The Master of Keys (Commander) - Expensive Upgraded

The Master of Keys
Rank #304
60decks
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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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Falcon and Redwing
9.1%inclusion1 decks11 decks
9%synergy
High Synergy Cards
Ripples of Undeath
77%inclusion46 decks60 decks
74%synergy
Animate Dead
83%inclusion50 decks60 decks
74%synergy
Necromancy
75%inclusion45 decks60 decks
71%synergy
Inquisitive Glimmer
65%inclusion39 decks60 decks
58%synergy
Dress Down
57%inclusion34 decks60 decks
54%synergy
Amphibian Downpour
58%inclusion35 decks60 decks
54%synergy
Dance of the Dead
55%inclusion33 decks60 decks
53%synergy
Entomb
55%inclusion33 decks60 decks
48%synergy
Sevinne's Reclamation
52%inclusion31 decks60 decks
43%synergy
Gravebreaker Lamia
43%inclusion26 decks60 decks
42%synergy
Top Cards
Mystic Remora
58%inclusion35 decks60 decks
38%synergy
Swords to Plowshares
58%inclusion35 decks60 decks
-9%synergy
Propaganda
57%inclusion34 decks60 decks
28%synergy
Mirrormade
52%inclusion31 decks60 decks
42%synergy
Sphere of Safety
48%inclusion29 decks60 decks
39%synergy
Demon of Fate's Design
45%inclusion27 decks60 decks
40%synergy
Entity Tracker
45%inclusion27 decks60 decks
39%synergy
Fear of Impostors
43%inclusion26 decks60 decks
42%synergy
Swan Song
43%inclusion26 decks60 decks
23%synergy
Mana Drain
42%inclusion25 decks60 decks
24%synergy
Game Changers
Smothering Tithe
55%inclusion33 decks60 decks
25%synergy
Rhystic Study
53%inclusion32 decks60 decks
23%synergy
Enlightened Tutor
20%inclusion12 decks60 decks
1%synergy
Serra's Sanctum
18%inclusion11 decks60 decks
17%synergy
Demonic Tutor
17%inclusion10 decks60 decks
-4%synergy
Gifts Ungiven
15%inclusion9 decks60 decks
12%synergy
Thassa's Oracle
13%inclusion8 decks60 decks
5%synergy
Intuition
13%inclusion8 decks60 decks
12%synergy
Ancient Tomb
12%inclusion7 decks60 decks
-1%synergy
The One Ring
12%inclusion7 decks60 decks
-1%synergy
Creatures
Scrabbling Skullcrab
38%inclusion23 decks60 decks
37%synergy
Starfield Mystic
38%inclusion23 decks60 decks
32%synergy
Mesa Enchantress
38%inclusion23 decks60 decks
30%synergy
Zur the Enchanter
38%inclusion23 decks60 decks
33%synergy
Overlord of the Balemurk
37%inclusion22 decks60 decks
35%synergy
Esper Sentinel
33%inclusion20 decks60 decks
6%synergy
Fear of Sleep Paralysis
33%inclusion20 decks60 decks
28%synergy
Lotho, Corrupt Shirriff
30%inclusion18 decks60 decks
13%synergy
Hedron Crab
30%inclusion18 decks60 decks
29%synergy
Overlord of the Floodpits
28%inclusion17 decks60 decks
25%synergy
Doomwake Giant
27%inclusion16 decks60 decks
21%synergy
Victor, Valgavoth's Seneschal
27%inclusion16 decks60 decks
25%synergy
Ondu Spiritdancer
27%inclusion16 decks60 decks
21%synergy
Abdel Adrian, Gorion's Ward
25%inclusion15 decks60 decks
23%synergy
Zur, Eternal Schemer
23%inclusion14 decks60 decks
20%synergy
Enduring Curiosity
23%inclusion14 decks60 decks
15%synergy
Witch Enchanter
20%inclusion12 decks60 decks
13%synergy
Hullbreaker Horror
18%inclusion11 decks60 decks
12%synergy
Sage of Mysteries
17%inclusion10 decks60 decks
16%synergy
Grand Abolisher
17%inclusion10 decks60 decks
2%synergy
Valley Floodcaller
15%inclusion9 decks60 decks
11%synergy
Laboratory Maniac
15%inclusion9 decks60 decks
12%synergy
Ghostly Dancers
15%inclusion9 decks60 decks
13%synergy
Grim Guardian
15%inclusion9 decks60 decks
13%synergy
Ledger Shredder
15%inclusion9 decks60 decks
6%synergy
Displacer Kitten
13%inclusion8 decks60 decks
7%synergy
Lurrus of the Dream-Den
13%inclusion8 decks60 decks
12%synergy
Angel of Suffering
13%inclusion8 decks60 decks
13%synergy
Silent Hallcreeper
13%inclusion8 decks60 decks
9%synergy
Boggart Trawler
13%inclusion8 decks60 decks
10%synergy
Psychic Frog
13%inclusion8 decks60 decks
6%synergy
Aminatou, Veil Piercer
12%inclusion7 decks60 decks
10%synergy
Valgavoth, Terror Eater
12%inclusion7 decks60 decks
8%synergy
Overlord of the Mistmoors
12%inclusion7 decks60 decks
10%synergy
Moon-Blessed Cleric
12%inclusion7 decks60 decks
7%synergy
Voice of Victory
11%inclusion6 decks56 decks
2%synergy
Sheoldred, the Apocalypse
10%inclusion6 decks60 decks
1%synergy
Archon of Sun's Grace
10%inclusion6 decks60 decks
6%synergy
Doom Whisperer
10%inclusion6 decks60 decks
9%synergy
Wan Shi Tong, Librarian
10%inclusion4 decks40 decks
5%synergy
Stenn, Paranoid Partisan
8.3%inclusion5 decks60 decks
7%synergy
Hydroelectric Specimen
8.3%inclusion5 decks60 decks
5%synergy
Soaring Lightbringer
8.3%inclusion5 decks60 decks
4%synergy
Faerie Mastermind
8.3%inclusion5 decks60 decks
-1%synergy
Neerdiv, Devious Diver
8.3%inclusion5 decks60 decks
8%synergy
Heliod, the Radiant Dawn
8.3%inclusion5 decks60 decks
5%synergy
Leonin Relic-Warder
8.3%inclusion5 decks60 decks
8%synergy
Mirror-Mad Phantasm
8.3%inclusion5 decks60 decks
8%synergy
Talion, the Kindly Lord
8.3%inclusion5 decks60 decks
1%synergy
Sun Titan
8.3%inclusion5 decks60 decks
0%synergy
Instants
An Offer You Can't Refuse
40%inclusion24 decks60 decks
12%synergy
Dark Ritual
37%inclusion22 decks60 decks
16%synergy
Counterspell
37%inclusion22 decks60 decks
-5%synergy
Sink into Stupor
37%inclusion22 decks60 decks
24%synergy
Arcane Denial
30%inclusion18 decks60 decks
10%synergy
Path to Exile
27%inclusion16 decks60 decks
-16%synergy
Fell the Profane
18%inclusion11 decks60 decks
9%synergy
Dovin's Veto
18%inclusion11 decks60 decks
-8%synergy
Cabal Ritual
17%inclusion10 decks60 decks
13%synergy
Void Rend
15%inclusion9 decks60 decks
-20%synergy
Frantic Search
13%inclusion8 decks60 decks
-5%synergy
Otherworldly Gaze
13%inclusion8 decks60 decks
11%synergy
Flusterstorm
13%inclusion8 decks60 decks
6%synergy
Force of Negation
12%inclusion7 decks60 decks
-0%synergy
Brain Freeze
10%inclusion6 decks60 decks
9%synergy
Silence
10%inclusion6 decks60 decks
0%synergy
Anguished Unmaking
10%inclusion6 decks60 decks
-16%synergy
Darkblast
10%inclusion6 decks60 decks
10%synergy
Fierce Guardianship
10%inclusion6 decks60 decks
-10%synergy
Muddle the Mixture
8.3%inclusion5 decks60 decks
5%synergy
Teferi's Protection
8.3%inclusion5 decks60 decks
-8%synergy
Mental Misstep
8.3%inclusion5 decks60 decks
2%synergy
Thirst for Meaning
8.3%inclusion5 decks60 decks
7%synergy
Strix Serenade
8.3%inclusion5 decks60 decks
5%synergy
Perplex
8.3%inclusion5 decks60 decks
7%synergy
Into the Flood Maw
8.3%inclusion5 decks60 decks
5%synergy
Cyclonic Rift
8.3%inclusion5 decks60 decks
-14%synergy
Vampiric Tutor
8.3%inclusion5 decks60 decks
-8%synergy
Pact of Negation
8.3%inclusion5 decks60 decks
1%synergy
Tainted Pact
6.7%inclusion4 decks60 decks
0%synergy
Chain of Vapor
6.7%inclusion4 decks60 decks
4%synergy
Negate
6.7%inclusion4 decks60 decks
-10%synergy
Brainstorm
6.7%inclusion4 decks60 decks
-10%synergy
Force of Will
6.7%inclusion4 decks60 decks
-6%synergy
Waterlogged Teachings
6.7%inclusion4 decks60 decks
2%synergy
Generous Gift
6.7%inclusion4 decks60 decks
-7%synergy
Demonic Consultation
6.7%inclusion4 decks60 decks
-1%synergy
Deadly Rollick
5.0%inclusion3 decks60 decks
-11%synergy
Fact or Fiction
5.0%inclusion3 decks60 decks
1%synergy
Culling the Weak
5.0%inclusion3 decks60 decks
3%synergy
Mindbreak Trap
5.0%inclusion3 decks60 decks
-2%synergy
Delay
5.0%inclusion3 decks60 decks
3%synergy
Drown in Dreams
5.0%inclusion3 decks60 decks
5%synergy
Inkshield
5.0%inclusion3 decks60 decks
-5%synergy
Faithful Mending
5.0%inclusion3 decks60 decks
1%synergy
Borne Upon a Wind
5.0%inclusion3 decks60 decks
0%synergy
Sorceries
Reanimate
30%inclusion18 decks60 decks
14%synergy
Windfall
28%inclusion17 decks60 decks
15%synergy
Replenish
23%inclusion14 decks60 decks
22%synergy
Toxic Deluge
23%inclusion14 decks60 decks
4%synergy
Glimpse the Unthinkable
22%inclusion13 decks60 decks
21%synergy
Redress Fate
20%inclusion12 decks60 decks
15%synergy
Space-Time Anomaly
15%inclusion7 decks46 decks
14%synergy
Damn
15%inclusion9 decks60 decks
-5%synergy
Singularity Rupture
15%inclusion7 decks47 decks
13%synergy
Idyllic Tutor
13%inclusion8 decks60 decks
9%synergy
Extinguish All Hope
13%inclusion8 decks60 decks
12%synergy
Beseech the Mirror
13%inclusion8 decks60 decks
9%synergy
Supreme Verdict
12%inclusion7 decks60 decks
-3%synergy
Farewell
12%inclusion7 decks60 decks
-0%synergy
Lively Dirge
10%inclusion6 decks60 decks
9%synergy
Buried Alive
10%inclusion6 decks60 decks
6%synergy
Dance of the Manse
10%inclusion6 decks60 decks
7%synergy
Austere Command
8.3%inclusion5 decks60 decks
0%synergy
Ponder
6.7%inclusion4 decks60 decks
-2%synergy
Diabolic Intent
6.7%inclusion4 decks60 decks
2%synergy
Resurgent Belief
6.7%inclusion4 decks60 decks
5%synergy
Agadeem's Awakening
6.7%inclusion4 decks60 decks
5%synergy
Blasphemous Edict
6.7%inclusion4 decks60 decks
4%synergy
Demonic Counsel
6.7%inclusion4 decks60 decks
6%synergy
Sea Gate Restoration
6.7%inclusion4 decks60 decks
4%synergy
Scheming Symmetry
6.7%inclusion4 decks60 decks
5%synergy
Imperial Seal
5.0%inclusion3 decks60 decks
-2%synergy
Careful Study
5.0%inclusion3 decks60 decks
3%synergy
Time Wipe
5.0%inclusion3 decks60 decks
-1%synergy
Whispering Madness
5.0%inclusion3 decks60 decks
4%synergy
Night's Whisper
5.0%inclusion3 decks60 decks
2%synergy
Mnemonic Betrayal
5.0%inclusion3 decks60 decks
2%synergy
Utility Artifacts
Mesmeric Orb
37%inclusion22 decks60 decks
36%synergy
Crucible of Worlds
12%inclusion7 decks60 decks
11%synergy
Wishclaw Talisman
12%inclusion7 decks60 decks
4%synergy
Lightning Greaves
12%inclusion7 decks60 decks
-11%synergy
Perpetual Timepiece
10%inclusion6 decks60 decks
10%synergy
Cloud Key
6.7%inclusion4 decks60 decks
3%synergy
Swiftfoot Boots
5.0%inclusion3 decks60 decks
-19%synergy
Enchantments
Ghostly Prison
42%inclusion25 decks60 decks
19%synergy
Seal of Cleansing
42%inclusion25 decks60 decks
40%synergy
Blind Obedience
38%inclusion23 decks60 decks
26%synergy
The Meathook Massacre
37%inclusion22 decks60 decks
33%synergy
Out of the Tombs
33%inclusion20 decks60 decks
33%synergy
Secret Arcade // Dusty Parlor
33%inclusion20 decks60 decks
29%synergy
Cemetery Tampering
32%inclusion19 decks60 decks
31%synergy
Estrid's Invocation
30%inclusion18 decks60 decks
25%synergy
Stillness in Motion
29%inclusion16 decks56 decks
28%synergy
Grasp of Fate
28%inclusion17 decks60 decks
22%synergy
Sigil of the Empty Throne
28%inclusion17 decks60 decks
23%synergy
Imprisoned in the Moon
27%inclusion16 decks60 decks
20%synergy
Greater Auramancy
27%inclusion16 decks60 decks
22%synergy
Copy Enchantment
25%inclusion15 decks60 decks
20%synergy
Polluted Cistern // Dim Oubliette
25%inclusion15 decks60 decks
24%synergy
Seal of Removal
25%inclusion15 decks60 decks
24%synergy
Black Market Connections
25%inclusion15 decks60 decks
10%synergy
Starfield of Nyx
23%inclusion14 decks60 decks
19%synergy
Darksteel Mutation
22%inclusion13 decks60 decks
16%synergy
Tinybones Joins Up
22%inclusion13 decks60 decks
21%synergy
Static Prison
22%inclusion13 decks60 decks
21%synergy
Authority of the Consuls
20%inclusion12 decks60 decks
7%synergy
Leyline of Anticipation
20%inclusion12 decks60 decks
16%synergy
The Tale of Tamiyo
18%inclusion11 decks60 decks
18%synergy
Touch the Spirit Realm
18%inclusion11 decks60 decks
16%synergy
Solitary Confinement
18%inclusion11 decks60 decks
16%synergy
No Mercy
17%inclusion10 decks60 decks
14%synergy
Bloodchief Ascension
17%inclusion10 decks60 decks
11%synergy
Aura of Silence
17%inclusion10 decks60 decks
14%synergy
Trouble in Pairs
17%inclusion10 decks60 decks
11%synergy
Cacophony Unleashed
15%inclusion9 decks60 decks
13%synergy
Court of Cunning
15%inclusion9 decks60 decks
14%synergy
Changing Loyalty
14%inclusion3 decks21 decks
13%synergy
Chronic Flooding
13%inclusion8 decks60 decks
13%synergy
All That Glitters
13%inclusion8 decks60 decks
5%synergy
Sheltered by Ghosts
13%inclusion8 decks60 decks
11%synergy
Out of Time
13%inclusion8 decks60 decks
12%synergy
Defiled Crypt // Cadaver Lab
13%inclusion8 decks60 decks
13%synergy
Chakra Meditation
13%inclusion5 decks39 decks
13%synergy
Founding the Third Path
12%inclusion7 decks60 decks
11%synergy
Copy Artifact
12%inclusion7 decks60 decks
11%synergy
Shark Typhoon
12%inclusion7 decks60 decks
6%synergy
Attunement
12%inclusion7 decks60 decks
11%synergy
Monologue Tax
12%inclusion7 decks60 decks
5%synergy
Funeral Room // Awakening Hall
12%inclusion7 decks60 decks
11%synergy
Bottomless Pool // Locker Room
12%inclusion7 decks60 decks
10%synergy
Phyrexian Arena
12%inclusion7 decks60 decks
-2%synergy
Timely Ward
12%inclusion7 decks60 decks
7%synergy
Sinister Concoction
12%inclusion7 decks60 decks
12%synergy
Extravagant Replication
10%inclusion6 decks60 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
12%inclusion7 decks60 decks
3%synergy
Ashiok, Dream Render
10%inclusion6 decks60 decks
9%synergy
Jace, Wielder of Mysteries
8.3%inclusion5 decks60 decks
7%synergy
Utility Lands
Hall of Heliod's Generosity
45%inclusion27 decks60 decks
32%synergy
Otawara, Soaring City
42%inclusion25 decks60 decks
23%synergy
Bojuka Bog
30%inclusion18 decks60 decks
3%synergy
Takenuma, Abandoned Mire
28%inclusion17 decks60 decks
22%synergy
Urza's Saga
22%inclusion13 decks60 decks
10%synergy
Cephalid Coliseum
22%inclusion13 decks60 decks
18%synergy
Urborg, Tomb of Yawgmoth
18%inclusion11 decks60 decks
5%synergy
Mystic Sanctuary
15%inclusion9 decks60 decks
11%synergy
Reliquary Tower
13%inclusion8 decks60 decks
-21%synergy
Eiganjo, Seat of the Empire
8.3%inclusion5 decks60 decks
3%synergy
Minamo, School at Water's Edge
6.7%inclusion4 decks60 decks
3%synergy
Bazaar of Baghdad
6.7%inclusion4 decks60 decks
6%synergy
Spymaster's Vault
5.0%inclusion3 decks60 decks
3%synergy
Command Beacon
5.0%inclusion3 decks60 decks
2%synergy
Geier Reach Sanitarium
5.0%inclusion3 decks60 decks
1%synergy
Mana Artifacts
Sol Ring
95%inclusion57 decks60 decks
5%synergy
Arcane Signet
82%inclusion49 decks60 decks
-6%synergy
Talisman of Progress
57%inclusion34 decks60 decks
12%synergy
Talisman of Dominance
55%inclusion33 decks60 decks
5%synergy
Talisman of Hierarchy
50%inclusion30 decks60 decks
5%synergy
Fellwar Stone
38%inclusion23 decks60 decks
5%synergy
Azorius Signet
23%inclusion14 decks60 decks
-6%synergy
Lotus Petal
18%inclusion11 decks60 decks
8%synergy
Dimir Signet
18%inclusion11 decks60 decks
-12%synergy
Orzhov Signet
18%inclusion11 decks60 decks
-13%synergy
Mox Opal
10%inclusion6 decks60 decks
2%synergy
Mox Amber
8.3%inclusion5 decks60 decks
2%synergy
Commander's Sphere
6.7%inclusion4 decks60 decks
-11%synergy
Mana Vault
6.7%inclusion4 decks60 decks
-2%synergy
Mind Stone
6.7%inclusion4 decks60 decks
-5%synergy
Lands
Command Tower
100%inclusion60 decks60 decks
7%synergy
Tundra
97%inclusion58 decks60 decks
81%synergy
Underground Sea
97%inclusion58 decks60 decks
81%synergy
Scrubland
97%inclusion58 decks60 decks
81%synergy
Hallowed Fountain
97%inclusion58 decks60 decks
46%synergy
Watery Grave
97%inclusion58 decks60 decks
45%synergy
Godless Shrine
95%inclusion57 decks60 decks
43%synergy
Marsh Flats
90%inclusion54 decks60 decks
54%synergy
Flooded Strand
90%inclusion54 decks60 decks
51%synergy
Polluted Delta
90%inclusion54 decks60 decks
52%synergy
Swamp
85%inclusion51 decks60 decks
-7%synergy
Island
83%inclusion50 decks60 decks
-10%synergy
Plains
77%inclusion46 decks60 decks
-15%synergy
Undercity Sewers
68%inclusion41 decks60 decks
54%synergy
Raffine's Tower
67%inclusion40 decks60 decks
26%synergy
Meticulous Archive
63%inclusion38 decks60 decks
49%synergy
Sea of Clouds
62%inclusion37 decks60 decks
27%synergy
Shadowy Backstreet
60%inclusion36 decks60 decks
47%synergy
Vault of Champions
60%inclusion36 decks60 decks
28%synergy
Morphic Pool
57%inclusion34 decks60 decks
23%synergy
Exotic Orchard
53%inclusion32 decks60 decks
-6%synergy
Misty Rainforest
52%inclusion31 decks60 decks
41%synergy
Arid Mesa
48%inclusion29 decks60 decks
39%synergy
Windswept Heath
45%inclusion27 decks60 decks
36%synergy
Mana Confluence
45%inclusion27 decks60 decks
31%synergy
Scalding Tarn
45%inclusion27 decks60 decks
34%synergy
City of Brass
42%inclusion25 decks60 decks
26%synergy
Bloodstained Mire
42%inclusion25 decks60 decks
31%synergy
Verdant Catacombs
40%inclusion24 decks60 decks
30%synergy
Floodfarm Verge
37%inclusion22 decks60 decks
26%synergy
Sink into Stupor
37%inclusion22 decks60 decks
24%synergy
Caves of Koilos
33%inclusion20 decks60 decks
-2%synergy
Underground River
32%inclusion19 decks60 decks
-3%synergy
Adarkar Wastes
32%inclusion19 decks60 decks
-1%synergy
Prismatic Vista
28%inclusion17 decks60 decks
24%synergy
Gloomlake Verge
28%inclusion17 decks60 decks
17%synergy
Arcane Sanctum
27%inclusion16 decks60 decks
-27%synergy
Glacial Fortress
20%inclusion12 decks60 decks
-23%synergy
Witch Enchanter
20%inclusion12 decks60 decks
13%synergy
Fell the Profane
18%inclusion11 decks60 decks
9%synergy
Bleachbone Verge
18%inclusion11 decks60 decks
10%synergy
Isolated Chapel
18%inclusion11 decks60 decks
-24%synergy
Drowned Catacomb
18%inclusion11 decks60 decks
-20%synergy
Gemstone Caverns
17%inclusion10 decks60 decks
9%synergy
Valgavoth's Lair
15%inclusion9 decks60 decks
12%synergy
Deserted Beach
15%inclusion9 decks60 decks
-6%synergy
Shipwreck Marsh
13%inclusion8 decks60 decks
-7%synergy
Reflecting Pool
13%inclusion8 decks60 decks
5%synergy
Boggart Trawler
13%inclusion8 decks60 decks
10%synergy
Shattered Sanctum
13%inclusion8 decks60 decks
-4%synergy
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