The Master of Keys (Commander) - Expensive Upgraded

The Master of Keys
Rank #300
52decks
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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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Utility Lands
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Changing Loyalty
14%inclusion1 decks7 decks
14%synergy
Eiganjo Dynastorian
14%inclusion1 decks7 decks
13%synergy
Turbulent Moor
14%inclusion1 decks7 decks
12%synergy
Does Machines
4.5%inclusion1 decks22 decks
4%synergy
High Synergy Cards
Animate Dead
85%inclusion44 decks52 decks
75%synergy
Ripples of Undeath
75%inclusion39 decks52 decks
72%synergy
Necromancy
73%inclusion38 decks52 decks
69%synergy
Inquisitive Glimmer
69%inclusion36 decks52 decks
62%synergy
Dance of the Dead
62%inclusion32 decks52 decks
59%synergy
Dress Down
60%inclusion31 decks52 decks
57%synergy
Amphibian Downpour
58%inclusion30 decks52 decks
53%synergy
Sevinne's Reclamation
60%inclusion31 decks52 decks
51%synergy
Entity Tracker
56%inclusion29 decks52 decks
50%synergy
Entomb
54%inclusion28 decks52 decks
47%synergy
Top Cards
Mystic Remora
63%inclusion33 decks52 decks
43%synergy
Propaganda
58%inclusion30 decks52 decks
29%synergy
Swords to Plowshares
54%inclusion28 decks52 decks
-14%synergy
Gravebreaker Lamia
48%inclusion25 decks52 decks
47%synergy
Sphere of Safety
48%inclusion25 decks52 decks
39%synergy
Mirrormade
48%inclusion25 decks52 decks
38%synergy
Fear of Impostors
46%inclusion24 decks52 decks
45%synergy
Starfield Mystic
44%inclusion23 decks52 decks
38%synergy
Demon of Fate's Design
44%inclusion23 decks52 decks
39%synergy
Ghostly Prison
44%inclusion23 decks52 decks
22%synergy
Game Changers
Smothering Tithe
54%inclusion28 decks52 decks
23%synergy
Rhystic Study
52%inclusion27 decks52 decks
21%synergy
Gifts Ungiven
19%inclusion10 decks52 decks
17%synergy
Serra's Sanctum
15%inclusion8 decks52 decks
14%synergy
Enlightened Tutor
15%inclusion8 decks52 decks
-4%synergy
Demonic Tutor
15%inclusion8 decks52 decks
-5%synergy
The One Ring
13%inclusion7 decks52 decks
1%synergy
Farewell
13%inclusion7 decks52 decks
1%synergy
Intuition
12%inclusion6 decks52 decks
10%synergy
Necropotence
12%inclusion6 decks52 decks
5%synergy
Creatures
Mesa Enchantress
42%inclusion22 decks52 decks
34%synergy
Scrabbling Skullcrab
40%inclusion21 decks52 decks
39%synergy
Zur the Enchanter
40%inclusion21 decks52 decks
35%synergy
Overlord of the Balemurk
37%inclusion19 decks52 decks
35%synergy
Overlord of the Floodpits
33%inclusion17 decks52 decks
29%synergy
Esper Sentinel
33%inclusion17 decks52 decks
5%synergy
Fear of Sleep Paralysis
33%inclusion17 decks52 decks
28%synergy
Ondu Spiritdancer
31%inclusion16 decks52 decks
25%synergy
Zur, Eternal Schemer
29%inclusion15 decks52 decks
26%synergy
Hedron Crab
29%inclusion15 decks52 decks
28%synergy
Victor, Valgavoth's Seneschal
27%inclusion14 decks52 decks
25%synergy
Abdel Adrian, Gorion's Ward
27%inclusion14 decks52 decks
25%synergy
Lotho, Corrupt Shirriff
23%inclusion12 decks52 decks
6%synergy
Doomwake Giant
23%inclusion12 decks52 decks
17%synergy
Hullbreaker Horror
23%inclusion12 decks52 decks
17%synergy
Enduring Curiosity
21%inclusion11 decks52 decks
13%synergy
Ghostly Dancers
19%inclusion10 decks52 decks
17%synergy
Witch Enchanter
17%inclusion9 decks52 decks
10%synergy
Displacer Kitten
17%inclusion9 decks52 decks
10%synergy
Sage of Mysteries
17%inclusion9 decks52 decks
17%synergy
Silent Hallcreeper
17%inclusion9 decks52 decks
13%synergy
Lurrus of the Dream-Den
17%inclusion9 decks52 decks
16%synergy
Grand Abolisher
17%inclusion9 decks52 decks
3%synergy
Ledger Shredder
17%inclusion9 decks52 decks
9%synergy
Psychic Frog
17%inclusion9 decks52 decks
10%synergy
Grim Guardian
15%inclusion8 decks52 decks
13%synergy
Aminatou, Veil Piercer
13%inclusion7 decks52 decks
12%synergy
Valgavoth, Terror Eater
13%inclusion7 decks52 decks
10%synergy
Overlord of the Mistmoors
13%inclusion7 decks52 decks
11%synergy
Stenn, Paranoid Partisan
12%inclusion6 decks52 decks
10%synergy
Valley Floodcaller
12%inclusion6 decks52 decks
8%synergy
Leonin Relic-Warder
12%inclusion6 decks52 decks
11%synergy
Angel of Suffering
12%inclusion6 decks52 decks
11%synergy
Laboratory Maniac
12%inclusion6 decks52 decks
8%synergy
Heliod, the Radiant Dawn
12%inclusion6 decks52 decks
8%synergy
Boggart Trawler
12%inclusion6 decks52 decks
8%synergy
Sun Titan
12%inclusion6 decks52 decks
3%synergy
Voice of Victory
10%inclusion5 decks48 decks
2%synergy
Archon of Sun's Grace
10%inclusion5 decks52 decks
5%synergy
Moon-Blessed Cleric
10%inclusion5 decks52 decks
5%synergy
Hydroelectric Specimen
10%inclusion5 decks52 decks
7%synergy
Ghostly Pilferer
10%inclusion5 decks52 decks
2%synergy
Summon: Yojimbo
9.1%inclusion4 decks44 decks
8%synergy
Thassa's Oracle
7.7%inclusion4 decks52 decks
-1%synergy
Doom Whisperer
7.7%inclusion4 decks52 decks
6%synergy
Soaring Lightbringer
7.7%inclusion4 decks52 decks
3%synergy
Talion, the Kindly Lord
7.7%inclusion4 decks52 decks
0%synergy
Neerdiv, Devious Diver
7.7%inclusion4 decks52 decks
8%synergy
Toxrill, the Corrosive
7.7%inclusion4 decks52 decks
5%synergy
Mirror-Mad Phantasm
7.7%inclusion4 decks52 decks
8%synergy
Instants
Mana Drain
42%inclusion22 decks52 decks
25%synergy
Swan Song
38%inclusion20 decks52 decks
19%synergy
An Offer You Can't Refuse
37%inclusion19 decks52 decks
9%synergy
Dark Ritual
37%inclusion19 decks52 decks
17%synergy
Sink into Stupor
35%inclusion18 decks52 decks
22%synergy
Counterspell
33%inclusion17 decks52 decks
-9%synergy
Arcane Denial
31%inclusion16 decks52 decks
11%synergy
Path to Exile
23%inclusion12 decks52 decks
-19%synergy
Dovin's Veto
19%inclusion10 decks52 decks
-7%synergy
Fell the Profane
17%inclusion9 decks52 decks
8%synergy
Cabal Ritual
17%inclusion9 decks52 decks
14%synergy
Void Rend
15%inclusion8 decks52 decks
-19%synergy
Frantic Search
13%inclusion7 decks52 decks
-5%synergy
Darkblast
12%inclusion6 decks52 decks
11%synergy
Otherworldly Gaze
12%inclusion6 decks52 decks
9%synergy
Teferi's Protection
10%inclusion5 decks52 decks
-7%synergy
Thirst for Meaning
10%inclusion5 decks52 decks
8%synergy
Strix Serenade
10%inclusion5 decks52 decks
6%synergy
Silence
10%inclusion5 decks52 decks
0%synergy
Cyclonic Rift
10%inclusion5 decks52 decks
-13%synergy
Brain Freeze
7.7%inclusion4 decks52 decks
7%synergy
Negate
7.7%inclusion4 decks52 decks
-9%synergy
Flusterstorm
7.7%inclusion4 decks52 decks
0%synergy
Into the Flood Maw
7.7%inclusion4 decks52 decks
4%synergy
Force of Negation
7.7%inclusion4 decks52 decks
-4%synergy
Anguished Unmaking
7.7%inclusion4 decks52 decks
-18%synergy
Generous Gift
7.7%inclusion4 decks52 decks
-6%synergy
Borne Upon a Wind
7.7%inclusion4 decks52 decks
3%synergy
Fierce Guardianship
7.7%inclusion4 decks52 decks
-13%synergy
Muddle the Mixture
5.8%inclusion3 decks52 decks
2%synergy
Mental Misstep
5.8%inclusion3 decks52 decks
-1%synergy
Tainted Pact
5.8%inclusion3 decks52 decks
-1%synergy
Brainstorm
5.8%inclusion3 decks52 decks
-11%synergy
Chain of Vapor
5.8%inclusion3 decks52 decks
3%synergy
Culling the Weak
5.8%inclusion3 decks52 decks
4%synergy
Perplex
5.8%inclusion3 decks52 decks
4%synergy
Delay
5.8%inclusion3 decks52 decks
4%synergy
Demonic Consultation
5.8%inclusion3 decks52 decks
-2%synergy
Inkshield
5.8%inclusion3 decks52 decks
-4%synergy
Vampiric Tutor
5.8%inclusion3 decks52 decks
-11%synergy
Faithful Mending
5.8%inclusion3 decks52 decks
2%synergy
Waterlogged Teachings
5.8%inclusion3 decks52 decks
1%synergy
Sorceries
Reanimate
31%inclusion16 decks52 decks
15%synergy
Replenish
27%inclusion14 decks52 decks
25%synergy
Glimpse the Unthinkable
25%inclusion13 decks52 decks
25%synergy
Windfall
23%inclusion12 decks52 decks
10%synergy
Redress Fate
23%inclusion12 decks52 decks
18%synergy
Toxic Deluge
21%inclusion11 decks52 decks
2%synergy
Singularity Rupture
21%inclusion8 decks39 decks
18%synergy
Space-Time Anomaly
18%inclusion7 decks38 decks
17%synergy
Supreme Verdict
15%inclusion8 decks52 decks
1%synergy
Damn
13%inclusion7 decks52 decks
-7%synergy
Extinguish All Hope
13%inclusion7 decks52 decks
12%synergy
Resurgent Belief
10%inclusion5 decks52 decks
8%synergy
Lively Dirge
10%inclusion5 decks52 decks
8%synergy
Idyllic Tutor
10%inclusion5 decks52 decks
5%synergy
Beseech the Mirror
10%inclusion5 decks52 decks
6%synergy
Ponder
7.7%inclusion4 decks52 decks
-1%synergy
Diabolic Intent
7.7%inclusion4 decks52 decks
3%synergy
Austere Command
7.7%inclusion4 decks52 decks
-1%synergy
Sea Gate Restoration
7.7%inclusion4 decks52 decks
5%synergy
Buried Alive
7.7%inclusion4 decks52 decks
4%synergy
Scheming Symmetry
7.7%inclusion4 decks52 decks
6%synergy
Dance of the Manse
7.7%inclusion4 decks52 decks
4%synergy
Time Wipe
5.8%inclusion3 decks52 decks
-1%synergy
Agadeem's Awakening
5.8%inclusion3 decks52 decks
4%synergy
Wrath of God
5.8%inclusion3 decks52 decks
2%synergy
Demonic Counsel
5.8%inclusion3 decks52 decks
5%synergy
Blasphemous Edict
5.8%inclusion3 decks52 decks
3%synergy
Night's Whisper
5.8%inclusion3 decks52 decks
3%synergy
Utility Artifacts
Mesmeric Orb
33%inclusion17 decks52 decks
32%synergy
Perpetual Timepiece
12%inclusion6 decks52 decks
11%synergy
Lightning Greaves
12%inclusion6 decks52 decks
-11%synergy
Cloud Key
10%inclusion5 decks52 decks
6%synergy
Crucible of Worlds
10%inclusion5 decks52 decks
9%synergy
Wishclaw Talisman
10%inclusion5 decks52 decks
2%synergy
Wayfarer's Bauble
5.8%inclusion3 decks52 decks
-2%synergy
Swiftfoot Boots
5.8%inclusion3 decks52 decks
-18%synergy
Enchantments
Seal of Cleansing
42%inclusion22 decks52 decks
41%synergy
Blind Obedience
38%inclusion20 decks52 decks
27%synergy
Secret Arcade // Dusty Parlor
38%inclusion20 decks52 decks
34%synergy
The Meathook Massacre
37%inclusion19 decks52 decks
33%synergy
Grasp of Fate
35%inclusion18 decks52 decks
29%synergy
Imprisoned in the Moon
35%inclusion18 decks52 decks
28%synergy
Estrid's Invocation
35%inclusion18 decks52 decks
30%synergy
Out of the Tombs
31%inclusion16 decks52 decks
30%synergy
Greater Auramancy
31%inclusion16 decks52 decks
26%synergy
Stillness in Motion
29%inclusion14 decks48 decks
29%synergy
Cemetery Tampering
29%inclusion15 decks52 decks
28%synergy
Darksteel Mutation
27%inclusion14 decks52 decks
21%synergy
Sigil of the Empty Throne
27%inclusion14 decks52 decks
21%synergy
Seal of Removal
25%inclusion13 decks52 decks
24%synergy
Polluted Cistern // Dim Oubliette
25%inclusion13 decks52 decks
24%synergy
Black Market Connections
25%inclusion13 decks52 decks
10%synergy
Copy Enchantment
23%inclusion12 decks52 decks
18%synergy
The Tale of Tamiyo
23%inclusion12 decks52 decks
23%synergy
Leyline of Anticipation
23%inclusion12 decks52 decks
19%synergy
Tinybones Joins Up
21%inclusion11 decks52 decks
20%synergy
Static Prison
21%inclusion11 decks52 decks
21%synergy
Touch the Spirit Realm
19%inclusion10 decks52 decks
17%synergy
Trouble in Pairs
19%inclusion10 decks52 decks
14%synergy
Authority of the Consuls
17%inclusion9 decks52 decks
5%synergy
Out of Time
17%inclusion9 decks52 decks
16%synergy
Starfield of Nyx
17%inclusion9 decks52 decks
13%synergy
Solitary Confinement
17%inclusion9 decks52 decks
15%synergy
Sheltered by Ghosts
17%inclusion9 decks52 decks
15%synergy
Mirror Room // Fractured Realm
15%inclusion8 decks52 decks
13%synergy
Aura of Silence
15%inclusion8 decks52 decks
12%synergy
Defiled Crypt // Cadaver Lab
15%inclusion8 decks52 decks
15%synergy
Court of Cunning
13%inclusion7 decks52 decks
12%synergy
Cacophony Unleashed
13%inclusion7 decks52 decks
12%synergy
Extravagant Replication
13%inclusion7 decks52 decks
8%synergy
Funeral Room // Awakening Hall
13%inclusion7 decks52 decks
13%synergy
Monologue Tax
13%inclusion7 decks52 decks
7%synergy
Bottomless Pool // Locker Room
13%inclusion7 decks52 decks
12%synergy
Land Tax
13%inclusion7 decks52 decks
7%synergy
Shark Typhoon
13%inclusion7 decks52 decks
8%synergy
All That Glitters
13%inclusion7 decks52 decks
5%synergy
Dazzling Theater // Prop Room
13%inclusion7 decks52 decks
12%synergy
Chakra Meditation
13%inclusion4 decks31 decks
13%synergy
Chronic Flooding
12%inclusion6 decks52 decks
11%synergy
Seal of Doom
12%inclusion6 decks52 decks
11%synergy
Copy Artifact
12%inclusion6 decks52 decks
10%synergy
Restricted Office // Lecture Hall
12%inclusion6 decks52 decks
9%synergy
Hallowed Haunting
12%inclusion6 decks52 decks
9%synergy
Phyrexian Arena
12%inclusion6 decks52 decks
-3%synergy
Timely Ward
12%inclusion6 decks52 decks
7%synergy
No Mercy
12%inclusion6 decks52 decks
9%synergy
Planeswalkers
Teferi, Time Raveler
12%inclusion6 decks52 decks
3%synergy
Ashiok, Dream Render
10%inclusion5 decks52 decks
8%synergy
Utility Lands
Hall of Heliod's Generosity
46%inclusion24 decks52 decks
33%synergy
Otawara, Soaring City
46%inclusion24 decks52 decks
27%synergy
Takenuma, Abandoned Mire
27%inclusion14 decks52 decks
21%synergy
Cephalid Coliseum
27%inclusion14 decks52 decks
23%synergy
Bojuka Bog
25%inclusion13 decks52 decks
-2%synergy
Urza's Saga
23%inclusion12 decks52 decks
11%synergy
Urborg, Tomb of Yawgmoth
21%inclusion11 decks52 decks
8%synergy
Reliquary Tower
15%inclusion8 decks52 decks
-19%synergy
Mystic Sanctuary
12%inclusion6 decks52 decks
8%synergy
Ancient Tomb
10%inclusion5 decks52 decks
-3%synergy
Eiganjo, Seat of the Empire
10%inclusion5 decks52 decks
5%synergy
Ancient Den
5.8%inclusion3 decks52 decks
-3%synergy
Vault of Whispers
5.8%inclusion3 decks52 decks
-3%synergy
Minamo, School at Water's Edge
5.8%inclusion3 decks52 decks
2%synergy
Spymaster's Vault
5.8%inclusion3 decks52 decks
3%synergy
Seat of the Synod
5.8%inclusion3 decks52 decks
-3%synergy
Geier Reach Sanitarium
5.8%inclusion3 decks52 decks
2%synergy
Mana Artifacts
Sol Ring
94%inclusion49 decks52 decks
4%synergy
Arcane Signet
81%inclusion42 decks52 decks
-7%synergy
Talisman of Progress
54%inclusion28 decks52 decks
10%synergy
Talisman of Dominance
50%inclusion26 decks52 decks
0%synergy
Talisman of Hierarchy
48%inclusion25 decks52 decks
4%synergy
Fellwar Stone
40%inclusion21 decks52 decks
7%synergy
Azorius Signet
21%inclusion11 decks52 decks
-9%synergy
Lotus Petal
17%inclusion9 decks52 decks
7%synergy
Dimir Signet
17%inclusion9 decks52 decks
-13%synergy
Orzhov Signet
17%inclusion9 decks52 decks
-15%synergy
Mox Opal
10%inclusion5 decks52 decks
1%synergy
Mox Amber
7.7%inclusion4 decks52 decks
2%synergy
Commander's Sphere
5.8%inclusion3 decks52 decks
-12%synergy
Mana Vault
5.8%inclusion3 decks52 decks
-3%synergy
Lands
Command Tower
100%inclusion52 decks52 decks
7%synergy
Underground Sea
98%inclusion51 decks52 decks
82%synergy
Tundra
96%inclusion50 decks52 decks
80%synergy
Scrubland
94%inclusion49 decks52 decks
78%synergy
Hallowed Fountain
94%inclusion49 decks52 decks
44%synergy
Watery Grave
94%inclusion49 decks52 decks
43%synergy
Godless Shrine
92%inclusion48 decks52 decks
41%synergy
Polluted Delta
90%inclusion47 decks52 decks
52%synergy
Marsh Flats
88%inclusion46 decks52 decks
52%synergy
Flooded Strand
88%inclusion46 decks52 decks
50%synergy
Swamp
85%inclusion44 decks52 decks
-7%synergy
Island
85%inclusion44 decks52 decks
-8%synergy
Plains
83%inclusion43 decks52 decks
-9%synergy
Undercity Sewers
69%inclusion36 decks52 decks
55%synergy
Raffine's Tower
69%inclusion36 decks52 decks
28%synergy
Sea of Clouds
69%inclusion36 decks52 decks
34%synergy
Morphic Pool
65%inclusion34 decks52 decks
32%synergy
Vault of Champions
65%inclusion34 decks52 decks
33%synergy
Meticulous Archive
63%inclusion33 decks52 decks
50%synergy
Shadowy Backstreet
58%inclusion30 decks52 decks
45%synergy
Exotic Orchard
56%inclusion29 decks52 decks
-3%synergy
Misty Rainforest
46%inclusion24 decks52 decks
35%synergy
Arid Mesa
42%inclusion22 decks52 decks
33%synergy
Mana Confluence
42%inclusion22 decks52 decks
29%synergy
Floodfarm Verge
40%inclusion21 decks52 decks
29%synergy
City of Brass
40%inclusion21 decks52 decks
25%synergy
Windswept Heath
38%inclusion20 decks52 decks
29%synergy
Scalding Tarn
38%inclusion20 decks52 decks
28%synergy
Bloodstained Mire
37%inclusion19 decks52 decks
26%synergy
Verdant Catacombs
35%inclusion18 decks52 decks
25%synergy
Sink into Stupor
35%inclusion18 decks52 decks
22%synergy
Caves of Koilos
33%inclusion17 decks52 decks
-3%synergy
Underground River
33%inclusion17 decks52 decks
-2%synergy
Gloomlake Verge
33%inclusion17 decks52 decks
22%synergy
Prismatic Vista
31%inclusion16 decks52 decks
27%synergy
Arcane Sanctum
31%inclusion16 decks52 decks
-23%synergy
Adarkar Wastes
31%inclusion16 decks52 decks
-1%synergy
Isolated Chapel
21%inclusion11 decks52 decks
-20%synergy
Glacial Fortress
19%inclusion10 decks52 decks
-23%synergy
Drowned Catacomb
19%inclusion10 decks52 decks
-18%synergy
Witch Enchanter
17%inclusion9 decks52 decks
10%synergy
Fell the Profane
17%inclusion9 decks52 decks
8%synergy
Bleachbone Verge
17%inclusion9 decks52 decks
9%synergy
Azorius Chancery
15%inclusion8 decks52 decks
2%synergy
Valgavoth's Lair
15%inclusion8 decks52 decks
13%synergy
Deserted Beach
15%inclusion8 decks52 decks
-5%synergy
Shipwreck Marsh
13%inclusion7 decks52 decks
-7%synergy
Shattered Sanctum
13%inclusion7 decks52 decks
-3%synergy
Brightclimb Pathway
12%inclusion6 decks52 decks
5%synergy
Dimir Aqueduct
12%inclusion6 decks52 decks
-2%synergy
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