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
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Enchantments
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Utility Lands
Mana Artifacts
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Wan Shi Tong, Librarian
43%inclusion9 decks21 decks
39%synergy
Appa, Steadfast Guardian
1.9%inclusion1 decks53 decks
2%synergy
High Synergy Cards
Animate Dead
91%inclusion182 decks200 decks
81%synergy
Necromancy
81%inclusion162 decks200 decks
76%synergy
Abdel Adrian, Gorion's Ward
76%inclusion151 decks200 decks
74%synergy
Dress Down
73%inclusion146 decks200 decks
70%synergy
Entomb
75%inclusion150 decks200 decks
68%synergy
Dance of the Dead
66%inclusion132 decks200 decks
64%synergy
Mystic Remora
85%inclusion169 decks200 decks
63%synergy
Sevinne's Reclamation
67%inclusion134 decks200 decks
58%synergy
Dark Ritual
72%inclusion143 decks200 decks
52%synergy
Ripples of Undeath
53%inclusion106 decks200 decks
50%synergy
Top Cards
Esper Sentinel
71%inclusion142 decks200 decks
43%synergy
Swan Song
68%inclusion135 decks200 decks
48%synergy
Swords to Plowshares
66%inclusion131 decks200 decks
-3%synergy
Grand Abolisher
62%inclusion124 decks200 decks
48%synergy
Silence
61%inclusion121 decks200 decks
50%synergy
Blind Obedience
59%inclusion118 decks200 decks
46%synergy
Demonic Consultation
58%inclusion116 decks200 decks
49%synergy
Force of Negation
57%inclusion115 decks200 decks
46%synergy
Orcish Bowmasters
57%inclusion115 decks200 decks
46%synergy
Tainted Pact
56%inclusion113 decks200 decks
49%synergy
Game Changers
Rhystic Study
79%inclusion158 decks200 decks
46%synergy
Smothering Tithe
75%inclusion150 decks200 decks
42%synergy
Enlightened Tutor
73%inclusion145 decks200 decks
52%synergy
Demonic Tutor
72%inclusion144 decks200 decks
50%synergy
Vampiric Tutor
69%inclusion137 decks200 decks
50%synergy
Thassa's Oracle
68%inclusion135 decks200 decks
58%synergy
Mana Vault
63%inclusion125 decks200 decks
53%synergy
Force of Will
63%inclusion125 decks200 decks
49%synergy
Ancient Tomb
62%inclusion124 decks200 decks
49%synergy
Chrome Mox
60%inclusion120 decks200 decks
50%synergy
Creatures
Lotho, Corrupt Shirriff
56%inclusion111 decks200 decks
39%synergy
Valley Floodcaller
54%inclusion107 decks200 decks
49%synergy
Ranger-Captain of Eos
51%inclusion101 decks200 decks
44%synergy
Displacer Kitten
42%inclusion84 decks200 decks
35%synergy
Hullbreaker Horror
40%inclusion80 decks200 decks
34%synergy
Opposition Agent
35%inclusion70 decks200 decks
26%synergy
Voice of Victory
35%inclusion39 decks113 decks
26%synergy
Mockingbird
34%inclusion68 decks200 decks
30%synergy
Archivist of Oghma
34%inclusion67 decks200 decks
27%synergy
Lurrus of the Dream-Den
28%inclusion55 decks200 decks
26%synergy
Entity Tracker
26%inclusion52 decks200 decks
19%synergy
Drannith Magistrate
26%inclusion52 decks200 decks
18%synergy
Ledger Shredder
25%inclusion49 decks200 decks
16%synergy
Auriok Salvagers
24%inclusion47 decks200 decks
23%synergy
Inquisitive Glimmer
23%inclusion45 decks200 decks
15%synergy
Mesa Enchantress
22%inclusion43 decks200 decks
12%synergy
Scrabbling Skullcrab
21%inclusion41 decks200 decks
19%synergy
Phyrexian Metamorph
21%inclusion41 decks200 decks
12%synergy
Talion, the Kindly Lord
20%inclusion39 decks200 decks
11%synergy
Grim Guardian
20%inclusion39 decks200 decks
17%synergy
Overlord of the Balemurk
19%inclusion37 decks200 decks
16%synergy
Gravebreaker Lamia
18%inclusion36 decks200 decks
17%synergy
Hedron Crab
18%inclusion36 decks200 decks
17%synergy
Starfield Mystic
18%inclusion35 decks200 decks
11%synergy
Demon of Fate's Design
17%inclusion34 decks200 decks
11%synergy
Psychic Frog
17%inclusion33 decks200 decks
10%synergy
Faerie Mastermind
17%inclusion33 decks200 decks
7%synergy
Fear of Sleep Paralysis
14%inclusion29 decks200 decks
9%synergy
Fear of Impostors
14%inclusion28 decks200 decks
12%synergy
Zur the Enchanter
14%inclusion28 decks200 decks
9%synergy
Ghostly Pilferer
14%inclusion27 decks200 decks
6%synergy
Ondu Spiritdancer
14%inclusion27 decks200 decks
7%synergy
Tataru Taru
13%inclusion11 decks83 decks
5%synergy
Overlord of the Floodpits
13%inclusion25 decks200 decks
9%synergy
Leonin Relic-Warder
13%inclusion25 decks200 decks
12%synergy
Zur, Eternal Schemer
13%inclusion25 decks200 decks
9%synergy
Doomwake Giant
12%inclusion24 decks200 decks
6%synergy
Pollywog Prodigy
12%inclusion24 decks200 decks
8%synergy
Victor, Valgavoth's Seneschal
11%inclusion22 decks200 decks
9%synergy
Heliod, the Radiant Dawn
11%inclusion21 decks200 decks
7%synergy
Moon-Blessed Cleric
11%inclusion21 decks200 decks
6%synergy
Ghostly Dancers
10%inclusion20 decks200 decks
7%synergy
Snapcaster Mage
10%inclusion19 decks200 decks
8%synergy
Laboratory Maniac
9.0%inclusion18 decks200 decks
6%synergy
Hoarding Broodlord
8.5%inclusion17 decks200 decks
7%synergy
Emet-Selch of the Third Seat
8.4%inclusion7 decks83 decks
-2%synergy
Enduring Curiosity
8.0%inclusion16 decks200 decks
1%synergy
Balemurk Leech
7.5%inclusion15 decks200 decks
7%synergy
Dauthi Voidwalker
7.5%inclusion15 decks200 decks
1%synergy
Gremlin Tamer
7.0%inclusion14 decks200 decks
6%synergy
Instants
Flusterstorm
56%inclusion112 decks200 decks
48%synergy
An Offer You Can't Refuse
51%inclusion102 decks200 decks
25%synergy
Mindbreak Trap
50%inclusion100 decks200 decks
43%synergy
Fierce Guardianship
50%inclusion100 decks200 decks
29%synergy
Mental Misstep
50%inclusion99 decks200 decks
42%synergy
Mystical Tutor
50%inclusion99 decks200 decks
38%synergy
Pact of Negation
49%inclusion98 decks200 decks
41%synergy
Intuition
48%inclusion95 decks200 decks
46%synergy
Borne Upon a Wind
48%inclusion95 decks200 decks
43%synergy
Cyclonic Rift
46%inclusion91 decks200 decks
21%synergy
Cabal Ritual
45%inclusion89 decks200 decks
41%synergy
Sink into Stupor
30%inclusion60 decks200 decks
18%synergy
Mana Drain
28%inclusion57 decks200 decks
11%synergy
Gifts Ungiven
27%inclusion54 decks200 decks
25%synergy
Into the Flood Maw
27%inclusion54 decks200 decks
23%synergy
Chain of Vapor
27%inclusion53 decks200 decks
23%synergy
Counterspell
21%inclusion42 decks200 decks
-20%synergy
Path to Exile
19%inclusion37 decks200 decks
-23%synergy
Dovin's Veto
17%inclusion34 decks200 decks
-8%synergy
Retraction Helix
16%inclusion31 decks200 decks
15%synergy
Brain Freeze
14%inclusion28 decks200 decks
13%synergy
Culling the Weak
14%inclusion27 decks200 decks
12%synergy
Ad Nauseam
12%inclusion23 decks200 decks
9%synergy
Arcane Denial
12%inclusion23 decks200 decks
-9%synergy
Frantic Search
10%inclusion20 decks200 decks
-7%synergy
Brainstorm
10%inclusion19 decks200 decks
-8%synergy
Deadly Rollick
9.0%inclusion18 decks200 decks
-5%synergy
Banishing Knack
9.0%inclusion18 decks200 decks
9%synergy
Dispel
9.0%inclusion18 decks200 decks
5%synergy
Muddle the Mixture
8.5%inclusion17 decks200 decks
4%synergy
Darkblast
8.5%inclusion17 decks200 decks
8%synergy
Strix Serenade
8.5%inclusion17 decks200 decks
5%synergy
Sacrifice
8.0%inclusion16 decks200 decks
7%synergy
Saw in Half
7.5%inclusion15 decks200 decks
5%synergy
Void Rend
7.5%inclusion15 decks200 decks
-26%synergy
Teferi's Protection
6.5%inclusion13 decks200 decks
-11%synergy
Negate
6.5%inclusion13 decks200 decks
-10%synergy
Fell the Profane
6.0%inclusion12 decks200 decks
-3%synergy
Thirst for Meaning
6.0%inclusion12 decks200 decks
4%synergy
Lim-Dûl's Vault
6.0%inclusion12 decks200 decks
2%synergy
Angel's Grace
5.0%inclusion10 decks200 decks
2%synergy
Dramatic Reversal
5.0%inclusion10 decks200 decks
3%synergy
Waterlogged Teachings
5.0%inclusion10 decks200 decks
1%synergy
Sorceries
Imperial Seal
48%inclusion95 decks200 decks
40%synergy
Reanimate
35%inclusion70 decks200 decks
19%synergy
Toxic Deluge
34%inclusion68 decks200 decks
15%synergy
Windfall
28%inclusion57 decks200 decks
15%synergy
Lively Dirge
22%inclusion43 decks200 decks
20%synergy
Beseech the Mirror
18%inclusion35 decks200 decks
13%synergy
Demonic Counsel
17%inclusion34 decks200 decks
16%synergy
Unmarked Grave
13%inclusion26 decks200 decks
12%synergy
Mnemonic Betrayal
12%inclusion24 decks200 decks
9%synergy
Singularity Rupture
11%inclusion7 decks64 decks
9%synergy
Yawgmoth's Will
8.5%inclusion17 decks200 decks
7%synergy
Cabal Therapy
8.0%inclusion16 decks200 decks
8%synergy
Diabolic Intent
8.0%inclusion16 decks200 decks
3%synergy
Redress Fate
8.0%inclusion16 decks200 decks
2%synergy
Buried Alive
7.5%inclusion15 decks200 decks
3%synergy
Damn
7.5%inclusion15 decks200 decks
-13%synergy
Dance of the Manse
7.0%inclusion14 decks200 decks
3%synergy
Supreme Verdict
6.5%inclusion13 decks200 decks
-8%synergy
Idyllic Tutor
6.5%inclusion13 decks200 decks
2%synergy
Grim Tutor
6.5%inclusion13 decks200 decks
2%synergy
Praetor's Grasp
6.5%inclusion13 decks200 decks
4%synergy
Gitaxian Probe
5.0%inclusion10 decks200 decks
3%synergy
Utility Artifacts
The One Ring
53%inclusion106 decks200 decks
39%synergy
Wishclaw Talisman
48%inclusion95 decks200 decks
39%synergy
Mesmeric Orb
10%inclusion20 decks200 decks
9%synergy
Sensei's Divining Top
7.0%inclusion14 decks200 decks
-3%synergy
Cursed Totem
7.0%inclusion14 decks200 decks
5%synergy
Agatha's Soul Cauldron
5.5%inclusion11 decks200 decks
5%synergy
Isochron Scepter
5.5%inclusion11 decks200 decks
3%synergy
Enchantments
Necropotence
52%inclusion104 decks200 decks
45%synergy
Tinybones Joins Up
48%inclusion95 decks200 decks
46%synergy
Touch the Spirit Realm
42%inclusion84 decks200 decks
39%synergy
Amphibian Downpour
41%inclusion82 decks200 decks
36%synergy
Mirrormade
40%inclusion79 decks200 decks
30%synergy
The Meathook Massacre
28%inclusion55 decks200 decks
24%synergy
Static Prison
27%inclusion53 decks200 decks
26%synergy
Copy Artifact
24%inclusion47 decks200 decks
22%synergy
Propaganda
20%inclusion39 decks200 decks
-7%synergy
Seal of Cleansing
18%inclusion36 decks200 decks
16%synergy
Sphere of Safety
17%inclusion34 decks200 decks
8%synergy
Grasp of Fate
17%inclusion33 decks200 decks
10%synergy
Chthonian Nightmare
15%inclusion30 decks200 decks
14%synergy
Ghostly Prison
15%inclusion30 decks200 decks
-6%synergy
Steal Enchantment
14%inclusion29 decks200 decks
14%synergy
Founding the Third Path
14%inclusion28 decks200 decks
14%synergy
Counterbalance
14%inclusion28 decks200 decks
12%synergy
Stillness in Motion
14%inclusion15 decks108 decks
13%synergy
Estrid's Invocation
14%inclusion27 decks200 decks
9%synergy
Secret Arcade // Dusty Parlor
14%inclusion27 decks200 decks
8%synergy
Trouble in Pairs
14%inclusion27 decks200 decks
8%synergy
Copy Enchantment
13%inclusion26 decks200 decks
8%synergy
Monologue Tax
13%inclusion25 decks200 decks
6%synergy
Cemetery Tampering
12%inclusion23 decks200 decks
11%synergy
Leyline of Anticipation
12%inclusion23 decks200 decks
7%synergy
Seal of Removal
12%inclusion23 decks200 decks
11%synergy
Teval's Judgment
11%inclusion12 decks112 decks
10%synergy
Out of the Tombs
10%inclusion19 decks200 decks
9%synergy
Starfield of Nyx
9.0%inclusion18 decks200 decks
5%synergy
Enchanted Evening
9.0%inclusion18 decks200 decks
7%synergy
Aura of Silence
9.0%inclusion18 decks200 decks
6%synergy
Darksteel Mutation
8.5%inclusion17 decks200 decks
2%synergy
The Tale of Tamiyo
8.5%inclusion17 decks200 decks
8%synergy
Black Market Connections
8.5%inclusion17 decks200 decks
-5%synergy
Sigil of the Empty Throne
8.0%inclusion16 decks200 decks
2%synergy
Chains of Mephistopheles
8.0%inclusion16 decks200 decks
8%synergy
Phyrexian Arena
7.5%inclusion15 decks200 decks
-7%synergy
Greater Auramancy
7.0%inclusion14 decks200 decks
2%synergy
Cacophony Unleashed
6.5%inclusion13 decks200 decks
5%synergy
Court of Cunning
6.5%inclusion13 decks200 decks
5%synergy
Imprisoned in the Moon
6.5%inclusion13 decks200 decks
0%synergy
Authority of the Consuls
6.0%inclusion12 decks200 decks
-5%synergy
Dance of Many
6.0%inclusion12 decks200 decks
6%synergy
Timely Ward
6.0%inclusion12 decks200 decks
1%synergy
All That Glitters
6.0%inclusion12 decks200 decks
-3%synergy
Nowhere to Run
6.0%inclusion12 decks200 decks
5%synergy
Exquisite Blood
5.5%inclusion11 decks200 decks
-1%synergy
Sheltered by Ghosts
5.5%inclusion11 decks200 decks
3%synergy
Solitary Confinement
5.0%inclusion10 decks200 decks
3%synergy
Out of Time
5.0%inclusion10 decks200 decks
4%synergy
Planeswalkers
Teferi, Time Raveler
40%inclusion80 decks200 decks
32%synergy
Utility Lands
Otawara, Soaring City
66%inclusion131 decks200 decks
46%synergy
Urza's Saga
31%inclusion61 decks200 decks
19%synergy
Hall of Heliod's Generosity
30%inclusion60 decks200 decks
17%synergy
Emergence Zone
23%inclusion46 decks200 decks
21%synergy
Cephalid Coliseum
21%inclusion41 decks200 decks
17%synergy
Minamo, School at Water's Edge
18%inclusion35 decks200 decks
13%synergy
Takenuma, Abandoned Mire
17%inclusion33 decks200 decks
10%synergy
Bojuka Bog
14%inclusion28 decks200 decks
-13%synergy
Urborg, Tomb of Yawgmoth
10%inclusion19 decks200 decks
-4%synergy
Serra's Sanctum
9.0%inclusion18 decks200 decks
7%synergy
City of Traitors
6.5%inclusion13 decks200 decks
5%synergy
Mistrise Village
5.3%inclusion6 decks113 decks
1%synergy
Phyrexian Tower
5.0%inclusion10 decks200 decks
1%synergy
Reliquary Tower
5.0%inclusion10 decks200 decks
-29%synergy
Mana Artifacts
Sol Ring
96%inclusion192 decks200 decks
6%synergy
Arcane Signet
95%inclusion190 decks200 decks
7%synergy
Talisman of Dominance
76%inclusion152 decks200 decks
27%synergy
Fellwar Stone
62%inclusion123 decks200 decks
27%synergy
Lotus Petal
61%inclusion121 decks200 decks
50%synergy
Talisman of Progress
57%inclusion115 decks200 decks
15%synergy
Mox Diamond
51%inclusion101 decks200 decks
43%synergy
Mox Opal
48%inclusion96 decks200 decks
39%synergy
Talisman of Hierarchy
43%inclusion85 decks200 decks
0%synergy
Lion's Eye Diamond
40%inclusion80 decks200 decks
38%synergy
Mox Amber
27%inclusion54 decks200 decks
21%synergy
Grim Monolith
25%inclusion49 decks200 decks
21%synergy
Orzhov Signet
14%inclusion29 decks200 decks
-21%synergy
Azorius Signet
14%inclusion27 decks200 decks
-19%synergy
Dimir Signet
13%inclusion25 decks200 decks
-20%synergy
Mind Stone
7.0%inclusion14 decks200 decks
-6%synergy
Commander's Sphere
5.0%inclusion10 decks200 decks
-15%synergy
Lands
Command Tower
97%inclusion194 decks200 decks
5%synergy
Hallowed Fountain
82%inclusion164 decks200 decks
33%synergy
Flooded Strand
82%inclusion163 decks200 decks
44%synergy
Watery Grave
81%inclusion162 decks200 decks
32%synergy
Godless Shrine
81%inclusion162 decks200 decks
31%synergy
Polluted Delta
81%inclusion161 decks200 decks
43%synergy
Marsh Flats
74%inclusion148 decks200 decks
38%synergy
Island
68%inclusion135 decks200 decks
-25%synergy
Exotic Orchard
65%inclusion129 decks200 decks
6%synergy
Swamp
64%inclusion127 decks200 decks
-28%synergy
City of Brass
60%inclusion119 decks200 decks
44%synergy
Mana Confluence
58%inclusion116 decks200 decks
44%synergy
Tundra
56%inclusion112 decks200 decks
40%synergy
Underground Sea
56%inclusion111 decks200 decks
40%synergy
Plains
55%inclusion110 decks200 decks
-36%synergy
Scrubland
55%inclusion110 decks200 decks
39%synergy
Morphic Pool
55%inclusion110 decks200 decks
21%synergy
Bloodstained Mire
55%inclusion109 decks200 decks
43%synergy
Gemstone Caverns
55%inclusion109 decks200 decks
47%synergy
Misty Rainforest
50%inclusion100 decks200 decks
39%synergy
Undercity Sewers
50%inclusion99 decks200 decks
35%synergy
Scalding Tarn
49%inclusion98 decks200 decks
38%synergy
Sea of Clouds
49%inclusion98 decks200 decks
13%synergy
Verdant Catacombs
49%inclusion98 decks200 decks
39%synergy
Windswept Heath
46%inclusion91 decks200 decks
36%synergy
Vault of Champions
43%inclusion86 decks200 decks
10%synergy
Arid Mesa
39%inclusion77 decks200 decks
28%synergy
Underground River
31%inclusion61 decks200 decks
-2%synergy
Sink into Stupor
30%inclusion60 decks200 decks
18%synergy
Adarkar Wastes
28%inclusion57 decks200 decks
-2%synergy
Caves of Koilos
27%inclusion53 decks200 decks
-9%synergy
Meticulous Archive
26%inclusion52 decks200 decks
12%synergy
Raffine's Tower
24%inclusion48 decks200 decks
-17%synergy
Arcane Sanctum
24%inclusion47 decks200 decks
-31%synergy
Shadowy Backstreet
23%inclusion46 decks200 decks
11%synergy
Glacial Fortress
20%inclusion40 decks200 decks
-19%synergy
Isolated Chapel
16%inclusion31 decks200 decks
-22%synergy
Drowned Catacomb
14%inclusion29 decks200 decks
-20%synergy
Gloomlake Verge
14%inclusion27 decks200 decks
2%synergy
Contaminated Landscape
13%inclusion26 decks200 decks
-2%synergy
Floodfarm Verge
13%inclusion25 decks200 decks
1%synergy
Starting Town
12%inclusion10 decks83 decks
8%synergy
Prairie Stream
12%inclusion24 decks200 decks
-29%synergy
Forbidden Orchard
12%inclusion23 decks200 decks
9%synergy
Reflecting Pool
11%inclusion22 decks200 decks
3%synergy
Spire of Industry
11%inclusion22 decks200 decks
2%synergy
Sunken Hollow
11%inclusion22 decks200 decks
-29%synergy
Terramorphic Expanse
11%inclusion21 decks200 decks
-7%synergy
Valgavoth's Lair
11%inclusion21 decks200 decks
8%synergy
Tainted Field
11%inclusion21 decks200 decks
3%synergy
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