The Master of Keys (Commander) - Budget Optimized

The Master of Keys
Rank #315
24decks
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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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Utility Artifacts
Enchantments
Utility Lands
Mana Artifacts
Lands
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Honest Work
25%inclusion1 decks4 decks
25%synergy
High Synergy Cards
Mesa Enchantress
92%inclusion22 decks24 decks
83%synergy
Secret Arcade // Dusty Parlor
83%inclusion20 decks24 decks
78%synergy
Ondu Spiritdancer
83%inclusion20 decks24 decks
77%synergy
Starfield Mystic
83%inclusion20 decks24 decks
77%synergy
Demon of Fate's Design
75%inclusion18 decks24 decks
69%synergy
Mirrormade
71%inclusion17 decks24 decks
61%synergy
Doomwake Giant
67%inclusion16 decks24 decks
61%synergy
Inquisitive Glimmer
67%inclusion16 decks24 decks
59%synergy
Hall of Heliod's Generosity
71%inclusion17 decks24 decks
58%synergy
Gravebreaker Lamia
58%inclusion14 decks24 decks
57%synergy
Top Cards
Swords to Plowshares
71%inclusion17 decks24 decks
3%synergy
Sigil of the Empty Throne
63%inclusion15 decks24 decks
57%synergy
Sphere of Safety
63%inclusion15 decks24 decks
53%synergy
Fear of Sleep Paralysis
58%inclusion14 decks24 decks
53%synergy
Scrabbling Skullcrab
58%inclusion14 decks24 decks
57%synergy
Extravagant Replication
58%inclusion14 decks24 decks
53%synergy
Moon-Blessed Cleric
54%inclusion13 decks24 decks
49%synergy
Arcane Denial
54%inclusion13 decks24 decks
34%synergy
Shark Typhoon
50%inclusion12 decks24 decks
44%synergy
Timely Ward
50%inclusion12 decks24 decks
45%synergy
Game Changers
Gifts Ungiven
8.3%inclusion2 decks24 decks
6%synergy
Notion Thief
8.3%inclusion2 decks24 decks
1%synergy
Creatures
Archetype of Imagination
50%inclusion12 decks24 decks
45%synergy
Soaring Lightbringer
50%inclusion12 decks24 decks
45%synergy
Entity Tracker
46%inclusion11 decks24 decks
39%synergy
Ghostly Dancers
42%inclusion10 decks24 decks
39%synergy
Overlord of the Floodpits
42%inclusion10 decks24 decks
38%synergy
Fear of Impostors
42%inclusion10 decks24 decks
40%synergy
Victor, Valgavoth's Seneschal
42%inclusion10 decks24 decks
40%synergy
Nightmare Shepherd
38%inclusion9 decks24 decks
35%synergy
Aminatou, Veil Piercer
38%inclusion9 decks24 decks
36%synergy
Balemurk Leech
33%inclusion8 decks24 decks
33%synergy
Solemn Simulacrum
33%inclusion8 decks24 decks
18%synergy
Athreos, Shroud-Veiled
29%inclusion7 decks24 decks
25%synergy
Gremlin Tamer
29%inclusion7 decks24 decks
28%synergy
Grim Guardian
29%inclusion7 decks24 decks
27%synergy
Zur, Eternal Schemer
29%inclusion7 decks24 decks
26%synergy
Skullsnap Nuisance
25%inclusion6 decks24 decks
25%synergy
Zur the Enchanter
25%inclusion6 decks24 decks
20%synergy
Mindwrack Harpy
25%inclusion6 decks24 decks
25%synergy
Silent Hallcreeper
25%inclusion6 decks24 decks
21%synergy
Ancient Cellarspawn
25%inclusion6 decks24 decks
22%synergy
Overlord of the Balemurk
21%inclusion5 decks24 decks
19%synergy
Heliod, the Radiant Dawn
21%inclusion5 decks24 decks
17%synergy
Archon of Sun's Grace
17%inclusion4 decks24 decks
12%synergy
Burnished Hart
17%inclusion4 decks24 decks
13%synergy
Enduring Curiosity
17%inclusion4 decks24 decks
9%synergy
Auramancer
17%inclusion4 decks24 decks
14%synergy
Abdel Adrian, Gorion's Ward
17%inclusion4 decks24 decks
15%synergy
Phenomenon Investigators
17%inclusion4 decks24 decks
16%synergy
Metamorphosis Fanatic
13%inclusion3 decks24 decks
8%synergy
Optimistic Scavenger
13%inclusion3 decks24 decks
12%synergy
Hedron Crab
13%inclusion3 decks24 decks
12%synergy
Laboratory Maniac
13%inclusion3 decks24 decks
9%synergy
Verge Rangers
13%inclusion3 decks24 decks
11%synergy
Starnheim Courser
8.3%inclusion2 decks24 decks
4%synergy
Spirit of the Labyrinth
8.3%inclusion2 decks24 decks
8%synergy
Protean Thaumaturge
8.3%inclusion2 decks24 decks
8%synergy
Fear of Lost Teeth
8.3%inclusion2 decks24 decks
8%synergy
Sage of Mysteries
8.3%inclusion2 decks24 decks
8%synergy
Stitcher's Supplier
8.3%inclusion2 decks24 decks
8%synergy
Arvinox, the Mind Flail
8.3%inclusion2 decks24 decks
7%synergy
Valgavoth's Faithful
8.3%inclusion2 decks24 decks
8%synergy
Ledger Shredder
8.3%inclusion2 decks24 decks
-1%synergy
Lotho, Corrupt Shirriff
8.3%inclusion2 decks24 decks
-8%synergy
Hydroelectric Specimen
8.3%inclusion2 decks24 decks
6%synergy
Leonin Relic-Warder
8.3%inclusion2 decks24 decks
8%synergy
Spirited Companion
8.3%inclusion2 decks24 decks
6%synergy
Appendage Amalgam
8.3%inclusion2 decks24 decks
8%synergy
Nashi, Searcher in the Dark
8.3%inclusion2 decks24 decks
8%synergy
Toxrill, the Corrosive
8.3%inclusion2 decks24 decks
6%synergy
Ketramose, the New Dawn
8.3%inclusion2 decks24 decks
8%synergy
Instants
Inkshield
50%inclusion12 decks24 decks
41%synergy
Thirst for Meaning
42%inclusion10 decks24 decks
40%synergy
Otherworldly Gaze
38%inclusion9 decks24 decks
35%synergy
Brainstorm
33%inclusion8 decks24 decks
16%synergy
Utter End
33%inclusion8 decks24 decks
26%synergy
Counterspell
29%inclusion7 decks24 decks
-12%synergy
Return to Dust
25%inclusion6 decks24 decks
21%synergy
Path to Exile
21%inclusion5 decks24 decks
-21%synergy
Telling Time
17%inclusion4 decks24 decks
14%synergy
Opt
13%inclusion3 decks24 decks
8%synergy
Dovin's Veto
13%inclusion3 decks24 decks
-12%synergy
Frantic Search
13%inclusion3 decks24 decks
-4%synergy
Dark Ritual
8.3%inclusion2 decks24 decks
-11%synergy
Dispel
8.3%inclusion2 decks24 decks
5%synergy
Mana Leak
8.3%inclusion2 decks24 decks
6%synergy
An Offer You Can't Refuse
8.3%inclusion2 decks24 decks
-18%synergy
Lim-Dûl's Vault
8.3%inclusion2 decks24 decks
5%synergy
Delay
8.3%inclusion2 decks24 decks
6%synergy
Spell Pierce
8.3%inclusion2 decks24 decks
6%synergy
Heliod's Intervention
8.3%inclusion2 decks24 decks
7%synergy
Sorceries
Redress Fate
50%inclusion12 decks24 decks
44%synergy
Time Wipe
33%inclusion8 decks24 decks
26%synergy
Read the Bones
29%inclusion7 decks24 decks
25%synergy
Sevinne's Reclamation
25%inclusion6 decks24 decks
16%synergy
Terminus
25%inclusion6 decks24 decks
21%synergy
Ponder
21%inclusion5 decks24 decks
12%synergy
Extinguish All Hope
21%inclusion5 decks24 decks
19%synergy
Diabolic Vision
21%inclusion5 decks24 decks
19%synergy
Entreat the Angels
17%inclusion4 decks24 decks
15%synergy
Aminatou's Augury
17%inclusion4 decks24 decks
15%synergy
Portent
17%inclusion4 decks24 decks
13%synergy
Windfall
17%inclusion4 decks24 decks
3%synergy
Lively Dirge
17%inclusion4 decks24 decks
15%synergy
Strategic Planning
8.3%inclusion2 decks24 decks
8%synergy
Unmarked Grave
8.3%inclusion2 decks24 decks
7%synergy
Farewell
8.3%inclusion2 decks24 decks
-5%synergy
Dance of the Manse
8.3%inclusion2 decks24 decks
5%synergy
Commune with Evil
8.3%inclusion2 decks24 decks
8%synergy
Feed the Swarm
8.3%inclusion2 decks24 decks
5%synergy
Ringsight
8.3%inclusion2 decks24 decks
7%synergy
Demonic Counsel
8.3%inclusion2 decks24 decks
7%synergy
Damn
8.3%inclusion2 decks24 decks
-12%synergy
Singularity Rupture
7.7%inclusion1 decks13 decks
5%synergy
Utility Artifacts
Cloud Key
13%inclusion3 decks24 decks
9%synergy
Keys to the House
13%inclusion3 decks24 decks
12%synergy
Brainstone
8.3%inclusion2 decks24 decks
7%synergy
Soul-Guide Lantern
8.3%inclusion2 decks24 decks
7%synergy
Wishclaw Talisman
8.3%inclusion2 decks24 decks
0%synergy
Enchantments
Monologue Tax
42%inclusion10 decks24 decks
36%synergy
Bottomless Pool // Locker Room
42%inclusion10 decks24 decks
40%synergy
One with the Multiverse
42%inclusion10 decks24 decks
37%synergy
Cramped Vents // Access Maze
38%inclusion9 decks24 decks
35%synergy
Dress Down
33%inclusion8 decks24 decks
31%synergy
Ripples of Undeath
33%inclusion8 decks24 decks
31%synergy
Cast Out
33%inclusion8 decks24 decks
30%synergy
Seal of Cleansing
33%inclusion8 decks24 decks
32%synergy
Animate Dead
33%inclusion8 decks24 decks
24%synergy
The Eldest Reborn
29%inclusion7 decks24 decks
27%synergy
Estrid's Invocation
25%inclusion6 decks24 decks
20%synergy
Cemetery Tampering
25%inclusion6 decks24 decks
24%synergy
Propaganda
25%inclusion6 decks24 decks
-1%synergy
Defiled Crypt // Cadaver Lab
25%inclusion6 decks24 decks
24%synergy
Necromancy
21%inclusion5 decks24 decks
16%synergy
Amphibian Downpour
21%inclusion5 decks24 decks
16%synergy
Witness Protection
21%inclusion5 decks24 decks
19%synergy
Restricted Office // Lecture Hall
21%inclusion5 decks24 decks
19%synergy
Secrets of the Dead
21%inclusion5 decks24 decks
21%synergy
Enchanted Evening
21%inclusion5 decks24 decks
19%synergy
Ghostly Prison
21%inclusion5 decks24 decks
-1%synergy
Cacophony Unleashed
21%inclusion5 decks24 decks
19%synergy
Unable to Scream
21%inclusion5 decks24 decks
20%synergy
Meat Locker // Drowned Diner
21%inclusion5 decks24 decks
20%synergy
Nowhere to Run
21%inclusion5 decks24 decks
20%synergy
Ethereal Armor
21%inclusion5 decks24 decks
16%synergy
Grasp of Fate
21%inclusion5 decks24 decks
15%synergy
Sheltered by Ghosts
21%inclusion5 decks24 decks
18%synergy
Mirror Room // Fractured Realm
21%inclusion5 decks24 decks
18%synergy
Seal of Removal
21%inclusion5 decks24 decks
20%synergy
Spirit-Sister's Call
17%inclusion4 decks24 decks
15%synergy
Derelict Attic // Widow's Walk
17%inclusion4 decks24 decks
16%synergy
Central Elevator // Promising Stairs
17%inclusion4 decks24 decks
16%synergy
Polluted Cistern // Dim Oubliette
17%inclusion4 decks24 decks
16%synergy
Stillness in Motion
16%inclusion3 decks19 decks
15%synergy
Soul Snare
13%inclusion3 decks24 decks
12%synergy
Touch the Spirit Realm
13%inclusion3 decks24 decks
10%synergy
Blind Obedience
13%inclusion3 decks24 decks
0%synergy
The Tale of Tamiyo
13%inclusion3 decks24 decks
12%synergy
Dazzling Theater // Prop Room
13%inclusion3 decks24 decks
11%synergy
Hallowed Haunting
13%inclusion3 decks24 decks
10%synergy
Founding the Third Path
13%inclusion3 decks24 decks
12%synergy
Trapped in the Screen
13%inclusion3 decks24 decks
12%synergy
Curator's Ward
13%inclusion3 decks24 decks
10%synergy
Surgical Suite // Hospital Room
13%inclusion3 decks24 decks
12%synergy
Mystic Remora
13%inclusion3 decks24 decks
-9%synergy
All That Glitters
13%inclusion3 decks24 decks
4%synergy
Phyrexian Arena
13%inclusion3 decks24 decks
-1%synergy
Darksteel Mutation
8.3%inclusion2 decks24 decks
2%synergy
Omen of the Dead
8.3%inclusion2 decks24 decks
8%synergy
Utility Lands
Bojuka Bog
63%inclusion15 decks24 decks
35%synergy
Halimar Depths
46%inclusion11 decks24 decks
41%synergy
Reliquary Tower
8.3%inclusion2 decks24 decks
-25%synergy
Vault of the Archangel
8.3%inclusion2 decks24 decks
2%synergy
Cephalid Coliseum
8.3%inclusion2 decks24 decks
5%synergy
Temple of the False God
8.3%inclusion2 decks24 decks
1%synergy
Mana Artifacts
Sol Ring
88%inclusion21 decks24 decks
-2%synergy
Arcane Signet
88%inclusion21 decks24 decks
0%synergy
Azorius Signet
63%inclusion15 decks24 decks
30%synergy
Orzhov Signet
58%inclusion14 decks24 decks
24%synergy
Mind Stone
42%inclusion10 decks24 decks
29%synergy
Commander's Sphere
38%inclusion9 decks24 decks
18%synergy
Fellwar Stone
33%inclusion8 decks24 decks
-1%synergy
Dimir Signet
25%inclusion6 decks24 decks
-8%synergy
Talisman of Progress
25%inclusion6 decks24 decks
-18%synergy
Talisman of Dominance
17%inclusion4 decks24 decks
-32%synergy
Talisman of Hierarchy
17%inclusion4 decks24 decks
-26%synergy
Chromatic Lantern
8.3%inclusion2 decks24 decks
-5%synergy
Lands
Swamp
100%inclusion24 decks24 decks
9%synergy
Plains
100%inclusion24 decks24 decks
9%synergy
Island
96%inclusion23 decks24 decks
3%synergy
Command Tower
92%inclusion22 decks24 decks
-1%synergy
Caves of Koilos
75%inclusion18 decks24 decks
40%synergy
Underground River
75%inclusion18 decks24 decks
43%synergy
Adarkar Wastes
75%inclusion18 decks24 decks
44%synergy
Temple of Silence
75%inclusion18 decks24 decks
55%synergy
Terramorphic Expanse
75%inclusion18 decks24 decks
58%synergy
Orzhov Basilica
75%inclusion18 decks24 decks
59%synergy
Arcane Sanctum
75%inclusion18 decks24 decks
20%synergy
Azorius Chancery
71%inclusion17 decks24 decks
56%synergy
Obscura Storefront
71%inclusion17 decks24 decks
60%synergy
Temple of Deceit
71%inclusion17 decks24 decks
53%synergy
Tainted Isle
67%inclusion16 decks24 decks
60%synergy
Tainted Field
67%inclusion16 decks24 decks
60%synergy
Temple of Enlightenment
67%inclusion16 decks24 decks
50%synergy
Evolving Wilds
67%inclusion16 decks24 decks
41%synergy
Dimir Aqueduct
58%inclusion14 decks24 decks
44%synergy
Ash Barrens
54%inclusion13 decks24 decks
43%synergy
Thriving Moor
38%inclusion9 decks24 decks
33%synergy
Thriving Heath
38%inclusion9 decks24 decks
33%synergy
Thriving Isle
38%inclusion9 decks24 decks
33%synergy
Exotic Orchard
33%inclusion8 decks24 decks
-25%synergy
Glacial Fortress
29%inclusion7 decks24 decks
-10%synergy
Darkwater Catacombs
25%inclusion6 decks24 decks
11%synergy
Prairie Stream
25%inclusion6 decks24 decks
-16%synergy
Skycloud Expanse
25%inclusion6 decks24 decks
10%synergy
Sunken Hollow
21%inclusion5 decks24 decks
-19%synergy
Isolated Chapel
17%inclusion4 decks24 decks
-22%synergy
Contaminated Landscape
17%inclusion4 decks24 decks
2%synergy
Myriad Landscape
13%inclusion3 decks24 decks
4%synergy
Port Town
13%inclusion3 decks24 decks
-4%synergy
Drowned Catacomb
13%inclusion3 decks24 decks
-23%synergy
River of Tears
13%inclusion3 decks24 decks
10%synergy
Choked Estuary
13%inclusion3 decks24 decks
-4%synergy
Brightclimb Pathway
8.3%inclusion2 decks24 decks
1%synergy
Dismal Backwater
8.3%inclusion2 decks24 decks
2%synergy
Hydroelectric Specimen
8.3%inclusion2 decks24 decks
6%synergy
Raffine's Tower
8.3%inclusion2 decks24 decks
-33%synergy
Promising Vein
8.3%inclusion2 decks24 decks
8%synergy
Fabled Passage
8.3%inclusion2 decks24 decks
1%synergy
Path of Ancestry
8.3%inclusion2 decks24 decks
-19%synergy
Shineshadow Snarl
8.3%inclusion2 decks24 decks
-2%synergy
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