The Master of Keys (Commander) - Optimized

The Master of Keys
Rank #300
303decks
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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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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
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Exhibition Tidecaller
5.9%inclusion2 decks34 decks
6%synergy
Eiganjo Dynastorian
5.9%inclusion2 decks34 decks
5%synergy
Umbral Expanse
2.9%inclusion1 decks34 decks
2%synergy
Shredder's Technique
1.4%inclusion1 decks70 decks
-1%synergy
High Synergy Cards
Animate Dead
77%inclusion233 decks303 decks
67%synergy
Ripples of Undeath
68%inclusion205 decks303 decks
65%synergy
Necromancy
68%inclusion205 decks303 decks
63%synergy
Dress Down
63%inclusion191 decks303 decks
61%synergy
Entomb
58%inclusion175 decks303 decks
51%synergy
Abdel Adrian, Gorion's Ward
52%inclusion159 decks303 decks
51%synergy
Inquisitive Glimmer
58%inclusion175 decks303 decks
51%synergy
Mystic Remora
71%inclusion214 decks303 decks
50%synergy
Sevinne's Reclamation
56%inclusion171 decks303 decks
48%synergy
Entity Tracker
52%inclusion157 decks303 decks
46%synergy
Top Cards
Swords to Plowshares
64%inclusion194 decks303 decks
-4%synergy
Mesa Enchantress
53%inclusion160 decks303 decks
44%synergy
Mirrormade
49%inclusion148 decks303 decks
39%synergy
Starfield Mystic
47%inclusion142 decks303 decks
40%synergy
Gravebreaker Lamia
45%inclusion137 decks303 decks
44%synergy
Dance of the Dead
45%inclusion136 decks303 decks
43%synergy
Scrabbling Skullcrab
44%inclusion133 decks303 decks
43%synergy
Blind Obedience
43%inclusion131 decks303 decks
31%synergy
Demon of Fate's Design
43%inclusion131 decks303 decks
38%synergy
Amphibian Downpour
43%inclusion130 decks303 decks
38%synergy
Game Changers
Smothering Tithe
64%inclusion193 decks303 decks
33%synergy
Rhystic Study
63%inclusion191 decks303 decks
32%synergy
Enlightened Tutor
51%inclusion154 decks303 decks
32%synergy
Demonic Tutor
44%inclusion134 decks303 decks
24%synergy
Vampiric Tutor
38%inclusion116 decks303 decks
21%synergy
Thassa's Oracle
34%inclusion102 decks303 decks
25%synergy
Cyclonic Rift
32%inclusion97 decks303 decks
9%synergy
Fierce Guardianship
30%inclusion91 decks303 decks
10%synergy
Necropotence
30%inclusion91 decks303 decks
24%synergy
Ancient Tomb
28%inclusion85 decks303 decks
15%synergy
Creatures
Overlord of the Balemurk
40%inclusion120 decks303 decks
38%synergy
Esper Sentinel
38%inclusion114 decks303 decks
10%synergy
Ondu Spiritdancer
37%inclusion111 decks303 decks
30%synergy
Overlord of the Floodpits
36%inclusion110 decks303 decks
33%synergy
Doomwake Giant
36%inclusion108 decks303 decks
30%synergy
Fear of Sleep Paralysis
35%inclusion106 decks303 decks
30%synergy
Fear of Impostors
32%inclusion96 decks303 decks
30%synergy
Lotho, Corrupt Shirriff
31%inclusion95 decks303 decks
14%synergy
Zur, Eternal Schemer
31%inclusion94 decks303 decks
28%synergy
Grand Abolisher
29%inclusion89 decks303 decks
15%synergy
Victor, Valgavoth's Seneschal
28%inclusion84 decks303 decks
26%synergy
Zur the Enchanter
23%inclusion69 decks303 decks
18%synergy
Hullbreaker Horror
22%inclusion68 decks303 decks
16%synergy
Orcish Bowmasters
22%inclusion67 decks303 decks
12%synergy
Grim Guardian
22%inclusion66 decks303 decks
19%synergy
Heliod, the Radiant Dawn
21%inclusion65 decks303 decks
18%synergy
Displacer Kitten
21%inclusion63 decks303 decks
14%synergy
Valley Floodcaller
20%inclusion62 decks303 decks
17%synergy
Moon-Blessed Cleric
19%inclusion59 decks303 decks
15%synergy
Ledger Shredder
19%inclusion59 decks303 decks
11%synergy
Ghostly Dancers
18%inclusion56 decks303 decks
16%synergy
Soaring Lightbringer
18%inclusion55 decks303 decks
14%synergy
Silent Hallcreeper
17%inclusion53 decks303 decks
13%synergy
Lurrus of the Dream-Den
17%inclusion53 decks303 decks
16%synergy
Enduring Curiosity
17%inclusion52 decks303 decks
9%synergy
Aminatou, Veil Piercer
15%inclusion44 decks303 decks
13%synergy
Hedron Crab
15%inclusion44 decks303 decks
14%synergy
Balemurk Leech
14%inclusion42 decks303 decks
13%synergy
Wan Shi Tong, Librarian
13%inclusion17 decks127 decks
8%synergy
Opposition Agent
13%inclusion39 decks303 decks
5%synergy
Ranger-Captain of Eos
13%inclusion39 decks303 decks
7%synergy
Archon of Sun's Grace
12%inclusion37 decks303 decks
8%synergy
Gremlin Tamer
12%inclusion37 decks303 decks
11%synergy
Psychic Frog
12%inclusion37 decks303 decks
5%synergy
Talion, the Kindly Lord
12%inclusion36 decks303 decks
4%synergy
Voice of Victory
11%inclusion29 decks256 decks
3%synergy
Archetype of Imagination
11%inclusion34 decks303 decks
7%synergy
Mindwrack Harpy
11%inclusion32 decks303 decks
10%synergy
Faerie Mastermind
10%inclusion31 decks303 decks
1%synergy
Drannith Magistrate
10%inclusion31 decks303 decks
3%synergy
Skullsnap Nuisance
10%inclusion29 decks303 decks
9%synergy
Mockingbird
10%inclusion29 decks303 decks
5%synergy
Overlord of the Mistmoors
10%inclusion29 decks303 decks
8%synergy
Ancient Cellarspawn
9.2%inclusion28 decks303 decks
6%synergy
Leonin Relic-Warder
9.2%inclusion28 decks303 decks
9%synergy
Archivist of Oghma
8.9%inclusion27 decks303 decks
2%synergy
Athreos, Shroud-Veiled
7.9%inclusion24 decks303 decks
4%synergy
Nightmare Shepherd
7.9%inclusion24 decks303 decks
6%synergy
Sage of Mysteries
7.6%inclusion23 decks303 decks
7%synergy
Spirited Companion
7.6%inclusion23 decks303 decks
6%synergy
Instants
Dark Ritual
43%inclusion129 decks303 decks
23%synergy
An Offer You Can't Refuse
42%inclusion128 decks303 decks
15%synergy
Path to Exile
33%inclusion101 decks303 decks
-9%synergy
Swan Song
32%inclusion97 decks303 decks
12%synergy
Counterspell
30%inclusion91 decks303 decks
-12%synergy
Arcane Denial
28%inclusion85 decks303 decks
8%synergy
Silence
26%inclusion79 decks303 decks
16%synergy
Mana Drain
26%inclusion78 decks303 decks
8%synergy
Force of Will
24%inclusion74 decks303 decks
12%synergy
Mystical Tutor
24%inclusion74 decks303 decks
14%synergy
Force of Negation
21%inclusion64 decks303 decks
9%synergy
Flusterstorm
21%inclusion63 decks303 decks
13%synergy
Demonic Consultation
20%inclusion62 decks303 decks
13%synergy
Dovin's Veto
20%inclusion61 decks303 decks
-6%synergy
Gifts Ungiven
19%inclusion58 decks303 decks
17%synergy
Sink into Stupor
18%inclusion56 decks303 decks
6%synergy
Intuition
17%inclusion53 decks303 decks
16%synergy
Tainted Pact
16%inclusion48 decks303 decks
9%synergy
Borne Upon a Wind
15%inclusion46 decks303 decks
10%synergy
Cabal Ritual
15%inclusion44 decks303 decks
11%synergy
Frantic Search
14%inclusion41 decks303 decks
-5%synergy
Brainstorm
13%inclusion40 decks303 decks
-4%synergy
Teferi's Protection
13%inclusion38 decks303 decks
-4%synergy
Pact of Negation
13%inclusion38 decks303 decks
5%synergy
Mindbreak Trap
12%inclusion37 decks303 decks
6%synergy
Inkshield
12%inclusion37 decks303 decks
3%synergy
Thirst for Meaning
12%inclusion36 decks303 decks
10%synergy
Void Rend
12%inclusion35 decks303 decks
-23%synergy
Mental Misstep
11%inclusion32 decks303 decks
4%synergy
Otherworldly Gaze
11%inclusion32 decks303 decks
8%synergy
Into the Flood Maw
10%inclusion29 decks303 decks
6%synergy
Negate
8.3%inclusion25 decks303 decks
-8%synergy
Anguished Unmaking
8.3%inclusion25 decks303 decks
-17%synergy
Fell the Profane
7.6%inclusion23 decks303 decks
-1%synergy
Muddle the Mixture
6.9%inclusion21 decks303 decks
3%synergy
Chain of Vapor
6.9%inclusion21 decks303 decks
4%synergy
Utter End
6.9%inclusion21 decks303 decks
1%synergy
Deadly Rollick
6.3%inclusion19 decks303 decks
-9%synergy
Ad Nauseam
5.9%inclusion18 decks303 decks
4%synergy
Waterlogged Teachings
5.6%inclusion17 decks303 decks
1%synergy
Sorceries
Reanimate
29%inclusion89 decks303 decks
13%synergy
Windfall
28%inclusion86 decks303 decks
15%synergy
Redress Fate
25%inclusion75 decks303 decks
19%synergy
Toxic Deluge
21%inclusion65 decks303 decks
2%synergy
Glimpse the Unthinkable
13%inclusion39 decks303 decks
12%synergy
Demonic Counsel
13%inclusion39 decks303 decks
12%synergy
Damn
13%inclusion38 decks303 decks
-8%synergy
Lively Dirge
12%inclusion36 decks303 decks
11%synergy
Singularity Rupture
11%inclusion20 decks176 decks
9%synergy
Idyllic Tutor
11%inclusion33 decks303 decks
7%synergy
Extinguish All Hope
11%inclusion32 decks303 decks
9%synergy
Supreme Verdict
10%inclusion31 decks303 decks
-4%synergy
Unmarked Grave
10%inclusion31 decks303 decks
9%synergy
Replenish
10%inclusion31 decks303 decks
9%synergy
Imperial Seal
10%inclusion30 decks303 decks
3%synergy
Resurgent Belief
8.6%inclusion26 decks303 decks
7%synergy
Beseech the Mirror
8.6%inclusion26 decks303 decks
5%synergy
Buried Alive
8.3%inclusion25 decks303 decks
4%synergy
Dance of the Manse
8.3%inclusion25 decks303 decks
5%synergy
Farewell
7.9%inclusion24 decks303 decks
-5%synergy
Time Wipe
6.9%inclusion21 decks303 decks
0%synergy
Ponder
5.9%inclusion18 decks303 decks
-3%synergy
Utility Artifacts
The One Ring
24%inclusion73 decks303 decks
11%synergy
Mesmeric Orb
21%inclusion64 decks303 decks
20%synergy
Wishclaw Talisman
20%inclusion62 decks303 decks
13%synergy
Lightning Greaves
8.9%inclusion27 decks303 decks
-14%synergy
Cloud Key
6.6%inclusion20 decks303 decks
3%synergy
Sensei's Divining Top
5.6%inclusion17 decks303 decks
-4%synergy
Enchantments
Sphere of Safety
41%inclusion124 decks303 decks
32%synergy
Secret Arcade // Dusty Parlor
39%inclusion119 decks303 decks
35%synergy
Propaganda
34%inclusion104 decks303 decks
6%synergy
Ghostly Prison
32%inclusion97 decks303 decks
10%synergy
Seal of Cleansing
31%inclusion95 decks303 decks
30%synergy
The Meathook Massacre
31%inclusion93 decks303 decks
27%synergy
Grasp of Fate
30%inclusion91 decks303 decks
24%synergy
Tinybones Joins Up
28%inclusion86 decks303 decks
27%synergy
Starfield of Nyx
26%inclusion79 decks303 decks
22%synergy
Cemetery Tampering
24%inclusion73 decks303 decks
23%synergy
Sigil of the Empty Throne
23%inclusion71 decks303 decks
18%synergy
Estrid's Invocation
23%inclusion70 decks303 decks
18%synergy
Touch the Spirit Realm
22%inclusion68 decks303 decks
20%synergy
Monologue Tax
22%inclusion67 decks303 decks
16%synergy
Greater Auramancy
19%inclusion59 decks303 decks
15%synergy
Static Prison
18%inclusion56 decks303 decks
18%synergy
Seal of Removal
18%inclusion56 decks303 decks
18%synergy
Cacophony Unleashed
18%inclusion55 decks303 decks
16%synergy
Darksteel Mutation
18%inclusion54 decks303 decks
12%synergy
Black Market Connections
18%inclusion54 decks303 decks
3%synergy
Leyline of Anticipation
16%inclusion49 decks303 decks
12%synergy
Out of the Tombs
16%inclusion48 decks303 decks
15%synergy
Extravagant Replication
15%inclusion44 decks303 decks
9%synergy
Shark Typhoon
15%inclusion44 decks303 decks
9%synergy
Phyrexian Arena
14%inclusion43 decks303 decks
0%synergy
Defiled Crypt // Cadaver Lab
14%inclusion43 decks303 decks
13%synergy
Trouble in Pairs
14%inclusion42 decks303 decks
9%synergy
Timely Ward
13%inclusion40 decks303 decks
8%synergy
Polluted Cistern // Dim Oubliette
13%inclusion39 decks303 decks
12%synergy
Stillness in Motion
13%inclusion32 decks249 decks
12%synergy
The Tale of Tamiyo
12%inclusion37 decks303 decks
12%synergy
Copy Enchantment
12%inclusion37 decks303 decks
7%synergy
Sheltered by Ghosts
12%inclusion36 decks303 decks
9%synergy
Authority of the Consuls
11%inclusion34 decks303 decks
-2%synergy
Mirror Room // Fractured Realm
11%inclusion34 decks303 decks
9%synergy
Bottomless Pool // Locker Room
11%inclusion33 decks303 decks
9%synergy
Enchanted Evening
11%inclusion33 decks303 decks
9%synergy
Restricted Office // Lecture Hall
11%inclusion32 decks303 decks
9%synergy
Land Tax
11%inclusion32 decks303 decks
5%synergy
The Eldest Reborn
10%inclusion31 decks303 decks
8%synergy
Aura of Silence
10%inclusion31 decks303 decks
7%synergy
Hallowed Haunting
10%inclusion31 decks303 decks
8%synergy
One with the Multiverse
10%inclusion30 decks303 decks
5%synergy
Central Elevator // Promising Stairs
10%inclusion30 decks303 decks
9%synergy
Ethereal Armor
10%inclusion30 decks303 decks
5%synergy
Court of Cunning
10%inclusion29 decks303 decks
9%synergy
Oubliette
10%inclusion29 decks303 decks
8%synergy
Nowhere to Run
9.2%inclusion28 decks303 decks
8%synergy
Imprisoned in the Moon
8.9%inclusion27 decks303 decks
2%synergy
Cramped Vents // Access Maze
8.6%inclusion26 decks303 decks
6%synergy
Planeswalkers
Teferi, Time Raveler
21%inclusion63 decks303 decks
13%synergy
Utility Lands
Hall of Heliod's Generosity
55%inclusion166 decks303 decks
42%synergy
Otawara, Soaring City
37%inclusion113 decks303 decks
18%synergy
Bojuka Bog
33%inclusion100 decks303 decks
6%synergy
Takenuma, Abandoned Mire
21%inclusion64 decks303 decks
15%synergy
Urza's Saga
19%inclusion57 decks303 decks
7%synergy
Serra's Sanctum
18%inclusion55 decks303 decks
16%synergy
Urborg, Tomb of Yawgmoth
15%inclusion44 decks303 decks
1%synergy
Cephalid Coliseum
14%inclusion41 decks303 decks
10%synergy
Emergence Zone
13%inclusion40 decks303 decks
11%synergy
Reliquary Tower
13%inclusion39 decks303 decks
-21%synergy
Halimar Depths
10%inclusion30 decks303 decks
5%synergy
Minamo, School at Water's Edge
6.6%inclusion20 decks303 decks
3%synergy
Eiganjo, Seat of the Empire
5.6%inclusion17 decks303 decks
1%synergy
Mana Artifacts
Sol Ring
94%inclusion285 decks303 decks
4%synergy
Arcane Signet
92%inclusion280 decks303 decks
5%synergy
Talisman of Dominance
55%inclusion166 decks303 decks
5%synergy
Talisman of Hierarchy
50%inclusion153 decks303 decks
6%synergy
Talisman of Progress
50%inclusion152 decks303 decks
6%synergy
Fellwar Stone
42%inclusion127 decks303 decks
9%synergy
Azorius Signet
36%inclusion109 decks303 decks
6%synergy
Orzhov Signet
33%inclusion99 decks303 decks
0%synergy
Lotus Petal
25%inclusion77 decks303 decks
15%synergy
Dimir Signet
24%inclusion72 decks303 decks
-7%synergy
Mana Vault
23%inclusion70 decks303 decks
14%synergy
Chrome Mox
19%inclusion59 decks303 decks
10%synergy
Mind Stone
12%inclusion36 decks303 decks
0%synergy
Mox Opal
11%inclusion34 decks303 decks
3%synergy
Mox Amber
11%inclusion33 decks303 decks
5%synergy
Mox Diamond
10%inclusion31 decks303 decks
3%synergy
Lion's Eye Diamond
8.6%inclusion26 decks303 decks
7%synergy
Commander's Sphere
7.6%inclusion23 decks303 decks
-10%synergy
Thought Vessel
6.6%inclusion20 decks303 decks
-18%synergy
Lands
Command Tower
95%inclusion287 decks303 decks
2%synergy
Island
90%inclusion273 decks303 decks
-3%synergy
Swamp
89%inclusion271 decks303 decks
-2%synergy
Plains
88%inclusion268 decks303 decks
-3%synergy
Hallowed Fountain
68%inclusion206 decks303 decks
17%synergy
Watery Grave
67%inclusion204 decks303 decks
16%synergy
Godless Shrine
66%inclusion199 decks303 decks
14%synergy
Flooded Strand
62%inclusion187 decks303 decks
23%synergy
Polluted Delta
60%inclusion183 decks303 decks
23%synergy
Marsh Flats
57%inclusion174 decks303 decks
21%synergy
Exotic Orchard
53%inclusion160 decks303 decks
-6%synergy
Raffine's Tower
49%inclusion149 decks303 decks
8%synergy
Caves of Koilos
49%inclusion148 decks303 decks
13%synergy
Underground River
48%inclusion144 decks303 decks
13%synergy
Adarkar Wastes
48%inclusion144 decks303 decks
16%synergy
Sea of Clouds
45%inclusion137 decks303 decks
10%synergy
Morphic Pool
43%inclusion130 decks303 decks
9%synergy
Vault of Champions
42%inclusion127 decks303 decks
10%synergy
Arcane Sanctum
42%inclusion126 decks303 decks
-13%synergy
Undercity Sewers
41%inclusion125 decks303 decks
27%synergy
Glacial Fortress
35%inclusion107 decks303 decks
-7%synergy
Shadowy Backstreet
35%inclusion105 decks303 decks
22%synergy
Meticulous Archive
34%inclusion104 decks303 decks
20%synergy
Isolated Chapel
30%inclusion92 decks303 decks
-11%synergy
City of Brass
28%inclusion84 decks303 decks
13%synergy
Tundra
25%inclusion77 decks303 decks
10%synergy
Underground Sea
24%inclusion74 decks303 decks
9%synergy
Drowned Catacomb
24%inclusion74 decks303 decks
-13%synergy
Scrubland
24%inclusion74 decks303 decks
9%synergy
Floodfarm Verge
24%inclusion73 decks303 decks
13%synergy
Gloomlake Verge
22%inclusion67 decks303 decks
11%synergy
Mana Confluence
22%inclusion67 decks303 decks
8%synergy
Prairie Stream
22%inclusion66 decks303 decks
-19%synergy
Azorius Chancery
21%inclusion65 decks303 decks
8%synergy
Valgavoth's Lair
21%inclusion65 decks303 decks
19%synergy
Bloodstained Mire
21%inclusion64 decks303 decks
10%synergy
Tainted Isle
21%inclusion63 decks303 decks
14%synergy
Dimir Aqueduct
20%inclusion61 decks303 decks
7%synergy
Sunken Hollow
20%inclusion61 decks303 decks
-20%synergy
Tainted Field
19%inclusion59 decks303 decks
13%synergy
Windswept Heath
19%inclusion58 decks303 decks
10%synergy
Orzhov Basilica
19%inclusion58 decks303 decks
4%synergy
Misty Rainforest
19%inclusion57 decks303 decks
8%synergy
Temple of Silence
19%inclusion57 decks303 decks
0%synergy
Verdant Catacombs
18%inclusion56 decks303 decks
9%synergy
Sink into Stupor
18%inclusion56 decks303 decks
6%synergy
Temple of Deceit
18%inclusion55 decks303 decks
1%synergy
Temple of Enlightenment
18%inclusion55 decks303 decks
2%synergy
Scalding Tarn
17%inclusion53 decks303 decks
7%synergy
Arid Mesa
17%inclusion51 decks303 decks
7%synergy
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