The Master of Keys (Commander) - Budget Midrange

The Master of Keys
Rank #304
10decks
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Budget
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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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Super Intelligence
100%inclusion1 decks1 decks
100%synergy
High Synergy Cards
Inquisitive Glimmer
90%inclusion9 decks10 decks
83%synergy
Scrabbling Skullcrab
70%inclusion7 decks10 decks
69%synergy
Doomwake Giant
70%inclusion7 decks10 decks
64%synergy
Entity Tracker
70%inclusion7 decks10 decks
64%synergy
Gravebreaker Lamia
60%inclusion6 decks10 decks
59%synergy
Victor, Valgavoth's Seneschal
60%inclusion6 decks10 decks
58%synergy
Grasp of Fate
60%inclusion6 decks10 decks
54%synergy
Mesa Enchantress
60%inclusion6 decks10 decks
51%synergy
Fear of Impostors
50%inclusion5 decks10 decks
49%synergy
Restricted Office // Lecture Hall
50%inclusion5 decks10 decks
48%synergy
Top Cards
Starfield Mystic
50%inclusion5 decks10 decks
44%synergy
Negate
50%inclusion5 decks10 decks
34%synergy
Mirrormade
50%inclusion5 decks10 decks
40%synergy
Amphibian Downpour
50%inclusion5 decks10 decks
45%synergy
Swords to Plowshares
50%inclusion5 decks10 decks
-18%synergy
Ghostly Dancers
50%inclusion5 decks10 decks
48%synergy
Underwater Tunnel // Slimy Aquarium
40%inclusion4 decks10 decks
40%synergy
Sigil of the Empty Throne
40%inclusion4 decks10 decks
34%synergy
Archon of Sun's Grace
40%inclusion4 decks10 decks
36%synergy
Touch the Spirit Realm
40%inclusion4 decks10 decks
38%synergy
Game Changers
Gifts Ungiven
10%inclusion1 decks10 decks
7%synergy
Creatures
Twilight Diviner
50%inclusion2 decks4 decks
49%synergy
Demon of Fate's Design
40%inclusion4 decks10 decks
35%synergy
Creeping Peeper
40%inclusion4 decks10 decks
40%synergy
Aminatou, Veil Piercer
40%inclusion4 decks10 decks
39%synergy
Grim Guardian
40%inclusion4 decks10 decks
38%synergy
Killian, Decisive Mentor
33%inclusion1 decks3 decks
33%synergy
Starnheim Courser
30%inclusion3 decks10 decks
26%synergy
Soaring Lightbringer
30%inclusion3 decks10 decks
26%synergy
Skullsnap Nuisance
30%inclusion3 decks10 decks
30%synergy
Enduring Curiosity
30%inclusion3 decks10 decks
22%synergy
Fear of Sleep Paralysis
30%inclusion3 decks10 decks
25%synergy
Balemurk Leech
30%inclusion3 decks10 decks
29%synergy
Emet-Selch of the Third Seat
25%inclusion2 decks8 decks
16%synergy
Summon: Yojimbo
25%inclusion2 decks8 decks
24%synergy
Fear of Infinity
20%inclusion2 decks10 decks
19%synergy
Fear of Surveillance
20%inclusion2 decks10 decks
20%synergy
Horrid Shadowspinner
20%inclusion2 decks10 decks
20%synergy
Silent Hallcreeper
20%inclusion2 decks10 decks
15%synergy
Ashiok's Reaper
20%inclusion2 decks10 decks
20%synergy
Moon-Blessed Cleric
20%inclusion2 decks10 decks
15%synergy
Spirited Companion
20%inclusion2 decks10 decks
18%synergy
Appendage Amalgam
20%inclusion2 decks10 decks
20%synergy
Gremlin Tamer
20%inclusion2 decks10 decks
19%synergy
Archetype of Imagination
20%inclusion2 decks10 decks
15%synergy
Auramancer
20%inclusion2 decks10 decks
17%synergy
Heliod, the Radiant Dawn
20%inclusion2 decks10 decks
17%synergy
Abdel Adrian, Gorion's Ward
20%inclusion2 decks10 decks
18%synergy
Zur, Eternal Schemer
20%inclusion2 decks10 decks
17%synergy
Mindwrack Harpy
20%inclusion2 decks10 decks
20%synergy
Millikin
20%inclusion2 decks10 decks
19%synergy
Jill, Shiva's Dominant
13%inclusion1 decks8 decks
12%synergy
Siegfried, Famed Swordsman
13%inclusion1 decks8 decks
12%synergy
Summon: Anima
13%inclusion1 decks8 decks
12%synergy
Fear of Falling
10%inclusion1 decks10 decks
10%synergy
Optimistic Scavenger
10%inclusion1 decks10 decks
10%synergy
Stenn, Paranoid Partisan
10%inclusion1 decks10 decks
9%synergy
Darkstar Augur
10%inclusion1 decks10 decks
10%synergy
Fear of Isolation
10%inclusion1 decks10 decks
10%synergy
Syr Konrad, the Grim
10%inclusion1 decks10 decks
5%synergy
Hoarding Broodlord
10%inclusion1 decks10 decks
8%synergy
Scholar of the Ages
10%inclusion1 decks10 decks
10%synergy
Keeper of Keys
10%inclusion1 decks10 decks
10%synergy
Dashing Bloodsucker
10%inclusion1 decks10 decks
10%synergy
Erratic Apparition
10%inclusion1 decks10 decks
10%synergy
High Fae Trickster
10%inclusion1 decks10 decks
6%synergy
Overlord of the Floodpits
10%inclusion1 decks10 decks
7%synergy
Fear of Lost Teeth
10%inclusion1 decks10 decks
10%synergy
Malcolm, Alluring Scoundrel
10%inclusion1 decks10 decks
5%synergy
Agent of Erebos
10%inclusion1 decks10 decks
10%synergy
Vohar, Vodalian Desecrator
10%inclusion1 decks10 decks
6%synergy
Instants
Faithful Mending
40%inclusion4 decks10 decks
36%synergy
Otherworldly Gaze
40%inclusion4 decks10 decks
38%synergy
Counterspell
40%inclusion4 decks10 decks
-2%synergy
Dreams of Laguna
38%inclusion3 decks8 decks
37%synergy
Swallowed by Leviathan
38%inclusion3 decks8 decks
37%synergy
Frantic Search
30%inclusion3 decks10 decks
11%synergy
Dovin's Veto
30%inclusion3 decks10 decks
4%synergy
Thirst for Meaning
30%inclusion3 decks10 decks
29%synergy
Path to Exile
30%inclusion3 decks10 decks
-12%synergy
Drown in the Loch
20%inclusion2 decks10 decks
18%synergy
An Offer You Can't Refuse
20%inclusion2 decks10 decks
-8%synergy
Refute
20%inclusion2 decks10 decks
17%synergy
Fact or Fiction
20%inclusion2 decks10 decks
16%synergy
Unwanted Remake
20%inclusion2 decks10 decks
20%synergy
Amazing Acrobatics
14%inclusion1 decks7 decks
13%synergy
Hero's Downfall
10%inclusion1 decks10 decks
9%synergy
Sacrifice
10%inclusion1 decks10 decks
9%synergy
Muddle the Mixture
10%inclusion1 decks10 decks
6%synergy
Shred Memory
10%inclusion1 decks10 decks
10%synergy
Condemn
10%inclusion1 decks10 decks
10%synergy
Not Dead After All
10%inclusion1 decks10 decks
9%synergy
Confounding Riddle
10%inclusion1 decks10 decks
10%synergy
Lim-Dûl's Vault
10%inclusion1 decks10 decks
7%synergy
Price of Fame
10%inclusion1 decks10 decks
10%synergy
Essence Scatter
10%inclusion1 decks10 decks
9%synergy
Dark Ritual
10%inclusion1 decks10 decks
-10%synergy
Forbidden Alchemy
10%inclusion1 decks10 decks
9%synergy
Dispel
10%inclusion1 decks10 decks
7%synergy
Void Rend
10%inclusion1 decks10 decks
-25%synergy
Pulse of the Grid
10%inclusion1 decks10 decks
10%synergy
Seized from Slumber
10%inclusion1 decks10 decks
10%synergy
Aetherize
10%inclusion1 decks10 decks
6%synergy
Strix Serenade
10%inclusion1 decks10 decks
7%synergy
Spellgyre
10%inclusion1 decks10 decks
10%synergy
Resculpt
10%inclusion1 decks10 decks
9%synergy
Alchemist's Retrieval
10%inclusion1 decks10 decks
10%synergy
Murder
10%inclusion1 decks10 decks
8%synergy
Infernal Grasp
10%inclusion1 decks10 decks
9%synergy
Disenchant
10%inclusion1 decks10 decks
8%synergy
Arcane Denial
10%inclusion1 decks10 decks
-10%synergy
Beyeen Veil
10%inclusion1 decks10 decks
10%synergy
Mandate of Peace
10%inclusion1 decks10 decks
10%synergy
Hostile Negotiations
10%inclusion1 decks10 decks
9%synergy
Flicker of Fate
10%inclusion1 decks10 decks
10%synergy
Waterlogged Teachings
10%inclusion1 decks10 decks
5%synergy
Saw in Half
10%inclusion1 decks10 decks
8%synergy
Rowan's Grim Search
10%inclusion1 decks10 decks
10%synergy
Mortify
10%inclusion1 decks10 decks
1%synergy
Withering Torment
10%inclusion1 decks10 decks
8%synergy
Sorceries
Dance of the Manse
40%inclusion4 decks10 decks
37%synergy
Sevinne's Reclamation
30%inclusion3 decks10 decks
21%synergy
Buried Alive
30%inclusion3 decks10 decks
26%synergy
Redress Fate
30%inclusion3 decks10 decks
25%synergy
Singularity Rupture
29%inclusion2 decks7 decks
26%synergy
Glimpse the Unthinkable
20%inclusion2 decks10 decks
20%synergy
Brilliant Restoration
20%inclusion2 decks10 decks
18%synergy
Diresight
20%inclusion2 decks10 decks
19%synergy
Extinguish All Hope
20%inclusion2 decks10 decks
18%synergy
Space-Time Anomaly
14%inclusion1 decks7 decks
13%synergy
Supreme Verdict
10%inclusion1 decks10 decks
-5%synergy
Lively Dirge
10%inclusion1 decks10 decks
9%synergy
Triumphant Reckoning
10%inclusion1 decks10 decks
10%synergy
Unmarked Grave
10%inclusion1 decks10 decks
9%synergy
Open the Vaults
10%inclusion1 decks10 decks
9%synergy
Fascination
10%inclusion1 decks10 decks
10%synergy
Split Up
10%inclusion1 decks10 decks
9%synergy
Careful Study
10%inclusion1 decks10 decks
8%synergy
Wrath of God
10%inclusion1 decks10 decks
6%synergy
Persist
10%inclusion1 decks10 decks
8%synergy
Cut Your Losses
10%inclusion1 decks10 decks
10%synergy
Deep Analysis
10%inclusion1 decks10 decks
9%synergy
Feed the Swarm
10%inclusion1 decks10 decks
7%synergy
Contingency Plan
10%inclusion1 decks10 decks
10%synergy
Yahenni's Expertise
10%inclusion1 decks10 decks
9%synergy
Demonic Counsel
10%inclusion1 decks10 decks
9%synergy
Night's Whisper
10%inclusion1 decks10 decks
7%synergy
Living Death
10%inclusion1 decks10 decks
5%synergy
Final Parting
10%inclusion1 decks10 decks
9%synergy
Twilight's Call
10%inclusion1 decks10 decks
10%synergy
Inspiration from Beyond
10%inclusion1 decks10 decks
10%synergy
Unending Whisper
10%inclusion1 decks10 decks
10%synergy
Final Vengeance
10%inclusion1 decks10 decks
10%synergy
Day of Judgment
10%inclusion1 decks10 decks
9%synergy
Winternight Stories
10%inclusion1 decks10 decks
9%synergy
Mystic Meditation
10%inclusion1 decks10 decks
10%synergy
Promise of Loyalty
10%inclusion1 decks10 decks
6%synergy
Traumatize
10%inclusion1 decks10 decks
10%synergy
Utility Artifacts
Keys to the House
20%inclusion2 decks10 decks
20%synergy
Matzalantli, the Great Door
10%inclusion1 decks10 decks
8%synergy
Cloud Key
10%inclusion1 decks10 decks
7%synergy
Wayfarer's Bauble
10%inclusion1 decks10 decks
3%synergy
Skeleton Key
10%inclusion1 decks10 decks
10%synergy
Manifold Key
10%inclusion1 decks10 decks
9%synergy
Moonsilver Key
10%inclusion1 decks10 decks
9%synergy
Mystery Key
10%inclusion1 decks10 decks
10%synergy
The Key to the Vault
10%inclusion1 decks10 decks
7%synergy
Wishclaw Talisman
10%inclusion1 decks10 decks
2%synergy
Key to the City
10%inclusion1 decks10 decks
9%synergy
Swiftfoot Boots
10%inclusion1 decks10 decks
-14%synergy
Bident of Thassa
10%inclusion1 decks10 decks
1%synergy
Shorikai, Genesis Engine
10%inclusion1 decks10 decks
6%synergy
Collector's Vault
10%inclusion1 decks10 decks
8%synergy
Enchantments
Sphere of Safety
40%inclusion4 decks10 decks
31%synergy
All That Glitters
40%inclusion4 decks10 decks
32%synergy
Seal of Cleansing
40%inclusion4 decks10 decks
39%synergy
Monologue Tax
40%inclusion4 decks10 decks
33%synergy
Dress Down
40%inclusion4 decks10 decks
38%synergy
Secret Arcade // Dusty Parlor
40%inclusion4 decks10 decks
36%synergy
Sheltered by Ghosts
40%inclusion4 decks10 decks
37%synergy
Ethereal Armor
40%inclusion4 decks10 decks
35%synergy
Defiled Crypt // Cadaver Lab
40%inclusion4 decks10 decks
39%synergy
Dimensional Exile
33%inclusion1 decks3 decks
33%synergy
Retro-Mutation
33%inclusion1 decks3 decks
33%synergy
Darksteel Mutation
30%inclusion3 decks10 decks
24%synergy
Ripples of Undeath
30%inclusion3 decks10 decks
27%synergy
Imprisoned in the Moon
30%inclusion3 decks10 decks
23%synergy
Unable to Scream
30%inclusion3 decks10 decks
29%synergy
Necromancy
30%inclusion3 decks10 decks
26%synergy
Meat Locker // Drowned Diner
30%inclusion3 decks10 decks
30%synergy
Shark Typhoon
30%inclusion3 decks10 decks
24%synergy
Central Elevator // Promising Stairs
30%inclusion3 decks10 decks
29%synergy
The Tale of Tamiyo
30%inclusion3 decks10 decks
30%synergy
Cemetery Tampering
30%inclusion3 decks10 decks
29%synergy
Bottomless Pool // Locker Room
30%inclusion3 decks10 decks
28%synergy
Animate Dead
30%inclusion3 decks10 decks
20%synergy
Nowhere to Run
30%inclusion3 decks10 decks
29%synergy
Mirror Room // Fractured Realm
30%inclusion3 decks10 decks
28%synergy
Propaganda
30%inclusion3 decks10 decks
1%synergy
Seal of Removal
30%inclusion3 decks10 decks
29%synergy
Mornsong Aria
25%inclusion1 decks4 decks
24%synergy
Cramped Vents // Access Maze
20%inclusion2 decks10 decks
18%synergy
Cacophony Unleashed
20%inclusion2 decks10 decks
18%synergy
Court of Cunning
20%inclusion2 decks10 decks
19%synergy
Extravagant Replication
20%inclusion2 decks10 decks
15%synergy
Surgical Suite // Hospital Room
20%inclusion2 decks10 decks
20%synergy
Estrid's Invocation
20%inclusion2 decks10 decks
15%synergy
Mystic Remora
20%inclusion2 decks10 decks
-0%synergy
Derelict Attic // Widow's Walk
20%inclusion2 decks10 decks
20%synergy
Secrets of the Dead
20%inclusion2 decks10 decks
20%synergy
Unholy Annex // Ritual Chamber
20%inclusion2 decks10 decks
19%synergy
Eaten by Piranhas
20%inclusion2 decks10 decks
19%synergy
Dazzling Theater // Prop Room
20%inclusion2 decks10 decks
19%synergy
Solitary Confinement
20%inclusion2 decks10 decks
18%synergy
Stillness in Motion
20%inclusion2 decks10 decks
20%synergy
Ballad of the Black Flag
20%inclusion2 decks10 decks
20%synergy
Aang's Iceberg
14%inclusion1 decks7 decks
14%synergy
Champions from Beyond
13%inclusion1 decks8 decks
9%synergy
Stuck in Summoner's Sanctum
13%inclusion1 decks8 decks
12%synergy
Minimus Containment
10%inclusion1 decks10 decks
10%synergy
Founding the Third Path
10%inclusion1 decks10 decks
10%synergy
Fortune Teller's Talent
10%inclusion1 decks10 decks
10%synergy
Verity Circle
10%inclusion1 decks10 decks
10%synergy
Battles
Invasion of Theros
10%inclusion1 decks10 decks
8%synergy
Utility Lands
Bojuka Bog
40%inclusion4 decks10 decks
13%synergy
Hall of Heliod's Generosity
40%inclusion4 decks10 decks
27%synergy
Ishgard, the Holy See
25%inclusion2 decks8 decks
22%synergy
Eden, Seat of the Sanctum
13%inclusion1 decks8 decks
12%synergy
Mystic Sanctuary
10%inclusion1 decks10 decks
6%synergy
Dalkovan Encampment
10%inclusion1 decks10 decks
10%synergy
Windbrisk Heights
10%inclusion1 decks10 decks
9%synergy
Halimar Depths
10%inclusion1 decks10 decks
5%synergy
Restless Anchorage
10%inclusion1 decks10 decks
9%synergy
Drownyard Temple
10%inclusion1 decks10 decks
10%synergy
Cephalid Coliseum
10%inclusion1 decks10 decks
6%synergy
Dakmor Salvage
10%inclusion1 decks10 decks
10%synergy
Restless Reef
10%inclusion1 decks10 decks
9%synergy
Vault of the Archangel
10%inclusion1 decks10 decks
4%synergy
Mana Artifacts
Arcane Signet
80%inclusion8 decks10 decks
-8%synergy
Sol Ring
70%inclusion7 decks10 decks
-20%synergy
Orzhov Signet
60%inclusion6 decks10 decks
29%synergy
Azorius Signet
60%inclusion6 decks10 decks
30%synergy
Talisman of Progress
50%inclusion5 decks10 decks
6%synergy
Fellwar Stone
50%inclusion5 decks10 decks
17%synergy
Talisman of Dominance
40%inclusion4 decks10 decks
-10%synergy
Dimir Signet
40%inclusion4 decks10 decks
10%synergy
Talisman of Hierarchy
40%inclusion4 decks10 decks
-5%synergy
Mind Stone
20%inclusion2 decks10 decks
8%synergy
Unstable Obelisk
10%inclusion1 decks10 decks
10%synergy
Commander's Sphere
10%inclusion1 decks10 decks
-7%synergy
Silumgar Monument
10%inclusion1 decks10 decks
10%synergy
Spectral Searchlight
10%inclusion1 decks10 decks
10%synergy
Orzhov Keyrune
10%inclusion1 decks10 decks
10%synergy
Obelisk of Esper
10%inclusion1 decks10 decks
9%synergy
Star Compass
10%inclusion1 decks10 decks
10%synergy
Manalith
10%inclusion1 decks10 decks
10%synergy
Lands
Swamp
100%inclusion10 decks10 decks
8%synergy
Island
100%inclusion10 decks10 decks
7%synergy
Plains
100%inclusion10 decks10 decks
8%synergy
Command Tower
90%inclusion9 decks10 decks
-3%synergy
Arcane Sanctum
90%inclusion9 decks10 decks
36%synergy
Exotic Orchard
70%inclusion7 decks10 decks
11%synergy
Glacial Fortress
60%inclusion6 decks10 decks
17%synergy
Prairie Stream
60%inclusion6 decks10 decks
19%synergy
Evolving Wilds
60%inclusion6 decks10 decks
36%synergy
Sunken Hollow
60%inclusion6 decks10 decks
20%synergy
Contaminated Landscape
50%inclusion5 decks10 decks
36%synergy
Valgavoth's Lair
50%inclusion5 decks10 decks
47%synergy
Isolated Chapel
50%inclusion5 decks10 decks
8%synergy
Caves of Koilos
40%inclusion4 decks10 decks
4%synergy
Adarkar Wastes
40%inclusion4 decks10 decks
7%synergy
Tainted Isle
30%inclusion3 decks10 decks
24%synergy
Terramorphic Expanse
30%inclusion3 decks10 decks
14%synergy
Temple of Deceit
30%inclusion3 decks10 decks
13%synergy
Fetid Heath
30%inclusion3 decks10 decks
16%synergy
Tainted Field
30%inclusion3 decks10 decks
23%synergy
Darkwater Catacombs
30%inclusion3 decks10 decks
15%synergy
Ash Barrens
30%inclusion3 decks10 decks
19%synergy
Drowned Catacomb
30%inclusion3 decks10 decks
-8%synergy
Underground River
30%inclusion3 decks10 decks
-5%synergy
Temple of Enlightenment
30%inclusion3 decks10 decks
15%synergy
Temple of Silence
30%inclusion3 decks10 decks
12%synergy
Dimir Aqueduct
20%inclusion2 decks10 decks
7%synergy
Irrigated Farmland
20%inclusion2 decks10 decks
13%synergy
Port Town
20%inclusion2 decks10 decks
3%synergy
Skycloud Expanse
20%inclusion2 decks10 decks
5%synergy
Path of Ancestry
20%inclusion2 decks10 decks
-8%synergy
Command Bridge
14%inclusion1 decks7 decks
14%synergy
Vibrant Cityscape
14%inclusion1 decks7 decks
13%synergy
Idyllic Beachfront
10%inclusion1 decks10 decks
6%synergy
Fabled Passage
10%inclusion1 decks10 decks
2%synergy
Azorius Chancery
10%inclusion1 decks10 decks
-3%synergy
Waterfront District
10%inclusion1 decks10 decks
9%synergy
Grand Coliseum
10%inclusion1 decks10 decks
10%synergy
Myriad Landscape
10%inclusion1 decks10 decks
3%synergy
Silverquill Campus
10%inclusion1 decks10 decks
10%synergy
Conduit Pylons
10%inclusion1 decks10 decks
10%synergy
Hidden Grotto
10%inclusion1 decks10 decks
10%synergy
Desolate Mire
10%inclusion1 decks10 decks
3%synergy
Skybridge Towers
10%inclusion1 decks10 decks
9%synergy
Spire of Industry
10%inclusion1 decks10 decks
2%synergy
Hydroelectric Specimen
10%inclusion1 decks10 decks
7%synergy
Tranquil Cove
10%inclusion1 decks10 decks
4%synergy
Boggart Trawler
10%inclusion1 decks10 decks
7%synergy
Study
10%inclusion1 decks10 decks
10%synergy
River of Tears
10%inclusion1 decks10 decks
8%synergy
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