The Master of Keys (Commander) - Upgraded Control

The Master of Keys
Rank #305
43decks
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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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Mornsong Aria
4.8%inclusion1 decks21 decks
4%synergy
Grave Venerations
4.8%inclusion1 decks21 decks
4%synergy
High Synergy Cards
Ripples of Undeath
77%inclusion33 decks43 decks
74%synergy
Entity Tracker
77%inclusion33 decks43 decks
71%synergy
Inquisitive Glimmer
77%inclusion33 decks43 decks
69%synergy
Dress Down
65%inclusion28 decks43 decks
63%synergy
Gravebreaker Lamia
63%inclusion27 decks43 decks
62%synergy
Amphibian Downpour
65%inclusion28 decks43 decks
61%synergy
Animate Dead
70%inclusion30 decks43 decks
60%synergy
Starfield Mystic
65%inclusion28 decks43 decks
58%synergy
Demon of Fate's Design
63%inclusion27 decks43 decks
57%synergy
Doomwake Giant
60%inclusion26 decks43 decks
55%synergy
Top Cards
Mesa Enchantress
63%inclusion27 decks43 decks
54%synergy
Mystic Remora
60%inclusion26 decks43 decks
40%synergy
Necromancy
56%inclusion24 decks43 decks
51%synergy
Scrabbling Skullcrab
53%inclusion23 decks43 decks
52%synergy
Fear of Impostors
53%inclusion23 decks43 decks
52%synergy
Swords to Plowshares
53%inclusion23 decks43 decks
-15%synergy
Grasp of Fate
51%inclusion22 decks43 decks
45%synergy
Sevinne's Reclamation
49%inclusion21 decks43 decks
40%synergy
Blind Obedience
49%inclusion21 decks43 decks
37%synergy
Overlord of the Floodpits
47%inclusion20 decks43 decks
43%synergy
Game Changers
Smothering Tithe
33%inclusion14 decks43 decks
1%synergy
Rhystic Study
26%inclusion11 decks43 decks
-6%synergy
Gifts Ungiven
14%inclusion6 decks43 decks
12%synergy
Farewell
12%inclusion5 decks43 decks
-1%synergy
Enlightened Tutor
9.3%inclusion4 decks43 decks
-10%synergy
Teferi's Protection
7.0%inclusion3 decks43 decks
-10%synergy
Consecrated Sphinx
7.0%inclusion3 decks43 decks
1%synergy
Demonic Tutor
7.0%inclusion3 decks43 decks
-14%synergy
Creatures
Overlord of the Balemurk
44%inclusion19 decks43 decks
42%synergy
Fear of Sleep Paralysis
44%inclusion19 decks43 decks
39%synergy
Zur, Eternal Schemer
44%inclusion19 decks43 decks
41%synergy
Ondu Spiritdancer
42%inclusion18 decks43 decks
36%synergy
Heliod, the Radiant Dawn
35%inclusion15 decks43 decks
31%synergy
Victor, Valgavoth's Seneschal
33%inclusion14 decks43 decks
31%synergy
Silent Hallcreeper
28%inclusion12 decks43 decks
23%synergy
Zur the Enchanter
28%inclusion12 decks43 decks
23%synergy
Grim Guardian
26%inclusion11 decks43 decks
23%synergy
Ghostly Dancers
26%inclusion11 decks43 decks
23%synergy
Archon of Sun's Grace
23%inclusion10 decks43 decks
19%synergy
Sage of Mysteries
23%inclusion10 decks43 decks
23%synergy
Abdel Adrian, Gorion's Ward
21%inclusion9 decks43 decks
19%synergy
Lotho, Corrupt Shirriff
16%inclusion7 decks43 decks
-1%synergy
Ledger Shredder
16%inclusion7 decks43 decks
8%synergy
Stenn, Paranoid Partisan
14%inclusion6 decks43 decks
13%synergy
Moon-Blessed Cleric
14%inclusion6 decks43 decks
9%synergy
Enduring Curiosity
14%inclusion6 decks43 decks
6%synergy
Balemurk Leech
14%inclusion6 decks43 decks
13%synergy
Ancient Cellarspawn
14%inclusion6 decks43 decks
11%synergy
Hullbreaker Horror
14%inclusion6 decks43 decks
8%synergy
Witch Enchanter
12%inclusion5 decks43 decks
5%synergy
Overlord of the Mistmoors
12%inclusion5 decks43 decks
10%synergy
Nashi, Searcher in the Dark
12%inclusion5 decks43 decks
11%synergy
Alseid of Life's Bounty
12%inclusion5 decks43 decks
10%synergy
Mindwrack Harpy
12%inclusion5 decks43 decks
11%synergy
Valley Floodcaller
9.3%inclusion4 decks43 decks
5%synergy
Soaring Lightbringer
9.3%inclusion4 decks43 decks
5%synergy
Skullsnap Nuisance
9.3%inclusion4 decks43 decks
9%synergy
Aminatou, Veil Piercer
9.3%inclusion4 decks43 decks
8%synergy
Starnheim Courser
7.0%inclusion3 decks43 decks
3%synergy
Fear of Infinity
7.0%inclusion3 decks43 decks
6%synergy
Lurrus of the Dream-Den
7.0%inclusion3 decks43 decks
5%synergy
Doom Whisperer
7.0%inclusion3 decks43 decks
5%synergy
Esper Sentinel
7.0%inclusion3 decks43 decks
-20%synergy
Hedron Crab
7.0%inclusion3 decks43 decks
6%synergy
Angel of Suffering
7.0%inclusion3 decks43 decks
7%synergy
Athreos, Shroud-Veiled
7.0%inclusion3 decks43 decks
3%synergy
Spirited Companion
7.0%inclusion3 decks43 decks
5%synergy
Archetype of Imagination
7.0%inclusion3 decks43 decks
2%synergy
Laboratory Maniac
7.0%inclusion3 decks43 decks
4%synergy
Neerdiv, Devious Diver
7.0%inclusion3 decks43 decks
7%synergy
Toxrill, the Corrosive
7.0%inclusion3 decks43 decks
4%synergy
Emet-Selch of the Third Seat
5.3%inclusion2 decks38 decks
-4%synergy
Summon: Bahamut
5.3%inclusion2 decks38 decks
4%synergy
Instants
An Offer You Can't Refuse
42%inclusion18 decks43 decks
15%synergy
Arcane Denial
37%inclusion16 decks43 decks
17%synergy
Counterspell
35%inclusion15 decks43 decks
-7%synergy
Entomb
30%inclusion13 decks43 decks
23%synergy
Void Rend
26%inclusion11 decks43 decks
-9%synergy
Swan Song
26%inclusion11 decks43 decks
6%synergy
Dovin's Veto
23%inclusion10 decks43 decks
-2%synergy
Path to Exile
23%inclusion10 decks43 decks
-19%synergy
Negate
19%inclusion8 decks43 decks
2%synergy
Sink into Stupor
19%inclusion8 decks43 decks
6%synergy
Dark Ritual
16%inclusion7 decks43 decks
-3%synergy
Mana Drain
16%inclusion7 decks43 decks
-1%synergy
Inkshield
14%inclusion6 decks43 decks
4%synergy
Fell the Profane
12%inclusion5 decks43 decks
3%synergy
Thirst for Meaning
12%inclusion5 decks43 decks
10%synergy
Generous Gift
12%inclusion5 decks43 decks
-3%synergy
Fact or Fiction
9.3%inclusion4 decks43 decks
6%synergy
Anguished Unmaking
9.3%inclusion4 decks43 decks
-16%synergy
Brainstorm
7.0%inclusion3 decks43 decks
-10%synergy
Strix Serenade
7.0%inclusion3 decks43 decks
3%synergy
Faithful Mending
7.0%inclusion3 decks43 decks
3%synergy
Otherworldly Gaze
7.0%inclusion3 decks43 decks
5%synergy
Sorceries
Redress Fate
23%inclusion10 decks43 decks
18%synergy
Extinguish All Hope
21%inclusion9 decks43 decks
19%synergy
Dance of the Manse
21%inclusion9 decks43 decks
18%synergy
Singularity Rupture
20%inclusion7 decks35 decks
18%synergy
Windfall
19%inclusion8 decks43 decks
5%synergy
Glimpse the Unthinkable
19%inclusion8 decks43 decks
18%synergy
Reanimate
16%inclusion7 decks43 decks
0%synergy
Supreme Verdict
14%inclusion6 decks43 decks
-1%synergy
Resurgent Belief
14%inclusion6 decks43 decks
12%synergy
Wrath of God
14%inclusion6 decks43 decks
10%synergy
Time Wipe
12%inclusion5 decks43 decks
5%synergy
Idyllic Tutor
12%inclusion5 decks43 decks
7%synergy
Toxic Deluge
12%inclusion5 decks43 decks
-8%synergy
Damn
12%inclusion5 decks43 decks
-9%synergy
Austere Command
9.3%inclusion4 decks43 decks
1%synergy
Open the Vaults
9.3%inclusion4 decks43 decks
8%synergy
Buried Alive
9.3%inclusion4 decks43 decks
5%synergy
Traumatize
9.3%inclusion4 decks43 decks
9%synergy
Space-Time Anomaly
8.6%inclusion3 decks35 decks
7%synergy
Ponder
7.0%inclusion3 decks43 decks
-2%synergy
Cut Your Losses
7.0%inclusion3 decks43 decks
7%synergy
Demonic Counsel
7.0%inclusion3 decks43 decks
6%synergy
Breach the Multiverse
7.0%inclusion3 decks43 decks
5%synergy
Utility Artifacts
Mesmeric Orb
28%inclusion12 decks43 decks
27%synergy
Lightning Greaves
23%inclusion10 decks43 decks
1%synergy
Swiftfoot Boots
12%inclusion5 decks43 decks
-13%synergy
Cloud Key
9.3%inclusion4 decks43 decks
6%synergy
Crucible of Worlds
7.0%inclusion3 decks43 decks
6%synergy
Whip of Erebos
7.0%inclusion3 decks43 decks
5%synergy
Enchantments
Estrid's Invocation
47%inclusion20 decks43 decks
42%synergy
Sphere of Safety
47%inclusion20 decks43 decks
37%synergy
Mirrormade
44%inclusion19 decks43 decks
34%synergy
Cemetery Tampering
44%inclusion19 decks43 decks
43%synergy
Seal of Cleansing
42%inclusion18 decks43 decks
40%synergy
Secret Arcade // Dusty Parlor
42%inclusion18 decks43 decks
37%synergy
Ghostly Prison
42%inclusion18 decks43 decks
20%synergy
Dance of the Dead
40%inclusion17 decks43 decks
37%synergy
Sigil of the Empty Throne
40%inclusion17 decks43 decks
34%synergy
Propaganda
40%inclusion17 decks43 decks
12%synergy
Starfield of Nyx
35%inclusion15 decks43 decks
31%synergy
Darksteel Mutation
33%inclusion14 decks43 decks
26%synergy
Cacophony Unleashed
33%inclusion14 decks43 decks
31%synergy
Out of the Tombs
33%inclusion14 decks43 decks
32%synergy
Touch the Spirit Realm
33%inclusion14 decks43 decks
30%synergy
Imprisoned in the Moon
30%inclusion13 decks43 decks
24%synergy
The Tale of Tamiyo
30%inclusion13 decks43 decks
30%synergy
Sheltered by Ghosts
30%inclusion13 decks43 decks
28%synergy
Ethereal Armor
30%inclusion13 decks43 decks
26%synergy
Seal of Removal
30%inclusion13 decks43 decks
30%synergy
The Meathook Massacre
28%inclusion12 decks43 decks
25%synergy
Authority of the Consuls
28%inclusion12 decks43 decks
16%synergy
Oubliette
28%inclusion12 decks43 decks
26%synergy
Aura of Silence
28%inclusion12 decks43 decks
25%synergy
Copy Enchantment
26%inclusion11 decks43 decks
21%synergy
Solitary Confinement
26%inclusion11 decks43 decks
24%synergy
Hallowed Haunting
26%inclusion11 decks43 decks
23%synergy
Timely Ward
23%inclusion10 decks43 decks
18%synergy
Greater Auramancy
23%inclusion10 decks43 decks
19%synergy
Extravagant Replication
21%inclusion9 decks43 decks
16%synergy
Static Prison
21%inclusion9 decks43 decks
20%synergy
Nowhere to Run
21%inclusion9 decks43 decks
20%synergy
Trouble in Pairs
21%inclusion9 decks43 decks
16%synergy
Defiled Crypt // Cadaver Lab
21%inclusion9 decks43 decks
20%synergy
Stillness in Motion
20%inclusion8 decks40 decks
20%synergy
Leyline of Anticipation
19%inclusion8 decks43 decks
14%synergy
Monologue Tax
19%inclusion8 decks43 decks
12%synergy
Land Tax
19%inclusion8 decks43 decks
13%synergy
Shark Typhoon
16%inclusion7 decks43 decks
10%synergy
All That Glitters
16%inclusion7 decks43 decks
8%synergy
Black Market Connections
16%inclusion7 decks43 decks
2%synergy
Phyrexian Arena
16%inclusion7 decks43 decks
2%synergy
Secrets of the Dead
16%inclusion7 decks43 decks
16%synergy
Teval's Judgment
15%inclusion6 decks40 decks
14%synergy
One with the Multiverse
14%inclusion6 decks43 decks
9%synergy
Utter Insignificance
14%inclusion6 decks43 decks
13%synergy
Smuggler's Share
12%inclusion5 decks43 decks
10%synergy
Unable to Scream
12%inclusion5 decks43 decks
11%synergy
Tinybones Joins Up
12%inclusion5 decks43 decks
10%synergy
Court of Cunning
12%inclusion5 decks43 decks
11%synergy
Utility Lands
Hall of Heliod's Generosity
67%inclusion29 decks43 decks
54%synergy
Bojuka Bog
44%inclusion19 decks43 decks
17%synergy
Cephalid Coliseum
26%inclusion11 decks43 decks
22%synergy
Otawara, Soaring City
23%inclusion10 decks43 decks
4%synergy
Takenuma, Abandoned Mire
16%inclusion7 decks43 decks
10%synergy
Geier Reach Sanitarium
9.3%inclusion4 decks43 decks
5%synergy
Eiganjo, Seat of the Empire
9.3%inclusion4 decks43 decks
4%synergy
Reliquary Tower
9.3%inclusion4 decks43 decks
-25%synergy
Rogue's Passage
9.3%inclusion4 decks43 decks
0%synergy
Ishgard, the Holy See
7.9%inclusion3 decks38 decks
4%synergy
Temple of the False God
7.0%inclusion3 decks43 decks
-1%synergy
Urborg, Tomb of Yawgmoth
7.0%inclusion3 decks43 decks
-6%synergy
Adagia, Windswept Bastion
5.7%inclusion2 decks35 decks
3%synergy
Mana Artifacts
Arcane Signet
86%inclusion37 decks43 decks
-2%synergy
Sol Ring
86%inclusion37 decks43 decks
-4%synergy
Talisman of Progress
63%inclusion27 decks43 decks
19%synergy
Talisman of Hierarchy
53%inclusion23 decks43 decks
10%synergy
Talisman of Dominance
51%inclusion22 decks43 decks
1%synergy
Fellwar Stone
35%inclusion15 decks43 decks
1%synergy
Azorius Signet
35%inclusion15 decks43 decks
4%synergy
Orzhov Signet
33%inclusion14 decks43 decks
0%synergy
Dimir Signet
23%inclusion10 decks43 decks
-8%synergy
Mind Stone
12%inclusion5 decks43 decks
-1%synergy
Chromatic Lantern
9.3%inclusion4 decks43 decks
-4%synergy
Bender's Waterskin
6.3%inclusion2 decks32 decks
1%synergy
Lands
Command Tower
100%inclusion43 decks43 decks
7%synergy
Swamp
95%inclusion41 decks43 decks
4%synergy
Island
95%inclusion41 decks43 decks
2%synergy
Plains
95%inclusion41 decks43 decks
4%synergy
Caves of Koilos
67%inclusion29 decks43 decks
32%synergy
Exotic Orchard
65%inclusion28 decks43 decks
6%synergy
Adarkar Wastes
65%inclusion28 decks43 decks
34%synergy
Hallowed Fountain
60%inclusion26 decks43 decks
10%synergy
Watery Grave
60%inclusion26 decks43 decks
10%synergy
Underground River
58%inclusion25 decks43 decks
24%synergy
Godless Shrine
56%inclusion24 decks43 decks
5%synergy
Flooded Strand
53%inclusion23 decks43 decks
15%synergy
Polluted Delta
51%inclusion22 decks43 decks
13%synergy
Undercity Sewers
49%inclusion21 decks43 decks
34%synergy
Arcane Sanctum
49%inclusion21 decks43 decks
-6%synergy
Meticulous Archive
49%inclusion21 decks43 decks
35%synergy
Isolated Chapel
44%inclusion19 decks43 decks
4%synergy
Marsh Flats
44%inclusion19 decks43 decks
8%synergy
Shadowy Backstreet
42%inclusion18 decks43 decks
29%synergy
Morphic Pool
40%inclusion17 decks43 decks
6%synergy
Vault of Champions
40%inclusion17 decks43 decks
7%synergy
Glacial Fortress
37%inclusion16 decks43 decks
-4%synergy
Sea of Clouds
37%inclusion16 decks43 decks
2%synergy
Drowned Catacomb
37%inclusion16 decks43 decks
0%synergy
Prairie Stream
35%inclusion15 decks43 decks
-6%synergy
Sunken Hollow
35%inclusion15 decks43 decks
-5%synergy
Terramorphic Expanse
33%inclusion14 decks43 decks
16%synergy
Raffine's Tower
33%inclusion14 decks43 decks
-8%synergy
Evolving Wilds
33%inclusion14 decks43 decks
8%synergy
Deserted Beach
33%inclusion14 decks43 decks
12%synergy
Valgavoth's Lair
30%inclusion13 decks43 decks
28%synergy
Gloomlake Verge
30%inclusion13 decks43 decks
19%synergy
Floodfarm Verge
30%inclusion13 decks43 decks
19%synergy
Shipwreck Marsh
28%inclusion12 decks43 decks
7%synergy
Temple of Silence
26%inclusion11 decks43 decks
7%synergy
Contaminated Landscape
23%inclusion10 decks43 decks
9%synergy
Ash Barrens
23%inclusion10 decks43 decks
13%synergy
Obscura Storefront
23%inclusion10 decks43 decks
13%synergy
Azorius Chancery
21%inclusion9 decks43 decks
7%synergy
Temple of Deceit
21%inclusion9 decks43 decks
3%synergy
Tainted Field
21%inclusion9 decks43 decks
14%synergy
Temple of Enlightenment
21%inclusion9 decks43 decks
5%synergy
Tundra
19%inclusion8 decks43 decks
3%synergy
Tainted Isle
19%inclusion8 decks43 decks
12%synergy
Fetid Heath
19%inclusion8 decks43 decks
6%synergy
Underground Sea
19%inclusion8 decks43 decks
3%synergy
Skycloud Expanse
19%inclusion8 decks43 decks
4%synergy
Sink into Stupor
19%inclusion8 decks43 decks
6%synergy
Scrubland
19%inclusion8 decks43 decks
3%synergy
Shattered Sanctum
19%inclusion8 decks43 decks
2%synergy
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