The Master of Keys (Commander) - Budget 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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Utility Lands
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Waterbender Ascension
25%inclusion1 decks4 decks
24%synergy
Airbender Ascension
14%inclusion1 decks7 decks
14%synergy
High Synergy Cards
Scrabbling Skullcrab
85%inclusion23 decks27 decks
84%synergy
Inquisitive Glimmer
89%inclusion24 decks27 decks
81%synergy
Starfield Mystic
74%inclusion20 decks27 decks
67%synergy
Doomwake Giant
70%inclusion19 decks27 decks
64%synergy
Mesa Enchantress
70%inclusion19 decks27 decks
61%synergy
Victor, Valgavoth's Seneschal
63%inclusion17 decks27 decks
61%synergy
Fear of Impostors
59%inclusion16 decks27 decks
58%synergy
Defiled Crypt // Cadaver Lab
56%inclusion15 decks27 decks
55%synergy
The Tale of Tamiyo
52%inclusion14 decks27 decks
51%synergy
Cemetery Tampering
52%inclusion14 decks27 decks
51%synergy
Top Cards
Fear of Sleep Paralysis
56%inclusion15 decks27 decks
50%synergy
Entity Tracker
56%inclusion15 decks27 decks
49%synergy
Demon of Fate's Design
52%inclusion14 decks27 decks
46%synergy
Sigil of the Empty Throne
48%inclusion13 decks27 decks
42%synergy
Swords to Plowshares
48%inclusion13 decks27 decks
-20%synergy
Heliod, the Radiant Dawn
48%inclusion13 decks27 decks
44%synergy
Secret Arcade // Dusty Parlor
48%inclusion13 decks27 decks
43%synergy
Soaring Lightbringer
44%inclusion12 decks27 decks
39%synergy
Sphere of Safety
44%inclusion12 decks27 decks
35%synergy
Aminatou, Veil Piercer
44%inclusion12 decks27 decks
43%synergy
Creatures
Ghostly Dancers
44%inclusion12 decks27 decks
42%synergy
Sage of Mysteries
41%inclusion11 decks27 decks
40%synergy
Skullsnap Nuisance
37%inclusion10 decks27 decks
37%synergy
Gravebreaker Lamia
33%inclusion9 decks27 decks
32%synergy
Moon-Blessed Cleric
33%inclusion9 decks27 decks
29%synergy
Archetype of Imagination
33%inclusion9 decks27 decks
29%synergy
Ondu Spiritdancer
33%inclusion9 decks27 decks
27%synergy
Archon of Sun's Grace
30%inclusion8 decks27 decks
25%synergy
Overlord of the Floodpits
26%inclusion7 decks27 decks
22%synergy
Silent Hallcreeper
26%inclusion7 decks27 decks
22%synergy
Spirited Companion
22%inclusion6 decks27 decks
20%synergy
Enduring Curiosity
22%inclusion6 decks27 decks
15%synergy
Balemurk Leech
22%inclusion6 decks27 decks
21%synergy
Creeping Peeper
22%inclusion6 decks27 decks
22%synergy
Grim Guardian
22%inclusion6 decks27 decks
20%synergy
Alseid of Life's Bounty
22%inclusion6 decks27 decks
21%synergy
Mindwrack Harpy
22%inclusion6 decks27 decks
22%synergy
Gremlin Tamer
19%inclusion5 decks27 decks
17%synergy
Nashi, Searcher in the Dark
19%inclusion5 decks27 decks
18%synergy
Nightmare Shepherd
19%inclusion5 decks27 decks
16%synergy
Auramancer
19%inclusion5 decks27 decks
15%synergy
Abdel Adrian, Gorion's Ward
19%inclusion5 decks27 decks
17%synergy
Solemn Simulacrum
15%inclusion4 decks27 decks
-1%synergy
Starnheim Courser
15%inclusion4 decks27 decks
11%synergy
Agent of Erebos
15%inclusion4 decks27 decks
14%synergy
Overlord of the Balemurk
15%inclusion4 decks27 decks
13%synergy
Ashiok's Reaper
15%inclusion4 decks27 decks
14%synergy
Zur, Eternal Schemer
15%inclusion4 decks27 decks
12%synergy
Zur the Enchanter
15%inclusion4 decks27 decks
10%synergy
Millikin
15%inclusion4 decks27 decks
14%synergy
The Mindskinner
11%inclusion3 decks27 decks
10%synergy
The Ancient One
11%inclusion3 decks27 decks
11%synergy
Overlord of the Mistmoors
11%inclusion3 decks27 decks
9%synergy
Vega, the Watcher
11%inclusion3 decks27 decks
9%synergy
Athreos, Shroud-Veiled
11%inclusion3 decks27 decks
7%synergy
Arvinox, the Mind Flail
11%inclusion3 decks27 decks
9%synergy
Laboratory Maniac
11%inclusion3 decks27 decks
8%synergy
Underworld Coinsmith
11%inclusion3 decks27 decks
10%synergy
Ancient Cellarspawn
11%inclusion3 decks27 decks
8%synergy
Thassa's Devourer
11%inclusion3 decks27 decks
11%synergy
Ghostly Keybearer
11%inclusion3 decks27 decks
11%synergy
Callaphe, Beloved of the Sea
11%inclusion3 decks27 decks
10%synergy
Neerdiv, Devious Diver
8.7%inclusion2 decks23 decks
9%synergy
Dreadwing Scavenger
8.7%inclusion2 decks23 decks
8%synergy
Metamorphosis Fanatic
7.4%inclusion2 decks27 decks
3%synergy
Optimistic Scavenger
7.4%inclusion2 decks27 decks
7%synergy
Fear of Infinity
7.4%inclusion2 decks27 decks
7%synergy
Stenn, Paranoid Partisan
7.4%inclusion2 decks27 decks
6%synergy
Lotho, Corrupt Shirriff
7.4%inclusion2 decks27 decks
-9%synergy
Syr Konrad, the Grim
7.4%inclusion2 decks27 decks
1%synergy
Instants
Otherworldly Gaze
41%inclusion11 decks27 decks
38%synergy
Thirst for Meaning
37%inclusion10 decks27 decks
35%synergy
Counterspell
37%inclusion10 decks27 decks
-4%synergy
Arcane Denial
26%inclusion7 decks27 decks
6%synergy
Frantic Search
22%inclusion6 decks27 decks
5%synergy
Negate
22%inclusion6 decks27 decks
6%synergy
Path to Exile
22%inclusion6 decks27 decks
-20%synergy
Dovin's Veto
19%inclusion5 decks27 decks
-6%synergy
Return to Dust
19%inclusion5 decks27 decks
15%synergy
Fact or Fiction
19%inclusion5 decks27 decks
15%synergy
Utter End
19%inclusion5 decks27 decks
11%synergy
Telling Time
11%inclusion3 decks27 decks
9%synergy
An Offer You Can't Refuse
11%inclusion3 decks27 decks
-15%synergy
Brainstorm
11%inclusion3 decks27 decks
-6%synergy
Get Out
11%inclusion3 decks27 decks
11%synergy
Faithful Mending
11%inclusion3 decks27 decks
7%synergy
Inkshield
11%inclusion3 decks27 decks
2%synergy
Waterlogged Teachings
11%inclusion3 decks27 decks
7%synergy
Dark Ritual
7.4%inclusion2 decks27 decks
-12%synergy
Darkblast
7.4%inclusion2 decks27 decks
7%synergy
Forbidden Alchemy
7.4%inclusion2 decks27 decks
7%synergy
Void Rend
7.4%inclusion2 decks27 decks
-26%synergy
Delay
7.4%inclusion2 decks27 decks
5%synergy
Disenchant
7.4%inclusion2 decks27 decks
6%synergy
Anguished Unmaking
7.4%inclusion2 decks27 decks
-17%synergy
Ice Out
7.4%inclusion2 decks27 decks
7%synergy
Restoration Magic
6.7%inclusion1 decks15 decks
5%synergy
Swallowed by Leviathan
6.7%inclusion1 decks15 decks
6%synergy
Dreams of Laguna
5.9%inclusion1 decks17 decks
6%synergy
Sorceries
Redress Fate
44%inclusion12 decks27 decks
38%synergy
Sevinne's Reclamation
30%inclusion8 decks27 decks
21%synergy
Extinguish All Hope
30%inclusion8 decks27 decks
28%synergy
Singularity Rupture
23%inclusion3 decks13 decks
21%synergy
Demonic Counsel
22%inclusion6 decks27 decks
21%synergy
Dance of the Manse
22%inclusion6 decks27 decks
18%synergy
Commune with Evil
19%inclusion5 decks27 decks
18%synergy
Space-Time Anomaly
15%inclusion2 decks13 decks
14%synergy
Time Wipe
15%inclusion4 decks27 decks
8%synergy
Ponder
11%inclusion3 decks27 decks
2%synergy
Windfall
11%inclusion3 decks27 decks
-3%synergy
Resurgent Belief
11%inclusion3 decks27 decks
9%synergy
Terminus
11%inclusion3 decks27 decks
7%synergy
Glimpse the Unthinkable
11%inclusion3 decks27 decks
11%synergy
Diabolic Vision
11%inclusion3 decks27 decks
9%synergy
Lively Dirge
7.4%inclusion2 decks27 decks
6%synergy
Triumphant Reckoning
7.4%inclusion2 decks27 decks
7%synergy
Wrath of God
7.4%inclusion2 decks27 decks
3%synergy
Night's Whisper
7.4%inclusion2 decks27 decks
5%synergy
Buried Alive
7.4%inclusion2 decks27 decks
3%synergy
Brilliant Restoration
7.4%inclusion2 decks27 decks
5%synergy
Rite of Oblivion
7.4%inclusion2 decks27 decks
7%synergy
Living Death
7.4%inclusion2 decks27 decks
3%synergy
Toxic Deluge
7.4%inclusion2 decks27 decks
-12%synergy
Aminatou's Augury
7.4%inclusion2 decks27 decks
6%synergy
Final Vengeance
7.4%inclusion2 decks27 decks
7%synergy
Day of Judgment
7.4%inclusion2 decks27 decks
6%synergy
Unburial Rites
7.4%inclusion2 decks27 decks
4%synergy
Traumatize
7.4%inclusion2 decks27 decks
7%synergy
Utility Artifacts
Keys to the House
26%inclusion7 decks27 decks
26%synergy
Brainstone
11%inclusion3 decks27 decks
10%synergy
Enchantments
Seal of Removal
44%inclusion12 decks27 decks
44%synergy
Seal of Cleansing
41%inclusion11 decks27 decks
39%synergy
Dress Down
37%inclusion10 decks27 decks
34%synergy
Grasp of Fate
33%inclusion9 decks27 decks
27%synergy
Ripples of Undeath
33%inclusion9 decks27 decks
31%synergy
Extravagant Replication
33%inclusion9 decks27 decks
28%synergy
Shark Typhoon
33%inclusion9 decks27 decks
27%synergy
Propaganda
33%inclusion9 decks27 decks
7%synergy
Stillness in Motion
30%inclusion6 decks20 decks
30%synergy
Seal of Doom
30%inclusion8 decks27 decks
29%synergy
Mirrormade
30%inclusion8 decks27 decks
20%synergy
Central Elevator // Promising Stairs
30%inclusion8 decks27 decks
29%synergy
Restricted Office // Lecture Hall
30%inclusion8 decks27 decks
27%synergy
Bottomless Pool // Locker Room
30%inclusion8 decks27 decks
27%synergy
Derelict Attic // Widow's Walk
27%inclusion7 decks26 decks
26%synergy
Underwater Tunnel // Slimy Aquarium
26%inclusion7 decks27 decks
26%synergy
Imprisoned in the Moon
26%inclusion7 decks27 decks
19%synergy
The Eldest Reborn
26%inclusion7 decks27 decks
23%synergy
Surgical Suite // Hospital Room
26%inclusion7 decks27 decks
26%synergy
Amphibian Downpour
26%inclusion7 decks27 decks
21%synergy
All That Glitters
26%inclusion7 decks27 decks
17%synergy
Monologue Tax
26%inclusion7 decks27 decks
20%synergy
Secrets of the Dead
26%inclusion7 decks27 decks
26%synergy
Polluted Cistern // Dim Oubliette
26%inclusion7 decks27 decks
25%synergy
Ethereal Armor
26%inclusion7 decks27 decks
21%synergy
Cramped Vents // Access Maze
22%inclusion6 decks27 decks
19%synergy
Mirror Room // Fractured Realm
22%inclusion6 decks27 decks
20%synergy
Phyrexian Arena
22%inclusion6 decks27 decks
8%synergy
Meat Locker // Drowned Diner
19%inclusion5 decks26 decks
19%synergy
Darksteel Mutation
19%inclusion5 decks27 decks
12%synergy
Cacophony Unleashed
19%inclusion5 decks27 decks
17%synergy
Estrid's Invocation
19%inclusion5 decks27 decks
14%synergy
Mystic Remora
19%inclusion5 decks27 decks
-3%synergy
Timely Ward
19%inclusion5 decks27 decks
14%synergy
The Restoration of Eiganjo
19%inclusion5 decks27 decks
18%synergy
Witness Protection
19%inclusion5 decks27 decks
17%synergy
Static Prison
19%inclusion5 decks27 decks
18%synergy
Animate Dead
19%inclusion5 decks27 decks
9%synergy
Dazzling Theater // Prop Room
19%inclusion5 decks27 decks
17%synergy
Nowhere to Run
19%inclusion5 decks27 decks
17%synergy
Founding the Third Path
15%inclusion4 decks27 decks
15%synergy
Trapped in the Screen
15%inclusion4 decks27 decks
14%synergy
Court of Cunning
15%inclusion4 decks27 decks
14%synergy
Unable to Scream
15%inclusion4 decks27 decks
14%synergy
Tinybones Joins Up
15%inclusion4 decks27 decks
14%synergy
Touch the Spirit Realm
15%inclusion4 decks27 decks
12%synergy
Hopeless Nightmare
15%inclusion4 decks27 decks
15%synergy
Necromancy
15%inclusion4 decks27 decks
10%synergy
Spirit-Sister's Call
15%inclusion4 decks27 decks
14%synergy
Ghostly Prison
15%inclusion4 decks27 decks
-7%synergy
Battles
Invasion of Theros
15%inclusion4 decks27 decks
13%synergy
Utility Lands
Bojuka Bog
52%inclusion14 decks27 decks
24%synergy
Hall of Heliod's Generosity
33%inclusion9 decks27 decks
20%synergy
Halimar Depths
15%inclusion4 decks27 decks
10%synergy
Nephalia Drownyard
15%inclusion4 decks27 decks
14%synergy
Drownyard Temple
15%inclusion4 decks27 decks
15%synergy
Cephalid Coliseum
11%inclusion3 decks27 decks
8%synergy
Restless Anchorage
7.4%inclusion2 decks27 decks
6%synergy
Dalkovan Encampment
5.0%inclusion1 decks20 decks
5%synergy
Mana Artifacts
Sol Ring
89%inclusion24 decks27 decks
-1%synergy
Arcane Signet
85%inclusion23 decks27 decks
-3%synergy
Orzhov Signet
70%inclusion19 decks27 decks
35%synergy
Azorius Signet
63%inclusion17 decks27 decks
30%synergy
Talisman of Progress
44%inclusion12 decks27 decks
2%synergy
Dimir Signet
37%inclusion10 decks27 decks
4%synergy
Talisman of Dominance
33%inclusion9 decks27 decks
-16%synergy
Commander's Sphere
30%inclusion8 decks27 decks
10%synergy
Talisman of Hierarchy
30%inclusion8 decks27 decks
-13%synergy
Fellwar Stone
22%inclusion6 decks27 decks
-12%synergy
Mind Stone
22%inclusion6 decks27 decks
9%synergy
Charcoal Diamond
7.4%inclusion2 decks27 decks
6%synergy
Sky Diamond
7.4%inclusion2 decks27 decks
6%synergy
Marble Diamond
7.4%inclusion2 decks27 decks
6%synergy
Lands
Swamp
100%inclusion27 decks27 decks
9%synergy
Island
100%inclusion27 decks27 decks
7%synergy
Plains
100%inclusion27 decks27 decks
9%synergy
Command Tower
96%inclusion26 decks27 decks
4%synergy
Arcane Sanctum
85%inclusion23 decks27 decks
31%synergy
Temple of Deceit
67%inclusion18 decks27 decks
48%synergy
Temple of Enlightenment
63%inclusion17 decks27 decks
46%synergy
Adarkar Wastes
63%inclusion17 decks27 decks
33%synergy
Temple of Silence
63%inclusion17 decks27 decks
43%synergy
Exotic Orchard
59%inclusion16 decks27 decks
1%synergy
Caves of Koilos
59%inclusion16 decks27 decks
24%synergy
Evolving Wilds
56%inclusion15 decks27 decks
30%synergy
Terramorphic Expanse
52%inclusion14 decks27 decks
35%synergy
Underground River
52%inclusion14 decks27 decks
20%synergy
Azorius Chancery
44%inclusion12 decks27 decks
30%synergy
Prairie Stream
44%inclusion12 decks27 decks
4%synergy
Sunken Hollow
44%inclusion12 decks27 decks
5%synergy
Dimir Aqueduct
41%inclusion11 decks27 decks
27%synergy
Isolated Chapel
41%inclusion11 decks27 decks
3%synergy
Glacial Fortress
37%inclusion10 decks27 decks
-2%synergy
Contaminated Landscape
37%inclusion10 decks27 decks
22%synergy
Ash Barrens
37%inclusion10 decks27 decks
26%synergy
Valgavoth's Lair
37%inclusion10 decks27 decks
34%synergy
Orzhov Basilica
37%inclusion10 decks27 decks
21%synergy
Obscura Storefront
37%inclusion10 decks27 decks
26%synergy
Tainted Field
33%inclusion9 decks27 decks
26%synergy
Drowned Catacomb
30%inclusion8 decks27 decks
-5%synergy
Tainted Isle
26%inclusion7 decks27 decks
20%synergy
Darkwater Catacombs
26%inclusion7 decks27 decks
12%synergy
Thriving Isle
26%inclusion7 decks27 decks
21%synergy
Shineshadow Snarl
26%inclusion7 decks27 decks
16%synergy
Path of Ancestry
22%inclusion6 decks27 decks
-5%synergy
Thriving Heath
22%inclusion6 decks27 decks
18%synergy
Irrigated Farmland
19%inclusion5 decks27 decks
11%synergy
Port Town
19%inclusion5 decks27 decks
2%synergy
Skycloud Expanse
19%inclusion5 decks27 decks
4%synergy
Thriving Moor
19%inclusion5 decks27 decks
14%synergy
Myriad Landscape
15%inclusion4 decks27 decks
6%synergy
Desolate Mire
11%inclusion3 decks27 decks
5%synergy
Fetid Heath
11%inclusion3 decks27 decks
0%synergy
Choked Estuary
11%inclusion3 decks27 decks
-5%synergy
Waterlogged Teachings
11%inclusion3 decks27 decks
7%synergy
Floodfarm Verge
11%inclusion3 decks27 decks
0%synergy
Idyllic Beachfront
7.4%inclusion2 decks27 decks
4%synergy
Abandoned Campground
7.4%inclusion2 decks27 decks
7%synergy
Fetid Pools
7.4%inclusion2 decks27 decks
1%synergy
Glasswing Grace
7.4%inclusion2 decks27 decks
5%synergy
River of Tears
7.4%inclusion2 decks27 decks
5%synergy
Demolition Field
7.4%inclusion2 decks27 decks
4%synergy
Sunlit Marsh
7.4%inclusion2 decks27 decks
3%synergy
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