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

The Master of Keys
Rank #302
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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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Paramecia Coloniex
25%inclusion1 decks4 decks
25%synergy
High Synergy Cards
Inquisitive Glimmer
93%inclusion14 decks15 decks
86%synergy
Scrabbling Skullcrab
80%inclusion12 decks15 decks
79%synergy
Mesa Enchantress
87%inclusion13 decks15 decks
78%synergy
Entity Tracker
80%inclusion12 decks15 decks
74%synergy
Demon of Fate's Design
73%inclusion11 decks15 decks
68%synergy
Doomwake Giant
73%inclusion11 decks15 decks
68%synergy
Starfield Mystic
73%inclusion11 decks15 decks
67%synergy
Gravebreaker Lamia
60%inclusion9 decks15 decks
59%synergy
Victor, Valgavoth's Seneschal
60%inclusion9 decks15 decks
58%synergy
Ghostly Dancers
60%inclusion9 decks15 decks
58%synergy
Top Cards
Fear of Sleep Paralysis
60%inclusion9 decks15 decks
55%synergy
Secret Arcade // Dusty Parlor
60%inclusion9 decks15 decks
55%synergy
Frantic Search
53%inclusion8 decks15 decks
35%synergy
Sigil of the Empty Throne
53%inclusion8 decks15 decks
48%synergy
Fear of Impostors
53%inclusion8 decks15 decks
52%synergy
Estrid's Invocation
53%inclusion8 decks15 decks
49%synergy
Central Elevator // Promising Stairs
53%inclusion8 decks15 decks
53%synergy
Cemetery Tampering
53%inclusion8 decks15 decks
53%synergy
Ethereal Armor
53%inclusion8 decks15 decks
49%synergy
Defiled Crypt // Cadaver Lab
53%inclusion8 decks15 decks
53%synergy
Game Changers
Bolas's Citadel
6.7%inclusion1 decks15 decks
-3%synergy
Creatures
Sage of Mysteries
47%inclusion7 decks15 decks
46%synergy
Soaring Lightbringer
47%inclusion7 decks15 decks
42%synergy
Grim Guardian
47%inclusion7 decks15 decks
44%synergy
Silent Hallcreeper
40%inclusion6 decks15 decks
35%synergy
Aminatou, Veil Piercer
40%inclusion6 decks15 decks
39%synergy
Zur, Eternal Schemer
40%inclusion6 decks15 decks
37%synergy
Ondu Spiritdancer
40%inclusion6 decks15 decks
34%synergy
Zur the Enchanter
40%inclusion6 decks15 decks
35%synergy
Overlord of the Floodpits
33%inclusion5 decks15 decks
30%synergy
Archon of Sun's Grace
33%inclusion5 decks15 decks
29%synergy
Moon-Blessed Cleric
33%inclusion5 decks15 decks
29%synergy
Skullsnap Nuisance
33%inclusion5 decks15 decks
33%synergy
Enduring Curiosity
33%inclusion5 decks15 decks
25%synergy
Gremlin Tamer
33%inclusion5 decks15 decks
32%synergy
Mindwrack Harpy
33%inclusion5 decks15 decks
33%synergy
Fear of Infinity
27%inclusion4 decks15 decks
26%synergy
Balemurk Leech
27%inclusion4 decks15 decks
26%synergy
Heliod, the Radiant Dawn
27%inclusion4 decks15 decks
23%synergy
Emet-Selch of the Third Seat
25%inclusion3 decks12 decks
16%synergy
Dreadwing Scavenger
21%inclusion3 decks14 decks
21%synergy
Protean Thaumaturge
20%inclusion3 decks15 decks
19%synergy
Fear of Surveillance
20%inclusion3 decks15 decks
20%synergy
Spirited Companion
20%inclusion3 decks15 decks
18%synergy
Appendage Amalgam
20%inclusion3 decks15 decks
20%synergy
Archetype of Imagination
20%inclusion3 decks15 decks
15%synergy
Nightmare Shepherd
20%inclusion3 decks15 decks
18%synergy
Alseid of Life's Bounty
20%inclusion3 decks15 decks
19%synergy
Solemn Simulacrum
13%inclusion2 decks15 decks
0%synergy
Stenn, Paranoid Partisan
13%inclusion2 decks15 decks
12%synergy
Ian Chesterton
13%inclusion2 decks15 decks
13%synergy
Go-Shintai of Shared Purpose
13%inclusion2 decks15 decks
13%synergy
Mirrorhall Mimic
13%inclusion2 decks15 decks
13%synergy
The Ancient One
13%inclusion2 decks15 decks
13%synergy
Ashiok's Reaper
13%inclusion2 decks15 decks
13%synergy
Overlord of the Mistmoors
13%inclusion2 decks15 decks
11%synergy
Stitcher's Supplier
13%inclusion2 decks15 decks
13%synergy
Fear of the Dark
13%inclusion2 decks15 decks
13%synergy
Athreos, Shroud-Veiled
13%inclusion2 decks15 decks
9%synergy
Thassa's Devourer
13%inclusion2 decks15 decks
13%synergy
Go-Shintai of Lost Wisdom
13%inclusion2 decks15 decks
13%synergy
Millikin
13%inclusion2 decks15 decks
13%synergy
Callaphe, Beloved of the Sea
13%inclusion2 decks15 decks
12%synergy
Go-Shintai of Hidden Cruelty
13%inclusion2 decks15 decks
13%synergy
Summon: Ixion
8.3%inclusion1 decks12 decks
8%synergy
Summon: Yojimbo
8.3%inclusion1 decks12 decks
7%synergy
The Warring Triad
8.3%inclusion1 decks12 decks
8%synergy
Y'shtola, Night's Blessed
7.7%inclusion1 decks13 decks
6%synergy
Emet-Selch, Unsundered
7.7%inclusion1 decks13 decks
7%synergy
Starnheim Courser
6.7%inclusion1 decks15 decks
3%synergy
Optimistic Scavenger
6.7%inclusion1 decks15 decks
6%synergy
Instants
Thirst for Meaning
40%inclusion6 decks15 decks
39%synergy
Void Rend
33%inclusion5 decks15 decks
-1%synergy
Swords to Plowshares
33%inclusion5 decks15 decks
-35%synergy
Otherworldly Gaze
33%inclusion5 decks15 decks
31%synergy
Counterspell
33%inclusion5 decks15 decks
-8%synergy
Dovin's Veto
20%inclusion3 decks15 decks
-6%synergy
Negate
20%inclusion3 decks15 decks
4%synergy
Brainstorm
13%inclusion2 decks15 decks
-4%synergy
Dark Ritual
13%inclusion2 decks15 decks
-6%synergy
Cancel
13%inclusion2 decks15 decks
12%synergy
Get Out
13%inclusion2 decks15 decks
13%synergy
Utter End
13%inclusion2 decks15 decks
7%synergy
Path to Exile
13%inclusion2 decks15 decks
-29%synergy
Long River's Pull
13%inclusion2 decks15 decks
13%synergy
Don't Make a Sound
13%inclusion2 decks15 decks
13%synergy
Refute
7.1%inclusion1 decks14 decks
5%synergy
Hero's Downfall
6.7%inclusion1 decks15 decks
6%synergy
Faith's Reward
6.7%inclusion1 decks15 decks
6%synergy
Return to Dust
6.7%inclusion1 decks15 decks
3%synergy
Essence Scatter
6.7%inclusion1 decks15 decks
6%synergy
Consider
6.7%inclusion1 decks15 decks
4%synergy
Reality Shift
6.7%inclusion1 decks15 decks
5%synergy
Opt
6.7%inclusion1 decks15 decks
3%synergy
Ertai's Scorn
6.7%inclusion1 decks15 decks
6%synergy
Unwanted Remake
6.7%inclusion1 decks15 decks
6%synergy
Murder
6.7%inclusion1 decks15 decks
5%synergy
Hindering Light
6.7%inclusion1 decks15 decks
5%synergy
Stroke of Midnight
6.7%inclusion1 decks15 decks
-1%synergy
Glimmerburst
6.7%inclusion1 decks15 decks
6%synergy
Arcane Denial
6.7%inclusion1 decks15 decks
-14%synergy
Anguished Unmaking
6.7%inclusion1 decks15 decks
-19%synergy
Deny Existence
6.7%inclusion1 decks15 decks
7%synergy
Despark
6.7%inclusion1 decks15 decks
-9%synergy
Feed the Cycle
6.7%inclusion1 decks15 decks
7%synergy
Mana Leak
6.7%inclusion1 decks15 decks
5%synergy
Wrong Turn
6.7%inclusion1 decks15 decks
6%synergy
Spell Pierce
6.7%inclusion1 decks15 decks
4%synergy
Unwind
6.7%inclusion1 decks15 decks
1%synergy
Rowan's Grim Search
6.7%inclusion1 decks15 decks
7%synergy
Mortify
6.7%inclusion1 decks15 decks
-2%synergy
Sorceries
Sevinne's Reclamation
40%inclusion6 decks15 decks
31%synergy
Extinguish All Hope
40%inclusion6 decks15 decks
38%synergy
Dance of the Manse
33%inclusion5 decks15 decks
30%synergy
Feed the Swarm
27%inclusion4 decks15 decks
24%synergy
Redress Fate
27%inclusion4 decks15 decks
21%synergy
Read the Bones
20%inclusion3 decks15 decks
16%synergy
Time Wipe
13%inclusion2 decks15 decks
7%synergy
Night's Whisper
13%inclusion2 decks15 decks
11%synergy
Brilliant Restoration
13%inclusion2 decks15 decks
12%synergy
Diresight
13%inclusion2 decks15 decks
13%synergy
Space-Time Anomaly
8.3%inclusion1 decks12 decks
7%synergy
Risky Research
8.3%inclusion1 decks12 decks
8%synergy
Supreme Verdict
6.7%inclusion1 decks15 decks
-8%synergy
Windfall
6.7%inclusion1 decks15 decks
-7%synergy
Requisition Raid
6.7%inclusion1 decks15 decks
6%synergy
Austere Command
6.7%inclusion1 decks15 decks
-2%synergy
Lively Dirge
6.7%inclusion1 decks15 decks
5%synergy
Resurgent Belief
6.7%inclusion1 decks15 decks
5%synergy
Open the Vaults
6.7%inclusion1 decks15 decks
5%synergy
Open the Armory
6.7%inclusion1 decks15 decks
3%synergy
Doomskar
6.7%inclusion1 decks15 decks
6%synergy
Terminus
6.7%inclusion1 decks15 decks
3%synergy
Cut Your Losses
6.7%inclusion1 decks15 decks
6%synergy
Glimpse the Unthinkable
6.7%inclusion1 decks15 decks
6%synergy
Vindicate
6.7%inclusion1 decks15 decks
-4%synergy
Starfall Invocation
6.7%inclusion1 decks15 decks
5%synergy
Exsanguinate
6.7%inclusion1 decks15 decks
0%synergy
Buried Alive
6.7%inclusion1 decks15 decks
3%synergy
Memory Sluice
6.7%inclusion1 decks15 decks
7%synergy
Vanquish the Horde
6.7%inclusion1 decks15 decks
4%synergy
Preordain
6.7%inclusion1 decks15 decks
2%synergy
Damn
6.7%inclusion1 decks15 decks
-14%synergy
Retether
6.7%inclusion1 decks15 decks
5%synergy
Sign in Blood
6.7%inclusion1 decks15 decks
4%synergy
Final Vengeance
6.7%inclusion1 decks15 decks
6%synergy
Day of Judgment
6.7%inclusion1 decks15 decks
5%synergy
Unburial Rites
6.7%inclusion1 decks15 decks
4%synergy
Languish
6.7%inclusion1 decks15 decks
6%synergy
Utility Artifacts
Wayfarer's Bauble
27%inclusion4 decks15 decks
19%synergy
Keys to the House
20%inclusion3 decks15 decks
20%synergy
Bident of Thassa
20%inclusion3 decks15 decks
11%synergy
Perpetual Timepiece
13%inclusion2 decks15 decks
13%synergy
Mirage Mirror
13%inclusion2 decks15 decks
12%synergy
Swiftfoot Boots
13%inclusion2 decks15 decks
-11%synergy
Rescue Skiff
8.3%inclusion1 decks12 decks
8%synergy
Riverchurn Monument
7.7%inclusion1 decks13 decks
7%synergy
Matzalantli, the Great Door
6.7%inclusion1 decks15 decks
5%synergy
The Everflowing Well
6.7%inclusion1 decks15 decks
6%synergy
Cloud Key
6.7%inclusion1 decks15 decks
3%synergy
Power Conduit
6.7%inclusion1 decks15 decks
6%synergy
Glimmerlight
6.7%inclusion1 decks15 decks
7%synergy
Codex Shredder
6.7%inclusion1 decks15 decks
6%synergy
Crystal Chimes
6.7%inclusion1 decks15 decks
6%synergy
Enchantments
Stillness in Motion
50%inclusion6 decks12 decks
50%synergy
All That Glitters
47%inclusion7 decks15 decks
38%synergy
Dazzling Theater // Prop Room
47%inclusion7 decks15 decks
45%synergy
Extravagant Replication
40%inclusion6 decks15 decks
35%synergy
Sphere of Safety
40%inclusion6 decks15 decks
31%synergy
Seal of Cleansing
40%inclusion6 decks15 decks
39%synergy
Bottomless Pool // Locker Room
40%inclusion6 decks15 decks
38%synergy
Polluted Cistern // Dim Oubliette
40%inclusion6 decks15 decks
39%synergy
Ripples of Undeath
33%inclusion5 decks15 decks
31%synergy
Meat Locker // Drowned Diner
33%inclusion5 decks15 decks
33%synergy
Derelict Attic // Widow's Walk
33%inclusion5 decks15 decks
33%synergy
Restricted Office // Lecture Hall
33%inclusion5 decks15 decks
31%synergy
Dress Down
33%inclusion5 decks15 decks
31%synergy
Grasp of Fate
27%inclusion4 decks15 decks
21%synergy
Cramped Vents // Access Maze
27%inclusion4 decks15 decks
24%synergy
Surgical Suite // Hospital Room
27%inclusion4 decks15 decks
26%synergy
Mirrormade
27%inclusion4 decks15 decks
17%synergy
Copy Enchantment
27%inclusion4 decks15 decks
22%synergy
The Tale of Tamiyo
27%inclusion4 decks15 decks
26%synergy
Mirror Room // Fractured Realm
27%inclusion4 decks15 decks
24%synergy
Darksteel Mutation
20%inclusion3 decks15 decks
14%synergy
One with the Multiverse
20%inclusion3 decks15 decks
15%synergy
Court of Cunning
20%inclusion3 decks15 decks
19%synergy
Underwater Tunnel // Slimy Aquarium
20%inclusion3 decks15 decks
20%synergy
Elspeth Conquers Death
20%inclusion3 decks15 decks
19%synergy
Funeral Room // Awakening Hall
20%inclusion3 decks15 decks
19%synergy
Secrets of the Dead
20%inclusion3 decks15 decks
20%synergy
Propaganda
20%inclusion3 decks15 decks
-8%synergy
Seal of Removal
20%inclusion3 decks15 decks
19%synergy
Southern Air Temple
17%inclusion2 decks12 decks
17%synergy
The Death of Gwen Stacy
17%inclusion2 decks12 decks
17%synergy
Noggle the Mind
17%inclusion1 decks6 decks
16%synergy
Staggering Insight
13%inclusion2 decks15 decks
11%synergy
Builder's Talent
13%inclusion2 decks15 decks
13%synergy
Honden of Cleansing Fire
13%inclusion2 decks15 decks
13%synergy
Sanctum of Calm Waters
13%inclusion2 decks15 decks
13%synergy
Cacophony Unleashed
13%inclusion2 decks15 decks
12%synergy
King Narfi's Betrayal
13%inclusion2 decks15 decks
13%synergy
Honden of Night's Reach
13%inclusion2 decks15 decks
13%synergy
Honden of Seeing Winds
13%inclusion2 decks15 decks
13%synergy
The War in Heaven
13%inclusion2 decks15 decks
13%synergy
Timely Ward
13%inclusion2 decks15 decks
8%synergy
Sanctum of Stone Fangs
13%inclusion2 decks15 decks
13%synergy
Amphibian Downpour
13%inclusion2 decks15 decks
9%synergy
Fraying Sanity
13%inclusion2 decks15 decks
13%synergy
Tale of Tinúviel
13%inclusion2 decks15 decks
13%synergy
Enchanted Evening
13%inclusion2 decks15 decks
12%synergy
Ever-Watching Threshold
13%inclusion2 decks15 decks
13%synergy
One Ring to Rule Them All
13%inclusion2 decks15 decks
13%synergy
Historian's Boon
13%inclusion2 decks15 decks
13%synergy
Battles
Invasion of Theros
20%inclusion3 decks15 decks
18%synergy
Planeswalkers
Kaya, Orzhov Usurper
6.7%inclusion1 decks15 decks
7%synergy
Ashiok, Dream Render
6.7%inclusion1 decks15 decks
5%synergy
Utility Lands
Bojuka Bog
27%inclusion4 decks15 decks
0%synergy
Nephalia Drownyard
20%inclusion3 decks15 decks
20%synergy
Ishgard, the Holy See
8.3%inclusion1 decks12 decks
5%synergy
Mortuary Mire
6.7%inclusion1 decks15 decks
5%synergy
Halimar Depths
6.7%inclusion1 decks15 decks
2%synergy
Duskmantle, House of Shadow
6.7%inclusion1 decks15 decks
7%synergy
Reliquary Tower
6.7%inclusion1 decks15 decks
-27%synergy
Drownyard Temple
6.7%inclusion1 decks15 decks
6%synergy
Cephalid Coliseum
6.7%inclusion1 decks15 decks
3%synergy
Nesting Grounds
6.7%inclusion1 decks15 decks
6%synergy
Field of Ruin
6.7%inclusion1 decks15 decks
6%synergy
Mana Artifacts
Arcane Signet
93%inclusion14 decks15 decks
6%synergy
Sol Ring
80%inclusion12 decks15 decks
-10%synergy
Azorius Signet
67%inclusion10 decks15 decks
36%synergy
Dimir Signet
53%inclusion8 decks15 decks
22%synergy
Orzhov Signet
53%inclusion8 decks15 decks
21%synergy
Talisman of Progress
47%inclusion7 decks15 decks
3%synergy
Talisman of Dominance
40%inclusion6 decks15 decks
-10%synergy
Talisman of Hierarchy
33%inclusion5 decks15 decks
-11%synergy
Mind Stone
33%inclusion5 decks15 decks
21%synergy
Commander's Sphere
27%inclusion4 decks15 decks
9%synergy
Fellwar Stone
27%inclusion4 decks15 decks
-7%synergy
Charcoal Diamond
13%inclusion2 decks15 decks
12%synergy
Sky Diamond
13%inclusion2 decks15 decks
12%synergy
Marble Diamond
13%inclusion2 decks15 decks
12%synergy
Bender's Waterskin
8.3%inclusion1 decks12 decks
3%synergy
Altar of the Pantheon
6.7%inclusion1 decks15 decks
7%synergy
Lands
Island
100%inclusion15 decks15 decks
7%synergy
Swamp
93%inclusion14 decks15 decks
2%synergy
Plains
93%inclusion14 decks15 decks
2%synergy
Command Tower
87%inclusion13 decks15 decks
-6%synergy
Arcane Sanctum
67%inclusion10 decks15 decks
12%synergy
Caves of Koilos
53%inclusion8 decks15 decks
18%synergy
Glacial Fortress
47%inclusion7 decks15 decks
5%synergy
Exotic Orchard
47%inclusion7 decks15 decks
-12%synergy
Contaminated Landscape
47%inclusion7 decks15 decks
33%synergy
Temple of Enlightenment
40%inclusion6 decks15 decks
24%synergy
Evolving Wilds
40%inclusion6 decks15 decks
15%synergy
Adarkar Wastes
40%inclusion6 decks15 decks
8%synergy
Temple of Deceit
33%inclusion5 decks15 decks
16%synergy
Dimir Aqueduct
33%inclusion5 decks15 decks
20%synergy
Valgavoth's Lair
33%inclusion5 decks15 decks
31%synergy
Isolated Chapel
33%inclusion5 decks15 decks
-7%synergy
Drowned Catacomb
33%inclusion5 decks15 decks
-4%synergy
Underground River
33%inclusion5 decks15 decks
-1%synergy
Temple of Silence
33%inclusion5 decks15 decks
15%synergy
Terramorphic Expanse
27%inclusion4 decks15 decks
11%synergy
Prairie Stream
27%inclusion4 decks15 decks
-14%synergy
Skycloud Expanse
27%inclusion4 decks15 decks
12%synergy
Orzhov Basilica
27%inclusion4 decks15 decks
11%synergy
Azorius Chancery
20%inclusion3 decks15 decks
6%synergy
Obscura Storefront
20%inclusion3 decks15 decks
10%synergy
Tainted Isle
13%inclusion2 decks15 decks
7%synergy
Abandoned Campground
13%inclusion2 decks15 decks
13%synergy
Port Town
13%inclusion2 decks15 decks
-4%synergy
Darkwater Catacombs
13%inclusion2 decks15 decks
-1%synergy
Tranquil Cove
13%inclusion2 decks15 decks
7%synergy
Shire Terrace
13%inclusion2 decks15 decks
13%synergy
Path of Ancestry
13%inclusion2 decks15 decks
-14%synergy
Murky Sewer
13%inclusion2 decks15 decks
13%synergy
Neglected Manor
13%inclusion2 decks15 decks
13%synergy
Sunken Hollow
13%inclusion2 decks15 decks
-26%synergy
Choked Estuary
13%inclusion2 decks15 decks
-3%synergy
Crossroads Village
8.3%inclusion1 decks12 decks
8%synergy
Vibrant Cityscape
8.3%inclusion1 decks12 decks
7%synergy
University Campus
8.3%inclusion1 decks12 decks
8%synergy
Bleachbone Verge
7.7%inclusion1 decks13 decks
-1%synergy
Fabled Passage
6.7%inclusion1 decks15 decks
-1%synergy
Myriad Landscape
6.7%inclusion1 decks15 decks
-1%synergy
Lonely Arroyo
6.7%inclusion1 decks15 decks
6%synergy
Hidden Grotto
6.7%inclusion1 decks15 decks
6%synergy
Desolate Mire
6.7%inclusion1 decks15 decks
0%synergy
Irrigated Farmland
6.7%inclusion1 decks15 decks
-1%synergy
Tainted Field
6.7%inclusion1 decks15 decks
0%synergy
Dimir Guildgate
6.7%inclusion1 decks15 decks
5%synergy
Warped Landscape
6.7%inclusion1 decks15 decks
7%synergy
Orzhov Guildgate
6.7%inclusion1 decks15 decks
5%synergy
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