The Master of Keys (Commander) - Budget Optimized

The Master of Keys
Rank #316
23decks
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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
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
87%inclusion20 decks23 decks
78%synergy
Secret Arcade // Dusty Parlor
78%inclusion18 decks23 decks
73%synergy
Ondu Spiritdancer
78%inclusion18 decks23 decks
72%synergy
Starfield Mystic
78%inclusion18 decks23 decks
72%synergy
Mirrormade
74%inclusion17 decks23 decks
64%synergy
Demon of Fate's Design
70%inclusion16 decks23 decks
64%synergy
Hall of Heliod's Generosity
74%inclusion17 decks23 decks
61%synergy
Doomwake Giant
65%inclusion15 decks23 decks
59%synergy
Inquisitive Glimmer
65%inclusion15 decks23 decks
57%synergy
Gravebreaker Lamia
57%inclusion13 decks23 decks
56%synergy
Top Cards
Swords to Plowshares
74%inclusion17 decks23 decks
6%synergy
Sphere of Safety
61%inclusion14 decks23 decks
51%synergy
Sigil of the Empty Throne
61%inclusion14 decks23 decks
55%synergy
Fear of Sleep Paralysis
57%inclusion13 decks23 decks
51%synergy
Scrabbling Skullcrab
57%inclusion13 decks23 decks
55%synergy
Extravagant Replication
57%inclusion13 decks23 decks
51%synergy
Archetype of Imagination
52%inclusion12 decks23 decks
48%synergy
Moon-Blessed Cleric
52%inclusion12 decks23 decks
47%synergy
Inkshield
52%inclusion12 decks23 decks
43%synergy
Timely Ward
52%inclusion12 decks23 decks
47%synergy
Game Changers
Notion Thief
8.7%inclusion2 decks23 decks
1%synergy
Smothering Tithe
8.7%inclusion2 decks23 decks
-24%synergy
Gifts Ungiven
8.7%inclusion2 decks23 decks
6%synergy
Creatures
Victor, Valgavoth's Seneschal
48%inclusion11 decks23 decks
46%synergy
Entity Tracker
48%inclusion11 decks23 decks
41%synergy
Soaring Lightbringer
48%inclusion11 decks23 decks
43%synergy
Overlord of the Floodpits
43%inclusion10 decks23 decks
40%synergy
Fear of Impostors
43%inclusion10 decks23 decks
42%synergy
Aminatou, Veil Piercer
39%inclusion9 decks23 decks
38%synergy
Ghostly Dancers
39%inclusion9 decks23 decks
36%synergy
Nightmare Shepherd
35%inclusion8 decks23 decks
32%synergy
Balemurk Leech
35%inclusion8 decks23 decks
34%synergy
Solemn Simulacrum
30%inclusion7 decks23 decks
15%synergy
Athreos, Shroud-Veiled
30%inclusion7 decks23 decks
26%synergy
Skullsnap Nuisance
26%inclusion6 decks23 decks
26%synergy
Grim Guardian
26%inclusion6 decks23 decks
23%synergy
Ancient Cellarspawn
26%inclusion6 decks23 decks
23%synergy
Zur, Eternal Schemer
26%inclusion6 decks23 decks
23%synergy
Zur the Enchanter
26%inclusion6 decks23 decks
21%synergy
Silent Hallcreeper
26%inclusion6 decks23 decks
22%synergy
Gremlin Tamer
26%inclusion6 decks23 decks
25%synergy
Burnished Hart
22%inclusion5 decks23 decks
18%synergy
Heliod, the Radiant Dawn
22%inclusion5 decks23 decks
18%synergy
Overlord of the Balemurk
22%inclusion5 decks23 decks
20%synergy
Phenomenon Investigators
17%inclusion4 decks23 decks
17%synergy
Auramancer
17%inclusion4 decks23 decks
14%synergy
Abdel Adrian, Gorion's Ward
17%inclusion4 decks23 decks
16%synergy
Mindwrack Harpy
17%inclusion4 decks23 decks
17%synergy
Verge Rangers
17%inclusion4 decks23 decks
16%synergy
Metamorphosis Fanatic
13%inclusion3 decks23 decks
8%synergy
Archon of Sun's Grace
13%inclusion3 decks23 decks
8%synergy
Optimistic Scavenger
13%inclusion3 decks23 decks
13%synergy
Enduring Curiosity
13%inclusion3 decks23 decks
6%synergy
Lotho, Corrupt Shirriff
8.7%inclusion2 decks23 decks
-8%synergy
Spirit of the Labyrinth
8.7%inclusion2 decks23 decks
8%synergy
Malevolent Hermit
8.7%inclusion2 decks23 decks
8%synergy
Hydroelectric Specimen
8.7%inclusion2 decks23 decks
6%synergy
Vega, the Watcher
8.7%inclusion2 decks23 decks
7%synergy
Spirited Companion
8.7%inclusion2 decks23 decks
7%synergy
Underworld Coinsmith
8.7%inclusion2 decks23 decks
8%synergy
Fear of Isolation
8.7%inclusion2 decks23 decks
8%synergy
Dream Eater
8.7%inclusion2 decks23 decks
8%synergy
Hedron Crab
8.7%inclusion2 decks23 decks
8%synergy
Overlord of the Mistmoors
8.7%inclusion2 decks23 decks
6%synergy
Arvinox, the Mind Flail
8.7%inclusion2 decks23 decks
7%synergy
Toxrill, the Corrosive
8.7%inclusion2 decks23 decks
6%synergy
Ketramose, the New Dawn
8.7%inclusion2 decks23 decks
8%synergy
Braids, Arisen Nightmare
8.7%inclusion2 decks23 decks
7%synergy
Ledger Shredder
8.7%inclusion2 decks23 decks
0%synergy
Fear of Lost Teeth
8.7%inclusion2 decks23 decks
8%synergy
Valgavoth's Faithful
8.7%inclusion2 decks23 decks
9%synergy
Laboratory Maniac
8.7%inclusion2 decks23 decks
5%synergy
Creeping Peeper
8.7%inclusion2 decks23 decks
8%synergy
Instants
Arcane Denial
52%inclusion12 decks23 decks
32%synergy
Otherworldly Gaze
43%inclusion10 decks23 decks
41%synergy
Thirst for Meaning
39%inclusion9 decks23 decks
38%synergy
Brainstorm
35%inclusion8 decks23 decks
17%synergy
Utter End
30%inclusion7 decks23 decks
23%synergy
Counterspell
26%inclusion6 decks23 decks
-15%synergy
Return to Dust
26%inclusion6 decks23 decks
22%synergy
Path to Exile
22%inclusion5 decks23 decks
-20%synergy
Telling Time
17%inclusion4 decks23 decks
15%synergy
Dovin's Veto
13%inclusion3 decks23 decks
-12%synergy
Frantic Search
8.7%inclusion2 decks23 decks
-8%synergy
An Offer You Can't Refuse
8.7%inclusion2 decks23 decks
-18%synergy
Dark Ritual
8.7%inclusion2 decks23 decks
-10%synergy
Dispel
8.7%inclusion2 decks23 decks
5%synergy
Opt
8.7%inclusion2 decks23 decks
5%synergy
Spell Pierce
8.7%inclusion2 decks23 decks
6%synergy
Lim-Dûl's Vault
8.7%inclusion2 decks23 decks
5%synergy
Delay
8.7%inclusion2 decks23 decks
6%synergy
Mana Leak
8.7%inclusion2 decks23 decks
7%synergy
Heliod's Intervention
8.7%inclusion2 decks23 decks
7%synergy
Sorceries
Redress Fate
48%inclusion11 decks23 decks
41%synergy
Time Wipe
30%inclusion7 decks23 decks
23%synergy
Read the Bones
30%inclusion7 decks23 decks
26%synergy
Terminus
26%inclusion6 decks23 decks
22%synergy
Sevinne's Reclamation
26%inclusion6 decks23 decks
17%synergy
Ponder
22%inclusion5 decks23 decks
12%synergy
Extinguish All Hope
22%inclusion5 decks23 decks
20%synergy
Lively Dirge
17%inclusion4 decks23 decks
16%synergy
Diabolic Vision
17%inclusion4 decks23 decks
15%synergy
Portent
17%inclusion4 decks23 decks
14%synergy
Entreat the Angels
17%inclusion4 decks23 decks
15%synergy
Singularity Rupture
15%inclusion2 decks13 decks
13%synergy
Windfall
13%inclusion3 decks23 decks
-1%synergy
Aminatou's Augury
13%inclusion3 decks23 decks
12%synergy
Dance of the Manse
8.7%inclusion2 decks23 decks
5%synergy
Farewell
8.7%inclusion2 decks23 decks
-4%synergy
Ringsight
8.7%inclusion2 decks23 decks
7%synergy
Commune with Evil
8.7%inclusion2 decks23 decks
9%synergy
Unmarked Grave
8.7%inclusion2 decks23 decks
7%synergy
Demonic Counsel
8.7%inclusion2 decks23 decks
8%synergy
Utility Artifacts
Keys to the House
13%inclusion3 decks23 decks
13%synergy
Cloud Key
13%inclusion3 decks23 decks
10%synergy
Soul-Guide Lantern
8.7%inclusion2 decks23 decks
8%synergy
Wayfarer's Bauble
8.7%inclusion2 decks23 decks
0%synergy
Wishclaw Talisman
8.7%inclusion2 decks23 decks
0%synergy
Brainstone
8.7%inclusion2 decks23 decks
7%synergy
Enchantments
Shark Typhoon
48%inclusion11 decks23 decks
42%synergy
Monologue Tax
43%inclusion10 decks23 decks
37%synergy
Cramped Vents // Access Maze
39%inclusion9 decks23 decks
36%synergy
Bottomless Pool // Locker Room
39%inclusion9 decks23 decks
37%synergy
Animate Dead
39%inclusion9 decks23 decks
29%synergy
One with the Multiverse
39%inclusion9 decks23 decks
34%synergy
Ripples of Undeath
35%inclusion8 decks23 decks
32%synergy
Dress Down
35%inclusion8 decks23 decks
32%synergy
Seal of Cleansing
35%inclusion8 decks23 decks
33%synergy
Cast Out
35%inclusion8 decks23 decks
32%synergy
Estrid's Invocation
30%inclusion7 decks23 decks
26%synergy
Cemetery Tampering
30%inclusion7 decks23 decks
30%synergy
The Eldest Reborn
30%inclusion7 decks23 decks
28%synergy
Amphibian Downpour
26%inclusion6 decks23 decks
22%synergy
Defiled Crypt // Cadaver Lab
26%inclusion6 decks23 decks
25%synergy
Unable to Scream
22%inclusion5 decks23 decks
21%synergy
Meat Locker // Drowned Diner
22%inclusion5 decks23 decks
21%synergy
Secrets of the Dead
22%inclusion5 decks23 decks
21%synergy
Seal of Removal
22%inclusion5 decks23 decks
21%synergy
Restricted Office // Lecture Hall
22%inclusion5 decks23 decks
19%synergy
Nowhere to Run
22%inclusion5 decks23 decks
21%synergy
Ethereal Armor
22%inclusion5 decks23 decks
17%synergy
Mirror Room // Fractured Realm
22%inclusion5 decks23 decks
19%synergy
Necromancy
22%inclusion5 decks23 decks
17%synergy
Sheltered by Ghosts
22%inclusion5 decks23 decks
19%synergy
Propaganda
22%inclusion5 decks23 decks
-4%synergy
Grasp of Fate
17%inclusion4 decks23 decks
11%synergy
Cacophony Unleashed
17%inclusion4 decks23 decks
16%synergy
Derelict Attic // Widow's Walk
17%inclusion4 decks23 decks
17%synergy
Witness Protection
17%inclusion4 decks23 decks
15%synergy
Polluted Cistern // Dim Oubliette
17%inclusion4 decks23 decks
17%synergy
Central Elevator // Promising Stairs
17%inclusion4 decks23 decks
17%synergy
Spirit-Sister's Call
13%inclusion3 decks23 decks
12%synergy
Mystic Remora
13%inclusion3 decks23 decks
-9%synergy
All That Glitters
13%inclusion3 decks23 decks
4%synergy
Curator's Ward
13%inclusion3 decks23 decks
10%synergy
Founding the Third Path
13%inclusion3 decks23 decks
13%synergy
Touch the Spirit Realm
13%inclusion3 decks23 decks
10%synergy
Dazzling Theater // Prop Room
13%inclusion3 decks23 decks
11%synergy
Enchanted Evening
13%inclusion3 decks23 decks
11%synergy
Aura of Silence
13%inclusion3 decks23 decks
10%synergy
Trapped in the Screen
13%inclusion3 decks23 decks
12%synergy
Soul Snare
13%inclusion3 decks23 decks
13%synergy
Blind Obedience
13%inclusion3 decks23 decks
1%synergy
Surgical Suite // Hospital Room
13%inclusion3 decks23 decks
13%synergy
Ghostly Prison
13%inclusion3 decks23 decks
-8%synergy
Phyrexian Arena
13%inclusion3 decks23 decks
-1%synergy
Stillness in Motion
11%inclusion2 decks18 decks
11%synergy
Curiosity
8.7%inclusion2 decks23 decks
1%synergy
Ordeal of Thassa
8.7%inclusion2 decks23 decks
8%synergy
Utility Lands
Bojuka Bog
65%inclusion15 decks23 decks
38%synergy
Halimar Depths
48%inclusion11 decks23 decks
43%synergy
Reliquary Tower
8.7%inclusion2 decks23 decks
-25%synergy
Cephalid Coliseum
8.7%inclusion2 decks23 decks
5%synergy
Monumental Henge
8.7%inclusion2 decks23 decks
7%synergy
Mana Artifacts
Arcane Signet
87%inclusion20 decks23 decks
-1%synergy
Sol Ring
87%inclusion20 decks23 decks
-3%synergy
Azorius Signet
70%inclusion16 decks23 decks
37%synergy
Orzhov Signet
65%inclusion15 decks23 decks
30%synergy
Mind Stone
43%inclusion10 decks23 decks
30%synergy
Commander's Sphere
35%inclusion8 decks23 decks
15%synergy
Talisman of Progress
26%inclusion6 decks23 decks
-16%synergy
Dimir Signet
26%inclusion6 decks23 decks
-7%synergy
Fellwar Stone
26%inclusion6 decks23 decks
-8%synergy
Talisman of Hierarchy
22%inclusion5 decks23 decks
-21%synergy
Talisman of Dominance
22%inclusion5 decks23 decks
-27%synergy
Lands
Swamp
100%inclusion23 decks23 decks
9%synergy
Plains
100%inclusion23 decks23 decks
9%synergy
Island
96%inclusion22 decks23 decks
3%synergy
Command Tower
96%inclusion22 decks23 decks
3%synergy
Caves of Koilos
83%inclusion19 decks23 decks
47%synergy
Underground River
83%inclusion19 decks23 decks
50%synergy
Adarkar Wastes
83%inclusion19 decks23 decks
52%synergy
Arcane Sanctum
78%inclusion18 decks23 decks
24%synergy
Orzhov Basilica
78%inclusion18 decks23 decks
62%synergy
Temple of Silence
78%inclusion18 decks23 decks
58%synergy
Azorius Chancery
74%inclusion17 decks23 decks
59%synergy
Terramorphic Expanse
74%inclusion17 decks23 decks
57%synergy
Temple of Enlightenment
74%inclusion17 decks23 decks
57%synergy
Tainted Isle
74%inclusion17 decks23 decks
68%synergy
Temple of Deceit
74%inclusion17 decks23 decks
55%synergy
Obscura Storefront
74%inclusion17 decks23 decks
63%synergy
Tainted Field
70%inclusion16 decks23 decks
63%synergy
Dimir Aqueduct
61%inclusion14 decks23 decks
47%synergy
Ash Barrens
61%inclusion14 decks23 decks
50%synergy
Evolving Wilds
61%inclusion14 decks23 decks
36%synergy
Thriving Isle
39%inclusion9 decks23 decks
34%synergy
Thriving Moor
39%inclusion9 decks23 decks
35%synergy
Thriving Heath
39%inclusion9 decks23 decks
35%synergy
Glacial Fortress
30%inclusion7 decks23 decks
-9%synergy
Exotic Orchard
30%inclusion7 decks23 decks
-28%synergy
Sunken Hollow
26%inclusion6 decks23 decks
-13%synergy
Prairie Stream
26%inclusion6 decks23 decks
-14%synergy
Darkwater Catacombs
22%inclusion5 decks23 decks
7%synergy
Skycloud Expanse
22%inclusion5 decks23 decks
7%synergy
Contaminated Landscape
17%inclusion4 decks23 decks
3%synergy
Isolated Chapel
17%inclusion4 decks23 decks
-20%synergy
Myriad Landscape
13%inclusion3 decks23 decks
4%synergy
River of Tears
13%inclusion3 decks23 decks
11%synergy
Drowned Catacomb
13%inclusion3 decks23 decks
-22%synergy
Glasswing Grace
8.7%inclusion2 decks23 decks
6%synergy
Hydroelectric Specimen
8.7%inclusion2 decks23 decks
6%synergy
Shattered Sanctum
8.7%inclusion2 decks23 decks
-7%synergy
Brightclimb Pathway
8.7%inclusion2 decks23 decks
2%synergy
Port Town
8.7%inclusion2 decks23 decks
-8%synergy
Path of Ancestry
8.7%inclusion2 decks23 decks
-19%synergy
Shineshadow Snarl
8.7%inclusion2 decks23 decks
-1%synergy
Fabled Passage
8.7%inclusion2 decks23 decks
1%synergy
Raffine's Tower
8.7%inclusion2 decks23 decks
-32%synergy
Promising Vein
8.7%inclusion2 decks23 decks
8%synergy
Dismal Backwater
8.7%inclusion2 decks23 decks
2%synergy
Choked Estuary
8.7%inclusion2 decks23 decks
-7%synergy
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