The Master of Keys (Commander) - 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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Wan Shi Tong, Librarian
14%inclusion1 decks7 decks
9%synergy
High Synergy Cards
Mesa Enchantress
76%inclusion67 decks88 decks
67%synergy
Inquisitive Glimmer
66%inclusion58 decks88 decks
58%synergy
Ripples of Undeath
60%inclusion53 decks88 decks
57%synergy
Entity Tracker
64%inclusion56 decks88 decks
57%synergy
Ethereal Armor
59%inclusion52 decks88 decks
54%synergy
Animate Dead
58%inclusion51 decks88 decks
48%synergy
All That Glitters
57%inclusion50 decks88 decks
48%synergy
Sage's Reverie
50%inclusion44 decks88 decks
48%synergy
Amphibian Downpour
52%inclusion46 decks88 decks
48%synergy
Mantle of the Ancients
50%inclusion44 decks88 decks
47%synergy
Top Cards
Starfield Mystic
53%inclusion47 decks88 decks
47%synergy
Swords to Plowshares
53%inclusion47 decks88 decks
-15%synergy
Mystic Remora
49%inclusion43 decks88 decks
28%synergy
Doomwake Giant
49%inclusion43 decks88 decks
43%synergy
Gravebreaker Lamia
45%inclusion40 decks88 decks
44%synergy
Ondu Spiritdancer
44%inclusion39 decks88 decks
38%synergy
Darksteel Mutation
43%inclusion38 decks88 decks
37%synergy
Victor, Valgavoth's Seneschal
43%inclusion38 decks88 decks
41%synergy
Sheltered by Ghosts
42%inclusion37 decks88 decks
39%synergy
Timely Ward
41%inclusion36 decks88 decks
36%synergy
Game Changers
Smothering Tithe
40%inclusion35 decks88 decks
8%synergy
Rhystic Study
36%inclusion32 decks88 decks
4%synergy
Enlightened Tutor
19%inclusion17 decks88 decks
-1%synergy
Fierce Guardianship
13%inclusion11 decks88 decks
-8%synergy
Cyclonic Rift
13%inclusion11 decks88 decks
-12%synergy
Teferi's Protection
11%inclusion10 decks88 decks
-6%synergy
Demonic Tutor
11%inclusion10 decks88 decks
-10%synergy
Thassa's Oracle
10%inclusion9 decks88 decks
0%synergy
Ancient Tomb
10%inclusion9 decks88 decks
-3%synergy
Mana Vault
10%inclusion9 decks88 decks
1%synergy
Creatures
Pearl-Ear, Imperial Advisor
40%inclusion35 decks88 decks
38%synergy
Sram, Senior Edificer
39%inclusion34 decks88 decks
34%synergy
Demon of Fate's Design
38%inclusion33 decks88 decks
32%synergy
Kor Spiritdancer
36%inclusion32 decks88 decks
35%synergy
Scrabbling Skullcrab
34%inclusion30 decks88 decks
33%synergy
Zur the Enchanter
34%inclusion30 decks88 decks
29%synergy
Overlord of the Balemurk
28%inclusion25 decks88 decks
26%synergy
Overlord of the Floodpits
27%inclusion24 decks88 decks
24%synergy
Fear of Sleep Paralysis
27%inclusion24 decks88 decks
22%synergy
Arna Kennerüd, Skycaptain
26%inclusion23 decks88 decks
24%synergy
Fear of Impostors
24%inclusion21 decks88 decks
22%synergy
Eriette of the Charmed Apple
24%inclusion21 decks88 decks
22%synergy
Esper Sentinel
20%inclusion18 decks88 decks
-7%synergy
Eidolon of Countless Battles
19%inclusion17 decks88 decks
18%synergy
Moon-Blessed Cleric
19%inclusion17 decks88 decks
15%synergy
Light-Paws, Emperor's Voice
18%inclusion16 decks88 decks
17%synergy
Archon of Sun's Grace
18%inclusion16 decks88 decks
13%synergy
Grim Guardian
17%inclusion15 decks88 decks
14%synergy
Zur, Eternal Schemer
17%inclusion15 decks88 decks
14%synergy
Bruna, Light of Alabaster
17%inclusion15 decks88 decks
16%synergy
Hateful Eidolon
16%inclusion14 decks88 decks
15%synergy
Heliod, the Radiant Dawn
16%inclusion14 decks88 decks
12%synergy
Killian, Ink Duelist
16%inclusion14 decks88 decks
14%synergy
Enduring Curiosity
15%inclusion13 decks88 decks
7%synergy
Transcendent Envoy
15%inclusion13 decks88 decks
13%synergy
Heliod's Pilgrim
14%inclusion12 decks88 decks
13%synergy
Alseid of Life's Bounty
14%inclusion12 decks88 decks
12%synergy
Sage of Mysteries
13%inclusion11 decks88 decks
12%synergy
Silent Hallcreeper
13%inclusion11 decks88 decks
8%synergy
Nashi, Searcher in the Dark
13%inclusion11 decks88 decks
12%synergy
Umbra Mystic
13%inclusion11 decks88 decks
12%synergy
Ghostly Dancers
13%inclusion11 decks88 decks
10%synergy
Witch Enchanter
10%inclusion9 decks88 decks
3%synergy
Danitha Capashen, Paragon
10%inclusion9 decks88 decks
6%synergy
Aminatou, Veil Piercer
10%inclusion9 decks88 decks
9%synergy
Grand Abolisher
10%inclusion9 decks88 decks
-4%synergy
Mindwrack Harpy
10%inclusion9 decks88 decks
10%synergy
Sun Titan
9.1%inclusion8 decks88 decks
0%synergy
Ancient Cellarspawn
9.1%inclusion8 decks88 decks
6%synergy
Abdel Adrian, Gorion's Ward
9.1%inclusion8 decks88 decks
7%synergy
Lotho, Corrupt Shirriff
8.0%inclusion7 decks88 decks
-9%synergy
Katilda, Dawnhart Martyr
8.0%inclusion7 decks88 decks
8%synergy
Sovereigns of Lost Alara
8.0%inclusion7 decks88 decks
8%synergy
Spirited Companion
8.0%inclusion7 decks88 decks
6%synergy
Balemurk Leech
8.0%inclusion7 decks88 decks
7%synergy
Fang, Fearless l'Cie
7.1%inclusion1 decks14 decks
7%synergy
Summon: Ixion
7.1%inclusion1 decks14 decks
7%synergy
Tataru Taru
7.1%inclusion1 decks14 decks
-1%synergy
Summon: Knights of Round
7.1%inclusion1 decks14 decks
4%synergy
Stenn, Paranoid Partisan
6.8%inclusion6 decks88 decks
5%synergy
Instants
Counterspell
30%inclusion26 decks88 decks
-12%synergy
Path to Exile
30%inclusion26 decks88 decks
-12%synergy
Otherworldly Gaze
24%inclusion21 decks88 decks
22%synergy
Void Rend
19%inclusion17 decks88 decks
-14%synergy
Frantic Search
18%inclusion16 decks88 decks
1%synergy
Dark Ritual
18%inclusion16 decks88 decks
-1%synergy
Thirst for Meaning
18%inclusion16 decks88 decks
17%synergy
Arcane Denial
18%inclusion16 decks88 decks
-2%synergy
Fell the Profane
17%inclusion15 decks88 decks
8%synergy
Entomb
17%inclusion15 decks88 decks
10%synergy
Sink into Stupor
17%inclusion15 decks88 decks
4%synergy
An Offer You Can't Refuse
16%inclusion14 decks88 decks
-11%synergy
Dovin's Veto
15%inclusion13 decks88 decks
-10%synergy
Swan Song
14%inclusion12 decks88 decks
-6%synergy
Anguished Unmaking
11%inclusion10 decks88 decks
-13%synergy
Brainstorm
9.1%inclusion8 decks88 decks
-8%synergy
Inkshield
9.1%inclusion8 decks88 decks
0%synergy
Vampiric Tutor
9.1%inclusion8 decks88 decks
-9%synergy
Generous Gift
9.1%inclusion8 decks88 decks
-6%synergy
Tainted Pact
8.0%inclusion7 decks88 decks
1%synergy
Dawn's Truce
8.0%inclusion7 decks88 decks
3%synergy
Mana Drain
8.0%inclusion7 decks88 decks
-9%synergy
Slip Out the Back
8.0%inclusion7 decks88 decks
7%synergy
Silence
8.0%inclusion7 decks88 decks
-2%synergy
Mystical Tutor
8.0%inclusion7 decks88 decks
-4%synergy
Overkill
7.1%inclusion1 decks14 decks
5%synergy
Intuition
6.8%inclusion6 decks88 decks
5%synergy
Fact or Fiction
6.8%inclusion6 decks88 decks
3%synergy
Thought Scour
6.8%inclusion6 decks88 decks
6%synergy
Force of Will
6.8%inclusion6 decks88 decks
-6%synergy
Demonic Consultation
6.8%inclusion6 decks88 decks
-2%synergy
Force of Negation
6.8%inclusion6 decks88 decks
-5%synergy
Borne Upon a Wind
6.8%inclusion6 decks88 decks
2%synergy
Mental Misstep
5.7%inclusion5 decks88 decks
-1%synergy
Negate
5.7%inclusion5 decks88 decks
-11%synergy
Consider
5.7%inclusion5 decks88 decks
3%synergy
Cabal Ritual
5.7%inclusion5 decks88 decks
2%synergy
Flusterstorm
5.7%inclusion5 decks88 decks
-3%synergy
Faithful Mending
5.7%inclusion5 decks88 decks
2%synergy
Sorceries
Sevinne's Reclamation
32%inclusion28 decks88 decks
23%synergy
Redress Fate
28%inclusion25 decks88 decks
22%synergy
Winds of Rath
23%inclusion20 decks88 decks
20%synergy
Windfall
20%inclusion18 decks88 decks
7%synergy
Extinguish All Hope
18%inclusion16 decks88 decks
17%synergy
Resurgent Belief
16%inclusion14 decks88 decks
14%synergy
Retether
16%inclusion14 decks88 decks
15%synergy
Damn
14%inclusion12 decks88 decks
-7%synergy
Open the Armory
13%inclusion11 decks88 decks
9%synergy
Idyllic Tutor
10%inclusion9 decks88 decks
6%synergy
Ponder
9.1%inclusion8 decks88 decks
0%synergy
Supreme Verdict
9.1%inclusion8 decks88 decks
-6%synergy
Replenish
9.1%inclusion8 decks88 decks
7%synergy
Singularity Rupture
8.3%inclusion1 decks12 decks
6%synergy
Time Wipe
8.0%inclusion7 decks88 decks
1%synergy
Toxic Deluge
8.0%inclusion7 decks88 decks
-12%synergy
Austere Command
6.8%inclusion6 decks88 decks
-2%synergy
Unmarked Grave
6.8%inclusion6 decks88 decks
5%synergy
Read the Bones
6.8%inclusion6 decks88 decks
2%synergy
Dance of the Manse
6.8%inclusion6 decks88 decks
3%synergy
Blasphemous Edict
5.9%inclusion3 decks51 decks
3%synergy
Glimpse the Unthinkable
5.7%inclusion5 decks88 decks
5%synergy
Cleansing Meditation
5.7%inclusion5 decks88 decks
5%synergy
Diresight
5.7%inclusion5 decks88 decks
5%synergy
Traumatize
5.7%inclusion5 decks88 decks
5%synergy
Utility Artifacts
Swiftfoot Boots
17%inclusion15 decks88 decks
-7%synergy
Mesmeric Orb
16%inclusion14 decks88 decks
15%synergy
Wayfarer's Bauble
11%inclusion10 decks88 decks
3%synergy
Perpetual Timepiece
8.0%inclusion7 decks88 decks
8%synergy
The One Ring
8.0%inclusion7 decks88 decks
-6%synergy
Wishclaw Talisman
8.0%inclusion7 decks88 decks
0%synergy
Cloud Key
5.7%inclusion5 decks88 decks
2%synergy
Helm of the Gods
5.7%inclusion5 decks88 decks
5%synergy
Semblance Anvil
5.7%inclusion5 decks88 decks
5%synergy
Enchantments
Dress Down
40%inclusion35 decks88 decks
37%synergy
Steel of the Godhead
38%inclusion33 decks88 decks
34%synergy
Daybreak Coronet
36%inclusion32 decks88 decks
35%synergy
Mirrormade
36%inclusion32 decks88 decks
27%synergy
Sphere of Safety
36%inclusion32 decks88 decks
27%synergy
Grasp of Fate
35%inclusion31 decks88 decks
29%synergy
Glasswing Grace
35%inclusion31 decks88 decks
32%synergy
Secret Arcade // Dusty Parlor
35%inclusion31 decks88 decks
30%synergy
Sigil of the Empty Throne
34%inclusion30 decks88 decks
28%synergy
Cemetery Tampering
34%inclusion30 decks88 decks
33%synergy
Necromancy
32%inclusion28 decks88 decks
27%synergy
Combat Research
31%inclusion27 decks88 decks
28%synergy
Aqueous Form
28%inclusion25 decks88 decks
25%synergy
Imprisoned in the Moon
28%inclusion25 decks88 decks
22%synergy
Propaganda
28%inclusion25 decks88 decks
2%synergy
Eldrazi Conscription
27%inclusion24 decks88 decks
26%synergy
Estrid's Invocation
26%inclusion23 decks88 decks
22%synergy
Auramancer's Guise
24%inclusion21 decks88 decks
23%synergy
Spirit Mantle
23%inclusion20 decks88 decks
22%synergy
Copy Enchantment
23%inclusion20 decks88 decks
18%synergy
Seal of Cleansing
23%inclusion20 decks88 decks
21%synergy
Ghostly Prison
23%inclusion20 decks88 decks
1%synergy
Battle Mastery
22%inclusion19 decks88 decks
20%synergy
Kaya's Ghostform
22%inclusion19 decks88 decks
19%synergy
Staggering Insight
20%inclusion18 decks88 decks
18%synergy
Cacophony Unleashed
20%inclusion18 decks88 decks
19%synergy
Songbirds' Blessing
19%inclusion17 decks88 decks
18%synergy
Starfield of Nyx
19%inclusion17 decks88 decks
15%synergy
Eaten by Piranhas
19%inclusion17 decks88 decks
18%synergy
Unable to Scream
18%inclusion16 decks88 decks
17%synergy
Black Market Connections
17%inclusion15 decks88 decks
3%synergy
Hyena Umbra
16%inclusion14 decks88 decks
15%synergy
Blind Obedience
16%inclusion14 decks88 decks
4%synergy
The Tale of Tamiyo
16%inclusion14 decks88 decks
15%synergy
Monologue Tax
16%inclusion14 decks88 decks
10%synergy
Teval's Judgment
15%inclusion3 decks20 decks
14%synergy
Stillness in Motion
15%inclusion3 decks20 decks
15%synergy
Dance of the Dead
15%inclusion13 decks88 decks
13%synergy
Eel Umbra
15%inclusion13 decks88 decks
14%synergy
Shark Typhoon
15%inclusion13 decks88 decks
9%synergy
Idolized
15%inclusion13 decks88 decks
14%synergy
Curator's Ward
15%inclusion13 decks88 decks
12%synergy
Dog Umbra
15%inclusion13 decks88 decks
14%synergy
Phyrexian Arena
15%inclusion13 decks88 decks
1%synergy
Chains of Custody
14%inclusion12 decks88 decks
13%synergy
Secrets of the Dead
14%inclusion12 decks88 decks
13%synergy
Defiled Crypt // Cadaver Lab
13%inclusion11 decks85 decks
12%synergy
The Meathook Massacre
13%inclusion11 decks88 decks
9%synergy
Curiosity
13%inclusion11 decks88 decks
5%synergy
Court of Cunning
13%inclusion11 decks88 decks
11%synergy
Battles
Invasion of Theros
17%inclusion15 decks88 decks
15%synergy
Planeswalkers
Teferi, Time Raveler
5.7%inclusion5 decks88 decks
-3%synergy
Utility Lands
Hall of Heliod's Generosity
57%inclusion50 decks88 decks
44%synergy
Bojuka Bog
39%inclusion34 decks88 decks
11%synergy
Otawara, Soaring City
18%inclusion16 decks88 decks
-1%synergy
Rogue's Passage
14%inclusion12 decks88 decks
4%synergy
Halimar Depths
10%inclusion9 decks88 decks
5%synergy
Serra's Sanctum
9.1%inclusion8 decks88 decks
7%synergy
Susur Secundi, Void Altar
8.3%inclusion1 decks12 decks
7%synergy
Ishgard, the Holy See
7.1%inclusion1 decks14 decks
4%synergy
Urza's Saga
6.8%inclusion6 decks88 decks
-5%synergy
Takenuma, Abandoned Mire
6.8%inclusion6 decks88 decks
0%synergy
Reliquary Tower
6.8%inclusion6 decks88 decks
-27%synergy
Cephalid Coliseum
6.8%inclusion6 decks88 decks
3%synergy
Hall of the Bandit Lord
5.7%inclusion5 decks88 decks
5%synergy
Nephalia Drownyard
5.7%inclusion5 decks88 decks
5%synergy
Urborg, Tomb of Yawgmoth
5.7%inclusion5 decks88 decks
-7%synergy
Mana Artifacts
Arcane Signet
92%inclusion81 decks88 decks
4%synergy
Sol Ring
90%inclusion79 decks88 decks
0%synergy
Talisman of Progress
58%inclusion51 decks88 decks
15%synergy
Talisman of Dominance
53%inclusion47 decks88 decks
4%synergy
Talisman of Hierarchy
53%inclusion47 decks88 decks
10%synergy
Azorius Signet
43%inclusion38 decks88 decks
11%synergy
Orzhov Signet
40%inclusion35 decks88 decks
5%synergy
Fellwar Stone
33%inclusion29 decks88 decks
-1%synergy
Dimir Signet
27%inclusion24 decks88 decks
-5%synergy
Commander's Sphere
15%inclusion13 decks88 decks
-4%synergy
Mind Stone
13%inclusion11 decks88 decks
0%synergy
Chromatic Lantern
9.1%inclusion8 decks88 decks
-4%synergy
Lotus Petal
8.0%inclusion7 decks88 decks
-3%synergy
Mox Opal
6.8%inclusion6 decks88 decks
-2%synergy
Chrome Mox
6.8%inclusion6 decks88 decks
-3%synergy
Mox Diamond
6.8%inclusion6 decks88 decks
0%synergy
Thran Dynamo
5.7%inclusion5 decks88 decks
2%synergy
Lion's Eye Diamond
5.7%inclusion5 decks88 decks
4%synergy
Lands
Command Tower
93%inclusion82 decks88 decks
1%synergy
Island
92%inclusion81 decks88 decks
-1%synergy
Plains
91%inclusion80 decks88 decks
-1%synergy
Swamp
88%inclusion77 decks88 decks
-4%synergy
Adarkar Wastes
58%inclusion51 decks88 decks
27%synergy
Arcane Sanctum
57%inclusion50 decks88 decks
2%synergy
Caves of Koilos
50%inclusion44 decks88 decks
15%synergy
Hallowed Fountain
50%inclusion44 decks88 decks
1%synergy
Exotic Orchard
48%inclusion42 decks88 decks
-11%synergy
Godless Shrine
48%inclusion42 decks88 decks
-2%synergy
Underground River
47%inclusion41 decks88 decks
14%synergy
Watery Grave
47%inclusion41 decks88 decks
-3%synergy
Vault of Champions
42%inclusion37 decks88 decks
9%synergy
Flooded Strand
41%inclusion36 decks88 decks
3%synergy
Raffine's Tower
40%inclusion35 decks88 decks
-1%synergy
Sea of Clouds
36%inclusion32 decks88 decks
1%synergy
Isolated Chapel
36%inclusion32 decks88 decks
-2%synergy
Glacial Fortress
35%inclusion31 decks88 decks
-5%synergy
Glasswing Grace
35%inclusion31 decks88 decks
32%synergy
Valgavoth's Lair
34%inclusion30 decks88 decks
31%synergy
Meticulous Archive
33%inclusion29 decks88 decks
19%synergy
Polluted Delta
33%inclusion29 decks88 decks
-4%synergy
Drowned Catacomb
32%inclusion28 decks88 decks
-4%synergy
Shadowy Backstreet
31%inclusion27 decks88 decks
18%synergy
Evolving Wilds
31%inclusion27 decks88 decks
5%synergy
Undercity Sewers
30%inclusion26 decks88 decks
15%synergy
Terramorphic Expanse
28%inclusion25 decks88 decks
12%synergy
Prairie Stream
28%inclusion25 decks88 decks
-12%synergy
Marsh Flats
28%inclusion25 decks88 decks
-8%synergy
Morphic Pool
27%inclusion24 decks88 decks
-7%synergy
Azorius Chancery
26%inclusion23 decks88 decks
12%synergy
Obscura Storefront
26%inclusion23 decks88 decks
16%synergy
Contaminated Landscape
25%inclusion22 decks88 decks
10%synergy
Orzhov Basilica
24%inclusion21 decks88 decks
8%synergy
Dimir Aqueduct
23%inclusion20 decks88 decks
9%synergy
Temple of Deceit
22%inclusion19 decks88 decks
3%synergy
Sunken Hollow
22%inclusion19 decks88 decks
-18%synergy
Tainted Isle
20%inclusion18 decks88 decks
14%synergy
Tainted Field
20%inclusion18 decks88 decks
13%synergy
Deserted Beach
20%inclusion18 decks88 decks
0%synergy
Temple of Enlightenment
19%inclusion17 decks88 decks
2%synergy
Temple of Silence
19%inclusion17 decks88 decks
0%synergy
Fell the Profane
17%inclusion15 decks88 decks
8%synergy
Ash Barrens
17%inclusion15 decks88 decks
6%synergy
Sink into Stupor
17%inclusion15 decks88 decks
4%synergy
Shipwreck Marsh
16%inclusion14 decks88 decks
-5%synergy
Gloomlake Verge
13%inclusion11 decks88 decks
1%synergy
Mystic Gate
13%inclusion11 decks88 decks
7%synergy
Tundra
11%inclusion10 decks88 decks
-5%synergy
Arid Mesa
11%inclusion10 decks88 decks
1%synergy
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