The Master of Keys (Commander) - Budget Upgraded

The Master of Keys
Rank #316
39decks
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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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Utility Lands
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Starfield Mystic
64%inclusion25 decks39 decks
57%synergy
Fear of Sleep Paralysis
62%inclusion24 decks39 decks
56%synergy
Mesa Enchantress
64%inclusion25 decks39 decks
55%synergy
Inquisitive Glimmer
62%inclusion24 decks39 decks
54%synergy
Demon of Fate's Design
59%inclusion23 decks39 decks
53%synergy
Doomwake Giant
59%inclusion23 decks39 decks
53%synergy
Gravebreaker Lamia
51%inclusion20 decks39 decks
50%synergy
Secret Arcade // Dusty Parlor
51%inclusion20 decks39 decks
46%synergy
Entity Tracker
51%inclusion20 decks39 decks
45%synergy
Scrabbling Skullcrab
44%inclusion17 decks39 decks
43%synergy
Top Cards
Sphere of Safety
46%inclusion18 decks39 decks
37%synergy
Sigil of the Empty Throne
46%inclusion18 decks39 decks
40%synergy
Victor, Valgavoth's Seneschal
44%inclusion17 decks39 decks
41%synergy
Fear of Impostors
41%inclusion16 decks39 decks
39%synergy
Mirrormade
41%inclusion16 decks39 decks
31%synergy
Swords to Plowshares
41%inclusion16 decks39 decks
-27%synergy
Redress Fate
41%inclusion16 decks39 decks
35%synergy
Moon-Blessed Cleric
38%inclusion15 decks39 decks
34%synergy
Cemetery Tampering
38%inclusion15 decks39 decks
38%synergy
Ondu Spiritdancer
36%inclusion14 decks39 decks
30%synergy
Creatures
Ghostly Dancers
36%inclusion14 decks39 decks
33%synergy
Soaring Lightbringer
31%inclusion12 decks39 decks
26%synergy
Archetype of Imagination
31%inclusion12 decks39 decks
26%synergy
Silent Hallcreeper
28%inclusion11 decks39 decks
24%synergy
Aminatou, Veil Piercer
26%inclusion10 decks39 decks
24%synergy
Archon of Sun's Grace
26%inclusion10 decks39 decks
21%synergy
Alseid of Life's Bounty
26%inclusion10 decks39 decks
24%synergy
Zur the Enchanter
26%inclusion10 decks39 decks
20%synergy
Mindwrack Harpy
26%inclusion10 decks39 decks
25%synergy
Grim Guardian
21%inclusion8 decks39 decks
18%synergy
Zur, Eternal Schemer
21%inclusion8 decks39 decks
17%synergy
Athreos, Shroud-Veiled
21%inclusion8 decks39 decks
16%synergy
Gremlin Tamer
18%inclusion7 decks39 decks
17%synergy
Ancient Cellarspawn
18%inclusion7 decks39 decks
15%synergy
Solemn Simulacrum
15%inclusion6 decks39 decks
0%synergy
Fear of Infinity
15%inclusion6 decks39 decks
15%synergy
Overlord of the Floodpits
15%inclusion6 decks39 decks
12%synergy
Skullsnap Nuisance
15%inclusion6 decks39 decks
15%synergy
Balemurk Leech
15%inclusion6 decks39 decks
15%synergy
Sage of Mysteries
15%inclusion6 decks39 decks
15%synergy
Metamorphosis Fanatic
13%inclusion5 decks39 decks
8%synergy
Fear of Isolation
13%inclusion5 decks39 decks
13%synergy
Verge Rangers
13%inclusion5 decks39 decks
12%synergy
Auramancer
13%inclusion5 decks39 decks
10%synergy
Heliod, the Radiant Dawn
13%inclusion5 decks39 decks
9%synergy
Stinkweed Imp
13%inclusion5 decks39 decks
13%synergy
Stenn, Paranoid Partisan
10%inclusion4 decks39 decks
9%synergy
Fear of Surveillance
10%inclusion4 decks39 decks
10%synergy
Stitcher's Supplier
10%inclusion4 decks39 decks
10%synergy
Phenomenon Investigators
10%inclusion4 decks39 decks
10%synergy
Burnished Hart
10%inclusion4 decks39 decks
7%synergy
Appendage Amalgam
10%inclusion4 decks39 decks
10%synergy
Ghostly Keybearer
10%inclusion4 decks39 decks
10%synergy
Optimistic Scavenger
7.7%inclusion3 decks39 decks
7%synergy
Dream Eater
7.7%inclusion3 decks39 decks
7%synergy
Overlord of the Balemurk
7.7%inclusion3 decks39 decks
6%synergy
Fear of the Dark
7.7%inclusion3 decks39 decks
7%synergy
Enduring Innocence
7.7%inclusion3 decks39 decks
6%synergy
Enduring Tenacity
7.7%inclusion3 decks39 decks
0%synergy
Spirited Companion
7.7%inclusion3 decks39 decks
6%synergy
Cynical Loner
7.7%inclusion3 decks39 decks
8%synergy
Arvinox, the Mind Flail
7.7%inclusion3 decks39 decks
6%synergy
Enduring Curiosity
7.7%inclusion3 decks39 decks
0%synergy
Deranged Assistant
7.7%inclusion3 decks39 decks
7%synergy
Nashi, Searcher in the Dark
7.7%inclusion3 decks39 decks
7%synergy
Lurrus of the Dream-Den
7.7%inclusion3 decks39 decks
6%synergy
Agent of Erebos
7.7%inclusion3 decks39 decks
7%synergy
Nightmare Shepherd
7.7%inclusion3 decks39 decks
5%synergy
Abdel Adrian, Gorion's Ward
7.7%inclusion3 decks39 decks
6%synergy
Hydroelectric Specimen
7.7%inclusion3 decks39 decks
5%synergy
Instants
Arcane Denial
31%inclusion12 decks39 decks
10%synergy
Thirst for Meaning
23%inclusion9 decks39 decks
22%synergy
Otherworldly Gaze
23%inclusion9 decks39 decks
21%synergy
Counterspell
23%inclusion9 decks39 decks
-18%synergy
Inkshield
23%inclusion9 decks39 decks
14%synergy
Brainstorm
21%inclusion8 decks39 decks
3%synergy
Frantic Search
18%inclusion7 decks39 decks
1%synergy
Utter End
18%inclusion7 decks39 decks
11%synergy
Path to Exile
18%inclusion7 decks39 decks
-24%synergy
Return to Dust
15%inclusion6 decks39 decks
12%synergy
Negate
15%inclusion6 decks39 decks
-1%synergy
Void Rend
15%inclusion6 decks39 decks
-18%synergy
Fact or Fiction
13%inclusion5 decks39 decks
9%synergy
Get Out
10%inclusion4 decks39 decks
10%synergy
Muddle the Mixture
7.7%inclusion3 decks39 decks
4%synergy
Telling Time
7.7%inclusion3 decks39 decks
5%synergy
Dovin's Veto
7.7%inclusion3 decks39 decks
-17%synergy
Sublime Epiphany
7.7%inclusion3 decks39 decks
5%synergy
Reality Shift
7.7%inclusion3 decks39 decks
6%synergy
Thought Scour
7.7%inclusion3 decks39 decks
7%synergy
Stroke of Midnight
7.7%inclusion3 decks39 decks
0%synergy
Dark Ritual
7.7%inclusion3 decks39 decks
-11%synergy
Don't Make a Sound
7.7%inclusion3 decks39 decks
7%synergy
Murder
7.7%inclusion3 decks39 decks
6%synergy
An Offer You Can't Refuse
5.1%inclusion2 decks39 decks
-21%synergy
Run Away Together
5.1%inclusion2 decks39 decks
5%synergy
Confounding Riddle
5.1%inclusion2 decks39 decks
5%synergy
Loran's Escape
5.1%inclusion2 decks39 decks
5%synergy
Refute
5.1%inclusion2 decks39 decks
2%synergy
Cancel
5.1%inclusion2 decks39 decks
4%synergy
Thraben Charm
5.1%inclusion2 decks39 decks
5%synergy
Sink into Stupor
5.1%inclusion2 decks39 decks
-7%synergy
Neutralize
5.1%inclusion2 decks39 decks
4%synergy
Twist Reality
5.1%inclusion2 decks39 decks
5%synergy
Slip Out the Back
5.1%inclusion2 decks39 decks
4%synergy
Perplex
5.1%inclusion2 decks39 decks
4%synergy
Jwari Disruption
5.1%inclusion2 decks39 decks
4%synergy
Delay
5.1%inclusion2 decks39 decks
3%synergy
Glimmerburst
5.1%inclusion2 decks39 decks
5%synergy
Shore Up
5.1%inclusion2 decks39 decks
5%synergy
Sorceries
Sevinne's Reclamation
28%inclusion11 decks39 decks
19%synergy
Time Wipe
26%inclusion10 decks39 decks
18%synergy
Extinguish All Hope
23%inclusion9 decks39 decks
21%synergy
Read the Bones
15%inclusion6 decks39 decks
11%synergy
Dance of the Manse
15%inclusion6 decks39 decks
12%synergy
Singularity Rupture
14%inclusion3 decks22 decks
11%synergy
Ponder
13%inclusion5 decks39 decks
4%synergy
Resurgent Belief
13%inclusion5 decks39 decks
11%synergy
Terminus
10%inclusion4 decks39 decks
6%synergy
Open the Vaults
10%inclusion4 decks39 decks
9%synergy
Diabolic Vision
10%inclusion4 decks39 decks
8%synergy
Brilliant Restoration
10%inclusion4 decks39 decks
8%synergy
Aminatou's Augury
10%inclusion4 decks39 decks
9%synergy
Glimpse the Unthinkable
10%inclusion4 decks39 decks
10%synergy
Buried Alive
10%inclusion4 decks39 decks
6%synergy
Lively Dirge
7.7%inclusion3 decks39 decks
6%synergy
Demonic Counsel
7.7%inclusion3 decks39 decks
7%synergy
Winds of Rath
7.7%inclusion3 decks39 decks
5%synergy
Final Vengeance
7.7%inclusion3 decks39 decks
7%synergy
Traumatize
7.7%inclusion3 decks39 decks
7%synergy
Back for Seconds
7.7%inclusion3 decks39 decks
8%synergy
Windfall
5.1%inclusion2 decks39 decks
-9%synergy
Come Back Wrong
5.1%inclusion2 decks39 decks
5%synergy
Open the Armory
5.1%inclusion2 decks39 decks
2%synergy
Diabolic Tutor
5.1%inclusion2 decks39 decks
0%synergy
Ondu Inversion
5.1%inclusion2 decks39 decks
4%synergy
Split Up
5.1%inclusion2 decks39 decks
4%synergy
Reanimate
5.1%inclusion2 decks39 decks
-11%synergy
Portent
5.1%inclusion2 decks39 decks
2%synergy
Cleansing Meditation
5.1%inclusion2 decks39 decks
5%synergy
Entreat the Angels
5.1%inclusion2 decks39 decks
3%synergy
Inspiration from Beyond
5.1%inclusion2 decks39 decks
5%synergy
Utility Artifacts
Keys to the House
15%inclusion6 decks39 decks
15%synergy
Cloud Key
13%inclusion5 decks39 decks
10%synergy
Whip of Erebos
10%inclusion4 decks39 decks
8%synergy
Perpetual Timepiece
7.7%inclusion3 decks39 decks
7%synergy
Bagel and Schmear
6.7%inclusion1 decks15 decks
7%synergy
Wayfarer's Bauble
5.1%inclusion2 decks39 decks
-3%synergy
Skeleton Key
5.1%inclusion2 decks39 decks
5%synergy
Mask of the Schemer
5.1%inclusion2 decks39 decks
4%synergy
Mystery Key
5.1%inclusion2 decks39 decks
5%synergy
Swiftfoot Boots
5.1%inclusion2 decks39 decks
-19%synergy
Lightning Greaves
5.1%inclusion2 decks39 decks
-17%synergy
Bident of Thassa
5.1%inclusion2 decks39 decks
-4%synergy
Heirloom Mirror
5.1%inclusion2 decks39 decks
5%synergy
Enchantments
Ripples of Undeath
33%inclusion13 decks39 decks
31%synergy
The Tale of Tamiyo
33%inclusion13 decks39 decks
33%synergy
Amphibian Downpour
33%inclusion13 decks39 decks
29%synergy
Bottomless Pool // Locker Room
33%inclusion13 decks39 decks
31%synergy
Grasp of Fate
31%inclusion12 decks39 decks
25%synergy
Seal of Cleansing
31%inclusion12 decks39 decks
29%synergy
Central Elevator // Promising Stairs
31%inclusion12 decks39 decks
30%synergy
Timely Ward
28%inclusion11 decks39 decks
23%synergy
Restricted Office // Lecture Hall
28%inclusion11 decks39 decks
26%synergy
Dress Down
28%inclusion11 decks39 decks
26%synergy
The Eldest Reborn
28%inclusion11 decks39 decks
26%synergy
Ethereal Armor
28%inclusion11 decks39 decks
23%synergy
All That Glitters
28%inclusion11 decks39 decks
19%synergy
Cramped Vents // Access Maze
26%inclusion10 decks39 decks
23%synergy
Estrid's Invocation
26%inclusion10 decks39 decks
21%synergy
Monologue Tax
26%inclusion10 decks39 decks
19%synergy
Defiled Crypt // Cadaver Lab
26%inclusion10 decks39 decks
25%synergy
One with the Multiverse
23%inclusion9 decks39 decks
18%synergy
Derelict Attic // Widow's Walk
23%inclusion9 decks39 decks
23%synergy
Stillness in Motion
21%inclusion7 decks34 decks
20%synergy
Cacophony Unleashed
21%inclusion8 decks39 decks
19%synergy
Extravagant Replication
21%inclusion8 decks39 decks
15%synergy
Seal of Removal
21%inclusion8 decks39 decks
20%synergy
Meat Locker // Drowned Diner
18%inclusion7 decks39 decks
17%synergy
Animate Dead
18%inclusion7 decks39 decks
8%synergy
Nowhere to Run
18%inclusion7 decks39 decks
17%synergy
Propaganda
18%inclusion7 decks39 decks
-8%synergy
Search for Azcanta
18%inclusion7 decks39 decks
17%synergy
Cast Out
18%inclusion7 decks39 decks
15%synergy
Surgical Suite // Hospital Room
18%inclusion7 decks39 decks
18%synergy
Shark Typhoon
18%inclusion7 decks39 decks
12%synergy
Unholy Annex // Ritual Chamber
18%inclusion7 decks39 decks
17%synergy
Polluted Cistern // Dim Oubliette
18%inclusion7 decks39 decks
17%synergy
Darksteel Mutation
15%inclusion6 decks39 decks
9%synergy
Underwater Tunnel // Slimy Aquarium
15%inclusion6 decks39 decks
15%synergy
Utter Insignificance
15%inclusion6 decks39 decks
15%synergy
Life Insurance
15%inclusion6 decks39 decks
14%synergy
Soul Snare
15%inclusion6 decks39 decks
15%synergy
Witness Protection
15%inclusion6 decks39 decks
13%synergy
Imprisoned in the Moon
13%inclusion5 decks39 decks
6%synergy
Grievous Wound
13%inclusion5 decks39 decks
12%synergy
Necromancy
13%inclusion5 decks39 decks
8%synergy
Copy Enchantment
13%inclusion5 decks39 decks
8%synergy
Mystic Remora
13%inclusion5 decks39 decks
-9%synergy
Secrets of the Dead
13%inclusion5 decks39 decks
13%synergy
Dazzling Theater // Prop Room
13%inclusion5 decks39 decks
11%synergy
Chronic Flooding
13%inclusion5 decks39 decks
13%synergy
Mirror Room // Fractured Realm
13%inclusion5 decks39 decks
10%synergy
Ballad of the Black Flag
13%inclusion5 decks39 decks
12%synergy
Touch the Spirit Realm
13%inclusion5 decks39 decks
10%synergy
Battles
Invasion of Theros
7.7%inclusion3 decks39 decks
6%synergy
Utility Lands
Hall of Heliod's Generosity
51%inclusion20 decks39 decks
38%synergy
Bojuka Bog
38%inclusion15 decks39 decks
11%synergy
Halimar Depths
21%inclusion8 decks39 decks
16%synergy
Reliquary Tower
10%inclusion4 decks39 decks
-23%synergy
Dakmor Salvage
10%inclusion4 decks39 decks
10%synergy
Pit of Offerings
5.1%inclusion2 decks39 decks
5%synergy
Hostile Hostel
5.1%inclusion2 decks39 decks
5%synergy
Creeping Tar Pit
5.1%inclusion2 decks39 decks
4%synergy
Celestial Colonnade
5.1%inclusion2 decks39 decks
4%synergy
Restless Anchorage
5.1%inclusion2 decks39 decks
4%synergy
Arid Archway
5.1%inclusion2 decks39 decks
5%synergy
Temple of the False God
5.1%inclusion2 decks39 decks
-3%synergy
Vault of the Archangel
5.1%inclusion2 decks39 decks
-1%synergy
Guildless Commons
5.1%inclusion2 decks39 decks
5%synergy
Cephalid Coliseum
5.1%inclusion2 decks39 decks
2%synergy
Rogue's Passage
5.1%inclusion2 decks39 decks
-4%synergy
Mana Artifacts
Arcane Signet
74%inclusion29 decks39 decks
-14%synergy
Sol Ring
72%inclusion28 decks39 decks
-18%synergy
Orzhov Signet
54%inclusion21 decks39 decks
19%synergy
Azorius Signet
51%inclusion20 decks39 decks
18%synergy
Talisman of Progress
28%inclusion11 decks39 decks
-14%synergy
Talisman of Dominance
28%inclusion11 decks39 decks
-21%synergy
Fellwar Stone
28%inclusion11 decks39 decks
-6%synergy
Dimir Signet
28%inclusion11 decks39 decks
-5%synergy
Talisman of Hierarchy
26%inclusion10 decks39 decks
-17%synergy
Mind Stone
26%inclusion10 decks39 decks
12%synergy
Commander's Sphere
15%inclusion6 decks39 decks
-4%synergy
Chromatic Lantern
7.7%inclusion3 decks39 decks
-6%synergy
Sky Diamond
7.7%inclusion3 decks39 decks
6%synergy
Marble Diamond
7.7%inclusion3 decks39 decks
6%synergy
Charcoal Diamond
5.1%inclusion2 decks39 decks
4%synergy
Hourglass of the Lost
5.1%inclusion2 decks39 decks
5%synergy
Lands
Swamp
100%inclusion39 decks39 decks
9%synergy
Island
100%inclusion39 decks39 decks
7%synergy
Plains
100%inclusion39 decks39 decks
9%synergy
Command Tower
87%inclusion34 decks39 decks
-5%synergy
Arcane Sanctum
74%inclusion29 decks39 decks
20%synergy
Caves of Koilos
67%inclusion26 decks39 decks
31%synergy
Adarkar Wastes
51%inclusion20 decks39 decks
21%synergy
Dimir Aqueduct
46%inclusion18 decks39 decks
32%synergy
Temple of Enlightenment
46%inclusion18 decks39 decks
29%synergy
Azorius Chancery
44%inclusion17 decks39 decks
29%synergy
Exotic Orchard
44%inclusion17 decks39 decks
-15%synergy
Terramorphic Expanse
44%inclusion17 decks39 decks
26%synergy
Orzhov Basilica
44%inclusion17 decks39 decks
27%synergy
Temple of Silence
44%inclusion17 decks39 decks
24%synergy
Underground River
41%inclusion16 decks39 decks
9%synergy
Evolving Wilds
41%inclusion16 decks39 decks
16%synergy
Sunken Hollow
41%inclusion16 decks39 decks
1%synergy
Prairie Stream
38%inclusion15 decks39 decks
-2%synergy
Isolated Chapel
36%inclusion14 decks39 decks
-2%synergy
Temple of Deceit
36%inclusion14 decks39 decks
17%synergy
Obscura Storefront
33%inclusion13 decks39 decks
23%synergy
Skycloud Expanse
31%inclusion12 decks39 decks
16%synergy
Glacial Fortress
28%inclusion11 decks39 decks
-11%synergy
Contaminated Landscape
28%inclusion11 decks39 decks
13%synergy
Darkwater Catacombs
28%inclusion11 decks39 decks
14%synergy
Ash Barrens
28%inclusion11 decks39 decks
17%synergy
Tainted Field
26%inclusion10 decks39 decks
19%synergy
Thriving Heath
26%inclusion10 decks39 decks
21%synergy
Tainted Isle
23%inclusion9 decks39 decks
17%synergy
Thriving Isle
23%inclusion9 decks39 decks
18%synergy
Port Town
21%inclusion8 decks39 decks
4%synergy
Thriving Moor
21%inclusion8 decks39 decks
16%synergy
Valgavoth's Lair
21%inclusion8 decks39 decks
18%synergy
Myriad Landscape
18%inclusion7 decks39 decks
9%synergy
Fetid Heath
18%inclusion7 decks39 decks
7%synergy
Path of Ancestry
18%inclusion7 decks39 decks
-9%synergy
Idyllic Beachfront
15%inclusion6 decks39 decks
12%synergy
Drowned Catacomb
15%inclusion6 decks39 decks
-19%synergy
Shineshadow Snarl
15%inclusion6 decks39 decks
5%synergy
Choked Estuary
15%inclusion6 decks39 decks
-1%synergy
Desolate Mire
13%inclusion5 decks39 decks
7%synergy
Sunlit Marsh
13%inclusion5 decks39 decks
9%synergy
Abandoned Campground
10%inclusion4 decks39 decks
10%synergy
Irrigated Farmland
10%inclusion4 decks39 decks
3%synergy
Tranquil Cove
10%inclusion4 decks39 decks
4%synergy
Concealed Courtyard
10%inclusion4 decks39 decks
6%synergy
Mystic Gate
10%inclusion4 decks39 decks
5%synergy
Scoured Barrens
10%inclusion4 decks39 decks
4%synergy
Floodfarm Verge
10%inclusion4 decks39 decks
-1%synergy
Fetid Pools
7.7%inclusion3 decks39 decks
1%synergy
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