The Master of Keys (Commander) - Budget

The Master of Keys
Rank #314
661decks
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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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Sorceries
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Enchantments
Battles
Utility Lands
Mana Artifacts
Lands
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Swampsnare Trap
3.6%inclusion4 decks112 decks
3%synergy
The Legend of Kuruk
3.1%inclusion4 decks129 decks
3%synergy
Airbender's Reversal
1.8%inclusion2 decks113 decks
2%synergy
Misty Palms Oasis
1.7%inclusion2 decks117 decks
1%synergy
The Spirit Oasis
1.7%inclusion2 decks119 decks
2%synergy
High Synergy Cards
Inquisitive Glimmer
72%inclusion473 decks661 decks
64%synergy
Mesa Enchantress
72%inclusion479 decks661 decks
63%synergy
Starfield Mystic
69%inclusion456 decks661 decks
62%synergy
Demon of Fate's Design
63%inclusion416 decks661 decks
57%synergy
Doomwake Giant
62%inclusion413 decks661 decks
57%synergy
Fear of Sleep Paralysis
59%inclusion388 decks661 decks
53%synergy
Sigil of the Empty Throne
57%inclusion379 decks661 decks
51%synergy
Scrabbling Skullcrab
50%inclusion331 decks661 decks
49%synergy
Gravebreaker Lamia
49%inclusion322 decks661 decks
48%synergy
Entity Tracker
53%inclusion349 decks661 decks
46%synergy
Top Cards
Secret Arcade // Dusty Parlor
51%inclusion338 decks661 decks
46%synergy
Mirrormade
49%inclusion326 decks661 decks
40%synergy
Redress Fate
49%inclusion325 decks661 decks
43%synergy
Swords to Plowshares
48%inclusion319 decks661 decks
-20%synergy
Sphere of Safety
48%inclusion317 decks661 decks
39%synergy
Victor, Valgavoth's Seneschal
48%inclusion315 decks661 decks
46%synergy
Ondu Spiritdancer
44%inclusion293 decks661 decks
38%synergy
Moon-Blessed Cleric
44%inclusion288 decks661 decks
39%synergy
Bottomless Pool // Locker Room
42%inclusion275 decks661 decks
40%synergy
Soaring Lightbringer
41%inclusion274 decks661 decks
36%synergy
Creatures
Fear of Impostors
41%inclusion270 decks661 decks
39%synergy
Ghostly Dancers
38%inclusion249 decks661 decks
35%synergy
Aminatou, Veil Piercer
36%inclusion240 decks661 decks
35%synergy
Athreos, Shroud-Veiled
31%inclusion204 decks661 decks
26%synergy
Archetype of Imagination
30%inclusion200 decks661 decks
26%synergy
Skullsnap Nuisance
26%inclusion175 decks661 decks
26%synergy
Archon of Sun's Grace
25%inclusion164 decks661 decks
20%synergy
Zur the Enchanter
25%inclusion164 decks661 decks
20%synergy
Fear of Infinity
24%inclusion156 decks661 decks
23%synergy
Silent Hallcreeper
24%inclusion156 decks661 decks
19%synergy
Grim Guardian
23%inclusion154 decks661 decks
21%synergy
Sage of Mysteries
22%inclusion147 decks661 decks
22%synergy
Ancient Cellarspawn
22%inclusion145 decks661 decks
19%synergy
Balemurk Leech
22%inclusion143 decks661 decks
21%synergy
Overlord of the Floodpits
21%inclusion141 decks661 decks
18%synergy
Heliod, the Radiant Dawn
21%inclusion141 decks661 decks
18%synergy
Mindwrack Harpy
21%inclusion139 decks661 decks
21%synergy
Auramancer
20%inclusion135 decks661 decks
17%synergy
Nightmare Shepherd
20%inclusion133 decks661 decks
18%synergy
Gremlin Tamer
20%inclusion131 decks661 decks
19%synergy
Solemn Simulacrum
19%inclusion125 decks661 decks
4%synergy
Alseid of Life's Bounty
17%inclusion114 decks661 decks
16%synergy
Fear of Surveillance
16%inclusion103 decks661 decks
15%synergy
Spirited Companion
16%inclusion103 decks661 decks
14%synergy
Enduring Curiosity
14%inclusion92 decks661 decks
6%synergy
Nashi, Searcher in the Dark
14%inclusion92 decks661 decks
13%synergy
Zur, Eternal Schemer
14%inclusion91 decks661 decks
11%synergy
Starnheim Courser
14%inclusion90 decks661 decks
10%synergy
Metamorphosis Fanatic
13%inclusion88 decks661 decks
9%synergy
Appendage Amalgam
11%inclusion74 decks661 decks
11%synergy
Arvinox, the Mind Flail
11%inclusion72 decks661 decks
9%synergy
Fear of the Dark
11%inclusion70 decks661 decks
10%synergy
Creeping Peeper
10%inclusion69 decks661 decks
10%synergy
Burnished Hart
10%inclusion65 decks661 decks
6%synergy
Millikin
10%inclusion63 decks661 decks
9%synergy
Phenomenon Investigators
9.4%inclusion62 decks661 decks
9%synergy
Ghostly Keybearer
9.2%inclusion61 decks661 decks
9%synergy
Optimistic Scavenger
9.1%inclusion60 decks661 decks
9%synergy
Fear of Lost Teeth
9.1%inclusion60 decks661 decks
9%synergy
Verge Rangers
8.3%inclusion55 decks661 decks
7%synergy
Fear of Isolation
8.2%inclusion54 decks661 decks
8%synergy
Fear of Failed Tests
8.2%inclusion54 decks661 decks
8%synergy
Dream Eater
8.2%inclusion54 decks661 decks
8%synergy
Fear of Immobility
8.0%inclusion53 decks661 decks
8%synergy
Stenn, Paranoid Partisan
6.7%inclusion44 decks661 decks
5%synergy
Stitcher's Supplier
6.5%inclusion43 decks661 decks
6%synergy
Underworld Coinsmith
6.2%inclusion41 decks661 decks
5%synergy
Emet-Selch of the Third Seat
5.9%inclusion20 decks340 decks
-4%synergy
Dreadwing Scavenger
5.8%inclusion34 decks582 decks
5%synergy
Ashiok's Reaper
5.7%inclusion38 decks661 decks
5%synergy
Instants
Thirst for Meaning
40%inclusion266 decks661 decks
39%synergy
Otherworldly Gaze
33%inclusion218 decks661 decks
31%synergy
Arcane Denial
31%inclusion207 decks661 decks
11%synergy
Path to Exile
24%inclusion159 decks661 decks
-18%synergy
Counterspell
22%inclusion143 decks661 decks
-20%synergy
Negate
20%inclusion133 decks661 decks
4%synergy
Inkshield
20%inclusion133 decks661 decks
11%synergy
Utter End
19%inclusion126 decks661 decks
12%synergy
Void Rend
18%inclusion121 decks661 decks
-15%synergy
Brainstorm
17%inclusion112 decks661 decks
0%synergy
Frantic Search
17%inclusion111 decks661 decks
0%synergy
Return to Dust
14%inclusion90 decks661 decks
10%synergy
Telling Time
10%inclusion67 decks661 decks
8%synergy
Fact or Fiction
10%inclusion66 decks661 decks
6%synergy
An Offer You Can't Refuse
8.2%inclusion54 decks661 decks
-19%synergy
Don't Make a Sound
7.7%inclusion51 decks659 decks
7%synergy
Glimmerburst
7.4%inclusion49 decks659 decks
7%synergy
Generous Gift
6.5%inclusion43 decks661 decks
-8%synergy
Get Out
6.4%inclusion42 decks661 decks
6%synergy
Dark Ritual
5.6%inclusion37 decks661 decks
-14%synergy
Dovin's Veto
5.3%inclusion35 decks661 decks
-20%synergy
Sorceries
Time Wipe
33%inclusion217 decks661 decks
26%synergy
Sevinne's Reclamation
29%inclusion192 decks661 decks
20%synergy
Extinguish All Hope
26%inclusion173 decks661 decks
25%synergy
Dance of the Manse
22%inclusion145 decks661 decks
18%synergy
Singularity Rupture
19%inclusion50 decks265 decks
16%synergy
Ponder
16%inclusion104 decks661 decks
7%synergy
Terminus
15%inclusion102 decks661 decks
11%synergy
Read the Bones
13%inclusion88 decks661 decks
9%synergy
Resurgent Belief
13%inclusion84 decks661 decks
11%synergy
Diabolic Vision
11%inclusion70 decks661 decks
8%synergy
Portent
10%inclusion66 decks661 decks
7%synergy
Aminatou's Augury
9.1%inclusion60 decks661 decks
8%synergy
Space-Time Anomaly
9.1%inclusion23 decks254 decks
7%synergy
Final Vengeance
7.3%inclusion48 decks661 decks
7%synergy
Austere Command
6.8%inclusion45 decks661 decks
-2%synergy
Demonic Counsel
6.8%inclusion45 decks661 decks
6%synergy
Open the Vaults
6.5%inclusion43 decks661 decks
5%synergy
Entreat the Angels
6.4%inclusion42 decks661 decks
4%synergy
Windfall
5.7%inclusion38 decks661 decks
-8%synergy
Supreme Verdict
5.6%inclusion37 decks661 decks
-9%synergy
Damn
5.4%inclusion36 decks661 decks
-15%synergy
Glimpse the Unthinkable
5.4%inclusion36 decks661 decks
5%synergy
Brilliant Restoration
5.1%inclusion34 decks661 decks
3%synergy
Utility Artifacts
Keys to the House
15%inclusion97 decks660 decks
14%synergy
Wayfarer's Bauble
11%inclusion72 decks661 decks
3%synergy
Cloud Key
10%inclusion66 decks661 decks
7%synergy
Swiftfoot Boots
10%inclusion64 decks661 decks
-14%synergy
Brainstone
5.6%inclusion37 decks661 decks
4%synergy
Perpetual Timepiece
5.4%inclusion36 decks661 decks
5%synergy
Enchantments
Defiled Crypt // Cadaver Lab
41%inclusion272 decks660 decks
40%synergy
Cemetery Tampering
39%inclusion255 decks661 decks
38%synergy
Timely Ward
37%inclusion246 decks661 decks
32%synergy
Seal of Cleansing
37%inclusion245 decks661 decks
36%synergy
Ethereal Armor
36%inclusion241 decks661 decks
32%synergy
Extravagant Replication
35%inclusion231 decks661 decks
30%synergy
Shark Typhoon
34%inclusion223 decks661 decks
28%synergy
Cramped Vents // Access Maze
34%inclusion222 decks661 decks
31%synergy
Monologue Tax
33%inclusion219 decks661 decks
27%synergy
All That Glitters
33%inclusion215 decks661 decks
24%synergy
The Eldest Reborn
30%inclusion201 decks661 decks
28%synergy
Grasp of Fate
30%inclusion198 decks661 decks
24%synergy
Dress Down
29%inclusion192 decks661 decks
27%synergy
Restricted Office // Lecture Hall
29%inclusion189 decks661 decks
26%synergy
Propaganda
27%inclusion180 decks661 decks
1%synergy
Ripples of Undeath
26%inclusion174 decks661 decks
24%synergy
Meat Locker // Drowned Diner
24%inclusion158 decks659 decks
23%synergy
Central Elevator // Promising Stairs
24%inclusion158 decks661 decks
23%synergy
One with the Multiverse
24%inclusion157 decks661 decks
19%synergy
The Tale of Tamiyo
24%inclusion157 decks661 decks
23%synergy
Cacophony Unleashed
24%inclusion156 decks661 decks
22%synergy
Derelict Attic // Widow's Walk
24%inclusion155 decks659 decks
23%synergy
Imprisoned in the Moon
21%inclusion142 decks661 decks
15%synergy
Estrid's Invocation
21%inclusion140 decks661 decks
17%synergy
Dazzling Theater // Prop Room
21%inclusion138 decks660 decks
19%synergy
Seal of Removal
20%inclusion135 decks661 decks
20%synergy
Stillness in Motion
20%inclusion80 decks403 decks
19%synergy
Cast Out
20%inclusion131 decks661 decks
17%synergy
Underwater Tunnel // Slimy Aquarium
19%inclusion128 decks660 decks
19%synergy
Polluted Cistern // Dim Oubliette
19%inclusion126 decks661 decks
18%synergy
Surgical Suite // Hospital Room
18%inclusion121 decks661 decks
18%synergy
Unable to Scream
17%inclusion115 decks661 decks
16%synergy
Secrets of the Dead
17%inclusion111 decks661 decks
16%synergy
Mirror Room // Fractured Realm
17%inclusion111 decks661 decks
14%synergy
Spirit-Sister's Call
16%inclusion109 decks661 decks
15%synergy
Darksteel Mutation
16%inclusion103 decks661 decks
9%synergy
Copy Enchantment
15%inclusion102 decks661 decks
11%synergy
Amphibian Downpour
15%inclusion102 decks661 decks
11%synergy
Ghostly Prison
15%inclusion100 decks661 decks
-7%synergy
Sheltered by Ghosts
14%inclusion92 decks661 decks
11%synergy
Phyrexian Arena
14%inclusion92 decks661 decks
0%synergy
Seal of Doom
14%inclusion91 decks661 decks
14%synergy
Animate Dead
14%inclusion91 decks661 decks
4%synergy
Funeral Room // Awakening Hall
14%inclusion90 decks661 decks
13%synergy
Unholy Annex // Ritual Chamber
13%inclusion86 decks661 decks
12%synergy
Life Insurance
13%inclusion83 decks661 decks
11%synergy
Trapped in the Screen
12%inclusion80 decks661 decks
12%synergy
Soul Snare
11%inclusion74 decks661 decks
11%synergy
Nowhere to Run
11%inclusion74 decks661 decks
10%synergy
Witness Protection
10%inclusion63 decks661 decks
8%synergy
Battles
Invasion of Theros
10%inclusion65 decks661 decks
8%synergy
Utility Lands
Bojuka Bog
42%inclusion279 decks661 decks
15%synergy
Hall of Heliod's Generosity
42%inclusion278 decks661 decks
29%synergy
Halimar Depths
25%inclusion167 decks661 decks
21%synergy
Reliquary Tower
10%inclusion63 decks661 decks
-24%synergy
Cephalid Coliseum
7.0%inclusion46 decks661 decks
3%synergy
Rogue's Passage
6.2%inclusion41 decks661 decks
-3%synergy
Mana Artifacts
Arcane Signet
81%inclusion537 decks661 decks
-7%synergy
Sol Ring
80%inclusion529 decks661 decks
-10%synergy
Azorius Signet
59%inclusion391 decks661 decks
27%synergy
Orzhov Signet
57%inclusion379 decks661 decks
23%synergy
Mind Stone
37%inclusion244 decks661 decks
24%synergy
Dimir Signet
36%inclusion235 decks661 decks
3%synergy
Commander's Sphere
35%inclusion232 decks661 decks
16%synergy
Talisman of Dominance
29%inclusion191 decks661 decks
-21%synergy
Talisman of Progress
26%inclusion173 decks661 decks
-17%synergy
Talisman of Hierarchy
22%inclusion147 decks661 decks
-21%synergy
Fellwar Stone
17%inclusion115 decks661 decks
-17%synergy
Lands
Island
99%inclusion655 decks661 decks
6%synergy
Swamp
99%inclusion652 decks661 decks
7%synergy
Plains
98%inclusion650 decks661 decks
7%synergy
Command Tower
89%inclusion587 decks661 decks
-4%synergy
Arcane Sanctum
78%inclusion518 decks661 decks
24%synergy
Evolving Wilds
57%inclusion377 decks661 decks
32%synergy
Caves of Koilos
57%inclusion375 decks661 decks
21%synergy
Terramorphic Expanse
56%inclusion368 decks661 decks
39%synergy
Temple of Enlightenment
55%inclusion365 decks661 decks
39%synergy
Temple of Silence
54%inclusion358 decks661 decks
35%synergy
Temple of Deceit
52%inclusion343 decks661 decks
34%synergy
Adarkar Wastes
52%inclusion342 decks661 decks
21%synergy
Obscura Storefront
48%inclusion318 decks661 decks
38%synergy
Dimir Aqueduct
45%inclusion299 decks661 decks
31%synergy
Azorius Chancery
45%inclusion297 decks661 decks
31%synergy
Orzhov Basilica
44%inclusion294 decks661 decks
29%synergy
Underground River
43%inclusion283 decks661 decks
10%synergy
Exotic Orchard
43%inclusion282 decks661 decks
-16%synergy
Tainted Field
42%inclusion277 decks661 decks
35%synergy
Tainted Isle
41%inclusion270 decks661 decks
34%synergy
Prairie Stream
38%inclusion254 decks661 decks
-2%synergy
Sunken Hollow
34%inclusion225 decks661 decks
-6%synergy
Ash Barrens
32%inclusion213 decks661 decks
21%synergy
Glacial Fortress
30%inclusion199 decks661 decks
-10%synergy
Contaminated Landscape
29%inclusion190 decks661 decks
14%synergy
Isolated Chapel
27%inclusion177 decks661 decks
-12%synergy
Thriving Isle
24%inclusion157 decks661 decks
19%synergy
Thriving Heath
23%inclusion154 decks661 decks
19%synergy
Thriving Moor
23%inclusion151 decks661 decks
18%synergy
Valgavoth's Lair
20%inclusion130 decks661 decks
17%synergy
Drowned Catacomb
17%inclusion114 decks661 decks
-19%synergy
Darkwater Catacombs
16%inclusion109 decks661 decks
2%synergy
Skycloud Expanse
16%inclusion109 decks661 decks
2%synergy
Port Town
15%inclusion98 decks661 decks
-2%synergy
Choked Estuary
14%inclusion95 decks661 decks
-2%synergy
Path of Ancestry
14%inclusion94 decks661 decks
-13%synergy
Shineshadow Snarl
13%inclusion83 decks661 decks
2%synergy
Myriad Landscape
12%inclusion79 decks661 decks
3%synergy
Irrigated Farmland
8.3%inclusion55 decks661 decks
1%synergy
Tranquil Cove
7.3%inclusion48 decks661 decks
1%synergy
Glasswing Grace
7.1%inclusion47 decks661 decks
4%synergy
Scoured Barrens
7.1%inclusion47 decks661 decks
1%synergy
Desolate Mire
7.0%inclusion46 decks661 decks
1%synergy
Abandoned Campground
6.7%inclusion44 decks661 decks
6%synergy
Fetid Pools
6.5%inclusion43 decks661 decks
0%synergy
Neglected Manor
6.2%inclusion41 decks661 decks
6%synergy
Murky Sewer
5.7%inclusion38 decks661 decks
5%synergy
Dismal Backwater
5.4%inclusion36 decks661 decks
-1%synergy
Fetid Heath
5.1%inclusion34 decks661 decks
-7%synergy
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