The Master of Keys (Commander) - Budget

The Master of Keys
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688decks
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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
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Mornsong Aria
4.4%inclusion3 decks68 decks
4%synergy
Twilight Diviner
3.1%inclusion2 decks64 decks
2%synergy
Liminal Hold
1.6%inclusion1 decks64 decks
1%synergy
Aquitect's Defenses
1.6%inclusion1 decks64 decks
1%synergy
Thirst for Identity
1.6%inclusion1 decks64 decks
1%synergy
High Synergy Cards
Inquisitive Glimmer
71%inclusion486 decks688 decks
63%synergy
Mesa Enchantress
71%inclusion491 decks688 decks
62%synergy
Starfield Mystic
68%inclusion469 decks688 decks
62%synergy
Demon of Fate's Design
63%inclusion431 decks688 decks
57%synergy
Doomwake Giant
62%inclusion428 decks688 decks
56%synergy
Fear of Sleep Paralysis
59%inclusion403 decks688 decks
53%synergy
Sigil of the Empty Throne
58%inclusion396 decks688 decks
52%synergy
Scrabbling Skullcrab
50%inclusion344 decks688 decks
49%synergy
Gravebreaker Lamia
49%inclusion334 decks688 decks
48%synergy
Entity Tracker
52%inclusion359 decks688 decks
46%synergy
Top Cards
Secret Arcade // Dusty Parlor
50%inclusion344 decks688 decks
45%synergy
Redress Fate
49%inclusion338 decks688 decks
43%synergy
Mirrormade
49%inclusion337 decks688 decks
39%synergy
Victor, Valgavoth's Seneschal
48%inclusion329 decks688 decks
46%synergy
Swords to Plowshares
48%inclusion327 decks688 decks
-21%synergy
Sphere of Safety
47%inclusion325 decks688 decks
38%synergy
Ondu Spiritdancer
44%inclusion304 decks688 decks
38%synergy
Moon-Blessed Cleric
43%inclusion295 decks688 decks
38%synergy
Bottomless Pool // Locker Room
42%inclusion291 decks688 decks
40%synergy
Defiled Crypt // Cadaver Lab
42%inclusion286 decks687 decks
41%synergy
Creatures
Soaring Lightbringer
42%inclusion286 decks688 decks
37%synergy
Fear of Impostors
41%inclusion281 decks688 decks
39%synergy
Ghostly Dancers
38%inclusion261 decks688 decks
35%synergy
Aminatou, Veil Piercer
37%inclusion252 decks688 decks
35%synergy
Athreos, Shroud-Veiled
31%inclusion212 decks688 decks
26%synergy
Archetype of Imagination
30%inclusion206 decks688 decks
25%synergy
Skullsnap Nuisance
26%inclusion179 decks688 decks
26%synergy
Archon of Sun's Grace
25%inclusion169 decks688 decks
20%synergy
Silent Hallcreeper
24%inclusion168 decks688 decks
20%synergy
Zur the Enchanter
24%inclusion168 decks688 decks
19%synergy
Fear of Infinity
24%inclusion167 decks688 decks
24%synergy
Grim Guardian
23%inclusion157 decks688 decks
20%synergy
Ancient Cellarspawn
23%inclusion155 decks688 decks
19%synergy
Sage of Mysteries
22%inclusion154 decks688 decks
22%synergy
Overlord of the Floodpits
21%inclusion145 decks688 decks
17%synergy
Heliod, the Radiant Dawn
21%inclusion145 decks688 decks
17%synergy
Balemurk Leech
21%inclusion144 decks688 decks
20%synergy
Mindwrack Harpy
21%inclusion142 decks688 decks
20%synergy
Nightmare Shepherd
20%inclusion139 decks688 decks
18%synergy
Auramancer
20%inclusion137 decks688 decks
17%synergy
Solemn Simulacrum
19%inclusion132 decks688 decks
5%synergy
Gremlin Tamer
19%inclusion132 decks688 decks
18%synergy
Alseid of Life's Bounty
17%inclusion116 decks688 decks
15%synergy
Fear of Surveillance
16%inclusion110 decks688 decks
16%synergy
Spirited Companion
15%inclusion106 decks688 decks
13%synergy
Zur, Eternal Schemer
14%inclusion97 decks688 decks
11%synergy
Nashi, Searcher in the Dark
14%inclusion95 decks688 decks
13%synergy
Enduring Curiosity
14%inclusion94 decks688 decks
6%synergy
Metamorphosis Fanatic
13%inclusion90 decks688 decks
8%synergy
Starnheim Courser
13%inclusion89 decks688 decks
9%synergy
Arvinox, the Mind Flail
11%inclusion79 decks688 decks
10%synergy
Appendage Amalgam
11%inclusion77 decks688 decks
11%synergy
Fear of the Dark
11%inclusion74 decks688 decks
10%synergy
Creeping Peeper
10%inclusion72 decks688 decks
10%synergy
Burnished Hart
10%inclusion70 decks688 decks
7%synergy
Phenomenon Investigators
10%inclusion67 decks688 decks
9%synergy
Optimistic Scavenger
9.2%inclusion63 decks688 decks
9%synergy
Ghostly Keybearer
9.2%inclusion63 decks688 decks
9%synergy
Fear of Lost Teeth
8.9%inclusion61 decks688 decks
9%synergy
Millikin
8.7%inclusion60 decks688 decks
8%synergy
Verge Rangers
8.6%inclusion59 decks688 decks
7%synergy
Fear of Isolation
8.4%inclusion58 decks688 decks
8%synergy
Fear of Failed Tests
8.1%inclusion56 decks688 decks
8%synergy
Fear of Immobility
8.0%inclusion55 decks688 decks
8%synergy
Dream Eater
7.8%inclusion54 decks688 decks
7%synergy
Stitcher's Supplier
6.5%inclusion45 decks688 decks
6%synergy
Stenn, Paranoid Partisan
6.4%inclusion44 decks688 decks
5%synergy
Underworld Coinsmith
6.1%inclusion42 decks688 decks
5%synergy
Fear of Falling
5.8%inclusion40 decks688 decks
6%synergy
Sun Titan
5.8%inclusion40 decks688 decks
-3%synergy
Instants
Thirst for Meaning
39%inclusion269 decks688 decks
38%synergy
Otherworldly Gaze
32%inclusion219 decks688 decks
30%synergy
Arcane Denial
31%inclusion210 decks688 decks
10%synergy
Path to Exile
24%inclusion165 decks688 decks
-18%synergy
Counterspell
22%inclusion148 decks688 decks
-20%synergy
Negate
20%inclusion137 decks688 decks
3%synergy
Inkshield
19%inclusion133 decks688 decks
10%synergy
Utter End
19%inclusion131 decks688 decks
12%synergy
Void Rend
19%inclusion131 decks688 decks
-15%synergy
Frantic Search
17%inclusion116 decks688 decks
-1%synergy
Brainstorm
17%inclusion115 decks688 decks
0%synergy
Return to Dust
14%inclusion93 decks688 decks
10%synergy
Telling Time
10%inclusion68 decks688 decks
8%synergy
Fact or Fiction
10%inclusion67 decks688 decks
6%synergy
An Offer You Can't Refuse
8.0%inclusion55 decks688 decks
-19%synergy
Don't Make a Sound
7.4%inclusion51 decks687 decks
7%synergy
Glimmerburst
7.0%inclusion48 decks687 decks
6%synergy
Get Out
6.4%inclusion44 decks688 decks
6%synergy
Generous Gift
6.4%inclusion44 decks688 decks
-8%synergy
Dark Ritual
6.0%inclusion41 decks688 decks
-13%synergy
Dovin's Veto
5.4%inclusion37 decks688 decks
-20%synergy
Sorceries
Time Wipe
32%inclusion221 decks688 decks
25%synergy
Sevinne's Reclamation
29%inclusion198 decks688 decks
20%synergy
Extinguish All Hope
26%inclusion180 decks688 decks
25%synergy
Dance of the Manse
22%inclusion150 decks688 decks
18%synergy
Singularity Rupture
19%inclusion58 decks302 decks
17%synergy
Ponder
15%inclusion106 decks688 decks
6%synergy
Terminus
15%inclusion104 decks688 decks
11%synergy
Read the Bones
13%inclusion90 decks688 decks
9%synergy
Resurgent Belief
12%inclusion85 decks688 decks
10%synergy
Diabolic Vision
10%inclusion69 decks688 decks
8%synergy
Portent
10%inclusion67 decks688 decks
6%synergy
Aminatou's Augury
9.2%inclusion63 decks688 decks
8%synergy
Space-Time Anomaly
8.9%inclusion26 decks291 decks
7%synergy
Final Vengeance
7.1%inclusion49 decks688 decks
7%synergy
Demonic Counsel
7.0%inclusion48 decks688 decks
6%synergy
Open the Vaults
6.8%inclusion47 decks688 decks
5%synergy
Austere Command
6.7%inclusion46 decks688 decks
-2%synergy
Entreat the Angels
6.4%inclusion44 decks688 decks
4%synergy
Supreme Verdict
5.7%inclusion39 decks688 decks
-9%synergy
Windfall
5.7%inclusion39 decks688 decks
-8%synergy
Glimpse the Unthinkable
5.5%inclusion38 decks688 decks
5%synergy
Damn
5.2%inclusion36 decks688 decks
-15%synergy
Brilliant Restoration
5.1%inclusion35 decks688 decks
3%synergy
Utility Artifacts
Keys to the House
15%inclusion101 decks687 decks
14%synergy
Cloud Key
10%inclusion71 decks688 decks
7%synergy
Wayfarer's Bauble
10%inclusion70 decks688 decks
2%synergy
Swiftfoot Boots
9.0%inclusion62 decks688 decks
-15%synergy
Perpetual Timepiece
5.8%inclusion40 decks688 decks
5%synergy
Brainstone
5.5%inclusion38 decks688 decks
4%synergy
Enchantments
Cemetery Tampering
38%inclusion258 decks688 decks
37%synergy
Seal of Cleansing
37%inclusion257 decks688 decks
36%synergy
Timely Ward
36%inclusion248 decks688 decks
31%synergy
Ethereal Armor
35%inclusion243 decks688 decks
31%synergy
Extravagant Replication
35%inclusion241 decks688 decks
30%synergy
Cramped Vents // Access Maze
34%inclusion235 decks688 decks
32%synergy
Shark Typhoon
33%inclusion230 decks688 decks
28%synergy
Monologue Tax
33%inclusion225 decks688 decks
26%synergy
The Eldest Reborn
31%inclusion214 decks688 decks
29%synergy
All That Glitters
31%inclusion213 decks688 decks
22%synergy
Restricted Office // Lecture Hall
29%inclusion202 decks688 decks
27%synergy
Dress Down
29%inclusion201 decks688 decks
27%synergy
Grasp of Fate
29%inclusion199 decks688 decks
23%synergy
Propaganda
28%inclusion191 decks688 decks
1%synergy
Ripples of Undeath
26%inclusion176 decks688 decks
23%synergy
Central Elevator // Promising Stairs
25%inclusion174 decks688 decks
25%synergy
One with the Multiverse
24%inclusion166 decks688 decks
19%synergy
Cacophony Unleashed
24%inclusion164 decks688 decks
22%synergy
Meat Locker // Drowned Diner
23%inclusion159 decks687 decks
23%synergy
Derelict Attic // Widow's Walk
23%inclusion159 decks687 decks
23%synergy
The Tale of Tamiyo
23%inclusion158 decks688 decks
23%synergy
Estrid's Invocation
21%inclusion146 decks688 decks
17%synergy
Imprisoned in the Moon
21%inclusion145 decks688 decks
14%synergy
Dazzling Theater // Prop Room
21%inclusion143 decks687 decks
19%synergy
Seal of Removal
21%inclusion142 decks688 decks
20%synergy
Stillness in Motion
20%inclusion90 decks440 decks
20%synergy
Cast Out
20%inclusion138 decks688 decks
17%synergy
Polluted Cistern // Dim Oubliette
19%inclusion131 decks688 decks
18%synergy
Surgical Suite // Hospital Room
19%inclusion129 decks688 decks
18%synergy
Underwater Tunnel // Slimy Aquarium
19%inclusion128 decks687 decks
18%synergy
Mirror Room // Fractured Realm
17%inclusion119 decks688 decks
15%synergy
Secrets of the Dead
17%inclusion119 decks688 decks
17%synergy
Unable to Scream
17%inclusion118 decks688 decks
16%synergy
Spirit-Sister's Call
17%inclusion114 decks688 decks
15%synergy
Copy Enchantment
16%inclusion107 decks688 decks
11%synergy
Amphibian Downpour
15%inclusion105 decks688 decks
11%synergy
Darksteel Mutation
15%inclusion100 decks688 decks
8%synergy
Ghostly Prison
14%inclusion99 decks688 decks
-8%synergy
Seal of Doom
14%inclusion95 decks688 decks
14%synergy
Phyrexian Arena
14%inclusion94 decks688 decks
0%synergy
Funeral Room // Awakening Hall
14%inclusion93 decks688 decks
13%synergy
Animate Dead
13%inclusion92 decks688 decks
4%synergy
Unholy Annex // Ritual Chamber
13%inclusion89 decks688 decks
12%synergy
Sheltered by Ghosts
13%inclusion86 decks688 decks
10%synergy
Life Insurance
12%inclusion85 decks688 decks
11%synergy
Trapped in the Screen
12%inclusion83 decks688 decks
12%synergy
Nowhere to Run
12%inclusion82 decks688 decks
11%synergy
Soul Snare
11%inclusion76 decks688 decks
11%synergy
Witness Protection
9.2%inclusion63 decks688 decks
7%synergy
Grand Entryway // Elegant Rotunda
9.2%inclusion63 decks688 decks
9%synergy
Battles
Invasion of Theros
10%inclusion71 decks688 decks
9%synergy
Utility Lands
Bojuka Bog
42%inclusion288 decks688 decks
15%synergy
Hall of Heliod's Generosity
41%inclusion282 decks688 decks
28%synergy
Halimar Depths
25%inclusion170 decks688 decks
20%synergy
Reliquary Tower
9.3%inclusion64 decks688 decks
-25%synergy
Cephalid Coliseum
7.0%inclusion48 decks688 decks
3%synergy
Rogue's Passage
6.1%inclusion42 decks688 decks
-3%synergy
Mana Artifacts
Arcane Signet
82%inclusion561 decks688 decks
-6%synergy
Sol Ring
80%inclusion552 decks688 decks
-10%synergy
Azorius Signet
60%inclusion410 decks688 decks
28%synergy
Orzhov Signet
58%inclusion397 decks688 decks
24%synergy
Mind Stone
37%inclusion252 decks688 decks
24%synergy
Dimir Signet
36%inclusion246 decks688 decks
4%synergy
Commander's Sphere
35%inclusion243 decks688 decks
17%synergy
Talisman of Dominance
27%inclusion189 decks688 decks
-22%synergy
Talisman of Progress
27%inclusion185 decks688 decks
-16%synergy
Talisman of Hierarchy
21%inclusion147 decks688 decks
-22%synergy
Fellwar Stone
17%inclusion117 decks688 decks
-17%synergy
Lands
Island
99%inclusion682 decks688 decks
6%synergy
Swamp
99%inclusion679 decks688 decks
7%synergy
Plains
98%inclusion676 decks688 decks
7%synergy
Command Tower
89%inclusion609 decks688 decks
-4%synergy
Arcane Sanctum
79%inclusion541 decks688 decks
24%synergy
Evolving Wilds
56%inclusion385 decks688 decks
31%synergy
Caves of Koilos
56%inclusion382 decks688 decks
20%synergy
Temple of Enlightenment
55%inclusion375 decks688 decks
38%synergy
Terramorphic Expanse
54%inclusion372 decks688 decks
38%synergy
Temple of Silence
53%inclusion365 decks688 decks
34%synergy
Adarkar Wastes
51%inclusion353 decks688 decks
20%synergy
Temple of Deceit
51%inclusion348 decks688 decks
33%synergy
Obscura Storefront
47%inclusion322 decks688 decks
37%synergy
Dimir Aqueduct
44%inclusion305 decks688 decks
31%synergy
Azorius Chancery
44%inclusion302 decks688 decks
30%synergy
Exotic Orchard
43%inclusion299 decks688 decks
-15%synergy
Orzhov Basilica
43%inclusion296 decks688 decks
27%synergy
Underground River
42%inclusion289 decks688 decks
9%synergy
Tainted Field
41%inclusion281 decks688 decks
34%synergy
Tainted Isle
40%inclusion277 decks688 decks
34%synergy
Prairie Stream
39%inclusion267 decks688 decks
-2%synergy
Sunken Hollow
34%inclusion234 decks688 decks
-6%synergy
Glacial Fortress
31%inclusion212 decks688 decks
-10%synergy
Ash Barrens
31%inclusion212 decks688 decks
20%synergy
Contaminated Landscape
28%inclusion194 decks688 decks
14%synergy
Isolated Chapel
28%inclusion192 decks688 decks
-12%synergy
Thriving Isle
24%inclusion162 decks688 decks
19%synergy
Thriving Heath
23%inclusion160 decks688 decks
19%synergy
Thriving Moor
22%inclusion154 decks688 decks
18%synergy
Valgavoth's Lair
20%inclusion137 decks688 decks
17%synergy
Drowned Catacomb
18%inclusion122 decks688 decks
-19%synergy
Darkwater Catacombs
16%inclusion113 decks688 decks
2%synergy
Skycloud Expanse
16%inclusion112 decks688 decks
1%synergy
Choked Estuary
15%inclusion105 decks688 decks
-1%synergy
Port Town
15%inclusion102 decks688 decks
-2%synergy
Path of Ancestry
15%inclusion100 decks688 decks
-13%synergy
Myriad Landscape
12%inclusion84 decks688 decks
4%synergy
Shineshadow Snarl
12%inclusion84 decks688 decks
2%synergy
Irrigated Farmland
8.4%inclusion58 decks688 decks
1%synergy
Tranquil Cove
7.3%inclusion50 decks688 decks
1%synergy
Glasswing Grace
7.1%inclusion49 decks688 decks
4%synergy
Scoured Barrens
7.0%inclusion48 decks688 decks
1%synergy
Fetid Pools
6.8%inclusion47 decks688 decks
0%synergy
Abandoned Campground
6.7%inclusion46 decks688 decks
6%synergy
Desolate Mire
6.7%inclusion46 decks688 decks
0%synergy
Neglected Manor
6.3%inclusion43 decks688 decks
6%synergy
Fetid Heath
5.8%inclusion40 decks688 decks
-6%synergy
Murky Sewer
5.5%inclusion38 decks688 decks
5%synergy
Dismal Backwater
5.2%inclusion36 decks688 decks
-1%synergy
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