The Master of Keys (Commander) - Budget Self-Mill

The Master of Keys
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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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Airbender Ascension
33%inclusion1 decks3 decks
33%synergy
Northern Air Temple
33%inclusion1 decks3 decks
33%synergy
The Spirit Oasis
33%inclusion1 decks3 decks
33%synergy
Southern Air Temple
14%inclusion1 decks7 decks
14%synergy
High Synergy Cards
Inquisitive Glimmer
100%inclusion12 decks12 decks
92%synergy
Scrabbling Skullcrab
92%inclusion11 decks12 decks
91%synergy
Doomwake Giant
83%inclusion10 decks12 decks
77%synergy
Mesa Enchantress
83%inclusion10 decks12 decks
74%synergy
Gravebreaker Lamia
75%inclusion9 decks12 decks
74%synergy
Starfield Mystic
75%inclusion9 decks12 decks
68%synergy
Entity Tracker
67%inclusion8 decks12 decks
60%synergy
Fear of Impostors
58%inclusion7 decks12 decks
57%synergy
Ethereal Armor
58%inclusion7 decks12 decks
54%synergy
Demon of Fate's Design
58%inclusion7 decks12 decks
53%synergy
Top Cards
Frantic Search
58%inclusion7 decks12 decks
41%synergy
Sigil of the Empty Throne
58%inclusion7 decks12 decks
52%synergy
Sevinne's Reclamation
50%inclusion6 decks12 decks
41%synergy
Sage of Mysteries
50%inclusion6 decks12 decks
50%synergy
Void Rend
50%inclusion6 decks12 decks
16%synergy
Moon-Blessed Cleric
50%inclusion6 decks12 decks
45%synergy
All That Glitters
50%inclusion6 decks12 decks
41%synergy
Defiled Crypt // Cadaver Lab
50%inclusion6 decks12 decks
49%synergy
Soaring Lightbringer
42%inclusion5 decks12 decks
37%synergy
Silent Hallcreeper
42%inclusion5 decks12 decks
37%synergy
Game Changers
Bolas's Citadel
8.3%inclusion1 decks12 decks
-1%synergy
Creatures
Victor, Valgavoth's Seneschal
42%inclusion5 decks12 decks
40%synergy
Fear of Sleep Paralysis
42%inclusion5 decks12 decks
36%synergy
Aminatou, Veil Piercer
42%inclusion5 decks12 decks
40%synergy
Grim Guardian
42%inclusion5 decks12 decks
39%synergy
Ghostly Dancers
42%inclusion5 decks12 decks
39%synergy
Zur the Enchanter
42%inclusion5 decks12 decks
36%synergy
Fear of Infinity
33%inclusion4 decks12 decks
33%synergy
Heliod, the Radiant Dawn
33%inclusion4 decks12 decks
30%synergy
Mindwrack Harpy
33%inclusion4 decks12 decks
33%synergy
Emet-Selch of the Third Seat
29%inclusion2 decks7 decks
19%synergy
Dreadwing Scavenger
27%inclusion3 decks11 decks
27%synergy
Archon of Sun's Grace
25%inclusion3 decks12 decks
20%synergy
Fear of Surveillance
25%inclusion3 decks12 decks
25%synergy
Skullsnap Nuisance
25%inclusion3 decks12 decks
25%synergy
Spirited Companion
25%inclusion3 decks12 decks
23%synergy
Enduring Curiosity
25%inclusion3 decks12 decks
17%synergy
Gremlin Tamer
25%inclusion3 decks12 decks
24%synergy
Balemurk Leech
25%inclusion3 decks12 decks
24%synergy
Nightmare Shepherd
25%inclusion3 decks12 decks
23%synergy
Zur, Eternal Schemer
25%inclusion3 decks12 decks
22%synergy
Ondu Spiritdancer
25%inclusion3 decks12 decks
19%synergy
Alseid of Life's Bounty
25%inclusion3 decks12 decks
24%synergy
Solemn Simulacrum
17%inclusion2 decks12 decks
2%synergy
Stenn, Paranoid Partisan
17%inclusion2 decks12 decks
15%synergy
Protean Thaumaturge
17%inclusion2 decks12 decks
16%synergy
Overlord of the Floodpits
17%inclusion2 decks12 decks
13%synergy
Heliod, God of the Sun
17%inclusion2 decks12 decks
16%synergy
The Ancient One
17%inclusion2 decks12 decks
16%synergy
Stitcher's Supplier
17%inclusion2 decks12 decks
16%synergy
Fear of the Dark
17%inclusion2 decks12 decks
16%synergy
Athreos, Shroud-Veiled
17%inclusion2 decks12 decks
12%synergy
Appendage Amalgam
17%inclusion2 decks12 decks
16%synergy
Underworld Coinsmith
17%inclusion2 decks12 decks
16%synergy
Callaphe, Beloved of the Sea
17%inclusion2 decks12 decks
15%synergy
Y'shtola, Night's Blessed
11%inclusion1 decks9 decks
10%synergy
Phenax, God of Deception
8.3%inclusion1 decks12 decks
8%synergy
Fear of Isolation
8.3%inclusion1 decks12 decks
8%synergy
Heliod's Pilgrim
8.3%inclusion1 decks12 decks
8%synergy
Raff Capashen, Ship's Mage
8.3%inclusion1 decks12 decks
8%synergy
Patrician Geist
8.3%inclusion1 decks12 decks
8%synergy
Glyph Elemental
8.3%inclusion1 decks12 decks
8%synergy
Ian Chesterton
8.3%inclusion1 decks12 decks
8%synergy
Fear of Lost Teeth
8.3%inclusion1 decks12 decks
8%synergy
Baleful Strix
8.3%inclusion1 decks12 decks
-12%synergy
Lord of the Forsaken
8.3%inclusion1 decks12 decks
8%synergy
Hanna, Ship's Navigator
8.3%inclusion1 decks12 decks
6%synergy
Lurrus of the Dream-Den
8.3%inclusion1 decks12 decks
7%synergy
Scholar of New Horizons
8.3%inclusion1 decks12 decks
8%synergy
Agent of Erebos
8.3%inclusion1 decks12 decks
8%synergy
Arna Kennerüd, Skycaptain
8.3%inclusion1 decks12 decks
6%synergy
Instants
Thirst for Meaning
42%inclusion5 decks12 decks
40%synergy
Swords to Plowshares
42%inclusion5 decks12 decks
-27%synergy
Otherworldly Gaze
42%inclusion5 decks12 decks
39%synergy
Negate
33%inclusion4 decks12 decks
17%synergy
Counterspell
33%inclusion4 decks12 decks
-8%synergy
Dovin's Veto
25%inclusion3 decks12 decks
0%synergy
Brainstorm
17%inclusion2 decks12 decks
-1%synergy
Fact or Fiction
17%inclusion2 decks12 decks
13%synergy
Path to Exile
17%inclusion2 decks12 decks
-25%synergy
Don't Make a Sound
17%inclusion2 decks12 decks
16%synergy
Refute
9.1%inclusion1 decks11 decks
6%synergy
Hero's Downfall
8.3%inclusion1 decks12 decks
8%synergy
Thirst for Discovery
8.3%inclusion1 decks12 decks
8%synergy
An Offer You Can't Refuse
8.3%inclusion1 decks12 decks
-18%synergy
Faith's Reward
8.3%inclusion1 decks12 decks
8%synergy
Return to Dust
8.3%inclusion1 decks12 decks
5%synergy
Essence Scatter
8.3%inclusion1 decks12 decks
8%synergy
Consider
8.3%inclusion1 decks12 decks
6%synergy
Reality Shift
8.3%inclusion1 decks12 decks
7%synergy
Ertai's Scorn
8.3%inclusion1 decks12 decks
8%synergy
Cancel
8.3%inclusion1 decks12 decks
7%synergy
Murder
8.3%inclusion1 decks12 decks
7%synergy
Hindering Light
8.3%inclusion1 decks12 decks
7%synergy
Glimmerburst
8.3%inclusion1 decks12 decks
8%synergy
Arcane Denial
8.3%inclusion1 decks12 decks
-12%synergy
Anguished Unmaking
8.3%inclusion1 decks12 decks
-17%synergy
Lazotep Plating
8.3%inclusion1 decks12 decks
7%synergy
Despark
8.3%inclusion1 decks12 decks
-8%synergy
Feed the Cycle
8.3%inclusion1 decks12 decks
8%synergy
Mana Leak
8.3%inclusion1 decks12 decks
6%synergy
Utter End
8.3%inclusion1 decks12 decks
1%synergy
Wrong Turn
8.3%inclusion1 decks12 decks
8%synergy
Spell Pierce
8.3%inclusion1 decks12 decks
6%synergy
Unwind
8.3%inclusion1 decks12 decks
3%synergy
Rowan's Grim Search
8.3%inclusion1 decks12 decks
8%synergy
Mortify
8.3%inclusion1 decks12 decks
-1%synergy
Sorceries
Dance of the Manse
42%inclusion5 decks12 decks
38%synergy
Extinguish All Hope
33%inclusion4 decks12 decks
32%synergy
Read the Bones
25%inclusion3 decks12 decks
21%synergy
Brilliant Restoration
25%inclusion3 decks12 decks
23%synergy
Redress Fate
25%inclusion3 decks12 decks
19%synergy
Supreme Verdict
17%inclusion2 decks12 decks
2%synergy
Austere Command
17%inclusion2 decks12 decks
8%synergy
Time Wipe
17%inclusion2 decks12 decks
10%synergy
Cut Your Losses
17%inclusion2 decks12 decks
16%synergy
Feed the Swarm
17%inclusion2 decks12 decks
14%synergy
Space-Time Anomaly
14%inclusion1 decks7 decks
13%synergy
Windfall
8.3%inclusion1 decks12 decks
-5%synergy
Requisition Raid
8.3%inclusion1 decks12 decks
7%synergy
Lively Dirge
8.3%inclusion1 decks12 decks
7%synergy
Resurgent Belief
8.3%inclusion1 decks12 decks
6%synergy
Open the Vaults
8.3%inclusion1 decks12 decks
7%synergy
Victimize
8.3%inclusion1 decks12 decks
0%synergy
Nightmare Unmaking
8.3%inclusion1 decks12 decks
8%synergy
Open the Armory
8.3%inclusion1 decks12 decks
5%synergy
Doomskar
8.3%inclusion1 decks12 decks
8%synergy
Terminus
8.3%inclusion1 decks12 decks
4%synergy
Glimpse the Unthinkable
8.3%inclusion1 decks12 decks
8%synergy
Lórien Revealed
8.3%inclusion1 decks12 decks
6%synergy
Starfall Invocation
8.3%inclusion1 decks12 decks
6%synergy
Night's Whisper
8.3%inclusion1 decks12 decks
6%synergy
Unfinished Business
8.3%inclusion1 decks12 decks
8%synergy
Buried Alive
8.3%inclusion1 decks12 decks
4%synergy
Atrocious Experiment
8.3%inclusion1 decks12 decks
8%synergy
Preordain
8.3%inclusion1 decks12 decks
3%synergy
Damn
8.3%inclusion1 decks12 decks
-12%synergy
Retether
8.3%inclusion1 decks12 decks
7%synergy
Final Vengeance
8.3%inclusion1 decks12 decks
8%synergy
Day of Judgment
8.3%inclusion1 decks12 decks
7%synergy
Unburial Rites
8.3%inclusion1 decks12 decks
5%synergy
Languish
8.3%inclusion1 decks12 decks
8%synergy
Compulsive Research
8.3%inclusion1 decks12 decks
8%synergy
Utility Artifacts
Wayfarer's Bauble
33%inclusion4 decks12 decks
25%synergy
Swiftfoot Boots
33%inclusion4 decks12 decks
9%synergy
Bident of Thassa
17%inclusion2 decks12 decks
8%synergy
Rescue Skiff
14%inclusion1 decks7 decks
14%synergy
Riverchurn Monument
11%inclusion1 decks9 decks
11%synergy
Matzalantli, the Great Door
8.3%inclusion1 decks12 decks
6%synergy
Perpetual Timepiece
8.3%inclusion1 decks12 decks
8%synergy
Power Conduit
8.3%inclusion1 decks12 decks
8%synergy
Keys to the House
8.3%inclusion1 decks12 decks
8%synergy
Mirage Mirror
8.3%inclusion1 decks12 decks
7%synergy
Glimmerlight
8.3%inclusion1 decks12 decks
8%synergy
Mask of Avacyn
8.3%inclusion1 decks12 decks
8%synergy
Crystal Chimes
8.3%inclusion1 decks12 decks
8%synergy
Enchantments
Central Elevator // Promising Stairs
42%inclusion5 decks12 decks
41%synergy
Cemetery Tampering
42%inclusion5 decks12 decks
41%synergy
Polluted Cistern // Dim Oubliette
42%inclusion5 decks12 decks
41%synergy
Ripples of Undeath
33%inclusion4 decks12 decks
31%synergy
Mirrormade
33%inclusion4 decks12 decks
24%synergy
Estrid's Invocation
33%inclusion4 decks12 decks
29%synergy
Copy Enchantment
33%inclusion4 decks12 decks
29%synergy
Meat Locker // Drowned Diner
33%inclusion4 decks12 decks
33%synergy
Derelict Attic // Widow's Walk
33%inclusion4 decks12 decks
33%synergy
Sphere of Safety
33%inclusion4 decks12 decks
24%synergy
Seal of Cleansing
33%inclusion4 decks12 decks
32%synergy
Bottomless Pool // Locker Room
33%inclusion4 decks12 decks
31%synergy
Dress Down
33%inclusion4 decks12 decks
31%synergy
Dazzling Theater // Prop Room
33%inclusion4 decks12 decks
32%synergy
Secret Arcade // Dusty Parlor
33%inclusion4 decks12 decks
28%synergy
Stillness in Motion
29%inclusion2 decks7 decks
28%synergy
Darksteel Mutation
25%inclusion3 decks12 decks
19%synergy
Grasp of Fate
25%inclusion3 decks12 decks
19%synergy
Cramped Vents // Access Maze
25%inclusion3 decks12 decks
22%synergy
Underwater Tunnel // Slimy Aquarium
25%inclusion3 decks12 decks
25%synergy
Extravagant Replication
25%inclusion3 decks12 decks
20%synergy
Timely Ward
25%inclusion3 decks12 decks
20%synergy
The Tale of Tamiyo
25%inclusion3 decks12 decks
25%synergy
Restricted Office // Lecture Hall
25%inclusion3 decks12 decks
23%synergy
Secrets of the Dead
25%inclusion3 decks12 decks
25%synergy
Propaganda
25%inclusion3 decks12 decks
-2%synergy
One with the Multiverse
17%inclusion2 decks12 decks
12%synergy
Staggering Insight
17%inclusion2 decks12 decks
15%synergy
Builder's Talent
17%inclusion2 decks12 decks
16%synergy
Daybreak Coronet
17%inclusion2 decks12 decks
15%synergy
Court of Cunning
17%inclusion2 decks12 decks
16%synergy
King Narfi's Betrayal
17%inclusion2 decks12 decks
16%synergy
Chains of Custody
17%inclusion2 decks12 decks
16%synergy
Surgical Suite // Hospital Room
17%inclusion2 decks12 decks
16%synergy
Mantle of the Ancients
17%inclusion2 decks12 decks
14%synergy
Funeral Room // Awakening Hall
17%inclusion2 decks12 decks
16%synergy
Amphibian Downpour
17%inclusion2 decks12 decks
12%synergy
Fraying Sanity
17%inclusion2 decks12 decks
16%synergy
Mirror Room // Fractured Realm
17%inclusion2 decks12 decks
14%synergy
Ghostly Prison
17%inclusion2 decks12 decks
-5%synergy
Seal of Removal
17%inclusion2 decks12 decks
16%synergy
Combat Research
17%inclusion2 decks12 decks
14%synergy
Observed Stasis
14%inclusion1 decks7 decks
8%synergy
Chorale of the Void
14%inclusion1 decks7 decks
14%synergy
Twinblade Blessing
9.1%inclusion1 decks11 decks
8%synergy
Demonic Vigor
8.3%inclusion1 decks12 decks
8%synergy
Robe of Mirrors
8.3%inclusion1 decks12 decks
8%synergy
Minimus Containment
8.3%inclusion1 decks12 decks
8%synergy
Omen of the Dead
8.3%inclusion1 decks12 decks
8%synergy
Phyrexian Scriptures
8.3%inclusion1 decks12 decks
7%synergy
Battles
Invasion of Theros
25%inclusion3 decks12 decks
23%synergy
Planeswalkers
Kaya, Orzhov Usurper
8.3%inclusion1 decks12 decks
8%synergy
Ashiok, Dream Render
8.3%inclusion1 decks12 decks
7%synergy
Utility Lands
Bojuka Bog
42%inclusion5 decks12 decks
14%synergy
Nephalia Drownyard
17%inclusion2 decks12 decks
16%synergy
Ishgard, the Holy See
14%inclusion1 decks7 decks
11%synergy
Mortuary Mire
8.3%inclusion1 decks12 decks
6%synergy
Hall of Heliod's Generosity
8.3%inclusion1 decks12 decks
-5%synergy
Halimar Depths
8.3%inclusion1 decks12 decks
4%synergy
Reliquary Tower
8.3%inclusion1 decks12 decks
-25%synergy
Cephalid Coliseum
8.3%inclusion1 decks12 decks
5%synergy
Nesting Grounds
8.3%inclusion1 decks12 decks
7%synergy
Field of Ruin
8.3%inclusion1 decks12 decks
7%synergy
Mana Artifacts
Arcane Signet
92%inclusion11 decks12 decks
4%synergy
Sol Ring
92%inclusion11 decks12 decks
2%synergy
Azorius Signet
75%inclusion9 decks12 decks
43%synergy
Dimir Signet
67%inclusion8 decks12 decks
34%synergy
Orzhov Signet
67%inclusion8 decks12 decks
32%synergy
Talisman of Progress
50%inclusion6 decks12 decks
7%synergy
Talisman of Dominance
50%inclusion6 decks12 decks
1%synergy
Fellwar Stone
33%inclusion4 decks12 decks
-1%synergy
Talisman of Hierarchy
33%inclusion4 decks12 decks
-10%synergy
Mind Stone
25%inclusion3 decks12 decks
12%synergy
Commander's Sphere
17%inclusion2 decks12 decks
-2%synergy
Charcoal Diamond
8.3%inclusion1 decks12 decks
7%synergy
Altar of the Pantheon
8.3%inclusion1 decks12 decks
8%synergy
Sky Diamond
8.3%inclusion1 decks12 decks
7%synergy
Marble Diamond
8.3%inclusion1 decks12 decks
7%synergy
Lands
Island
100%inclusion12 decks12 decks
7%synergy
Command Tower
92%inclusion11 decks12 decks
-1%synergy
Swamp
92%inclusion11 decks12 decks
0%synergy
Plains
92%inclusion11 decks12 decks
0%synergy
Arcane Sanctum
75%inclusion9 decks12 decks
21%synergy
Exotic Orchard
67%inclusion8 decks12 decks
8%synergy
Caves of Koilos
67%inclusion8 decks12 decks
31%synergy
Glacial Fortress
50%inclusion6 decks12 decks
10%synergy
Contaminated Landscape
50%inclusion6 decks12 decks
36%synergy
Temple of Enlightenment
50%inclusion6 decks12 decks
33%synergy
Adarkar Wastes
50%inclusion6 decks12 decks
19%synergy
Temple of Deceit
42%inclusion5 decks12 decks
24%synergy
Dimir Aqueduct
42%inclusion5 decks12 decks
28%synergy
Underground River
42%inclusion5 decks12 decks
9%synergy
Temple of Silence
42%inclusion5 decks12 decks
22%synergy
Azorius Chancery
33%inclusion4 decks12 decks
19%synergy
Prairie Stream
33%inclusion4 decks12 decks
-7%synergy
Skycloud Expanse
33%inclusion4 decks12 decks
19%synergy
Isolated Chapel
33%inclusion4 decks12 decks
-5%synergy
Drowned Catacomb
33%inclusion4 decks12 decks
-2%synergy
Orzhov Basilica
33%inclusion4 decks12 decks
17%synergy
Terramorphic Expanse
25%inclusion3 decks12 decks
8%synergy
Evolving Wilds
25%inclusion3 decks12 decks
0%synergy
Sunken Hollow
25%inclusion3 decks12 decks
-15%synergy
Obscura Storefront
25%inclusion3 decks12 decks
15%synergy
Tainted Isle
17%inclusion2 decks12 decks
10%synergy
Tainted Field
17%inclusion2 decks12 decks
10%synergy
Port Town
17%inclusion2 decks12 decks
0%synergy
Darkwater Catacombs
17%inclusion2 decks12 decks
2%synergy
Tranquil Cove
17%inclusion2 decks12 decks
10%synergy
Shire Terrace
17%inclusion2 decks12 decks
16%synergy
Valgavoth's Lair
17%inclusion2 decks12 decks
14%synergy
Path of Ancestry
17%inclusion2 decks12 decks
-11%synergy
Murky Sewer
17%inclusion2 decks12 decks
16%synergy
Neglected Manor
17%inclusion2 decks12 decks
16%synergy
Choked Estuary
17%inclusion2 decks12 decks
0%synergy
Fabled Passage
8.3%inclusion1 decks12 decks
1%synergy
Abandoned Campground
8.3%inclusion1 decks12 decks
8%synergy
Myriad Landscape
8.3%inclusion1 decks12 decks
0%synergy
Lonely Arroyo
8.3%inclusion1 decks12 decks
7%synergy
Desolate Mire
8.3%inclusion1 decks12 decks
2%synergy
Irrigated Farmland
8.3%inclusion1 decks12 decks
1%synergy
Dimir Guildgate
8.3%inclusion1 decks12 decks
7%synergy
Orzhov Guildgate
8.3%inclusion1 decks12 decks
7%synergy
Shipwreck Marsh
8.3%inclusion1 decks12 decks
-12%synergy
Esper Panorama
8.3%inclusion1 decks12 decks
5%synergy
Demolition Field
8.3%inclusion1 decks12 decks
4%synergy
Seachrome Coast
8.3%inclusion1 decks12 decks
4%synergy
Azorius Guildgate
8.3%inclusion1 decks12 decks
6%synergy
Shineshadow Snarl
8.3%inclusion1 decks12 decks
-2%synergy
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