The Master of Keys (Commander) - Self-Mill

Background image for What if Thassa's Oracle Were Banned?
Harvey McGuinness
Sep 23, 2025
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.
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Noggle the Mind
25%inclusion1 decks4 decks
25%synergy
Aang's Iceberg
3.2%inclusion2 decks63 decks
3%synergy
The Rise of Sozin
3.2%inclusion2 decks63 decks
3%synergy
Chakra Meditation
2.4%inclusion1 decks42 decks
2%synergy
Northern Air Temple
2.3%inclusion1 decks44 decks
2%synergy
High Synergy Cards
Inquisitive Glimmer
79%inclusion101 decks128 decks
71%synergy
Ripples of Undeath
72%inclusion92 decks128 decks
69%synergy
Mesa Enchantress
73%inclusion94 decks128 decks
64%synergy
Gravebreaker Lamia
62%inclusion79 decks128 decks
61%synergy
Entity Tracker
65%inclusion83 decks128 decks
58%synergy
Starfield Mystic
64%inclusion82 decks128 decks
57%synergy
Hall of Heliod's Generosity
67%inclusion86 decks128 decks
54%synergy
Demon of Fate's Design
59%inclusion76 decks128 decks
54%synergy
Scrabbling Skullcrab
53%inclusion68 decks128 decks
52%synergy
Doomwake Giant
58%inclusion74 decks128 decks
52%synergy
Top Cards
Animate Dead
61%inclusion78 decks128 decks
51%synergy
Fear of Sleep Paralysis
55%inclusion70 decks128 decks
49%synergy
Overlord of the Floodpits
50%inclusion64 decks128 decks
46%synergy
Mystic Remora
48%inclusion61 decks128 decks
26%synergy
Dress Down
47%inclusion60 decks128 decks
44%synergy
Overlord of the Balemurk
46%inclusion59 decks128 decks
44%synergy
Starfield of Nyx
46%inclusion59 decks128 decks
42%synergy
Sphere of Safety
46%inclusion59 decks128 decks
37%synergy
Necromancy
44%inclusion56 decks128 decks
39%synergy
Fear of Impostors
43%inclusion55 decks128 decks
41%synergy
Game Changers
Smothering Tithe
41%inclusion52 decks128 decks
9%synergy
Rhystic Study
36%inclusion46 decks128 decks
4%synergy
Enlightened Tutor
18%inclusion23 decks128 decks
-2%synergy
Demonic Tutor
15%inclusion19 decks128 decks
-7%synergy
Necropotence
15%inclusion19 decks128 decks
8%synergy
Mystical Tutor
13%inclusion17 decks128 decks
2%synergy
Thassa's Oracle
13%inclusion17 decks128 decks
3%synergy
Fierce Guardianship
11%inclusion14 decks128 decks
-10%synergy
Vampiric Tutor
10%inclusion13 decks128 decks
-8%synergy
Cyclonic Rift
9.4%inclusion12 decks128 decks
-15%synergy
Creatures
Zur, Eternal Schemer
42%inclusion54 decks128 decks
39%synergy
Ondu Spiritdancer
42%inclusion54 decks128 decks
36%synergy
Victor, Valgavoth's Seneschal
39%inclusion50 decks128 decks
37%synergy
Zur the Enchanter
34%inclusion44 decks128 decks
29%synergy
Ghostly Dancers
32%inclusion41 decks128 decks
29%synergy
Silent Hallcreeper
27%inclusion35 decks128 decks
23%synergy
Enduring Curiosity
27%inclusion34 decks128 decks
19%synergy
Heliod, the Radiant Dawn
27%inclusion34 decks128 decks
23%synergy
Soaring Lightbringer
23%inclusion30 decks128 decks
18%synergy
Aminatou, Veil Piercer
23%inclusion30 decks128 decks
22%synergy
Grim Guardian
23%inclusion30 decks128 decks
21%synergy
Mindwrack Harpy
23%inclusion30 decks128 decks
23%synergy
Archon of Sun's Grace
22%inclusion28 decks128 decks
17%synergy
Sage of Mysteries
22%inclusion28 decks128 decks
22%synergy
Alseid of Life's Bounty
19%inclusion24 decks128 decks
17%synergy
Moon-Blessed Cleric
18%inclusion23 decks128 decks
13%synergy
Overlord of the Mistmoors
17%inclusion22 decks128 decks
15%synergy
Abdel Adrian, Gorion's Ward
17%inclusion22 decks128 decks
15%synergy
Skullsnap Nuisance
16%inclusion21 decks128 decks
16%synergy
Archetype of Imagination
16%inclusion20 decks128 decks
11%synergy
Hedron Crab
16%inclusion20 decks128 decks
15%synergy
Athreos, Shroud-Veiled
15%inclusion19 decks128 decks
10%synergy
Gremlin Tamer
14%inclusion18 decks128 decks
13%synergy
Ancient Cellarspawn
14%inclusion18 decks128 decks
11%synergy
Starnheim Courser
13%inclusion17 decks128 decks
9%synergy
Balemurk Leech
13%inclusion17 decks128 decks
13%synergy
Esper Sentinel
13%inclusion16 decks128 decks
-15%synergy
Summon: Bahamut
12%inclusion9 decks76 decks
10%synergy
Summon: Yojimbo
12%inclusion9 decks76 decks
11%synergy
Nashi, Searcher in the Dark
12%inclusion15 decks128 decks
11%synergy
Phenax, God of Deception
11%inclusion14 decks128 decks
11%synergy
Grand Abolisher
11%inclusion14 decks128 decks
-4%synergy
Emet-Selch of the Third Seat
11%inclusion8 decks76 decks
1%synergy
Lotho, Corrupt Shirriff
10%inclusion13 decks128 decks
-7%synergy
Spirited Companion
10%inclusion13 decks128 decks
8%synergy
Laboratory Maniac
10%inclusion13 decks128 decks
7%synergy
Stenn, Paranoid Partisan
9.4%inclusion12 decks128 decks
8%synergy
Witch Enchanter
9.4%inclusion12 decks128 decks
2%synergy
Fear of Surveillance
9.4%inclusion12 decks128 decks
9%synergy
Hullbreaker Horror
9.4%inclusion12 decks128 decks
3%synergy
Fear of Infinity
8.6%inclusion11 decks128 decks
8%synergy
Valley Floodcaller
8.6%inclusion11 decks128 decks
4%synergy
Stitcher's Supplier
8.6%inclusion11 decks128 decks
8%synergy
Displacer Kitten
7.8%inclusion10 decks128 decks
1%synergy
Neerdiv, Devious Diver
7.3%inclusion8 decks110 decks
7%synergy
Valgavoth, Terror Eater
7.0%inclusion9 decks128 decks
4%synergy
Callaphe, Beloved of the Sea
7.0%inclusion9 decks128 decks
6%synergy
Auramancer
7.0%inclusion9 decks128 decks
4%synergy
Ledger Shredder
7.0%inclusion9 decks128 decks
-2%synergy
Millikin
7.0%inclusion9 decks128 decks
6%synergy
Instants
Swords to Plowshares
43%inclusion55 decks128 decks
-25%synergy
Counterspell
31%inclusion40 decks128 decks
-10%synergy
Entomb
30%inclusion38 decks128 decks
23%synergy
Path to Exile
25%inclusion32 decks128 decks
-17%synergy
Arcane Denial
23%inclusion29 decks128 decks
2%synergy
Dark Ritual
22%inclusion28 decks128 decks
2%synergy
Void Rend
21%inclusion27 decks128 decks
-13%synergy
An Offer You Can't Refuse
20%inclusion25 decks128 decks
-7%synergy
Otherworldly Gaze
14%inclusion18 decks128 decks
12%synergy
Thirst for Meaning
13%inclusion17 decks128 decks
12%synergy
Inkshield
13%inclusion17 decks128 decks
4%synergy
Dovin's Veto
13%inclusion16 decks128 decks
-13%synergy
Frantic Search
12%inclusion15 decks128 decks
-6%synergy
Negate
12%inclusion15 decks128 decks
-5%synergy
Silence
11%inclusion14 decks128 decks
1%synergy
Cabal Ritual
9.4%inclusion12 decks128 decks
6%synergy
Faithful Mending
9.4%inclusion12 decks128 decks
6%synergy
Swan Song
8.6%inclusion11 decks128 decks
-11%synergy
Demonic Consultation
7.8%inclusion10 decks128 decks
-1%synergy
Anguished Unmaking
7.8%inclusion10 decks128 decks
-17%synergy
Fell the Profane
7.0%inclusion9 decks128 decks
-2%synergy
Mindbreak Trap
7.0%inclusion9 decks128 decks
0%synergy
Mana Drain
6.3%inclusion8 decks128 decks
-11%synergy
Sink into Stupor
6.3%inclusion8 decks128 decks
-6%synergy
Tainted Pact
5.5%inclusion7 decks128 decks
-2%synergy
Fact or Fiction
5.5%inclusion7 decks128 decks
2%synergy
Thought Scour
5.5%inclusion7 decks128 decks
4%synergy
Flusterstorm
5.5%inclusion7 decks128 decks
-3%synergy
Force of Will
5.5%inclusion7 decks128 decks
-7%synergy
Get Out
5.5%inclusion7 decks128 decks
5%synergy
Utter End
5.5%inclusion7 decks128 decks
-1%synergy
Teferi's Protection
5.5%inclusion7 decks128 decks
-11%synergy
Brainstorm
5.5%inclusion7 decks128 decks
-12%synergy
Borne Upon a Wind
5.5%inclusion7 decks128 decks
1%synergy
Withering Torment
5.5%inclusion7 decks128 decks
4%synergy
Sorceries
Sevinne's Reclamation
42%inclusion54 decks128 decks
33%synergy
Redress Fate
32%inclusion41 decks128 decks
26%synergy
Windfall
23%inclusion29 decks128 decks
9%synergy
Dance of the Manse
20%inclusion26 decks128 decks
17%synergy
Reanimate
20%inclusion25 decks128 decks
4%synergy
Toxic Deluge
19%inclusion24 decks128 decks
-1%synergy
Extinguish All Hope
19%inclusion24 decks128 decks
17%synergy
Singularity Rupture
18%inclusion12 decks68 decks
15%synergy
Resurgent Belief
17%inclusion22 decks128 decks
15%synergy
Space-Time Anomaly
14%inclusion9 decks65 decks
12%synergy
Time Wipe
13%inclusion17 decks128 decks
6%synergy
Idyllic Tutor
13%inclusion16 decks128 decks
8%synergy
Glimpse the Unthinkable
11%inclusion14 decks128 decks
10%synergy
Brilliant Restoration
10%inclusion13 decks128 decks
8%synergy
Demonic Counsel
9.4%inclusion12 decks128 decks
8%synergy
Replenish
9.4%inclusion12 decks128 decks
8%synergy
Austere Command
8.6%inclusion11 decks128 decks
0%synergy
Traumatize
8.6%inclusion11 decks128 decks
8%synergy
Supreme Verdict
7.8%inclusion10 decks128 decks
-7%synergy
Damn
7.8%inclusion10 decks128 decks
-13%synergy
Buried Alive
6.3%inclusion8 decks128 decks
2%synergy
Ponder
5.5%inclusion7 decks128 decks
-4%synergy
Feed the Swarm
5.5%inclusion7 decks128 decks
3%synergy
Utility Artifacts
Mesmeric Orb
21%inclusion27 decks128 decks
20%synergy
Lightning Greaves
10%inclusion13 decks128 decks
-12%synergy
Cloud Key
9.4%inclusion12 decks128 decks
6%synergy
The One Ring
8.6%inclusion11 decks128 decks
-5%synergy
Wayfarer's Bauble
7.8%inclusion10 decks128 decks
0%synergy
Keys to the House
7.8%inclusion10 decks128 decks
8%synergy
Perpetual Timepiece
7.0%inclusion9 decks128 decks
7%synergy
Wishclaw Talisman
7.0%inclusion9 decks128 decks
-1%synergy
Swiftfoot Boots
6.3%inclusion8 decks128 decks
-18%synergy
Crucible of Worlds
5.5%inclusion7 decks128 decks
5%synergy
Enchantments
Secret Arcade // Dusty Parlor
42%inclusion54 decks128 decks
37%synergy
Propaganda
41%inclusion53 decks128 decks
15%synergy
Seal of Cleansing
41%inclusion52 decks128 decks
39%synergy
Cemetery Tampering
41%inclusion52 decks128 decks
40%synergy
Sigil of the Empty Throne
39%inclusion50 decks128 decks
33%synergy
Ghostly Prison
39%inclusion50 decks128 decks
17%synergy
Mirrormade
37%inclusion47 decks128 decks
27%synergy
Grasp of Fate
36%inclusion46 decks128 decks
30%synergy
Stillness in Motion
32%inclusion27 decks85 decks
31%synergy
Blind Obedience
29%inclusion37 decks128 decks
17%synergy
Amphibian Downpour
29%inclusion37 decks128 decks
24%synergy
Court of Cunning
28%inclusion36 decks128 decks
27%synergy
Estrid's Invocation
27%inclusion35 decks128 decks
23%synergy
Darksteel Mutation
27%inclusion34 decks128 decks
20%synergy
Cacophony Unleashed
26%inclusion33 decks128 decks
24%synergy
Defiled Crypt // Cadaver Lab
26%inclusion33 decks128 decks
25%synergy
The Tale of Tamiyo
25%inclusion32 decks128 decks
25%synergy
Polluted Cistern // Dim Oubliette
25%inclusion32 decks128 decks
24%synergy
Dance of the Dead
24%inclusion31 decks128 decks
22%synergy
Phyrexian Arena
23%inclusion30 decks128 decks
9%synergy
All That Glitters
21%inclusion27 decks128 decks
12%synergy
Monologue Tax
21%inclusion27 decks128 decks
15%synergy
Extravagant Replication
20%inclusion26 decks128 decks
15%synergy
Restricted Office // Lecture Hall
20%inclusion25 decks128 decks
17%synergy
Ethereal Armor
20%inclusion25 decks128 decks
15%synergy
Out of the Tombs
20%inclusion25 decks128 decks
19%synergy
Bottomless Pool // Locker Room
20%inclusion25 decks128 decks
18%synergy
Central Elevator // Promising Stairs
19%inclusion24 decks128 decks
18%synergy
Shark Typhoon
19%inclusion24 decks128 decks
13%synergy
Copy Enchantment
18%inclusion23 decks128 decks
13%synergy
Greater Auramancy
18%inclusion23 decks128 decks
14%synergy
Sheltered by Ghosts
18%inclusion23 decks128 decks
15%synergy
Black Market Connections
18%inclusion23 decks128 decks
4%synergy
Mirror Room // Fractured Realm
18%inclusion23 decks128 decks
16%synergy
Seal of Removal
18%inclusion23 decks128 decks
17%synergy
Hallowed Haunting
17%inclusion22 decks128 decks
15%synergy
Teval's Judgment
17%inclusion15 decks89 decks
16%synergy
Timely Ward
16%inclusion21 decks128 decks
11%synergy
Underwater Tunnel // Slimy Aquarium
16%inclusion20 decks128 decks
15%synergy
The Meathook Massacre
16%inclusion20 decks128 decks
12%synergy
Imprisoned in the Moon
15%inclusion19 decks128 decks
8%synergy
Meat Locker // Drowned Diner
14%inclusion18 decks125 decks
14%synergy
Touch the Spirit Realm
14%inclusion18 decks128 decks
12%synergy
Cramped Vents // Access Maze
14%inclusion18 decks128 decks
11%synergy
Dazzling Theater // Prop Room
13%inclusion17 decks128 decks
12%synergy
Derelict Attic // Widow's Walk
13%inclusion16 decks125 decks
12%synergy
Funeral Room // Awakening Hall
13%inclusion16 decks128 decks
12%synergy
Virtue of Persistence
13%inclusion16 decks128 decks
11%synergy
Secrets of the Dead
13%inclusion16 decks128 decks
12%synergy
The Eldest Reborn
12%inclusion15 decks128 decks
9%synergy
Battles
Invasion of Theros
10%inclusion13 decks128 decks
8%synergy
Planeswalkers
Ashiok, Dream Render
7.0%inclusion9 decks128 decks
5%synergy
Teferi, Time Raveler
6.3%inclusion8 decks128 decks
-2%synergy
Utility Lands
Bojuka Bog
34%inclusion44 decks128 decks
7%synergy
Otawara, Soaring City
18%inclusion23 decks128 decks
-1%synergy
Takenuma, Abandoned Mire
15%inclusion19 decks128 decks
8%synergy
Reliquary Tower
15%inclusion19 decks128 decks
-19%synergy
Cephalid Coliseum
15%inclusion19 decks128 decks
11%synergy
Nephalia Drownyard
12%inclusion15 decks128 decks
11%synergy
Halimar Depths
10%inclusion13 decks128 decks
5%synergy
Urza's Saga
7.8%inclusion10 decks128 decks
-4%synergy
Temple of the False God
7.8%inclusion10 decks128 decks
0%synergy
Ancient Tomb
7.8%inclusion10 decks128 decks
-5%synergy
Serra's Sanctum
7.8%inclusion10 decks128 decks
6%synergy
Urborg, Tomb of Yawgmoth
7.8%inclusion10 decks128 decks
-5%synergy
Ishgard, the Holy See
6.6%inclusion5 decks76 decks
3%synergy
Mana Artifacts
Sol Ring
90%inclusion115 decks128 decks
0%synergy
Arcane Signet
87%inclusion111 decks128 decks
-1%synergy
Talisman of Dominance
48%inclusion62 decks128 decks
-1%synergy
Talisman of Progress
41%inclusion52 decks128 decks
-3%synergy
Talisman of Hierarchy
38%inclusion48 decks128 decks
-6%synergy
Orzhov Signet
32%inclusion41 decks128 decks
-2%synergy
Azorius Signet
32%inclusion41 decks128 decks
0%synergy
Dimir Signet
26%inclusion33 decks128 decks
-7%synergy
Fellwar Stone
24%inclusion31 decks128 decks
-10%synergy
Mind Stone
15%inclusion19 decks128 decks
2%synergy
Commander's Sphere
8.6%inclusion11 decks128 decks
-10%synergy
Mana Vault
7.0%inclusion9 decks128 decks
-2%synergy
Lotus Petal
6.3%inclusion8 decks128 decks
-5%synergy
Chromatic Lantern
5.5%inclusion7 decks128 decks
-8%synergy
Lands
Island
96%inclusion123 decks128 decks
3%synergy
Command Tower
94%inclusion120 decks128 decks
1%synergy
Plains
94%inclusion120 decks128 decks
2%synergy
Swamp
93%inclusion119 decks128 decks
2%synergy
Arcane Sanctum
62%inclusion79 decks128 decks
7%synergy
Caves of Koilos
58%inclusion74 decks128 decks
22%synergy
Underground River
51%inclusion65 decks128 decks
18%synergy
Adarkar Wastes
51%inclusion65 decks128 decks
20%synergy
Exotic Orchard
48%inclusion62 decks128 decks
-10%synergy
Glacial Fortress
41%inclusion53 decks128 decks
1%synergy
Valgavoth's Lair
39%inclusion50 decks128 decks
36%synergy
Hallowed Fountain
38%inclusion49 decks128 decks
-11%synergy
Watery Grave
38%inclusion49 decks128 decks
-12%synergy
Godless Shrine
37%inclusion47 decks128 decks
-14%synergy
Polluted Delta
34%inclusion44 decks128 decks
-3%synergy
Isolated Chapel
34%inclusion43 decks128 decks
-5%synergy
Drowned Catacomb
34%inclusion43 decks128 decks
-2%synergy
Flooded Strand
34%inclusion43 decks128 decks
-4%synergy
Raffine's Tower
33%inclusion42 decks128 decks
-8%synergy
Marsh Flats
31%inclusion40 decks128 decks
-5%synergy
Undercity Sewers
29%inclusion37 decks128 decks
15%synergy
Prairie Stream
28%inclusion36 decks128 decks
-13%synergy
Sea of Clouds
27%inclusion34 decks128 decks
-9%synergy
Terramorphic Expanse
26%inclusion33 decks128 decks
9%synergy
Meticulous Archive
26%inclusion33 decks128 decks
12%synergy
Shadowy Backstreet
25%inclusion32 decks128 decks
13%synergy
Sunken Hollow
25%inclusion32 decks128 decks
-15%synergy
Deserted Beach
25%inclusion32 decks128 decks
4%synergy
Contaminated Landscape
24%inclusion31 decks128 decks
10%synergy
Azorius Chancery
23%inclusion30 decks128 decks
9%synergy
Shipwreck Marsh
23%inclusion30 decks128 decks
3%synergy
Temple of Enlightenment
23%inclusion30 decks128 decks
7%synergy
Temple of Deceit
23%inclusion29 decks128 decks
5%synergy
Dimir Aqueduct
23%inclusion29 decks128 decks
9%synergy
Evolving Wilds
23%inclusion29 decks128 decks
-2%synergy
Orzhov Basilica
23%inclusion29 decks128 decks
7%synergy
Vault of Champions
23%inclusion29 decks128 decks
-10%synergy
Morphic Pool
22%inclusion28 decks128 decks
-13%synergy
Temple of Silence
21%inclusion27 decks128 decks
2%synergy
Obscura Storefront
19%inclusion24 decks128 decks
8%synergy
Gloomlake Verge
17%inclusion22 decks128 decks
6%synergy
Floodfarm Verge
16%inclusion21 decks128 decks
5%synergy
Shattered Sanctum
16%inclusion21 decks128 decks
0%synergy
Fabled Passage
16%inclusion20 decks128 decks
8%synergy
Tainted Field
15%inclusion19 decks128 decks
8%synergy
Darkwater Catacombs
14%inclusion18 decks128 decks
0%synergy
City of Brass
14%inclusion18 decks128 decks
-1%synergy
Tainted Isle
14%inclusion18 decks128 decks
8%synergy
Port Town
13%inclusion16 decks128 decks
-4%synergy
Ash Barrens
13%inclusion16 decks128 decks
2%synergy