The Master of Keys (Commander) - Budget Optimized

The Master of Keys
Rank #312
25decks
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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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Enchantments
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Utility Lands
Mana Artifacts
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Aang's Iceberg
7.1%inclusion1 decks14 decks
7%synergy
High Synergy Cards
Mesa Enchantress
84%inclusion21 decks25 decks
75%synergy
Ondu Spiritdancer
76%inclusion19 decks25 decks
70%synergy
Starfield Mystic
76%inclusion19 decks25 decks
69%synergy
Secret Arcade // Dusty Parlor
72%inclusion18 decks25 decks
67%synergy
Scrabbling Skullcrab
68%inclusion17 decks25 decks
67%synergy
Demon of Fate's Design
68%inclusion17 decks25 decks
63%synergy
Mirrormade
72%inclusion18 decks25 decks
62%synergy
Inquisitive Glimmer
68%inclusion17 decks25 decks
60%synergy
Gravebreaker Lamia
56%inclusion14 decks25 decks
55%synergy
Doomwake Giant
56%inclusion14 decks25 decks
50%synergy
Top Cards
Swords to Plowshares
68%inclusion17 decks25 decks
0%synergy
Extravagant Replication
52%inclusion13 decks25 decks
47%synergy
Sphere of Safety
52%inclusion13 decks25 decks
43%synergy
Entity Tracker
52%inclusion13 decks25 decks
46%synergy
Sigil of the Empty Throne
52%inclusion13 decks25 decks
46%synergy
Fear of Impostors
48%inclusion12 decks25 decks
46%synergy
Moon-Blessed Cleric
48%inclusion12 decks25 decks
43%synergy
Fear of Sleep Paralysis
48%inclusion12 decks25 decks
42%synergy
Arcane Denial
44%inclusion11 decks25 decks
24%synergy
Soaring Lightbringer
44%inclusion11 decks25 decks
39%synergy
Game Changers
Gifts Ungiven
16%inclusion4 decks25 decks
14%synergy
Notion Thief
12%inclusion3 decks25 decks
5%synergy
Creatures
Archetype of Imagination
44%inclusion11 decks25 decks
39%synergy
Overlord of the Floodpits
40%inclusion10 decks25 decks
36%synergy
Victor, Valgavoth's Seneschal
40%inclusion10 decks25 decks
38%synergy
Ghostly Dancers
40%inclusion10 decks25 decks
37%synergy
Balemurk Leech
32%inclusion8 decks25 decks
31%synergy
Aminatou, Veil Piercer
32%inclusion8 decks25 decks
31%synergy
Athreos, Shroud-Veiled
28%inclusion7 decks25 decks
24%synergy
Gremlin Tamer
28%inclusion7 decks25 decks
27%synergy
Nightmare Shepherd
28%inclusion7 decks25 decks
26%synergy
Skullsnap Nuisance
28%inclusion7 decks25 decks
28%synergy
Grim Guardian
28%inclusion7 decks25 decks
25%synergy
Zur, Eternal Schemer
28%inclusion7 decks25 decks
25%synergy
Zur the Enchanter
28%inclusion7 decks25 decks
23%synergy
Abdel Adrian, Gorion's Ward
24%inclusion6 decks25 decks
22%synergy
Solemn Simulacrum
24%inclusion6 decks25 decks
9%synergy
Silent Hallcreeper
24%inclusion6 decks25 decks
20%synergy
Ancient Cellarspawn
20%inclusion5 decks25 decks
17%synergy
Overlord of the Balemurk
20%inclusion5 decks25 decks
18%synergy
Heliod, the Radiant Dawn
20%inclusion5 decks25 decks
16%synergy
Hedron Crab
20%inclusion5 decks25 decks
19%synergy
Nashi, Searcher in the Dark
20%inclusion5 decks25 decks
20%synergy
Mindwrack Harpy
20%inclusion5 decks25 decks
20%synergy
Archon of Sun's Grace
16%inclusion4 decks25 decks
11%synergy
Leonin Relic-Warder
16%inclusion4 decks25 decks
16%synergy
Enduring Curiosity
16%inclusion4 decks25 decks
8%synergy
Laboratory Maniac
16%inclusion4 decks25 decks
13%synergy
Optimistic Scavenger
16%inclusion4 decks25 decks
16%synergy
Burnished Hart
16%inclusion4 decks25 decks
13%synergy
Auramancer
16%inclusion4 decks25 decks
13%synergy
Phenomenon Investigators
16%inclusion4 decks25 decks
15%synergy
Ledger Shredder
16%inclusion4 decks25 decks
7%synergy
Lotho, Corrupt Shirriff
12%inclusion3 decks25 decks
-5%synergy
Hydroelectric Specimen
12%inclusion3 decks25 decks
9%synergy
Ashiok's Reaper
12%inclusion3 decks25 decks
12%synergy
Verge Rangers
12%inclusion3 decks25 decks
11%synergy
Warehouse Tabby
12%inclusion3 decks25 decks
12%synergy
Starnheim Courser
12%inclusion3 decks25 decks
8%synergy
Lurrus of the Dream-Den
12%inclusion3 decks25 decks
10%synergy
Malevolent Hermit
12%inclusion3 decks25 decks
11%synergy
Ghostly Pilferer
12%inclusion3 decks25 decks
5%synergy
Sun-Spider, Nimble Webber
8.3%inclusion1 decks12 decks
8%synergy
Metamorphosis Fanatic
8.0%inclusion2 decks25 decks
3%synergy
Spirit of the Labyrinth
8.0%inclusion2 decks25 decks
7%synergy
Sage of Mysteries
8.0%inclusion2 decks25 decks
8%synergy
Overlord of the Mistmoors
8.0%inclusion2 decks25 decks
6%synergy
Arvinox, the Mind Flail
8.0%inclusion2 decks25 decks
6%synergy
Toxrill, the Corrosive
8.0%inclusion2 decks25 decks
5%synergy
Aura Thief
8.0%inclusion2 decks25 decks
7%synergy
Ketramose, the New Dawn
8.0%inclusion2 decks25 decks
8%synergy
Protean Thaumaturge
8.0%inclusion2 decks25 decks
7%synergy
Instants
Inkshield
40%inclusion10 decks25 decks
31%synergy
Counterspell
36%inclusion9 decks25 decks
-5%synergy
Otherworldly Gaze
36%inclusion9 decks25 decks
34%synergy
Thirst for Meaning
32%inclusion8 decks25 decks
31%synergy
Path to Exile
28%inclusion7 decks25 decks
-14%synergy
Brainstorm
28%inclusion7 decks25 decks
11%synergy
Utter End
24%inclusion6 decks25 decks
17%synergy
Return to Dust
20%inclusion5 decks25 decks
16%synergy
Dovin's Veto
16%inclusion4 decks25 decks
-9%synergy
Frantic Search
16%inclusion4 decks25 decks
-1%synergy
An Offer You Can't Refuse
16%inclusion4 decks25 decks
-11%synergy
Delay
16%inclusion4 decks25 decks
14%synergy
Shred Memory
12%inclusion3 decks25 decks
12%synergy
Darkblast
12%inclusion3 decks25 decks
12%synergy
Mana Leak
12%inclusion3 decks25 decks
10%synergy
Muddle the Mixture
12%inclusion3 decks25 decks
8%synergy
Telling Time
12%inclusion3 decks25 decks
10%synergy
Negate
12%inclusion3 decks25 decks
-4%synergy
Dark Ritual
12%inclusion3 decks25 decks
-7%synergy
Opt
12%inclusion3 decks25 decks
8%synergy
Lim-Dûl's Vault
12%inclusion3 decks25 decks
9%synergy
No More Lies
12%inclusion3 decks25 decks
11%synergy
Soul Partition
8.0%inclusion2 decks25 decks
8%synergy
Banishing Knack
8.0%inclusion2 decks25 decks
8%synergy
Winds of Rebuke
8.0%inclusion2 decks25 decks
8%synergy
Spell Pierce
8.0%inclusion2 decks25 decks
5%synergy
Retraction Helix
8.0%inclusion2 decks25 decks
7%synergy
Dispel
8.0%inclusion2 decks25 decks
4%synergy
Disenchant
8.0%inclusion2 decks25 decks
6%synergy
Heliod's Intervention
8.0%inclusion2 decks25 decks
6%synergy
Sorceries
Redress Fate
44%inclusion11 decks25 decks
38%synergy
Sevinne's Reclamation
32%inclusion8 decks25 decks
23%synergy
Time Wipe
24%inclusion6 decks25 decks
17%synergy
Lively Dirge
24%inclusion6 decks25 decks
23%synergy
Read the Bones
20%inclusion5 decks25 decks
16%synergy
Terminus
20%inclusion5 decks25 decks
16%synergy
Extinguish All Hope
20%inclusion5 decks25 decks
18%synergy
Demonic Counsel
16%inclusion4 decks25 decks
15%synergy
Ponder
16%inclusion4 decks25 decks
7%synergy
Windfall
16%inclusion4 decks25 decks
2%synergy
Unmarked Grave
16%inclusion4 decks25 decks
15%synergy
Supreme Verdict
12%inclusion3 decks25 decks
-3%synergy
Entreat the Angels
12%inclusion3 decks25 decks
10%synergy
Portent
12%inclusion3 decks25 decks
9%synergy
Diabolic Vision
12%inclusion3 decks25 decks
10%synergy
Buried Alive
12%inclusion3 decks25 decks
8%synergy
Final Parting
12%inclusion3 decks25 decks
11%synergy
Commune with Evil
8.0%inclusion2 decks25 decks
8%synergy
Farewell
8.0%inclusion2 decks25 decks
-5%synergy
Damn
8.0%inclusion2 decks25 decks
-12%synergy
Aminatou's Augury
8.0%inclusion2 decks25 decks
7%synergy
Dance of the Manse
8.0%inclusion2 decks25 decks
4%synergy
Ringsight
8.0%inclusion2 decks25 decks
7%synergy
Singularity Rupture
6.7%inclusion1 decks15 decks
4%synergy
Utility Artifacts
Wishclaw Talisman
16%inclusion4 decks25 decks
8%synergy
Keys to the House
12%inclusion3 decks25 decks
12%synergy
Cloud Key
12%inclusion3 decks25 decks
9%synergy
Helm of the Gods
8.0%inclusion2 decks25 decks
7%synergy
Soul-Guide Lantern
8.0%inclusion2 decks25 decks
7%synergy
Swiftfoot Boots
8.0%inclusion2 decks25 decks
-16%synergy
Enchantments
Timely Ward
44%inclusion11 decks25 decks
39%synergy
Shark Typhoon
40%inclusion10 decks25 decks
34%synergy
Monologue Tax
40%inclusion10 decks25 decks
34%synergy
Ripples of Undeath
40%inclusion10 decks25 decks
37%synergy
Animate Dead
40%inclusion10 decks25 decks
30%synergy
Dress Down
40%inclusion10 decks25 decks
38%synergy
Bottomless Pool // Locker Room
36%inclusion9 decks25 decks
34%synergy
Seal of Cleansing
32%inclusion8 decks25 decks
31%synergy
Cramped Vents // Access Maze
32%inclusion8 decks25 decks
29%synergy
One with the Multiverse
32%inclusion8 decks25 decks
27%synergy
Amphibian Downpour
28%inclusion7 decks25 decks
23%synergy
Cast Out
28%inclusion7 decks25 decks
25%synergy
Defiled Crypt // Cadaver Lab
28%inclusion7 decks25 decks
27%synergy
Grasp of Fate
24%inclusion6 decks25 decks
18%synergy
The Eldest Reborn
24%inclusion6 decks25 decks
22%synergy
Mystic Remora
24%inclusion6 decks25 decks
3%synergy
Cemetery Tampering
24%inclusion6 decks25 decks
23%synergy
Nowhere to Run
24%inclusion6 decks25 decks
23%synergy
Necromancy
24%inclusion6 decks25 decks
19%synergy
Estrid's Invocation
24%inclusion6 decks25 decks
19%synergy
Sheltered by Ghosts
24%inclusion6 decks25 decks
21%synergy
Founding the Third Path
20%inclusion5 decks25 decks
20%synergy
Unable to Scream
20%inclusion5 decks25 decks
19%synergy
Meat Locker // Drowned Diner
20%inclusion5 decks25 decks
19%synergy
Propaganda
20%inclusion5 decks25 decks
-7%synergy
Cacophony Unleashed
20%inclusion5 decks25 decks
18%synergy
Blind Obedience
20%inclusion5 decks25 decks
8%synergy
Ethereal Armor
20%inclusion5 decks25 decks
15%synergy
Mirror Room // Fractured Realm
20%inclusion5 decks25 decks
18%synergy
Restricted Office // Lecture Hall
20%inclusion5 decks25 decks
18%synergy
Enchanted Evening
20%inclusion5 decks25 decks
18%synergy
Seal of Removal
20%inclusion5 decks25 decks
19%synergy
Touch the Spirit Realm
16%inclusion4 decks25 decks
13%synergy
Central Elevator // Promising Stairs
16%inclusion4 decks25 decks
15%synergy
Witness Protection
16%inclusion4 decks25 decks
14%synergy
Secrets of the Dead
16%inclusion4 decks25 decks
16%synergy
Tinybones Joins Up
16%inclusion4 decks25 decks
15%synergy
Polluted Cistern // Dim Oubliette
16%inclusion4 decks25 decks
15%synergy
Derelict Attic // Widow's Walk
16%inclusion4 decks25 decks
16%synergy
Static Prison
16%inclusion4 decks25 decks
16%synergy
Aura of Silence
16%inclusion4 decks25 decks
13%synergy
Stillness in Motion
15%inclusion3 decks20 decks
15%synergy
Darksteel Mutation
12%inclusion3 decks25 decks
6%synergy
Trapped in the Screen
12%inclusion3 decks25 decks
11%synergy
Grievous Wound
12%inclusion3 decks25 decks
11%synergy
Ghostly Prison
12%inclusion3 decks25 decks
-10%synergy
Soul Snare
12%inclusion3 decks25 decks
12%synergy
Spirit-Sister's Call
12%inclusion3 decks25 decks
11%synergy
The Tale of Tamiyo
12%inclusion3 decks25 decks
12%synergy
Screams from Within
12%inclusion3 decks25 decks
12%synergy
Planeswalkers
Ashiok, Dream Render
8.0%inclusion2 decks25 decks
6%synergy
Utility Lands
Hall of Heliod's Generosity
60%inclusion15 decks25 decks
47%synergy
Bojuka Bog
52%inclusion13 decks25 decks
25%synergy
Halimar Depths
36%inclusion9 decks25 decks
31%synergy
Cephalid Coliseum
16%inclusion4 decks25 decks
12%synergy
Reliquary Tower
8.0%inclusion2 decks25 decks
-26%synergy
Rogue's Passage
8.0%inclusion2 decks25 decks
-1%synergy
Mana Artifacts
Arcane Signet
88%inclusion22 decks25 decks
0%synergy
Sol Ring
88%inclusion22 decks25 decks
-2%synergy
Azorius Signet
60%inclusion15 decks25 decks
28%synergy
Orzhov Signet
56%inclusion14 decks25 decks
22%synergy
Mind Stone
40%inclusion10 decks25 decks
27%synergy
Commander's Sphere
32%inclusion8 decks25 decks
13%synergy
Fellwar Stone
32%inclusion8 decks25 decks
-2%synergy
Talisman of Progress
32%inclusion8 decks25 decks
-11%synergy
Talisman of Dominance
28%inclusion7 decks25 decks
-21%synergy
Talisman of Hierarchy
28%inclusion7 decks25 decks
-15%synergy
Dimir Signet
24%inclusion6 decks25 decks
-8%synergy
Lands
Plains
100%inclusion25 decks25 decks
9%synergy
Swamp
100%inclusion25 decks25 decks
9%synergy
Island
96%inclusion24 decks25 decks
3%synergy
Command Tower
92%inclusion23 decks25 decks
0%synergy
Adarkar Wastes
80%inclusion20 decks25 decks
49%synergy
Caves of Koilos
76%inclusion19 decks25 decks
41%synergy
Underground River
76%inclusion19 decks25 decks
43%synergy
Terramorphic Expanse
72%inclusion18 decks25 decks
55%synergy
Temple of Silence
68%inclusion17 decks25 decks
48%synergy
Tainted Field
64%inclusion16 decks25 decks
57%synergy
Arcane Sanctum
64%inclusion16 decks25 decks
10%synergy
Orzhov Basilica
64%inclusion16 decks25 decks
48%synergy
Tainted Isle
64%inclusion16 decks25 decks
58%synergy
Temple of Deceit
64%inclusion16 decks25 decks
46%synergy
Temple of Enlightenment
60%inclusion15 decks25 decks
43%synergy
Obscura Storefront
60%inclusion15 decks25 decks
50%synergy
Azorius Chancery
60%inclusion15 decks25 decks
46%synergy
Evolving Wilds
60%inclusion15 decks25 decks
35%synergy
Dimir Aqueduct
52%inclusion13 decks25 decks
38%synergy
Ash Barrens
48%inclusion12 decks25 decks
37%synergy
Exotic Orchard
40%inclusion10 decks25 decks
-19%synergy
Glacial Fortress
36%inclusion9 decks25 decks
-4%synergy
Thriving Isle
32%inclusion8 decks25 decks
28%synergy
Thriving Heath
32%inclusion8 decks25 decks
28%synergy
Prairie Stream
32%inclusion8 decks25 decks
-9%synergy
Thriving Moor
32%inclusion8 decks25 decks
28%synergy
Skycloud Expanse
28%inclusion7 decks25 decks
13%synergy
Sunken Hollow
28%inclusion7 decks25 decks
-12%synergy
Isolated Chapel
24%inclusion6 decks25 decks
-15%synergy
Darkwater Catacombs
20%inclusion5 decks25 decks
6%synergy
River of Tears
20%inclusion5 decks25 decks
18%synergy
Drowned Catacomb
20%inclusion5 decks25 decks
-16%synergy
Contaminated Landscape
16%inclusion4 decks25 decks
2%synergy
Spire of Industry
12%inclusion3 decks25 decks
3%synergy
Hydroelectric Specimen
12%inclusion3 decks25 decks
9%synergy
Dismal Backwater
12%inclusion3 decks25 decks
6%synergy
Myriad Landscape
12%inclusion3 decks25 decks
3%synergy
Choked Estuary
12%inclusion3 decks25 decks
-4%synergy
Fabled Passage
8.0%inclusion2 decks25 decks
1%synergy
Raffine's Tower
8.0%inclusion2 decks25 decks
-33%synergy
Promising Vein
8.0%inclusion2 decks25 decks
8%synergy
Murky Sewer
8.0%inclusion2 decks25 decks
8%synergy
Brightclimb Pathway
8.0%inclusion2 decks25 decks
1%synergy
Fetid Heath
8.0%inclusion2 decks25 decks
-4%synergy
Port Town
8.0%inclusion2 decks25 decks
-9%synergy
Path of Ancestry
8.0%inclusion2 decks25 decks
-19%synergy
Shineshadow Snarl
8.0%inclusion2 decks25 decks
-2%synergy
Scoured Barrens
8.0%inclusion2 decks25 decks
2%synergy
Treno, Dark City
5.3%inclusion1 decks19 decks
4%synergy
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