The Master of Keys (Commander) - Budget Core

The Master of Keys
Rank #300
42decks
As CommanderAs CardAverage DeckDecksView Precon
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Budget
Any$$$$
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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Enchantments
Battles
Utility Lands
Mana Artifacts
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Primary Research
20%inclusion1 decks5 decks
20%synergy
Retro-Mutation
10%inclusion1 decks10 decks
10%synergy
Dimensional Exile
9.1%inclusion1 decks11 decks
9%synergy
Killian, Decisive Mentor
7.7%inclusion1 decks13 decks
7%synergy
High Synergy Cards
Inquisitive Glimmer
76%inclusion32 decks42 decks
69%synergy
Scrabbling Skullcrab
62%inclusion26 decks42 decks
61%synergy
Mesa Enchantress
67%inclusion28 decks42 decks
58%synergy
Cemetery Tampering
52%inclusion22 decks42 decks
52%synergy
Gravebreaker Lamia
50%inclusion21 decks42 decks
49%synergy
Seal of Cleansing
50%inclusion21 decks42 decks
49%synergy
Demon of Fate's Design
52%inclusion22 decks42 decks
47%synergy
Starfield Mystic
52%inclusion22 decks42 decks
46%synergy
Defiled Crypt // Cadaver Lab
45%inclusion19 decks42 decks
45%synergy
Doomwake Giant
48%inclusion20 decks42 decks
42%synergy
Top Cards
Entity Tracker
48%inclusion20 decks42 decks
42%synergy
Victor, Valgavoth's Seneschal
43%inclusion18 decks42 decks
41%synergy
Sigil of the Empty Throne
40%inclusion17 decks42 decks
35%synergy
Unable to Scream
40%inclusion17 decks42 decks
39%synergy
Stillness in Motion
39%inclusion11 decks28 decks
39%synergy
Singularity Rupture
39%inclusion9 decks23 decks
37%synergy
Sage of Mysteries
38%inclusion16 decks42 decks
38%synergy
Ethereal Armor
38%inclusion16 decks42 decks
33%synergy
Fear of Impostors
36%inclusion15 decks42 decks
34%synergy
Ghostly Dancers
36%inclusion15 decks42 decks
33%synergy
Creatures
Skullsnap Nuisance
36%inclusion15 decks42 decks
35%synergy
Fear of Sleep Paralysis
31%inclusion13 decks42 decks
26%synergy
Mindwrack Harpy
31%inclusion13 decks42 decks
31%synergy
Soaring Lightbringer
26%inclusion11 decks42 decks
22%synergy
Gremlin Tamer
26%inclusion11 decks42 decks
25%synergy
Alseid of Life's Bounty
26%inclusion11 decks42 decks
25%synergy
Zur the Enchanter
26%inclusion11 decks42 decks
21%synergy
Fear of Infinity
24%inclusion10 decks42 decks
23%synergy
Archon of Sun's Grace
24%inclusion10 decks42 decks
19%synergy
Fear of Surveillance
24%inclusion10 decks42 decks
24%synergy
Appendage Amalgam
24%inclusion10 decks42 decks
24%synergy
Grim Guardian
24%inclusion10 decks42 decks
21%synergy
Silent Hallcreeper
24%inclusion10 decks42 decks
19%synergy
Balemurk Leech
24%inclusion10 decks42 decks
23%synergy
Millikin
24%inclusion10 decks42 decks
23%synergy
Starnheim Courser
21%inclusion9 decks42 decks
18%synergy
Moon-Blessed Cleric
21%inclusion9 decks42 decks
17%synergy
Heliod, the Radiant Dawn
21%inclusion9 decks42 decks
18%synergy
Spirited Companion
19%inclusion8 decks42 decks
17%synergy
Aminatou, Veil Piercer
19%inclusion8 decks42 decks
18%synergy
Fear of Isolation
17%inclusion7 decks42 decks
16%synergy
Summon: Yojimbo
15%inclusion4 decks27 decks
14%synergy
Fear of Lost Teeth
14%inclusion6 decks42 decks
14%synergy
Archetype of Imagination
14%inclusion6 decks42 decks
10%synergy
Nashi, Searcher in the Dark
14%inclusion6 decks42 decks
14%synergy
Ondu Spiritdancer
14%inclusion6 decks42 decks
8%synergy
Callaphe, Beloved of the Sea
14%inclusion6 decks42 decks
13%synergy
Creeping Peeper
14%inclusion6 decks42 decks
14%synergy
Optimistic Scavenger
12%inclusion5 decks42 decks
12%synergy
Overlord of the Floodpits
12%inclusion5 decks42 decks
8%synergy
Ashiok's Reaper
12%inclusion5 decks42 decks
12%synergy
Fear of the Dark
12%inclusion5 decks42 decks
12%synergy
Zur, Eternal Schemer
12%inclusion5 decks42 decks
9%synergy
Ajani's Chosen
12%inclusion5 decks42 decks
11%synergy
Deranged Assistant
12%inclusion5 decks42 decks
12%synergy
Summon: Primal Odin
11%inclusion3 decks27 decks
7%synergy
Solemn Simulacrum
10%inclusion4 decks42 decks
-4%synergy
Indebted Spirit
10%inclusion4 decks42 decks
9%synergy
Stitcher's Supplier
10%inclusion4 decks42 decks
9%synergy
Auramancer
10%inclusion4 decks42 decks
7%synergy
Transcendent Envoy
10%inclusion4 decks42 decks
8%synergy
Summon: Shiva
9.1%inclusion3 decks33 decks
9%synergy
Dreadwing Scavenger
7.7%inclusion3 decks39 decks
7%synergy
Emet-Selch of the Third Seat
7.4%inclusion2 decks27 decks
-2%synergy
Fear of Falling
7.1%inclusion3 decks42 decks
7%synergy
Patrician Geist
7.1%inclusion3 decks42 decks
7%synergy
The Mindskinner
7.1%inclusion3 decks42 decks
6%synergy
Fear of Failed Tests
7.1%inclusion3 decks42 decks
7%synergy
Spectral Snatcher
7.1%inclusion3 decks42 decks
7%synergy
Nighthowler
7.1%inclusion3 decks42 decks
7%synergy
Instants
Swords to Plowshares
26%inclusion11 decks42 decks
-42%synergy
Negate
24%inclusion10 decks42 decks
7%synergy
Fact or Fiction
24%inclusion10 decks42 decks
20%synergy
Thirst for Meaning
24%inclusion10 decks42 decks
22%synergy
Otherworldly Gaze
21%inclusion9 decks42 decks
19%synergy
Path to Exile
21%inclusion9 decks42 decks
-21%synergy
Void Rend
17%inclusion7 decks42 decks
-18%synergy
Frantic Search
14%inclusion6 decks42 decks
-4%synergy
Rowan's Grim Search
14%inclusion6 decks42 decks
14%synergy
Refute
10%inclusion4 decks40 decks
7%synergy
Drown in the Loch
10%inclusion4 decks42 decks
8%synergy
Forbidden Alchemy
10%inclusion4 decks42 decks
9%synergy
Unwanted Remake
10%inclusion4 decks42 decks
9%synergy
Swallowed by Leviathan
8.0%inclusion2 decks25 decks
7%synergy
Dreams of Laguna
7.7%inclusion2 decks26 decks
7%synergy
Jump Scare
7.1%inclusion3 decks42 decks
7%synergy
Get Out
7.1%inclusion3 decks42 decks
7%synergy
Utter End
7.1%inclusion3 decks42 decks
1%synergy
Drown in Dreams
7.1%inclusion3 decks42 decks
7%synergy
Live or Die
7.1%inclusion3 decks42 decks
7%synergy
Mortify
7.1%inclusion3 decks42 decks
-2%synergy
Thought Scour
7.1%inclusion3 decks42 decks
6%synergy
Don't Make a Sound
7.1%inclusion3 decks42 decks
7%synergy
Sorceries
Sevinne's Reclamation
29%inclusion12 decks42 decks
20%synergy
Extinguish All Hope
24%inclusion10 decks42 decks
22%synergy
Space-Time Anomaly
22%inclusion5 decks23 decks
20%synergy
Redress Fate
21%inclusion9 decks42 decks
16%synergy
Open the Vaults
17%inclusion7 decks42 decks
15%synergy
Time Wipe
17%inclusion7 decks42 decks
10%synergy
Final Vengeance
14%inclusion6 decks42 decks
14%synergy
Dance of the Manse
14%inclusion6 decks42 decks
11%synergy
Damn
12%inclusion5 decks42 decks
-8%synergy
Resurgent Belief
10%inclusion4 decks42 decks
8%synergy
Inspiration from Beyond
7.5%inclusion3 decks40 decks
7%synergy
Commune with Evil
7.1%inclusion3 decks42 decks
7%synergy
Austere Command
7.1%inclusion3 decks42 decks
-1%synergy
Unmarked Grave
7.1%inclusion3 decks42 decks
6%synergy
Tome Scour
7.1%inclusion3 decks42 decks
7%synergy
Night's Whisper
7.1%inclusion3 decks42 decks
5%synergy
Brilliant Restoration
7.1%inclusion3 decks42 decks
5%synergy
Diresight
7.1%inclusion3 decks42 decks
7%synergy
Painful Truths
7.1%inclusion3 decks42 decks
5%synergy
Notion Rain
7.1%inclusion3 decks42 decks
7%synergy
Compulsive Research
7.1%inclusion3 decks42 decks
7%synergy
Utility Artifacts
Wayfarer's Bauble
17%inclusion7 decks42 decks
9%synergy
Perpetual Timepiece
14%inclusion6 decks42 decks
14%synergy
Matzalantli, the Great Door
7.1%inclusion3 decks42 decks
5%synergy
Cloud Key
7.1%inclusion3 decks42 decks
4%synergy
The Everflowing Well
7.1%inclusion3 decks42 decks
7%synergy
Keys to the House
7.1%inclusion3 decks42 decks
7%synergy
Enchantments
All That Glitters
33%inclusion14 decks42 decks
25%synergy
Seal of Doom
33%inclusion14 decks42 decks
33%synergy
Grasp of Fate
31%inclusion13 decks42 decks
25%synergy
Secrets of the Dead
31%inclusion13 decks42 decks
31%synergy
Seal of Removal
31%inclusion13 decks42 decks
30%synergy
The Tale of Tamiyo
31%inclusion13 decks42 decks
31%synergy
Imprisoned in the Moon
29%inclusion12 decks42 decks
22%synergy
Estrid's Invocation
29%inclusion12 decks42 decks
24%synergy
Restricted Office // Lecture Hall
29%inclusion12 decks42 decks
27%synergy
Derelict Attic // Widow's Walk
29%inclusion12 decks42 decks
28%synergy
Cacophony Unleashed
26%inclusion11 decks42 decks
24%synergy
The Eldest Reborn
26%inclusion11 decks42 decks
24%synergy
Dress Down
26%inclusion11 decks42 decks
24%synergy
Bottomless Pool // Locker Room
24%inclusion10 decks42 decks
22%synergy
Propaganda
21%inclusion9 decks42 decks
-7%synergy
Underwater Tunnel // Slimy Aquarium
19%inclusion8 decks42 decks
19%synergy
Glasswing Grace
19%inclusion8 decks42 decks
16%synergy
Soul Snare
19%inclusion8 decks42 decks
19%synergy
Surgical Suite // Hospital Room
19%inclusion8 decks42 decks
19%synergy
Ballad of the Black Flag
19%inclusion8 decks42 decks
19%synergy
Meat Locker // Drowned Diner
19%inclusion8 decks42 decks
19%synergy
King Narfi's Betrayal
17%inclusion7 decks42 decks
16%synergy
Shardmage's Rescue
17%inclusion7 decks42 decks
16%synergy
Mirrormade
17%inclusion7 decks42 decks
7%synergy
Secret Arcade // Dusty Parlor
17%inclusion7 decks42 decks
12%synergy
Cast Out
17%inclusion7 decks42 decks
14%synergy
Polluted Cistern // Dim Oubliette
17%inclusion7 decks42 decks
16%synergy
Darksteel Mutation
14%inclusion6 decks42 decks
8%synergy
Ripples of Undeath
14%inclusion6 decks42 decks
12%synergy
Extravagant Replication
14%inclusion6 decks42 decks
9%synergy
Hopeless Nightmare
14%inclusion6 decks42 decks
14%synergy
Utter Insignificance
14%inclusion6 decks42 decks
14%synergy
Shark Typhoon
14%inclusion6 decks42 decks
8%synergy
Central Elevator // Promising Stairs
14%inclusion6 decks42 decks
14%synergy
Amphibian Downpour
14%inclusion6 decks42 decks
10%synergy
Vessel of Paramnesia
14%inclusion6 decks42 decks
14%synergy
Sphere of Safety
14%inclusion6 decks42 decks
5%synergy
Witness Protection
14%inclusion6 decks42 decks
12%synergy
Minimus Containment
12%inclusion5 decks42 decks
11%synergy
Cramped Vents // Access Maze
12%inclusion5 decks42 decks
10%synergy
Trapped in the Screen
12%inclusion5 decks42 decks
11%synergy
Genesis of the Daleks
12%inclusion5 decks42 decks
12%synergy
Elspeth Conquers Death
12%inclusion5 decks42 decks
11%synergy
The Restoration of Eiganjo
12%inclusion5 decks42 decks
11%synergy
Touch the Spirit Realm
12%inclusion5 decks42 decks
10%synergy
Nowhere to Run
12%inclusion5 decks42 decks
11%synergy
Phyrexian Arena
12%inclusion5 decks42 decks
-2%synergy
Sheltered by Ghosts
12%inclusion5 decks42 decks
9%synergy
The Birth of Meletis
10%inclusion4 decks42 decks
9%synergy
Curse of Silence
10%inclusion4 decks42 decks
9%synergy
Battles
Invasion of Theros
17%inclusion7 decks42 decks
15%synergy
Utility Lands
Bojuka Bog
24%inclusion10 decks42 decks
-3%synergy
Hall of Heliod's Generosity
12%inclusion5 decks42 decks
-1%synergy
Nephalia Drownyard
10%inclusion4 decks42 decks
9%synergy
Ishgard, the Holy See
7.4%inclusion2 decks27 decks
4%synergy
Cephalid Coliseum
7.1%inclusion3 decks42 decks
4%synergy
Mana Artifacts
Arcane Signet
69%inclusion29 decks42 decks
-19%synergy
Sol Ring
60%inclusion25 decks42 decks
-30%synergy
Azorius Signet
48%inclusion20 decks42 decks
17%synergy
Dimir Signet
45%inclusion19 decks42 decks
15%synergy
Orzhov Signet
43%inclusion18 decks42 decks
11%synergy
Talisman of Progress
31%inclusion13 decks42 decks
-13%synergy
Talisman of Hierarchy
29%inclusion12 decks42 decks
-16%synergy
Talisman of Dominance
26%inclusion11 decks42 decks
-24%synergy
Commander's Sphere
21%inclusion9 decks42 decks
4%synergy
Mind Stone
17%inclusion7 decks42 decks
5%synergy
Fellwar Stone
17%inclusion7 decks42 decks
-17%synergy
Obelisk of Esper
7.1%inclusion3 decks42 decks
6%synergy
Lands
Island
100%inclusion42 decks42 decks
7%synergy
Swamp
98%inclusion41 decks42 decks
6%synergy
Plains
98%inclusion41 decks42 decks
6%synergy
Command Tower
81%inclusion34 decks42 decks
-12%synergy
Arcane Sanctum
57%inclusion24 decks42 decks
3%synergy
Exotic Orchard
55%inclusion23 decks42 decks
-4%synergy
Contaminated Landscape
55%inclusion23 decks42 decks
41%synergy
Terramorphic Expanse
48%inclusion20 decks42 decks
32%synergy
Prairie Stream
45%inclusion19 decks42 decks
5%synergy
Evolving Wilds
43%inclusion18 decks42 decks
18%synergy
Temple of Enlightenment
40%inclusion17 decks42 decks
25%synergy
Glacial Fortress
38%inclusion16 decks42 decks
-4%synergy
Sunken Hollow
38%inclusion16 decks42 decks
-2%synergy
Isolated Chapel
33%inclusion14 decks42 decks
-8%synergy
Temple of Silence
33%inclusion14 decks42 decks
15%synergy
Temple of Deceit
31%inclusion13 decks42 decks
14%synergy
Shineshadow Snarl
31%inclusion13 decks42 decks
20%synergy
Obscura Storefront
31%inclusion13 decks42 decks
21%synergy
Caves of Koilos
29%inclusion12 decks42 decks
-7%synergy
Choked Estuary
29%inclusion12 decks42 decks
12%synergy
Tainted Field
26%inclusion11 decks42 decks
19%synergy
Port Town
26%inclusion11 decks42 decks
9%synergy
Adarkar Wastes
26%inclusion11 decks42 decks
-6%synergy
Tainted Isle
24%inclusion10 decks42 decks
17%synergy
Dimir Aqueduct
24%inclusion10 decks42 decks
11%synergy
Myriad Landscape
21%inclusion9 decks42 decks
14%synergy
Azorius Chancery
21%inclusion9 decks42 decks
8%synergy
Skycloud Expanse
21%inclusion9 decks42 decks
6%synergy
Orzhov Basilica
21%inclusion9 decks42 decks
6%synergy
Path of Ancestry
21%inclusion9 decks42 decks
-6%synergy
Glasswing Grace
19%inclusion8 decks42 decks
16%synergy
Irrigated Farmland
19%inclusion8 decks42 decks
12%synergy
Drowned Catacomb
19%inclusion8 decks42 decks
-19%synergy
Underground River
19%inclusion8 decks42 decks
-15%synergy
Darkwater Catacombs
19%inclusion8 decks42 decks
4%synergy
Valgavoth's Lair
19%inclusion8 decks42 decks
16%synergy
Tranquil Cove
17%inclusion7 decks42 decks
11%synergy
Fetid Pools
14%inclusion6 decks42 decks
8%synergy
Fetid Heath
14%inclusion6 decks42 decks
1%synergy
Ash Barrens
12%inclusion5 decks42 decks
1%synergy
Scoured Barrens
12%inclusion5 decks42 decks
6%synergy
Escape Tunnel
10%inclusion4 decks42 decks
9%synergy
Desolate Mire
10%inclusion4 decks42 decks
3%synergy
Thriving Moor
10%inclusion4 decks42 decks
5%synergy
Esper Panorama
10%inclusion4 decks42 decks
6%synergy
Dismal Backwater
10%inclusion4 decks42 decks
3%synergy
Sunlit Marsh
10%inclusion4 decks42 decks
5%synergy
Vibrant Cityscape
10%inclusion2 decks21 decks
9%synergy
Thriving Isle
7.1%inclusion3 decks42 decks
3%synergy
River of Tears
7.1%inclusion3 decks42 decks
5%synergy
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