Secrets of the Dead
17%inclusion6 decks35 decks
17%synergy
Teval's Judgment
16%inclusion5 decks32 decks
15%synergy
Unable to Scream
14%inclusion5 decks35 decks
13%synergy
Tinybones Joins Up
14%inclusion5 decks35 decks
13%synergy
Utter Insignificance
14%inclusion5 decks35 decks
14%synergy
Shark Typhoon
14%inclusion5 decks35 decks
8%synergy
Kaya's Ghostform
14%inclusion5 decks35 decks
12%synergy
Bottomless Pool // Locker Room
14%inclusion5 decks35 decks
12%synergy
Planeswalkers
Ashiok, Dream Render
5.7%inclusion2 decks35 decks
4%synergy
Utility Lands
Bojuka Bog
43%inclusion15 decks35 decks
16%synergy
Cephalid Coliseum
31%inclusion11 decks35 decks
28%synergy
Otawara, Soaring City
29%inclusion10 decks35 decks
9%synergy
Takenuma, Abandoned Mire
14%inclusion5 decks35 decks
8%synergy
Geier Reach Sanitarium
11%inclusion4 decks35 decks
7%synergy
Ishgard, the Holy See
10%inclusion3 decks30 decks
6%synergy
Urza's Saga
8.6%inclusion3 decks35 decks
-3%synergy
Eiganjo, Seat of the Empire
8.6%inclusion3 decks35 decks
3%synergy
Urborg, Tomb of Yawgmoth
8.6%inclusion3 decks35 decks
-5%synergy
Rogue's Passage
8.6%inclusion3 decks35 decks
-1%synergy
Minamo, School at Water's Edge
5.7%inclusion2 decks35 decks
2%synergy
Mystic Sanctuary
5.7%inclusion2 decks35 decks
2%synergy
Mortuary Mire
5.7%inclusion2 decks35 decks
4%synergy
Nephalia Drownyard
5.7%inclusion2 decks35 decks
5%synergy
Emergence Zone
5.7%inclusion2 decks35 decks
4%synergy
Reliquary Tower
5.7%inclusion2 decks35 decks
-28%synergy
Temple of the False God
5.7%inclusion2 decks35 decks
-2%synergy
Vault of the Archangel
5.7%inclusion2 decks35 decks
-1%synergy
Mana Artifacts
Arcane Signet
89%inclusion31 decks35 decks
1%synergy
Sol Ring
86%inclusion30 decks35 decks
-4%synergy
Talisman of Progress
60%inclusion21 decks35 decks
17%synergy
Talisman of Hierarchy
57%inclusion20 decks35 decks
14%synergy
Talisman of Dominance
54%inclusion19 decks35 decks
5%synergy
Orzhov Signet
31%inclusion11 decks35 decks
-3%synergy
Fellwar Stone
29%inclusion10 decks35 decks
-5%synergy
Azorius Signet
29%inclusion10 decks35 decks
-4%synergy
Dimir Signet
23%inclusion8 decks35 decks
-9%synergy
Chromatic Lantern
8.6%inclusion3 decks35 decks
-5%synergy
Mind Stone
5.7%inclusion2 decks35 decks
-7%synergy
Lands
Command Tower
100%inclusion35 decks35 decks
8%synergy
Swamp
91%inclusion32 decks35 decks
0%synergy
Island
91%inclusion32 decks35 decks
-1%synergy
Plains
91%inclusion32 decks35 decks
0%synergy
Caves of Koilos
63%inclusion22 decks35 decks
27%synergy
Godless Shrine
60%inclusion21 decks35 decks
10%synergy
Underground River
60%inclusion21 decks35 decks
27%synergy
Adarkar Wastes
60%inclusion21 decks35 decks
29%synergy
Watery Grave
60%inclusion21 decks35 decks
10%synergy
Exotic Orchard
57%inclusion20 decks35 decks
-1%synergy
Flooded Strand
57%inclusion20 decks35 decks
19%synergy
Hallowed Fountain
54%inclusion19 decks35 decks
5%synergy
Arcane Sanctum
51%inclusion18 decks35 decks
-3%synergy
Polluted Delta
51%inclusion18 decks35 decks
14%synergy
Undercity Sewers
46%inclusion16 decks35 decks
32%synergy
Isolated Chapel
46%inclusion16 decks35 decks
7%synergy
Meticulous Archive
46%inclusion16 decks35 decks
32%synergy
Marsh Flats
46%inclusion16 decks35 decks
9%synergy
Morphic Pool
40%inclusion14 decks35 decks
6%synergy
Shadowy Backstreet
37%inclusion13 decks35 decks
25%synergy
Sea of Clouds
37%inclusion13 decks35 decks
1%synergy
Raffine's Tower
37%inclusion13 decks35 decks
-4%synergy
Vault of Champions
37%inclusion13 decks35 decks
4%synergy
Glacial Fortress
34%inclusion12 decks35 decks
-6%synergy
Drowned Catacomb
34%inclusion12 decks35 decks
-2%synergy
Deserted Beach
34%inclusion12 decks35 decks
13%synergy
Prairie Stream
31%inclusion11 decks35 decks
-9%synergy
Temple of Silence
31%inclusion11 decks35 decks
12%synergy
Temple of Deceit
29%inclusion10 decks35 decks
11%synergy
Sunken Hollow
29%inclusion10 decks35 decks
-11%synergy
Gloomlake Verge
29%inclusion10 decks35 decks
18%synergy
Floodfarm Verge
29%inclusion10 decks35 decks
17%synergy
Terramorphic Expanse
26%inclusion9 decks35 decks
9%synergy
Shipwreck Marsh
26%inclusion9 decks35 decks
5%synergy
Valgavoth's Lair
26%inclusion9 decks35 decks
23%synergy
Temple of Enlightenment
26%inclusion9 decks35 decks
9%synergy
Evolving Wilds
26%inclusion9 decks35 decks
1%synergy
Obscura Storefront
26%inclusion9 decks35 decks
15%synergy
Contaminated Landscape
23%inclusion8 decks35 decks
8%synergy
Bleachbone Verge
20%inclusion7 decks35 decks
12%synergy
Sink into Stupor
20%inclusion7 decks35 decks
7%synergy
Shattered Sanctum
20%inclusion7 decks35 decks
4%synergy
Tainted Isle
17%inclusion6 decks35 decks
11%synergy
Tundra
17%inclusion6 decks35 decks
1%synergy
Misty Rainforest
17%inclusion6 decks35 decks
6%synergy
Azorius Chancery
17%inclusion6 decks35 decks
3%synergy
Fetid Heath
17%inclusion6 decks35 decks
5%synergy
Tainted Field
17%inclusion6 decks35 decks
10%synergy
Underground Sea
17%inclusion6 decks35 decks
1%synergy
Ash Barrens
17%inclusion6 decks35 decks
6%synergy
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