The Master of Keys (Commander) - Budget Upgraded

The Master of Keys
Rank #300
52decks
As CommanderAs CardAverage DeckDecksView Precon
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Budget
Any$$$$
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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Mana Artifacts
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Eiganjo Dynastorian
27%inclusion3 decks11 decks
26%synergy
Eclipsed Steppe
9.1%inclusion1 decks11 decks
7%synergy
Coercive Impetus
9.1%inclusion1 decks11 decks
9%synergy
High Synergy Cards
Inquisitive Glimmer
69%inclusion36 decks52 decks
62%synergy
Starfield Mystic
65%inclusion34 decks52 decks
59%synergy
Mesa Enchantress
65%inclusion34 decks52 decks
57%synergy
Secret Arcade // Dusty Parlor
58%inclusion30 decks52 decks
53%synergy
Fear of Sleep Paralysis
58%inclusion30 decks52 decks
53%synergy
Demon of Fate's Design
58%inclusion30 decks52 decks
52%synergy
Doomwake Giant
56%inclusion29 decks52 decks
50%synergy
Entity Tracker
56%inclusion29 decks52 decks
50%synergy
Gravebreaker Lamia
50%inclusion26 decks52 decks
49%synergy
Cemetery Tampering
48%inclusion25 decks52 decks
47%synergy
Top Cards
Scrabbling Skullcrab
48%inclusion25 decks52 decks
47%synergy
Victor, Valgavoth's Seneschal
48%inclusion25 decks52 decks
46%synergy
Ghostly Dancers
44%inclusion23 decks52 decks
42%synergy
Sigil of the Empty Throne
42%inclusion22 decks52 decks
37%synergy
Fear of Impostors
42%inclusion22 decks52 decks
41%synergy
Mirrormade
42%inclusion22 decks52 decks
33%synergy
Sphere of Safety
42%inclusion22 decks52 decks
33%synergy
Ondu Spiritdancer
42%inclusion22 decks52 decks
36%synergy
Redress Fate
40%inclusion21 decks52 decks
35%synergy
Seal of Cleansing
38%inclusion20 decks52 decks
37%synergy
Creatures
Moon-Blessed Cleric
37%inclusion19 decks52 decks
32%synergy
Silent Hallcreeper
33%inclusion17 decks52 decks
28%synergy
Archon of Sun's Grace
31%inclusion16 decks52 decks
26%synergy
Archetype of Imagination
31%inclusion16 decks52 decks
26%synergy
Zur the Enchanter
29%inclusion15 decks52 decks
24%synergy
Sage of Mysteries
25%inclusion13 decks52 decks
25%synergy
Soaring Lightbringer
25%inclusion13 decks52 decks
20%synergy
Grim Guardian
25%inclusion13 decks52 decks
23%synergy
Aminatou, Veil Piercer
23%inclusion12 decks52 decks
22%synergy
Zur, Eternal Schemer
23%inclusion12 decks52 decks
20%synergy
Overlord of the Floodpits
21%inclusion11 decks52 decks
18%synergy
Gremlin Tamer
21%inclusion11 decks52 decks
20%synergy
Balemurk Leech
21%inclusion11 decks52 decks
21%synergy
Alseid of Life's Bounty
19%inclusion10 decks52 decks
18%synergy
Mindwrack Harpy
19%inclusion10 decks52 decks
19%synergy
Ancient Cellarspawn
19%inclusion10 decks52 decks
16%synergy
Skullsnap Nuisance
17%inclusion9 decks52 decks
17%synergy
Athreos, Shroud-Veiled
17%inclusion9 decks52 decks
13%synergy
Fear of Infinity
15%inclusion8 decks52 decks
15%synergy
Stitcher's Supplier
15%inclusion8 decks52 decks
15%synergy
Overlord of the Mistmoors
13%inclusion7 decks52 decks
11%synergy
Enduring Curiosity
13%inclusion7 decks52 decks
5%synergy
Millikin
13%inclusion7 decks52 decks
13%synergy
Metamorphosis Fanatic
12%inclusion6 decks52 decks
7%synergy
Solemn Simulacrum
12%inclusion6 decks52 decks
-2%synergy
Hydroelectric Specimen
12%inclusion6 decks52 decks
9%synergy
Appendage Amalgam
12%inclusion6 decks52 decks
11%synergy
Deranged Assistant
12%inclusion6 decks52 decks
11%synergy
Auramancer
12%inclusion6 decks52 decks
9%synergy
Heliod, the Radiant Dawn
12%inclusion6 decks52 decks
8%synergy
Twilight Diviner
11%inclusion2 decks18 decks
10%synergy
Summon: Ixion
11%inclusion4 decks38 decks
10%synergy
Optimistic Scavenger
10%inclusion5 decks52 decks
9%synergy
Stenn, Paranoid Partisan
10%inclusion5 decks52 decks
8%synergy
Fear of Surveillance
10%inclusion5 decks52 decks
9%synergy
Overlord of the Balemurk
10%inclusion5 decks52 decks
8%synergy
Arvinox, the Mind Flail
10%inclusion5 decks52 decks
8%synergy
Spirited Companion
10%inclusion5 decks52 decks
8%synergy
Nashi, Searcher in the Dark
10%inclusion5 decks52 decks
9%synergy
Verge Rangers
10%inclusion5 decks52 decks
9%synergy
Stinkweed Imp
10%inclusion5 decks52 decks
9%synergy
Fear of Isolation
7.7%inclusion4 decks52 decks
7%synergy
Hedron Crab
7.7%inclusion4 decks52 decks
7%synergy
Boggart Trawler
7.7%inclusion4 decks52 decks
5%synergy
Sram, Senior Edificer
7.7%inclusion4 decks52 decks
3%synergy
Fear of the Dark
7.7%inclusion4 decks52 decks
7%synergy
Abdel Adrian, Gorion's Ward
7.7%inclusion4 decks52 decks
6%synergy
Burnished Hart
7.7%inclusion4 decks52 decks
5%synergy
Creeping Peeper
7.7%inclusion4 decks52 decks
7%synergy
Sun Titan
7.7%inclusion4 decks52 decks
0%synergy
Instants
Swords to Plowshares
35%inclusion18 decks52 decks
-33%synergy
Thirst for Meaning
25%inclusion13 decks52 decks
24%synergy
Frantic Search
21%inclusion11 decks52 decks
3%synergy
Arcane Denial
21%inclusion11 decks52 decks
1%synergy
Counterspell
21%inclusion11 decks52 decks
-21%synergy
Otherworldly Gaze
19%inclusion10 decks52 decks
17%synergy
Inkshield
19%inclusion10 decks52 decks
10%synergy
Void Rend
17%inclusion9 decks52 decks
-17%synergy
Negate
15%inclusion8 decks52 decks
-1%synergy
Brainstorm
15%inclusion8 decks52 decks
-1%synergy
Utter End
15%inclusion8 decks52 decks
9%synergy
Path to Exile
15%inclusion8 decks52 decks
-27%synergy
Get Out
13%inclusion7 decks52 decks
13%synergy
Fact or Fiction
12%inclusion6 decks52 decks
8%synergy
Return to Dust
12%inclusion6 decks52 decks
8%synergy
Don't Make a Sound
12%inclusion6 decks52 decks
11%synergy
Confounding Riddle
7.7%inclusion4 decks52 decks
7%synergy
An Offer You Can't Refuse
7.7%inclusion4 decks52 decks
-20%synergy
Twist Reality
7.7%inclusion4 decks52 decks
8%synergy
Murder
7.7%inclusion4 decks52 decks
6%synergy
Muddle the Mixture
5.8%inclusion3 decks52 decks
2%synergy
Run Away Together
5.8%inclusion3 decks52 decks
5%synergy
Telling Time
5.8%inclusion3 decks52 decks
4%synergy
Dovin's Veto
5.8%inclusion3 decks52 decks
-20%synergy
Slip Out the Back
5.8%inclusion3 decks52 decks
5%synergy
Sublime Epiphany
5.8%inclusion3 decks52 decks
3%synergy
Reality Shift
5.8%inclusion3 decks52 decks
4%synergy
Rowan's Grim Search
5.8%inclusion3 decks52 decks
6%synergy
Stroke of Midnight
5.8%inclusion3 decks52 decks
-2%synergy
Faithful Mending
5.8%inclusion3 decks52 decks
2%synergy
Thirst for Identity
5.6%inclusion1 decks18 decks
4%synergy
Sorceries
Sevinne's Reclamation
29%inclusion15 decks52 decks
20%synergy
Extinguish All Hope
23%inclusion12 decks52 decks
21%synergy
Time Wipe
19%inclusion10 decks52 decks
13%synergy
Resurgent Belief
15%inclusion8 decks52 decks
13%synergy
Dance of the Manse
15%inclusion8 decks52 decks
12%synergy
Singularity Rupture
15%inclusion5 decks34 decks
12%synergy
Ponder
13%inclusion7 decks52 decks
4%synergy
Read the Bones
12%inclusion6 decks52 decks
7%synergy
Open the Vaults
10%inclusion5 decks52 decks
8%synergy
Demonic Counsel
10%inclusion5 decks52 decks
9%synergy
Buried Alive
10%inclusion5 decks52 decks
5%synergy
Space-Time Anomaly
8.8%inclusion3 decks34 decks
7%synergy
Terminus
7.7%inclusion4 decks52 decks
4%synergy
Brilliant Restoration
7.7%inclusion4 decks52 decks
6%synergy
Glimpse the Unthinkable
7.7%inclusion4 decks52 decks
7%synergy
Diabolic Vision
7.7%inclusion4 decks52 decks
5%synergy
Aminatou's Augury
7.7%inclusion4 decks52 decks
6%synergy
Back for Seconds
7.7%inclusion4 decks52 decks
8%synergy
Windfall
5.8%inclusion3 decks52 decks
-7%synergy
Come Back Wrong
5.8%inclusion3 decks52 decks
5%synergy
Traumatize
5.8%inclusion3 decks52 decks
5%synergy
Winds of Rath
5.8%inclusion3 decks52 decks
3%synergy
Final Vengeance
5.8%inclusion3 decks52 decks
6%synergy
Utility Artifacts
Keys to the House
17%inclusion9 decks52 decks
17%synergy
Cloud Key
13%inclusion7 decks52 decks
10%synergy
Whip of Erebos
10%inclusion5 decks52 decks
7%synergy
Perpetual Timepiece
7.7%inclusion4 decks52 decks
7%synergy
Wayfarer's Bauble
5.8%inclusion3 decks52 decks
-2%synergy
Spy Kit
5.8%inclusion3 decks52 decks
6%synergy
Mystery Key
5.8%inclusion3 decks52 decks
6%synergy
Swiftfoot Boots
5.8%inclusion3 decks52 decks
-18%synergy
Enchantments
Grasp of Fate
35%inclusion18 decks52 decks
29%synergy
Ripples of Undeath
33%inclusion17 decks52 decks
30%synergy
All That Glitters
33%inclusion17 decks52 decks
24%synergy
The Eldest Reborn
31%inclusion16 decks52 decks
28%synergy
Amphibian Downpour
31%inclusion16 decks52 decks
26%synergy
The Tale of Tamiyo
31%inclusion16 decks52 decks
30%synergy
Defiled Crypt // Cadaver Lab
31%inclusion16 decks52 decks
30%synergy
Cramped Vents // Access Maze
29%inclusion15 decks52 decks
27%synergy
Central Elevator // Promising Stairs
29%inclusion15 decks52 decks
28%synergy
Bottomless Pool // Locker Room
29%inclusion15 decks52 decks
27%synergy
Ethereal Armor
29%inclusion15 decks52 decks
24%synergy
Restricted Office // Lecture Hall
29%inclusion15 decks52 decks
27%synergy
Cacophony Unleashed
27%inclusion14 decks52 decks
25%synergy
Dress Down
27%inclusion14 decks52 decks
25%synergy
Extravagant Replication
25%inclusion13 decks52 decks
20%synergy
Estrid's Invocation
25%inclusion13 decks52 decks
20%synergy
Timely Ward
25%inclusion13 decks52 decks
20%synergy
Monologue Tax
25%inclusion13 decks52 decks
19%synergy
Seal of Removal
23%inclusion12 decks52 decks
22%synergy
Propaganda
23%inclusion12 decks52 decks
-5%synergy
Stillness in Motion
23%inclusion11 decks48 decks
23%synergy
One with the Multiverse
21%inclusion11 decks52 decks
16%synergy
Copy Enchantment
21%inclusion11 decks52 decks
16%synergy
Animate Dead
21%inclusion11 decks52 decks
12%synergy
Polluted Cistern // Dim Oubliette
21%inclusion11 decks52 decks
21%synergy
Darksteel Mutation
19%inclusion10 decks52 decks
13%synergy
Secrets of the Dead
19%inclusion10 decks52 decks
19%synergy
Dazzling Theater // Prop Room
19%inclusion10 decks52 decks
18%synergy
Unholy Annex // Ritual Chamber
19%inclusion10 decks52 decks
18%synergy
Grievous Wound
17%inclusion9 decks52 decks
16%synergy
Funeral Room // Awakening Hall
17%inclusion9 decks52 decks
16%synergy
Shark Typhoon
17%inclusion9 decks52 decks
12%synergy
Nowhere to Run
17%inclusion9 decks52 decks
16%synergy
Mirror Room // Fractured Realm
17%inclusion9 decks52 decks
15%synergy
Soul Snare
15%inclusion8 decks52 decks
15%synergy
Search for Azcanta
15%inclusion8 decks52 decks
14%synergy
Imprisoned in the Moon
13%inclusion7 decks52 decks
7%synergy
Unable to Scream
13%inclusion7 decks52 decks
12%synergy
Meat Locker // Drowned Diner
13%inclusion7 decks52 decks
13%synergy
Derelict Attic // Widow's Walk
13%inclusion7 decks52 decks
13%synergy
Witness Protection
13%inclusion7 decks52 decks
12%synergy
Surgical Suite // Hospital Room
13%inclusion7 decks52 decks
13%synergy
Ghostly Prison
13%inclusion7 decks52 decks
-9%synergy
Mystic Remora
13%inclusion7 decks52 decks
-7%synergy
Cast Out
13%inclusion7 decks52 decks
11%synergy
Trapped in the Screen
12%inclusion6 decks52 decks
11%synergy
Shardmage's Rescue
12%inclusion6 decks52 decks
11%synergy
Utter Insignificance
12%inclusion6 decks52 decks
11%synergy
Chronic Flooding
12%inclusion6 decks52 decks
11%synergy
Eaten by Piranhas
12%inclusion6 decks52 decks
10%synergy
Battles
Invasion of Theros
7.7%inclusion4 decks52 decks
6%synergy
Utility Lands
Hall of Heliod's Generosity
50%inclusion26 decks52 decks
37%synergy
Bojuka Bog
37%inclusion19 decks52 decks
10%synergy
Halimar Depths
19%inclusion10 decks52 decks
15%synergy
Rogue's Passage
13%inclusion7 decks52 decks
4%synergy
Reliquary Tower
10%inclusion5 decks52 decks
-24%synergy
Cephalid Coliseum
10%inclusion5 decks52 decks
6%synergy
Temple of the False God
7.7%inclusion4 decks52 decks
0%synergy
Dakmor Salvage
7.7%inclusion4 decks52 decks
8%synergy
Hostile Hostel
5.8%inclusion3 decks52 decks
6%synergy
Barren Moor
5.8%inclusion3 decks52 decks
4%synergy
Restless Fortress
5.8%inclusion3 decks52 decks
5%synergy
Mana Artifacts
Arcane Signet
77%inclusion40 decks52 decks
-11%synergy
Sol Ring
77%inclusion40 decks52 decks
-13%synergy
Azorius Signet
56%inclusion29 decks52 decks
25%synergy
Orzhov Signet
50%inclusion26 decks52 decks
18%synergy
Talisman of Progress
33%inclusion17 decks52 decks
-11%synergy
Talisman of Dominance
33%inclusion17 decks52 decks
-17%synergy
Talisman of Hierarchy
33%inclusion17 decks52 decks
-12%synergy
Dimir Signet
31%inclusion16 decks52 decks
0%synergy
Mind Stone
25%inclusion13 decks52 decks
13%synergy
Fellwar Stone
23%inclusion12 decks52 decks
-10%synergy
Commander's Sphere
15%inclusion8 decks52 decks
-2%synergy
Chromatic Lantern
7.7%inclusion4 decks52 decks
-5%synergy
Sky Diamond
5.8%inclusion3 decks52 decks
4%synergy
Hourglass of the Lost
5.8%inclusion3 decks52 decks
5%synergy
Marble Diamond
5.8%inclusion3 decks52 decks
5%synergy
Lands
Swamp
100%inclusion52 decks52 decks
8%synergy
Island
100%inclusion52 decks52 decks
7%synergy
Plains
100%inclusion52 decks52 decks
8%synergy
Command Tower
87%inclusion45 decks52 decks
-6%synergy
Arcane Sanctum
73%inclusion38 decks52 decks
19%synergy
Caves of Koilos
63%inclusion33 decks52 decks
28%synergy
Adarkar Wastes
50%inclusion26 decks52 decks
18%synergy
Underground River
48%inclusion25 decks52 decks
14%synergy
Azorius Chancery
46%inclusion24 decks52 decks
33%synergy
Temple of Enlightenment
46%inclusion24 decks52 decks
30%synergy
Orzhov Basilica
46%inclusion24 decks52 decks
31%synergy
Dimir Aqueduct
44%inclusion23 decks52 decks
31%synergy
Terramorphic Expanse
42%inclusion22 decks52 decks
26%synergy
Evolving Wilds
42%inclusion22 decks52 decks
18%synergy
Temple of Silence
42%inclusion22 decks52 decks
24%synergy
Temple of Deceit
40%inclusion21 decks52 decks
23%synergy
Isolated Chapel
38%inclusion20 decks52 decks
-3%synergy
Exotic Orchard
37%inclusion19 decks52 decks
-22%synergy
Contaminated Landscape
35%inclusion18 decks52 decks
21%synergy
Prairie Stream
35%inclusion18 decks52 decks
-6%synergy
Ash Barrens
35%inclusion18 decks52 decks
24%synergy
Sunken Hollow
33%inclusion17 decks52 decks
-7%synergy
Glacial Fortress
31%inclusion16 decks52 decks
-12%synergy
Obscura Storefront
31%inclusion16 decks52 decks
21%synergy
Valgavoth's Lair
29%inclusion15 decks52 decks
26%synergy
Skycloud Expanse
29%inclusion15 decks52 decks
14%synergy
Tainted Field
25%inclusion13 decks52 decks
18%synergy
Darkwater Catacombs
25%inclusion13 decks52 decks
10%synergy
Drowned Catacomb
25%inclusion13 decks52 decks
-13%synergy
Tainted Isle
23%inclusion12 decks52 decks
17%synergy
Thriving Isle
21%inclusion11 decks52 decks
17%synergy
Thriving Moor
21%inclusion11 decks52 decks
17%synergy
Thriving Heath
21%inclusion11 decks52 decks
17%synergy
Fetid Heath
17%inclusion9 decks52 decks
4%synergy
Abandoned Campground
15%inclusion8 decks52 decks
15%synergy
Myriad Landscape
15%inclusion8 decks52 decks
7%synergy
Port Town
15%inclusion8 decks52 decks
-2%synergy
Scoured Barrens
15%inclusion8 decks52 decks
9%synergy
Path of Ancestry
15%inclusion8 decks52 decks
-12%synergy
Desolate Mire
13%inclusion7 decks52 decks
7%synergy
Dismal Backwater
13%inclusion7 decks52 decks
7%synergy
Tranquil Cove
13%inclusion7 decks52 decks
7%synergy
Choked Estuary
13%inclusion7 decks52 decks
-3%synergy
Idyllic Beachfront
12%inclusion6 decks52 decks
7%synergy
Hydroelectric Specimen
12%inclusion6 decks52 decks
9%synergy
Sunlit Marsh
12%inclusion6 decks52 decks
7%synergy
Shineshadow Snarl
12%inclusion6 decks52 decks
1%synergy
Floodfarm Verge
12%inclusion6 decks52 decks
0%synergy
Glasswing Grace
10%inclusion5 decks52 decks
7%synergy
Irrigated Farmland
10%inclusion5 decks52 decks
2%synergy
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