The Master of Keys (Commander) - Budget Upgraded

The Master of Keys
Rank #305
49decks
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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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Twilight Diviner
7.7%inclusion1 decks13 decks
6%synergy
Noggle the Mind
7.7%inclusion1 decks13 decks
7%synergy
Mornsong Aria
7.7%inclusion1 decks13 decks
7%synergy
High Synergy Cards
Starfield Mystic
71%inclusion35 decks49 decks
65%synergy
Mesa Enchantress
71%inclusion35 decks49 decks
62%synergy
Inquisitive Glimmer
69%inclusion34 decks49 decks
62%synergy
Doomwake Giant
65%inclusion32 decks49 decks
59%synergy
Fear of Sleep Paralysis
61%inclusion30 decks49 decks
56%synergy
Demon of Fate's Design
59%inclusion29 decks49 decks
54%synergy
Entity Tracker
59%inclusion29 decks49 decks
53%synergy
Secret Arcade // Dusty Parlor
55%inclusion27 decks49 decks
50%synergy
Scrabbling Skullcrab
47%inclusion23 decks49 decks
46%synergy
Gravebreaker Lamia
45%inclusion22 decks49 decks
44%synergy
Top Cards
Sphere of Safety
49%inclusion24 decks49 decks
40%synergy
Mirrormade
47%inclusion23 decks49 decks
37%synergy
Sigil of the Empty Throne
47%inclusion23 decks49 decks
41%synergy
Victor, Valgavoth's Seneschal
45%inclusion22 decks49 decks
43%synergy
Ondu Spiritdancer
45%inclusion22 decks49 decks
39%synergy
Cemetery Tampering
43%inclusion21 decks49 decks
42%synergy
Swords to Plowshares
43%inclusion21 decks49 decks
-25%synergy
Ghostly Dancers
43%inclusion21 decks49 decks
40%synergy
Redress Fate
43%inclusion21 decks49 decks
37%synergy
Moon-Blessed Cleric
41%inclusion20 decks49 decks
36%synergy
Creatures
Fear of Impostors
39%inclusion19 decks49 decks
37%synergy
Archetype of Imagination
31%inclusion15 decks49 decks
26%synergy
Soaring Lightbringer
31%inclusion15 decks49 decks
26%synergy
Aminatou, Veil Piercer
31%inclusion15 decks49 decks
29%synergy
Zur the Enchanter
31%inclusion15 decks49 decks
25%synergy
Archon of Sun's Grace
29%inclusion14 decks49 decks
24%synergy
Silent Hallcreeper
29%inclusion14 decks49 decks
24%synergy
Athreos, Shroud-Veiled
27%inclusion13 decks49 decks
22%synergy
Zur, Eternal Schemer
22%inclusion11 decks49 decks
19%synergy
Mindwrack Harpy
22%inclusion11 decks49 decks
22%synergy
Grim Guardian
22%inclusion11 decks49 decks
20%synergy
Alseid of Life's Bounty
22%inclusion11 decks49 decks
21%synergy
Skullsnap Nuisance
20%inclusion10 decks49 decks
20%synergy
Overlord of the Floodpits
20%inclusion10 decks49 decks
17%synergy
Gremlin Tamer
20%inclusion10 decks49 decks
19%synergy
Balemurk Leech
20%inclusion10 decks49 decks
20%synergy
Sage of Mysteries
18%inclusion9 decks49 decks
18%synergy
Ancient Cellarspawn
16%inclusion8 decks49 decks
13%synergy
Fear of Infinity
16%inclusion8 decks49 decks
16%synergy
Millikin
16%inclusion8 decks49 decks
16%synergy
Solemn Simulacrum
14%inclusion7 decks49 decks
0%synergy
Stitcher's Supplier
14%inclusion7 decks49 decks
14%synergy
Heliod, the Radiant Dawn
14%inclusion7 decks49 decks
11%synergy
Enduring Curiosity
12%inclusion6 decks49 decks
4%synergy
Deranged Assistant
12%inclusion6 decks49 decks
12%synergy
Metamorphosis Fanatic
12%inclusion6 decks49 decks
8%synergy
Optimistic Scavenger
12%inclusion6 decks49 decks
12%synergy
Phenomenon Investigators
12%inclusion6 decks49 decks
12%synergy
Stenn, Paranoid Partisan
10%inclusion5 decks49 decks
9%synergy
Verge Rangers
10%inclusion5 decks49 decks
9%synergy
Fear of Isolation
10%inclusion5 decks49 decks
10%synergy
Nashi, Searcher in the Dark
10%inclusion5 decks49 decks
10%synergy
Auramancer
10%inclusion5 decks49 decks
7%synergy
Hydroelectric Specimen
8.2%inclusion4 decks49 decks
5%synergy
Overlord of the Balemurk
8.2%inclusion4 decks49 decks
6%synergy
Sram, Senior Edificer
8.2%inclusion4 decks49 decks
3%synergy
Arvinox, the Mind Flail
8.2%inclusion4 decks49 decks
7%synergy
Sun Titan
8.2%inclusion4 decks49 decks
0%synergy
Stinkweed Imp
8.2%inclusion4 decks49 decks
8%synergy
Starnheim Courser
8.2%inclusion4 decks49 decks
4%synergy
Burnished Hart
8.2%inclusion4 decks49 decks
5%synergy
Enduring Tenacity
8.2%inclusion4 decks49 decks
1%synergy
Nightmare Shepherd
8.2%inclusion4 decks49 decks
6%synergy
Spirited Companion
8.2%inclusion4 decks49 decks
6%synergy
Creeping Peeper
8.2%inclusion4 decks49 decks
8%synergy
Lurrus of the Dream-Den
6.1%inclusion3 decks49 decks
5%synergy
Agent of Erebos
6.1%inclusion3 decks49 decks
6%synergy
Fear of Surveillance
6.1%inclusion3 decks49 decks
6%synergy
Overlord of the Mistmoors
6.1%inclusion3 decks49 decks
4%synergy
Pearl-Ear, Imperial Advisor
6.1%inclusion3 decks49 decks
4%synergy
Instants
Thirst for Meaning
24%inclusion12 decks49 decks
23%synergy
Counterspell
24%inclusion12 decks49 decks
-17%synergy
Arcane Denial
24%inclusion12 decks49 decks
4%synergy
Path to Exile
22%inclusion11 decks49 decks
-20%synergy
Inkshield
22%inclusion11 decks49 decks
13%synergy
Frantic Search
22%inclusion11 decks49 decks
5%synergy
Otherworldly Gaze
20%inclusion10 decks49 decks
18%synergy
Brainstorm
18%inclusion9 decks49 decks
1%synergy
Void Rend
18%inclusion9 decks49 decks
-16%synergy
Utter End
16%inclusion8 decks49 decks
10%synergy
Return to Dust
12%inclusion6 decks49 decks
9%synergy
Negate
12%inclusion6 decks49 decks
-4%synergy
Get Out
10%inclusion5 decks49 decks
10%synergy
Fact or Fiction
10%inclusion5 decks49 decks
7%synergy
Telling Time
8.2%inclusion4 decks49 decks
6%synergy
Confounding Riddle
8.2%inclusion4 decks49 decks
8%synergy
Dovin's Veto
6.1%inclusion3 decks49 decks
-19%synergy
An Offer You Can't Refuse
6.1%inclusion3 decks49 decks
-21%synergy
Sublime Epiphany
6.1%inclusion3 decks49 decks
3%synergy
Reality Shift
6.1%inclusion3 decks49 decks
5%synergy
Slip Out the Back
6.1%inclusion3 decks49 decks
5%synergy
Waterlogged Teachings
6.1%inclusion3 decks49 decks
2%synergy
Muddle the Mixture
6.1%inclusion3 decks49 decks
2%synergy
Murder
6.1%inclusion3 decks49 decks
4%synergy
Don't Make a Sound
6.1%inclusion3 decks49 decks
6%synergy
Stroke of Midnight
6.1%inclusion3 decks49 decks
-2%synergy
Sorceries
Sevinne's Reclamation
35%inclusion17 decks49 decks
26%synergy
Extinguish All Hope
27%inclusion13 decks49 decks
25%synergy
Time Wipe
24%inclusion12 decks49 decks
18%synergy
Singularity Rupture
21%inclusion6 decks29 decks
18%synergy
Dance of the Manse
14%inclusion7 decks49 decks
11%synergy
Resurgent Belief
14%inclusion7 decks49 decks
12%synergy
Ponder
14%inclusion7 decks49 decks
5%synergy
Read the Bones
12%inclusion6 decks49 decks
8%synergy
Open the Vaults
12%inclusion6 decks49 decks
11%synergy
Buried Alive
10%inclusion5 decks49 decks
6%synergy
Aminatou's Augury
10%inclusion5 decks49 decks
9%synergy
Diabolic Vision
10%inclusion5 decks49 decks
8%synergy
Demonic Counsel
10%inclusion5 decks49 decks
9%synergy
Brilliant Restoration
10%inclusion5 decks49 decks
8%synergy
Terminus
10%inclusion5 decks49 decks
6%synergy
Glimpse the Unthinkable
8.2%inclusion4 decks49 decks
8%synergy
Traumatize
8.2%inclusion4 decks49 decks
8%synergy
Windfall
8.2%inclusion4 decks49 decks
-5%synergy
Winds of Rath
6.1%inclusion3 decks49 decks
3%synergy
Final Vengeance
6.1%inclusion3 decks49 decks
6%synergy
Back for Seconds
6.1%inclusion3 decks49 decks
6%synergy
Avatar's Wrath
5.0%inclusion1 decks20 decks
3%synergy
Utility Artifacts
Keys to the House
16%inclusion8 decks49 decks
16%synergy
Cloud Key
12%inclusion6 decks49 decks
9%synergy
Whip of Erebos
8.2%inclusion4 decks49 decks
6%synergy
Wayfarer's Bauble
8.2%inclusion4 decks49 decks
0%synergy
Perpetual Timepiece
6.1%inclusion3 decks49 decks
6%synergy
Swiftfoot Boots
6.1%inclusion3 decks49 decks
-18%synergy
The Fire Nation Drill
5.0%inclusion1 decks20 decks
5%synergy
Enchantments
Seal of Cleansing
41%inclusion20 decks49 decks
39%synergy
Grasp of Fate
37%inclusion18 decks49 decks
31%synergy
All That Glitters
35%inclusion17 decks49 decks
26%synergy
Timely Ward
33%inclusion16 decks49 decks
28%synergy
Ethereal Armor
33%inclusion16 decks49 decks
28%synergy
Ripples of Undeath
31%inclusion15 decks49 decks
28%synergy
Monologue Tax
31%inclusion15 decks49 decks
24%synergy
The Eldest Reborn
31%inclusion15 decks49 decks
28%synergy
Amphibian Downpour
31%inclusion15 decks49 decks
26%synergy
The Tale of Tamiyo
29%inclusion14 decks49 decks
28%synergy
Extravagant Replication
29%inclusion14 decks49 decks
24%synergy
Dress Down
29%inclusion14 decks49 decks
26%synergy
Cacophony Unleashed
29%inclusion14 decks49 decks
27%synergy
Estrid's Invocation
27%inclusion13 decks49 decks
22%synergy
Restricted Office // Lecture Hall
27%inclusion13 decks49 decks
24%synergy
Defiled Crypt // Cadaver Lab
27%inclusion13 decks49 decks
26%synergy
Cramped Vents // Access Maze
27%inclusion13 decks49 decks
24%synergy
Central Elevator // Promising Stairs
27%inclusion13 decks49 decks
26%synergy
Bottomless Pool // Locker Room
27%inclusion13 decks49 decks
25%synergy
Stillness in Motion
25%inclusion11 decks44 decks
25%synergy
One with the Multiverse
24%inclusion12 decks49 decks
20%synergy
Propaganda
24%inclusion12 decks49 decks
-3%synergy
Imprisoned in the Moon
22%inclusion11 decks49 decks
16%synergy
Seal of Removal
22%inclusion11 decks49 decks
22%synergy
Animate Dead
22%inclusion11 decks49 decks
13%synergy
Copy Enchantment
20%inclusion10 decks49 decks
16%synergy
Shark Typhoon
20%inclusion10 decks49 decks
15%synergy
Cast Out
20%inclusion10 decks49 decks
18%synergy
Polluted Cistern // Dim Oubliette
18%inclusion9 decks49 decks
18%synergy
Secrets of the Dead
16%inclusion8 decks49 decks
16%synergy
Darksteel Mutation
16%inclusion8 decks49 decks
10%synergy
Nowhere to Run
16%inclusion8 decks49 decks
15%synergy
Search for Azcanta
16%inclusion8 decks49 decks
15%synergy
Grievous Wound
16%inclusion8 decks49 decks
16%synergy
Utter Insignificance
14%inclusion7 decks49 decks
14%synergy
Soul Snare
14%inclusion7 decks49 decks
14%synergy
Surgical Suite // Hospital Room
14%inclusion7 decks49 decks
14%synergy
Unholy Annex // Ritual Chamber
14%inclusion7 decks49 decks
14%synergy
Dazzling Theater // Prop Room
14%inclusion7 decks49 decks
13%synergy
Derelict Attic // Widow's Walk
14%inclusion7 decks49 decks
14%synergy
Mirror Room // Fractured Realm
14%inclusion7 decks49 decks
12%synergy
Chronic Flooding
12%inclusion6 decks49 decks
12%synergy
Mystic Remora
12%inclusion6 decks49 decks
-9%synergy
Solitary Confinement
12%inclusion6 decks49 decks
10%synergy
Meat Locker // Drowned Diner
12%inclusion6 decks49 decks
12%synergy
Funeral Room // Awakening Hall
12%inclusion6 decks49 decks
11%synergy
Witness Protection
12%inclusion6 decks49 decks
10%synergy
Trapped in the Screen
10%inclusion5 decks49 decks
10%synergy
Mantle of the Ancients
10%inclusion5 decks49 decks
7%synergy
Curator's Ward
10%inclusion5 decks49 decks
7%synergy
Battles
Invasion of Theros
8.2%inclusion4 decks49 decks
6%synergy
Utility Lands
Hall of Heliod's Generosity
55%inclusion27 decks49 decks
42%synergy
Bojuka Bog
35%inclusion17 decks49 decks
8%synergy
Halimar Depths
18%inclusion9 decks49 decks
14%synergy
Reliquary Tower
12%inclusion6 decks49 decks
-22%synergy
Rogue's Passage
10%inclusion5 decks49 decks
1%synergy
Temple of the False God
8.2%inclusion4 decks49 decks
0%synergy
Dakmor Salvage
8.2%inclusion4 decks49 decks
8%synergy
Cephalid Coliseum
6.1%inclusion3 decks49 decks
3%synergy
Mana Artifacts
Arcane Signet
82%inclusion40 decks49 decks
-6%synergy
Sol Ring
80%inclusion39 decks49 decks
-10%synergy
Azorius Signet
61%inclusion30 decks49 decks
30%synergy
Orzhov Signet
57%inclusion28 decks49 decks
24%synergy
Talisman of Progress
35%inclusion17 decks49 decks
-9%synergy
Talisman of Hierarchy
33%inclusion16 decks49 decks
-11%synergy
Talisman of Dominance
33%inclusion16 decks49 decks
-17%synergy
Dimir Signet
31%inclusion15 decks49 decks
-1%synergy
Fellwar Stone
29%inclusion14 decks49 decks
-5%synergy
Mind Stone
29%inclusion14 decks49 decks
16%synergy
Commander's Sphere
16%inclusion8 decks49 decks
-2%synergy
Chromatic Lantern
10%inclusion5 decks49 decks
-3%synergy
Sky Diamond
8.2%inclusion4 decks49 decks
7%synergy
Marble Diamond
8.2%inclusion4 decks49 decks
7%synergy
Hourglass of the Lost
6.1%inclusion3 decks49 decks
6%synergy
Lands
Island
100%inclusion49 decks49 decks
7%synergy
Swamp
100%inclusion49 decks49 decks
8%synergy
Plains
100%inclusion49 decks49 decks
8%synergy
Command Tower
92%inclusion45 decks49 decks
-1%synergy
Arcane Sanctum
76%inclusion37 decks49 decks
21%synergy
Caves of Koilos
63%inclusion31 decks49 decks
28%synergy
Evolving Wilds
51%inclusion25 decks49 decks
26%synergy
Adarkar Wastes
51%inclusion25 decks49 decks
19%synergy
Terramorphic Expanse
49%inclusion24 decks49 decks
33%synergy
Azorius Chancery
49%inclusion24 decks49 decks
35%synergy
Dimir Aqueduct
49%inclusion24 decks49 decks
36%synergy
Orzhov Basilica
49%inclusion24 decks49 decks
34%synergy
Temple of Enlightenment
45%inclusion22 decks49 decks
29%synergy
Underground River
45%inclusion22 decks49 decks
11%synergy
Isolated Chapel
41%inclusion20 decks49 decks
1%synergy
Temple of Silence
41%inclusion20 decks49 decks
22%synergy
Glacial Fortress
39%inclusion19 decks49 decks
-3%synergy
Exotic Orchard
39%inclusion19 decks49 decks
-20%synergy
Sunken Hollow
35%inclusion17 decks49 decks
-5%synergy
Prairie Stream
35%inclusion17 decks49 decks
-6%synergy
Obscura Storefront
35%inclusion17 decks49 decks
25%synergy
Temple of Deceit
33%inclusion16 decks49 decks
15%synergy
Skycloud Expanse
31%inclusion15 decks49 decks
16%synergy
Ash Barrens
29%inclusion14 decks49 decks
18%synergy
Contaminated Landscape
29%inclusion14 decks49 decks
15%synergy
Tainted Field
29%inclusion14 decks49 decks
22%synergy
Valgavoth's Lair
27%inclusion13 decks49 decks
24%synergy
Drowned Catacomb
27%inclusion13 decks49 decks
-10%synergy
Tainted Isle
24%inclusion12 decks49 decks
18%synergy
Darkwater Catacombs
24%inclusion12 decks49 decks
10%synergy
Thriving Heath
24%inclusion12 decks49 decks
20%synergy
Thriving Isle
22%inclusion11 decks49 decks
18%synergy
Fetid Heath
16%inclusion8 decks49 decks
4%synergy
Port Town
16%inclusion8 decks49 decks
-1%synergy
Path of Ancestry
16%inclusion8 decks49 decks
-11%synergy
Thriving Moor
16%inclusion8 decks49 decks
12%synergy
Myriad Landscape
16%inclusion8 decks49 decks
8%synergy
Abandoned Campground
14%inclusion7 decks49 decks
14%synergy
Choked Estuary
14%inclusion7 decks49 decks
-2%synergy
Dismal Backwater
14%inclusion7 decks49 decks
8%synergy
Desolate Mire
14%inclusion7 decks49 decks
8%synergy
Tranquil Cove
14%inclusion7 decks49 decks
8%synergy
Shineshadow Snarl
12%inclusion6 decks49 decks
2%synergy
Idyllic Beachfront
12%inclusion6 decks49 decks
8%synergy
Irrigated Farmland
10%inclusion5 decks49 decks
3%synergy
Sunlit Marsh
10%inclusion5 decks49 decks
6%synergy
Scoured Barrens
10%inclusion5 decks49 decks
4%synergy
Concealed Courtyard
8.2%inclusion4 decks49 decks
4%synergy
Glasswing Grace
8.2%inclusion4 decks49 decks
5%synergy
Hydroelectric Specimen
8.2%inclusion4 decks49 decks
5%synergy
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