The Master of Keys (Commander) - Budget Optimized

The Master of Keys
Rank #305
27decks
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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
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Enchantments
Utility Lands
Mana Artifacts
Lands
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Secret Arcade // Dusty Parlor
78%inclusion21 decks27 decks
73%synergy
Mesa Enchantress
81%inclusion22 decks27 decks
73%synergy
Ondu Spiritdancer
78%inclusion21 decks27 decks
72%synergy
Starfield Mystic
70%inclusion19 decks27 decks
64%synergy
Inquisitive Glimmer
70%inclusion19 decks27 decks
63%synergy
Scrabbling Skullcrab
63%inclusion17 decks27 decks
62%synergy
Demon of Fate's Design
67%inclusion18 decks27 decks
61%synergy
Mirrormade
70%inclusion19 decks27 decks
61%synergy
Gravebreaker Lamia
59%inclusion16 decks27 decks
58%synergy
Fear of Impostors
59%inclusion16 decks27 decks
58%synergy
Top Cards
Swords to Plowshares
70%inclusion19 decks27 decks
2%synergy
Entity Tracker
59%inclusion16 decks27 decks
53%synergy
Sphere of Safety
56%inclusion15 decks27 decks
46%synergy
Fear of Sleep Paralysis
56%inclusion15 decks27 decks
50%synergy
Doomwake Giant
56%inclusion15 decks27 decks
50%synergy
Extravagant Replication
52%inclusion14 decks27 decks
47%synergy
Moon-Blessed Cleric
52%inclusion14 decks27 decks
47%synergy
Victor, Valgavoth's Seneschal
52%inclusion14 decks27 decks
50%synergy
Ghostly Dancers
52%inclusion14 decks27 decks
49%synergy
Sigil of the Empty Throne
52%inclusion14 decks27 decks
46%synergy
Game Changers
Gifts Ungiven
15%inclusion4 decks27 decks
12%synergy
Notion Thief
11%inclusion3 decks27 decks
4%synergy
Farewell
7.4%inclusion2 decks27 decks
-5%synergy
Creatures
Soaring Lightbringer
48%inclusion13 decks27 decks
43%synergy
Archetype of Imagination
44%inclusion12 decks27 decks
40%synergy
Overlord of the Floodpits
41%inclusion11 decks27 decks
37%synergy
Aminatou, Veil Piercer
37%inclusion10 decks27 decks
36%synergy
Gremlin Tamer
33%inclusion9 decks27 decks
32%synergy
Skullsnap Nuisance
30%inclusion8 decks27 decks
29%synergy
Grim Guardian
30%inclusion8 decks27 decks
27%synergy
Zur the Enchanter
30%inclusion8 decks27 decks
24%synergy
Solemn Simulacrum
26%inclusion7 decks27 decks
12%synergy
Overlord of the Balemurk
26%inclusion7 decks27 decks
24%synergy
Zur, Eternal Schemer
26%inclusion7 decks27 decks
23%synergy
Silent Hallcreeper
26%inclusion7 decks27 decks
21%synergy
Balemurk Leech
26%inclusion7 decks27 decks
25%synergy
Athreos, Shroud-Veiled
22%inclusion6 decks27 decks
18%synergy
Enduring Curiosity
22%inclusion6 decks27 decks
14%synergy
Nightmare Shepherd
22%inclusion6 decks27 decks
20%synergy
Auramancer
22%inclusion6 decks27 decks
19%synergy
Abdel Adrian, Gorion's Ward
22%inclusion6 decks27 decks
21%synergy
Mindwrack Harpy
19%inclusion5 decks27 decks
18%synergy
Archon of Sun's Grace
19%inclusion5 decks27 decks
14%synergy
Burnished Hart
19%inclusion5 decks27 decks
15%synergy
Ancient Cellarspawn
19%inclusion5 decks27 decks
15%synergy
Heliod, the Radiant Dawn
19%inclusion5 decks27 decks
15%synergy
Hedron Crab
19%inclusion5 decks27 decks
18%synergy
Phenomenon Investigators
19%inclusion5 decks27 decks
18%synergy
Optimistic Scavenger
15%inclusion4 decks27 decks
14%synergy
Sage of Mysteries
15%inclusion4 decks27 decks
15%synergy
Nashi, Searcher in the Dark
15%inclusion4 decks27 decks
14%synergy
Ghostly Pilferer
15%inclusion4 decks27 decks
7%synergy
Malevolent Hermit
15%inclusion4 decks27 decks
14%synergy
Leonin Relic-Warder
15%inclusion4 decks27 decks
15%synergy
Creeping Peeper
15%inclusion4 decks27 decks
15%synergy
Lurrus of the Dream-Den
11%inclusion3 decks27 decks
10%synergy
Hydroelectric Specimen
11%inclusion3 decks27 decks
8%synergy
Overlord of the Mistmoors
11%inclusion3 decks27 decks
9%synergy
Verge Rangers
11%inclusion3 decks27 decks
10%synergy
Fear of Isolation
11%inclusion3 decks27 decks
11%synergy
Laboratory Maniac
11%inclusion3 decks27 decks
8%synergy
Braids, Arisen Nightmare
11%inclusion3 decks27 decks
10%synergy
Fear of Infinity
11%inclusion3 decks27 decks
11%synergy
Protean Thaumaturge
11%inclusion3 decks27 decks
11%synergy
Emet-Selch of the Third Seat
10%inclusion2 decks21 decks
0%synergy
Lotho, Corrupt Shirriff
7.4%inclusion2 decks27 decks
-9%synergy
Arvinox, the Mind Flail
7.4%inclusion2 decks27 decks
6%synergy
Phantasmal Image
7.4%inclusion2 decks27 decks
5%synergy
Ledger Shredder
7.4%inclusion2 decks27 decks
-1%synergy
Ghostly Keybearer
7.4%inclusion2 decks27 decks
7%synergy
Starnheim Courser
7.4%inclusion2 decks27 decks
4%synergy
Metamorphosis Fanatic
7.4%inclusion2 decks27 decks
3%synergy
Spirit of the Labyrinth
7.4%inclusion2 decks27 decks
7%synergy
Instants
Arcane Denial
44%inclusion12 decks27 decks
24%synergy
Thirst for Meaning
37%inclusion10 decks27 decks
36%synergy
Counterspell
37%inclusion10 decks27 decks
-5%synergy
Inkshield
37%inclusion10 decks27 decks
28%synergy
Otherworldly Gaze
37%inclusion10 decks27 decks
35%synergy
Utter End
30%inclusion8 decks27 decks
23%synergy
Brainstorm
22%inclusion6 decks27 decks
5%synergy
Path to Exile
22%inclusion6 decks27 decks
-20%synergy
Frantic Search
19%inclusion5 decks27 decks
1%synergy
Dovin's Veto
15%inclusion4 decks27 decks
-11%synergy
An Offer You Can't Refuse
15%inclusion4 decks27 decks
-12%synergy
Return to Dust
15%inclusion4 decks27 decks
11%synergy
Delay
15%inclusion4 decks27 decks
13%synergy
Telling Time
11%inclusion3 decks27 decks
9%synergy
Negate
11%inclusion3 decks27 decks
-5%synergy
Darkblast
11%inclusion3 decks27 decks
11%synergy
Opt
11%inclusion3 decks27 decks
7%synergy
Get Out
11%inclusion3 decks27 decks
11%synergy
No More Lies
11%inclusion3 decks27 decks
10%synergy
Muddle the Mixture
11%inclusion3 decks27 decks
7%synergy
Lim-Dûl's Vault
11%inclusion3 decks27 decks
8%synergy
Dark Ritual
11%inclusion3 decks27 decks
-8%synergy
Mana Leak
11%inclusion3 decks27 decks
9%synergy
Shred Memory
11%inclusion3 decks27 decks
11%synergy
Waterlogged Teachings
7.4%inclusion2 decks27 decks
3%synergy
Fact or Fiction
7.4%inclusion2 decks27 decks
4%synergy
Unwanted Remake
7.4%inclusion2 decks27 decks
7%synergy
Soul Partition
7.4%inclusion2 decks27 decks
7%synergy
Dispel
7.4%inclusion2 decks27 decks
4%synergy
Spell Pierce
7.4%inclusion2 decks27 decks
5%synergy
Long River's Pull
7.4%inclusion2 decks27 decks
7%synergy
Sorceries
Redress Fate
41%inclusion11 decks27 decks
35%synergy
Sevinne's Reclamation
37%inclusion10 decks27 decks
28%synergy
Time Wipe
26%inclusion7 decks27 decks
19%synergy
Extinguish All Hope
26%inclusion7 decks27 decks
24%synergy
Lively Dirge
22%inclusion6 decks27 decks
21%synergy
Terminus
19%inclusion5 decks27 decks
15%synergy
Read the Bones
15%inclusion4 decks27 decks
11%synergy
Demonic Counsel
15%inclusion4 decks27 decks
14%synergy
Unmarked Grave
15%inclusion4 decks27 decks
13%synergy
Singularity Rupture
12%inclusion2 decks17 decks
9%synergy
Buried Alive
11%inclusion3 decks27 decks
7%synergy
Dance of the Manse
11%inclusion3 decks27 decks
8%synergy
Diabolic Vision
11%inclusion3 decks27 decks
9%synergy
Entreat the Angels
11%inclusion3 decks27 decks
9%synergy
Portent
11%inclusion3 decks27 decks
8%synergy
Ponder
11%inclusion3 decks27 decks
2%synergy
Windfall
11%inclusion3 decks27 decks
-2%synergy
Damn
11%inclusion3 decks27 decks
-9%synergy
Commune with Evil
7.4%inclusion2 decks27 decks
7%synergy
Glimpse the Unthinkable
7.4%inclusion2 decks27 decks
7%synergy
Ringsight
7.4%inclusion2 decks27 decks
6%synergy
Whispering Madness
7.4%inclusion2 decks27 decks
6%synergy
Aminatou's Augury
7.4%inclusion2 decks27 decks
6%synergy
Resurgent Belief
7.4%inclusion2 decks27 decks
5%synergy
Unearth
7.4%inclusion2 decks27 decks
6%synergy
Traumatize
7.4%inclusion2 decks27 decks
7%synergy
Final Parting
7.4%inclusion2 decks27 decks
7%synergy
Utility Artifacts
Keys to the House
22%inclusion6 decks27 decks
22%synergy
Wishclaw Talisman
15%inclusion4 decks27 decks
7%synergy
Cloud Key
11%inclusion3 decks27 decks
8%synergy
Soul-Guide Lantern
7.4%inclusion2 decks27 decks
6%synergy
The Everflowing Well
7.4%inclusion2 decks27 decks
7%synergy
Wayfarer's Bauble
7.4%inclusion2 decks27 decks
0%synergy
Enchantments
Timely Ward
48%inclusion13 decks27 decks
43%synergy
Bottomless Pool // Locker Room
48%inclusion13 decks27 decks
46%synergy
Ripples of Undeath
44%inclusion12 decks27 decks
42%synergy
Shark Typhoon
41%inclusion11 decks27 decks
35%synergy
Monologue Tax
41%inclusion11 decks27 decks
34%synergy
Dress Down
41%inclusion11 decks27 decks
38%synergy
Defiled Crypt // Cadaver Lab
37%inclusion10 decks27 decks
36%synergy
Animate Dead
37%inclusion10 decks27 decks
27%synergy
Cramped Vents // Access Maze
33%inclusion9 decks27 decks
31%synergy
Seal of Cleansing
33%inclusion9 decks27 decks
32%synergy
Cemetery Tampering
30%inclusion8 decks27 decks
29%synergy
The Eldest Reborn
30%inclusion8 decks27 decks
27%synergy
Central Elevator // Promising Stairs
30%inclusion8 decks27 decks
29%synergy
Ethereal Armor
30%inclusion8 decks27 decks
25%synergy
Mirror Room // Fractured Realm
30%inclusion8 decks27 decks
27%synergy
One with the Multiverse
26%inclusion7 decks27 decks
21%synergy
Unable to Scream
26%inclusion7 decks27 decks
25%synergy
Restricted Office // Lecture Hall
26%inclusion7 decks27 decks
24%synergy
Cast Out
26%inclusion7 decks27 decks
23%synergy
Grasp of Fate
26%inclusion7 decks27 decks
20%synergy
Meat Locker // Drowned Diner
26%inclusion7 decks27 decks
25%synergy
Sheltered by Ghosts
22%inclusion6 decks27 decks
20%synergy
Seal of Removal
22%inclusion6 decks27 decks
22%synergy
Polluted Cistern // Dim Oubliette
22%inclusion6 decks27 decks
22%synergy
Amphibian Downpour
22%inclusion6 decks27 decks
18%synergy
Propaganda
22%inclusion6 decks27 decks
-5%synergy
Estrid's Invocation
19%inclusion5 decks27 decks
14%synergy
Secrets of the Dead
19%inclusion5 decks27 decks
18%synergy
Surgical Suite // Hospital Room
19%inclusion5 decks27 decks
18%synergy
Dazzling Theater // Prop Room
19%inclusion5 decks27 decks
17%synergy
Nowhere to Run
19%inclusion5 decks27 decks
17%synergy
Founding the Third Path
19%inclusion5 decks27 decks
18%synergy
Cacophony Unleashed
19%inclusion5 decks27 decks
17%synergy
Touch the Spirit Realm
19%inclusion5 decks27 decks
16%synergy
Necromancy
19%inclusion5 decks27 decks
14%synergy
Derelict Attic // Widow's Walk
19%inclusion5 decks27 decks
18%synergy
Witness Protection
19%inclusion5 decks27 decks
17%synergy
Blind Obedience
15%inclusion4 decks27 decks
3%synergy
Mystic Remora
15%inclusion4 decks27 decks
-6%synergy
All That Glitters
15%inclusion4 decks27 decks
6%synergy
Static Prison
15%inclusion4 decks27 decks
14%synergy
Tinybones Joins Up
15%inclusion4 decks27 decks
14%synergy
Hallowed Haunting
15%inclusion4 decks27 decks
12%synergy
Funeral Room // Awakening Hall
15%inclusion4 decks27 decks
14%synergy
Aura of Silence
15%inclusion4 decks27 decks
12%synergy
Stillness in Motion
14%inclusion3 decks22 decks
13%synergy
Trapped in the Screen
11%inclusion3 decks27 decks
11%synergy
Spirit-Sister's Call
11%inclusion3 decks27 decks
10%synergy
The Tale of Tamiyo
11%inclusion3 decks27 decks
11%synergy
Curator's Ward
11%inclusion3 decks27 decks
8%synergy
Utility Lands
Hall of Heliod's Generosity
56%inclusion15 decks27 decks
42%synergy
Bojuka Bog
52%inclusion14 decks27 decks
25%synergy
Halimar Depths
33%inclusion9 decks27 decks
29%synergy
Cephalid Coliseum
15%inclusion4 decks27 decks
11%synergy
Reliquary Tower
7.4%inclusion2 decks27 decks
-26%synergy
Nephalia Drownyard
7.4%inclusion2 decks27 decks
7%synergy
Mana Artifacts
Arcane Signet
85%inclusion23 decks27 decks
-3%synergy
Sol Ring
85%inclusion23 decks27 decks
-5%synergy
Azorius Signet
70%inclusion19 decks27 decks
39%synergy
Orzhov Signet
63%inclusion17 decks27 decks
30%synergy
Mind Stone
37%inclusion10 decks27 decks
25%synergy
Commander's Sphere
33%inclusion9 decks27 decks
15%synergy
Dimir Signet
30%inclusion8 decks27 decks
-2%synergy
Fellwar Stone
26%inclusion7 decks27 decks
-7%synergy
Talisman of Hierarchy
26%inclusion7 decks27 decks
-18%synergy
Talisman of Progress
26%inclusion7 decks27 decks
-18%synergy
Talisman of Dominance
22%inclusion6 decks27 decks
-27%synergy
Bender's Waterskin
5.9%inclusion1 decks17 decks
1%synergy
Lands
Swamp
100%inclusion27 decks27 decks
8%synergy
Plains
100%inclusion27 decks27 decks
8%synergy
Island
96%inclusion26 decks27 decks
3%synergy
Command Tower
85%inclusion23 decks27 decks
-7%synergy
Caves of Koilos
78%inclusion21 decks27 decks
42%synergy
Underground River
78%inclusion21 decks27 decks
44%synergy
Adarkar Wastes
78%inclusion21 decks27 decks
46%synergy
Terramorphic Expanse
67%inclusion18 decks27 decks
50%synergy
Temple of Silence
67%inclusion18 decks27 decks
48%synergy
Arcane Sanctum
67%inclusion18 decks27 decks
12%synergy
Orzhov Basilica
67%inclusion18 decks27 decks
51%synergy
Temple of Deceit
63%inclusion17 decks27 decks
45%synergy
Azorius Chancery
63%inclusion17 decks27 decks
49%synergy
Evolving Wilds
63%inclusion17 decks27 decks
38%synergy
Obscura Storefront
63%inclusion17 decks27 decks
53%synergy
Temple of Enlightenment
59%inclusion16 decks27 decks
43%synergy
Tainted Field
59%inclusion16 decks27 decks
52%synergy
Tainted Isle
56%inclusion15 decks27 decks
49%synergy
Dimir Aqueduct
56%inclusion15 decks27 decks
42%synergy
Ash Barrens
48%inclusion13 decks27 decks
37%synergy
Exotic Orchard
33%inclusion9 decks27 decks
-25%synergy
Thriving Moor
33%inclusion9 decks27 decks
29%synergy
Thriving Isle
33%inclusion9 decks27 decks
29%synergy
Thriving Heath
33%inclusion9 decks27 decks
29%synergy
Glacial Fortress
30%inclusion8 decks27 decks
-12%synergy
Isolated Chapel
26%inclusion7 decks27 decks
-14%synergy
Sunken Hollow
26%inclusion7 decks27 decks
-14%synergy
Prairie Stream
22%inclusion6 decks27 decks
-18%synergy
Skycloud Expanse
22%inclusion6 decks27 decks
7%synergy
River of Tears
19%inclusion5 decks27 decks
16%synergy
Contaminated Landscape
19%inclusion5 decks27 decks
4%synergy
Darkwater Catacombs
19%inclusion5 decks27 decks
4%synergy
Drowned Catacomb
15%inclusion4 decks27 decks
-22%synergy
Hydroelectric Specimen
11%inclusion3 decks27 decks
8%synergy
Abandoned Campground
7.4%inclusion2 decks27 decks
7%synergy
Fetid Heath
7.4%inclusion2 decks27 decks
-5%synergy
Valgavoth's Lair
7.4%inclusion2 decks27 decks
5%synergy
Raffine's Tower
7.4%inclusion2 decks27 decks
-33%synergy
Promising Vein
7.4%inclusion2 decks27 decks
7%synergy
Shineshadow Snarl
7.4%inclusion2 decks27 decks
-3%synergy
Choked Estuary
7.4%inclusion2 decks27 decks
-9%synergy
Waterlogged Teachings
7.4%inclusion2 decks27 decks
3%synergy
Dismal Backwater
7.4%inclusion2 decks27 decks
1%synergy
Myriad Landscape
7.4%inclusion2 decks27 decks
-1%synergy
Spire of Industry
7.4%inclusion2 decks27 decks
-1%synergy
Vibrant Cityscape
6.7%inclusion1 decks15 decks
6%synergy
University Campus
6.7%inclusion1 decks15 decks
6%synergy
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