The Master of Keys (Commander) - Graveyard

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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The Rise of Sozin
7.5%inclusion3 decks40 decks
7%synergy
Northern Air Temple
3.7%inclusion1 decks27 decks
4%synergy
The Legend of Yangchen
3.7%inclusion1 decks27 decks
3%synergy
The Spirit Oasis
3.7%inclusion1 decks27 decks
4%synergy
Aang's Iceberg
2.5%inclusion1 decks40 decks
2%synergy
High Synergy Cards
Ripples of Undeath
74%inclusion45 decks61 decks
71%synergy
Inquisitive Glimmer
77%inclusion47 decks61 decks
69%synergy
Entity Tracker
66%inclusion40 decks61 decks
59%synergy
Hall of Heliod's Generosity
72%inclusion44 decks61 decks
59%synergy
Starfield Mystic
66%inclusion40 decks61 decks
59%synergy
Animate Dead
67%inclusion41 decks61 decks
57%synergy
Mesa Enchantress
66%inclusion40 decks61 decks
56%synergy
Demon of Fate's Design
61%inclusion37 decks61 decks
55%synergy
Fear of Sleep Paralysis
61%inclusion37 decks61 decks
55%synergy
Gravebreaker Lamia
56%inclusion34 decks61 decks
55%synergy
Top Cards
Doomwake Giant
59%inclusion36 decks61 decks
53%synergy
Mystic Remora
56%inclusion34 decks61 decks
34%synergy
Necromancy
54%inclusion33 decks61 decks
49%synergy
Sevinne's Reclamation
51%inclusion31 decks61 decks
42%synergy
Overlord of the Balemurk
49%inclusion30 decks61 decks
47%synergy
Sphere of Safety
49%inclusion30 decks61 decks
40%synergy
Scrabbling Skullcrab
48%inclusion29 decks61 decks
47%synergy
Overlord of the Floodpits
48%inclusion29 decks61 decks
44%synergy
Swords to Plowshares
48%inclusion29 decks61 decks
-21%synergy
Mirrormade
44%inclusion27 decks61 decks
34%synergy
Game Changers
Smothering Tithe
48%inclusion29 decks61 decks
15%synergy
Rhystic Study
46%inclusion28 decks61 decks
14%synergy
Enlightened Tutor
21%inclusion13 decks61 decks
1%synergy
Demonic Tutor
18%inclusion11 decks61 decks
-3%synergy
Cyclonic Rift
18%inclusion11 decks61 decks
-6%synergy
Mystical Tutor
16%inclusion10 decks61 decks
5%synergy
Thassa's Oracle
13%inclusion8 decks61 decks
3%synergy
Mana Vault
13%inclusion8 decks61 decks
4%synergy
Necropotence
13%inclusion8 decks61 decks
6%synergy
Vampiric Tutor
13%inclusion8 decks61 decks
-5%synergy
Creatures
Victor, Valgavoth's Seneschal
44%inclusion27 decks61 decks
42%synergy
Zur, Eternal Schemer
43%inclusion26 decks61 decks
39%synergy
Fear of Impostors
41%inclusion25 decks61 decks
39%synergy
Ondu Spiritdancer
41%inclusion25 decks61 decks
35%synergy
Zur the Enchanter
34%inclusion21 decks61 decks
29%synergy
Heliod, the Radiant Dawn
33%inclusion20 decks61 decks
29%synergy
Silent Hallcreeper
30%inclusion18 decks61 decks
25%synergy
Enduring Curiosity
28%inclusion17 decks61 decks
20%synergy
Ghostly Dancers
26%inclusion16 decks61 decks
24%synergy
Abdel Adrian, Gorion's Ward
25%inclusion15 decks61 decks
23%synergy
Sage of Mysteries
21%inclusion13 decks61 decks
21%synergy
Soaring Lightbringer
21%inclusion13 decks61 decks
16%synergy
Moon-Blessed Cleric
20%inclusion12 decks61 decks
15%synergy
Grim Guardian
20%inclusion12 decks61 decks
17%synergy
Mindwrack Harpy
20%inclusion12 decks61 decks
19%synergy
Hedron Crab
18%inclusion11 decks61 decks
17%synergy
Athreos, Shroud-Veiled
18%inclusion11 decks61 decks
14%synergy
Archetype of Imagination
18%inclusion11 decks61 decks
13%synergy
Aminatou, Veil Piercer
18%inclusion11 decks61 decks
17%synergy
Overlord of the Mistmoors
16%inclusion10 decks61 decks
14%synergy
Ancient Cellarspawn
16%inclusion10 decks61 decks
13%synergy
Archon of Sun's Grace
15%inclusion9 decks61 decks
10%synergy
Nashi, Searcher in the Dark
15%inclusion9 decks61 decks
14%synergy
Starnheim Courser
13%inclusion8 decks61 decks
9%synergy
Phenax, God of Deception
13%inclusion8 decks61 decks
13%synergy
Lotho, Corrupt Shirriff
13%inclusion8 decks61 decks
-4%synergy
Esper Sentinel
13%inclusion8 decks61 decks
-15%synergy
Grand Abolisher
13%inclusion8 decks61 decks
-1%synergy
Emet-Selch of the Third Seat
13%inclusion6 decks46 decks
3%synergy
Summon: Yojimbo
13%inclusion6 decks46 decks
12%synergy
Skullsnap Nuisance
11%inclusion7 decks61 decks
11%synergy
Alseid of Life's Bounty
11%inclusion7 decks61 decks
10%synergy
Ledger Shredder
11%inclusion7 decks61 decks
3%synergy
Summon: Bahamut
11%inclusion5 decks47 decks
9%synergy
Lurrus of the Dream-Den
10%inclusion6 decks61 decks
8%synergy
Spirited Companion
10%inclusion6 decks61 decks
8%synergy
Balemurk Leech
10%inclusion6 decks61 decks
9%synergy
Hullbreaker Horror
10%inclusion6 decks61 decks
4%synergy
Witch Enchanter
8.2%inclusion5 decks61 decks
1%synergy
Stenn, Paranoid Partisan
8.2%inclusion5 decks61 decks
7%synergy
Valley Floodcaller
8.2%inclusion5 decks61 decks
4%synergy
Braids, Arisen Nightmare
8.2%inclusion5 decks61 decks
7%synergy
Callaphe, Beloved of the Sea
8.2%inclusion5 decks61 decks
7%synergy
Displacer Kitten
6.6%inclusion4 decks61 decks
-1%synergy
Perplexing Chimera
6.6%inclusion4 decks61 decks
6%synergy
Stitcher's Supplier
6.6%inclusion4 decks61 decks
6%synergy
Enduring Innocence
6.6%inclusion4 decks61 decks
5%synergy
Gremlin Tamer
6.6%inclusion4 decks61 decks
5%synergy
Tameshi, Reality Architect
6.6%inclusion4 decks61 decks
6%synergy
Mockingbird
6.6%inclusion4 decks61 decks
2%synergy
Instants
Entomb
33%inclusion20 decks61 decks
26%synergy
Void Rend
33%inclusion20 decks61 decks
-1%synergy
Arcane Denial
30%inclusion18 decks61 decks
9%synergy
Dark Ritual
28%inclusion17 decks61 decks
9%synergy
An Offer You Can't Refuse
23%inclusion14 decks61 decks
-4%synergy
Counterspell
23%inclusion14 decks61 decks
-18%synergy
Thirst for Meaning
20%inclusion12 decks61 decks
18%synergy
Path to Exile
20%inclusion12 decks61 decks
-22%synergy
Silence
16%inclusion10 decks61 decks
6%synergy
Frantic Search
15%inclusion9 decks61 decks
-2%synergy
Sink into Stupor
15%inclusion9 decks61 decks
2%synergy
Inkshield
15%inclusion9 decks61 decks
6%synergy
Fell the Profane
13%inclusion8 decks61 decks
4%synergy
Dovin's Veto
13%inclusion8 decks61 decks
-12%synergy
Otherworldly Gaze
13%inclusion8 decks61 decks
11%synergy
Cabal Ritual
11%inclusion7 decks61 decks
8%synergy
Teferi's Protection
10%inclusion6 decks61 decks
-7%synergy
Gifts Ungiven
10%inclusion6 decks61 decks
8%synergy
Mana Drain
10%inclusion6 decks61 decks
-8%synergy
Swan Song
10%inclusion6 decks61 decks
-10%synergy
Demonic Consultation
10%inclusion6 decks61 decks
1%synergy
Anguished Unmaking
10%inclusion6 decks61 decks
-15%synergy
Fierce Guardianship
10%inclusion6 decks61 decks
-11%synergy
Tainted Pact
8.2%inclusion5 decks61 decks
1%synergy
Negate
8.2%inclusion5 decks61 decks
-8%synergy
Intuition
8.2%inclusion5 decks61 decks
6%synergy
Mindbreak Trap
8.2%inclusion5 decks61 decks
1%synergy
Faithful Mending
8.2%inclusion5 decks61 decks
4%synergy
Brainstorm
6.6%inclusion4 decks61 decks
-11%synergy
Fact or Fiction
6.6%inclusion4 decks61 decks
3%synergy
Thought Scour
6.6%inclusion4 decks61 decks
6%synergy
Flusterstorm
6.6%inclusion4 decks61 decks
-2%synergy
Into the Flood Maw
6.6%inclusion4 decks61 decks
3%synergy
Sorceries
Windfall
33%inclusion20 decks61 decks
19%synergy
Redress Fate
31%inclusion19 decks61 decks
25%synergy
Toxic Deluge
28%inclusion17 decks61 decks
8%synergy
Reanimate
23%inclusion14 decks61 decks
7%synergy
Dance of the Manse
23%inclusion14 decks61 decks
19%synergy
Time Wipe
18%inclusion11 decks61 decks
11%synergy
Resurgent Belief
16%inclusion10 decks61 decks
14%synergy
Extinguish All Hope
16%inclusion10 decks61 decks
15%synergy
Singularity Rupture
12%inclusion5 decks42 decks
10%synergy
Ponder
11%inclusion7 decks61 decks
2%synergy
Supreme Verdict
11%inclusion7 decks61 decks
-3%synergy
Glimpse the Unthinkable
11%inclusion7 decks61 decks
11%synergy
Austere Command
10%inclusion6 decks61 decks
1%synergy
Damn
10%inclusion6 decks61 decks
-11%synergy
Space-Time Anomaly
10%inclusion4 decks41 decks
8%synergy
Open the Vaults
8.2%inclusion5 decks61 decks
7%synergy
Idyllic Tutor
8.2%inclusion5 decks61 decks
4%synergy
Demonic Counsel
8.2%inclusion5 decks61 decks
7%synergy
Imperial Seal
6.6%inclusion4 decks61 decks
-1%synergy
Replenish
6.6%inclusion4 decks61 decks
5%synergy
Traumatize
6.6%inclusion4 decks61 decks
6%synergy
Breach the Multiverse
6.6%inclusion4 decks61 decks
4%synergy
Utility Artifacts
Mesmeric Orb
21%inclusion13 decks61 decks
20%synergy
Crucible of Worlds
11%inclusion7 decks61 decks
11%synergy
Cloud Key
8.2%inclusion5 decks61 decks
5%synergy
The One Ring
8.2%inclusion5 decks61 decks
-5%synergy
Lightning Greaves
8.2%inclusion5 decks61 decks
-14%synergy
Swiftfoot Boots
6.6%inclusion4 decks61 decks
-17%synergy
Enchantments
Dress Down
44%inclusion27 decks61 decks
42%synergy
Seal of Cleansing
43%inclusion26 decks61 decks
41%synergy
Secret Arcade // Dusty Parlor
43%inclusion26 decks61 decks
38%synergy
Estrid's Invocation
39%inclusion24 decks61 decks
35%synergy
Cacophony Unleashed
38%inclusion23 decks61 decks
36%synergy
Cemetery Tampering
38%inclusion23 decks61 decks
37%synergy
Amphibian Downpour
38%inclusion23 decks61 decks
33%synergy
Grasp of Fate
36%inclusion22 decks61 decks
30%synergy
Starfield of Nyx
36%inclusion22 decks61 decks
32%synergy
Propaganda
36%inclusion22 decks61 decks
10%synergy
Dance of the Dead
34%inclusion21 decks61 decks
32%synergy
Sigil of the Empty Throne
30%inclusion18 decks61 decks
24%synergy
Blind Obedience
30%inclusion18 decks61 decks
17%synergy
Ghostly Prison
30%inclusion18 decks61 decks
8%synergy
Stillness in Motion
28%inclusion14 decks50 decks
28%synergy
Polluted Cistern // Dim Oubliette
28%inclusion17 decks61 decks
27%synergy
Darksteel Mutation
26%inclusion16 decks61 decks
20%synergy
Monologue Tax
26%inclusion16 decks61 decks
20%synergy
Restricted Office // Lecture Hall
25%inclusion15 decks61 decks
22%synergy
Black Market Connections
23%inclusion14 decks61 decks
9%synergy
Phyrexian Arena
23%inclusion14 decks61 decks
9%synergy
Seal of Removal
23%inclusion14 decks61 decks
22%synergy
Court of Cunning
21%inclusion13 decks61 decks
20%synergy
The Tale of Tamiyo
21%inclusion13 decks61 decks
21%synergy
Nowhere to Run
21%inclusion13 decks61 decks
20%synergy
Teval's Judgment
20%inclusion10 decks50 decks
19%synergy
The Meathook Massacre
20%inclusion12 decks61 decks
16%synergy
Shark Typhoon
20%inclusion12 decks61 decks
14%synergy
All That Glitters
20%inclusion12 decks61 decks
11%synergy
Ethereal Armor
20%inclusion12 decks61 decks
15%synergy
Defiled Crypt // Cadaver Lab
20%inclusion12 decks61 decks
19%synergy
Touch the Spirit Realm
18%inclusion11 decks61 decks
16%synergy
Central Elevator // Promising Stairs
18%inclusion11 decks61 decks
17%synergy
Greater Auramancy
18%inclusion11 decks61 decks
14%synergy
Imprisoned in the Moon
16%inclusion10 decks61 decks
10%synergy
The Eldest Reborn
16%inclusion10 decks61 decks
14%synergy
Copy Enchantment
16%inclusion10 decks61 decks
12%synergy
Out of the Tombs
15%inclusion9 decks61 decks
14%synergy
Timely Ward
15%inclusion9 decks61 decks
10%synergy
Leyline of Anticipation
15%inclusion9 decks61 decks
10%synergy
Dazzling Theater // Prop Room
15%inclusion9 decks61 decks
13%synergy
Sheltered by Ghosts
15%inclusion9 decks61 decks
12%synergy
Land Tax
15%inclusion9 decks61 decks
9%synergy
Mirror Room // Fractured Realm
15%inclusion9 decks61 decks
12%synergy
Trouble in Pairs
15%inclusion9 decks61 decks
9%synergy
Search for Azcanta
15%inclusion9 decks61 decks
14%synergy
Extravagant Replication
13%inclusion8 decks61 decks
8%synergy
Authority of the Consuls
13%inclusion8 decks61 decks
2%synergy
Secrets of the Dead
13%inclusion8 decks61 decks
13%synergy
Bottomless Pool // Locker Room
13%inclusion8 decks61 decks
11%synergy
Battles
Invasion of Theros
10%inclusion6 decks61 decks
8%synergy
Utility Lands
Bojuka Bog
51%inclusion31 decks61 decks
23%synergy
Otawara, Soaring City
21%inclusion13 decks61 decks
2%synergy
Cephalid Coliseum
20%inclusion12 decks61 decks
16%synergy
Halimar Depths
16%inclusion10 decks61 decks
12%synergy
Takenuma, Abandoned Mire
13%inclusion8 decks61 decks
7%synergy
Reliquary Tower
13%inclusion8 decks61 decks
-21%synergy
Temple of the False God
11%inclusion7 decks61 decks
4%synergy
Ishgard, the Holy See
8.7%inclusion4 decks46 decks
5%synergy
Ancient Tomb
6.6%inclusion4 decks61 decks
-7%synergy
Serra's Sanctum
6.6%inclusion4 decks61 decks
5%synergy
Urza's Saga
6.6%inclusion4 decks61 decks
-5%synergy
Nephalia Drownyard
6.6%inclusion4 decks61 decks
6%synergy
Urborg, Tomb of Yawgmoth
6.6%inclusion4 decks61 decks
-7%synergy
Mana Artifacts
Sol Ring
87%inclusion53 decks61 decks
-3%synergy
Arcane Signet
82%inclusion50 decks61 decks
-6%synergy
Talisman of Dominance
41%inclusion25 decks61 decks
-8%synergy
Talisman of Hierarchy
38%inclusion23 decks61 decks
-6%synergy
Talisman of Progress
36%inclusion22 decks61 decks
-7%synergy
Orzhov Signet
33%inclusion20 decks61 decks
-2%synergy
Azorius Signet
33%inclusion20 decks61 decks
0%synergy
Fellwar Stone
28%inclusion17 decks61 decks
-6%synergy
Dimir Signet
18%inclusion11 decks61 decks
-14%synergy
Mind Stone
18%inclusion11 decks61 decks
5%synergy
Commander's Sphere
10%inclusion6 decks61 decks
-9%synergy
Chromatic Lantern
8.2%inclusion5 decks61 decks
-5%synergy
Thought Vessel
8.2%inclusion5 decks61 decks
-16%synergy
Lotus Petal
6.6%inclusion4 decks61 decks
-4%synergy
Lands
Island
97%inclusion59 decks61 decks
4%synergy
Plains
97%inclusion59 decks61 decks
5%synergy
Command Tower
93%inclusion57 decks61 decks
1%synergy
Swamp
93%inclusion57 decks61 decks
2%synergy
Arcane Sanctum
66%inclusion40 decks61 decks
11%synergy
Underground River
57%inclusion35 decks61 decks
25%synergy
Caves of Koilos
54%inclusion33 decks61 decks
19%synergy
Adarkar Wastes
51%inclusion31 decks61 decks
20%synergy
Exotic Orchard
49%inclusion30 decks61 decks
-9%synergy
Glacial Fortress
46%inclusion28 decks61 decks
6%synergy
Watery Grave
43%inclusion26 decks61 decks
-7%synergy
Valgavoth's Lair
41%inclusion25 decks61 decks
38%synergy
Isolated Chapel
41%inclusion25 decks61 decks
2%synergy
Raffine's Tower
39%inclusion24 decks61 decks
-2%synergy
Godless Shrine
38%inclusion23 decks61 decks
-12%synergy
Polluted Delta
38%inclusion23 decks61 decks
0%synergy
Hallowed Fountain
38%inclusion23 decks61 decks
-11%synergy
Flooded Strand
36%inclusion22 decks61 decks
-2%synergy
Drowned Catacomb
34%inclusion21 decks61 decks
-1%synergy
Marsh Flats
34%inclusion21 decks61 decks
-2%synergy
Shadowy Backstreet
33%inclusion20 decks61 decks
20%synergy
Undercity Sewers
31%inclusion19 decks61 decks
17%synergy
Azorius Chancery
31%inclusion19 decks61 decks
17%synergy
Meticulous Archive
31%inclusion19 decks61 decks
18%synergy
Prairie Stream
30%inclusion18 decks61 decks
-11%synergy
Obscura Storefront
30%inclusion18 decks61 decks
19%synergy
Orzhov Basilica
28%inclusion17 decks61 decks
12%synergy
Contaminated Landscape
26%inclusion16 decks61 decks
12%synergy
Sea of Clouds
26%inclusion16 decks61 decks
-9%synergy
Sunken Hollow
26%inclusion16 decks61 decks
-13%synergy
Evolving Wilds
25%inclusion15 decks61 decks
-1%synergy
Deserted Beach
25%inclusion15 decks61 decks
4%synergy
Dimir Aqueduct
23%inclusion14 decks61 decks
9%synergy
Shipwreck Marsh
23%inclusion14 decks61 decks
2%synergy
Temple of Enlightenment
23%inclusion14 decks61 decks
6%synergy
Morphic Pool
23%inclusion14 decks61 decks
-11%synergy
Vault of Champions
23%inclusion14 decks61 decks
-10%synergy
Fabled Passage
21%inclusion13 decks61 decks
14%synergy
Terramorphic Expanse
21%inclusion13 decks61 decks
4%synergy
Gloomlake Verge
21%inclusion13 decks61 decks
10%synergy
Temple of Silence
21%inclusion13 decks61 decks
2%synergy
Tainted Field
20%inclusion12 decks61 decks
13%synergy
Floodfarm Verge
20%inclusion12 decks61 decks
8%synergy
Tainted Isle
18%inclusion11 decks61 decks
12%synergy
Temple of Deceit
16%inclusion10 decks61 decks
-2%synergy
Port Town
15%inclusion9 decks61 decks
-2%synergy
Sink into Stupor
15%inclusion9 decks61 decks
2%synergy
Shattered Sanctum
15%inclusion9 decks61 decks
-1%synergy
City of Brass
15%inclusion9 decks61 decks
0%synergy
Fell the Profane
13%inclusion8 decks61 decks
4%synergy
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