The Master of Keys (Commander) - Optimized Midrange

The Master of Keys
Rank #295
6decks
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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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The Queen of Dale
67%inclusion2 decks3 decks
63%synergy
Gleaming Splendor
67%inclusion2 decks3 decks
59%synergy
The Wondrous Wasp
33%inclusion1 decks3 decks
33%synergy
High Synergy Cards
Animate Dead
100%inclusion6 decks6 decks
90%synergy
Ripples of Undeath
83%inclusion5 decks6 decks
81%synergy
Mystic Remora
100%inclusion6 decks6 decks
80%synergy
Blind Obedience
83%inclusion5 decks6 decks
72%synergy
Abdel Adrian, Gorion's Ward
67%inclusion4 decks6 decks
65%synergy
Zur, Eternal Schemer
67%inclusion4 decks6 decks
63%synergy
Necromancy
67%inclusion4 decks6 decks
62%synergy
Amphibian Downpour
67%inclusion4 decks6 decks
62%synergy
Sevinne's Reclamation
67%inclusion4 decks6 decks
58%synergy
Mirrormade
67%inclusion4 decks6 decks
57%synergy
Top Cards
An Offer You Can't Refuse
83%inclusion5 decks6 decks
55%synergy
Swords to Plowshares
83%inclusion5 decks6 decks
16%synergy
Dark Ritual
67%inclusion4 decks6 decks
46%synergy
Mana Drain
67%inclusion4 decks6 decks
49%synergy
Swan Song
67%inclusion4 decks6 decks
46%synergy
Reanimate
67%inclusion4 decks6 decks
50%synergy
Game Changers
Rhystic Study
100%inclusion6 decks6 decks
70%synergy
Smothering Tithe
100%inclusion6 decks6 decks
70%synergy
Cyclonic Rift
83%inclusion5 decks6 decks
61%synergy
Enlightened Tutor
83%inclusion5 decks6 decks
65%synergy
Necropotence
67%inclusion4 decks6 decks
60%synergy
Fierce Guardianship
67%inclusion4 decks6 decks
46%synergy
Demonic Tutor
67%inclusion4 decks6 decks
47%synergy
Chrome Mox
67%inclusion4 decks6 decks
58%synergy
Opposition Agent
50%inclusion3 decks6 decks
42%synergy
Thassa's Oracle
50%inclusion3 decks6 decks
41%synergy
Creatures
Scrabbling Skullcrab
50%inclusion3 decks6 decks
49%synergy
Inquisitive Glimmer
50%inclusion3 decks6 decks
43%synergy
Esper Sentinel
50%inclusion3 decks6 decks
23%synergy
Overlord of the Balemurk
50%inclusion3 decks6 decks
48%synergy
Grand Abolisher
50%inclusion3 decks6 decks
35%synergy
Entity Tracker
50%inclusion3 decks6 decks
44%synergy
Orcish Bowmasters
50%inclusion3 decks6 decks
40%synergy
Wan Shi Tong, Librarian
40%inclusion2 decks5 decks
35%synergy
Lotho, Corrupt Shirriff
33%inclusion2 decks6 decks
16%synergy
Starfield Mystic
33%inclusion2 decks6 decks
27%synergy
Overlord of the Floodpits
33%inclusion2 decks6 decks
30%synergy
Valley Floodcaller
33%inclusion2 decks6 decks
30%synergy
Kambal, Consul of Allocation
33%inclusion2 decks6 decks
24%synergy
Demon of Fate's Design
33%inclusion2 decks6 decks
28%synergy
Fear of Impostors
33%inclusion2 decks6 decks
32%synergy
Silent Hallcreeper
33%inclusion2 decks6 decks
29%synergy
Mesa Enchantress
33%inclusion2 decks6 decks
25%synergy
Enduring Curiosity
33%inclusion2 decks6 decks
25%synergy
Faerie Mastermind
33%inclusion2 decks6 decks
23%synergy
Drannith Magistrate
33%inclusion2 decks6 decks
26%synergy
Doomwake Giant
33%inclusion2 decks6 decks
28%synergy
Dauthi Voidwalker
33%inclusion2 decks6 decks
28%synergy
Tataru Taru
20%inclusion1 decks5 decks
11%synergy
Mai, Scornful Striker
20%inclusion1 decks5 decks
18%synergy
Solemn Simulacrum
17%inclusion1 decks6 decks
4%synergy
Starnheim Courser
17%inclusion1 decks6 decks
13%synergy
Witch Enchanter
17%inclusion1 decks6 decks
9%synergy
Displacer Kitten
17%inclusion1 decks6 decks
10%synergy
Dark Confidant
17%inclusion1 decks6 decks
15%synergy
Delney, Streetwise Lookout
17%inclusion1 decks6 decks
9%synergy
Gravebreaker Lamia
17%inclusion1 decks6 decks
16%synergy
Sheoldred, the Apocalypse
17%inclusion1 decks6 decks
7%synergy
Lurrus of the Dream-Den
17%inclusion1 decks6 decks
15%synergy
Charismatic Conqueror
17%inclusion1 decks6 decks
15%synergy
Archon of Sun's Grace
17%inclusion1 decks6 decks
12%synergy
Walking Ballista
17%inclusion1 decks6 decks
14%synergy
Fear of Surveillance
17%inclusion1 decks6 decks
16%synergy
Kambal, Profiteering Mayor
17%inclusion1 decks6 decks
12%synergy
Sage of Mysteries
17%inclusion1 decks6 decks
16%synergy
Heliod, Sun-Crowned
17%inclusion1 decks6 decks
13%synergy
Soaring Lightbringer
17%inclusion1 decks6 decks
12%synergy
Hedron Crab
17%inclusion1 decks6 decks
16%synergy
Boggart Trawler
17%inclusion1 decks6 decks
13%synergy
Overlord of the Mistmoors
17%inclusion1 decks6 decks
15%synergy
Leonin Relic-Warder
17%inclusion1 decks6 decks
16%synergy
Victor, Valgavoth's Seneschal
17%inclusion1 decks6 decks
15%synergy
Enduring Tenacity
17%inclusion1 decks6 decks
9%synergy
Skullsnap Nuisance
17%inclusion1 decks6 decks
16%synergy
Spirited Companion
17%inclusion1 decks6 decks
15%synergy
Fear of Sleep Paralysis
17%inclusion1 decks6 decks
12%synergy
Instants
Dovin's Veto
50%inclusion3 decks6 decks
23%synergy
Entomb
50%inclusion3 decks6 decks
43%synergy
Gifts Ungiven
50%inclusion3 decks6 decks
47%synergy
Silence
50%inclusion3 decks6 decks
40%synergy
Force of Will
50%inclusion3 decks6 decks
38%synergy
Vampiric Tutor
50%inclusion3 decks6 decks
34%synergy
Teferi's Protection
33%inclusion2 decks6 decks
17%synergy
Tainted Pact
33%inclusion2 decks6 decks
27%synergy
Thirst for Meaning
33%inclusion2 decks6 decks
32%synergy
Void Rend
33%inclusion2 decks6 decks
-2%synergy
Into the Flood Maw
33%inclusion2 decks6 decks
30%synergy
Demonic Consultation
33%inclusion2 decks6 decks
26%synergy
Force of Negation
33%inclusion2 decks6 decks
22%synergy
Borne Upon a Wind
33%inclusion2 decks6 decks
28%synergy
Fell the Profane
17%inclusion1 decks6 decks
7%synergy
Muddle the Mixture
17%inclusion1 decks6 decks
13%synergy
Frantic Search
17%inclusion1 decks6 decks
-2%synergy
Mental Misstep
17%inclusion1 decks6 decks
10%synergy
Retraction Helix
17%inclusion1 decks6 decks
16%synergy
Brainstorm
17%inclusion1 decks6 decks
0%synergy
Dawn's Truce
17%inclusion1 decks6 decks
12%synergy
Fact or Fiction
17%inclusion1 decks6 decks
13%synergy
Get Lost
17%inclusion1 decks6 decks
15%synergy
Cabal Ritual
17%inclusion1 decks6 decks
13%synergy
Culling the Weak
17%inclusion1 decks6 decks
15%synergy
Darkblast
17%inclusion1 decks6 decks
17%synergy
Angel's Grace
17%inclusion1 decks6 decks
14%synergy
Dispel
17%inclusion1 decks6 decks
14%synergy
Strix Serenade
17%inclusion1 decks6 decks
13%synergy
Flusterstorm
17%inclusion1 decks6 decks
9%synergy
Ad Nauseam
17%inclusion1 decks6 decks
15%synergy
Arcane Denial
17%inclusion1 decks6 decks
-4%synergy
Snap
17%inclusion1 decks6 decks
15%synergy
Narset's Reversal
17%inclusion1 decks6 decks
15%synergy
Path to Exile
17%inclusion1 decks6 decks
-26%synergy
Pact of Negation
17%inclusion1 decks6 decks
9%synergy
Generous Gift
17%inclusion1 decks6 decks
3%synergy
Mystical Tutor
17%inclusion1 decks6 decks
6%synergy
Sorceries
Windfall
33%inclusion2 decks6 decks
20%synergy
Lively Dirge
33%inclusion2 decks6 decks
32%synergy
Redress Fate
33%inclusion2 decks6 decks
28%synergy
Ponder
17%inclusion1 decks6 decks
8%synergy
Supreme Verdict
17%inclusion1 decks6 decks
2%synergy
Resurgent Belief
17%inclusion1 decks6 decks
15%synergy
Imperial Seal
17%inclusion1 decks6 decks
10%synergy
Yawgmoth's Will
17%inclusion1 decks6 decks
15%synergy
Replenish
17%inclusion1 decks6 decks
15%synergy
Glimpse the Unthinkable
17%inclusion1 decks6 decks
16%synergy
Read the Bones
17%inclusion1 decks6 decks
13%synergy
Diabolic Vision
17%inclusion1 decks6 decks
14%synergy
Mnemonic Betrayal
17%inclusion1 decks6 decks
14%synergy
Toxic Deluge
17%inclusion1 decks6 decks
-3%synergy
Aminatou's Augury
17%inclusion1 decks6 decks
15%synergy
Utility Artifacts
Mesmeric Orb
33%inclusion2 decks6 decks
32%synergy
Manifold Key
17%inclusion1 decks6 decks
16%synergy
The One Ring
17%inclusion1 decks6 decks
4%synergy
Wishclaw Talisman
17%inclusion1 decks6 decks
9%synergy
Lightning Greaves
17%inclusion1 decks6 decks
-6%synergy
Enchantments
Touch the Spirit Realm
50%inclusion3 decks6 decks
48%synergy
Authority of the Consuls
50%inclusion3 decks6 decks
36%synergy
Sphere of Safety
50%inclusion3 decks6 decks
41%synergy
Dress Down
50%inclusion3 decks6 decks
48%synergy
Secret Arcade // Dusty Parlor
50%inclusion3 decks6 decks
46%synergy
Greater Auramancy
50%inclusion3 decks6 decks
46%synergy
The Meathook Massacre
33%inclusion2 decks6 decks
30%synergy
Grasp of Fate
33%inclusion2 decks6 decks
27%synergy
Tinybones Joins Up
33%inclusion2 decks6 decks
32%synergy
Cemetery Tampering
33%inclusion2 decks6 decks
33%synergy
Seal of Cleansing
33%inclusion2 decks6 decks
32%synergy
Sheltered by Ghosts
33%inclusion2 decks6 decks
31%synergy
Bloodchief Ascension
33%inclusion2 decks6 decks
27%synergy
Seal of Removal
33%inclusion2 decks6 decks
33%synergy
Mornsong Aria
20%inclusion1 decks5 decks
19%synergy
Darksteel Mutation
17%inclusion1 decks6 decks
11%synergy
Parallax Wave
17%inclusion1 decks6 decks
16%synergy
Founding the Third Path
17%inclusion1 decks6 decks
16%synergy
Dance of the Dead
17%inclusion1 decks6 decks
15%synergy
Scion of Halaster
17%inclusion1 decks6 decks
16%synergy
Metamorphic Alteration
17%inclusion1 decks6 decks
17%synergy
Ringing Strike Mastery
17%inclusion1 decks6 decks
17%synergy
Extravagant Replication
17%inclusion1 decks6 decks
12%synergy
The Eldest Reborn
17%inclusion1 decks6 decks
14%synergy
Out of the Tombs
17%inclusion1 decks6 decks
16%synergy
Grievous Wound
17%inclusion1 decks6 decks
16%synergy
Life Insurance
17%inclusion1 decks6 decks
15%synergy
Rule of Law
17%inclusion1 decks6 decks
14%synergy
Opalescence
17%inclusion1 decks6 decks
16%synergy
Hopeless Nightmare
17%inclusion1 decks6 decks
16%synergy
Estrid's Invocation
17%inclusion1 decks6 decks
12%synergy
Timely Ward
17%inclusion1 decks6 decks
12%synergy
Exquisite Blood
17%inclusion1 decks6 decks
10%synergy
Starfield of Nyx
17%inclusion1 decks6 decks
13%synergy
Necrodominance
17%inclusion1 decks6 decks
16%synergy
Curator's Ward
17%inclusion1 decks6 decks
14%synergy
Stasis
17%inclusion1 decks6 decks
16%synergy
Static Prison
17%inclusion1 decks6 decks
16%synergy
Jace's Erasure
17%inclusion1 decks6 decks
16%synergy
Enchanted Evening
17%inclusion1 decks6 decks
15%synergy
Black Market Connections
17%inclusion1 decks6 decks
1%synergy
Nowhere to Run
17%inclusion1 decks6 decks
15%synergy
Aura of Silence
17%inclusion1 decks6 decks
14%synergy
Ghostly Prison
17%inclusion1 decks6 decks
-7%synergy
Propaganda
17%inclusion1 decks6 decks
-13%synergy
Arcane Laboratory
17%inclusion1 decks6 decks
16%synergy
Bitterblossom
17%inclusion1 decks6 decks
12%synergy
Standstill
17%inclusion1 decks6 decks
16%synergy
Planeswalkers
Teferi, Time Raveler
17%inclusion1 decks6 decks
8%synergy
Utility Lands
Ancient Tomb
50%inclusion3 decks6 decks
38%synergy
Hall of Heliod's Generosity
50%inclusion3 decks6 decks
37%synergy
Bojuka Bog
33%inclusion2 decks6 decks
7%synergy
Urza's Saga
33%inclusion2 decks6 decks
22%synergy
Emergence Zone
33%inclusion2 decks6 decks
31%synergy
Takenuma, Abandoned Mire
33%inclusion2 decks6 decks
27%synergy
Urborg, Tomb of Yawgmoth
33%inclusion2 decks6 decks
20%synergy
Otawara, Soaring City
33%inclusion2 decks6 decks
14%synergy
Shizo, Death's Storehouse
17%inclusion1 decks6 decks
14%synergy
Wasteland
17%inclusion1 decks6 decks
16%synergy
Minamo, School at Water's Edge
17%inclusion1 decks6 decks
13%synergy
Serra's Sanctum
17%inclusion1 decks6 decks
15%synergy
Halimar Depths
17%inclusion1 decks6 decks
12%synergy
Eiganjo, Seat of the Empire
17%inclusion1 decks6 decks
12%synergy
Eiganjo Castle
17%inclusion1 decks6 decks
14%synergy
Cephalid Coliseum
17%inclusion1 decks6 decks
13%synergy
Mana Artifacts
Arcane Signet
100%inclusion6 decks6 decks
12%synergy
Sol Ring
100%inclusion6 decks6 decks
10%synergy
Talisman of Progress
67%inclusion4 decks6 decks
22%synergy
Talisman of Dominance
67%inclusion4 decks6 decks
16%synergy
Talisman of Hierarchy
67%inclusion4 decks6 decks
21%synergy
Lotus Petal
50%inclusion3 decks6 decks
40%synergy
Mana Vault
50%inclusion3 decks6 decks
42%synergy
Fellwar Stone
33%inclusion2 decks6 decks
0%synergy
Mind Stone
33%inclusion2 decks6 decks
22%synergy
Commander's Sphere
17%inclusion1 decks6 decks
-0%synergy
Mox Amber
17%inclusion1 decks6 decks
10%synergy
Mox Opal
17%inclusion1 decks6 decks
9%synergy
Orzhov Signet
17%inclusion1 decks6 decks
-14%synergy
Azorius Signet
17%inclusion1 decks6 decks
-12%synergy
Lands
Swamp
100%inclusion6 decks6 decks
8%synergy
Island
100%inclusion6 decks6 decks
7%synergy
Plains
100%inclusion6 decks6 decks
8%synergy
Godless Shrine
83%inclusion5 decks6 decks
31%synergy
Marsh Flats
83%inclusion5 decks6 decks
47%synergy
Polluted Delta
83%inclusion5 decks6 decks
45%synergy
Hallowed Fountain
83%inclusion5 decks6 decks
32%synergy
Flooded Strand
83%inclusion5 decks6 decks
45%synergy
Watery Grave
83%inclusion5 decks6 decks
32%synergy
Command Tower
67%inclusion4 decks6 decks
-26%synergy
Caves of Koilos
67%inclusion4 decks6 decks
31%synergy
Sea of Clouds
67%inclusion4 decks6 decks
32%synergy
Morphic Pool
67%inclusion4 decks6 decks
33%synergy
Vault of Champions
67%inclusion4 decks6 decks
35%synergy
Floodfarm Verge
67%inclusion4 decks6 decks
56%synergy
Raffine's Tower
50%inclusion3 decks6 decks
9%synergy
Mana Confluence
50%inclusion3 decks6 decks
36%synergy
Adarkar Wastes
50%inclusion3 decks6 decks
17%synergy
Gloomlake Verge
50%inclusion3 decks6 decks
39%synergy
Undercity Sewers
33%inclusion2 decks6 decks
18%synergy
Shadowy Backstreet
33%inclusion2 decks6 decks
21%synergy
Exotic Orchard
33%inclusion2 decks6 decks
-26%synergy
Bleachbone Verge
33%inclusion2 decks6 decks
25%synergy
Valgavoth's Lair
33%inclusion2 decks6 decks
31%synergy
Verdant Catacombs
33%inclusion2 decks6 decks
24%synergy
Reflecting Pool
33%inclusion2 decks6 decks
25%synergy
Underground River
33%inclusion2 decks6 decks
-2%synergy
Gemstone Caverns
33%inclusion2 decks6 decks
26%synergy
Deserted Beach
33%inclusion2 decks6 decks
12%synergy
City of Brass
33%inclusion2 decks6 decks
18%synergy
Starting Town
20%inclusion1 decks5 decks
16%synergy
Tainted Isle
17%inclusion1 decks6 decks
10%synergy
Tundra
17%inclusion1 decks6 decks
1%synergy
Prismatic Vista
17%inclusion1 decks6 decks
13%synergy
Witch Enchanter
17%inclusion1 decks6 decks
9%synergy
Fell the Profane
17%inclusion1 decks6 decks
7%synergy
Misty Rainforest
17%inclusion1 decks6 decks
6%synergy
Fabled Passage
17%inclusion1 decks6 decks
9%synergy
Azorius Chancery
17%inclusion1 decks6 decks
4%synergy
Terramorphic Expanse
17%inclusion1 decks6 decks
1%synergy
Temple of Deceit
17%inclusion1 decks6 decks
0%synergy
Dimir Aqueduct
17%inclusion1 decks6 decks
4%synergy
Tainted Field
17%inclusion1 decks6 decks
10%synergy
Underground Sea
17%inclusion1 decks6 decks
1%synergy
Ash Barrens
17%inclusion1 decks6 decks
6%synergy
Snow-Covered Island
17%inclusion1 decks6 decks
14%synergy
Shipwreck Marsh
17%inclusion1 decks6 decks
-4%synergy
Boggart Trawler
17%inclusion1 decks6 decks
13%synergy
Arcane Sanctum
17%inclusion1 decks6 decks
-37%synergy
Cavern of Souls
17%inclusion1 decks6 decks
10%synergy
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