The Master of Keys (Commander) - Upgraded Auras

The Master of Keys
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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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Instants
Sorceries
Utility Artifacts
Enchantments
Utility Lands
Mana Artifacts
Lands
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Ripples of Undeath
100%inclusion5 decks5 decks
97%synergy
Ethereal Armor
100%inclusion5 decks5 decks
95%synergy
Otherworldly Gaze
80%inclusion4 decks5 decks
78%synergy
Starfield Mystic
80%inclusion4 decks5 decks
73%synergy
Inquisitive Glimmer
80%inclusion4 decks5 decks
72%synergy
All That Glitters
80%inclusion4 decks5 decks
71%synergy
Frantic Search
80%inclusion4 decks5 decks
63%synergy
Game Changers
Teferi's Protection
40%inclusion2 decks5 decks
23%synergy
Rhystic Study
20%inclusion1 decks5 decks
-12%synergy
Gifts Ungiven
20%inclusion1 decks5 decks
18%synergy
Creatures
Scrabbling Skullcrab
60%inclusion3 decks5 decks
59%synergy
Gravebreaker Lamia
60%inclusion3 decks5 decks
59%synergy
Entity Tracker
60%inclusion3 decks5 decks
53%synergy
Overlord of the Floodpits
40%inclusion2 decks5 decks
36%synergy
Eidolon of Countless Battles
40%inclusion2 decks5 decks
39%synergy
Katilda, Dawnhart Martyr
40%inclusion2 decks5 decks
40%synergy
Nighthowler
40%inclusion2 decks5 decks
40%synergy
Fear of Impostors
40%inclusion2 decks5 decks
38%synergy
Silent Hallcreeper
40%inclusion2 decks5 decks
36%synergy
Mesa Enchantress
40%inclusion2 decks5 decks
31%synergy
Victor, Valgavoth's Seneschal
40%inclusion2 decks5 decks
38%synergy
Deranged Assistant
40%inclusion2 decks5 decks
40%synergy
Zur, Eternal Schemer
40%inclusion2 decks5 decks
37%synergy
Ondu Spiritdancer
40%inclusion2 decks5 decks
34%synergy
Zur the Enchanter
40%inclusion2 decks5 decks
35%synergy
Baleful Eidolon
20%inclusion1 decks5 decks
20%synergy
Heliod's Pilgrim
20%inclusion1 decks5 decks
19%synergy
Spirit of the Labyrinth
20%inclusion1 decks5 decks
19%synergy
Syr Konrad, the Grim
20%inclusion1 decks5 decks
14%synergy
Picklock Prankster
20%inclusion1 decks5 decks
20%synergy
The Mindskinner
20%inclusion1 decks5 decks
19%synergy
Eidolon of Rhetoric
20%inclusion1 decks5 decks
18%synergy
Restoration Specialist
20%inclusion1 decks5 decks
20%synergy
Baleful Strix
20%inclusion1 decks5 decks
0%synergy
Danitha Capashen, Paragon
20%inclusion1 decks5 decks
16%synergy
Mirrorhall Mimic
20%inclusion1 decks5 decks
19%synergy
Salvage Scout
20%inclusion1 decks5 decks
20%synergy
Demon of Fate's Design
20%inclusion1 decks5 decks
14%synergy
Nyx-Fleece Ram
20%inclusion1 decks5 decks
19%synergy
Esper Sentinel
20%inclusion1 decks5 decks
-8%synergy
Tymaret, Chosen from Death
20%inclusion1 decks5 decks
20%synergy
Hedron Crab
20%inclusion1 decks5 decks
19%synergy
Boggart Trawler
20%inclusion1 decks5 decks
17%synergy
Moon-Circuit Hacker
20%inclusion1 decks5 decks
20%synergy
Perplexing Chimera
20%inclusion1 decks5 decks
19%synergy
Oriq Loremage
20%inclusion1 decks5 decks
19%synergy
Overlord of the Mistmoors
20%inclusion1 decks5 decks
18%synergy
Enduring Curiosity
20%inclusion1 decks5 decks
12%synergy
Daxos, Blessed by the Sun
20%inclusion1 decks5 decks
19%synergy
Cynical Loner
20%inclusion1 decks5 decks
20%synergy
Fear of Sleep Paralysis
20%inclusion1 decks5 decks
14%synergy
Archaeomancer
20%inclusion1 decks5 decks
18%synergy
Creeping Peeper
20%inclusion1 decks5 decks
20%synergy
Neerdiv, Devious Diver
20%inclusion1 decks5 decks
20%synergy
Snaremaster Sprite
20%inclusion1 decks5 decks
20%synergy
Faerie Seer
20%inclusion1 decks5 decks
20%synergy
Ancient Cellarspawn
20%inclusion1 decks5 decks
17%synergy
Doomwake Giant
20%inclusion1 decks5 decks
14%synergy
Aminatou, Veil Piercer
20%inclusion1 decks5 decks
19%synergy
Aegis of the Gods
20%inclusion1 decks5 decks
19%synergy
Instants
Swords to Plowshares
60%inclusion3 decks5 decks
-8%synergy
Thirst for Meaning
40%inclusion2 decks5 decks
38%synergy
Path to Exile
40%inclusion2 decks5 decks
-2%synergy
Hagra Mauling
20%inclusion1 decks5 decks
19%synergy
Fell the Profane
20%inclusion1 decks5 decks
11%synergy
Dovin's Veto
20%inclusion1 decks5 decks
-5%synergy
Thirst for Discovery
20%inclusion1 decks5 decks
19%synergy
Valorous Stance
20%inclusion1 decks5 decks
20%synergy
An Offer You Can't Refuse
20%inclusion1 decks5 decks
-6%synergy
Negate
20%inclusion1 decks5 decks
3%synergy
Dawn's Truce
20%inclusion1 decks5 decks
16%synergy
Flare of Fortitude
20%inclusion1 decks5 decks
18%synergy
Forbid
20%inclusion1 decks5 decks
20%synergy
Void Rend
20%inclusion1 decks5 decks
-13%synergy
Spellgyre
20%inclusion1 decks5 decks
20%synergy
Swan Song
20%inclusion1 decks5 decks
1%synergy
Unwanted Remake
20%inclusion1 decks5 decks
19%synergy
Dawn Charm
20%inclusion1 decks5 decks
19%synergy
Arcane Denial
20%inclusion1 decks5 decks
0%synergy
Get Out
20%inclusion1 decks5 decks
20%synergy
Lazotep Plating
20%inclusion1 decks5 decks
19%synergy
Counterspell
20%inclusion1 decks5 decks
-21%synergy
Drown in Dreams
20%inclusion1 decks5 decks
20%synergy
Karametra's Blessing
20%inclusion1 decks5 decks
20%synergy
Inkshield
20%inclusion1 decks5 decks
11%synergy
Don't Make a Sound
20%inclusion1 decks5 decks
19%synergy
Generous Gift
20%inclusion1 decks5 decks
5%synergy
Withering Torment
20%inclusion1 decks5 decks
18%synergy
Sorceries
Supreme Verdict
20%inclusion1 decks5 decks
5%synergy
Strategic Planning
20%inclusion1 decks5 decks
20%synergy
Windfall
20%inclusion1 decks5 decks
6%synergy
Lively Dirge
20%inclusion1 decks5 decks
19%synergy
Resurgent Belief
20%inclusion1 decks5 decks
18%synergy
Unmarked Grave
20%inclusion1 decks5 decks
19%synergy
Fractured Identity
20%inclusion1 decks5 decks
19%synergy
Time Wipe
20%inclusion1 decks5 decks
13%synergy
Glimpse the Unthinkable
20%inclusion1 decks5 decks
20%synergy
Idyllic Tutor
20%inclusion1 decks5 decks
16%synergy
Cleansing Meditation
20%inclusion1 decks5 decks
20%synergy
Demonic Counsel
20%inclusion1 decks5 decks
19%synergy
Damn
20%inclusion1 decks5 decks
0%synergy
Extinguish All Hope
20%inclusion1 decks5 decks
18%synergy
Stargaze
20%inclusion1 decks5 decks
20%synergy
Redress Fate
20%inclusion1 decks5 decks
14%synergy
Solve the Equation
20%inclusion1 decks5 decks
19%synergy
Dance of the Manse
20%inclusion1 decks5 decks
16%synergy
Utility Artifacts
Wayfarer's Bauble
40%inclusion2 decks5 decks
32%synergy
Mesmeric Orb
20%inclusion1 decks5 decks
19%synergy
Cloud Key
20%inclusion1 decks5 decks
17%synergy
Crucible of Worlds
20%inclusion1 decks5 decks
19%synergy
Panharmonicon
20%inclusion1 decks5 decks
17%synergy
Palantír of Orthanc
20%inclusion1 decks5 decks
19%synergy
Enchantments
Darksteel Mutation
60%inclusion3 decks5 decks
54%synergy
Daybreak Coronet
60%inclusion3 decks5 decks
59%synergy
Mantle of the Ancients
60%inclusion3 decks5 decks
57%synergy
Mystic Remora
60%inclusion3 decks5 decks
39%synergy
Amphibian Downpour
60%inclusion3 decks5 decks
55%synergy
Sage's Reverie
60%inclusion3 decks5 decks
58%synergy
Animate Dead
60%inclusion3 decks5 decks
50%synergy
Dress Down
60%inclusion3 decks5 decks
57%synergy
Secret Arcade // Dusty Parlor
60%inclusion3 decks5 decks
55%synergy
Aqueous Form
40%inclusion2 decks5 decks
37%synergy
Unable to Scream
40%inclusion2 decks5 decks
39%synergy
Shardmage's Rescue
40%inclusion2 decks5 decks
40%synergy
Chains of Custody
40%inclusion2 decks5 decks
39%synergy
Necromancy
40%inclusion2 decks5 decks
35%synergy
Timely Ward
40%inclusion2 decks5 decks
35%synergy
Restricted Office // Lecture Hall
40%inclusion2 decks5 decks
38%synergy
Auramancer's Guise
40%inclusion2 decks5 decks
39%synergy
Sheltered by Ghosts
40%inclusion2 decks5 decks
37%synergy
Nowhere to Run
40%inclusion2 decks5 decks
39%synergy
Combat Research
40%inclusion2 decks5 decks
37%synergy
Teval's Judgment
25%inclusion1 decks4 decks
24%synergy
Endless Evil
20%inclusion1 decks5 decks
20%synergy
Blessing of the Nephilim
20%inclusion1 decks5 decks
20%synergy
Staggering Insight
20%inclusion1 decks5 decks
18%synergy
Cloak of Mists
20%inclusion1 decks5 decks
20%synergy
Dance of the Dead
20%inclusion1 decks5 decks
18%synergy
Edge of the Divinity
20%inclusion1 decks5 decks
20%synergy
Grasp of Fate
20%inclusion1 decks5 decks
14%synergy
Cacophony Unleashed
20%inclusion1 decks5 decks
18%synergy
Curiosity
20%inclusion1 decks5 decks
12%synergy
Monastery Siege
20%inclusion1 decks5 decks
19%synergy
Ghoulish Impetus
20%inclusion1 decks5 decks
19%synergy
Gift of Immortality
20%inclusion1 decks5 decks
18%synergy
Pariah
20%inclusion1 decks5 decks
20%synergy
Noble Heritage
20%inclusion1 decks5 decks
20%synergy
Prison Term
20%inclusion1 decks5 decks
20%synergy
Hyena Umbra
20%inclusion1 decks5 decks
19%synergy
Eldrazi Conscription
20%inclusion1 decks5 decks
18%synergy
Glasswing Grace
20%inclusion1 decks5 decks
17%synergy
Sigil of the Empty Throne
20%inclusion1 decks5 decks
14%synergy
Flickering Ward
20%inclusion1 decks5 decks
20%synergy
Compulsion
20%inclusion1 decks5 decks
20%synergy
Omen of the Sea
20%inclusion1 decks5 decks
19%synergy
Utter Insignificance
20%inclusion1 decks5 decks
19%synergy
Nerd Rage
20%inclusion1 decks5 decks
18%synergy
Out of the Tombs
20%inclusion1 decks5 decks
20%synergy
Chronic Flooding
20%inclusion1 decks5 decks
20%synergy
Eel Umbra
20%inclusion1 decks5 decks
19%synergy
Brave the Sands
20%inclusion1 decks5 decks
19%synergy
Soul Snare
20%inclusion1 decks5 decks
20%synergy
Utility Lands
Bojuka Bog
40%inclusion2 decks5 decks
13%synergy
Hall of Heliod's Generosity
20%inclusion1 decks5 decks
7%synergy
Nephalia Drownyard
20%inclusion1 decks5 decks
19%synergy
Hidden Cataract
20%inclusion1 decks5 decks
20%synergy
Cephalid Coliseum
20%inclusion1 decks5 decks
16%synergy
Hidden Courtyard
20%inclusion1 decks5 decks
20%synergy
Rogue's Passage
20%inclusion1 decks5 decks
11%synergy
Hidden Necropolis
20%inclusion1 decks5 decks
20%synergy
Mana Artifacts
Arcane Signet
100%inclusion5 decks5 decks
12%synergy
Sol Ring
80%inclusion4 decks5 decks
-10%synergy
Talisman of Progress
40%inclusion2 decks5 decks
-3%synergy
Talisman of Dominance
40%inclusion2 decks5 decks
-9%synergy
Talisman of Hierarchy
40%inclusion2 decks5 decks
-3%synergy
Orzhov Signet
40%inclusion2 decks5 decks
5%synergy
Azorius Signet
40%inclusion2 decks5 decks
7%synergy
Chromatic Lantern
20%inclusion1 decks5 decks
6%synergy
Fellwar Stone
20%inclusion1 decks5 decks
-14%synergy
Thran Dynamo
20%inclusion1 decks5 decks
16%synergy
Mind Stone
20%inclusion1 decks5 decks
7%synergy
Lands
Command Tower
100%inclusion5 decks5 decks
8%synergy
Swamp
80%inclusion4 decks5 decks
-11%synergy
Arcane Sanctum
80%inclusion4 decks5 decks
25%synergy
Underground River
80%inclusion4 decks5 decks
48%synergy
Island
80%inclusion4 decks5 decks
-13%synergy
Plains
80%inclusion4 decks5 decks
-11%synergy
Adarkar Wastes
80%inclusion4 decks5 decks
49%synergy
Caves of Koilos
60%inclusion3 decks5 decks
25%synergy
Prairie Stream
60%inclusion3 decks5 decks
19%synergy
Isolated Chapel
60%inclusion3 decks5 decks
22%synergy
Drowned Catacomb
60%inclusion3 decks5 decks
25%synergy
Vault of Champions
60%inclusion3 decks5 decks
27%synergy
Glacial Fortress
40%inclusion2 decks5 decks
0%synergy
Clearwater Pathway
40%inclusion2 decks5 decks
33%synergy
Azorius Chancery
40%inclusion2 decks5 decks
25%synergy
Shadowy Backstreet
40%inclusion2 decks5 decks
28%synergy
Contaminated Landscape
40%inclusion2 decks5 decks
25%synergy
Valgavoth's Lair
40%inclusion2 decks5 decks
37%synergy
Sea of Clouds
40%inclusion2 decks5 decks
4%synergy
Esper Panorama
40%inclusion2 decks5 decks
36%synergy
Raffine's Tower
40%inclusion2 decks5 decks
-1%synergy
Meticulous Archive
40%inclusion2 decks5 decks
26%synergy
Sunken Hollow
40%inclusion2 decks5 decks
0%synergy
Obscura Storefront
40%inclusion2 decks5 decks
29%synergy
Hagra Mauling
20%inclusion1 decks5 decks
19%synergy
Fell the Profane
20%inclusion1 decks5 decks
11%synergy
Undercity Sewers
20%inclusion1 decks5 decks
6%synergy
Terramorphic Expanse
20%inclusion1 decks5 decks
3%synergy
Brightclimb Pathway
20%inclusion1 decks5 decks
13%synergy
Exotic Orchard
20%inclusion1 decks5 decks
-38%synergy
Temple of Deceit
20%inclusion1 decks5 decks
2%synergy
Dimir Aqueduct
20%inclusion1 decks5 decks
6%synergy
Glasswing Grace
20%inclusion1 decks5 decks
17%synergy
Fetid Heath
20%inclusion1 decks5 decks
9%synergy
Tainted Field
20%inclusion1 decks5 decks
13%synergy
Hengegate Pathway
20%inclusion1 decks5 decks
14%synergy
Darkwater Catacombs
20%inclusion1 decks5 decks
6%synergy
Snow-Covered Island
20%inclusion1 decks5 decks
17%synergy
Boggart Trawler
20%inclusion1 decks5 decks
17%synergy
Godless Shrine
20%inclusion1 decks5 decks
-30%synergy
Snowfield Sinkhole
20%inclusion1 decks5 decks
19%synergy
Cavern of Souls
20%inclusion1 decks5 decks
13%synergy
Temple of Enlightenment
20%inclusion1 decks5 decks
3%synergy
Maestros Theater
20%inclusion1 decks5 decks
20%synergy
Evolving Wilds
20%inclusion1 decks5 decks
-5%synergy
Orzhov Basilica
20%inclusion1 decks5 decks
4%synergy
Snow-Covered Plains
20%inclusion1 decks5 decks
17%synergy
Brokers Hideout
20%inclusion1 decks5 decks
20%synergy
Morphic Pool
20%inclusion1 decks5 decks
-14%synergy
Choked Estuary
20%inclusion1 decks5 decks
4%synergy
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