The Master of Keys (Commander) - Budget Core

The Master of Keys
Rank #316
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
50%inclusion1 decks2 decks
49%synergy
High Synergy Cards
Mesa Enchantress
75%inclusion27 decks36 decks
66%synergy
Inquisitive Glimmer
72%inclusion26 decks36 decks
64%synergy
Scrabbling Skullcrab
61%inclusion22 decks36 decks
60%synergy
Starfield Mystic
67%inclusion24 decks36 decks
60%synergy
Gravebreaker Lamia
53%inclusion19 decks36 decks
52%synergy
Demon of Fate's Design
56%inclusion20 decks36 decks
50%synergy
Doomwake Giant
56%inclusion20 decks36 decks
50%synergy
Sigil of the Empty Throne
56%inclusion20 decks36 decks
50%synergy
Cemetery Tampering
50%inclusion18 decks36 decks
49%synergy
Entity Tracker
53%inclusion19 decks36 decks
46%synergy
Top Cards
Seal of Cleansing
47%inclusion17 decks36 decks
46%synergy
Fear of Sleep Paralysis
42%inclusion15 decks36 decks
36%synergy
Defiled Crypt // Cadaver Lab
39%inclusion14 decks36 decks
38%synergy
Grasp of Fate
36%inclusion13 decks36 decks
30%synergy
Victor, Valgavoth's Seneschal
36%inclusion13 decks36 decks
34%synergy
Secrets of the Dead
36%inclusion13 decks36 decks
36%synergy
Dress Down
36%inclusion13 decks36 decks
34%synergy
Ondu Spiritdancer
36%inclusion13 decks36 decks
30%synergy
Sage of Mysteries
36%inclusion13 decks36 decks
36%synergy
Seal of Doom
36%inclusion13 decks36 decks
36%synergy
Creatures
Ghostly Dancers
36%inclusion13 decks36 decks
33%synergy
Archon of Sun's Grace
33%inclusion12 decks36 decks
29%synergy
Fear of Impostors
33%inclusion12 decks36 decks
32%synergy
Soaring Lightbringer
31%inclusion11 decks36 decks
25%synergy
Alseid of Life's Bounty
31%inclusion11 decks36 decks
29%synergy
Skullsnap Nuisance
28%inclusion10 decks36 decks
27%synergy
Mindwrack Harpy
28%inclusion10 decks36 decks
27%synergy
Fear of Infinity
28%inclusion10 decks36 decks
27%synergy
Moon-Blessed Cleric
25%inclusion9 decks36 decks
20%synergy
Grim Guardian
22%inclusion8 decks36 decks
20%synergy
Balemurk Leech
22%inclusion8 decks36 decks
21%synergy
Heliod, the Radiant Dawn
22%inclusion8 decks36 decks
18%synergy
Zur the Enchanter
22%inclusion8 decks36 decks
17%synergy
Gremlin Tamer
22%inclusion8 decks36 decks
21%synergy
Aminatou, Veil Piercer
22%inclusion8 decks36 decks
21%synergy
Silent Hallcreeper
19%inclusion7 decks36 decks
15%synergy
Archetype of Imagination
17%inclusion6 decks36 decks
12%synergy
Fear of Surveillance
17%inclusion6 decks36 decks
16%synergy
Millikin
17%inclusion6 decks36 decks
16%synergy
Starnheim Courser
17%inclusion6 decks36 decks
13%synergy
Spirited Companion
14%inclusion5 decks36 decks
12%synergy
Appendage Amalgam
14%inclusion5 decks36 decks
14%synergy
Ajani's Chosen
14%inclusion5 decks36 decks
13%synergy
Overlord of the Floodpits
14%inclusion5 decks36 decks
10%synergy
Ashiok's Reaper
14%inclusion5 decks36 decks
13%synergy
Solemn Simulacrum
11%inclusion4 decks36 decks
-4%synergy
Athreos, Shroud-Veiled
11%inclusion4 decks36 decks
7%synergy
Fear of Isolation
11%inclusion4 decks36 decks
11%synergy
Stitcher's Supplier
11%inclusion4 decks36 decks
10%synergy
Sun Titan
11%inclusion4 decks36 decks
2%synergy
Auramancer
11%inclusion4 decks36 decks
8%synergy
Fear of Lost Teeth
11%inclusion4 decks36 decks
11%synergy
Nighthowler
11%inclusion4 decks36 decks
11%synergy
Nashi, Searcher in the Dark
11%inclusion4 decks36 decks
11%synergy
Nightmare Shepherd
8.3%inclusion3 decks36 decks
6%synergy
Transcendent Envoy
8.3%inclusion3 decks36 decks
7%synergy
Patrician Geist
8.3%inclusion3 decks36 decks
8%synergy
Brain Maggot
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
Ian Chesterton
8.3%inclusion3 decks36 decks
8%synergy
Summon: Yojimbo
7.7%inclusion1 decks13 decks
7%synergy
The Warring Triad
7.7%inclusion1 decks13 decks
7%synergy
Devoted Grafkeeper
5.6%inclusion2 decks36 decks
6%synergy
Fear of Failed Tests
5.6%inclusion2 decks36 decks
5%synergy
Scholar of New Horizons
5.6%inclusion2 decks36 decks
5%synergy
Thassa's Devourer
5.6%inclusion2 decks36 decks
5%synergy
Archetype of Finality
5.6%inclusion2 decks36 decks
5%synergy
Phantatog
5.6%inclusion2 decks36 decks
6%synergy
Instants
Swords to Plowshares
36%inclusion13 decks36 decks
-32%synergy
Negate
31%inclusion11 decks36 decks
14%synergy
Otherworldly Gaze
28%inclusion10 decks36 decks
26%synergy
Path to Exile
28%inclusion10 decks36 decks
-14%synergy
Void Rend
25%inclusion9 decks36 decks
-8%synergy
Fact or Fiction
25%inclusion9 decks36 decks
21%synergy
Thirst for Meaning
19%inclusion7 decks36 decks
18%synergy
Frantic Search
14%inclusion5 decks36 decks
-3%synergy
Arcane Denial
14%inclusion5 decks36 decks
-6%synergy
Rowan's Grim Search
14%inclusion5 decks36 decks
14%synergy
An Offer You Can't Refuse
11%inclusion4 decks36 decks
-15%synergy
Generous Gift
11%inclusion4 decks36 decks
-4%synergy
Forbidden Alchemy
8.3%inclusion3 decks36 decks
7%synergy
Counterspell
8.3%inclusion3 decks36 decks
-33%synergy
Utter End
8.3%inclusion3 decks36 decks
1%synergy
Refute
6.5%inclusion2 decks31 decks
4%synergy
Drown in the Loch
5.6%inclusion2 decks36 decks
3%synergy
Sinister Sabotage
5.6%inclusion2 decks36 decks
5%synergy
Live or Die
5.6%inclusion2 decks36 decks
5%synergy
Final Payment
5.6%inclusion2 decks36 decks
5%synergy
Return to Dust
5.6%inclusion2 decks36 decks
2%synergy
Brainstorm
5.6%inclusion2 decks36 decks
-12%synergy
Argivian Find
5.6%inclusion2 decks36 decks
5%synergy
Defabricate
5.6%inclusion2 decks36 decks
5%synergy
Thought Scour
5.6%inclusion2 decks36 decks
4%synergy
Unwanted Remake
5.6%inclusion2 decks36 decks
5%synergy
Sorceries
Redress Fate
36%inclusion13 decks36 decks
30%synergy
Sevinne's Reclamation
33%inclusion12 decks36 decks
25%synergy
Time Wipe
28%inclusion10 decks36 decks
21%synergy
Dance of the Manse
22%inclusion8 decks36 decks
18%synergy
Extinguish All Hope
22%inclusion8 decks36 decks
21%synergy
Resurgent Belief
17%inclusion6 decks36 decks
14%synergy
Open the Vaults
14%inclusion5 decks36 decks
12%synergy
Brilliant Restoration
14%inclusion5 decks36 decks
12%synergy
Damn
14%inclusion5 decks36 decks
-6%synergy
Final Vengeance
11%inclusion4 decks36 decks
11%synergy
Singularity Rupture
11%inclusion1 decks9 decks
9%synergy
Space-Time Anomaly
11%inclusion1 decks9 decks
9%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
Legions to Ashes
8.3%inclusion3 decks36 decks
8%synergy
Commune with Evil
8.3%inclusion3 decks36 decks
8%synergy
Read the Bones
8.3%inclusion3 decks36 decks
4%synergy
Windfall
5.6%inclusion2 decks36 decks
-8%synergy
Winds of Abandon
5.6%inclusion2 decks36 decks
4%synergy
Painful Truths
5.6%inclusion2 decks36 decks
3%synergy
Gix's Command
5.6%inclusion2 decks36 decks
5%synergy
Compulsive Research
5.6%inclusion2 decks36 decks
5%synergy
Fascination
5.6%inclusion2 decks36 decks
5%synergy
Buried Alive
5.6%inclusion2 decks36 decks
1%synergy
Unmarked Grave
5.6%inclusion2 decks36 decks
4%synergy
Feed the Swarm
5.6%inclusion2 decks36 decks
3%synergy
Hour of Revelation
5.6%inclusion2 decks36 decks
5%synergy
Winds of Rath
5.6%inclusion2 decks36 decks
3%synergy
Breakthrough
5.6%inclusion2 decks36 decks
5%synergy
Notion Rain
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
The Everflowing Well
5.6%inclusion2 decks36 decks
5%synergy
Key to the City
5.6%inclusion2 decks36 decks
5%synergy
Bident of Thassa
5.6%inclusion2 decks36 decks
-3%synergy
Cloud Key
5.6%inclusion2 decks36 decks
2%synergy
Enchantments
Stillness in Motion
36%inclusion5 decks14 decks
35%synergy
Estrid's Invocation
33%inclusion12 decks36 decks
29%synergy
Seal of Removal
33%inclusion12 decks36 decks
33%synergy
Mirrormade
33%inclusion12 decks36 decks
23%synergy
Ethereal Armor
33%inclusion12 decks36 decks
29%synergy
The Eldest Reborn
33%inclusion12 decks36 decks
31%synergy
Cacophony Unleashed
31%inclusion11 decks36 decks
29%synergy
Unable to Scream
31%inclusion11 decks36 decks
29%synergy
All That Glitters
31%inclusion11 decks36 decks
22%synergy
Imprisoned in the Moon
31%inclusion11 decks36 decks
24%synergy
The Tale of Tamiyo
28%inclusion10 decks36 decks
27%synergy
Ripples of Undeath
25%inclusion9 decks36 decks
22%synergy
Shark Typhoon
25%inclusion9 decks36 decks
19%synergy
Bottomless Pool // Locker Room
25%inclusion9 decks36 decks
23%synergy
Ballad of the Black Flag
22%inclusion8 decks36 decks
22%synergy
Sphere of Safety
22%inclusion8 decks36 decks
13%synergy
Secret Arcade // Dusty Parlor
22%inclusion8 decks36 decks
17%synergy
The Restoration of Eiganjo
19%inclusion7 decks36 decks
19%synergy
King Narfi's Betrayal
19%inclusion7 decks36 decks
19%synergy
Derelict Attic // Widow's Walk
19%inclusion7 decks36 decks
19%synergy
Amphibian Downpour
19%inclusion7 decks36 decks
15%synergy
Timely Ward
19%inclusion7 decks36 decks
14%synergy
Propaganda
19%inclusion7 decks36 decks
-7%synergy
Elspeth Conquers Death
17%inclusion6 decks36 decks
16%synergy
Meat Locker // Drowned Diner
17%inclusion6 decks36 decks
16%synergy
Copy Enchantment
17%inclusion6 decks36 decks
12%synergy
Restricted Office // Lecture Hall
17%inclusion6 decks36 decks
14%synergy
The Bath Song
17%inclusion6 decks36 decks
16%synergy
Glasswing Grace
14%inclusion5 decks36 decks
11%synergy
Hopeless Nightmare
14%inclusion5 decks36 decks
14%synergy
Genesis of the Daleks
14%inclusion5 decks36 decks
14%synergy
Vessel of Paramnesia
14%inclusion5 decks36 decks
14%synergy
Darksteel Mutation
14%inclusion5 decks36 decks
7%synergy
Polluted Cistern // Dim Oubliette
14%inclusion5 decks36 decks
13%synergy
Cast Out
14%inclusion5 decks36 decks
11%synergy
Curse of Silence
14%inclusion5 decks36 decks
14%synergy
Extravagant Replication
14%inclusion5 decks36 decks
9%synergy
Soul Snare
14%inclusion5 decks36 decks
14%synergy
Ghostly Prison
14%inclusion5 decks36 decks
-8%synergy
Phyrexian Arena
14%inclusion5 decks36 decks
0%synergy
Cramped Vents // Access Maze
11%inclusion4 decks36 decks
8%synergy
Spirit-Sister's Call
11%inclusion4 decks36 decks
10%synergy
Michiko's Reign of Truth
11%inclusion4 decks36 decks
10%synergy
The Modern Age
11%inclusion4 decks36 decks
11%synergy
The Night of the Doctor
11%inclusion4 decks36 decks
11%synergy
Scroll of Isildur
11%inclusion4 decks36 decks
11%synergy
Monologue Tax
11%inclusion4 decks36 decks
5%synergy
History of Benalia
11%inclusion4 decks36 decks
10%synergy
Fall of the First Civilization
11%inclusion4 decks36 decks
11%synergy
Tymaret Calls the Dead
11%inclusion4 decks36 decks
11%synergy
Battles
Invasion of Theros
17%inclusion6 decks36 decks
15%synergy
Utility Lands
Bojuka Bog
33%inclusion12 decks36 decks
6%synergy
Hall of Heliod's Generosity
22%inclusion8 decks36 decks
9%synergy
Halimar Depths
11%inclusion4 decks36 decks
6%synergy
Nephalia Drownyard
8.3%inclusion3 decks36 decks
8%synergy
Barren Moor
5.6%inclusion2 decks36 decks
4%synergy
Secluded Steppe
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
78%inclusion28 decks36 decks
-10%synergy
Sol Ring
72%inclusion26 decks36 decks
-18%synergy
Azorius Signet
58%inclusion21 decks36 decks
25%synergy
Orzhov Signet
56%inclusion20 decks36 decks
21%synergy
Dimir Signet
53%inclusion19 decks36 decks
20%synergy
Talisman of Progress
42%inclusion15 decks36 decks
-1%synergy
Talisman of Dominance
36%inclusion13 decks36 decks
-13%synergy
Talisman of Hierarchy
33%inclusion12 decks36 decks
-10%synergy
Mind Stone
31%inclusion11 decks36 decks
17%synergy
Fellwar Stone
28%inclusion10 decks36 decks
-6%synergy
Commander's Sphere
22%inclusion8 decks36 decks
3%synergy
Obelisk of Esper
8.3%inclusion3 decks36 decks
7%synergy
Thought Vessel
5.6%inclusion2 decks36 decks
-19%synergy
Lands
Swamp
100%inclusion36 decks36 decks
9%synergy
Plains
100%inclusion36 decks36 decks
9%synergy
Island
100%inclusion36 decks36 decks
7%synergy
Command Tower
92%inclusion33 decks36 decks
-1%synergy
Arcane Sanctum
72%inclusion26 decks36 decks
18%synergy
Terramorphic Expanse
61%inclusion22 decks36 decks
44%synergy
Prairie Stream
58%inclusion21 decks36 decks
18%synergy
Contaminated Landscape
56%inclusion20 decks36 decks
41%synergy
Exotic Orchard
56%inclusion20 decks36 decks
-3%synergy
Evolving Wilds
50%inclusion18 decks36 decks
25%synergy
Dimir Aqueduct
44%inclusion16 decks36 decks
30%synergy
Temple of Enlightenment
44%inclusion16 decks36 decks
27%synergy
Caves of Koilos
44%inclusion16 decks36 decks
9%synergy
Sunken Hollow
42%inclusion15 decks36 decks
2%synergy
Obscura Storefront
42%inclusion15 decks36 decks
31%synergy
Tainted Isle
39%inclusion14 decks36 decks
32%synergy
Glacial Fortress
39%inclusion14 decks36 decks
0%synergy
Temple of Deceit
39%inclusion14 decks36 decks
20%synergy
Temple of Silence
39%inclusion14 decks36 decks
19%synergy
Azorius Chancery
36%inclusion13 decks36 decks
21%synergy
Orzhov Basilica
36%inclusion13 decks36 decks
20%synergy
Tainted Field
36%inclusion13 decks36 decks
29%synergy
Adarkar Wastes
36%inclusion13 decks36 decks
6%synergy
Shineshadow Snarl
33%inclusion12 decks36 decks
23%synergy
Isolated Chapel
33%inclusion12 decks36 decks
-5%synergy
Choked Estuary
31%inclusion11 decks36 decks
14%synergy
Myriad Landscape
22%inclusion8 decks36 decks
13%synergy
Irrigated Farmland
22%inclusion8 decks36 decks
15%synergy
Port Town
22%inclusion8 decks36 decks
5%synergy
Darkwater Catacombs
22%inclusion8 decks36 decks
8%synergy
Skycloud Expanse
22%inclusion8 decks36 decks
8%synergy
Drowned Catacomb
22%inclusion8 decks36 decks
-13%synergy
Fetid Pools
19%inclusion7 decks36 decks
13%synergy
Ash Barrens
19%inclusion7 decks36 decks
9%synergy
Underground River
19%inclusion7 decks36 decks
-13%synergy
Path of Ancestry
17%inclusion6 decks36 decks
-11%synergy
Escape Tunnel
14%inclusion5 decks36 decks
13%synergy
Glasswing Grace
14%inclusion5 decks36 decks
11%synergy
Desolate Mire
14%inclusion5 decks36 decks
8%synergy
Valgavoth's Lair
14%inclusion5 decks36 decks
11%synergy
Thriving Isle
14%inclusion5 decks36 decks
9%synergy
Sunlit Marsh
14%inclusion5 decks36 decks
10%synergy
Thriving Moor
14%inclusion5 decks36 decks
9%synergy
Tranquil Cove
11%inclusion4 decks36 decks
5%synergy
Contaminated Aquifer
11%inclusion4 decks36 decks
7%synergy
Thriving Heath
11%inclusion4 decks36 decks
7%synergy
Esper Panorama
8.3%inclusion3 decks36 decks
5%synergy
Demolition Field
8.3%inclusion3 decks36 decks
5%synergy
Scoured Barrens
8.3%inclusion3 decks36 decks
2%synergy
Fetid Heath
5.6%inclusion2 decks36 decks
-6%synergy
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