The Master of Keys (Commander) - Budget

The Master of Keys
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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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Instants
Sorceries
Utility Artifacts
Enchantments
Battles
Utility Lands
Mana Artifacts
Lands
Back to Top
Noggle the Mind
10%inclusion12 decks121 decks
9%synergy
Aquitect's Defenses
4.1%inclusion5 decks121 decks
4%synergy
Foot Headquarters
3.4%inclusion2 decks59 decks
3%synergy
Twilight Diviner
3.3%inclusion4 decks121 decks
2%synergy
Dimensional Exile
3.3%inclusion2 decks61 decks
3%synergy
High Synergy Cards
Inquisitive Glimmer
71%inclusion517 decks728 decks
64%synergy
Mesa Enchantress
70%inclusion512 decks728 decks
61%synergy
Starfield Mystic
67%inclusion486 decks728 decks
60%synergy
Demon of Fate's Design
62%inclusion451 decks728 decks
57%synergy
Doomwake Giant
61%inclusion442 decks728 decks
55%synergy
Fear of Sleep Paralysis
58%inclusion419 decks728 decks
52%synergy
Sigil of the Empty Throne
57%inclusion413 decks728 decks
51%synergy
Scrabbling Skullcrab
51%inclusion369 decks728 decks
50%synergy
Gravebreaker Lamia
50%inclusion361 decks728 decks
49%synergy
Victor, Valgavoth's Seneschal
49%inclusion356 decks728 decks
47%synergy
Top Cards
Entity Tracker
53%inclusion387 decks728 decks
47%synergy
Secret Arcade // Dusty Parlor
50%inclusion362 decks728 decks
45%synergy
Redress Fate
49%inclusion354 decks728 decks
43%synergy
Mirrormade
47%inclusion342 decks728 decks
37%synergy
Sphere of Safety
47%inclusion339 decks728 decks
37%synergy
Swords to Plowshares
46%inclusion335 decks728 decks
-22%synergy
Fear of Impostors
42%inclusion309 decks728 decks
41%synergy
Ondu Spiritdancer
42%inclusion308 decks728 decks
36%synergy
Moon-Blessed Cleric
42%inclusion304 decks728 decks
37%synergy
Defiled Crypt // Cadaver Lab
42%inclusion303 decks727 decks
41%synergy
Creatures
Soaring Lightbringer
42%inclusion303 decks728 decks
37%synergy
Ghostly Dancers
39%inclusion285 decks728 decks
37%synergy
Aminatou, Veil Piercer
37%inclusion267 decks728 decks
35%synergy
Archetype of Imagination
30%inclusion217 decks728 decks
25%synergy
Athreos, Shroud-Veiled
30%inclusion216 decks728 decks
25%synergy
Skullsnap Nuisance
27%inclusion195 decks728 decks
26%synergy
Zur the Enchanter
26%inclusion190 decks728 decks
21%synergy
Archon of Sun's Grace
25%inclusion182 decks728 decks
20%synergy
Silent Hallcreeper
24%inclusion178 decks728 decks
20%synergy
Grim Guardian
24%inclusion177 decks728 decks
22%synergy
Fear of Infinity
24%inclusion173 decks728 decks
23%synergy
Overlord of the Floodpits
23%inclusion165 decks728 decks
19%synergy
Sage of Mysteries
22%inclusion159 decks728 decks
22%synergy
Balemurk Leech
22%inclusion157 decks728 decks
21%synergy
Ancient Cellarspawn
21%inclusion152 decks728 decks
18%synergy
Mindwrack Harpy
21%inclusion150 decks728 decks
20%synergy
Heliod, the Radiant Dawn
20%inclusion149 decks728 decks
17%synergy
Gremlin Tamer
20%inclusion143 decks728 decks
19%synergy
Nightmare Shepherd
19%inclusion137 decks728 decks
16%synergy
Auramancer
18%inclusion134 decks728 decks
15%synergy
Solemn Simulacrum
18%inclusion129 decks728 decks
4%synergy
Alseid of Life's Bounty
17%inclusion124 decks728 decks
16%synergy
Fear of Surveillance
16%inclusion117 decks728 decks
16%synergy
Spirited Companion
16%inclusion115 decks728 decks
14%synergy
Zur, Eternal Schemer
15%inclusion110 decks728 decks
12%synergy
Enduring Curiosity
14%inclusion105 decks728 decks
6%synergy
Starnheim Courser
13%inclusion96 decks728 decks
9%synergy
Nashi, Searcher in the Dark
13%inclusion96 decks728 decks
13%synergy
Metamorphosis Fanatic
12%inclusion85 decks728 decks
7%synergy
Appendage Amalgam
12%inclusion84 decks728 decks
11%synergy
Arvinox, the Mind Flail
11%inclusion79 decks728 decks
9%synergy
Creeping Peeper
11%inclusion78 decks728 decks
11%synergy
Fear of the Dark
10%inclusion76 decks728 decks
10%synergy
Burnished Hart
10%inclusion70 decks728 decks
6%synergy
Millikin
9.5%inclusion69 decks728 decks
9%synergy
Ghostly Keybearer
9.1%inclusion66 decks728 decks
9%synergy
Optimistic Scavenger
9.1%inclusion66 decks728 decks
9%synergy
Fear of Lost Teeth
8.9%inclusion65 decks728 decks
9%synergy
Phenomenon Investigators
8.9%inclusion65 decks728 decks
8%synergy
Fear of Isolation
8.0%inclusion58 decks728 decks
8%synergy
Fear of Failed Tests
8.0%inclusion58 decks728 decks
8%synergy
Verge Rangers
8.0%inclusion58 decks728 decks
7%synergy
Dream Eater
7.3%inclusion53 decks728 decks
7%synergy
Fear of Immobility
7.3%inclusion53 decks728 decks
7%synergy
Stitcher's Supplier
7.1%inclusion52 decks728 decks
6%synergy
Stenn, Paranoid Partisan
6.7%inclusion49 decks728 decks
5%synergy
Underworld Coinsmith
6.2%inclusion45 decks728 decks
5%synergy
Overlord of the Mistmoors
5.9%inclusion43 decks728 decks
4%synergy
Fear of Falling
5.8%inclusion42 decks728 decks
6%synergy
Summon: Primal Odin
5.7%inclusion24 decks420 decks
1%synergy
Instants
Thirst for Meaning
40%inclusion288 decks728 decks
38%synergy
Otherworldly Gaze
31%inclusion226 decks728 decks
29%synergy
Arcane Denial
29%inclusion212 decks728 decks
9%synergy
Path to Exile
25%inclusion179 decks728 decks
-18%synergy
Counterspell
23%inclusion165 decks728 decks
-19%synergy
Negate
21%inclusion153 decks728 decks
5%synergy
Void Rend
19%inclusion139 decks728 decks
-15%synergy
Utter End
18%inclusion128 decks728 decks
11%synergy
Inkshield
17%inclusion127 decks728 decks
8%synergy
Frantic Search
17%inclusion126 decks728 decks
0%synergy
Brainstorm
16%inclusion117 decks728 decks
-1%synergy
Return to Dust
12%inclusion88 decks728 decks
9%synergy
Fact or Fiction
10%inclusion70 decks728 decks
6%synergy
Telling Time
8.8%inclusion64 decks728 decks
7%synergy
An Offer You Can't Refuse
8.1%inclusion59 decks728 decks
-19%synergy
Don't Make a Sound
7.3%inclusion53 decks726 decks
7%synergy
Glimmerburst
6.7%inclusion49 decks726 decks
6%synergy
Get Out
6.3%inclusion46 decks728 decks
6%synergy
Generous Gift
6.3%inclusion46 decks728 decks
-8%synergy
Dovin's Veto
6.2%inclusion45 decks728 decks
-19%synergy
Dark Ritual
6.0%inclusion44 decks728 decks
-14%synergy
Sorceries
Time Wipe
31%inclusion225 decks728 decks
24%synergy
Sevinne's Reclamation
30%inclusion218 decks728 decks
21%synergy
Extinguish All Hope
27%inclusion199 decks728 decks
26%synergy
Dance of the Manse
23%inclusion165 decks728 decks
19%synergy
Singularity Rupture
19%inclusion67 decks347 decks
17%synergy
Ponder
15%inclusion106 decks728 decks
5%synergy
Terminus
14%inclusion99 decks728 decks
10%synergy
Read the Bones
12%inclusion89 decks728 decks
8%synergy
Resurgent Belief
12%inclusion89 decks728 decks
10%synergy
Diabolic Vision
9.5%inclusion69 decks728 decks
7%synergy
Portent
8.8%inclusion64 decks728 decks
5%synergy
Aminatou's Augury
8.2%inclusion60 decks728 decks
7%synergy
Space-Time Anomaly
8.0%inclusion27 decks336 decks
6%synergy
Final Vengeance
7.1%inclusion52 decks728 decks
7%synergy
Open the Vaults
7.0%inclusion51 decks728 decks
6%synergy
Demonic Counsel
6.7%inclusion49 decks728 decks
6%synergy
Austere Command
6.6%inclusion48 decks728 decks
-2%synergy
Windfall
6.2%inclusion45 decks728 decks
-7%synergy
Supreme Verdict
5.6%inclusion41 decks728 decks
-9%synergy
Entreat the Angels
5.6%inclusion41 decks728 decks
4%synergy
Glimpse the Unthinkable
5.5%inclusion40 decks728 decks
5%synergy
Damn
5.1%inclusion37 decks728 decks
-15%synergy
Utility Artifacts
Keys to the House
15%inclusion112 decks727 decks
15%synergy
Wayfarer's Bauble
11%inclusion77 decks728 decks
3%synergy
Cloud Key
10%inclusion73 decks728 decks
7%synergy
Swiftfoot Boots
9.3%inclusion68 decks728 decks
-15%synergy
Perpetual Timepiece
5.8%inclusion42 decks728 decks
5%synergy
Enchantments
Bottomless Pool // Locker Room
41%inclusion301 decks728 decks
39%synergy
Cemetery Tampering
40%inclusion290 decks728 decks
39%synergy
Seal of Cleansing
38%inclusion273 decks728 decks
36%synergy
Ethereal Armor
36%inclusion262 decks728 decks
31%synergy
Extravagant Replication
34%inclusion251 decks728 decks
29%synergy
Timely Ward
34%inclusion248 decks728 decks
29%synergy
Cramped Vents // Access Maze
33%inclusion241 decks728 decks
31%synergy
Shark Typhoon
33%inclusion240 decks728 decks
27%synergy
All That Glitters
31%inclusion227 decks728 decks
22%synergy
Monologue Tax
31%inclusion226 decks728 decks
25%synergy
The Eldest Reborn
30%inclusion221 decks728 decks
28%synergy
Dress Down
30%inclusion219 decks728 decks
28%synergy
Restricted Office // Lecture Hall
30%inclusion217 decks728 decks
28%synergy
Grasp of Fate
30%inclusion215 decks728 decks
23%synergy
Propaganda
28%inclusion205 decks728 decks
0%synergy
Central Elevator // Promising Stairs
26%inclusion187 decks728 decks
25%synergy
Ripples of Undeath
26%inclusion186 decks728 decks
23%synergy
Cacophony Unleashed
24%inclusion178 decks728 decks
23%synergy
Derelict Attic // Widow's Walk
23%inclusion170 decks726 decks
23%synergy
One with the Multiverse
23%inclusion168 decks728 decks
18%synergy
The Tale of Tamiyo
23%inclusion166 decks728 decks
22%synergy
Meat Locker // Drowned Diner
23%inclusion165 decks726 decks
22%synergy
Estrid's Invocation
22%inclusion163 decks728 decks
18%synergy
Stillness in Motion
22%inclusion108 decks483 decks
22%synergy
Imprisoned in the Moon
22%inclusion158 decks728 decks
15%synergy
Dazzling Theater // Prop Room
21%inclusion151 decks727 decks
19%synergy
Seal of Removal
20%inclusion149 decks728 decks
20%synergy
Polluted Cistern // Dim Oubliette
20%inclusion147 decks728 decks
20%synergy
Cast Out
20%inclusion143 decks728 decks
17%synergy
Underwater Tunnel // Slimy Aquarium
19%inclusion138 decks727 decks
19%synergy
Surgical Suite // Hospital Room
19%inclusion136 decks728 decks
18%synergy
Secrets of the Dead
18%inclusion129 decks728 decks
17%synergy
Mirror Room // Fractured Realm
17%inclusion124 decks728 decks
15%synergy
Unable to Scream
17%inclusion123 decks728 decks
16%synergy
Amphibian Downpour
16%inclusion118 decks728 decks
12%synergy
Spirit-Sister's Call
16%inclusion113 decks728 decks
14%synergy
Ghostly Prison
15%inclusion109 decks728 decks
-7%synergy
Copy Enchantment
15%inclusion109 decks728 decks
10%synergy
Darksteel Mutation
15%inclusion107 decks728 decks
9%synergy
Phyrexian Arena
14%inclusion101 decks728 decks
0%synergy
Animate Dead
14%inclusion100 decks728 decks
4%synergy
Seal of Doom
13%inclusion97 decks728 decks
13%synergy
Funeral Room // Awakening Hall
13%inclusion95 decks728 decks
12%synergy
Unholy Annex // Ritual Chamber
13%inclusion94 decks728 decks
12%synergy
Sheltered by Ghosts
12%inclusion86 decks728 decks
9%synergy
Trapped in the Screen
12%inclusion85 decks728 decks
11%synergy
Nowhere to Run
12%inclusion85 decks728 decks
10%synergy
Life Insurance
11%inclusion81 decks728 decks
10%synergy
Soul Snare
11%inclusion78 decks728 decks
10%synergy
Witness Protection
9.1%inclusion66 decks728 decks
7%synergy
Battles
Invasion of Theros
10%inclusion73 decks728 decks
8%synergy
Utility Lands
Bojuka Bog
41%inclusion297 decks728 decks
14%synergy
Hall of Heliod's Generosity
40%inclusion288 decks728 decks
26%synergy
Halimar Depths
23%inclusion165 decks728 decks
18%synergy
Reliquary Tower
8.8%inclusion64 decks728 decks
-25%synergy
Cephalid Coliseum
7.4%inclusion54 decks728 decks
4%synergy
Rogue's Passage
6.5%inclusion47 decks728 decks
-3%synergy
Mana Artifacts
Arcane Signet
83%inclusion601 decks728 decks
-5%synergy
Sol Ring
79%inclusion577 decks728 decks
-11%synergy
Azorius Signet
59%inclusion427 decks728 decks
28%synergy
Orzhov Signet
57%inclusion413 decks728 decks
24%synergy
Dimir Signet
37%inclusion271 decks728 decks
6%synergy
Commander's Sphere
35%inclusion254 decks728 decks
17%synergy
Mind Stone
35%inclusion254 decks728 decks
23%synergy
Talisman of Dominance
29%inclusion209 decks728 decks
-21%synergy
Talisman of Progress
28%inclusion204 decks728 decks
-16%synergy
Talisman of Hierarchy
23%inclusion170 decks728 decks
-21%synergy
Fellwar Stone
19%inclusion135 decks728 decks
-15%synergy
Lands
Island
99%inclusion721 decks728 decks
6%synergy
Swamp
98%inclusion717 decks728 decks
7%synergy
Plains
98%inclusion714 decks728 decks
6%synergy
Command Tower
88%inclusion637 decks728 decks
-5%synergy
Arcane Sanctum
77%inclusion562 decks728 decks
23%synergy
Evolving Wilds
54%inclusion394 decks728 decks
29%synergy
Caves of Koilos
53%inclusion386 decks728 decks
17%synergy
Terramorphic Expanse
53%inclusion385 decks728 decks
37%synergy
Temple of Enlightenment
53%inclusion384 decks728 decks
37%synergy
Temple of Silence
51%inclusion372 decks728 decks
32%synergy
Adarkar Wastes
50%inclusion364 decks728 decks
18%synergy
Temple of Deceit
49%inclusion356 decks728 decks
31%synergy
Obscura Storefront
46%inclusion333 decks728 decks
36%synergy
Exotic Orchard
44%inclusion320 decks728 decks
-15%synergy
Dimir Aqueduct
42%inclusion303 decks728 decks
28%synergy
Azorius Chancery
41%inclusion301 decks728 decks
27%synergy
Underground River
40%inclusion294 decks728 decks
7%synergy
Orzhov Basilica
40%inclusion291 decks728 decks
25%synergy
Prairie Stream
39%inclusion283 decks728 decks
-2%synergy
Tainted Field
38%inclusion275 decks728 decks
31%synergy
Tainted Isle
37%inclusion270 decks728 decks
31%synergy
Sunken Hollow
34%inclusion250 decks728 decks
-5%synergy
Glacial Fortress
32%inclusion230 decks728 decks
-10%synergy
Ash Barrens
30%inclusion217 decks728 decks
19%synergy
Contaminated Landscape
29%inclusion208 decks728 decks
15%synergy
Isolated Chapel
28%inclusion205 decks728 decks
-12%synergy
Thriving Isle
21%inclusion154 decks728 decks
17%synergy
Thriving Heath
21%inclusion152 decks728 decks
17%synergy
Thriving Moor
20%inclusion148 decks728 decks
16%synergy
Valgavoth's Lair
20%inclusion144 decks728 decks
17%synergy
Drowned Catacomb
17%inclusion127 decks728 decks
-20%synergy
Darkwater Catacombs
16%inclusion119 decks728 decks
2%synergy
Skycloud Expanse
16%inclusion117 decks728 decks
1%synergy
Choked Estuary
16%inclusion113 decks728 decks
-1%synergy
Port Town
15%inclusion112 decks728 decks
-2%synergy
Path of Ancestry
15%inclusion109 decks728 decks
-13%synergy
Shineshadow Snarl
13%inclusion92 decks728 decks
2%synergy
Myriad Landscape
12%inclusion87 decks728 decks
4%synergy
Irrigated Farmland
8.4%inclusion61 decks728 decks
1%synergy
Glasswing Grace
7.6%inclusion55 decks728 decks
5%synergy
Tranquil Cove
7.4%inclusion54 decks728 decks
1%synergy
Desolate Mire
7.4%inclusion54 decks728 decks
1%synergy
Abandoned Campground
7.3%inclusion53 decks728 decks
7%synergy
Scoured Barrens
7.1%inclusion52 decks728 decks
1%synergy
Fetid Pools
7.0%inclusion51 decks728 decks
0%synergy
Fetid Heath
6.3%inclusion46 decks728 decks
-6%synergy
Dismal Backwater
6.3%inclusion46 decks728 decks
0%synergy
Neglected Manor
6.2%inclusion45 decks728 decks
6%synergy
Murky Sewer
5.6%inclusion41 decks728 decks
5%synergy
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