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
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Wan Shi Tong, Librarian
38%inclusion10 decks26 decks
34%synergy
Appa, Steadfast Guardian
1.8%inclusion1 decks57 decks
2%synergy
High Synergy Cards
Animate Dead
90%inclusion183 decks203 decks
80%synergy
Necromancy
80%inclusion163 decks203 decks
76%synergy
Abdel Adrian, Gorion's Ward
75%inclusion152 decks203 decks
73%synergy
Dress Down
72%inclusion146 decks203 decks
69%synergy
Entomb
74%inclusion151 decks203 decks
67%synergy
Dance of the Dead
66%inclusion133 decks203 decks
63%synergy
Mystic Remora
84%inclusion170 decks203 decks
62%synergy
Sevinne's Reclamation
67%inclusion135 decks203 decks
58%synergy
Dark Ritual
71%inclusion145 decks203 decks
52%synergy
Ripples of Undeath
54%inclusion109 decks203 decks
51%synergy
Top Cards
Esper Sentinel
70%inclusion143 decks203 decks
43%synergy
Swan Song
67%inclusion136 decks203 decks
48%synergy
Swords to Plowshares
65%inclusion132 decks203 decks
-3%synergy
Grand Abolisher
62%inclusion125 decks203 decks
47%synergy
Silence
60%inclusion122 decks203 decks
50%synergy
Blind Obedience
59%inclusion119 decks203 decks
46%synergy
Demonic Consultation
58%inclusion117 decks203 decks
49%synergy
Force of Negation
57%inclusion116 decks203 decks
45%synergy
Orcish Bowmasters
57%inclusion116 decks203 decks
46%synergy
Tainted Pact
56%inclusion114 decks203 decks
49%synergy
Game Changers
Rhystic Study
78%inclusion159 decks203 decks
46%synergy
Smothering Tithe
75%inclusion152 decks203 decks
43%synergy
Enlightened Tutor
72%inclusion147 decks203 decks
52%synergy
Demonic Tutor
71%inclusion145 decks203 decks
50%synergy
Vampiric Tutor
68%inclusion138 decks203 decks
50%synergy
Thassa's Oracle
67%inclusion136 decks203 decks
57%synergy
Mana Vault
62%inclusion126 decks203 decks
53%synergy
Force of Will
62%inclusion126 decks203 decks
49%synergy
Ancient Tomb
62%inclusion125 decks203 decks
48%synergy
Chrome Mox
60%inclusion121 decks203 decks
50%synergy
Creatures
Lotho, Corrupt Shirriff
55%inclusion112 decks203 decks
38%synergy
Valley Floodcaller
53%inclusion108 decks203 decks
49%synergy
Ranger-Captain of Eos
50%inclusion102 decks203 decks
44%synergy
Displacer Kitten
41%inclusion84 decks203 decks
34%synergy
Hullbreaker Horror
39%inclusion80 decks203 decks
33%synergy
Opposition Agent
34%inclusion70 decks203 decks
26%synergy
Voice of Victory
34%inclusion40 decks116 decks
26%synergy
Mockingbird
33%inclusion68 decks203 decks
29%synergy
Archivist of Oghma
33%inclusion67 decks203 decks
26%synergy
Lurrus of the Dream-Den
27%inclusion55 decks203 decks
25%synergy
Entity Tracker
27%inclusion54 decks203 decks
20%synergy
Drannith Magistrate
25%inclusion51 decks203 decks
17%synergy
Ledger Shredder
24%inclusion49 decks203 decks
15%synergy
Auriok Salvagers
24%inclusion48 decks203 decks
23%synergy
Inquisitive Glimmer
23%inclusion47 decks203 decks
15%synergy
Mesa Enchantress
22%inclusion45 decks203 decks
13%synergy
Scrabbling Skullcrab
21%inclusion42 decks203 decks
20%synergy
Phyrexian Metamorph
21%inclusion42 decks203 decks
12%synergy
Grim Guardian
20%inclusion41 decks203 decks
18%synergy
Talion, the Kindly Lord
19%inclusion39 decks203 decks
11%synergy
Overlord of the Balemurk
19%inclusion38 decks203 decks
17%synergy
Gravebreaker Lamia
18%inclusion37 decks203 decks
17%synergy
Hedron Crab
18%inclusion37 decks203 decks
18%synergy
Starfield Mystic
18%inclusion36 decks203 decks
11%synergy
Demon of Fate's Design
18%inclusion36 decks203 decks
12%synergy
Psychic Frog
17%inclusion34 decks203 decks
10%synergy
Faerie Mastermind
16%inclusion33 decks203 decks
7%synergy
Tataru Taru
15%inclusion13 decks87 decks
7%synergy
Fear of Sleep Paralysis
15%inclusion30 decks203 decks
9%synergy
Fear of Impostors
14%inclusion29 decks203 decks
13%synergy
Ondu Spiritdancer
14%inclusion28 decks203 decks
8%synergy
Zur the Enchanter
14%inclusion28 decks203 decks
9%synergy
Overlord of the Floodpits
13%inclusion27 decks203 decks
9%synergy
Zur, Eternal Schemer
13%inclusion27 decks203 decks
10%synergy
Ghostly Pilferer
13%inclusion27 decks203 decks
6%synergy
Leonin Relic-Warder
13%inclusion26 decks203 decks
13%synergy
Doomwake Giant
12%inclusion25 decks203 decks
6%synergy
Pollywog Prodigy
12%inclusion25 decks203 decks
8%synergy
Victor, Valgavoth's Seneschal
11%inclusion23 decks203 decks
9%synergy
Moon-Blessed Cleric
11%inclusion22 decks203 decks
6%synergy
Ghostly Dancers
11%inclusion22 decks203 decks
8%synergy
Heliod, the Radiant Dawn
10%inclusion21 decks203 decks
6%synergy
Snapcaster Mage
9.4%inclusion19 decks203 decks
7%synergy
Laboratory Maniac
9.4%inclusion19 decks203 decks
6%synergy
Hoarding Broodlord
8.4%inclusion17 decks203 decks
7%synergy
Enduring Curiosity
8.4%inclusion17 decks203 decks
1%synergy
Gremlin Tamer
7.9%inclusion16 decks203 decks
7%synergy
Balemurk Leech
7.9%inclusion16 decks203 decks
7%synergy
Dauthi Voidwalker
7.9%inclusion16 decks203 decks
2%synergy
Sage of Mysteries
6.4%inclusion13 decks203 decks
6%synergy
Instants
Flusterstorm
56%inclusion113 decks203 decks
47%synergy
An Offer You Can't Refuse
50%inclusion102 decks203 decks
24%synergy
Fierce Guardianship
50%inclusion101 decks203 decks
29%synergy
Mystical Tutor
50%inclusion101 decks203 decks
38%synergy
Mental Misstep
49%inclusion100 decks203 decks
42%synergy
Mindbreak Trap
49%inclusion100 decks203 decks
42%synergy
Pact of Negation
49%inclusion99 decks203 decks
41%synergy
Intuition
47%inclusion96 decks203 decks
46%synergy
Borne Upon a Wind
47%inclusion95 decks203 decks
42%synergy
Cabal Ritual
44%inclusion90 decks203 decks
41%synergy
Cyclonic Rift
44%inclusion90 decks203 decks
20%synergy
Sink into Stupor
29%inclusion59 decks203 decks
17%synergy
Mana Drain
29%inclusion58 decks203 decks
11%synergy
Gifts Ungiven
28%inclusion56 decks203 decks
25%synergy
Into the Flood Maw
27%inclusion55 decks203 decks
23%synergy
Chain of Vapor
26%inclusion53 decks203 decks
23%synergy
Counterspell
22%inclusion44 decks203 decks
-20%synergy
Path to Exile
19%inclusion38 decks203 decks
-23%synergy
Dovin's Veto
17%inclusion34 decks203 decks
-8%synergy
Retraction Helix
16%inclusion32 decks203 decks
15%synergy
Brain Freeze
14%inclusion28 decks203 decks
13%synergy
Culling the Weak
13%inclusion27 decks203 decks
12%synergy
Arcane Denial
12%inclusion24 decks203 decks
-8%synergy
Ad Nauseam
11%inclusion23 decks203 decks
9%synergy
Frantic Search
9.4%inclusion19 decks203 decks
-8%synergy
Brainstorm
9.4%inclusion19 decks203 decks
-8%synergy
Darkblast
9.4%inclusion19 decks203 decks
9%synergy
Dispel
8.9%inclusion18 decks203 decks
5%synergy
Banishing Knack
8.9%inclusion18 decks203 decks
9%synergy
Deadly Rollick
8.9%inclusion18 decks203 decks
-5%synergy
Strix Serenade
8.4%inclusion17 decks203 decks
5%synergy
Sacrifice
7.9%inclusion16 decks203 decks
7%synergy
Muddle the Mixture
7.9%inclusion16 decks203 decks
4%synergy
Void Rend
7.4%inclusion15 decks203 decks
-26%synergy
Saw in Half
7.4%inclusion15 decks203 decks
5%synergy
Negate
6.4%inclusion13 decks203 decks
-10%synergy
Teferi's Protection
6.4%inclusion13 decks203 decks
-11%synergy
Thirst for Meaning
5.9%inclusion12 decks203 decks
4%synergy
Fell the Profane
5.9%inclusion12 decks203 decks
-3%synergy
Lim-Dûl's Vault
5.9%inclusion12 decks203 decks
2%synergy
Sorceries
Imperial Seal
47%inclusion96 decks203 decks
40%synergy
Reanimate
35%inclusion71 decks203 decks
19%synergy
Toxic Deluge
33%inclusion68 decks203 decks
14%synergy
Windfall
29%inclusion58 decks203 decks
15%synergy
Lively Dirge
21%inclusion43 decks203 decks
20%synergy
Beseech the Mirror
18%inclusion36 decks203 decks
14%synergy
Demonic Counsel
17%inclusion35 decks203 decks
16%synergy
Unmarked Grave
13%inclusion26 decks203 decks
11%synergy
Mnemonic Betrayal
12%inclusion24 decks203 decks
9%synergy
Singularity Rupture
10%inclusion7 decks68 decks
8%synergy
Diabolic Intent
8.4%inclusion17 decks203 decks
3%synergy
Cabal Therapy
7.9%inclusion16 decks203 decks
8%synergy
Damn
7.9%inclusion16 decks203 decks
-13%synergy
Redress Fate
7.9%inclusion16 decks203 decks
2%synergy
Yawgmoth's Will
7.9%inclusion16 decks203 decks
7%synergy
Buried Alive
7.4%inclusion15 decks203 decks
3%synergy
Idyllic Tutor
6.9%inclusion14 decks203 decks
3%synergy
Dance of the Manse
6.9%inclusion14 decks203 decks
3%synergy
Supreme Verdict
6.4%inclusion13 decks203 decks
-9%synergy
Grim Tutor
6.4%inclusion13 decks203 decks
2%synergy
Praetor's Grasp
6.4%inclusion13 decks203 decks
3%synergy
Utility Artifacts
The One Ring
53%inclusion107 decks203 decks
39%synergy
Wishclaw Talisman
47%inclusion96 decks203 decks
39%synergy
Mesmeric Orb
10%inclusion20 decks203 decks
9%synergy
Sensei's Divining Top
6.9%inclusion14 decks203 decks
-3%synergy
Cursed Totem
6.9%inclusion14 decks203 decks
5%synergy
Agatha's Soul Cauldron
5.4%inclusion11 decks203 decks
5%synergy
Isochron Scepter
5.4%inclusion11 decks203 decks
3%synergy
Enchantments
Necropotence
51%inclusion104 decks203 decks
44%synergy
Tinybones Joins Up
47%inclusion96 decks203 decks
46%synergy
Touch the Spirit Realm
41%inclusion84 decks203 decks
39%synergy
Amphibian Downpour
41%inclusion84 decks203 decks
37%synergy
Mirrormade
39%inclusion79 decks203 decks
29%synergy
The Meathook Massacre
28%inclusion56 decks203 decks
24%synergy
Static Prison
27%inclusion55 decks203 decks
27%synergy
Copy Artifact
23%inclusion46 decks203 decks
22%synergy
Propaganda
20%inclusion40 decks203 decks
-7%synergy
Seal of Cleansing
18%inclusion36 decks203 decks
16%synergy
Sphere of Safety
17%inclusion35 decks203 decks
8%synergy
Grasp of Fate
16%inclusion33 decks203 decks
10%synergy
Steal Enchantment
15%inclusion31 decks203 decks
14%synergy
Chthonian Nightmare
15%inclusion30 decks203 decks
14%synergy
Ghostly Prison
15%inclusion30 decks203 decks
-7%synergy
Stillness in Motion
14%inclusion16 decks111 decks
14%synergy
Secret Arcade // Dusty Parlor
14%inclusion29 decks203 decks
9%synergy
Founding the Third Path
14%inclusion28 decks203 decks
14%synergy
Estrid's Invocation
13%inclusion27 decks203 decks
9%synergy
Counterbalance
13%inclusion27 decks203 decks
12%synergy
Trouble in Pairs
13%inclusion27 decks203 decks
8%synergy
Copy Enchantment
13%inclusion26 decks203 decks
8%synergy
Monologue Tax
12%inclusion25 decks203 decks
6%synergy
Cemetery Tampering
11%inclusion23 decks203 decks
11%synergy
Seal of Removal
11%inclusion23 decks203 decks
11%synergy
Leyline of Anticipation
11%inclusion22 decks203 decks
6%synergy
Teval's Judgment
10%inclusion12 decks115 decks
10%synergy
Out of the Tombs
10%inclusion20 decks203 decks
9%synergy
Enchanted Evening
10%inclusion20 decks203 decks
8%synergy
Starfield of Nyx
9.4%inclusion19 decks203 decks
5%synergy
Aura of Silence
8.9%inclusion18 decks203 decks
6%synergy
Darksteel Mutation
8.4%inclusion17 decks203 decks
2%synergy
The Tale of Tamiyo
8.4%inclusion17 decks203 decks
8%synergy
Black Market Connections
8.4%inclusion17 decks203 decks
-6%synergy
Sigil of the Empty Throne
8.4%inclusion17 decks203 decks
2%synergy
Phyrexian Arena
7.9%inclusion16 decks203 decks
-6%synergy
Chains of Mephistopheles
7.9%inclusion16 decks203 decks
8%synergy
Cacophony Unleashed
6.9%inclusion14 decks203 decks
5%synergy
Court of Cunning
6.9%inclusion14 decks203 decks
6%synergy
Greater Auramancy
6.9%inclusion14 decks203 decks
2%synergy
Imprisoned in the Moon
6.4%inclusion13 decks203 decks
0%synergy
All That Glitters
6.4%inclusion13 decks203 decks
-2%synergy
Nowhere to Run
6.4%inclusion13 decks203 decks
5%synergy
Authority of the Consuls
5.9%inclusion12 decks203 decks
-5%synergy
Dance of Many
5.9%inclusion12 decks203 decks
6%synergy
Timely Ward
5.9%inclusion12 decks203 decks
1%synergy
Exquisite Blood
5.4%inclusion11 decks203 decks
-1%synergy
Sheltered by Ghosts
5.4%inclusion11 decks203 decks
3%synergy
Planeswalkers
Teferi, Time Raveler
39%inclusion80 decks203 decks
31%synergy
Utility Lands
Otawara, Soaring City
65%inclusion132 decks203 decks
46%synergy
Urza's Saga
31%inclusion62 decks203 decks
19%synergy
Hall of Heliod's Generosity
30%inclusion61 decks203 decks
17%synergy
Emergence Zone
23%inclusion46 decks203 decks
21%synergy
Cephalid Coliseum
20%inclusion40 decks203 decks
16%synergy
Minamo, School at Water's Edge
17%inclusion35 decks203 decks
13%synergy
Takenuma, Abandoned Mire
16%inclusion33 decks203 decks
10%synergy
Bojuka Bog
14%inclusion29 decks203 decks
-13%synergy
Urborg, Tomb of Yawgmoth
9.4%inclusion19 decks203 decks
-4%synergy
Serra's Sanctum
8.9%inclusion18 decks203 decks
7%synergy
City of Traitors
6.4%inclusion13 decks203 decks
5%synergy
Mistrise Village
5.2%inclusion6 decks116 decks
1%synergy
Mana Artifacts
Sol Ring
96%inclusion195 decks203 decks
6%synergy
Arcane Signet
95%inclusion192 decks203 decks
7%synergy
Talisman of Dominance
75%inclusion152 decks203 decks
26%synergy
Fellwar Stone
61%inclusion124 decks203 decks
27%synergy
Lotus Petal
60%inclusion122 decks203 decks
49%synergy
Talisman of Progress
57%inclusion115 decks203 decks
14%synergy
Mox Diamond
50%inclusion102 decks203 decks
43%synergy
Mox Opal
48%inclusion98 decks203 decks
39%synergy
Talisman of Hierarchy
42%inclusion85 decks203 decks
-1%synergy
Lion's Eye Diamond
40%inclusion81 decks203 decks
38%synergy
Mox Amber
27%inclusion55 decks203 decks
21%synergy
Grim Monolith
24%inclusion49 decks203 decks
21%synergy
Orzhov Signet
14%inclusion29 decks203 decks
-20%synergy
Azorius Signet
13%inclusion27 decks203 decks
-19%synergy
Dimir Signet
13%inclusion26 decks203 decks
-20%synergy
Mind Stone
7.4%inclusion15 decks203 decks
-6%synergy
Commander's Sphere
5.4%inclusion11 decks203 decks
-14%synergy
Lands
Command Tower
97%inclusion196 decks203 decks
4%synergy
Hallowed Fountain
81%inclusion165 decks203 decks
32%synergy
Godless Shrine
81%inclusion164 decks203 decks
31%synergy
Flooded Strand
81%inclusion164 decks203 decks
43%synergy
Watery Grave
80%inclusion163 decks203 decks
31%synergy
Polluted Delta
80%inclusion162 decks203 decks
43%synergy
Marsh Flats
73%inclusion149 decks203 decks
37%synergy
Island
67%inclusion137 decks203 decks
-25%synergy
Exotic Orchard
64%inclusion130 decks203 decks
6%synergy
Swamp
64%inclusion129 decks203 decks
-28%synergy
City of Brass
59%inclusion120 decks203 decks
44%synergy
Mana Confluence
58%inclusion117 decks203 decks
44%synergy
Plains
56%inclusion113 decks203 decks
-36%synergy
Tundra
56%inclusion113 decks203 decks
40%synergy
Underground Sea
55%inclusion112 decks203 decks
39%synergy
Morphic Pool
55%inclusion111 decks203 decks
20%synergy
Scrubland
55%inclusion111 decks203 decks
39%synergy
Bloodstained Mire
54%inclusion110 decks203 decks
43%synergy
Gemstone Caverns
54%inclusion110 decks203 decks
46%synergy
Misty Rainforest
49%inclusion100 decks203 decks
38%synergy
Undercity Sewers
49%inclusion99 decks203 decks
35%synergy
Sea of Clouds
49%inclusion99 decks203 decks
13%synergy
Scalding Tarn
49%inclusion99 decks203 decks
38%synergy
Verdant Catacombs
49%inclusion99 decks203 decks
38%synergy
Windswept Heath
45%inclusion92 decks203 decks
35%synergy
Vault of Champions
43%inclusion87 decks203 decks
10%synergy
Arid Mesa
38%inclusion78 decks203 decks
28%synergy
Underground River
30%inclusion61 decks203 decks
-2%synergy
Sink into Stupor
29%inclusion59 decks203 decks
17%synergy
Adarkar Wastes
28%inclusion57 decks203 decks
-3%synergy
Caves of Koilos
27%inclusion54 decks203 decks
-9%synergy
Meticulous Archive
26%inclusion53 decks203 decks
13%synergy
Raffine's Tower
24%inclusion48 decks203 decks
-17%synergy
Arcane Sanctum
24%inclusion48 decks203 decks
-31%synergy
Shadowy Backstreet
23%inclusion47 decks203 decks
11%synergy
Glacial Fortress
20%inclusion41 decks203 decks
-19%synergy
Isolated Chapel
15%inclusion31 decks203 decks
-23%synergy
Drowned Catacomb
14%inclusion29 decks203 decks
-21%synergy
Starting Town
14%inclusion12 decks87 decks
10%synergy
Gloomlake Verge
13%inclusion27 decks203 decks
2%synergy
Contaminated Landscape
13%inclusion26 decks203 decks
-2%synergy
Prairie Stream
12%inclusion25 decks203 decks
-28%synergy
Floodfarm Verge
12%inclusion25 decks203 decks
1%synergy
Sunken Hollow
11%inclusion23 decks203 decks
-28%synergy
Forbidden Orchard
11%inclusion23 decks203 decks
9%synergy
Terramorphic Expanse
11%inclusion22 decks203 decks
-6%synergy
Valgavoth's Lair
11%inclusion22 decks203 decks
8%synergy
Reflecting Pool
11%inclusion22 decks203 decks
3%synergy
Spire of Industry
11%inclusion22 decks203 decks
2%synergy
Cavern of Souls
11%inclusion22 decks203 decks
4%synergy
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