The Master of Keys (Commander) - Budget Upgraded

The Master of Keys
Rank #315
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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
Mana Artifacts
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Fear of Sleep Paralysis
65%inclusion26 decks40 decks
59%synergy
Demon of Fate's Design
63%inclusion25 decks40 decks
57%synergy
Doomwake Giant
63%inclusion25 decks40 decks
57%synergy
Mesa Enchantress
65%inclusion26 decks40 decks
56%synergy
Starfield Mystic
63%inclusion25 decks40 decks
56%synergy
Inquisitive Glimmer
63%inclusion25 decks40 decks
55%synergy
Secret Arcade // Dusty Parlor
53%inclusion21 decks40 decks
47%synergy
Scrabbling Skullcrab
48%inclusion19 decks40 decks
46%synergy
Entity Tracker
53%inclusion21 decks40 decks
46%synergy
Gravebreaker Lamia
45%inclusion18 decks40 decks
44%synergy
Top Cards
Sigil of the Empty Throne
48%inclusion19 decks40 decks
42%synergy
Sphere of Safety
48%inclusion19 decks40 decks
38%synergy
Fear of Impostors
45%inclusion18 decks40 decks
43%synergy
Mirrormade
45%inclusion18 decks40 decks
35%synergy
Victor, Valgavoth's Seneschal
45%inclusion18 decks40 decks
43%synergy
Moon-Blessed Cleric
43%inclusion17 decks40 decks
38%synergy
Swords to Plowshares
43%inclusion17 decks40 decks
-26%synergy
Ghostly Dancers
40%inclusion16 decks40 decks
37%synergy
Redress Fate
40%inclusion16 decks40 decks
34%synergy
Cemetery Tampering
38%inclusion15 decks40 decks
37%synergy
Creatures
Ondu Spiritdancer
38%inclusion15 decks40 decks
31%synergy
Soaring Lightbringer
33%inclusion13 decks40 decks
27%synergy
Archetype of Imagination
30%inclusion12 decks40 decks
25%synergy
Alseid of Life's Bounty
28%inclusion11 decks40 decks
26%synergy
Silent Hallcreeper
28%inclusion11 decks40 decks
23%synergy
Aminatou, Veil Piercer
28%inclusion11 decks40 decks
26%synergy
Zur the Enchanter
25%inclusion10 decks40 decks
20%synergy
Archon of Sun's Grace
25%inclusion10 decks40 decks
20%synergy
Athreos, Shroud-Veiled
23%inclusion9 decks40 decks
18%synergy
Zur, Eternal Schemer
23%inclusion9 decks40 decks
19%synergy
Mindwrack Harpy
20%inclusion8 decks40 decks
20%synergy
Fear of Infinity
18%inclusion7 decks40 decks
17%synergy
Gremlin Tamer
18%inclusion7 decks40 decks
16%synergy
Ancient Cellarspawn
18%inclusion7 decks40 decks
14%synergy
Grim Guardian
18%inclusion7 decks40 decks
15%synergy
Solemn Simulacrum
18%inclusion7 decks40 decks
2%synergy
Sage of Mysteries
15%inclusion6 decks40 decks
15%synergy
Skullsnap Nuisance
15%inclusion6 decks40 decks
15%synergy
Overlord of the Floodpits
15%inclusion6 decks40 decks
11%synergy
Balemurk Leech
15%inclusion6 decks40 decks
14%synergy
Fear of Isolation
15%inclusion6 decks40 decks
15%synergy
Metamorphosis Fanatic
13%inclusion5 decks40 decks
8%synergy
Heliod, the Radiant Dawn
13%inclusion5 decks40 decks
9%synergy
Optimistic Scavenger
13%inclusion5 decks40 decks
12%synergy
Stinkweed Imp
13%inclusion5 decks40 decks
12%synergy
Creeping Peeper
13%inclusion5 decks40 decks
12%synergy
Verge Rangers
13%inclusion5 decks40 decks
11%synergy
Auramancer
13%inclusion5 decks40 decks
9%synergy
Phenomenon Investigators
13%inclusion5 decks40 decks
12%synergy
Stitcher's Supplier
10%inclusion4 decks40 decks
9%synergy
Arvinox, the Mind Flail
10%inclusion4 decks40 decks
8%synergy
Ghostly Keybearer
10%inclusion4 decks40 decks
10%synergy
Deranged Assistant
10%inclusion4 decks40 decks
10%synergy
Appendage Amalgam
10%inclusion4 decks40 decks
10%synergy
Stenn, Paranoid Partisan
10%inclusion4 decks40 decks
9%synergy
Fear of Surveillance
10%inclusion4 decks40 decks
10%synergy
Boggart Trawler
10%inclusion4 decks40 decks
7%synergy
Burnished Hart
10%inclusion4 decks40 decks
6%synergy
Enduring Curiosity
10%inclusion4 decks40 decks
2%synergy
Jill, Shiva's Dominant
7.7%inclusion2 decks26 decks
7%synergy
Summon: Anima
7.7%inclusion2 decks26 decks
7%synergy
Emet-Selch of the Third Seat
7.7%inclusion2 decks26 decks
-2%synergy
Summon: Primal Garuda
7.7%inclusion2 decks26 decks
8%synergy
Baleful Eidolon
7.5%inclusion3 decks40 decks
7%synergy
Fear of Failed Tests
7.5%inclusion3 decks40 decks
7%synergy
Lurrus of the Dream-Den
7.5%inclusion3 decks40 decks
6%synergy
Fate Unraveler
7.5%inclusion3 decks40 decks
7%synergy
Enduring Tenacity
7.5%inclusion3 decks40 decks
0%synergy
Pearl-Ear, Imperial Advisor
7.5%inclusion3 decks40 decks
6%synergy
Nightmare Shepherd
7.5%inclusion3 decks40 decks
5%synergy
Instants
Arcane Denial
33%inclusion13 decks40 decks
12%synergy
Inkshield
25%inclusion10 decks40 decks
16%synergy
Thirst for Meaning
25%inclusion10 decks40 decks
23%synergy
Brainstorm
23%inclusion9 decks40 decks
5%synergy
Counterspell
23%inclusion9 decks40 decks
-19%synergy
Utter End
20%inclusion8 decks40 decks
13%synergy
Otherworldly Gaze
20%inclusion8 decks40 decks
18%synergy
Path to Exile
18%inclusion7 decks40 decks
-24%synergy
Frantic Search
18%inclusion7 decks40 decks
1%synergy
Negate
15%inclusion6 decks40 decks
-2%synergy
Get Out
15%inclusion6 decks40 decks
15%synergy
Return to Dust
15%inclusion6 decks40 decks
11%synergy
Void Rend
13%inclusion5 decks40 decks
-21%synergy
Fact or Fiction
10%inclusion4 decks40 decks
6%synergy
Telling Time
10%inclusion4 decks40 decks
8%synergy
Dark Ritual
7.5%inclusion3 decks40 decks
-12%synergy
Sublime Epiphany
7.5%inclusion3 decks40 decks
5%synergy
Muddle the Mixture
7.5%inclusion3 decks40 decks
3%synergy
Dovin's Veto
7.5%inclusion3 decks40 decks
-17%synergy
Reality Shift
7.5%inclusion3 decks40 decks
6%synergy
Don't Make a Sound
7.5%inclusion3 decks40 decks
7%synergy
Murder
7.5%inclusion3 decks40 decks
6%synergy
Stroke of Midnight
7.5%inclusion3 decks40 decks
0%synergy
Loran's Escape
5.0%inclusion2 decks40 decks
5%synergy
Run Away Together
5.0%inclusion2 decks40 decks
5%synergy
Confounding Riddle
5.0%inclusion2 decks40 decks
5%synergy
Twist Reality
5.0%inclusion2 decks40 decks
5%synergy
Perplex
5.0%inclusion2 decks40 decks
4%synergy
Glimmerburst
5.0%inclusion2 decks40 decks
4%synergy
Shore Up
5.0%inclusion2 decks40 decks
5%synergy
Karametra's Blessing
5.0%inclusion2 decks40 decks
5%synergy
An Offer You Can't Refuse
5.0%inclusion2 decks40 decks
-21%synergy
Refute
5.0%inclusion2 decks40 decks
2%synergy
Thraben Charm
5.0%inclusion2 decks40 decks
4%synergy
Thought Scour
5.0%inclusion2 decks40 decks
4%synergy
Sink into Stupor
5.0%inclusion2 decks40 decks
-8%synergy
Cancel
5.0%inclusion2 decks40 decks
4%synergy
Slip Out the Back
5.0%inclusion2 decks40 decks
4%synergy
Jwari Disruption
5.0%inclusion2 decks40 decks
4%synergy
Delay
5.0%inclusion2 decks40 decks
3%synergy
Neutralize
5.0%inclusion2 decks40 decks
4%synergy
Sorceries
Sevinne's Reclamation
30%inclusion12 decks40 decks
21%synergy
Time Wipe
25%inclusion10 decks40 decks
18%synergy
Extinguish All Hope
20%inclusion8 decks40 decks
18%synergy
Ponder
15%inclusion6 decks40 decks
6%synergy
Read the Bones
15%inclusion6 decks40 decks
11%synergy
Dance of the Manse
15%inclusion6 decks40 decks
11%synergy
Singularity Rupture
14%inclusion3 decks22 decks
11%synergy
Aminatou's Augury
13%inclusion5 decks40 decks
11%synergy
Terminus
13%inclusion5 decks40 decks
8%synergy
Diabolic Vision
13%inclusion5 decks40 decks
10%synergy
Resurgent Belief
10%inclusion4 decks40 decks
8%synergy
Open the Vaults
10%inclusion4 decks40 decks
9%synergy
Brilliant Restoration
10%inclusion4 decks40 decks
8%synergy
Demonic Counsel
10%inclusion4 decks40 decks
9%synergy
Buried Alive
10%inclusion4 decks40 decks
6%synergy
Glimpse the Unthinkable
7.5%inclusion3 decks40 decks
7%synergy
Windfall
7.5%inclusion3 decks40 decks
-6%synergy
Lively Dirge
7.5%inclusion3 decks40 decks
6%synergy
Winds of Rath
7.5%inclusion3 decks40 decks
5%synergy
Final Vengeance
7.5%inclusion3 decks40 decks
7%synergy
Back for Seconds
7.5%inclusion3 decks40 decks
7%synergy
Come Back Wrong
5.0%inclusion2 decks40 decks
5%synergy
Entreat the Angels
5.0%inclusion2 decks40 decks
3%synergy
Inspiration from Beyond
5.0%inclusion2 decks40 decks
5%synergy
Traumatize
5.0%inclusion2 decks40 decks
5%synergy
Portent
5.0%inclusion2 decks40 decks
1%synergy
Diabolic Tutor
5.0%inclusion2 decks40 decks
0%synergy
Open the Armory
5.0%inclusion2 decks40 decks
2%synergy
Cleansing Meditation
5.0%inclusion2 decks40 decks
5%synergy
Ondu Inversion
5.0%inclusion2 decks40 decks
4%synergy
Split Up
5.0%inclusion2 decks40 decks
4%synergy
Utility Artifacts
Cloud Key
15%inclusion6 decks40 decks
12%synergy
Keys to the House
15%inclusion6 decks40 decks
15%synergy
Whip of Erebos
10%inclusion4 decks40 decks
8%synergy
Perpetual Timepiece
7.5%inclusion3 decks40 decks
7%synergy
Swiftfoot Boots
7.5%inclusion3 decks40 decks
-16%synergy
Bagel and Schmear
6.3%inclusion1 decks16 decks
6%synergy
Mystery Key
5.0%inclusion2 decks40 decks
5%synergy
Skeleton Key
5.0%inclusion2 decks40 decks
5%synergy
Mask of the Schemer
5.0%inclusion2 decks40 decks
4%synergy
Heirloom Mirror
5.0%inclusion2 decks40 decks
5%synergy
Lightning Greaves
5.0%inclusion2 decks40 decks
-17%synergy
Wayfarer's Bauble
5.0%inclusion2 decks40 decks
-3%synergy
Enchantments
Amphibian Downpour
35%inclusion14 decks40 decks
30%synergy
Ripples of Undeath
35%inclusion14 decks40 decks
32%synergy
Bottomless Pool // Locker Room
35%inclusion14 decks40 decks
33%synergy
Seal of Cleansing
35%inclusion14 decks40 decks
33%synergy
Timely Ward
33%inclusion13 decks40 decks
28%synergy
Grasp of Fate
33%inclusion13 decks40 decks
26%synergy
Central Elevator // Promising Stairs
33%inclusion13 decks40 decks
32%synergy
The Tale of Tamiyo
30%inclusion12 decks40 decks
30%synergy
Restricted Office // Lecture Hall
30%inclusion12 decks40 decks
28%synergy
Dress Down
30%inclusion12 decks40 decks
27%synergy
The Eldest Reborn
30%inclusion12 decks40 decks
27%synergy
Defiled Crypt // Cadaver Lab
28%inclusion11 decks40 decks
27%synergy
Monologue Tax
28%inclusion11 decks40 decks
21%synergy
Ethereal Armor
28%inclusion11 decks40 decks
23%synergy
Cramped Vents // Access Maze
25%inclusion10 decks40 decks
22%synergy
Cacophony Unleashed
25%inclusion10 decks40 decks
23%synergy
All That Glitters
25%inclusion10 decks40 decks
16%synergy
Stillness in Motion
23%inclusion8 decks35 decks
22%synergy
Estrid's Invocation
23%inclusion9 decks40 decks
18%synergy
Search for Azcanta
23%inclusion9 decks40 decks
21%synergy
Utter Insignificance
23%inclusion9 decks40 decks
22%synergy
Derelict Attic // Widow's Walk
23%inclusion9 decks40 decks
22%synergy
Nowhere to Run
23%inclusion9 decks40 decks
21%synergy
Cast Out
23%inclusion9 decks40 decks
20%synergy
One with the Multiverse
23%inclusion9 decks40 decks
18%synergy
Extravagant Replication
23%inclusion9 decks40 decks
17%synergy
Seal of Removal
23%inclusion9 decks40 decks
22%synergy
Shark Typhoon
20%inclusion8 decks40 decks
14%synergy
Unholy Annex // Ritual Chamber
20%inclusion8 decks40 decks
19%synergy
Polluted Cistern // Dim Oubliette
20%inclusion8 decks40 decks
19%synergy
Chronic Flooding
18%inclusion7 decks40 decks
17%synergy
Propaganda
18%inclusion7 decks40 decks
-9%synergy
Meat Locker // Drowned Diner
18%inclusion7 decks40 decks
17%synergy
Surgical Suite // Hospital Room
18%inclusion7 decks40 decks
17%synergy
Darksteel Mutation
15%inclusion6 decks40 decks
9%synergy
Soul Snare
15%inclusion6 decks40 decks
15%synergy
Secrets of the Dead
15%inclusion6 decks40 decks
15%synergy
Curator's Ward
15%inclusion6 decks40 decks
12%synergy
Underwater Tunnel // Slimy Aquarium
15%inclusion6 decks40 decks
15%synergy
Grievous Wound
15%inclusion6 decks40 decks
14%synergy
Animate Dead
15%inclusion6 decks40 decks
5%synergy
Imprisoned in the Moon
13%inclusion5 decks40 decks
6%synergy
Life Insurance
13%inclusion5 decks40 decks
11%synergy
Witness Protection
13%inclusion5 decks40 decks
11%synergy
Dazzling Theater // Prop Room
13%inclusion5 decks40 decks
11%synergy
Funeral Room // Awakening Hall
13%inclusion5 decks40 decks
12%synergy
Court of Ardenvale
13%inclusion5 decks40 decks
12%synergy
Court of Cunning
13%inclusion5 decks40 decks
11%synergy
Mystic Remora
13%inclusion5 decks40 decks
-9%synergy
Eaten by Piranhas
13%inclusion5 decks40 decks
11%synergy
Battles
Invasion of Theros
7.5%inclusion3 decks40 decks
6%synergy
Utility Lands
Hall of Heliod's Generosity
50%inclusion20 decks40 decks
37%synergy
Bojuka Bog
40%inclusion16 decks40 decks
13%synergy
Halimar Depths
23%inclusion9 decks40 decks
18%synergy
Reliquary Tower
10%inclusion4 decks40 decks
-24%synergy
Dakmor Salvage
10%inclusion4 decks40 decks
10%synergy
Arid Archway
5.0%inclusion2 decks40 decks
5%synergy
Guildless Commons
5.0%inclusion2 decks40 decks
5%synergy
Vault of the Archangel
5.0%inclusion2 decks40 decks
-1%synergy
Pit of Offerings
5.0%inclusion2 decks40 decks
5%synergy
Hostile Hostel
5.0%inclusion2 decks40 decks
5%synergy
Creeping Tar Pit
5.0%inclusion2 decks40 decks
3%synergy
Restless Anchorage
5.0%inclusion2 decks40 decks
4%synergy
Cephalid Coliseum
5.0%inclusion2 decks40 decks
1%synergy
Temple of the False God
5.0%inclusion2 decks40 decks
-3%synergy
Rogue's Passage
5.0%inclusion2 decks40 decks
-4%synergy
Mana Artifacts
Arcane Signet
75%inclusion30 decks40 decks
-13%synergy
Sol Ring
73%inclusion29 decks40 decks
-17%synergy
Orzhov Signet
57%inclusion23 decks40 decks
23%synergy
Azorius Signet
53%inclusion21 decks40 decks
20%synergy
Mind Stone
28%inclusion11 decks40 decks
14%synergy
Talisman of Dominance
25%inclusion10 decks40 decks
-24%synergy
Dimir Signet
25%inclusion10 decks40 decks
-8%synergy
Fellwar Stone
25%inclusion10 decks40 decks
-9%synergy
Talisman of Progress
25%inclusion10 decks40 decks
-18%synergy
Talisman of Hierarchy
23%inclusion9 decks40 decks
-21%synergy
Commander's Sphere
15%inclusion6 decks40 decks
-4%synergy
Sky Diamond
7.5%inclusion3 decks40 decks
6%synergy
Marble Diamond
7.5%inclusion3 decks40 decks
6%synergy
Hourglass of the Lost
7.5%inclusion3 decks40 decks
7%synergy
Chromatic Lantern
7.5%inclusion3 decks40 decks
-6%synergy
Charcoal Diamond
5.0%inclusion2 decks40 decks
4%synergy
Lands
Swamp
100%inclusion40 decks40 decks
9%synergy
Plains
100%inclusion40 decks40 decks
9%synergy
Island
100%inclusion40 decks40 decks
7%synergy
Command Tower
90%inclusion36 decks40 decks
-2%synergy
Arcane Sanctum
75%inclusion30 decks40 decks
20%synergy
Caves of Koilos
65%inclusion26 decks40 decks
30%synergy
Adarkar Wastes
53%inclusion21 decks40 decks
22%synergy
Azorius Chancery
48%inclusion19 decks40 decks
33%synergy
Dimir Aqueduct
48%inclusion19 decks40 decks
33%synergy
Temple of Enlightenment
48%inclusion19 decks40 decks
31%synergy
Underground River
45%inclusion18 decks40 decks
13%synergy
Temple of Silence
45%inclusion18 decks40 decks
25%synergy
Terramorphic Expanse
45%inclusion18 decks40 decks
28%synergy
Orzhov Basilica
45%inclusion18 decks40 decks
29%synergy
Evolving Wilds
45%inclusion18 decks40 decks
20%synergy
Exotic Orchard
43%inclusion17 decks40 decks
-16%synergy
Prairie Stream
40%inclusion16 decks40 decks
-1%synergy
Obscura Storefront
38%inclusion15 decks40 decks
27%synergy
Temple of Deceit
38%inclusion15 decks40 decks
19%synergy
Sunken Hollow
38%inclusion15 decks40 decks
-2%synergy
Isolated Chapel
35%inclusion14 decks40 decks
-3%synergy
Skycloud Expanse
33%inclusion13 decks40 decks
18%synergy
Darkwater Catacombs
30%inclusion12 decks40 decks
16%synergy
Ash Barrens
30%inclusion12 decks40 decks
19%synergy
Tainted Field
30%inclusion12 decks40 decks
23%synergy
Glacial Fortress
28%inclusion11 decks40 decks
-12%synergy
Contaminated Landscape
28%inclusion11 decks40 decks
13%synergy
Tainted Isle
25%inclusion10 decks40 decks
19%synergy
Thriving Heath
25%inclusion10 decks40 decks
20%synergy
Thriving Isle
25%inclusion10 decks40 decks
20%synergy
Valgavoth's Lair
23%inclusion9 decks40 decks
20%synergy
Myriad Landscape
20%inclusion8 decks40 decks
11%synergy
Thriving Moor
20%inclusion8 decks40 decks
16%synergy
Fetid Heath
18%inclusion7 decks40 decks
6%synergy
Port Town
18%inclusion7 decks40 decks
1%synergy
Drowned Catacomb
18%inclusion7 decks40 decks
-18%synergy
Path of Ancestry
18%inclusion7 decks40 decks
-10%synergy
Desolate Mire
15%inclusion6 decks40 decks
9%synergy
Choked Estuary
15%inclusion6 decks40 decks
-1%synergy
Idyllic Beachfront
13%inclusion5 decks40 decks
9%synergy
Sunlit Marsh
13%inclusion5 decks40 decks
8%synergy
Shineshadow Snarl
13%inclusion5 decks40 decks
2%synergy
Scoured Barrens
10%inclusion4 decks40 decks
3%synergy
Deserted Beach
10%inclusion4 decks40 decks
-11%synergy
Abandoned Campground
10%inclusion4 decks40 decks
9%synergy
Irrigated Farmland
10%inclusion4 decks40 decks
3%synergy
Tranquil Cove
10%inclusion4 decks40 decks
4%synergy
Boggart Trawler
10%inclusion4 decks40 decks
7%synergy
Floodfarm Verge
10%inclusion4 decks40 decks
-1%synergy
Mystic Gate
7.5%inclusion3 decks40 decks
2%synergy
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