The Master of Keys (Commander) - Upgraded Control

The Master of Keys
Rank #302
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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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Enchantments
Utility Lands
Mana Artifacts
Lands
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Paramecia Coloniex
6.3%inclusion1 decks16 decks
6%synergy
Dream Beavers
6.3%inclusion1 decks16 decks
5%synergy
High Synergy Cards
Ripples of Undeath
76%inclusion32 decks42 decks
74%synergy
Entity Tracker
79%inclusion33 decks42 decks
72%synergy
Inquisitive Glimmer
79%inclusion33 decks42 decks
71%synergy
Gravebreaker Lamia
67%inclusion28 decks42 decks
66%synergy
Starfield Mystic
69%inclusion29 decks42 decks
62%synergy
Animate Dead
69%inclusion29 decks42 decks
60%synergy
Demon of Fate's Design
64%inclusion27 decks42 decks
59%synergy
Scrabbling Skullcrab
60%inclusion25 decks42 decks
59%synergy
Amphibian Downpour
62%inclusion26 decks42 decks
57%synergy
Dress Down
60%inclusion25 decks42 decks
57%synergy
Top Cards
Mesa Enchantress
62%inclusion26 decks42 decks
53%synergy
Mystic Remora
62%inclusion26 decks42 decks
41%synergy
Doomwake Giant
60%inclusion25 decks42 decks
54%synergy
Swords to Plowshares
57%inclusion24 decks42 decks
-11%synergy
Fear of Impostors
55%inclusion23 decks42 decks
53%synergy
Necromancy
55%inclusion23 decks42 decks
50%synergy
Grasp of Fate
52%inclusion22 decks42 decks
46%synergy
Overlord of the Floodpits
50%inclusion21 decks42 decks
46%synergy
Blind Obedience
48%inclusion20 decks42 decks
36%synergy
Sphere of Safety
48%inclusion20 decks42 decks
38%synergy
Game Changers
Smothering Tithe
36%inclusion15 decks42 decks
5%synergy
Rhystic Study
26%inclusion11 decks42 decks
-5%synergy
Gifts Ungiven
14%inclusion6 decks42 decks
12%synergy
Farewell
12%inclusion5 decks42 decks
-1%synergy
Enlightened Tutor
10%inclusion4 decks42 decks
-10%synergy
Consecrated Sphinx
7.1%inclusion3 decks42 decks
1%synergy
Creatures
Fear of Sleep Paralysis
48%inclusion20 decks42 decks
42%synergy
Overlord of the Balemurk
45%inclusion19 decks42 decks
43%synergy
Zur, Eternal Schemer
45%inclusion19 decks42 decks
42%synergy
Ondu Spiritdancer
40%inclusion17 decks42 decks
34%synergy
Victor, Valgavoth's Seneschal
33%inclusion14 decks42 decks
31%synergy
Heliod, the Radiant Dawn
33%inclusion14 decks42 decks
30%synergy
Silent Hallcreeper
31%inclusion13 decks42 decks
26%synergy
Grim Guardian
29%inclusion12 decks42 decks
26%synergy
Ghostly Dancers
29%inclusion12 decks42 decks
26%synergy
Zur the Enchanter
26%inclusion11 decks42 decks
21%synergy
Sage of Mysteries
24%inclusion10 decks42 decks
24%synergy
Archon of Sun's Grace
21%inclusion9 decks42 decks
17%synergy
Abdel Adrian, Gorion's Ward
21%inclusion9 decks42 decks
20%synergy
Balemurk Leech
19%inclusion8 decks42 decks
18%synergy
Ancient Cellarspawn
17%inclusion7 decks42 decks
14%synergy
Hullbreaker Horror
17%inclusion7 decks42 decks
11%synergy
Ledger Shredder
17%inclusion7 decks42 decks
8%synergy
Lotho, Corrupt Shirriff
14%inclusion6 decks42 decks
-3%synergy
Enduring Curiosity
14%inclusion6 decks42 decks
6%synergy
Stenn, Paranoid Partisan
12%inclusion5 decks42 decks
10%synergy
Overlord of the Mistmoors
12%inclusion5 decks42 decks
10%synergy
Moon-Blessed Cleric
12%inclusion5 decks42 decks
7%synergy
Aminatou, Veil Piercer
12%inclusion5 decks42 decks
11%synergy
Nashi, Searcher in the Dark
12%inclusion5 decks42 decks
11%synergy
Mindwrack Harpy
12%inclusion5 decks42 decks
12%synergy
Witch Enchanter
10%inclusion4 decks42 decks
3%synergy
Lurrus of the Dream-Den
10%inclusion4 decks42 decks
8%synergy
Valley Floodcaller
10%inclusion4 decks42 decks
6%synergy
Soaring Lightbringer
10%inclusion4 decks42 decks
5%synergy
Skullsnap Nuisance
10%inclusion4 decks42 decks
9%synergy
Alseid of Life's Bounty
10%inclusion4 decks42 decks
8%synergy
Starnheim Courser
7.1%inclusion3 decks42 decks
3%synergy
Fear of Infinity
7.1%inclusion3 decks42 decks
7%synergy
Hydroelectric Specimen
7.1%inclusion3 decks42 decks
4%synergy
Athreos, Shroud-Veiled
7.1%inclusion3 decks42 decks
3%synergy
Archetype of Imagination
7.1%inclusion3 decks42 decks
2%synergy
Leonin Relic-Warder
7.1%inclusion3 decks42 decks
7%synergy
Neerdiv, Devious Diver
7.1%inclusion3 decks42 decks
7%synergy
Toxrill, the Corrosive
7.1%inclusion3 decks42 decks
5%synergy
Spellskite
7.1%inclusion3 decks42 decks
4%synergy
Summon: Primal Odin
5.4%inclusion2 decks37 decks
1%synergy
Summon: Bahamut
5.4%inclusion2 decks37 decks
4%synergy
Instants
An Offer You Can't Refuse
40%inclusion17 decks42 decks
13%synergy
Arcane Denial
38%inclusion16 decks42 decks
18%synergy
Counterspell
36%inclusion15 decks42 decks
-6%synergy
Entomb
31%inclusion13 decks42 decks
24%synergy
Dovin's Veto
24%inclusion10 decks42 decks
-2%synergy
Void Rend
24%inclusion10 decks42 decks
-11%synergy
Swan Song
24%inclusion10 decks42 decks
4%synergy
Sink into Stupor
21%inclusion9 decks42 decks
9%synergy
Path to Exile
21%inclusion9 decks42 decks
-21%synergy
Negate
19%inclusion8 decks42 decks
3%synergy
Dark Ritual
17%inclusion7 decks42 decks
-3%synergy
Thirst for Meaning
14%inclusion6 decks42 decks
13%synergy
Mana Drain
14%inclusion6 decks42 decks
-3%synergy
Inkshield
14%inclusion6 decks42 decks
5%synergy
Fell the Profane
12%inclusion5 decks42 decks
3%synergy
Generous Gift
12%inclusion5 decks42 decks
-2%synergy
Fact or Fiction
10%inclusion4 decks42 decks
6%synergy
Anguished Unmaking
10%inclusion4 decks42 decks
-16%synergy
Frantic Search
7.1%inclusion3 decks42 decks
-11%synergy
Brainstorm
7.1%inclusion3 decks42 decks
-10%synergy
Strix Serenade
7.1%inclusion3 decks42 decks
4%synergy
Disallow
7.1%inclusion3 decks42 decks
4%synergy
Faithful Mending
7.1%inclusion3 decks42 decks
3%synergy
Sorceries
Sevinne's Reclamation
45%inclusion19 decks42 decks
36%synergy
Windfall
21%inclusion9 decks42 decks
8%synergy
Redress Fate
21%inclusion9 decks42 decks
16%synergy
Singularity Rupture
20%inclusion7 decks35 decks
18%synergy
Extinguish All Hope
19%inclusion8 decks42 decks
17%synergy
Dance of the Manse
19%inclusion8 decks42 decks
16%synergy
Supreme Verdict
14%inclusion6 decks42 decks
0%synergy
Resurgent Belief
14%inclusion6 decks42 decks
12%synergy
Wrath of God
14%inclusion6 decks42 decks
11%synergy
Glimpse the Unthinkable
14%inclusion6 decks42 decks
14%synergy
Reanimate
14%inclusion6 decks42 decks
-2%synergy
Toxic Deluge
14%inclusion6 decks42 decks
-5%synergy
Time Wipe
12%inclusion5 decks42 decks
5%synergy
Idyllic Tutor
12%inclusion5 decks42 decks
8%synergy
Damn
12%inclusion5 decks42 decks
-8%synergy
Austere Command
10%inclusion4 decks42 decks
1%synergy
Buried Alive
10%inclusion4 decks42 decks
5%synergy
Traumatize
10%inclusion4 decks42 decks
9%synergy
Ponder
7.1%inclusion3 decks42 decks
-2%synergy
Open the Vaults
7.1%inclusion3 decks42 decks
6%synergy
Cut Your Losses
7.1%inclusion3 decks42 decks
7%synergy
Demonic Counsel
7.1%inclusion3 decks42 decks
6%synergy
Breach the Multiverse
7.1%inclusion3 decks42 decks
5%synergy
Space-Time Anomaly
5.7%inclusion2 decks35 decks
4%synergy
Utility Artifacts
Mesmeric Orb
29%inclusion12 decks42 decks
27%synergy
Lightning Greaves
24%inclusion10 decks42 decks
1%synergy
Swiftfoot Boots
12%inclusion5 decks42 decks
-12%synergy
Cloud Key
10%inclusion4 decks42 decks
6%synergy
Crucible of Worlds
10%inclusion4 decks42 decks
9%synergy
Whip of Erebos
7.1%inclusion3 decks42 decks
5%synergy
Enchantments
Estrid's Invocation
45%inclusion19 decks42 decks
41%synergy
Mirrormade
43%inclusion18 decks42 decks
33%synergy
Secret Arcade // Dusty Parlor
43%inclusion18 decks42 decks
38%synergy
Ghostly Prison
43%inclusion18 decks42 decks
21%synergy
Cemetery Tampering
40%inclusion17 decks42 decks
40%synergy
Dance of the Dead
38%inclusion16 decks42 decks
36%synergy
Propaganda
38%inclusion16 decks42 decks
10%synergy
Darksteel Mutation
36%inclusion15 decks42 decks
30%synergy
Sigil of the Empty Throne
36%inclusion15 decks42 decks
30%synergy
Seal of Cleansing
36%inclusion15 decks42 decks
34%synergy
Sheltered by Ghosts
36%inclusion15 decks42 decks
33%synergy
Cacophony Unleashed
33%inclusion14 decks42 decks
32%synergy
Starfield of Nyx
33%inclusion14 decks42 decks
29%synergy
Imprisoned in the Moon
29%inclusion12 decks42 decks
22%synergy
Out of the Tombs
29%inclusion12 decks42 decks
28%synergy
Touch the Spirit Realm
29%inclusion12 decks42 decks
26%synergy
Ethereal Armor
29%inclusion12 decks42 decks
24%synergy
Hallowed Haunting
29%inclusion12 decks42 decks
26%synergy
Oubliette
29%inclusion12 decks42 decks
27%synergy
The Meathook Massacre
26%inclusion11 decks42 decks
23%synergy
Authority of the Consuls
26%inclusion11 decks42 decks
14%synergy
The Tale of Tamiyo
26%inclusion11 decks42 decks
26%synergy
Defiled Crypt // Cadaver Lab
26%inclusion11 decks42 decks
25%synergy
Aura of Silence
26%inclusion11 decks42 decks
23%synergy
Seal of Removal
26%inclusion11 decks42 decks
26%synergy
Static Prison
24%inclusion10 decks42 decks
23%synergy
Trouble in Pairs
24%inclusion10 decks42 decks
18%synergy
Solitary Confinement
24%inclusion10 decks42 decks
22%synergy
Extravagant Replication
21%inclusion9 decks42 decks
16%synergy
Copy Enchantment
21%inclusion9 decks42 decks
17%synergy
Timely Ward
21%inclusion9 decks42 decks
16%synergy
Nowhere to Run
21%inclusion9 decks42 decks
20%synergy
Greater Auramancy
21%inclusion9 decks42 decks
17%synergy
Leyline of Anticipation
19%inclusion8 decks42 decks
15%synergy
Monologue Tax
19%inclusion8 decks42 decks
13%synergy
Stillness in Motion
18%inclusion7 decks39 decks
18%synergy
Black Market Connections
17%inclusion7 decks42 decks
2%synergy
Phyrexian Arena
17%inclusion7 decks42 decks
3%synergy
Land Tax
17%inclusion7 decks42 decks
11%synergy
One with the Multiverse
14%inclusion6 decks42 decks
10%synergy
Tinybones Joins Up
14%inclusion6 decks42 decks
13%synergy
Utter Insignificance
14%inclusion6 decks42 decks
14%synergy
Shark Typhoon
14%inclusion6 decks42 decks
8%synergy
All That Glitters
14%inclusion6 decks42 decks
6%synergy
Out of Time
14%inclusion6 decks42 decks
13%synergy
Secrets of the Dead
14%inclusion6 decks42 decks
14%synergy
Teval's Judgment
13%inclusion5 decks39 decks
12%synergy
Smuggler's Share
12%inclusion5 decks42 decks
10%synergy
Court of Cunning
12%inclusion5 decks42 decks
11%synergy
Unable to Scream
12%inclusion5 decks42 decks
11%synergy
Utility Lands
Hall of Heliod's Generosity
67%inclusion28 decks42 decks
54%synergy
Bojuka Bog
43%inclusion18 decks42 decks
16%synergy
Otawara, Soaring City
26%inclusion11 decks42 decks
7%synergy
Cephalid Coliseum
24%inclusion10 decks42 decks
20%synergy
Takenuma, Abandoned Mire
17%inclusion7 decks42 decks
10%synergy
Geier Reach Sanitarium
10%inclusion4 decks42 decks
5%synergy
Eiganjo, Seat of the Empire
10%inclusion4 decks42 decks
4%synergy
Reliquary Tower
10%inclusion4 decks42 decks
-24%synergy
Rogue's Passage
10%inclusion4 decks42 decks
0%synergy
Temple of the False God
10%inclusion4 decks42 decks
2%synergy
Urza's Saga
7.1%inclusion3 decks42 decks
-5%synergy
Urborg, Tomb of Yawgmoth
7.1%inclusion3 decks42 decks
-6%synergy
Adagia, Windswept Bastion
5.7%inclusion2 decks35 decks
3%synergy
Ishgard, the Holy See
5.4%inclusion2 decks37 decks
2%synergy
Mana Artifacts
Arcane Signet
88%inclusion37 decks42 decks
0%synergy
Sol Ring
86%inclusion36 decks42 decks
-4%synergy
Talisman of Progress
62%inclusion26 decks42 decks
18%synergy
Talisman of Hierarchy
55%inclusion23 decks42 decks
11%synergy
Talisman of Dominance
52%inclusion22 decks42 decks
3%synergy
Fellwar Stone
36%inclusion15 decks42 decks
2%synergy
Azorius Signet
33%inclusion14 decks42 decks
3%synergy
Orzhov Signet
31%inclusion13 decks42 decks
-2%synergy
Dimir Signet
24%inclusion10 decks42 decks
-7%synergy
Mind Stone
10%inclusion4 decks42 decks
-3%synergy
Chromatic Lantern
7.1%inclusion3 decks42 decks
-6%synergy
Bender's Waterskin
6.3%inclusion2 decks32 decks
1%synergy
Lands
Command Tower
100%inclusion42 decks42 decks
7%synergy
Swamp
95%inclusion40 decks42 decks
4%synergy
Island
95%inclusion40 decks42 decks
2%synergy
Plains
95%inclusion40 decks42 decks
3%synergy
Caves of Koilos
64%inclusion27 decks42 decks
29%synergy
Exotic Orchard
64%inclusion27 decks42 decks
6%synergy
Adarkar Wastes
62%inclusion26 decks42 decks
30%synergy
Hallowed Fountain
62%inclusion26 decks42 decks
12%synergy
Watery Grave
62%inclusion26 decks42 decks
11%synergy
Godless Shrine
57%inclusion24 decks42 decks
6%synergy
Underground River
57%inclusion24 decks42 decks
23%synergy
Arcane Sanctum
52%inclusion22 decks42 decks
-2%synergy
Flooded Strand
52%inclusion22 decks42 decks
14%synergy
Undercity Sewers
50%inclusion21 decks42 decks
35%synergy
Polluted Delta
50%inclusion21 decks42 decks
12%synergy
Isolated Chapel
48%inclusion20 decks42 decks
7%synergy
Meticulous Archive
48%inclusion20 decks42 decks
34%synergy
Marsh Flats
43%inclusion18 decks42 decks
7%synergy
Shadowy Backstreet
40%inclusion17 decks42 decks
28%synergy
Vault of Champions
40%inclusion17 decks42 decks
8%synergy
Sea of Clouds
38%inclusion16 decks42 decks
3%synergy
Morphic Pool
38%inclusion16 decks42 decks
4%synergy
Glacial Fortress
36%inclusion15 decks42 decks
-6%synergy
Drowned Catacomb
36%inclusion15 decks42 decks
-2%synergy
Prairie Stream
33%inclusion14 decks42 decks
-7%synergy
Raffine's Tower
33%inclusion14 decks42 decks
-8%synergy
Deserted Beach
33%inclusion14 decks42 decks
13%synergy
Sunken Hollow
33%inclusion14 decks42 decks
-6%synergy
Floodfarm Verge
33%inclusion14 decks42 decks
22%synergy
Terramorphic Expanse
31%inclusion13 decks42 decks
15%synergy
Valgavoth's Lair
31%inclusion13 decks42 decks
28%synergy
Evolving Wilds
31%inclusion13 decks42 decks
6%synergy
Shipwreck Marsh
29%inclusion12 decks42 decks
8%synergy
Gloomlake Verge
29%inclusion12 decks42 decks
18%synergy
Temple of Deceit
24%inclusion10 decks42 decks
6%synergy
Ash Barrens
24%inclusion10 decks42 decks
13%synergy
Temple of Silence
24%inclusion10 decks42 decks
5%synergy
Contaminated Landscape
21%inclusion9 decks42 decks
8%synergy
Underground Sea
21%inclusion9 decks42 decks
6%synergy
Temple of Enlightenment
21%inclusion9 decks42 decks
5%synergy
Sink into Stupor
21%inclusion9 decks42 decks
9%synergy
Scrubland
21%inclusion9 decks42 decks
6%synergy
Obscura Storefront
21%inclusion9 decks42 decks
12%synergy
Tundra
19%inclusion8 decks42 decks
3%synergy
Azorius Chancery
19%inclusion8 decks42 decks
5%synergy
Tainted Field
19%inclusion8 decks42 decks
12%synergy
Skycloud Expanse
19%inclusion8 decks42 decks
4%synergy
Shattered Sanctum
19%inclusion8 decks42 decks
3%synergy
Tainted Isle
17%inclusion7 decks42 decks
10%synergy
Bleachbone Verge
17%inclusion7 decks42 decks
8%synergy
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