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
12%inclusion5 decks42 decks
11%synergy
Does Machines
2.5%inclusion1 decks40 decks
2%synergy
Weather Maker
2.5%inclusion1 decks40 decks
2%synergy
Emptiness
1.5%inclusion1 decks67 decks
1%synergy
High Synergy Cards
Animate Dead
91%inclusion202 decks223 decks
81%synergy
Necromancy
81%inclusion180 decks223 decks
76%synergy
Dress Down
73%inclusion163 decks223 decks
71%synergy
Abdel Adrian, Gorion's Ward
72%inclusion161 decks223 decks
71%synergy
Entomb
74%inclusion164 decks223 decks
67%synergy
Mystic Remora
84%inclusion188 decks223 decks
63%synergy
Dance of the Dead
65%inclusion144 decks223 decks
62%synergy
Sevinne's Reclamation
68%inclusion152 decks223 decks
59%synergy
Ripples of Undeath
54%inclusion120 decks223 decks
51%synergy
Dark Ritual
70%inclusion155 decks223 decks
50%synergy
Top Cards
Esper Sentinel
69%inclusion154 decks223 decks
42%synergy
Swords to Plowshares
65%inclusion145 decks223 decks
-3%synergy
Swan Song
64%inclusion143 decks223 decks
44%synergy
Silence
59%inclusion132 decks223 decks
49%synergy
Blind Obedience
58%inclusion129 decks223 decks
46%synergy
Grand Abolisher
57%inclusion127 decks223 decks
42%synergy
Demonic Consultation
56%inclusion124 decks223 decks
48%synergy
Force of Negation
55%inclusion122 decks223 decks
43%synergy
Orcish Bowmasters
54%inclusion121 decks223 decks
44%synergy
Lotho, Corrupt Shirriff
53%inclusion119 decks223 decks
37%synergy
Game Changers
Rhystic Study
75%inclusion168 decks223 decks
44%synergy
Smothering Tithe
74%inclusion164 decks223 decks
42%synergy
Enlightened Tutor
70%inclusion157 decks223 decks
51%synergy
Demonic Tutor
69%inclusion153 decks223 decks
48%synergy
Vampiric Tutor
65%inclusion146 decks223 decks
48%synergy
Thassa's Oracle
65%inclusion145 decks223 decks
56%synergy
Ancient Tomb
60%inclusion133 decks223 decks
47%synergy
Force of Will
60%inclusion133 decks223 decks
47%synergy
Mana Vault
59%inclusion131 decks223 decks
50%synergy
Chrome Mox
57%inclusion127 decks223 decks
48%synergy
Creatures
Valley Floodcaller
51%inclusion113 decks223 decks
47%synergy
Ranger-Captain of Eos
48%inclusion107 decks223 decks
42%synergy
Displacer Kitten
40%inclusion90 decks223 decks
33%synergy
Hullbreaker Horror
37%inclusion83 decks223 decks
31%synergy
Wan Shi Tong, Librarian
34%inclusion20 decks59 decks
29%synergy
Mockingbird
33%inclusion74 decks223 decks
29%synergy
Voice of Victory
33%inclusion46 decks139 decks
25%synergy
Opposition Agent
32%inclusion72 decks223 decks
24%synergy
Archivist of Oghma
29%inclusion65 decks223 decks
23%synergy
Entity Tracker
29%inclusion64 decks223 decks
22%synergy
Inquisitive Glimmer
26%inclusion59 decks223 decks
19%synergy
Lurrus of the Dream-Den
26%inclusion57 decks223 decks
24%synergy
Ledger Shredder
24%inclusion53 decks223 decks
15%synergy
Drannith Magistrate
24%inclusion53 decks223 decks
16%synergy
Auriok Salvagers
24%inclusion53 decks223 decks
23%synergy
Scrabbling Skullcrab
22%inclusion50 decks223 decks
21%synergy
Mesa Enchantress
22%inclusion49 decks223 decks
13%synergy
Grim Guardian
21%inclusion47 decks223 decks
19%synergy
Gravebreaker Lamia
21%inclusion46 decks223 decks
20%synergy
Hedron Crab
20%inclusion45 decks223 decks
20%synergy
Demon of Fate's Design
19%inclusion43 decks223 decks
14%synergy
Overlord of the Balemurk
19%inclusion42 decks223 decks
17%synergy
Phyrexian Metamorph
18%inclusion41 decks223 decks
10%synergy
Talion, the Kindly Lord
18%inclusion40 decks223 decks
10%synergy
Starfield Mystic
17%inclusion38 decks223 decks
10%synergy
Faerie Mastermind
17%inclusion37 decks223 decks
7%synergy
Fear of Sleep Paralysis
16%inclusion36 decks223 decks
11%synergy
Fear of Impostors
16%inclusion35 decks223 decks
14%synergy
Tataru Taru
15%inclusion17 decks111 decks
7%synergy
Overlord of the Floodpits
15%inclusion33 decks223 decks
11%synergy
Zur the Enchanter
14%inclusion32 decks223 decks
9%synergy
Psychic Frog
14%inclusion32 decks223 decks
7%synergy
Ondu Spiritdancer
14%inclusion31 decks223 decks
8%synergy
Leonin Relic-Warder
13%inclusion30 decks223 decks
13%synergy
Doomwake Giant
13%inclusion30 decks223 decks
8%synergy
Zur, Eternal Schemer
13%inclusion29 decks223 decks
10%synergy
Ghostly Pilferer
12%inclusion27 decks223 decks
5%synergy
Victor, Valgavoth's Seneschal
12%inclusion26 decks223 decks
10%synergy
Ghostly Dancers
12%inclusion26 decks223 decks
9%synergy
Moon-Blessed Cleric
11%inclusion24 decks223 decks
6%synergy
Laboratory Maniac
11%inclusion24 decks223 decks
8%synergy
Pollywog Prodigy
10%inclusion23 decks223 decks
6%synergy
Heliod, the Radiant Dawn
10%inclusion23 decks223 decks
7%synergy
Snapcaster Mage
8.5%inclusion19 decks223 decks
7%synergy
Gremlin Tamer
8.5%inclusion19 decks223 decks
8%synergy
Balemurk Leech
8.5%inclusion19 decks223 decks
8%synergy
Hoarding Broodlord
8.1%inclusion18 decks223 decks
6%synergy
Sage of Mysteries
8.1%inclusion18 decks223 decks
8%synergy
Enduring Curiosity
8.1%inclusion18 decks223 decks
0%synergy
Emet-Selch of the Third Seat
7.2%inclusion8 decks111 decks
-2%synergy
Instants
Tainted Pact
53%inclusion119 decks223 decks
46%synergy
Flusterstorm
53%inclusion118 decks223 decks
45%synergy
An Offer You Can't Refuse
48%inclusion107 decks223 decks
21%synergy
Fierce Guardianship
48%inclusion106 decks223 decks
27%synergy
Mental Misstep
47%inclusion105 decks223 decks
40%synergy
Mystical Tutor
47%inclusion105 decks223 decks
36%synergy
Mindbreak Trap
47%inclusion104 decks223 decks
40%synergy
Borne Upon a Wind
46%inclusion103 decks223 decks
41%synergy
Intuition
46%inclusion102 decks223 decks
44%synergy
Pact of Negation
46%inclusion102 decks223 decks
38%synergy
Cyclonic Rift
42%inclusion94 decks223 decks
19%synergy
Cabal Ritual
42%inclusion93 decks223 decks
38%synergy
Sink into Stupor
29%inclusion65 decks223 decks
16%synergy
Gifts Ungiven
27%inclusion61 decks223 decks
25%synergy
Into the Flood Maw
27%inclusion60 decks223 decks
23%synergy
Mana Drain
26%inclusion58 decks223 decks
9%synergy
Chain of Vapor
25%inclusion56 decks223 decks
22%synergy
Counterspell
22%inclusion50 decks223 decks
-19%synergy
Path to Exile
20%inclusion45 decks223 decks
-22%synergy
Dovin's Veto
17%inclusion38 decks223 decks
-9%synergy
Retraction Helix
15%inclusion33 decks223 decks
14%synergy
Brain Freeze
14%inclusion32 decks223 decks
14%synergy
Arcane Denial
13%inclusion28 decks223 decks
-8%synergy
Culling the Weak
12%inclusion26 decks223 decks
10%synergy
Frantic Search
11%inclusion25 decks223 decks
-7%synergy
Ad Nauseam
11%inclusion25 decks223 decks
9%synergy
Darkblast
10%inclusion22 decks223 decks
10%synergy
Brainstorm
10%inclusion22 decks223 decks
-7%synergy
Deadly Rollick
9.0%inclusion20 decks223 decks
-6%synergy
Dispel
9.0%inclusion20 decks223 decks
6%synergy
Banishing Knack
8.5%inclusion19 decks223 decks
8%synergy
Void Rend
7.6%inclusion17 decks223 decks
-27%synergy
Strix Serenade
7.6%inclusion17 decks223 decks
4%synergy
Saw in Half
7.6%inclusion17 decks223 decks
6%synergy
Sacrifice
7.2%inclusion16 decks223 decks
7%synergy
Muddle the Mixture
7.2%inclusion16 decks223 decks
3%synergy
Lim-Dûl's Vault
7.2%inclusion16 decks223 decks
4%synergy
Fell the Profane
6.7%inclusion15 decks223 decks
-2%synergy
Negate
6.7%inclusion15 decks223 decks
-10%synergy
Teferi's Protection
6.3%inclusion14 decks223 decks
-10%synergy
Thirst for Meaning
6.3%inclusion14 decks223 decks
5%synergy
Orim's Chant
5.8%inclusion13 decks223 decks
4%synergy
Otherworldly Gaze
5.4%inclusion12 decks223 decks
3%synergy
Waterlogged Teachings
5.4%inclusion12 decks223 decks
1%synergy
Sorceries
Imperial Seal
46%inclusion102 decks223 decks
38%synergy
Reanimate
35%inclusion78 decks223 decks
19%synergy
Toxic Deluge
32%inclusion71 decks223 decks
12%synergy
Windfall
28%inclusion63 decks223 decks
15%synergy
Lively Dirge
22%inclusion49 decks223 decks
21%synergy
Beseech the Mirror
18%inclusion40 decks223 decks
14%synergy
Demonic Counsel
16%inclusion36 decks223 decks
15%synergy
Unmarked Grave
13%inclusion29 decks223 decks
12%synergy
Mnemonic Betrayal
12%inclusion27 decks223 decks
9%synergy
Singularity Rupture
11%inclusion10 decks93 decks
8%synergy
Redress Fate
9.0%inclusion20 decks223 decks
3%synergy
Diabolic Intent
8.5%inclusion19 decks223 decks
4%synergy
Buried Alive
8.1%inclusion18 decks223 decks
4%synergy
Cabal Therapy
7.6%inclusion17 decks223 decks
8%synergy
Idyllic Tutor
7.6%inclusion17 decks223 decks
3%synergy
Yawgmoth's Will
7.6%inclusion17 decks223 decks
6%synergy
Damn
6.7%inclusion15 decks223 decks
-14%synergy
Supreme Verdict
6.3%inclusion14 decks223 decks
-9%synergy
Dance of the Manse
6.3%inclusion14 decks223 decks
3%synergy
Glimpse the Unthinkable
5.8%inclusion13 decks223 decks
5%synergy
Grim Tutor
5.8%inclusion13 decks223 decks
2%synergy
Praetor's Grasp
5.8%inclusion13 decks223 decks
3%synergy
Space-Time Anomaly
5.5%inclusion5 decks91 decks
4%synergy
Utility Artifacts
The One Ring
49%inclusion109 decks223 decks
36%synergy
Wishclaw Talisman
44%inclusion98 decks223 decks
36%synergy
Mesmeric Orb
11%inclusion24 decks223 decks
10%synergy
Cursed Totem
6.7%inclusion15 decks223 decks
4%synergy
Sensei's Divining Top
6.3%inclusion14 decks223 decks
-3%synergy
Enchantments
Necropotence
50%inclusion112 decks223 decks
44%synergy
Tinybones Joins Up
46%inclusion103 decks223 decks
45%synergy
Amphibian Downpour
42%inclusion94 decks223 decks
38%synergy
Mirrormade
39%inclusion88 decks223 decks
30%synergy
Touch the Spirit Realm
38%inclusion85 decks223 decks
36%synergy
The Meathook Massacre
28%inclusion62 decks223 decks
24%synergy
Static Prison
27%inclusion60 decks223 decks
26%synergy
Copy Artifact
22%inclusion48 decks223 decks
20%synergy
Propaganda
21%inclusion46 decks223 decks
-7%synergy
Seal of Cleansing
20%inclusion45 decks223 decks
19%synergy
Grasp of Fate
19%inclusion42 decks223 decks
13%synergy
Sphere of Safety
19%inclusion42 decks223 decks
9%synergy
Secret Arcade // Dusty Parlor
16%inclusion36 decks223 decks
11%synergy
Chthonian Nightmare
15%inclusion34 decks223 decks
15%synergy
Ghostly Prison
15%inclusion34 decks223 decks
-7%synergy
Stillness in Motion
15%inclusion20 decks134 decks
15%synergy
Founding the Third Path
15%inclusion33 decks223 decks
15%synergy
Copy Enchantment
15%inclusion33 decks223 decks
10%synergy
Estrid's Invocation
13%inclusion30 decks223 decks
9%synergy
Counterbalance
13%inclusion29 decks223 decks
11%synergy
Monologue Tax
13%inclusion29 decks223 decks
7%synergy
Trouble in Pairs
13%inclusion29 decks223 decks
8%synergy
Steal Enchantment
13%inclusion28 decks223 decks
12%synergy
Cemetery Tampering
13%inclusion28 decks223 decks
12%synergy
Teval's Judgment
12%inclusion17 decks138 decks
12%synergy
Leyline of Anticipation
12%inclusion27 decks223 decks
8%synergy
Seal of Removal
12%inclusion26 decks223 decks
11%synergy
Out of the Tombs
10%inclusion23 decks223 decks
10%synergy
Starfield of Nyx
10%inclusion22 decks223 decks
6%synergy
The Tale of Tamiyo
9.4%inclusion21 decks223 decks
9%synergy
Enchanted Evening
9.0%inclusion20 decks223 decks
7%synergy
Sigil of the Empty Throne
8.5%inclusion19 decks223 decks
3%synergy
Darksteel Mutation
8.1%inclusion18 decks223 decks
2%synergy
Greater Auramancy
8.1%inclusion18 decks223 decks
4%synergy
Aura of Silence
8.1%inclusion18 decks223 decks
5%synergy
Phyrexian Arena
8.1%inclusion18 decks223 decks
-6%synergy
Court of Cunning
7.6%inclusion17 decks223 decks
7%synergy
Imprisoned in the Moon
7.6%inclusion17 decks223 decks
1%synergy
Black Market Connections
7.6%inclusion17 decks223 decks
-7%synergy
Chains of Mephistopheles
7.6%inclusion17 decks223 decks
7%synergy
Cacophony Unleashed
7.2%inclusion16 decks223 decks
5%synergy
Nowhere to Run
7.2%inclusion16 decks223 decks
6%synergy
Authority of the Consuls
6.7%inclusion15 decks223 decks
-6%synergy
All That Glitters
6.7%inclusion15 decks223 decks
-2%synergy
Sheltered by Ghosts
6.3%inclusion14 decks223 decks
4%synergy
Timely Ward
6.3%inclusion14 decks223 decks
1%synergy
Dance of Many
5.8%inclusion13 decks223 decks
6%synergy
Out of Time
5.8%inclusion13 decks223 decks
5%synergy
Defiled Crypt // Cadaver Lab
5.4%inclusion12 decks222 decks
5%synergy
Restricted Office // Lecture Hall
5.4%inclusion12 decks223 decks
3%synergy
Planeswalkers
Teferi, Time Raveler
38%inclusion84 decks223 decks
29%synergy
Utility Lands
Otawara, Soaring City
62%inclusion139 decks223 decks
43%synergy
Hall of Heliod's Generosity
31%inclusion70 decks223 decks
18%synergy
Urza's Saga
30%inclusion68 decks223 decks
19%synergy
Emergence Zone
22%inclusion48 decks223 decks
19%synergy
Cephalid Coliseum
20%inclusion44 decks223 decks
16%synergy
Takenuma, Abandoned Mire
17%inclusion37 decks223 decks
10%synergy
Bojuka Bog
16%inclusion36 decks223 decks
-11%synergy
Minamo, School at Water's Edge
15%inclusion33 decks223 decks
11%synergy
Serra's Sanctum
10%inclusion22 decks223 decks
8%synergy
Urborg, Tomb of Yawgmoth
9.4%inclusion21 decks223 decks
-4%synergy
City of Traitors
7.2%inclusion16 decks223 decks
6%synergy
Phyrexian Tower
5.8%inclusion13 decks223 decks
2%synergy
Reliquary Tower
5.8%inclusion13 decks223 decks
-28%synergy
Mistrise Village
5.0%inclusion7 decks139 decks
2%synergy
Mana Artifacts
Sol Ring
96%inclusion215 decks223 decks
7%synergy
Arcane Signet
94%inclusion210 decks223 decks
6%synergy
Talisman of Dominance
74%inclusion165 decks223 decks
24%synergy
Fellwar Stone
59%inclusion131 decks223 decks
25%synergy
Lotus Petal
58%inclusion130 decks223 decks
48%synergy
Talisman of Progress
57%inclusion127 decks223 decks
13%synergy
Mox Diamond
48%inclusion108 decks223 decks
41%synergy
Mox Opal
45%inclusion101 decks223 decks
37%synergy
Talisman of Hierarchy
43%inclusion96 decks223 decks
-1%synergy
Lion's Eye Diamond
40%inclusion89 decks223 decks
38%synergy
Mox Amber
26%inclusion57 decks223 decks
19%synergy
Grim Monolith
22%inclusion48 decks223 decks
18%synergy
Orzhov Signet
14%inclusion32 decks223 decks
-19%synergy
Dimir Signet
13%inclusion29 decks223 decks
-18%synergy
Azorius Signet
13%inclusion29 decks223 decks
-18%synergy
Mind Stone
6.3%inclusion14 decks223 decks
-6%synergy
Lands
Command Tower
96%inclusion215 decks223 decks
4%synergy
Watery Grave
81%inclusion181 decks223 decks
31%synergy
Hallowed Fountain
81%inclusion180 decks223 decks
31%synergy
Flooded Strand
80%inclusion179 decks223 decks
42%synergy
Godless Shrine
80%inclusion178 decks223 decks
29%synergy
Polluted Delta
79%inclusion176 decks223 decks
41%synergy
Marsh Flats
74%inclusion165 decks223 decks
38%synergy
Island
68%inclusion151 decks223 decks
-25%synergy
Swamp
65%inclusion145 decks223 decks
-27%synergy
Exotic Orchard
64%inclusion142 decks223 decks
5%synergy
City of Brass
58%inclusion129 decks223 decks
43%synergy
Plains
57%inclusion128 decks223 decks
-34%synergy
Tundra
56%inclusion124 decks223 decks
40%synergy
Underground Sea
55%inclusion123 decks223 decks
39%synergy
Mana Confluence
55%inclusion123 decks223 decks
41%synergy
Scrubland
55%inclusion122 decks223 decks
39%synergy
Morphic Pool
53%inclusion119 decks223 decks
19%synergy
Gemstone Caverns
52%inclusion116 decks223 decks
44%synergy
Bloodstained Mire
52%inclusion116 decks223 decks
41%synergy
Undercity Sewers
48%inclusion108 decks223 decks
34%synergy
Misty Rainforest
48%inclusion106 decks223 decks
37%synergy
Sea of Clouds
48%inclusion106 decks223 decks
12%synergy
Verdant Catacombs
47%inclusion105 decks223 decks
37%synergy
Scalding Tarn
47%inclusion105 decks223 decks
36%synergy
Windswept Heath
43%inclusion97 decks223 decks
34%synergy
Vault of Champions
43%inclusion97 decks223 decks
11%synergy
Arid Mesa
39%inclusion86 decks223 decks
29%synergy
Underground River
31%inclusion70 decks223 decks
-2%synergy
Sink into Stupor
29%inclusion65 decks223 decks
16%synergy
Adarkar Wastes
29%inclusion64 decks223 decks
-3%synergy
Caves of Koilos
28%inclusion63 decks223 decks
-7%synergy
Meticulous Archive
27%inclusion60 decks223 decks
13%synergy
Raffine's Tower
26%inclusion57 decks223 decks
-15%synergy
Arcane Sanctum
25%inclusion55 decks223 decks
-30%synergy
Shadowy Backstreet
22%inclusion50 decks223 decks
10%synergy
Glacial Fortress
21%inclusion46 decks223 decks
-21%synergy
Isolated Chapel
17%inclusion38 decks223 decks
-23%synergy
Drowned Catacomb
16%inclusion35 decks223 decks
-21%synergy
Starting Town
14%inclusion16 decks111 decks
10%synergy
Gloomlake Verge
14%inclusion32 decks223 decks
3%synergy
Floodfarm Verge
13%inclusion30 decks223 decks
2%synergy
Contaminated Landscape
12%inclusion27 decks223 decks
-2%synergy
Prairie Stream
12%inclusion27 decks223 decks
-29%synergy
Valgavoth's Lair
12%inclusion26 decks223 decks
9%synergy
Terramorphic Expanse
11%inclusion25 decks223 decks
-5%synergy
Shipwreck Marsh
11%inclusion25 decks223 decks
-9%synergy
Sunken Hollow
11%inclusion25 decks223 decks
-28%synergy
Forbidden Orchard
11%inclusion24 decks223 decks
8%synergy
Cavern of Souls
10%inclusion23 decks223 decks
4%synergy
Tainted Field
10%inclusion23 decks223 decks
3%synergy
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