The Master of Keys (Commander) - Budget Upgraded

The Master of Keys
Rank #306
44decks
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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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Battles
Utility Lands
Mana Artifacts
Lands
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Twilight Diviner
11%inclusion1 decks9 decks
10%synergy
Mornsong Aria
11%inclusion1 decks9 decks
11%synergy
High Synergy Cards
Inquisitive Glimmer
68%inclusion30 decks44 decks
61%synergy
Starfield Mystic
66%inclusion29 decks44 decks
59%synergy
Mesa Enchantress
66%inclusion29 decks44 decks
57%synergy
Fear of Sleep Paralysis
61%inclusion27 decks44 decks
56%synergy
Doomwake Giant
61%inclusion27 decks44 decks
55%synergy
Demon of Fate's Design
57%inclusion25 decks44 decks
51%synergy
Entity Tracker
57%inclusion25 decks44 decks
50%synergy
Gravebreaker Lamia
48%inclusion21 decks44 decks
47%synergy
Secret Arcade // Dusty Parlor
50%inclusion22 decks44 decks
45%synergy
Cemetery Tampering
45%inclusion20 decks44 decks
45%synergy
Top Cards
Sphere of Safety
50%inclusion22 decks44 decks
41%synergy
Sigil of the Empty Throne
48%inclusion21 decks44 decks
42%synergy
Scrabbling Skullcrab
45%inclusion20 decks44 decks
44%synergy
Mirrormade
43%inclusion19 decks44 decks
33%synergy
Victor, Valgavoth's Seneschal
41%inclusion18 decks44 decks
39%synergy
Ghostly Dancers
41%inclusion18 decks44 decks
38%synergy
Fear of Impostors
41%inclusion18 decks44 decks
39%synergy
Moon-Blessed Cleric
41%inclusion18 decks44 decks
36%synergy
Seal of Cleansing
41%inclusion18 decks44 decks
39%synergy
Swords to Plowshares
41%inclusion18 decks44 decks
-27%synergy
Creatures
Ondu Spiritdancer
39%inclusion17 decks44 decks
32%synergy
Silent Hallcreeper
30%inclusion13 decks44 decks
25%synergy
Zur the Enchanter
30%inclusion13 decks44 decks
24%synergy
Aminatou, Veil Piercer
30%inclusion13 decks44 decks
28%synergy
Soaring Lightbringer
27%inclusion12 decks44 decks
22%synergy
Archon of Sun's Grace
25%inclusion11 decks44 decks
20%synergy
Archetype of Imagination
25%inclusion11 decks44 decks
20%synergy
Alseid of Life's Bounty
23%inclusion10 decks44 decks
21%synergy
Zur, Eternal Schemer
23%inclusion10 decks44 decks
20%synergy
Athreos, Shroud-Veiled
23%inclusion10 decks44 decks
18%synergy
Grim Guardian
20%inclusion9 decks44 decks
18%synergy
Mindwrack Harpy
20%inclusion9 decks44 decks
20%synergy
Gremlin Tamer
20%inclusion9 decks44 decks
19%synergy
Sage of Mysteries
18%inclusion8 decks44 decks
18%synergy
Overlord of the Floodpits
18%inclusion8 decks44 decks
14%synergy
Balemurk Leech
18%inclusion8 decks44 decks
17%synergy
Deranged Assistant
16%inclusion7 decks44 decks
16%synergy
Fear of Infinity
16%inclusion7 decks44 decks
15%synergy
Skullsnap Nuisance
16%inclusion7 decks44 decks
15%synergy
Ancient Cellarspawn
16%inclusion7 decks44 decks
13%synergy
Millikin
16%inclusion7 decks44 decks
15%synergy
Solemn Simulacrum
14%inclusion6 decks44 decks
-1%synergy
Stitcher's Supplier
14%inclusion6 decks44 decks
13%synergy
Metamorphosis Fanatic
11%inclusion5 decks44 decks
7%synergy
Ghostly Keybearer
11%inclusion5 decks44 decks
11%synergy
Stenn, Paranoid Partisan
11%inclusion5 decks44 decks
10%synergy
Fear of Isolation
11%inclusion5 decks44 decks
11%synergy
Auramancer
11%inclusion5 decks44 decks
8%synergy
Verge Rangers
11%inclusion5 decks44 decks
10%synergy
Heliod, the Radiant Dawn
11%inclusion5 decks44 decks
8%synergy
Starnheim Courser
9.1%inclusion4 decks44 decks
5%synergy
Agent of Erebos
9.1%inclusion4 decks44 decks
9%synergy
Overlord of the Balemurk
9.1%inclusion4 decks44 decks
7%synergy
Spirited Companion
9.1%inclusion4 decks44 decks
7%synergy
Enduring Curiosity
9.1%inclusion4 decks44 decks
1%synergy
Appendage Amalgam
9.1%inclusion4 decks44 decks
9%synergy
Sun Titan
9.1%inclusion4 decks44 decks
1%synergy
Phenomenon Investigators
9.1%inclusion4 decks44 decks
9%synergy
Stinkweed Imp
9.1%inclusion4 decks44 decks
9%synergy
Optimistic Scavenger
9.1%inclusion4 decks44 decks
9%synergy
Fear of Surveillance
9.1%inclusion4 decks44 decks
9%synergy
Burnished Hart
9.1%inclusion4 decks44 decks
6%synergy
Creeping Peeper
9.1%inclusion4 decks44 decks
9%synergy
Nashi, Searcher in the Dark
9.1%inclusion4 decks44 decks
9%synergy
Sram, Senior Edificer
6.8%inclusion3 decks44 decks
2%synergy
Overlord of the Mistmoors
6.8%inclusion3 decks44 decks
5%synergy
Enduring Innocence
6.8%inclusion3 decks44 decks
5%synergy
Unwilling Vessel
6.8%inclusion3 decks44 decks
7%synergy
Dream Eater
6.8%inclusion3 decks44 decks
6%synergy
Enduring Tenacity
6.8%inclusion3 decks44 decks
-1%synergy
Instants
Arcane Denial
25%inclusion11 decks44 decks
5%synergy
Counterspell
25%inclusion11 decks44 decks
-16%synergy
Thirst for Meaning
23%inclusion10 decks44 decks
21%synergy
Otherworldly Gaze
23%inclusion10 decks44 decks
21%synergy
Frantic Search
20%inclusion9 decks44 decks
3%synergy
Path to Exile
20%inclusion9 decks44 decks
-22%synergy
Inkshield
20%inclusion9 decks44 decks
11%synergy
Brainstorm
18%inclusion8 decks44 decks
1%synergy
Utter End
16%inclusion7 decks44 decks
9%synergy
Void Rend
14%inclusion6 decks44 decks
-20%synergy
Negate
14%inclusion6 decks44 decks
-3%synergy
Get Out
11%inclusion5 decks44 decks
11%synergy
Return to Dust
11%inclusion5 decks44 decks
8%synergy
Fact or Fiction
11%inclusion5 decks44 decks
8%synergy
Telling Time
6.8%inclusion3 decks44 decks
5%synergy
Sublime Epiphany
6.8%inclusion3 decks44 decks
4%synergy
Stroke of Midnight
6.8%inclusion3 decks44 decks
-1%synergy
Murder
6.8%inclusion3 decks44 decks
5%synergy
Dovin's Veto
6.8%inclusion3 decks44 decks
-18%synergy
Confounding Riddle
6.8%inclusion3 decks44 decks
7%synergy
Twist Reality
6.8%inclusion3 decks44 decks
7%synergy
Reality Shift
6.8%inclusion3 decks44 decks
5%synergy
Don't Make a Sound
6.8%inclusion3 decks44 decks
6%synergy
Sorceries
Redress Fate
39%inclusion17 decks44 decks
33%synergy
Sevinne's Reclamation
36%inclusion16 decks44 decks
27%synergy
Extinguish All Hope
27%inclusion12 decks44 decks
26%synergy
Time Wipe
23%inclusion10 decks44 decks
16%synergy
Dance of the Manse
16%inclusion7 decks44 decks
12%synergy
Singularity Rupture
15%inclusion4 decks27 decks
12%synergy
Read the Bones
14%inclusion6 decks44 decks
9%synergy
Resurgent Belief
14%inclusion6 decks44 decks
12%synergy
Ponder
11%inclusion5 decks44 decks
2%synergy
Open the Vaults
11%inclusion5 decks44 decks
10%synergy
Buried Alive
11%inclusion5 decks44 decks
7%synergy
Brilliant Restoration
11%inclusion5 decks44 decks
9%synergy
Demonic Counsel
9.1%inclusion4 decks44 decks
8%synergy
Terminus
9.1%inclusion4 decks44 decks
5%synergy
Glimpse the Unthinkable
9.1%inclusion4 decks44 decks
9%synergy
Diabolic Vision
9.1%inclusion4 decks44 decks
7%synergy
Aminatou's Augury
9.1%inclusion4 decks44 decks
8%synergy
Winds of Rath
6.8%inclusion3 decks44 decks
4%synergy
Final Vengeance
6.8%inclusion3 decks44 decks
7%synergy
Back for Seconds
6.8%inclusion3 decks44 decks
7%synergy
Traumatize
6.8%inclusion3 decks44 decks
6%synergy
Avatar's Wrath
5.6%inclusion1 decks18 decks
3%synergy
Day of Black Sun
5.6%inclusion1 decks18 decks
5%synergy
Utility Artifacts
Keys to the House
18%inclusion8 decks44 decks
18%synergy
Cloud Key
14%inclusion6 decks44 decks
10%synergy
Wayfarer's Bauble
9.1%inclusion4 decks44 decks
1%synergy
Whip of Erebos
9.1%inclusion4 decks44 decks
7%synergy
Perpetual Timepiece
6.8%inclusion3 decks44 decks
6%synergy
The Fire Nation Drill
5.6%inclusion1 decks18 decks
5%synergy
Enchantments
All That Glitters
34%inclusion15 decks44 decks
25%synergy
Grasp of Fate
34%inclusion15 decks44 decks
28%synergy
Ripples of Undeath
34%inclusion15 decks44 decks
31%synergy
Bottomless Pool // Locker Room
34%inclusion15 decks44 decks
32%synergy
Ethereal Armor
34%inclusion15 decks44 decks
29%synergy
Amphibian Downpour
32%inclusion14 decks44 decks
27%synergy
Central Elevator // Promising Stairs
32%inclusion14 decks44 decks
31%synergy
Restricted Office // Lecture Hall
30%inclusion13 decks44 decks
27%synergy
Defiled Crypt // Cadaver Lab
30%inclusion13 decks44 decks
29%synergy
Timely Ward
30%inclusion13 decks44 decks
25%synergy
The Eldest Reborn
27%inclusion12 decks44 decks
25%synergy
Dress Down
27%inclusion12 decks44 decks
25%synergy
Cacophony Unleashed
27%inclusion12 decks44 decks
26%synergy
The Tale of Tamiyo
27%inclusion12 decks44 decks
27%synergy
Cramped Vents // Access Maze
25%inclusion11 decks44 decks
22%synergy
Monologue Tax
25%inclusion11 decks44 decks
19%synergy
Seal of Removal
25%inclusion11 decks44 decks
24%synergy
One with the Multiverse
25%inclusion11 decks44 decks
20%synergy
Stillness in Motion
23%inclusion9 decks39 decks
23%synergy
Extravagant Replication
23%inclusion10 decks44 decks
18%synergy
Surgical Suite // Hospital Room
20%inclusion9 decks44 decks
20%synergy
Secrets of the Dead
20%inclusion9 decks44 decks
20%synergy
Estrid's Invocation
20%inclusion9 decks44 decks
16%synergy
Meat Locker // Drowned Diner
20%inclusion9 decks44 decks
20%synergy
Derelict Attic // Widow's Walk
20%inclusion9 decks44 decks
20%synergy
Search for Azcanta
20%inclusion9 decks44 decks
19%synergy
Cast Out
20%inclusion9 decks44 decks
18%synergy
Shark Typhoon
18%inclusion8 decks44 decks
12%synergy
Propaganda
18%inclusion8 decks44 decks
-9%synergy
Imprisoned in the Moon
18%inclusion8 decks44 decks
12%synergy
Polluted Cistern // Dim Oubliette
18%inclusion8 decks44 decks
18%synergy
Nowhere to Run
18%inclusion8 decks44 decks
17%synergy
Copy Enchantment
16%inclusion7 decks44 decks
11%synergy
Animate Dead
16%inclusion7 decks44 decks
6%synergy
Soul Snare
16%inclusion7 decks44 decks
16%synergy
Utter Insignificance
16%inclusion7 decks44 decks
15%synergy
Unholy Annex // Ritual Chamber
16%inclusion7 decks44 decks
15%synergy
Dazzling Theater // Prop Room
16%inclusion7 decks44 decks
14%synergy
Darksteel Mutation
14%inclusion6 decks44 decks
7%synergy
Chronic Flooding
14%inclusion6 decks44 decks
14%synergy
Mystic Remora
14%inclusion6 decks44 decks
-8%synergy
Grievous Wound
14%inclusion6 decks44 decks
13%synergy
Funeral Room // Awakening Hall
14%inclusion6 decks44 decks
13%synergy
Solitary Confinement
14%inclusion6 decks44 decks
12%synergy
Underwater Tunnel // Slimy Aquarium
14%inclusion6 decks44 decks
13%synergy
Witness Protection
14%inclusion6 decks44 decks
12%synergy
Mirror Room // Fractured Realm
14%inclusion6 decks44 decks
11%synergy
Court of Cunning
11%inclusion5 decks44 decks
10%synergy
Touch the Spirit Realm
11%inclusion5 decks44 decks
9%synergy
Grand Entryway // Elegant Rotunda
11%inclusion5 decks44 decks
11%synergy
Battles
Invasion of Theros
6.8%inclusion3 decks44 decks
5%synergy
Utility Lands
Hall of Heliod's Generosity
48%inclusion21 decks44 decks
35%synergy
Bojuka Bog
36%inclusion16 decks44 decks
9%synergy
Halimar Depths
18%inclusion8 decks44 decks
13%synergy
Dakmor Salvage
9.1%inclusion4 decks44 decks
9%synergy
Reliquary Tower
9.1%inclusion4 decks44 decks
-25%synergy
Cephalid Coliseum
6.8%inclusion3 decks44 decks
3%synergy
Rogue's Passage
6.8%inclusion3 decks44 decks
-3%synergy
Temple of the False God
6.8%inclusion3 decks44 decks
-1%synergy
Mana Artifacts
Arcane Signet
77%inclusion34 decks44 decks
-11%synergy
Sol Ring
75%inclusion33 decks44 decks
-15%synergy
Azorius Signet
59%inclusion26 decks44 decks
27%synergy
Orzhov Signet
55%inclusion24 decks44 decks
21%synergy
Talisman of Progress
32%inclusion14 decks44 decks
-11%synergy
Mind Stone
30%inclusion13 decks44 decks
17%synergy
Talisman of Hierarchy
30%inclusion13 decks44 decks
-14%synergy
Talisman of Dominance
27%inclusion12 decks44 decks
-22%synergy
Fellwar Stone
27%inclusion12 decks44 decks
-6%synergy
Dimir Signet
25%inclusion11 decks44 decks
-7%synergy
Commander's Sphere
18%inclusion8 decks44 decks
-1%synergy
Sky Diamond
9.1%inclusion4 decks44 decks
8%synergy
Chromatic Lantern
9.1%inclusion4 decks44 decks
-4%synergy
Marble Diamond
9.1%inclusion4 decks44 decks
8%synergy
Bender's Waterskin
8.3%inclusion2 decks24 decks
4%synergy
Hourglass of the Lost
6.8%inclusion3 decks44 decks
7%synergy
Lands
Swamp
100%inclusion44 decks44 decks
9%synergy
Island
100%inclusion44 decks44 decks
7%synergy
Plains
100%inclusion44 decks44 decks
8%synergy
Command Tower
91%inclusion40 decks44 decks
-2%synergy
Arcane Sanctum
73%inclusion32 decks44 decks
18%synergy
Caves of Koilos
61%inclusion27 decks44 decks
26%synergy
Dimir Aqueduct
50%inclusion22 decks44 decks
36%synergy
Evolving Wilds
50%inclusion22 decks44 decks
25%synergy
Terramorphic Expanse
48%inclusion21 decks44 decks
31%synergy
Azorius Chancery
48%inclusion21 decks44 decks
34%synergy
Orzhov Basilica
48%inclusion21 decks44 decks
32%synergy
Adarkar Wastes
48%inclusion21 decks44 decks
17%synergy
Temple of Enlightenment
43%inclusion19 decks44 decks
27%synergy
Underground River
41%inclusion18 decks44 decks
8%synergy
Temple of Silence
41%inclusion18 decks44 decks
22%synergy
Isolated Chapel
39%inclusion17 decks44 decks
-1%synergy
Exotic Orchard
39%inclusion17 decks44 decks
-20%synergy
Prairie Stream
36%inclusion16 decks44 decks
-4%synergy
Glacial Fortress
36%inclusion16 decks44 decks
-4%synergy
Sunken Hollow
36%inclusion16 decks44 decks
-3%synergy
Obscura Storefront
36%inclusion16 decks44 decks
26%synergy
Temple of Deceit
32%inclusion14 decks44 decks
14%synergy
Skycloud Expanse
32%inclusion14 decks44 decks
17%synergy
Ash Barrens
32%inclusion14 decks44 decks
21%synergy
Valgavoth's Lair
27%inclusion12 decks44 decks
24%synergy
Contaminated Landscape
27%inclusion12 decks44 decks
13%synergy
Darkwater Catacombs
27%inclusion12 decks44 decks
13%synergy
Tainted Field
25%inclusion11 decks44 decks
18%synergy
Thriving Heath
25%inclusion11 decks44 decks
21%synergy
Drowned Catacomb
25%inclusion11 decks44 decks
-11%synergy
Port Town
20%inclusion9 decks44 decks
4%synergy
Thriving Isle
20%inclusion9 decks44 decks
16%synergy
Tainted Isle
20%inclusion9 decks44 decks
14%synergy
Myriad Landscape
18%inclusion8 decks44 decks
10%synergy
Path of Ancestry
18%inclusion8 decks44 decks
-9%synergy
Thriving Moor
18%inclusion8 decks44 decks
14%synergy
Fetid Heath
16%inclusion7 decks44 decks
4%synergy
Choked Estuary
16%inclusion7 decks44 decks
0%synergy
Idyllic Beachfront
14%inclusion6 decks44 decks
10%synergy
Desolate Mire
14%inclusion6 decks44 decks
7%synergy
Shineshadow Snarl
14%inclusion6 decks44 decks
3%synergy
Abandoned Campground
14%inclusion6 decks44 decks
13%synergy
Tranquil Cove
11%inclusion5 decks44 decks
5%synergy
Dismal Backwater
11%inclusion5 decks44 decks
5%synergy
Sunlit Marsh
11%inclusion5 decks44 decks
7%synergy
Concealed Courtyard
9.1%inclusion4 decks44 decks
5%synergy
Irrigated Farmland
9.1%inclusion4 decks44 decks
2%synergy
Floodfarm Verge
9.1%inclusion4 decks44 decks
-2%synergy
Glacial Floodplain
6.8%inclusion3 decks44 decks
6%synergy
Murky Sewer
6.8%inclusion3 decks44 decks
6%synergy
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