The Master of Keys (Commander) - Expensive Upgraded

The Master of Keys
Rank #304
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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
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Utility Lands
Mana Artifacts
Lands
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Noggle the Mind
5.6%inclusion1 decks18 decks
5%synergy
Mirrorform
5.3%inclusion1 decks19 decks
4%synergy
Grave Venerations
5.3%inclusion1 decks19 decks
5%synergy
High Synergy Cards
Animate Dead
84%inclusion41 decks49 decks
74%synergy
Ripples of Undeath
73%inclusion36 decks49 decks
71%synergy
Necromancy
71%inclusion35 decks49 decks
67%synergy
Inquisitive Glimmer
67%inclusion33 decks49 decks
60%synergy
Dress Down
61%inclusion30 decks49 decks
59%synergy
Dance of the Dead
59%inclusion29 decks49 decks
57%synergy
Amphibian Downpour
57%inclusion28 decks49 decks
53%synergy
Sevinne's Reclamation
59%inclusion29 decks49 decks
50%synergy
Entity Tracker
53%inclusion26 decks49 decks
47%synergy
Gravebreaker Lamia
47%inclusion23 decks49 decks
46%synergy
Top Cards
Mystic Remora
63%inclusion31 decks49 decks
42%synergy
Propaganda
55%inclusion27 decks49 decks
27%synergy
Swords to Plowshares
53%inclusion26 decks49 decks
-15%synergy
Entomb
51%inclusion25 decks49 decks
44%synergy
Sphere of Safety
51%inclusion25 decks49 decks
42%synergy
Mirrormade
49%inclusion24 decks49 decks
39%synergy
Demon of Fate's Design
47%inclusion23 decks49 decks
41%synergy
Ghostly Prison
45%inclusion22 decks49 decks
23%synergy
Blind Obedience
43%inclusion21 decks49 decks
31%synergy
Mana Drain
43%inclusion21 decks49 decks
26%synergy
Game Changers
Rhystic Study
55%inclusion27 decks49 decks
24%synergy
Smothering Tithe
53%inclusion26 decks49 decks
22%synergy
Gifts Ungiven
18%inclusion9 decks49 decks
16%synergy
Enlightened Tutor
16%inclusion8 decks49 decks
-3%synergy
Serra's Sanctum
16%inclusion8 decks49 decks
15%synergy
Farewell
14%inclusion7 decks49 decks
2%synergy
The One Ring
14%inclusion7 decks49 decks
1%synergy
Demonic Tutor
14%inclusion7 decks49 decks
-6%synergy
Intuition
12%inclusion6 decks49 decks
11%synergy
Necropotence
10%inclusion5 decks49 decks
4%synergy
Creatures
Starfield Mystic
43%inclusion21 decks49 decks
36%synergy
Zur the Enchanter
43%inclusion21 decks49 decks
38%synergy
Fear of Impostors
41%inclusion20 decks49 decks
39%synergy
Mesa Enchantress
41%inclusion20 decks49 decks
32%synergy
Scrabbling Skullcrab
39%inclusion19 decks49 decks
38%synergy
Overlord of the Balemurk
37%inclusion18 decks49 decks
35%synergy
Ondu Spiritdancer
33%inclusion16 decks49 decks
26%synergy
Overlord of the Floodpits
33%inclusion16 decks49 decks
29%synergy
Esper Sentinel
31%inclusion15 decks49 decks
3%synergy
Fear of Sleep Paralysis
31%inclusion15 decks49 decks
25%synergy
Zur, Eternal Schemer
31%inclusion15 decks49 decks
27%synergy
Hedron Crab
29%inclusion14 decks49 decks
28%synergy
Victor, Valgavoth's Seneschal
27%inclusion13 decks49 decks
25%synergy
Abdel Adrian, Gorion's Ward
27%inclusion13 decks49 decks
25%synergy
Hullbreaker Horror
22%inclusion11 decks49 decks
16%synergy
Lotho, Corrupt Shirriff
22%inclusion11 decks49 decks
6%synergy
Doomwake Giant
22%inclusion11 decks49 decks
17%synergy
Enduring Curiosity
20%inclusion10 decks49 decks
12%synergy
Ghostly Dancers
20%inclusion10 decks49 decks
18%synergy
Psychic Frog
18%inclusion9 decks49 decks
11%synergy
Lurrus of the Dream-Den
18%inclusion9 decks49 decks
17%synergy
Ledger Shredder
18%inclusion9 decks49 decks
10%synergy
Witch Enchanter
18%inclusion9 decks49 decks
11%synergy
Silent Hallcreeper
18%inclusion9 decks49 decks
14%synergy
Grim Guardian
16%inclusion8 decks49 decks
14%synergy
Sage of Mysteries
16%inclusion8 decks49 decks
16%synergy
Overlord of the Mistmoors
16%inclusion8 decks49 decks
14%synergy
Displacer Kitten
16%inclusion8 decks49 decks
9%synergy
Valgavoth, Terror Eater
14%inclusion7 decks49 decks
11%synergy
Aminatou, Veil Piercer
14%inclusion7 decks49 decks
13%synergy
Grand Abolisher
14%inclusion7 decks49 decks
0%synergy
Valley Floodcaller
12%inclusion6 decks49 decks
8%synergy
Boggart Trawler
12%inclusion6 decks49 decks
9%synergy
Leonin Relic-Warder
12%inclusion6 decks49 decks
12%synergy
Hydroelectric Specimen
10%inclusion5 decks49 decks
7%synergy
Sun Titan
10%inclusion5 decks49 decks
2%synergy
Archon of Sun's Grace
10%inclusion5 decks49 decks
6%synergy
Moon-Blessed Cleric
10%inclusion5 decks49 decks
5%synergy
Laboratory Maniac
10%inclusion5 decks49 decks
7%synergy
Heliod, the Radiant Dawn
10%inclusion5 decks49 decks
7%synergy
Summon: Yojimbo
10%inclusion4 decks40 decks
9%synergy
Voice of Victory
9.1%inclusion4 decks44 decks
1%synergy
Doom Whisperer
8.2%inclusion4 decks49 decks
7%synergy
Mindwrack Harpy
8.2%inclusion4 decks49 decks
8%synergy
Thassa's Oracle
8.2%inclusion4 decks49 decks
-1%synergy
Soaring Lightbringer
8.2%inclusion4 decks49 decks
3%synergy
Talion, the Kindly Lord
8.2%inclusion4 decks49 decks
0%synergy
Neerdiv, Devious Diver
8.2%inclusion4 decks49 decks
8%synergy
Ghostly Pilferer
8.2%inclusion4 decks49 decks
1%synergy
Stenn, Paranoid Partisan
8.2%inclusion4 decks49 decks
7%synergy
Instants
Swan Song
39%inclusion19 decks49 decks
19%synergy
An Offer You Can't Refuse
37%inclusion18 decks49 decks
10%synergy
Sink into Stupor
37%inclusion18 decks49 decks
24%synergy
Counterspell
35%inclusion17 decks49 decks
-7%synergy
Dark Ritual
35%inclusion17 decks49 decks
15%synergy
Arcane Denial
29%inclusion14 decks49 decks
8%synergy
Path to Exile
22%inclusion11 decks49 decks
-20%synergy
Cabal Ritual
18%inclusion9 decks49 decks
15%synergy
Fell the Profane
18%inclusion9 decks49 decks
10%synergy
Dovin's Veto
16%inclusion8 decks49 decks
-9%synergy
Frantic Search
14%inclusion7 decks49 decks
-4%synergy
Void Rend
14%inclusion7 decks49 decks
-20%synergy
Darkblast
12%inclusion6 decks49 decks
12%synergy
Silence
10%inclusion5 decks49 decks
0%synergy
Teferi's Protection
10%inclusion5 decks49 decks
-6%synergy
Strix Serenade
10%inclusion5 decks49 decks
7%synergy
Otherworldly Gaze
10%inclusion5 decks49 decks
8%synergy
Cyclonic Rift
10%inclusion5 decks49 decks
-13%synergy
Thirst for Meaning
10%inclusion5 decks49 decks
9%synergy
Negate
8.2%inclusion4 decks49 decks
-8%synergy
Force of Negation
8.2%inclusion4 decks49 decks
-4%synergy
Flusterstorm
8.2%inclusion4 decks49 decks
0%synergy
Into the Flood Maw
8.2%inclusion4 decks49 decks
4%synergy
Generous Gift
8.2%inclusion4 decks49 decks
-6%synergy
Anguished Unmaking
8.2%inclusion4 decks49 decks
-17%synergy
Fierce Guardianship
8.2%inclusion4 decks49 decks
-12%synergy
Tainted Pact
6.1%inclusion3 decks49 decks
-1%synergy
Brainstorm
6.1%inclusion3 decks49 decks
-11%synergy
Perplex
6.1%inclusion3 decks49 decks
5%synergy
Delay
6.1%inclusion3 decks49 decks
4%synergy
Demonic Consultation
6.1%inclusion3 decks49 decks
-2%synergy
Vampiric Tutor
6.1%inclusion3 decks49 decks
-11%synergy
Muddle the Mixture
6.1%inclusion3 decks49 decks
2%synergy
Chain of Vapor
6.1%inclusion3 decks49 decks
3%synergy
Brain Freeze
6.1%inclusion3 decks49 decks
6%synergy
Inkshield
6.1%inclusion3 decks49 decks
-3%synergy
Waterlogged Teachings
6.1%inclusion3 decks49 decks
2%synergy
Faithful Mending
6.1%inclusion3 decks49 decks
2%synergy
Borne Upon a Wind
6.1%inclusion3 decks49 decks
1%synergy
Consult the Star Charts
5.7%inclusion2 decks35 decks
5%synergy
Sorceries
Reanimate
33%inclusion16 decks49 decks
17%synergy
Windfall
24%inclusion12 decks49 decks
11%synergy
Redress Fate
24%inclusion12 decks49 decks
19%synergy
Replenish
22%inclusion11 decks49 decks
21%synergy
Toxic Deluge
22%inclusion11 decks49 decks
3%synergy
Glimpse the Unthinkable
22%inclusion11 decks49 decks
22%synergy
Singularity Rupture
20%inclusion7 decks35 decks
18%synergy
Supreme Verdict
16%inclusion8 decks49 decks
2%synergy
Space-Time Anomaly
15%inclusion5 decks34 decks
13%synergy
Damn
14%inclusion7 decks49 decks
-6%synergy
Extinguish All Hope
14%inclusion7 decks49 decks
13%synergy
Idyllic Tutor
10%inclusion5 decks49 decks
6%synergy
Lively Dirge
10%inclusion5 decks49 decks
9%synergy
Ponder
8.2%inclusion4 decks49 decks
-1%synergy
Austere Command
8.2%inclusion4 decks49 decks
-1%synergy
Resurgent Belief
8.2%inclusion4 decks49 decks
6%synergy
Demonic Counsel
8.2%inclusion4 decks49 decks
7%synergy
Beseech the Mirror
8.2%inclusion4 decks49 decks
4%synergy
Dance of the Manse
8.2%inclusion4 decks49 decks
5%synergy
Wrath of God
6.1%inclusion3 decks49 decks
2%synergy
Sea Gate Restoration
6.1%inclusion3 decks49 decks
3%synergy
Diabolic Intent
6.1%inclusion3 decks49 decks
1%synergy
Time Wipe
6.1%inclusion3 decks49 decks
-1%synergy
Blasphemous Edict
6.1%inclusion3 decks49 decks
4%synergy
Scheming Symmetry
6.1%inclusion3 decks49 decks
5%synergy
Buried Alive
6.1%inclusion3 decks49 decks
2%synergy
Utility Artifacts
Mesmeric Orb
35%inclusion17 decks49 decks
34%synergy
Lightning Greaves
16%inclusion8 decks49 decks
-6%synergy
Perpetual Timepiece
10%inclusion5 decks49 decks
10%synergy
Wishclaw Talisman
10%inclusion5 decks49 decks
2%synergy
Cloud Key
10%inclusion5 decks49 decks
7%synergy
Crucible of Worlds
10%inclusion5 decks49 decks
9%synergy
Swiftfoot Boots
6.1%inclusion3 decks49 decks
-18%synergy
Wayfarer's Bauble
6.1%inclusion3 decks49 decks
-2%synergy
Enchantments
The Meathook Massacre
41%inclusion20 decks49 decks
37%synergy
Seal of Cleansing
37%inclusion18 decks49 decks
35%synergy
Secret Arcade // Dusty Parlor
37%inclusion18 decks49 decks
32%synergy
Grasp of Fate
35%inclusion17 decks49 decks
29%synergy
Estrid's Invocation
35%inclusion17 decks49 decks
30%synergy
Imprisoned in the Moon
35%inclusion17 decks49 decks
28%synergy
Greater Auramancy
31%inclusion15 decks49 decks
26%synergy
Sigil of the Empty Throne
29%inclusion14 decks49 decks
23%synergy
Out of the Tombs
29%inclusion14 decks49 decks
28%synergy
Darksteel Mutation
29%inclusion14 decks49 decks
22%synergy
Stillness in Motion
27%inclusion12 decks44 decks
27%synergy
Cemetery Tampering
27%inclusion13 decks49 decks
26%synergy
Black Market Connections
27%inclusion13 decks49 decks
12%synergy
Polluted Cistern // Dim Oubliette
27%inclusion13 decks49 decks
26%synergy
Seal of Removal
27%inclusion13 decks49 decks
26%synergy
Copy Enchantment
24%inclusion12 decks49 decks
20%synergy
Tinybones Joins Up
22%inclusion11 decks49 decks
21%synergy
Touch the Spirit Realm
22%inclusion11 decks49 decks
20%synergy
Trouble in Pairs
22%inclusion11 decks49 decks
17%synergy
The Tale of Tamiyo
22%inclusion11 decks49 decks
22%synergy
Static Prison
22%inclusion11 decks49 decks
22%synergy
Leyline of Anticipation
20%inclusion10 decks49 decks
16%synergy
Starfield of Nyx
18%inclusion9 decks49 decks
14%synergy
Out of Time
16%inclusion8 decks49 decks
15%synergy
Land Tax
16%inclusion8 decks49 decks
10%synergy
Solitary Confinement
16%inclusion8 decks49 decks
14%synergy
Defiled Crypt // Cadaver Lab
16%inclusion8 decks49 decks
16%synergy
Authority of the Consuls
16%inclusion8 decks49 decks
4%synergy
Sheltered by Ghosts
16%inclusion8 decks49 decks
14%synergy
Aura of Silence
16%inclusion8 decks49 decks
13%synergy
Cacophony Unleashed
14%inclusion7 decks49 decks
13%synergy
Shark Typhoon
14%inclusion7 decks49 decks
8%synergy
All That Glitters
14%inclusion7 decks49 decks
6%synergy
Dazzling Theater // Prop Room
14%inclusion7 decks49 decks
13%synergy
Court of Cunning
14%inclusion7 decks49 decks
13%synergy
Extravagant Replication
14%inclusion7 decks49 decks
9%synergy
Funeral Room // Awakening Hall
14%inclusion7 decks49 decks
13%synergy
Bottomless Pool // Locker Room
14%inclusion7 decks49 decks
12%synergy
Mirror Room // Fractured Realm
14%inclusion7 decks49 decks
12%synergy
Hallowed Haunting
12%inclusion6 decks49 decks
10%synergy
Phyrexian Arena
12%inclusion6 decks49 decks
-2%synergy
Copy Artifact
12%inclusion6 decks49 decks
11%synergy
Timely Ward
12%inclusion6 decks49 decks
7%synergy
Seal of Doom
12%inclusion6 decks49 decks
12%synergy
Restricted Office // Lecture Hall
12%inclusion6 decks49 decks
10%synergy
Chakra Meditation
11%inclusion3 decks27 decks
11%synergy
One with the Multiverse
10%inclusion5 decks49 decks
5%synergy
Founding the Third Path
10%inclusion5 decks49 decks
10%synergy
Chronic Flooding
10%inclusion5 decks49 decks
10%synergy
Monologue Tax
10%inclusion5 decks49 decks
4%synergy
Planeswalkers
Teferi, Time Raveler
12%inclusion6 decks49 decks
4%synergy
Ashiok, Dream Render
8.2%inclusion4 decks49 decks
7%synergy
Utility Lands
Otawara, Soaring City
47%inclusion23 decks49 decks
28%synergy
Hall of Heliod's Generosity
45%inclusion22 decks49 decks
32%synergy
Cephalid Coliseum
29%inclusion14 decks49 decks
25%synergy
Takenuma, Abandoned Mire
29%inclusion14 decks49 decks
22%synergy
Bojuka Bog
24%inclusion12 decks49 decks
-3%synergy
Urborg, Tomb of Yawgmoth
22%inclusion11 decks49 decks
9%synergy
Urza's Saga
22%inclusion11 decks49 decks
11%synergy
Reliquary Tower
16%inclusion8 decks49 decks
-18%synergy
Mystic Sanctuary
12%inclusion6 decks49 decks
8%synergy
Eiganjo, Seat of the Empire
10%inclusion5 decks49 decks
5%synergy
Ancient Tomb
8.2%inclusion4 decks49 decks
-5%synergy
Ancient Den
6.1%inclusion3 decks49 decks
-2%synergy
Minamo, School at Water's Edge
6.1%inclusion3 decks49 decks
2%synergy
Seat of the Synod
6.1%inclusion3 decks49 decks
-3%synergy
Vault of Whispers
6.1%inclusion3 decks49 decks
-2%synergy
Geier Reach Sanitarium
6.1%inclusion3 decks49 decks
2%synergy
Mana Artifacts
Sol Ring
94%inclusion46 decks49 decks
4%synergy
Arcane Signet
86%inclusion42 decks49 decks
-2%synergy
Talisman of Progress
55%inclusion27 decks49 decks
11%synergy
Talisman of Dominance
53%inclusion26 decks49 decks
3%synergy
Talisman of Hierarchy
49%inclusion24 decks49 decks
5%synergy
Fellwar Stone
41%inclusion20 decks49 decks
7%synergy
Azorius Signet
20%inclusion10 decks49 decks
-11%synergy
Lotus Petal
18%inclusion9 decks49 decks
8%synergy
Dimir Signet
16%inclusion8 decks49 decks
-15%synergy
Orzhov Signet
16%inclusion8 decks49 decks
-17%synergy
Mox Opal
10%inclusion5 decks49 decks
2%synergy
Mox Amber
10%inclusion5 decks49 decks
4%synergy
Commander's Sphere
6.1%inclusion3 decks49 decks
-12%synergy
Lands
Command Tower
100%inclusion49 decks49 decks
7%synergy
Underground Sea
98%inclusion48 decks49 decks
82%synergy
Tundra
98%inclusion48 decks49 decks
82%synergy
Scrubland
96%inclusion47 decks49 decks
80%synergy
Watery Grave
94%inclusion46 decks49 decks
43%synergy
Hallowed Fountain
94%inclusion46 decks49 decks
44%synergy
Godless Shrine
92%inclusion45 decks49 decks
41%synergy
Marsh Flats
90%inclusion44 decks49 decks
54%synergy
Polluted Delta
90%inclusion44 decks49 decks
52%synergy
Flooded Strand
90%inclusion44 decks49 decks
52%synergy
Island
86%inclusion42 decks49 decks
-7%synergy
Swamp
86%inclusion42 decks49 decks
-6%synergy
Plains
84%inclusion41 decks49 decks
-8%synergy
Raffine's Tower
71%inclusion35 decks49 decks
31%synergy
Sea of Clouds
69%inclusion34 decks49 decks
34%synergy
Undercity Sewers
67%inclusion33 decks49 decks
53%synergy
Vault of Champions
65%inclusion32 decks49 decks
33%synergy
Morphic Pool
65%inclusion32 decks49 decks
31%synergy
Meticulous Archive
63%inclusion31 decks49 decks
49%synergy
Exotic Orchard
55%inclusion27 decks49 decks
-4%synergy
Shadowy Backstreet
55%inclusion27 decks49 decks
42%synergy
Misty Rainforest
47%inclusion23 decks49 decks
36%synergy
Floodfarm Verge
41%inclusion20 decks49 decks
30%synergy
Arid Mesa
41%inclusion20 decks49 decks
31%synergy
Mana Confluence
39%inclusion19 decks49 decks
25%synergy
Scalding Tarn
39%inclusion19 decks49 decks
28%synergy
City of Brass
39%inclusion19 decks49 decks
24%synergy
Windswept Heath
37%inclusion18 decks49 decks
27%synergy
Sink into Stupor
37%inclusion18 decks49 decks
24%synergy
Bloodstained Mire
35%inclusion17 decks49 decks
24%synergy
Gloomlake Verge
33%inclusion16 decks49 decks
22%synergy
Verdant Catacombs
33%inclusion16 decks49 decks
23%synergy
Caves of Koilos
31%inclusion15 decks49 decks
-5%synergy
Prismatic Vista
31%inclusion15 decks49 decks
27%synergy
Underground River
29%inclusion14 decks49 decks
-5%synergy
Arcane Sanctum
29%inclusion14 decks49 decks
-26%synergy
Adarkar Wastes
29%inclusion14 decks49 decks
-3%synergy
Glacial Fortress
22%inclusion11 decks49 decks
-19%synergy
Isolated Chapel
20%inclusion10 decks49 decks
-20%synergy
Drowned Catacomb
20%inclusion10 decks49 decks
-17%synergy
Bleachbone Verge
18%inclusion9 decks49 decks
10%synergy
Fell the Profane
18%inclusion9 decks49 decks
10%synergy
Witch Enchanter
18%inclusion9 decks49 decks
11%synergy
Deserted Beach
16%inclusion8 decks49 decks
-4%synergy
Shipwreck Marsh
14%inclusion7 decks49 decks
-6%synergy
Azorius Chancery
14%inclusion7 decks49 decks
0%synergy
Valgavoth's Lair
14%inclusion7 decks49 decks
12%synergy
Shattered Sanctum
14%inclusion7 decks49 decks
-2%synergy
Boggart Trawler
12%inclusion6 decks49 decks
9%synergy
Brightclimb Pathway
12%inclusion6 decks49 decks
6%synergy
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