The Master of Keys (Commander) - Voltron

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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Sorceries
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Enchantments
Utility Lands
Mana Artifacts
Lands
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Ethereal Armor
76%inclusion19 decks25 decks
71%synergy
All That Glitters
72%inclusion18 decks25 decks
63%synergy
Starfield Mystic
68%inclusion17 decks25 decks
61%synergy
Mesa Enchantress
68%inclusion17 decks25 decks
59%synergy
Inquisitive Glimmer
64%inclusion16 decks25 decks
56%synergy
Otherworldly Gaze
56%inclusion14 decks25 decks
54%synergy
Ripples of Undeath
52%inclusion13 decks25 decks
49%synergy
Entity Tracker
52%inclusion13 decks25 decks
46%synergy
Mantle of the Ancients
48%inclusion12 decks25 decks
45%synergy
Doomwake Giant
48%inclusion12 decks25 decks
42%synergy
Top Cards
Mystic Remora
52%inclusion13 decks25 decks
31%synergy
Sphere of Safety
48%inclusion12 decks25 decks
39%synergy
Swords to Plowshares
44%inclusion11 decks25 decks
-24%synergy
Victor, Valgavoth's Seneschal
40%inclusion10 decks25 decks
38%synergy
Path to Exile
40%inclusion10 decks25 decks
-2%synergy
Ghostly Prison
40%inclusion10 decks25 decks
18%synergy
Daybreak Coronet
40%inclusion10 decks25 decks
39%synergy
Gravebreaker Lamia
40%inclusion10 decks25 decks
39%synergy
Demon of Fate's Design
40%inclusion10 decks25 decks
34%synergy
Mirrormade
40%inclusion10 decks25 decks
30%synergy
Game Changers
Smothering Tithe
40%inclusion10 decks25 decks
8%synergy
Rhystic Study
36%inclusion9 decks25 decks
4%synergy
Ancient Tomb
20%inclusion5 decks25 decks
7%synergy
Enlightened Tutor
20%inclusion5 decks25 decks
0%synergy
Cyclonic Rift
16%inclusion4 decks25 decks
-8%synergy
Demonic Tutor
12%inclusion3 decks25 decks
-9%synergy
Necropotence
12%inclusion3 decks25 decks
5%synergy
Fierce Guardianship
12%inclusion3 decks25 decks
-9%synergy
Teferi's Protection
8.0%inclusion2 decks25 decks
-9%synergy
Serra's Sanctum
8.0%inclusion2 decks25 decks
6%synergy
Creatures
Moon-Blessed Cleric
36%inclusion9 decks25 decks
31%synergy
Scrabbling Skullcrab
36%inclusion9 decks25 decks
35%synergy
Ondu Spiritdancer
36%inclusion9 decks25 decks
30%synergy
Zur the Enchanter
36%inclusion9 decks25 decks
31%synergy
Fear of Impostors
32%inclusion8 decks25 decks
30%synergy
Fear of Sleep Paralysis
32%inclusion8 decks25 decks
26%synergy
Zur, Eternal Schemer
24%inclusion6 decks25 decks
21%synergy
Grim Guardian
20%inclusion5 decks25 decks
17%synergy
Esper Sentinel
20%inclusion5 decks25 decks
-8%synergy
Skullsnap Nuisance
20%inclusion5 decks25 decks
20%synergy
Aminatou, Veil Piercer
20%inclusion5 decks25 decks
19%synergy
Heliod's Pilgrim
16%inclusion4 decks25 decks
15%synergy
Overlord of the Floodpits
16%inclusion4 decks25 decks
12%synergy
Sage of Mysteries
16%inclusion4 decks25 decks
16%synergy
Overlord of the Balemurk
16%inclusion4 decks25 decks
14%synergy
Creeping Peeper
16%inclusion4 decks25 decks
16%synergy
Nashi, Searcher in the Dark
16%inclusion4 decks25 decks
16%synergy
Heliod, the Radiant Dawn
16%inclusion4 decks25 decks
12%synergy
Abdel Adrian, Gorion's Ward
16%inclusion4 decks25 decks
14%synergy
Emet-Selch of the Third Seat
14%inclusion1 decks7 decks
5%synergy
Eidolon of Countless Battles
12%inclusion3 decks25 decks
11%synergy
Ghostly Dancers
12%inclusion3 decks25 decks
9%synergy
Displacer Kitten
12%inclusion3 decks25 decks
5%synergy
Eidolon of Rhetoric
12%inclusion3 decks25 decks
10%synergy
Silent Hallcreeper
12%inclusion3 decks25 decks
8%synergy
Sram, Senior Edificer
12%inclusion3 decks25 decks
7%synergy
Athreos, Shroud-Veiled
12%inclusion3 decks25 decks
8%synergy
Enduring Curiosity
12%inclusion3 decks25 decks
4%synergy
Sun Titan
12%inclusion3 decks25 decks
3%synergy
Auramancer
12%inclusion3 decks25 decks
9%synergy
Grand Abolisher
12%inclusion3 decks25 decks
-2%synergy
Killian, Ink Duelist
12%inclusion3 decks25 decks
10%synergy
Bruna, Light of Alabaster
12%inclusion3 decks25 decks
11%synergy
Mindwrack Harpy
12%inclusion3 decks25 decks
12%synergy
Dreadwing Scavenger
11%inclusion2 decks19 decks
10%synergy
Fear of Surveillance
8.0%inclusion2 decks25 decks
8%synergy
Optimistic Scavenger
8.0%inclusion2 decks25 decks
8%synergy
Witch Enchanter
8.0%inclusion2 decks25 decks
1%synergy
Lotho, Corrupt Shirriff
8.0%inclusion2 decks25 decks
-9%synergy
Kor Spiritdancer
8.0%inclusion2 decks25 decks
6%synergy
Lurrus of the Dream-Den
8.0%inclusion2 decks25 decks
6%synergy
Agent of Erebos
8.0%inclusion2 decks25 decks
8%synergy
Arna Kennerüd, Skycaptain
8.0%inclusion2 decks25 decks
6%synergy
Archon of Sun's Grace
8.0%inclusion2 decks25 decks
3%synergy
Katilda, Dawnhart Martyr
8.0%inclusion2 decks25 decks
8%synergy
Twinblade Geist
8.0%inclusion2 decks25 decks
8%synergy
Heliod, God of the Sun
8.0%inclusion2 decks25 decks
7%synergy
Nighthowler
8.0%inclusion2 decks25 decks
8%synergy
Soaring Lightbringer
8.0%inclusion2 decks25 decks
3%synergy
Hedron Crab
8.0%inclusion2 decks25 decks
7%synergy
Instants
Frantic Search
36%inclusion9 decks25 decks
19%synergy
Counterspell
36%inclusion9 decks25 decks
-5%synergy
Thirst for Meaning
32%inclusion8 decks25 decks
30%synergy
Dovin's Veto
20%inclusion5 decks25 decks
-5%synergy
Dark Ritual
20%inclusion5 decks25 decks
1%synergy
Swan Song
20%inclusion5 decks25 decks
1%synergy
Utter End
20%inclusion5 decks25 decks
13%synergy
Fell the Profane
16%inclusion4 decks25 decks
7%synergy
An Offer You Can't Refuse
16%inclusion4 decks25 decks
-11%synergy
Entomb
16%inclusion4 decks25 decks
9%synergy
Hagra Mauling
12%inclusion3 decks25 decks
11%synergy
Negate
12%inclusion3 decks25 decks
-5%synergy
Void Rend
12%inclusion3 decks25 decks
-22%synergy
Arcane Denial
12%inclusion3 decks25 decks
-8%synergy
Generous Gift
12%inclusion3 decks25 decks
-3%synergy
Don't Make a Sound
8.3%inclusion2 decks24 decks
8%synergy
Brainstorm
8.0%inclusion2 decks25 decks
-9%synergy
Consider
8.0%inclusion2 decks25 decks
6%synergy
Cabal Ritual
8.0%inclusion2 decks25 decks
5%synergy
Alchemist's Retrieval
8.0%inclusion2 decks25 decks
8%synergy
Disallow
8.0%inclusion2 decks25 decks
5%synergy
Jwari Disruption
8.0%inclusion2 decks25 decks
7%synergy
Force of Will
8.0%inclusion2 decks25 decks
-5%synergy
Force of Negation
8.0%inclusion2 decks25 decks
-4%synergy
Faithful Mending
8.0%inclusion2 decks25 decks
4%synergy
Sink into Stupor
8.0%inclusion2 decks25 decks
-5%synergy
Borne Upon a Wind
8.0%inclusion2 decks25 decks
3%synergy
Sejiri Shelter
8.0%inclusion2 decks25 decks
6%synergy
Inkshield
8.0%inclusion2 decks25 decks
-1%synergy
Vampiric Tutor
8.0%inclusion2 decks25 decks
-10%synergy
Pact of Negation
8.0%inclusion2 decks25 decks
0%synergy
Spectral Interference
6.3%inclusion1 decks16 decks
6%synergy
Uncharted Voyage
5.3%inclusion1 decks19 decks
5%synergy
Sorceries
Sevinne's Reclamation
36%inclusion9 decks25 decks
27%synergy
Redress Fate
32%inclusion8 decks25 decks
26%synergy
Glimpse the Unthinkable
20%inclusion5 decks25 decks
20%synergy
Extinguish All Hope
20%inclusion5 decks25 decks
18%synergy
Singularity Rupture
17%inclusion1 decks6 decks
14%synergy
Space-Time Anomaly
17%inclusion1 decks6 decks
15%synergy
Resurgent Belief
16%inclusion4 decks25 decks
14%synergy
Time Wipe
16%inclusion4 decks25 decks
9%synergy
Windfall
12%inclusion3 decks25 decks
-2%synergy
Idyllic Tutor
12%inclusion3 decks25 decks
8%synergy
Reanimate
12%inclusion3 decks25 decks
-4%synergy
Lively Dirge
8.0%inclusion2 decks25 decks
7%synergy
Emerge from the Cocoon
8.0%inclusion2 decks25 decks
8%synergy
Supreme Verdict
8.0%inclusion2 decks25 decks
-7%synergy
Open the Armory
8.0%inclusion2 decks25 decks
5%synergy
Damn
8.0%inclusion2 decks25 decks
-12%synergy
Retether
8.0%inclusion2 decks25 decks
7%synergy
Traumatize
8.0%inclusion2 decks25 decks
8%synergy
Utility Artifacts
Mesmeric Orb
24%inclusion6 decks25 decks
23%synergy
Swiftfoot Boots
20%inclusion5 decks25 decks
-4%synergy
Perpetual Timepiece
16%inclusion4 decks25 decks
16%synergy
Wayfarer's Bauble
12%inclusion3 decks25 decks
4%synergy
Elixir of Immortality
8.0%inclusion2 decks25 decks
6%synergy
Sensei's Divining Top
8.0%inclusion2 decks25 decks
-2%synergy
The Grim Captain's Locker
8.0%inclusion2 decks25 decks
8%synergy
The One Ring
8.0%inclusion2 decks25 decks
-6%synergy
Darksteel Plate
8.0%inclusion2 decks25 decks
7%synergy
Enchantments
Animate Dead
40%inclusion10 decks25 decks
30%synergy
Combat Research
40%inclusion10 decks25 decks
37%synergy
Aqueous Form
36%inclusion9 decks25 decks
33%synergy
Cemetery Tampering
36%inclusion9 decks25 decks
35%synergy
Timely Ward
36%inclusion9 decks25 decks
31%synergy
Steel of the Godhead
36%inclusion9 decks25 decks
33%synergy
Dress Down
36%inclusion9 decks25 decks
34%synergy
Sheltered by Ghosts
36%inclusion9 decks25 decks
33%synergy
Propaganda
36%inclusion9 decks25 decks
9%synergy
Sigil of the Empty Throne
32%inclusion8 decks25 decks
26%synergy
Necromancy
32%inclusion8 decks25 decks
27%synergy
Amphibian Downpour
32%inclusion8 decks25 decks
27%synergy
Monologue Tax
32%inclusion8 decks25 decks
26%synergy
Darksteel Mutation
28%inclusion7 decks25 decks
22%synergy
Sage's Reverie
28%inclusion7 decks25 decks
26%synergy
Secret Arcade // Dusty Parlor
28%inclusion7 decks25 decks
23%synergy
Stillness in Motion
27%inclusion3 decks11 decks
27%synergy
Grasp of Fate
24%inclusion6 decks25 decks
18%synergy
Extravagant Replication
24%inclusion6 decks25 decks
19%synergy
Authority of the Consuls
24%inclusion6 decks25 decks
13%synergy
Seal of Cleansing
24%inclusion6 decks25 decks
22%synergy
Black Market Connections
24%inclusion6 decks25 decks
10%synergy
One with the Multiverse
20%inclusion5 decks25 decks
15%synergy
Cacophony Unleashed
20%inclusion5 decks25 decks
18%synergy
Court of Cunning
20%inclusion5 decks25 decks
19%synergy
Imprisoned in the Moon
20%inclusion5 decks25 decks
13%synergy
Shardmage's Rescue
20%inclusion5 decks25 decks
20%synergy
Chains of Custody
20%inclusion5 decks25 decks
19%synergy
Blind Obedience
20%inclusion5 decks25 decks
8%synergy
Shark Typhoon
20%inclusion5 decks25 decks
14%synergy
Starfield of Nyx
20%inclusion5 decks25 decks
16%synergy
Curator's Ward
20%inclusion5 decks25 decks
17%synergy
Nowhere to Run
20%inclusion5 decks25 decks
19%synergy
Seal of Removal
20%inclusion5 decks25 decks
19%synergy
Teval's Judgment
18%inclusion2 decks11 decks
17%synergy
Tempest Technique
18%inclusion2 decks11 decks
18%synergy
Derelict Attic // Widow's Walk
17%inclusion4 decks24 decks
16%synergy
Curiosity
16%inclusion4 decks25 decks
8%synergy
Dance of the Dead
16%inclusion4 decks25 decks
14%synergy
Eldrazi Conscription
16%inclusion4 decks25 decks
14%synergy
Touch the Spirit Realm
16%inclusion4 decks25 decks
13%synergy
Copy Enchantment
16%inclusion4 decks25 decks
11%synergy
Idolized
16%inclusion4 decks25 decks
15%synergy
Auramancer's Guise
16%inclusion4 decks25 decks
15%synergy
Bottomless Pool // Locker Room
16%inclusion4 decks25 decks
14%synergy
Eaten by Piranhas
16%inclusion4 decks25 decks
15%synergy
Enchanted Evening
16%inclusion4 decks25 decks
14%synergy
Vanishing
16%inclusion4 decks25 decks
15%synergy
Solitary Confinement
16%inclusion4 decks25 decks
14%synergy
Greater Auramancy
16%inclusion4 decks25 decks
12%synergy
Utility Lands
Hall of Heliod's Generosity
40%inclusion10 decks25 decks
27%synergy
Bojuka Bog
24%inclusion6 decks25 decks
-3%synergy
Command Beacon
16%inclusion4 decks25 decks
13%synergy
Cephalid Coliseum
16%inclusion4 decks25 decks
12%synergy
Otawara, Soaring City
16%inclusion4 decks25 decks
-3%synergy
Ishgard, the Holy See
14%inclusion1 decks7 decks
11%synergy
Urza's Saga
12%inclusion3 decks25 decks
0%synergy
Reliquary Tower
12%inclusion3 decks25 decks
-22%synergy
Emergence Zone
8.0%inclusion2 decks25 decks
6%synergy
Tocasia's Dig Site
8.0%inclusion2 decks25 decks
8%synergy
Temple of the False God
8.0%inclusion2 decks25 decks
0%synergy
Rogue's Passage
8.0%inclusion2 decks25 decks
-1%synergy
Mana Artifacts
Arcane Signet
88%inclusion22 decks25 decks
0%synergy
Sol Ring
84%inclusion21 decks25 decks
-6%synergy
Talisman of Dominance
56%inclusion14 decks25 decks
7%synergy
Talisman of Progress
44%inclusion11 decks25 decks
1%synergy
Talisman of Hierarchy
44%inclusion11 decks25 decks
1%synergy
Azorius Signet
40%inclusion10 decks25 decks
8%synergy
Orzhov Signet
36%inclusion9 decks25 decks
2%synergy
Fellwar Stone
32%inclusion8 decks25 decks
-2%synergy
Mind Stone
28%inclusion7 decks25 decks
15%synergy
Dimir Signet
16%inclusion4 decks25 decks
-16%synergy
Chromatic Lantern
12%inclusion3 decks25 decks
-1%synergy
Mox Opal
8.0%inclusion2 decks25 decks
-1%synergy
Commander's Sphere
8.0%inclusion2 decks25 decks
-11%synergy
Lotus Petal
8.0%inclusion2 decks25 decks
-3%synergy
Mana Vault
8.0%inclusion2 decks25 decks
-1%synergy
Chrome Mox
8.0%inclusion2 decks25 decks
-2%synergy
Lands
Command Tower
96%inclusion24 decks25 decks
4%synergy
Swamp
88%inclusion22 decks25 decks
-3%synergy
Island
88%inclusion22 decks25 decks
-5%synergy
Plains
88%inclusion22 decks25 decks
-3%synergy
Arcane Sanctum
64%inclusion16 decks25 decks
9%synergy
Caves of Koilos
56%inclusion14 decks25 decks
21%synergy
Underground River
52%inclusion13 decks25 decks
19%synergy
Adarkar Wastes
52%inclusion13 decks25 decks
21%synergy
Godless Shrine
48%inclusion12 decks25 decks
-2%synergy
Hallowed Fountain
48%inclusion12 decks25 decks
-1%synergy
Flooded Strand
44%inclusion11 decks25 decks
6%synergy
Terramorphic Expanse
44%inclusion11 decks25 decks
27%synergy
Isolated Chapel
44%inclusion11 decks25 decks
5%synergy
Drowned Catacomb
44%inclusion11 decks25 decks
8%synergy
Exotic Orchard
40%inclusion10 decks25 decks
-19%synergy
Prairie Stream
40%inclusion10 decks25 decks
-1%synergy
Raffine's Tower
40%inclusion10 decks25 decks
-1%synergy
Vault of Champions
40%inclusion10 decks25 decks
7%synergy
Watery Grave
40%inclusion10 decks25 decks
-10%synergy
Undercity Sewers
36%inclusion9 decks25 decks
22%synergy
Sea of Clouds
36%inclusion9 decks25 decks
0%synergy
Evolving Wilds
36%inclusion9 decks25 decks
11%synergy
Meticulous Archive
36%inclusion9 decks25 decks
22%synergy
Glacial Fortress
32%inclusion8 decks25 decks
-8%synergy
Morphic Pool
32%inclusion8 decks25 decks
-2%synergy
Sunken Hollow
32%inclusion8 decks25 decks
-8%synergy
Marsh Flats
32%inclusion8 decks25 decks
-4%synergy
Obscura Storefront
32%inclusion8 decks25 decks
22%synergy
Polluted Delta
32%inclusion8 decks25 decks
-5%synergy
Tainted Isle
24%inclusion6 decks25 decks
18%synergy
Shadowy Backstreet
24%inclusion6 decks25 decks
12%synergy
Contaminated Landscape
24%inclusion6 decks25 decks
9%synergy
Tainted Field
24%inclusion6 decks25 decks
17%synergy
Shipwreck Marsh
24%inclusion6 decks25 decks
3%synergy
Valgavoth's Lair
20%inclusion5 decks25 decks
17%synergy
Azorius Chancery
20%inclusion5 decks25 decks
5%synergy
Shattered Sanctum
20%inclusion5 decks25 decks
4%synergy
Fell the Profane
16%inclusion4 decks25 decks
7%synergy
Port Town
16%inclusion4 decks25 decks
-1%synergy
Path of Ancestry
16%inclusion4 decks25 decks
-11%synergy
Scrubland
16%inclusion4 decks25 decks
0%synergy
City of Brass
16%inclusion4 decks25 decks
1%synergy
Misty Rainforest
12%inclusion3 decks25 decks
1%synergy
Hagra Mauling
12%inclusion3 decks25 decks
11%synergy
Tundra
12%inclusion3 decks25 decks
-4%synergy
Temple of Deceit
12%inclusion3 decks25 decks
-6%synergy
Dimir Aqueduct
12%inclusion3 decks25 decks
-2%synergy
Underground Sea
12%inclusion3 decks25 decks
-4%synergy
Ash Barrens
12%inclusion3 decks25 decks
1%synergy
Temple of Enlightenment
12%inclusion3 decks25 decks
-5%synergy
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