The Master of Keys (Commander) - Budget Midrange

The Master of Keys
Rank #309
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Background image for What if Thassa's Oracle Were Banned?
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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Doomwake Giant
78%inclusion7 decks9 decks
72%synergy
Inquisitive Glimmer
78%inclusion7 decks9 decks
70%synergy
Scrabbling Skullcrab
67%inclusion6 decks9 decks
66%synergy
Gravebreaker Lamia
56%inclusion5 decks9 decks
55%synergy
Fear of Impostors
56%inclusion5 decks9 decks
54%synergy
Victor, Valgavoth's Seneschal
56%inclusion5 decks9 decks
53%synergy
Ghostly Dancers
56%inclusion5 decks9 decks
53%synergy
Soaring Lightbringer
56%inclusion5 decks9 decks
51%synergy
Secret Arcade // Dusty Parlor
56%inclusion5 decks9 decks
50%synergy
Demon of Fate's Design
56%inclusion5 decks9 decks
50%synergy
Top Cards
Sigil of the Empty Throne
56%inclusion5 decks9 decks
50%synergy
Mirrormade
56%inclusion5 decks9 decks
46%synergy
Mesa Enchantress
56%inclusion5 decks9 decks
46%synergy
Swords to Plowshares
56%inclusion5 decks9 decks
-13%synergy
Entity Tracker
56%inclusion5 decks9 decks
49%synergy
Grasp of Fate
44%inclusion4 decks9 decks
38%synergy
Starfield Mystic
44%inclusion4 decks9 decks
38%synergy
Sphere of Safety
44%inclusion4 decks9 decks
35%synergy
Fear of Sleep Paralysis
44%inclusion4 decks9 decks
39%synergy
Amphibian Downpour
44%inclusion4 decks9 decks
40%synergy
Game Changers
Gifts Ungiven
11%inclusion1 decks9 decks
9%synergy
Creatures
Aminatou, Veil Piercer
44%inclusion4 decks9 decks
43%synergy
Archon of Sun's Grace
33%inclusion3 decks9 decks
29%synergy
Moon-Blessed Cleric
33%inclusion3 decks9 decks
29%synergy
Enduring Curiosity
33%inclusion3 decks9 decks
26%synergy
Archetype of Imagination
33%inclusion3 decks9 decks
29%synergy
Creeping Peeper
33%inclusion3 decks9 decks
33%synergy
Heliod, the Radiant Dawn
33%inclusion3 decks9 decks
30%synergy
Fear of Infinity
22%inclusion2 decks9 decks
22%synergy
Agent of Erebos
22%inclusion2 decks9 decks
22%synergy
Silent Hallcreeper
22%inclusion2 decks9 decks
18%synergy
Ashiok's Reaper
22%inclusion2 decks9 decks
22%synergy
Skullsnap Nuisance
22%inclusion2 decks9 decks
22%synergy
Spirited Companion
22%inclusion2 decks9 decks
20%synergy
Gremlin Tamer
22%inclusion2 decks9 decks
21%synergy
Balemurk Leech
22%inclusion2 decks9 decks
22%synergy
Auramancer
22%inclusion2 decks9 decks
19%synergy
Grim Guardian
22%inclusion2 decks9 decks
20%synergy
Abdel Adrian, Gorion's Ward
22%inclusion2 decks9 decks
20%synergy
Emet-Selch of the Third Seat
14%inclusion1 decks7 decks
5%synergy
Ultimecia, Time Sorceress
14%inclusion1 decks7 decks
14%synergy
Jill, Shiva's Dominant
14%inclusion1 decks7 decks
14%synergy
Siegfried, Famed Swordsman
14%inclusion1 decks7 decks
14%synergy
Summon: Yojimbo
14%inclusion1 decks7 decks
13%synergy
Summon: Anima
14%inclusion1 decks7 decks
14%synergy
Fear of Falling
11%inclusion1 decks9 decks
11%synergy
Solemn Simulacrum
11%inclusion1 decks9 decks
-4%synergy
Starnheim Courser
11%inclusion1 decks9 decks
7%synergy
Metamorphosis Fanatic
11%inclusion1 decks9 decks
6%synergy
Optimistic Scavenger
11%inclusion1 decks9 decks
11%synergy
Darkstar Augur
11%inclusion1 decks9 decks
11%synergy
Fear of Isolation
11%inclusion1 decks9 decks
11%synergy
Syr Konrad, the Grim
11%inclusion1 decks9 decks
5%synergy
Hoarding Broodlord
11%inclusion1 decks9 decks
9%synergy
Scholar of the Ages
11%inclusion1 decks9 decks
11%synergy
Keeper of Keys
11%inclusion1 decks9 decks
11%synergy
Dashing Bloodsucker
11%inclusion1 decks9 decks
11%synergy
Erratic Apparition
11%inclusion1 decks9 decks
11%synergy
High Fae Trickster
11%inclusion1 decks9 decks
6%synergy
The Mindskinner
11%inclusion1 decks9 decks
10%synergy
Overlord of the Floodpits
11%inclusion1 decks9 decks
7%synergy
Fear of Lost Teeth
11%inclusion1 decks9 decks
11%synergy
Emet-Selch, Unsundered
11%inclusion1 decks9 decks
10%synergy
Malcolm, Alluring Scoundrel
11%inclusion1 decks9 decks
6%synergy
Vohar, Vodalian Desecrator
11%inclusion1 decks9 decks
7%synergy
Floodpits Drowner
11%inclusion1 decks9 decks
11%synergy
Eidolon of Astral Winds
11%inclusion1 decks9 decks
11%synergy
Fear of Surveillance
11%inclusion1 decks9 decks
11%synergy
Vile Entomber
11%inclusion1 decks9 decks
10%synergy
Hydroelectric Specimen
11%inclusion1 decks9 decks
8%synergy
Summon: Shiva
11%inclusion1 decks9 decks
11%synergy
Instants
Negate
33%inclusion3 decks9 decks
17%synergy
Fact or Fiction
33%inclusion3 decks9 decks
29%synergy
Faithful Mending
33%inclusion3 decks9 decks
29%synergy
Otherworldly Gaze
33%inclusion3 decks9 decks
31%synergy
Counterspell
33%inclusion3 decks9 decks
-8%synergy
Dreams of Laguna
29%inclusion2 decks7 decks
28%synergy
Frantic Search
22%inclusion2 decks9 decks
5%synergy
Dovin's Veto
22%inclusion2 decks9 decks
-3%synergy
An Offer You Can't Refuse
22%inclusion2 decks9 decks
-4%synergy
Thirst for Meaning
22%inclusion2 decks9 decks
21%synergy
Unwanted Remake
22%inclusion2 decks9 decks
22%synergy
Arcane Denial
22%inclusion2 decks9 decks
2%synergy
Path to Exile
22%inclusion2 decks9 decks
-20%synergy
Swallowed by Leviathan
14%inclusion1 decks7 decks
14%synergy
Hero's Downfall
11%inclusion1 decks9 decks
10%synergy
Sacrifice
11%inclusion1 decks9 decks
10%synergy
Muddle the Mixture
11%inclusion1 decks9 decks
7%synergy
Drown in the Loch
11%inclusion1 decks9 decks
9%synergy
Shred Memory
11%inclusion1 decks9 decks
11%synergy
Refute
11%inclusion1 decks9 decks
8%synergy
Return to Dust
11%inclusion1 decks9 decks
7%synergy
Brainstorm
11%inclusion1 decks9 decks
-6%synergy
Not Dead After All
11%inclusion1 decks9 decks
11%synergy
Lim-Dûl's Vault
11%inclusion1 decks9 decks
8%synergy
Essence Scatter
11%inclusion1 decks9 decks
10%synergy
Consider
11%inclusion1 decks9 decks
9%synergy
Dark Ritual
11%inclusion1 decks9 decks
-8%synergy
Dispel
11%inclusion1 decks9 decks
7%synergy
Seized from Slumber
11%inclusion1 decks9 decks
11%synergy
Aetherize
11%inclusion1 decks9 decks
7%synergy
Strix Serenade
11%inclusion1 decks9 decks
7%synergy
Resculpt
11%inclusion1 decks9 decks
10%synergy
Alchemist's Retrieval
11%inclusion1 decks9 decks
11%synergy
Murder
11%inclusion1 decks9 decks
9%synergy
Disenchant
11%inclusion1 decks9 decks
9%synergy
Mandate of Peace
11%inclusion1 decks9 decks
11%synergy
Hostile Negotiations
11%inclusion1 decks9 decks
10%synergy
Utter End
11%inclusion1 decks9 decks
4%synergy
Flicker of Fate
11%inclusion1 decks9 decks
11%synergy
Inkshield
11%inclusion1 decks9 decks
2%synergy
Waterlogged Teachings
11%inclusion1 decks9 decks
7%synergy
Saw in Half
11%inclusion1 decks9 decks
9%synergy
Mortify
11%inclusion1 decks9 decks
2%synergy
Withering Torment
11%inclusion1 decks9 decks
9%synergy
Sorceries
Sevinne's Reclamation
33%inclusion3 decks9 decks
24%synergy
Redress Fate
33%inclusion3 decks9 decks
27%synergy
Dance of the Manse
33%inclusion3 decks9 decks
30%synergy
Singularity Rupture
33%inclusion2 decks6 decks
31%synergy
Glimpse the Unthinkable
22%inclusion2 decks9 decks
22%synergy
Buried Alive
22%inclusion2 decks9 decks
18%synergy
Brilliant Restoration
22%inclusion2 decks9 decks
20%synergy
Extinguish All Hope
22%inclusion2 decks9 decks
21%synergy
Space-Time Anomaly
17%inclusion1 decks6 decks
15%synergy
Ponder
11%inclusion1 decks9 decks
2%synergy
Supreme Verdict
11%inclusion1 decks9 decks
-4%synergy
Commune with Evil
11%inclusion1 decks9 decks
11%synergy
Lively Dirge
11%inclusion1 decks9 decks
10%synergy
Triumphant Reckoning
11%inclusion1 decks9 decks
11%synergy
Resurgent Belief
11%inclusion1 decks9 decks
9%synergy
Unmarked Grave
11%inclusion1 decks9 decks
10%synergy
Open the Vaults
11%inclusion1 decks9 decks
10%synergy
Fascination
11%inclusion1 decks9 decks
11%synergy
Split Up
11%inclusion1 decks9 decks
10%synergy
Start the TARDIS
11%inclusion1 decks9 decks
11%synergy
Careful Study
11%inclusion1 decks9 decks
9%synergy
Wrath of God
11%inclusion1 decks9 decks
7%synergy
Persist
11%inclusion1 decks9 decks
9%synergy
Time Wipe
11%inclusion1 decks9 decks
4%synergy
Terminus
11%inclusion1 decks9 decks
7%synergy
Cut Your Losses
11%inclusion1 decks9 decks
11%synergy
Deep Analysis
11%inclusion1 decks9 decks
10%synergy
Feed the Swarm
11%inclusion1 decks9 decks
8%synergy
Contingency Plan
11%inclusion1 decks9 decks
11%synergy
Yahenni's Expertise
11%inclusion1 decks9 decks
10%synergy
Demonic Counsel
11%inclusion1 decks9 decks
10%synergy
Night's Whisper
11%inclusion1 decks9 decks
9%synergy
Living Death
11%inclusion1 decks9 decks
7%synergy
Final Parting
11%inclusion1 decks9 decks
11%synergy
Diresight
11%inclusion1 decks9 decks
11%synergy
Twilight's Call
11%inclusion1 decks9 decks
11%synergy
Suppression Ray
11%inclusion1 decks9 decks
11%synergy
Inspiration from Beyond
11%inclusion1 decks9 decks
11%synergy
Unending Whisper
11%inclusion1 decks9 decks
11%synergy
Final Vengeance
11%inclusion1 decks9 decks
11%synergy
Day of Judgment
11%inclusion1 decks9 decks
10%synergy
Winternight Stories
11%inclusion1 decks9 decks
10%synergy
Mystic Meditation
11%inclusion1 decks9 decks
11%synergy
Promise of Loyalty
11%inclusion1 decks9 decks
7%synergy
Traumatize
11%inclusion1 decks9 decks
11%synergy
Utility Artifacts
Keys to the House
22%inclusion2 decks9 decks
22%synergy
Cloud Key
11%inclusion1 decks9 decks
8%synergy
Wayfarer's Bauble
11%inclusion1 decks9 decks
3%synergy
Skeleton Key
11%inclusion1 decks9 decks
11%synergy
Manifold Key
11%inclusion1 decks9 decks
10%synergy
Moonsilver Key
11%inclusion1 decks9 decks
10%synergy
Mystery Key
11%inclusion1 decks9 decks
11%synergy
The Key to the Vault
11%inclusion1 decks9 decks
9%synergy
Wishclaw Talisman
11%inclusion1 decks9 decks
3%synergy
Key to the City
11%inclusion1 decks9 decks
10%synergy
Swiftfoot Boots
11%inclusion1 decks9 decks
-13%synergy
Bident of Thassa
11%inclusion1 decks9 decks
2%synergy
Shorikai, Genesis Engine
11%inclusion1 decks9 decks
7%synergy
Collector's Vault
11%inclusion1 decks9 decks
9%synergy
Enchantments
Restricted Office // Lecture Hall
44%inclusion4 decks9 decks
42%synergy
Bottomless Pool // Locker Room
44%inclusion4 decks9 decks
42%synergy
Mirror Room // Fractured Realm
44%inclusion4 decks9 decks
42%synergy
Cramped Vents // Access Maze
33%inclusion3 decks9 decks
31%synergy
Ripples of Undeath
33%inclusion3 decks9 decks
31%synergy
Underwater Tunnel // Slimy Aquarium
33%inclusion3 decks9 decks
33%synergy
Touch the Spirit Realm
33%inclusion3 decks9 decks
31%synergy
Surgical Suite // Hospital Room
33%inclusion3 decks9 decks
33%synergy
Necromancy
33%inclusion3 decks9 decks
29%synergy
Meat Locker // Drowned Diner
33%inclusion3 decks9 decks
33%synergy
Shark Typhoon
33%inclusion3 decks9 decks
27%synergy
Derelict Attic // Widow's Walk
33%inclusion3 decks9 decks
33%synergy
Central Elevator // Promising Stairs
33%inclusion3 decks9 decks
33%synergy
Seal of Cleansing
33%inclusion3 decks9 decks
32%synergy
Monologue Tax
33%inclusion3 decks9 decks
27%synergy
Animate Dead
33%inclusion3 decks9 decks
24%synergy
Dress Down
33%inclusion3 decks9 decks
31%synergy
Stillness in Motion
33%inclusion3 decks9 decks
33%synergy
Nowhere to Run
33%inclusion3 decks9 decks
32%synergy
Seal of Removal
33%inclusion3 decks9 decks
33%synergy
Defiled Crypt // Cadaver Lab
33%inclusion3 decks9 decks
33%synergy
Imprisoned in the Moon
22%inclusion2 decks9 decks
16%synergy
Extravagant Replication
22%inclusion2 decks9 decks
17%synergy
Unable to Scream
22%inclusion2 decks9 decks
21%synergy
The Eldest Reborn
22%inclusion2 decks9 decks
20%synergy
Meathook Massacre II
22%inclusion2 decks9 decks
22%synergy
Mystic Remora
22%inclusion2 decks9 decks
1%synergy
Timely Ward
22%inclusion2 decks9 decks
17%synergy
The Tale of Tamiyo
22%inclusion2 decks9 decks
22%synergy
Cemetery Tampering
22%inclusion2 decks9 decks
21%synergy
Leyline of Anticipation
22%inclusion2 decks9 decks
18%synergy
All That Glitters
22%inclusion2 decks9 decks
13%synergy
Unholy Annex // Ritual Chamber
22%inclusion2 decks9 decks
21%synergy
Dazzling Theater // Prop Room
22%inclusion2 decks9 decks
21%synergy
Sheltered by Ghosts
22%inclusion2 decks9 decks
20%synergy
Ethereal Armor
22%inclusion2 decks9 decks
18%synergy
Propaganda
22%inclusion2 decks9 decks
-4%synergy
Stuck in Summoner's Sanctum
14%inclusion1 decks7 decks
14%synergy
Darksteel Mutation
11%inclusion1 decks9 decks
5%synergy
One with the Multiverse
11%inclusion1 decks9 decks
6%synergy
Minimus Containment
11%inclusion1 decks9 decks
11%synergy
Founding the Third Path
11%inclusion1 decks9 decks
11%synergy
Fortune Teller's Talent
11%inclusion1 decks9 decks
11%synergy
Verity Circle
11%inclusion1 decks9 decks
11%synergy
Cacophony Unleashed
11%inclusion1 decks9 decks
9%synergy
Trapped in the Screen
11%inclusion1 decks9 decks
11%synergy
Monastery Siege
11%inclusion1 decks9 decks
10%synergy
Court of Cunning
11%inclusion1 decks9 decks
10%synergy
Capture Sphere
11%inclusion1 decks9 decks
11%synergy
Dissipation Field
11%inclusion1 decks9 decks
10%synergy
Utility Lands
Bojuka Bog
44%inclusion4 decks9 decks
17%synergy
Hall of Heliod's Generosity
44%inclusion4 decks9 decks
31%synergy
Halimar Depths
22%inclusion2 decks9 decks
17%synergy
Ishgard, the Holy See
14%inclusion1 decks7 decks
11%synergy
Mystic Sanctuary
11%inclusion1 decks9 decks
7%synergy
Dalkovan Encampment
11%inclusion1 decks9 decks
11%synergy
Windbrisk Heights
11%inclusion1 decks9 decks
10%synergy
Restless Anchorage
11%inclusion1 decks9 decks
10%synergy
Drownyard Temple
11%inclusion1 decks9 decks
11%synergy
Cephalid Coliseum
11%inclusion1 decks9 decks
8%synergy
Dakmor Salvage
11%inclusion1 decks9 decks
11%synergy
Vault of the Archangel
11%inclusion1 decks9 decks
5%synergy
Mana Artifacts
Arcane Signet
78%inclusion7 decks9 decks
-10%synergy
Sol Ring
67%inclusion6 decks9 decks
-23%synergy
Orzhov Signet
67%inclusion6 decks9 decks
32%synergy
Azorius Signet
67%inclusion6 decks9 decks
34%synergy
Talisman of Progress
44%inclusion4 decks9 decks
2%synergy
Talisman of Dominance
44%inclusion4 decks9 decks
-5%synergy
Fellwar Stone
44%inclusion4 decks9 decks
11%synergy
Dimir Signet
33%inclusion3 decks9 decks
1%synergy
Talisman of Hierarchy
33%inclusion3 decks9 decks
-10%synergy
Mind Stone
33%inclusion3 decks9 decks
20%synergy
Commander's Sphere
22%inclusion2 decks9 decks
3%synergy
Unstable Obelisk
11%inclusion1 decks9 decks
11%synergy
Silumgar Monument
11%inclusion1 decks9 decks
11%synergy
Spectral Searchlight
11%inclusion1 decks9 decks
11%synergy
Orzhov Keyrune
11%inclusion1 decks9 decks
11%synergy
Obelisk of Esper
11%inclusion1 decks9 decks
10%synergy
Star Compass
11%inclusion1 decks9 decks
11%synergy
Manalith
11%inclusion1 decks9 decks
11%synergy
Lands
Swamp
100%inclusion9 decks9 decks
9%synergy
Island
100%inclusion9 decks9 decks
7%synergy
Plains
100%inclusion9 decks9 decks
9%synergy
Command Tower
89%inclusion8 decks9 decks
-4%synergy
Arcane Sanctum
89%inclusion8 decks9 decks
34%synergy
Glacial Fortress
56%inclusion5 decks9 decks
16%synergy
Exotic Orchard
56%inclusion5 decks9 decks
-3%synergy
Prairie Stream
56%inclusion5 decks9 decks
15%synergy
Evolving Wilds
56%inclusion5 decks9 decks
30%synergy
Sunken Hollow
56%inclusion5 decks9 decks
16%synergy
Contaminated Landscape
44%inclusion4 decks9 decks
30%synergy
Temple of Deceit
44%inclusion4 decks9 decks
26%synergy
Caves of Koilos
44%inclusion4 decks9 decks
9%synergy
Isolated Chapel
44%inclusion4 decks9 decks
6%synergy
Temple of Enlightenment
44%inclusion4 decks9 decks
28%synergy
Adarkar Wastes
44%inclusion4 decks9 decks
14%synergy
Temple of Silence
44%inclusion4 decks9 decks
25%synergy
Tainted Isle
33%inclusion3 decks9 decks
27%synergy
Terramorphic Expanse
33%inclusion3 decks9 decks
17%synergy
Dimir Aqueduct
33%inclusion3 decks9 decks
19%synergy
Tainted Field
33%inclusion3 decks9 decks
26%synergy
Ash Barrens
33%inclusion3 decks9 decks
23%synergy
Underground River
33%inclusion3 decks9 decks
1%synergy
Azorius Chancery
22%inclusion2 decks9 decks
8%synergy
Irrigated Farmland
22%inclusion2 decks9 decks
15%synergy
Fetid Heath
22%inclusion2 decks9 decks
11%synergy
Port Town
22%inclusion2 decks9 decks
5%synergy
Darkwater Catacombs
22%inclusion2 decks9 decks
8%synergy
Valgavoth's Lair
22%inclusion2 decks9 decks
19%synergy
Skycloud Expanse
22%inclusion2 decks9 decks
7%synergy
Drowned Catacomb
22%inclusion2 decks9 decks
-13%synergy
Path of Ancestry
22%inclusion2 decks9 decks
-5%synergy
Shineshadow Snarl
22%inclusion2 decks9 decks
12%synergy
Idyllic Beachfront
11%inclusion1 decks9 decks
7%synergy
Fabled Passage
11%inclusion1 decks9 decks
4%synergy
Waterfront District
11%inclusion1 decks9 decks
10%synergy
Myriad Landscape
11%inclusion1 decks9 decks
2%synergy
Silverquill Campus
11%inclusion1 decks9 decks
11%synergy
Glasswing Grace
11%inclusion1 decks9 decks
8%synergy
Desolate Mire
11%inclusion1 decks9 decks
5%synergy
Skybridge Towers
11%inclusion1 decks9 decks
10%synergy
Spire of Industry
11%inclusion1 decks9 decks
3%synergy
Hydroelectric Specimen
11%inclusion1 decks9 decks
8%synergy
Tranquil Cove
11%inclusion1 decks9 decks
5%synergy
Thriving Isle
11%inclusion1 decks9 decks
7%synergy
Boggart Trawler
11%inclusion1 decks9 decks
8%synergy
Study
11%inclusion1 decks9 decks
11%synergy
River of Tears
11%inclusion1 decks9 decks
9%synergy
Maestros Theater
11%inclusion1 decks9 decks
11%synergy
Sunlit Marsh
11%inclusion1 decks9 decks
7%synergy
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