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

The Master of Keys
Rank #306
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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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Inquisitive Glimmer
100%inclusion13 decks13 decks
93%synergy
Scrabbling Skullcrab
85%inclusion11 decks13 decks
84%synergy
Starfield Mystic
85%inclusion11 decks13 decks
78%synergy
Mesa Enchantress
85%inclusion11 decks13 decks
76%synergy
Doomwake Giant
77%inclusion10 decks13 decks
71%synergy
Entity Tracker
77%inclusion10 decks13 decks
71%synergy
Gravebreaker Lamia
69%inclusion9 decks13 decks
68%synergy
Demon of Fate's Design
69%inclusion9 decks13 decks
64%synergy
Defiled Crypt // Cadaver Lab
62%inclusion8 decks13 decks
61%synergy
Fear of Impostors
62%inclusion8 decks13 decks
60%synergy
Top Cards
Victor, Valgavoth's Seneschal
62%inclusion8 decks13 decks
60%synergy
Ghostly Dancers
62%inclusion8 decks13 decks
59%synergy
Frantic Search
54%inclusion7 decks13 decks
36%synergy
Sage of Mysteries
54%inclusion7 decks13 decks
54%synergy
Soaring Lightbringer
54%inclusion7 decks13 decks
49%synergy
Central Elevator // Promising Stairs
54%inclusion7 decks13 decks
53%synergy
Fear of Sleep Paralysis
54%inclusion7 decks13 decks
48%synergy
Ethereal Armor
54%inclusion7 decks13 decks
49%synergy
Sevinne's Reclamation
46%inclusion6 decks13 decks
37%synergy
Sigil of the Empty Throne
46%inclusion6 decks13 decks
40%synergy
Game Changers
Bolas's Citadel
7.7%inclusion1 decks13 decks
-2%synergy
Creatures
Silent Hallcreeper
46%inclusion6 decks13 decks
42%synergy
Aminatou, Veil Piercer
46%inclusion6 decks13 decks
45%synergy
Moon-Blessed Cleric
38%inclusion5 decks13 decks
34%synergy
Enduring Curiosity
38%inclusion5 decks13 decks
31%synergy
Gremlin Tamer
38%inclusion5 decks13 decks
37%synergy
Grim Guardian
38%inclusion5 decks13 decks
36%synergy
Ondu Spiritdancer
38%inclusion5 decks13 decks
32%synergy
Zur the Enchanter
38%inclusion5 decks13 decks
33%synergy
Fear of Infinity
31%inclusion4 decks13 decks
30%synergy
Overlord of the Floodpits
31%inclusion4 decks13 decks
27%synergy
Archon of Sun's Grace
31%inclusion4 decks13 decks
26%synergy
Fear of Surveillance
31%inclusion4 decks13 decks
30%synergy
Skullsnap Nuisance
31%inclusion4 decks13 decks
30%synergy
Heliod, the Radiant Dawn
31%inclusion4 decks13 decks
27%synergy
Zur, Eternal Schemer
31%inclusion4 decks13 decks
28%synergy
Mindwrack Harpy
31%inclusion4 decks13 decks
30%synergy
Emet-Selch of the Third Seat
30%inclusion3 decks10 decks
20%synergy
Dreadwing Scavenger
25%inclusion3 decks12 decks
24%synergy
Protean Thaumaturge
23%inclusion3 decks13 decks
23%synergy
Appendage Amalgam
23%inclusion3 decks13 decks
23%synergy
Balemurk Leech
23%inclusion3 decks13 decks
22%synergy
Nightmare Shepherd
23%inclusion3 decks13 decks
21%synergy
Alseid of Life's Bounty
23%inclusion3 decks13 decks
22%synergy
Solemn Simulacrum
15%inclusion2 decks13 decks
1%synergy
Stenn, Paranoid Partisan
15%inclusion2 decks13 decks
14%synergy
Mirrorhall Mimic
15%inclusion2 decks13 decks
15%synergy
The Ancient One
15%inclusion2 decks13 decks
15%synergy
Ashiok's Reaper
15%inclusion2 decks13 decks
15%synergy
Overlord of the Mistmoors
15%inclusion2 decks13 decks
13%synergy
Fear of the Dark
15%inclusion2 decks13 decks
15%synergy
Athreos, Shroud-Veiled
15%inclusion2 decks13 decks
11%synergy
Spirited Companion
15%inclusion2 decks13 decks
13%synergy
Millikin
15%inclusion2 decks13 decks
15%synergy
Callaphe, Beloved of the Sea
15%inclusion2 decks13 decks
14%synergy
Y'shtola, Night's Blessed
9.1%inclusion1 decks11 decks
8%synergy
Emet-Selch, Unsundered
9.1%inclusion1 decks11 decks
8%synergy
Starnheim Courser
7.7%inclusion1 decks13 decks
4%synergy
Phenax, God of Deception
7.7%inclusion1 decks13 decks
7%synergy
Fear of Isolation
7.7%inclusion1 decks13 decks
7%synergy
Heliod's Pilgrim
7.7%inclusion1 decks13 decks
7%synergy
Raff Capashen, Ship's Mage
7.7%inclusion1 decks13 decks
7%synergy
Patrician Geist
7.7%inclusion1 decks13 decks
8%synergy
Glyph Elemental
7.7%inclusion1 decks13 decks
7%synergy
Ian Chesterton
7.7%inclusion1 decks13 decks
8%synergy
Phyrexian Metamorph
7.7%inclusion1 decks13 decks
-1%synergy
Fear of Lost Teeth
7.7%inclusion1 decks13 decks
7%synergy
Baleful Strix
7.7%inclusion1 decks13 decks
-13%synergy
Lord of the Forsaken
7.7%inclusion1 decks13 decks
8%synergy
Hanna, Ship's Navigator
7.7%inclusion1 decks13 decks
5%synergy
Lurrus of the Dream-Den
7.7%inclusion1 decks13 decks
6%synergy
Instants
Otherworldly Gaze
46%inclusion6 decks13 decks
44%synergy
Thirst for Meaning
38%inclusion5 decks13 decks
37%synergy
Swords to Plowshares
38%inclusion5 decks13 decks
-30%synergy
Counterspell
38%inclusion5 decks13 decks
-3%synergy
Void Rend
31%inclusion4 decks13 decks
-3%synergy
Dovin's Veto
23%inclusion3 decks13 decks
-2%synergy
Negate
23%inclusion3 decks13 decks
7%synergy
Brainstorm
15%inclusion2 decks13 decks
-2%synergy
Dark Ritual
15%inclusion2 decks13 decks
-4%synergy
Cancel
15%inclusion2 decks13 decks
14%synergy
Get Out
15%inclusion2 decks13 decks
15%synergy
Path to Exile
15%inclusion2 decks13 decks
-27%synergy
Don't Make a Sound
15%inclusion2 decks13 decks
15%synergy
Refute
8.3%inclusion1 decks12 decks
6%synergy
Hero's Downfall
7.7%inclusion1 decks13 decks
7%synergy
Faith's Reward
7.7%inclusion1 decks13 decks
7%synergy
Return to Dust
7.7%inclusion1 decks13 decks
4%synergy
Essence Scatter
7.7%inclusion1 decks13 decks
7%synergy
Consider
7.7%inclusion1 decks13 decks
5%synergy
Reality Shift
7.7%inclusion1 decks13 decks
6%synergy
Opt
7.7%inclusion1 decks13 decks
4%synergy
Ertai's Scorn
7.7%inclusion1 decks13 decks
7%synergy
Unwanted Remake
7.7%inclusion1 decks13 decks
7%synergy
Murder
7.7%inclusion1 decks13 decks
6%synergy
Hindering Light
7.7%inclusion1 decks13 decks
6%synergy
Glimmerburst
7.7%inclusion1 decks13 decks
7%synergy
Arcane Denial
7.7%inclusion1 decks13 decks
-13%synergy
Anguished Unmaking
7.7%inclusion1 decks13 decks
-18%synergy
Deny Existence
7.7%inclusion1 decks13 decks
8%synergy
Despark
7.7%inclusion1 decks13 decks
-9%synergy
Feed the Cycle
7.7%inclusion1 decks13 decks
8%synergy
Mana Leak
7.7%inclusion1 decks13 decks
6%synergy
Utter End
7.7%inclusion1 decks13 decks
1%synergy
Wrong Turn
7.7%inclusion1 decks13 decks
7%synergy
Spell Pierce
7.7%inclusion1 decks13 decks
5%synergy
Unwind
7.7%inclusion1 decks13 decks
2%synergy
Long River's Pull
7.7%inclusion1 decks13 decks
7%synergy
Rowan's Grim Search
7.7%inclusion1 decks13 decks
8%synergy
Mortify
7.7%inclusion1 decks13 decks
-1%synergy
Sorceries
Extinguish All Hope
38%inclusion5 decks13 decks
37%synergy
Dance of the Manse
38%inclusion5 decks13 decks
35%synergy
Redress Fate
31%inclusion4 decks13 decks
25%synergy
Time Wipe
23%inclusion3 decks13 decks
16%synergy
Feed the Swarm
23%inclusion3 decks13 decks
20%synergy
Read the Bones
15%inclusion2 decks13 decks
11%synergy
Brilliant Restoration
15%inclusion2 decks13 decks
13%synergy
Space-Time Anomaly
10%inclusion1 decks10 decks
8%synergy
Supreme Verdict
7.7%inclusion1 decks13 decks
-7%synergy
Windfall
7.7%inclusion1 decks13 decks
-6%synergy
Requisition Raid
7.7%inclusion1 decks13 decks
7%synergy
Austere Command
7.7%inclusion1 decks13 decks
-1%synergy
Lively Dirge
7.7%inclusion1 decks13 decks
6%synergy
Resurgent Belief
7.7%inclusion1 decks13 decks
6%synergy
Open the Vaults
7.7%inclusion1 decks13 decks
6%synergy
Open the Armory
7.7%inclusion1 decks13 decks
4%synergy
Doomskar
7.7%inclusion1 decks13 decks
7%synergy
Terminus
7.7%inclusion1 decks13 decks
4%synergy
Cut Your Losses
7.7%inclusion1 decks13 decks
7%synergy
Starfall Invocation
7.7%inclusion1 decks13 decks
6%synergy
Night's Whisper
7.7%inclusion1 decks13 decks
5%synergy
Buried Alive
7.7%inclusion1 decks13 decks
4%synergy
Memory Sluice
7.7%inclusion1 decks13 decks
8%synergy
Diresight
7.7%inclusion1 decks13 decks
7%synergy
Mnemonic Betrayal
7.7%inclusion1 decks13 decks
5%synergy
Preordain
7.7%inclusion1 decks13 decks
3%synergy
Damn
7.7%inclusion1 decks13 decks
-13%synergy
Retether
7.7%inclusion1 decks13 decks
6%synergy
Final Vengeance
7.7%inclusion1 decks13 decks
8%synergy
Day of Judgment
7.7%inclusion1 decks13 decks
6%synergy
Unburial Rites
7.7%inclusion1 decks13 decks
5%synergy
Languish
7.7%inclusion1 decks13 decks
7%synergy
Utility Artifacts
Wayfarer's Bauble
38%inclusion5 decks13 decks
31%synergy
Keys to the House
23%inclusion3 decks13 decks
23%synergy
Mirage Mirror
15%inclusion2 decks13 decks
14%synergy
Swiftfoot Boots
15%inclusion2 decks13 decks
-9%synergy
Bident of Thassa
15%inclusion2 decks13 decks
7%synergy
Rescue Skiff
10%inclusion1 decks10 decks
10%synergy
Riverchurn Monument
9.1%inclusion1 decks11 decks
9%synergy
Matzalantli, the Great Door
7.7%inclusion1 decks13 decks
6%synergy
Perpetual Timepiece
7.7%inclusion1 decks13 decks
7%synergy
The Everflowing Well
7.7%inclusion1 decks13 decks
7%synergy
Cloud Key
7.7%inclusion1 decks13 decks
4%synergy
Power Conduit
7.7%inclusion1 decks13 decks
7%synergy
Glimmerlight
7.7%inclusion1 decks13 decks
8%synergy
Codex Shredder
7.7%inclusion1 decks13 decks
7%synergy
Crystal Chimes
7.7%inclusion1 decks13 decks
7%synergy
Enchantments
Meat Locker // Drowned Diner
46%inclusion6 decks13 decks
46%synergy
Sphere of Safety
46%inclusion6 decks13 decks
37%synergy
Cemetery Tampering
46%inclusion6 decks13 decks
45%synergy
All That Glitters
46%inclusion6 decks13 decks
37%synergy
Bottomless Pool // Locker Room
46%inclusion6 decks13 decks
44%synergy
Dazzling Theater // Prop Room
46%inclusion6 decks13 decks
45%synergy
Secret Arcade // Dusty Parlor
46%inclusion6 decks13 decks
41%synergy
Polluted Cistern // Dim Oubliette
46%inclusion6 decks13 decks
46%synergy
Stillness in Motion
40%inclusion4 decks10 decks
40%synergy
Ripples of Undeath
38%inclusion5 decks13 decks
36%synergy
Extravagant Replication
38%inclusion5 decks13 decks
33%synergy
Estrid's Invocation
38%inclusion5 decks13 decks
34%synergy
Derelict Attic // Widow's Walk
38%inclusion5 decks13 decks
38%synergy
Seal of Cleansing
38%inclusion5 decks13 decks
37%synergy
Restricted Office // Lecture Hall
38%inclusion5 decks13 decks
36%synergy
Cramped Vents // Access Maze
31%inclusion4 decks13 decks
28%synergy
Surgical Suite // Hospital Room
31%inclusion4 decks13 decks
30%synergy
Mirrormade
31%inclusion4 decks13 decks
21%synergy
Dress Down
31%inclusion4 decks13 decks
28%synergy
One with the Multiverse
23%inclusion3 decks13 decks
18%synergy
Grasp of Fate
23%inclusion3 decks13 decks
17%synergy
Court of Cunning
23%inclusion3 decks13 decks
22%synergy
Underwater Tunnel // Slimy Aquarium
23%inclusion3 decks13 decks
23%synergy
Copy Enchantment
23%inclusion3 decks13 decks
18%synergy
Funeral Room // Awakening Hall
23%inclusion3 decks13 decks
22%synergy
Secrets of the Dead
23%inclusion3 decks13 decks
23%synergy
Mirror Room // Fractured Realm
23%inclusion3 decks13 decks
21%synergy
Propaganda
23%inclusion3 decks13 decks
-4%synergy
Seal of Removal
23%inclusion3 decks13 decks
22%synergy
Airbender Ascension
17%inclusion1 decks6 decks
16%synergy
Northern Air Temple
17%inclusion1 decks6 decks
17%synergy
The Spirit Oasis
17%inclusion1 decks6 decks
17%synergy
Darksteel Mutation
15%inclusion2 decks13 decks
9%synergy
Staggering Insight
15%inclusion2 decks13 decks
13%synergy
Builder's Talent
15%inclusion2 decks13 decks
15%synergy
Timely Ward
15%inclusion2 decks13 decks
10%synergy
The Tale of Tamiyo
15%inclusion2 decks13 decks
15%synergy
Amphibian Downpour
15%inclusion2 decks13 decks
11%synergy
Fraying Sanity
15%inclusion2 decks13 decks
15%synergy
Enchanted Evening
15%inclusion2 decks13 decks
14%synergy
Ever-Watching Threshold
15%inclusion2 decks13 decks
15%synergy
Dollmaker's Shop // Porcelain Gallery
15%inclusion2 decks13 decks
14%synergy
Ghostly Prison
15%inclusion2 decks13 decks
-7%synergy
Observed Stasis
10%inclusion1 decks10 decks
4%synergy
Chorale of the Void
10%inclusion1 decks10 decks
10%synergy
Southern Air Temple
10%inclusion1 decks10 decks
10%synergy
Twinblade Blessing
8.3%inclusion1 decks12 decks
8%synergy
Demonic Vigor
7.7%inclusion1 decks13 decks
8%synergy
Endless Evil
7.7%inclusion1 decks13 decks
7%synergy
Robe of Mirrors
7.7%inclusion1 decks13 decks
7%synergy
Battles
Invasion of Theros
23%inclusion3 decks13 decks
21%synergy
Planeswalkers
Kaya, Orzhov Usurper
7.7%inclusion1 decks13 decks
8%synergy
Ashiok, Dream Render
7.7%inclusion1 decks13 decks
6%synergy
Utility Lands
Bojuka Bog
31%inclusion4 decks13 decks
4%synergy
Nephalia Drownyard
23%inclusion3 decks13 decks
23%synergy
Ishgard, the Holy See
10%inclusion1 decks10 decks
6%synergy
Mortuary Mire
7.7%inclusion1 decks13 decks
6%synergy
Halimar Depths
7.7%inclusion1 decks13 decks
3%synergy
Duskmantle, House of Shadow
7.7%inclusion1 decks13 decks
8%synergy
Reliquary Tower
7.7%inclusion1 decks13 decks
-26%synergy
Drownyard Temple
7.7%inclusion1 decks13 decks
8%synergy
Cephalid Coliseum
7.7%inclusion1 decks13 decks
4%synergy
Nesting Grounds
7.7%inclusion1 decks13 decks
7%synergy
Field of Ruin
7.7%inclusion1 decks13 decks
7%synergy
Mana Artifacts
Arcane Signet
92%inclusion12 decks13 decks
4%synergy
Sol Ring
85%inclusion11 decks13 decks
-5%synergy
Azorius Signet
69%inclusion9 decks13 decks
38%synergy
Orzhov Signet
54%inclusion7 decks13 decks
20%synergy
Dimir Signet
46%inclusion6 decks13 decks
15%synergy
Talisman of Progress
38%inclusion5 decks13 decks
-5%synergy
Mind Stone
38%inclusion5 decks13 decks
26%synergy
Commander's Sphere
31%inclusion4 decks13 decks
12%synergy
Talisman of Dominance
31%inclusion4 decks13 decks
-19%synergy
Fellwar Stone
23%inclusion3 decks13 decks
-11%synergy
Talisman of Hierarchy
23%inclusion3 decks13 decks
-21%synergy
Sky Diamond
15%inclusion2 decks13 decks
14%synergy
Marble Diamond
15%inclusion2 decks13 decks
14%synergy
Bender's Waterskin
10%inclusion1 decks10 decks
5%synergy
Charcoal Diamond
7.7%inclusion1 decks13 decks
6%synergy
Altar of the Pantheon
7.7%inclusion1 decks13 decks
8%synergy
Lands
Island
100%inclusion13 decks13 decks
7%synergy
Swamp
92%inclusion12 decks13 decks
1%synergy
Plains
92%inclusion12 decks13 decks
1%synergy
Command Tower
85%inclusion11 decks13 decks
-8%synergy
Arcane Sanctum
69%inclusion9 decks13 decks
15%synergy
Glacial Fortress
46%inclusion6 decks13 decks
5%synergy
Exotic Orchard
46%inclusion6 decks13 decks
-12%synergy
Contaminated Landscape
46%inclusion6 decks13 decks
32%synergy
Caves of Koilos
46%inclusion6 decks13 decks
11%synergy
Temple of Enlightenment
46%inclusion6 decks13 decks
30%synergy
Evolving Wilds
46%inclusion6 decks13 decks
21%synergy
Temple of Deceit
38%inclusion5 decks13 decks
21%synergy
Dimir Aqueduct
38%inclusion5 decks13 decks
25%synergy
Temple of Silence
38%inclusion5 decks13 decks
19%synergy
Azorius Chancery
31%inclusion4 decks13 decks
17%synergy
Terramorphic Expanse
31%inclusion4 decks13 decks
14%synergy
Valgavoth's Lair
31%inclusion4 decks13 decks
28%synergy
Skycloud Expanse
31%inclusion4 decks13 decks
16%synergy
Isolated Chapel
31%inclusion4 decks13 decks
-9%synergy
Orzhov Basilica
31%inclusion4 decks13 decks
15%synergy
Adarkar Wastes
31%inclusion4 decks13 decks
-1%synergy
Prairie Stream
23%inclusion3 decks13 decks
-18%synergy
Drowned Catacomb
23%inclusion3 decks13 decks
-13%synergy
Underground River
23%inclusion3 decks13 decks
-10%synergy
Obscura Storefront
23%inclusion3 decks13 decks
13%synergy
Abandoned Campground
15%inclusion2 decks13 decks
15%synergy
Darkwater Catacombs
15%inclusion2 decks13 decks
1%synergy
Tranquil Cove
15%inclusion2 decks13 decks
9%synergy
Shire Terrace
15%inclusion2 decks13 decks
15%synergy
Path of Ancestry
15%inclusion2 decks13 decks
-12%synergy
Murky Sewer
15%inclusion2 decks13 decks
15%synergy
Neglected Manor
15%inclusion2 decks13 decks
15%synergy
Sunken Hollow
15%inclusion2 decks13 decks
-24%synergy
Crossroads Village
10%inclusion1 decks10 decks
9%synergy
Vibrant Cityscape
10%inclusion1 decks10 decks
9%synergy
University Campus
10%inclusion1 decks10 decks
10%synergy
Tainted Isle
7.7%inclusion1 decks13 decks
1%synergy
Fabled Passage
7.7%inclusion1 decks13 decks
0%synergy
Myriad Landscape
7.7%inclusion1 decks13 decks
-1%synergy
Lonely Arroyo
7.7%inclusion1 decks13 decks
7%synergy
Hidden Grotto
7.7%inclusion1 decks13 decks
7%synergy
Desolate Mire
7.7%inclusion1 decks13 decks
1%synergy
Irrigated Farmland
7.7%inclusion1 decks13 decks
0%synergy
Tainted Field
7.7%inclusion1 decks13 decks
1%synergy
Port Town
7.7%inclusion1 decks13 decks
-9%synergy
Dimir Guildgate
7.7%inclusion1 decks13 decks
6%synergy
Warped Landscape
7.7%inclusion1 decks13 decks
8%synergy
Orzhov Guildgate
7.7%inclusion1 decks13 decks
6%synergy
Ash Barrens
7.7%inclusion1 decks13 decks
-3%synergy
Shipwreck Marsh
7.7%inclusion1 decks13 decks
-13%synergy
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