The Master of Keys (Commander) - Budget Core

The Master of Keys
Rank #315
36decks
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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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Waterbender Ascension
33%inclusion1 decks3 decks
32%synergy
High Synergy Cards
Mesa Enchantress
78%inclusion28 decks36 decks
69%synergy
Inquisitive Glimmer
67%inclusion24 decks36 decks
59%synergy
Demon of Fate's Design
64%inclusion23 decks36 decks
58%synergy
Doomwake Giant
64%inclusion23 decks36 decks
58%synergy
Scrabbling Skullcrab
58%inclusion21 decks36 decks
57%synergy
Starfield Mystic
64%inclusion23 decks36 decks
57%synergy
Sigil of the Empty Throne
61%inclusion22 decks36 decks
55%synergy
Gravebreaker Lamia
50%inclusion18 decks36 decks
49%synergy
Fear of Sleep Paralysis
53%inclusion19 decks36 decks
47%synergy
Cemetery Tampering
47%inclusion17 decks36 decks
46%synergy
Top Cards
Redress Fate
47%inclusion17 decks36 decks
41%synergy
Entity Tracker
44%inclusion16 decks36 decks
38%synergy
Ondu Spiritdancer
44%inclusion16 decks36 decks
38%synergy
Soaring Lightbringer
42%inclusion15 decks36 decks
37%synergy
Mirrormade
42%inclusion15 decks36 decks
32%synergy
Seal of Cleansing
42%inclusion15 decks36 decks
40%synergy
Time Wipe
42%inclusion15 decks36 decks
34%synergy
The Eldest Reborn
42%inclusion15 decks36 decks
39%synergy
Victor, Valgavoth's Seneschal
39%inclusion14 decks36 decks
37%synergy
Stillness in Motion
38%inclusion5 decks13 decks
38%synergy
Creatures
Moon-Blessed Cleric
36%inclusion13 decks36 decks
31%synergy
Sage of Mysteries
33%inclusion12 decks36 decks
33%synergy
Aminatou, Veil Piercer
33%inclusion12 decks36 decks
32%synergy
Skullsnap Nuisance
31%inclusion11 decks36 decks
30%synergy
Ghostly Dancers
31%inclusion11 decks36 decks
28%synergy
Fear of Impostors
31%inclusion11 decks36 decks
29%synergy
Archetype of Imagination
31%inclusion11 decks36 decks
26%synergy
Alseid of Life's Bounty
28%inclusion10 decks36 decks
26%synergy
Fear of Infinity
25%inclusion9 decks36 decks
24%synergy
Archon of Sun's Grace
25%inclusion9 decks36 decks
20%synergy
Athreos, Shroud-Veiled
25%inclusion9 decks36 decks
21%synergy
Mindwrack Harpy
25%inclusion9 decks36 decks
25%synergy
Auramancer
22%inclusion8 decks36 decks
19%synergy
Solemn Simulacrum
22%inclusion8 decks36 decks
7%synergy
Balemurk Leech
22%inclusion8 decks36 decks
22%synergy
Nightmare Shepherd
22%inclusion8 decks36 decks
20%synergy
Grim Guardian
19%inclusion7 decks36 decks
17%synergy
Heliod, the Radiant Dawn
19%inclusion7 decks36 decks
16%synergy
Fear of Surveillance
19%inclusion7 decks36 decks
19%synergy
Zur the Enchanter
19%inclusion7 decks36 decks
14%synergy
Dream Eater
17%inclusion6 decks36 decks
16%synergy
Silent Hallcreeper
17%inclusion6 decks36 decks
12%synergy
Millikin
17%inclusion6 decks36 decks
16%synergy
Burnished Hart
14%inclusion5 decks36 decks
10%synergy
Gremlin Tamer
14%inclusion5 decks36 decks
13%synergy
Starnheim Courser
14%inclusion5 decks36 decks
10%synergy
Ancient Cellarspawn
14%inclusion5 decks36 decks
11%synergy
Nighthowler
14%inclusion5 decks36 decks
14%synergy
Arvinox, the Mind Flail
14%inclusion5 decks36 decks
12%synergy
Spirited Companion
14%inclusion5 decks36 decks
12%synergy
Fear of Isolation
11%inclusion4 decks36 decks
11%synergy
Overlord of the Floodpits
11%inclusion4 decks36 decks
7%synergy
Stitcher's Supplier
11%inclusion4 decks36 decks
10%synergy
Appendage Amalgam
11%inclusion4 decks36 decks
11%synergy
Phenomenon Investigators
11%inclusion4 decks36 decks
10%synergy
Metamorphosis Fanatic
11%inclusion4 decks36 decks
6%synergy
Fear of Lost Teeth
11%inclusion4 decks36 decks
11%synergy
Fear of the Dark
11%inclusion4 decks36 decks
11%synergy
Prognostic Sphinx
11%inclusion4 decks36 decks
10%synergy
Sun Titan
11%inclusion4 decks36 decks
2%synergy
Ajani's Chosen
8.3%inclusion3 decks36 decks
8%synergy
Nashi, Searcher in the Dark
8.3%inclusion3 decks36 decks
8%synergy
Summon: Yojimbo
8.3%inclusion1 decks12 decks
7%synergy
Brain Maggot
8.3%inclusion3 decks36 decks
8%synergy
The Warring Triad
8.3%inclusion1 decks12 decks
8%synergy
Ashiok's Reaper
8.3%inclusion3 decks36 decks
8%synergy
Deranged Assistant
8.3%inclusion3 decks36 decks
8%synergy
Indebted Spirit
8.3%inclusion3 decks36 decks
8%synergy
Zur, Eternal Schemer
8.3%inclusion3 decks36 decks
5%synergy
Optimistic Scavenger
5.6%inclusion2 decks36 decks
5%synergy
Instants
Swords to Plowshares
36%inclusion13 decks36 decks
-32%synergy
Otherworldly Gaze
33%inclusion12 decks36 decks
31%synergy
Thirst for Meaning
31%inclusion11 decks36 decks
29%synergy
Path to Exile
28%inclusion10 decks36 decks
-14%synergy
Negate
25%inclusion9 decks36 decks
8%synergy
Fact or Fiction
25%inclusion9 decks36 decks
21%synergy
Arcane Denial
22%inclusion8 decks36 decks
2%synergy
Void Rend
22%inclusion8 decks36 decks
-11%synergy
Return to Dust
19%inclusion7 decks36 decks
16%synergy
Utter End
19%inclusion7 decks36 decks
12%synergy
Inkshield
17%inclusion6 decks36 decks
8%synergy
Telling Time
14%inclusion5 decks36 decks
12%synergy
Brainstorm
14%inclusion5 decks36 decks
-3%synergy
Rowan's Grim Search
14%inclusion5 decks36 decks
14%synergy
Frantic Search
11%inclusion4 decks36 decks
-6%synergy
An Offer You Can't Refuse
11%inclusion4 decks36 decks
-15%synergy
Counterspell
8.3%inclusion3 decks36 decks
-33%synergy
Forbidden Alchemy
8.3%inclusion3 decks36 decks
7%synergy
Unwanted Remake
8.3%inclusion3 decks36 decks
8%synergy
Refute
6.1%inclusion2 decks33 decks
3%synergy
Defabricate
5.6%inclusion2 decks36 decks
5%synergy
Opt
5.6%inclusion2 decks36 decks
2%synergy
Generous Gift
5.6%inclusion2 decks36 decks
-9%synergy
Thought Scour
5.6%inclusion2 decks36 decks
4%synergy
Sinister Sabotage
5.6%inclusion2 decks36 decks
5%synergy
Final Payment
5.6%inclusion2 decks36 decks
5%synergy
Argivian Find
5.6%inclusion2 decks36 decks
5%synergy
Live or Die
5.6%inclusion2 decks36 decks
5%synergy
Sorceries
Sevinne's Reclamation
28%inclusion10 decks36 decks
19%synergy
Extinguish All Hope
19%inclusion7 decks36 decks
18%synergy
Read the Bones
19%inclusion7 decks36 decks
15%synergy
Dance of the Manse
17%inclusion6 decks36 decks
13%synergy
Resurgent Belief
17%inclusion6 decks36 decks
14%synergy
Terminus
14%inclusion5 decks36 decks
10%synergy
Entreat the Angels
14%inclusion5 decks36 decks
12%synergy
Aminatou's Augury
14%inclusion5 decks36 decks
12%synergy
Open the Vaults
14%inclusion5 decks36 decks
12%synergy
Diabolic Vision
14%inclusion5 decks36 decks
12%synergy
Brilliant Restoration
14%inclusion5 decks36 decks
12%synergy
Final Vengeance
11%inclusion4 decks36 decks
11%synergy
Ponder
11%inclusion4 decks36 decks
2%synergy
Damn
11%inclusion4 decks36 decks
-9%synergy
Portent
11%inclusion4 decks36 decks
8%synergy
Singularity Rupture
11%inclusion1 decks9 decks
9%synergy
Space-Time Anomaly
11%inclusion1 decks9 decks
9%synergy
Commune with Evil
8.3%inclusion3 decks36 decks
8%synergy
Austere Command
8.3%inclusion3 decks36 decks
-1%synergy
Cleansing Meditation
8.3%inclusion3 decks36 decks
8%synergy
Night's Whisper
8.3%inclusion3 decks36 decks
6%synergy
Unmarked Grave
5.6%inclusion2 decks36 decks
4%synergy
Fascination
5.6%inclusion2 decks36 decks
5%synergy
Feed the Swarm
5.6%inclusion2 decks36 decks
3%synergy
Buried Alive
5.6%inclusion2 decks36 decks
1%synergy
Legions to Ashes
5.6%inclusion2 decks36 decks
5%synergy
Windfall
5.6%inclusion2 decks36 decks
-8%synergy
Painful Truths
5.6%inclusion2 decks36 decks
3%synergy
Breakthrough
5.6%inclusion2 decks36 decks
5%synergy
Notion Rain
5.6%inclusion2 decks36 decks
5%synergy
Hour of Revelation
5.6%inclusion2 decks36 decks
5%synergy
Compulsive Research
5.6%inclusion2 decks36 decks
5%synergy
Utility Artifacts
Wayfarer's Bauble
19%inclusion7 decks36 decks
11%synergy
Perpetual Timepiece
17%inclusion6 decks36 decks
16%synergy
Brainstone
11%inclusion4 decks36 decks
10%synergy
Keys to the House
5.6%inclusion2 decks36 decks
5%synergy
The Everflowing Well
5.6%inclusion2 decks36 decks
5%synergy
Key to the City
5.6%inclusion2 decks36 decks
5%synergy
Enchantments
Defiled Crypt // Cadaver Lab
36%inclusion13 decks36 decks
35%synergy
Sphere of Safety
36%inclusion13 decks36 decks
27%synergy
Grasp of Fate
33%inclusion12 decks36 decks
27%synergy
Imprisoned in the Moon
33%inclusion12 decks36 decks
27%synergy
Seal of Doom
33%inclusion12 decks36 decks
33%synergy
Estrid's Invocation
33%inclusion12 decks36 decks
29%synergy
Shark Typhoon
33%inclusion12 decks36 decks
28%synergy
Secrets of the Dead
33%inclusion12 decks36 decks
33%synergy
Secret Arcade // Dusty Parlor
33%inclusion12 decks36 decks
28%synergy
Bottomless Pool // Locker Room
33%inclusion12 decks36 decks
31%synergy
Ethereal Armor
33%inclusion12 decks36 decks
29%synergy
Cacophony Unleashed
31%inclusion11 decks36 decks
29%synergy
Dress Down
28%inclusion10 decks36 decks
25%synergy
Cast Out
28%inclusion10 decks36 decks
25%synergy
Seal of Removal
28%inclusion10 decks36 decks
27%synergy
Extravagant Replication
28%inclusion10 decks36 decks
23%synergy
The Tale of Tamiyo
25%inclusion9 decks36 decks
25%synergy
All That Glitters
25%inclusion9 decks36 decks
16%synergy
Timely Ward
25%inclusion9 decks36 decks
20%synergy
Cramped Vents // Access Maze
22%inclusion8 decks36 decks
20%synergy
Unable to Scream
22%inclusion8 decks36 decks
21%synergy
Monologue Tax
22%inclusion8 decks36 decks
16%synergy
One with the Multiverse
19%inclusion7 decks36 decks
15%synergy
Spirit-Sister's Call
19%inclusion7 decks36 decks
18%synergy
Derelict Attic // Widow's Walk
19%inclusion7 decks36 decks
19%synergy
Ballad of the Black Flag
19%inclusion7 decks36 decks
19%synergy
Copy Enchantment
17%inclusion6 decks36 decks
12%synergy
The Restoration of Eiganjo
17%inclusion6 decks36 decks
16%synergy
Propaganda
17%inclusion6 decks36 decks
-10%synergy
Ripples of Undeath
17%inclusion6 decks36 decks
14%synergy
Restricted Office // Lecture Hall
17%inclusion6 decks36 decks
14%synergy
Phyrexian Arena
17%inclusion6 decks36 decks
3%synergy
Trapped in the Screen
14%inclusion5 decks36 decks
13%synergy
Curse of Silence
14%inclusion5 decks36 decks
14%synergy
Meat Locker // Drowned Diner
14%inclusion5 decks36 decks
13%synergy
The Bath Song
14%inclusion5 decks36 decks
13%synergy
King Narfi's Betrayal
14%inclusion5 decks36 decks
14%synergy
Life Insurance
14%inclusion5 decks36 decks
12%synergy
Glasswing Grace
11%inclusion4 decks36 decks
8%synergy
Grievous Wound
11%inclusion4 decks36 decks
10%synergy
Amphibian Downpour
11%inclusion4 decks36 decks
7%synergy
Polluted Cistern // Dim Oubliette
11%inclusion4 decks36 decks
11%synergy
Shardmage's Rescue
11%inclusion4 decks36 decks
11%synergy
Elspeth Conquers Death
11%inclusion4 decks36 decks
10%synergy
Hopeless Nightmare
11%inclusion4 decks36 decks
11%synergy
Genesis of the Daleks
11%inclusion4 decks36 decks
11%synergy
Vessel of Paramnesia
11%inclusion4 decks36 decks
11%synergy
Soul Snare
11%inclusion4 decks36 decks
11%synergy
Surgical Suite // Hospital Room
11%inclusion4 decks36 decks
11%synergy
Fraying Sanity
11%inclusion4 decks36 decks
11%synergy
Battles
Invasion of Theros
11%inclusion4 decks36 decks
9%synergy
Utility Lands
Bojuka Bog
39%inclusion14 decks36 decks
12%synergy
Hall of Heliod's Generosity
36%inclusion13 decks36 decks
23%synergy
Halimar Depths
22%inclusion8 decks36 decks
17%synergy
Nephalia Drownyard
8.3%inclusion3 decks36 decks
8%synergy
Secluded Steppe
5.6%inclusion2 decks36 decks
4%synergy
Barren Moor
5.6%inclusion2 decks36 decks
4%synergy
Drownyard Temple
5.6%inclusion2 decks36 decks
5%synergy
Dakmor Salvage
5.6%inclusion2 decks36 decks
5%synergy
Mana Artifacts
Arcane Signet
81%inclusion29 decks36 decks
-7%synergy
Sol Ring
69%inclusion25 decks36 decks
-21%synergy
Orzhov Signet
61%inclusion22 decks36 decks
26%synergy
Azorius Signet
61%inclusion22 decks36 decks
28%synergy
Dimir Signet
44%inclusion16 decks36 decks
12%synergy
Mind Stone
39%inclusion14 decks36 decks
26%synergy
Commander's Sphere
33%inclusion12 decks36 decks
14%synergy
Talisman of Progress
31%inclusion11 decks36 decks
-12%synergy
Talisman of Dominance
25%inclusion9 decks36 decks
-24%synergy
Fellwar Stone
22%inclusion8 decks36 decks
-12%synergy
Talisman of Hierarchy
22%inclusion8 decks36 decks
-21%synergy
Obelisk of Esper
8.3%inclusion3 decks36 decks
7%synergy
Lands
Plains
100%inclusion36 decks36 decks
9%synergy
Swamp
100%inclusion36 decks36 decks
9%synergy
Island
100%inclusion36 decks36 decks
7%synergy
Command Tower
89%inclusion32 decks36 decks
-4%synergy
Arcane Sanctum
72%inclusion26 decks36 decks
18%synergy
Terramorphic Expanse
64%inclusion23 decks36 decks
47%synergy
Temple of Enlightenment
56%inclusion20 decks36 decks
39%synergy
Obscura Storefront
53%inclusion19 decks36 decks
42%synergy
Evolving Wilds
53%inclusion19 decks36 decks
28%synergy
Dimir Aqueduct
50%inclusion18 decks36 decks
36%synergy
Prairie Stream
50%inclusion18 decks36 decks
9%synergy
Temple of Silence
50%inclusion18 decks36 decks
30%synergy
Temple of Deceit
47%inclusion17 decks36 decks
29%synergy
Caves of Koilos
47%inclusion17 decks36 decks
12%synergy
Azorius Chancery
47%inclusion17 decks36 decks
33%synergy
Exotic Orchard
47%inclusion17 decks36 decks
-11%synergy
Orzhov Basilica
47%inclusion17 decks36 decks
31%synergy
Tainted Isle
44%inclusion16 decks36 decks
38%synergy
Contaminated Landscape
44%inclusion16 decks36 decks
30%synergy
Tainted Field
42%inclusion15 decks36 decks
35%synergy
Adarkar Wastes
39%inclusion14 decks36 decks
8%synergy
Glacial Fortress
36%inclusion13 decks36 decks
-3%synergy
Ash Barrens
31%inclusion11 decks36 decks
20%synergy
Isolated Chapel
31%inclusion11 decks36 decks
-8%synergy
Sunken Hollow
31%inclusion11 decks36 decks
-9%synergy
Underground River
25%inclusion9 decks36 decks
-7%synergy
Thriving Moor
25%inclusion9 decks36 decks
21%synergy
Thriving Isle
25%inclusion9 decks36 decks
20%synergy
Shineshadow Snarl
25%inclusion9 decks36 decks
15%synergy
Choked Estuary
22%inclusion8 decks36 decks
6%synergy
Thriving Heath
22%inclusion8 decks36 decks
18%synergy
Darkwater Catacombs
19%inclusion7 decks36 decks
5%synergy
Drowned Catacomb
19%inclusion7 decks36 decks
-16%synergy
Fetid Pools
17%inclusion6 decks36 decks
10%synergy
Myriad Landscape
17%inclusion6 decks36 decks
8%synergy
Port Town
17%inclusion6 decks36 decks
0%synergy
Skycloud Expanse
17%inclusion6 decks36 decks
2%synergy
Irrigated Farmland
17%inclusion6 decks36 decks
9%synergy
Valgavoth's Lair
14%inclusion5 decks36 decks
11%synergy
Path of Ancestry
14%inclusion5 decks36 decks
-13%synergy
Escape Tunnel
11%inclusion4 decks36 decks
10%synergy
Glasswing Grace
11%inclusion4 decks36 decks
8%synergy
Tranquil Cove
11%inclusion4 decks36 decks
5%synergy
Sunlit Marsh
11%inclusion4 decks36 decks
7%synergy
Desolate Mire
8.3%inclusion3 decks36 decks
3%synergy
Contaminated Aquifer
8.3%inclusion3 decks36 decks
5%synergy
Scoured Barrens
8.3%inclusion3 decks36 decks
2%synergy
Snowfield Sinkhole
5.6%inclusion2 decks36 decks
4%synergy
River of Tears
5.6%inclusion2 decks36 decks
3%synergy
Floodfarm Verge
5.6%inclusion2 decks36 decks
-6%synergy
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