The Master of Keys (Commander) - Combo

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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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
Back to Top
Noggle the Mind
13%inclusion4 decks32 decks
12%synergy
Weather Maker
3.3%inclusion1 decks30 decks
3%synergy
Aquitect's Defenses
3.1%inclusion1 decks32 decks
3%synergy
Emptiness
1.7%inclusion1 decks58 decks
2%synergy
High Synergy Cards
Animate Dead
91%inclusion196 decks216 decks
81%synergy
Necromancy
80%inclusion173 decks216 decks
75%synergy
Abdel Adrian, Gorion's Ward
73%inclusion158 decks216 decks
71%synergy
Dress Down
72%inclusion156 decks216 decks
70%synergy
Entomb
74%inclusion160 decks216 decks
67%synergy
Mystic Remora
84%inclusion181 decks216 decks
63%synergy
Dance of the Dead
64%inclusion139 decks216 decks
62%synergy
Sevinne's Reclamation
69%inclusion149 decks216 decks
60%synergy
Dark Ritual
71%inclusion153 decks216 decks
51%synergy
Ripples of Undeath
53%inclusion114 decks216 decks
50%synergy
Top Cards
Esper Sentinel
69%inclusion149 decks216 decks
41%synergy
Swan Song
65%inclusion140 decks216 decks
45%synergy
Swords to Plowshares
65%inclusion140 decks216 decks
-3%synergy
Silence
59%inclusion127 decks216 decks
49%synergy
Blind Obedience
58%inclusion126 decks216 decks
46%synergy
Grand Abolisher
58%inclusion126 decks216 decks
44%synergy
Demonic Consultation
56%inclusion121 decks216 decks
48%synergy
Orcish Bowmasters
55%inclusion119 decks216 decks
44%synergy
Force of Negation
55%inclusion118 decks216 decks
43%synergy
Lotho, Corrupt Shirriff
54%inclusion117 decks216 decks
37%synergy
Game Changers
Rhystic Study
76%inclusion164 decks216 decks
44%synergy
Smothering Tithe
74%inclusion159 decks216 decks
42%synergy
Enlightened Tutor
71%inclusion153 decks216 decks
51%synergy
Demonic Tutor
70%inclusion151 decks216 decks
49%synergy
Vampiric Tutor
66%inclusion143 decks216 decks
49%synergy
Thassa's Oracle
65%inclusion141 decks216 decks
56%synergy
Force of Will
60%inclusion130 decks216 decks
48%synergy
Mana Vault
60%inclusion129 decks216 decks
51%synergy
Ancient Tomb
59%inclusion128 decks216 decks
46%synergy
Chrome Mox
57%inclusion124 decks216 decks
48%synergy
Creatures
Valley Floodcaller
51%inclusion111 decks216 decks
47%synergy
Ranger-Captain of Eos
49%inclusion105 decks216 decks
42%synergy
Displacer Kitten
40%inclusion86 decks216 decks
33%synergy
Wan Shi Tong, Librarian
37%inclusion18 decks49 decks
32%synergy
Hullbreaker Horror
37%inclusion79 decks216 decks
30%synergy
Voice of Victory
34%inclusion45 decks132 decks
26%synergy
Opposition Agent
33%inclusion71 decks216 decks
24%synergy
Mockingbird
33%inclusion71 decks216 decks
28%synergy
Archivist of Oghma
30%inclusion65 decks216 decks
23%synergy
Entity Tracker
27%inclusion59 decks216 decks
21%synergy
Lurrus of the Dream-Den
25%inclusion55 decks216 decks
24%synergy
Inquisitive Glimmer
25%inclusion54 decks216 decks
18%synergy
Drannith Magistrate
25%inclusion53 decks216 decks
17%synergy
Auriok Salvagers
24%inclusion52 decks216 decks
24%synergy
Ledger Shredder
24%inclusion51 decks216 decks
15%synergy
Mesa Enchantress
23%inclusion50 decks216 decks
14%synergy
Scrabbling Skullcrab
22%inclusion48 decks216 decks
21%synergy
Grim Guardian
20%inclusion44 decks216 decks
18%synergy
Hedron Crab
20%inclusion43 decks216 decks
19%synergy
Gravebreaker Lamia
19%inclusion41 decks216 decks
18%synergy
Demon of Fate's Design
19%inclusion41 decks216 decks
14%synergy
Overlord of the Balemurk
19%inclusion41 decks216 decks
17%synergy
Phyrexian Metamorph
19%inclusion41 decks216 decks
10%synergy
Talion, the Kindly Lord
19%inclusion40 decks216 decks
11%synergy
Starfield Mystic
17%inclusion37 decks216 decks
10%synergy
Faerie Mastermind
16%inclusion35 decks216 decks
7%synergy
Fear of Impostors
15%inclusion33 decks216 decks
14%synergy
Zur the Enchanter
15%inclusion33 decks216 decks
10%synergy
Fear of Sleep Paralysis
15%inclusion33 decks216 decks
10%synergy
Overlord of the Floodpits
15%inclusion32 decks216 decks
11%synergy
Psychic Frog
15%inclusion32 decks216 decks
8%synergy
Tataru Taru
15%inclusion15 decks103 decks
6%synergy
Doomwake Giant
14%inclusion30 decks216 decks
8%synergy
Leonin Relic-Warder
13%inclusion29 decks216 decks
13%synergy
Zur, Eternal Schemer
13%inclusion29 decks216 decks
10%synergy
Ondu Spiritdancer
13%inclusion29 decks216 decks
7%synergy
Ghostly Pilferer
13%inclusion27 decks216 decks
5%synergy
Victor, Valgavoth's Seneschal
12%inclusion26 decks216 decks
10%synergy
Moon-Blessed Cleric
11%inclusion24 decks216 decks
6%synergy
Ghostly Dancers
11%inclusion24 decks216 decks
9%synergy
Pollywog Prodigy
11%inclusion23 decks216 decks
7%synergy
Laboratory Maniac
10%inclusion22 decks216 decks
7%synergy
Heliod, the Radiant Dawn
10%inclusion22 decks216 decks
6%synergy
Snapcaster Mage
9.3%inclusion20 decks216 decks
7%synergy
Enduring Curiosity
8.3%inclusion18 decks216 decks
0%synergy
Hoarding Broodlord
7.9%inclusion17 decks216 decks
6%synergy
Gremlin Tamer
7.9%inclusion17 decks216 decks
7%synergy
Sage of Mysteries
7.4%inclusion16 decks216 decks
7%synergy
Balemurk Leech
7.4%inclusion16 decks216 decks
7%synergy
Dauthi Voidwalker
6.9%inclusion15 decks216 decks
1%synergy
Instants
Tainted Pact
54%inclusion116 decks216 decks
47%synergy
Flusterstorm
54%inclusion116 decks216 decks
46%synergy
An Offer You Can't Refuse
49%inclusion105 decks216 decks
22%synergy
Mystical Tutor
49%inclusion105 decks216 decks
37%synergy
Mental Misstep
48%inclusion103 decks216 decks
41%synergy
Fierce Guardianship
48%inclusion103 decks216 decks
27%synergy
Mindbreak Trap
47%inclusion102 decks216 decks
40%synergy
Pact of Negation
47%inclusion101 decks216 decks
39%synergy
Intuition
46%inclusion100 decks216 decks
45%synergy
Borne Upon a Wind
46%inclusion100 decks216 decks
41%synergy
Cyclonic Rift
43%inclusion92 decks216 decks
19%synergy
Cabal Ritual
42%inclusion91 decks216 decks
39%synergy
Gifts Ungiven
27%inclusion59 decks216 decks
25%synergy
Sink into Stupor
27%inclusion59 decks216 decks
15%synergy
Mana Drain
27%inclusion58 decks216 decks
9%synergy
Into the Flood Maw
26%inclusion57 decks216 decks
23%synergy
Chain of Vapor
25%inclusion55 decks216 decks
22%synergy
Counterspell
22%inclusion48 decks216 decks
-19%synergy
Path to Exile
19%inclusion42 decks216 decks
-23%synergy
Dovin's Veto
17%inclusion36 decks216 decks
-9%synergy
Retraction Helix
14%inclusion31 decks216 decks
14%synergy
Brain Freeze
14%inclusion31 decks216 decks
14%synergy
Arcane Denial
13%inclusion27 decks216 decks
-8%synergy
Culling the Weak
12%inclusion25 decks216 decks
10%synergy
Ad Nauseam
12%inclusion25 decks216 decks
9%synergy
Darkblast
10%inclusion22 decks216 decks
10%synergy
Frantic Search
10%inclusion21 decks216 decks
-8%synergy
Deadly Rollick
8.8%inclusion19 decks216 decks
-6%synergy
Brainstorm
8.8%inclusion19 decks216 decks
-8%synergy
Dispel
8.3%inclusion18 decks216 decks
5%synergy
Banishing Knack
8.3%inclusion18 decks216 decks
8%synergy
Strix Serenade
7.9%inclusion17 decks216 decks
4%synergy
Muddle the Mixture
7.4%inclusion16 decks216 decks
4%synergy
Sacrifice
7.4%inclusion16 decks216 decks
7%synergy
Void Rend
7.4%inclusion16 decks216 decks
-27%synergy
Saw in Half
7.4%inclusion16 decks216 decks
5%synergy
Negate
6.5%inclusion14 decks216 decks
-10%synergy
Fell the Profane
6.0%inclusion13 decks216 decks
-3%synergy
Teferi's Protection
6.0%inclusion13 decks216 decks
-11%synergy
Lim-Dûl's Vault
6.0%inclusion13 decks216 decks
3%synergy
Thirst for Meaning
6.0%inclusion13 decks216 decks
5%synergy
Orim's Chant
5.6%inclusion12 decks216 decks
4%synergy
Otherworldly Gaze
5.1%inclusion11 decks216 decks
3%synergy
Sorceries
Imperial Seal
46%inclusion100 decks216 decks
39%synergy
Reanimate
36%inclusion77 decks216 decks
19%synergy
Toxic Deluge
32%inclusion70 decks216 decks
13%synergy
Windfall
29%inclusion62 decks216 decks
15%synergy
Lively Dirge
23%inclusion49 decks216 decks
21%synergy
Beseech the Mirror
18%inclusion39 decks216 decks
14%synergy
Demonic Counsel
16%inclusion34 decks216 decks
15%synergy
Unmarked Grave
13%inclusion29 decks216 decks
12%synergy
Mnemonic Betrayal
12%inclusion26 decks216 decks
9%synergy
Singularity Rupture
12%inclusion10 decks85 decks
9%synergy
Redress Fate
9.3%inclusion20 decks216 decks
3%synergy
Diabolic Intent
8.8%inclusion19 decks216 decks
4%synergy
Cabal Therapy
8.3%inclusion18 decks216 decks
8%synergy
Yawgmoth's Will
7.9%inclusion17 decks216 decks
7%synergy
Buried Alive
7.9%inclusion17 decks216 decks
4%synergy
Idyllic Tutor
7.4%inclusion16 decks216 decks
3%synergy
Supreme Verdict
6.9%inclusion15 decks216 decks
-8%synergy
Damn
6.9%inclusion15 decks216 decks
-13%synergy
Dance of the Manse
6.5%inclusion14 decks216 decks
3%synergy
Praetor's Grasp
5.6%inclusion12 decks216 decks
3%synergy
Grim Tutor
5.6%inclusion12 decks216 decks
1%synergy
Gitaxian Probe
5.1%inclusion11 decks216 decks
3%synergy
Glimpse the Unthinkable
5.1%inclusion11 decks216 decks
5%synergy
Utility Artifacts
The One Ring
50%inclusion108 decks216 decks
37%synergy
Wishclaw Talisman
45%inclusion98 decks216 decks
37%synergy
Mesmeric Orb
10%inclusion22 decks216 decks
9%synergy
Sensei's Divining Top
6.5%inclusion14 decks216 decks
-3%synergy
Cursed Totem
6.5%inclusion14 decks216 decks
4%synergy
Cloud Key
5.1%inclusion11 decks216 decks
2%synergy
Isochron Scepter
5.1%inclusion11 decks216 decks
3%synergy
Agatha's Soul Cauldron
5.1%inclusion11 decks216 decks
5%synergy
Enchantments
Necropotence
50%inclusion108 decks216 decks
43%synergy
Tinybones Joins Up
47%inclusion101 decks216 decks
46%synergy
Amphibian Downpour
42%inclusion90 decks216 decks
37%synergy
Touch the Spirit Realm
39%inclusion85 decks216 decks
37%synergy
Mirrormade
39%inclusion85 decks216 decks
30%synergy
The Meathook Massacre
29%inclusion63 decks216 decks
26%synergy
Static Prison
28%inclusion61 decks216 decks
28%synergy
Copy Artifact
22%inclusion47 decks216 decks
21%synergy
Propaganda
21%inclusion46 decks216 decks
-6%synergy
Seal of Cleansing
20%inclusion43 decks216 decks
18%synergy
Grasp of Fate
19%inclusion40 decks216 decks
12%synergy
Sphere of Safety
19%inclusion40 decks216 decks
9%synergy
Ghostly Prison
16%inclusion35 decks216 decks
-6%synergy
Stillness in Motion
16%inclusion20 decks127 decks
15%synergy
Founding the Third Path
15%inclusion33 decks216 decks
15%synergy
Chthonian Nightmare
15%inclusion32 decks216 decks
14%synergy
Secret Arcade // Dusty Parlor
14%inclusion31 decks216 decks
10%synergy
Copy Enchantment
13%inclusion29 decks216 decks
9%synergy
Counterbalance
13%inclusion28 decks216 decks
11%synergy
Steal Enchantment
13%inclusion28 decks216 decks
12%synergy
Estrid's Invocation
13%inclusion28 decks216 decks
8%synergy
Trouble in Pairs
13%inclusion27 decks216 decks
7%synergy
Monologue Tax
13%inclusion27 decks216 decks
6%synergy
Teval's Judgment
12%inclusion16 decks131 decks
11%synergy
Cemetery Tampering
12%inclusion26 decks216 decks
11%synergy
Leyline of Anticipation
11%inclusion24 decks216 decks
7%synergy
Seal of Removal
11%inclusion24 decks216 decks
11%synergy
Out of the Tombs
10%inclusion22 decks216 decks
10%synergy
Starfield of Nyx
10%inclusion21 decks216 decks
6%synergy
The Tale of Tamiyo
10%inclusion21 decks216 decks
9%synergy
Sigil of the Empty Throne
8.8%inclusion19 decks216 decks
3%synergy
Enchanted Evening
8.8%inclusion19 decks216 decks
7%synergy
Court of Cunning
8.3%inclusion18 decks216 decks
7%synergy
Aura of Silence
8.3%inclusion18 decks216 decks
5%synergy
Phyrexian Arena
8.3%inclusion18 decks216 decks
-6%synergy
Darksteel Mutation
7.9%inclusion17 decks216 decks
2%synergy
Black Market Connections
7.9%inclusion17 decks216 decks
-6%synergy
Greater Auramancy
7.9%inclusion17 decks216 decks
3%synergy
Imprisoned in the Moon
7.4%inclusion16 decks216 decks
1%synergy
Cacophony Unleashed
7.4%inclusion16 decks216 decks
6%synergy
Nowhere to Run
7.4%inclusion16 decks216 decks
6%synergy
Chains of Mephistopheles
7.4%inclusion16 decks216 decks
7%synergy
All That Glitters
6.9%inclusion15 decks216 decks
-2%synergy
Authority of the Consuls
6.0%inclusion13 decks216 decks
-6%synergy
Dance of Many
6.0%inclusion13 decks216 decks
6%synergy
Timely Ward
6.0%inclusion13 decks216 decks
1%synergy
Sheltered by Ghosts
6.0%inclusion13 decks216 decks
3%synergy
Restricted Office // Lecture Hall
5.6%inclusion12 decks216 decks
3%synergy
Bloodchief Ascension
5.6%inclusion12 decks216 decks
0%synergy
Defiled Crypt // Cadaver Lab
5.1%inclusion11 decks215 decks
4%synergy
Planeswalkers
Teferi, Time Raveler
38%inclusion82 decks216 decks
30%synergy
Utility Lands
Otawara, Soaring City
63%inclusion136 decks216 decks
44%synergy
Hall of Heliod's Generosity
32%inclusion69 decks216 decks
19%synergy
Urza's Saga
30%inclusion65 decks216 decks
18%synergy
Emergence Zone
22%inclusion47 decks216 decks
20%synergy
Cephalid Coliseum
19%inclusion42 decks216 decks
16%synergy
Takenuma, Abandoned Mire
17%inclusion36 decks216 decks
10%synergy
Bojuka Bog
16%inclusion35 decks216 decks
-11%synergy
Minamo, School at Water's Edge
15%inclusion33 decks216 decks
11%synergy
Serra's Sanctum
9.3%inclusion20 decks216 decks
7%synergy
Urborg, Tomb of Yawgmoth
9.3%inclusion20 decks216 decks
-4%synergy
City of Traitors
6.9%inclusion15 decks216 decks
6%synergy
Phyrexian Tower
6.0%inclusion13 decks216 decks
2%synergy
Reliquary Tower
5.6%inclusion12 decks216 decks
-28%synergy
Mana Artifacts
Sol Ring
96%inclusion208 decks216 decks
6%synergy
Arcane Signet
94%inclusion203 decks216 decks
6%synergy
Talisman of Dominance
73%inclusion158 decks216 decks
24%synergy
Lotus Petal
59%inclusion127 decks216 decks
48%synergy
Fellwar Stone
58%inclusion126 decks216 decks
25%synergy
Talisman of Progress
56%inclusion121 decks216 decks
12%synergy
Mox Diamond
49%inclusion106 decks216 decks
42%synergy
Mox Opal
46%inclusion99 decks216 decks
37%synergy
Talisman of Hierarchy
42%inclusion91 decks216 decks
-2%synergy
Lion's Eye Diamond
40%inclusion87 decks216 decks
38%synergy
Mox Amber
26%inclusion56 decks216 decks
20%synergy
Grim Monolith
22%inclusion47 decks216 decks
18%synergy
Orzhov Signet
14%inclusion31 decks216 decks
-19%synergy
Azorius Signet
13%inclusion29 decks216 decks
-18%synergy
Dimir Signet
13%inclusion28 decks216 decks
-18%synergy
Mind Stone
6.9%inclusion15 decks216 decks
-6%synergy
Lands
Command Tower
96%inclusion208 decks216 decks
4%synergy
Hallowed Fountain
81%inclusion174 decks216 decks
31%synergy
Watery Grave
81%inclusion174 decks216 decks
30%synergy
Flooded Strand
80%inclusion172 decks216 decks
41%synergy
Godless Shrine
79%inclusion170 decks216 decks
28%synergy
Polluted Delta
79%inclusion170 decks216 decks
41%synergy
Marsh Flats
73%inclusion158 decks216 decks
37%synergy
Island
68%inclusion147 decks216 decks
-25%synergy
Swamp
65%inclusion141 decks216 decks
-26%synergy
Exotic Orchard
63%inclusion136 decks216 decks
4%synergy
City of Brass
58%inclusion125 decks216 decks
43%synergy
Plains
57%inclusion124 decks216 decks
-34%synergy
Tundra
56%inclusion120 decks216 decks
40%synergy
Mana Confluence
56%inclusion120 decks216 decks
42%synergy
Underground Sea
55%inclusion119 decks216 decks
39%synergy
Scrubland
55%inclusion118 decks216 decks
39%synergy
Morphic Pool
53%inclusion114 decks216 decks
19%synergy
Gemstone Caverns
53%inclusion114 decks216 decks
45%synergy
Bloodstained Mire
53%inclusion114 decks216 decks
42%synergy
Misty Rainforest
48%inclusion104 decks216 decks
37%synergy
Undercity Sewers
48%inclusion103 decks216 decks
33%synergy
Verdant Catacombs
48%inclusion103 decks216 decks
38%synergy
Scalding Tarn
48%inclusion103 decks216 decks
37%synergy
Sea of Clouds
47%inclusion102 decks216 decks
12%synergy
Windswept Heath
44%inclusion96 decks216 decks
35%synergy
Vault of Champions
44%inclusion94 decks216 decks
11%synergy
Arid Mesa
39%inclusion84 decks216 decks
29%synergy
Underground River
31%inclusion66 decks216 decks
-3%synergy
Adarkar Wastes
28%inclusion61 decks216 decks
-3%synergy
Caves of Koilos
27%inclusion59 decks216 decks
-8%synergy
Sink into Stupor
27%inclusion59 decks216 decks
15%synergy
Meticulous Archive
26%inclusion56 decks216 decks
12%synergy
Arcane Sanctum
25%inclusion54 decks216 decks
-29%synergy
Raffine's Tower
25%inclusion53 decks216 decks
-16%synergy
Shadowy Backstreet
23%inclusion49 decks216 decks
10%synergy
Glacial Fortress
20%inclusion44 decks216 decks
-21%synergy
Isolated Chapel
16%inclusion35 decks216 decks
-24%synergy
Drowned Catacomb
15%inclusion33 decks216 decks
-21%synergy
Gloomlake Verge
14%inclusion31 decks216 decks
3%synergy
Starting Town
14%inclusion14 decks103 decks
9%synergy
Floodfarm Verge
13%inclusion28 decks216 decks
2%synergy
Contaminated Landscape
13%inclusion27 decks216 decks
-2%synergy
Prairie Stream
12%inclusion26 decks216 decks
-29%synergy
Terramorphic Expanse
12%inclusion25 decks216 decks
-5%synergy
Valgavoth's Lair
11%inclusion24 decks216 decks
8%synergy
Sunken Hollow
11%inclusion24 decks216 decks
-29%synergy
Tainted Field
11%inclusion23 decks216 decks
4%synergy
Evolving Wilds
11%inclusion23 decks216 decks
-14%synergy
Shipwreck Marsh
11%inclusion23 decks216 decks
-10%synergy
Forbidden Orchard
11%inclusion23 decks216 decks
8%synergy
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