The Master of Keys (Commander) - Budget Optimized

The Master of Keys
Rank #304
28decks
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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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Mesa Enchantress
82%inclusion23 decks28 decks
73%synergy
Secret Arcade // Dusty Parlor
75%inclusion21 decks28 decks
70%synergy
Ondu Spiritdancer
75%inclusion21 decks28 decks
69%synergy
Inquisitive Glimmer
75%inclusion21 decks28 decks
68%synergy
Starfield Mystic
71%inclusion20 decks28 decks
65%synergy
Demon of Fate's Design
68%inclusion19 decks28 decks
62%synergy
Mirrormade
71%inclusion20 decks28 decks
62%synergy
Scrabbling Skullcrab
61%inclusion17 decks28 decks
60%synergy
Gravebreaker Lamia
57%inclusion16 decks28 decks
56%synergy
Fear of Impostors
57%inclusion16 decks28 decks
56%synergy
Top Cards
Swords to Plowshares
64%inclusion18 decks28 decks
-4%synergy
Entity Tracker
61%inclusion17 decks28 decks
55%synergy
Fear of Sleep Paralysis
57%inclusion16 decks28 decks
52%synergy
Doomwake Giant
57%inclusion16 decks28 decks
51%synergy
Sphere of Safety
54%inclusion15 decks28 decks
44%synergy
Sigil of the Empty Throne
50%inclusion14 decks28 decks
44%synergy
Ghostly Dancers
50%inclusion14 decks28 decks
47%synergy
Extravagant Replication
46%inclusion13 decks28 decks
41%synergy
Timely Ward
46%inclusion13 decks28 decks
41%synergy
Victor, Valgavoth's Seneschal
46%inclusion13 decks28 decks
44%synergy
Game Changers
Notion Thief
14%inclusion4 decks28 decks
7%synergy
Gifts Ungiven
14%inclusion4 decks28 decks
12%synergy
Farewell
7.1%inclusion2 decks28 decks
-6%synergy
Creatures
Moon-Blessed Cleric
46%inclusion13 decks28 decks
42%synergy
Soaring Lightbringer
43%inclusion12 decks28 decks
38%synergy
Archetype of Imagination
43%inclusion12 decks28 decks
38%synergy
Overlord of the Floodpits
39%inclusion11 decks28 decks
36%synergy
Gremlin Tamer
39%inclusion11 decks28 decks
38%synergy
Aminatou, Veil Piercer
36%inclusion10 decks28 decks
34%synergy
Grim Guardian
32%inclusion9 decks28 decks
30%synergy
Solemn Simulacrum
29%inclusion8 decks28 decks
15%synergy
Zur, Eternal Schemer
29%inclusion8 decks28 decks
25%synergy
Silent Hallcreeper
29%inclusion8 decks28 decks
24%synergy
Skullsnap Nuisance
29%inclusion8 decks28 decks
28%synergy
Zur the Enchanter
29%inclusion8 decks28 decks
23%synergy
Athreos, Shroud-Veiled
25%inclusion7 decks28 decks
21%synergy
Enduring Curiosity
21%inclusion6 decks28 decks
13%synergy
Overlord of the Balemurk
21%inclusion6 decks28 decks
20%synergy
Abdel Adrian, Gorion's Ward
21%inclusion6 decks28 decks
20%synergy
Archon of Sun's Grace
21%inclusion6 decks28 decks
17%synergy
Balemurk Leech
21%inclusion6 decks28 decks
21%synergy
Nightmare Shepherd
21%inclusion6 decks28 decks
19%synergy
Heliod, the Radiant Dawn
21%inclusion6 decks28 decks
18%synergy
Auramancer
18%inclusion5 decks28 decks
15%synergy
Mindwrack Harpy
18%inclusion5 decks28 decks
18%synergy
Sage of Mysteries
18%inclusion5 decks28 decks
18%synergy
Ancient Cellarspawn
18%inclusion5 decks28 decks
15%synergy
Hedron Crab
18%inclusion5 decks28 decks
17%synergy
Creeping Peeper
18%inclusion5 decks28 decks
18%synergy
Phenomenon Investigators
18%inclusion5 decks28 decks
17%synergy
Malevolent Hermit
14%inclusion4 decks28 decks
14%synergy
Optimistic Scavenger
14%inclusion4 decks28 decks
14%synergy
Burnished Hart
14%inclusion4 decks28 decks
11%synergy
Leonin Relic-Warder
14%inclusion4 decks28 decks
14%synergy
Spirited Companion
14%inclusion4 decks28 decks
12%synergy
Ghostly Pilferer
14%inclusion4 decks28 decks
7%synergy
Laboratory Maniac
14%inclusion4 decks28 decks
11%synergy
Metamorphosis Fanatic
11%inclusion3 decks28 decks
6%synergy
Fear of Isolation
11%inclusion3 decks28 decks
10%synergy
Hydroelectric Specimen
11%inclusion3 decks28 decks
8%synergy
Underworld Coinsmith
11%inclusion3 decks28 decks
10%synergy
Fear of Infinity
11%inclusion3 decks28 decks
10%synergy
Protean Thaumaturge
11%inclusion3 decks28 decks
10%synergy
Lurrus of the Dream-Den
11%inclusion3 decks28 decks
9%synergy
Overlord of the Mistmoors
11%inclusion3 decks28 decks
9%synergy
Nashi, Searcher in the Dark
11%inclusion3 decks28 decks
10%synergy
Verge Rangers
11%inclusion3 decks28 decks
10%synergy
Braids, Arisen Nightmare
11%inclusion3 decks28 decks
10%synergy
Emet-Selch of the Third Seat
8.7%inclusion2 decks23 decks
-1%synergy
Spirit of the Labyrinth
7.1%inclusion2 decks28 decks
6%synergy
Ashiok's Reaper
7.1%inclusion2 decks28 decks
7%synergy
Valgavoth's Faithful
7.1%inclusion2 decks28 decks
7%synergy
Unwilling Vessel
7.1%inclusion2 decks28 decks
7%synergy
Instants
Arcane Denial
46%inclusion13 decks28 decks
26%synergy
Inkshield
36%inclusion10 decks28 decks
26%synergy
Thirst for Meaning
36%inclusion10 decks28 decks
34%synergy
Counterspell
32%inclusion9 decks28 decks
-9%synergy
Otherworldly Gaze
32%inclusion9 decks28 decks
30%synergy
Utter End
29%inclusion8 decks28 decks
22%synergy
Brainstorm
25%inclusion7 decks28 decks
8%synergy
Frantic Search
21%inclusion6 decks28 decks
4%synergy
Dovin's Veto
18%inclusion5 decks28 decks
-8%synergy
An Offer You Can't Refuse
18%inclusion5 decks28 decks
-9%synergy
Telling Time
14%inclusion4 decks28 decks
12%synergy
Delay
14%inclusion4 decks28 decks
12%synergy
Dark Ritual
14%inclusion4 decks28 decks
-5%synergy
Return to Dust
14%inclusion4 decks28 decks
11%synergy
Path to Exile
14%inclusion4 decks28 decks
-28%synergy
Fact or Fiction
11%inclusion3 decks28 decks
7%synergy
Darkblast
11%inclusion3 decks28 decks
11%synergy
Muddle the Mixture
11%inclusion3 decks28 decks
7%synergy
Opt
11%inclusion3 decks28 decks
7%synergy
Get Out
11%inclusion3 decks28 decks
10%synergy
No More Lies
11%inclusion3 decks28 decks
9%synergy
Shred Memory
11%inclusion3 decks28 decks
10%synergy
Lim-Dûl's Vault
11%inclusion3 decks28 decks
7%synergy
Mana Leak
11%inclusion3 decks28 decks
9%synergy
Negate
7.1%inclusion2 decks28 decks
-9%synergy
Dispel
7.1%inclusion2 decks28 decks
4%synergy
Soul Partition
7.1%inclusion2 decks28 decks
7%synergy
Consider
7.1%inclusion2 decks28 decks
5%synergy
Unwanted Remake
7.1%inclusion2 decks28 decks
7%synergy
Spell Pierce
7.1%inclusion2 decks28 decks
5%synergy
Waterlogged Teachings
7.1%inclusion2 decks28 decks
3%synergy
Long River's Pull
7.1%inclusion2 decks28 decks
6%synergy
Refute
7.1%inclusion2 decks28 decks
5%synergy
Sorceries
Redress Fate
43%inclusion12 decks28 decks
37%synergy
Sevinne's Reclamation
36%inclusion10 decks28 decks
27%synergy
Extinguish All Hope
25%inclusion7 decks28 decks
23%synergy
Time Wipe
21%inclusion6 decks28 decks
15%synergy
Lively Dirge
21%inclusion6 decks28 decks
20%synergy
Terminus
18%inclusion5 decks28 decks
14%synergy
Read the Bones
18%inclusion5 decks28 decks
14%synergy
Ponder
14%inclusion4 decks28 decks
5%synergy
Unmarked Grave
14%inclusion4 decks28 decks
13%synergy
Demonic Counsel
14%inclusion4 decks28 decks
13%synergy
Portent
14%inclusion4 decks28 decks
11%synergy
Damn
11%inclusion3 decks28 decks
-10%synergy
Entreat the Angels
11%inclusion3 decks28 decks
9%synergy
Windfall
11%inclusion3 decks28 decks
-3%synergy
Resurgent Belief
11%inclusion3 decks28 decks
9%synergy
Diabolic Vision
11%inclusion3 decks28 decks
8%synergy
Buried Alive
11%inclusion3 decks28 decks
7%synergy
Singularity Rupture
11%inclusion2 decks19 decks
8%synergy
Unearth
7.1%inclusion2 decks28 decks
5%synergy
Ringsight
7.1%inclusion2 decks28 decks
6%synergy
Whispering Madness
7.1%inclusion2 decks28 decks
6%synergy
Final Parting
7.1%inclusion2 decks28 decks
7%synergy
Solve the Equation
7.1%inclusion2 decks28 decks
6%synergy
Commune with Evil
7.1%inclusion2 decks28 decks
7%synergy
Insatiable Avarice
7.1%inclusion2 decks28 decks
6%synergy
Traumatize
7.1%inclusion2 decks28 decks
7%synergy
Glimpse the Unthinkable
7.1%inclusion2 decks28 decks
7%synergy
Reanimate
7.1%inclusion2 decks28 decks
-9%synergy
Aminatou's Augury
7.1%inclusion2 decks28 decks
6%synergy
Dance of the Manse
7.1%inclusion2 decks28 decks
4%synergy
Utility Artifacts
Keys to the House
25%inclusion7 decks28 decks
25%synergy
Wishclaw Talisman
14%inclusion4 decks28 decks
6%synergy
Cloud Key
11%inclusion3 decks28 decks
7%synergy
The Everflowing Well
7.1%inclusion2 decks28 decks
7%synergy
Wayfarer's Bauble
7.1%inclusion2 decks28 decks
-1%synergy
Brainstone
7.1%inclusion2 decks28 decks
6%synergy
Enchantments
Bottomless Pool // Locker Room
43%inclusion12 decks28 decks
41%synergy
Dress Down
43%inclusion12 decks28 decks
41%synergy
Ripples of Undeath
39%inclusion11 decks28 decks
37%synergy
Animate Dead
39%inclusion11 decks28 decks
30%synergy
Monologue Tax
36%inclusion10 decks28 decks
29%synergy
Shark Typhoon
32%inclusion9 decks28 decks
26%synergy
Cemetery Tampering
32%inclusion9 decks28 decks
31%synergy
Seal of Cleansing
32%inclusion9 decks28 decks
31%synergy
Defiled Crypt // Cadaver Lab
32%inclusion9 decks28 decks
31%synergy
Central Elevator // Promising Stairs
32%inclusion9 decks28 decks
32%synergy
Ethereal Armor
32%inclusion9 decks28 decks
27%synergy
One with the Multiverse
29%inclusion8 decks28 decks
24%synergy
Cramped Vents // Access Maze
29%inclusion8 decks28 decks
26%synergy
Restricted Office // Lecture Hall
29%inclusion8 decks28 decks
26%synergy
Mirror Room // Fractured Realm
29%inclusion8 decks28 decks
26%synergy
Cast Out
29%inclusion8 decks28 decks
26%synergy
The Eldest Reborn
25%inclusion7 decks28 decks
23%synergy
Unable to Scream
25%inclusion7 decks28 decks
24%synergy
Meat Locker // Drowned Diner
25%inclusion7 decks28 decks
24%synergy
Amphibian Downpour
25%inclusion7 decks28 decks
20%synergy
Polluted Cistern // Dim Oubliette
25%inclusion7 decks28 decks
24%synergy
Seal of Removal
25%inclusion7 decks28 decks
24%synergy
Dazzling Theater // Prop Room
21%inclusion6 decks28 decks
20%synergy
Hallowed Haunting
21%inclusion6 decks28 decks
19%synergy
Grasp of Fate
21%inclusion6 decks28 decks
15%synergy
Sheltered by Ghosts
21%inclusion6 decks28 decks
19%synergy
Propaganda
21%inclusion6 decks28 decks
-6%synergy
Surgical Suite // Hospital Room
21%inclusion6 decks28 decks
21%synergy
Stillness in Motion
21%inclusion5 decks24 decks
20%synergy
Founding the Third Path
18%inclusion5 decks28 decks
18%synergy
Cacophony Unleashed
18%inclusion5 decks28 decks
16%synergy
Touch the Spirit Realm
18%inclusion5 decks28 decks
15%synergy
Witness Protection
18%inclusion5 decks28 decks
16%synergy
Secrets of the Dead
18%inclusion5 decks28 decks
18%synergy
Estrid's Invocation
18%inclusion5 decks28 decks
13%synergy
Necromancy
18%inclusion5 decks28 decks
13%synergy
Derelict Attic // Widow's Walk
18%inclusion5 decks28 decks
17%synergy
Nowhere to Run
18%inclusion5 decks28 decks
17%synergy
Tinybones Joins Up
14%inclusion4 decks28 decks
13%synergy
Blind Obedience
14%inclusion4 decks28 decks
2%synergy
All That Glitters
14%inclusion4 decks28 decks
6%synergy
Mystic Remora
14%inclusion4 decks28 decks
-7%synergy
The Tale of Tamiyo
14%inclusion4 decks28 decks
14%synergy
Unholy Annex // Ritual Chamber
14%inclusion4 decks28 decks
14%synergy
Enchanted Evening
14%inclusion4 decks28 decks
13%synergy
Aura of Silence
14%inclusion4 decks28 decks
11%synergy
Static Prison
14%inclusion4 decks28 decks
14%synergy
Ghostly Prison
14%inclusion4 decks28 decks
-8%synergy
Phyrexian Arena
11%inclusion3 decks28 decks
-3%synergy
Soul Snare
11%inclusion3 decks28 decks
10%synergy
Battles
Invasion of Theros
7.1%inclusion2 decks28 decks
5%synergy
Utility Lands
Hall of Heliod's Generosity
61%inclusion17 decks28 decks
48%synergy
Bojuka Bog
46%inclusion13 decks28 decks
19%synergy
Halimar Depths
36%inclusion10 decks28 decks
31%synergy
Cephalid Coliseum
14%inclusion4 decks28 decks
11%synergy
Nephalia Drownyard
7.1%inclusion2 decks28 decks
7%synergy
Reliquary Tower
7.1%inclusion2 decks28 decks
-27%synergy
Mana Artifacts
Arcane Signet
89%inclusion25 decks28 decks
1%synergy
Sol Ring
89%inclusion25 decks28 decks
-1%synergy
Azorius Signet
61%inclusion17 decks28 decks
30%synergy
Orzhov Signet
57%inclusion16 decks28 decks
24%synergy
Fellwar Stone
32%inclusion9 decks28 decks
-1%synergy
Commander's Sphere
32%inclusion9 decks28 decks
14%synergy
Mind Stone
32%inclusion9 decks28 decks
20%synergy
Dimir Signet
25%inclusion7 decks28 decks
-6%synergy
Talisman of Hierarchy
25%inclusion7 decks28 decks
-19%synergy
Talisman of Progress
25%inclusion7 decks28 decks
-19%synergy
Talisman of Dominance
21%inclusion6 decks28 decks
-28%synergy
Bender's Waterskin
5.3%inclusion1 decks19 decks
0%synergy
Lands
Island
100%inclusion28 decks28 decks
7%synergy
Plains
100%inclusion28 decks28 decks
8%synergy
Swamp
100%inclusion28 decks28 decks
8%synergy
Command Tower
89%inclusion25 decks28 decks
-3%synergy
Caves of Koilos
79%inclusion22 decks28 decks
43%synergy
Underground River
71%inclusion20 decks28 decks
38%synergy
Adarkar Wastes
71%inclusion20 decks28 decks
40%synergy
Arcane Sanctum
68%inclusion19 decks28 decks
13%synergy
Terramorphic Expanse
61%inclusion17 decks28 decks
45%synergy
Orzhov Basilica
61%inclusion17 decks28 decks
45%synergy
Temple of Silence
61%inclusion17 decks28 decks
42%synergy
Obscura Storefront
61%inclusion17 decks28 decks
51%synergy
Evolving Wilds
57%inclusion16 decks28 decks
32%synergy
Temple of Deceit
57%inclusion16 decks28 decks
40%synergy
Azorius Chancery
57%inclusion16 decks28 decks
43%synergy
Tainted Isle
54%inclusion15 decks28 decks
47%synergy
Tainted Field
54%inclusion15 decks28 decks
47%synergy
Temple of Enlightenment
54%inclusion15 decks28 decks
37%synergy
Dimir Aqueduct
54%inclusion15 decks28 decks
40%synergy
Ash Barrens
43%inclusion12 decks28 decks
32%synergy
Exotic Orchard
36%inclusion10 decks28 decks
-23%synergy
Glacial Fortress
36%inclusion10 decks28 decks
-6%synergy
Thriving Isle
36%inclusion10 decks28 decks
31%synergy
Thriving Moor
36%inclusion10 decks28 decks
31%synergy
Thriving Heath
36%inclusion10 decks28 decks
31%synergy
Isolated Chapel
32%inclusion9 decks28 decks
-8%synergy
Prairie Stream
29%inclusion8 decks28 decks
-12%synergy
Sunken Hollow
29%inclusion8 decks28 decks
-11%synergy
Contaminated Landscape
21%inclusion6 decks28 decks
7%synergy
Skycloud Expanse
21%inclusion6 decks28 decks
6%synergy
Darkwater Catacombs
18%inclusion5 decks28 decks
3%synergy
River of Tears
18%inclusion5 decks28 decks
16%synergy
Drowned Catacomb
18%inclusion5 decks28 decks
-19%synergy
Hydroelectric Specimen
11%inclusion3 decks28 decks
8%synergy
Dismal Backwater
11%inclusion3 decks28 decks
5%synergy
Floodfarm Verge
11%inclusion3 decks28 decks
0%synergy
Valgavoth's Lair
11%inclusion3 decks28 decks
8%synergy
Myriad Landscape
7.1%inclusion2 decks28 decks
-1%synergy
Fetid Heath
7.1%inclusion2 decks28 decks
-5%synergy
Choked Estuary
7.1%inclusion2 decks28 decks
-9%synergy
Tranquil Cove
7.1%inclusion2 decks28 decks
1%synergy
Raffine's Tower
7.1%inclusion2 decks28 decks
-34%synergy
Promising Vein
7.1%inclusion2 decks28 decks
7%synergy
Waterlogged Teachings
7.1%inclusion2 decks28 decks
3%synergy
Undercity Sewers
7.1%inclusion2 decks28 decks
-7%synergy
Abandoned Campground
7.1%inclusion2 decks28 decks
7%synergy
Dimir Guildgate
7.1%inclusion2 decks28 decks
5%synergy
Spire of Industry
7.1%inclusion2 decks28 decks
-1%synergy
Shineshadow Snarl
7.1%inclusion2 decks28 decks
-4%synergy
Scoured Barrens
7.1%inclusion2 decks28 decks
1%synergy
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