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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Enchantments
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Utility Lands
Mana Artifacts
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Eiganjo Dynastorian
8.3%inclusion1 decks12 decks
8%synergy
Turbulent Moor
8.3%inclusion1 decks12 decks
8%synergy
Changing Loyalty
8.3%inclusion1 decks12 decks
8%synergy
Does Machines
6.3%inclusion3 decks48 decks
6%synergy
Weather Maker
2.1%inclusion1 decks48 decks
2%synergy
High Synergy Cards
Animate Dead
91%inclusion206 decks227 decks
81%synergy
Necromancy
81%inclusion184 decks227 decks
77%synergy
Abdel Adrian, Gorion's Ward
72%inclusion164 decks227 decks
71%synergy
Dress Down
72%inclusion163 decks227 decks
69%synergy
Entomb
74%inclusion167 decks227 decks
67%synergy
Mystic Remora
84%inclusion190 decks227 decks
63%synergy
Dance of the Dead
65%inclusion147 decks227 decks
63%synergy
Sevinne's Reclamation
68%inclusion154 decks227 decks
59%synergy
Ripples of Undeath
55%inclusion124 decks227 decks
52%synergy
Dark Ritual
69%inclusion156 decks227 decks
49%synergy
Top Cards
Esper Sentinel
68%inclusion155 decks227 decks
41%synergy
Swords to Plowshares
64%inclusion146 decks227 decks
-4%synergy
Swan Song
64%inclusion145 decks227 decks
44%synergy
Silence
58%inclusion132 decks227 decks
48%synergy
Blind Obedience
57%inclusion129 decks227 decks
45%synergy
Grand Abolisher
56%inclusion128 decks227 decks
42%synergy
Demonic Consultation
56%inclusion126 decks227 decks
48%synergy
Force of Negation
54%inclusion123 decks227 decks
42%synergy
Orcish Bowmasters
54%inclusion123 decks227 decks
44%synergy
Tainted Pact
53%inclusion121 decks227 decks
46%synergy
Game Changers
Rhystic Study
74%inclusion169 decks227 decks
43%synergy
Smothering Tithe
72%inclusion164 decks227 decks
41%synergy
Enlightened Tutor
70%inclusion159 decks227 decks
51%synergy
Demonic Tutor
68%inclusion155 decks227 decks
48%synergy
Vampiric Tutor
65%inclusion148 decks227 decks
48%synergy
Thassa's Oracle
65%inclusion147 decks227 decks
56%synergy
Ancient Tomb
60%inclusion136 decks227 decks
47%synergy
Force of Will
59%inclusion135 decks227 decks
47%synergy
Mana Vault
59%inclusion134 decks227 decks
50%synergy
Chrome Mox
57%inclusion129 decks227 decks
48%synergy
Creatures
Lotho, Corrupt Shirriff
53%inclusion120 decks227 decks
36%synergy
Valley Floodcaller
49%inclusion112 decks227 decks
45%synergy
Ranger-Captain of Eos
48%inclusion108 decks227 decks
41%synergy
Displacer Kitten
39%inclusion89 decks227 decks
32%synergy
Hullbreaker Horror
37%inclusion84 decks227 decks
31%synergy
Voice of Victory
33%inclusion47 decks143 decks
25%synergy
Opposition Agent
33%inclusion74 decks227 decks
24%synergy
Wan Shi Tong, Librarian
32%inclusion21 decks65 decks
27%synergy
Mockingbird
32%inclusion73 decks227 decks
28%synergy
Archivist of Oghma
28%inclusion64 decks227 decks
22%synergy
Entity Tracker
28%inclusion64 decks227 decks
22%synergy
Inquisitive Glimmer
26%inclusion60 decks227 decks
19%synergy
Lurrus of the Dream-Den
26%inclusion59 decks227 decks
24%synergy
Ledger Shredder
24%inclusion55 decks227 decks
16%synergy
Auriok Salvagers
24%inclusion54 decks227 decks
23%synergy
Scrabbling Skullcrab
23%inclusion53 decks227 decks
22%synergy
Drannith Magistrate
23%inclusion53 decks227 decks
16%synergy
Mesa Enchantress
23%inclusion52 decks227 decks
14%synergy
Gravebreaker Lamia
22%inclusion49 decks227 decks
21%synergy
Hedron Crab
20%inclusion46 decks227 decks
20%synergy
Grim Guardian
20%inclusion46 decks227 decks
18%synergy
Demon of Fate's Design
19%inclusion44 decks227 decks
14%synergy
Overlord of the Balemurk
19%inclusion43 decks227 decks
17%synergy
Phyrexian Metamorph
19%inclusion42 decks227 decks
10%synergy
Starfield Mystic
18%inclusion40 decks227 decks
11%synergy
Talion, the Kindly Lord
17%inclusion39 decks227 decks
9%synergy
Fear of Impostors
16%inclusion37 decks227 decks
15%synergy
Faerie Mastermind
16%inclusion37 decks227 decks
7%synergy
Fear of Sleep Paralysis
16%inclusion36 decks227 decks
11%synergy
Tataru Taru
16%inclusion18 decks116 decks
7%synergy
Overlord of the Floodpits
15%inclusion35 decks227 decks
12%synergy
Zur the Enchanter
15%inclusion33 decks227 decks
9%synergy
Doomwake Giant
14%inclusion32 decks227 decks
8%synergy
Ondu Spiritdancer
14%inclusion32 decks227 decks
8%synergy
Psychic Frog
14%inclusion32 decks227 decks
7%synergy
Leonin Relic-Warder
13%inclusion30 decks227 decks
13%synergy
Zur, Eternal Schemer
13%inclusion30 decks227 decks
10%synergy
Ghostly Pilferer
13%inclusion29 decks227 decks
5%synergy
Ghostly Dancers
12%inclusion27 decks227 decks
9%synergy
Victor, Valgavoth's Seneschal
11%inclusion26 decks227 decks
10%synergy
Moon-Blessed Cleric
11%inclusion24 decks227 decks
6%synergy
Pollywog Prodigy
11%inclusion24 decks227 decks
7%synergy
Heliod, the Radiant Dawn
11%inclusion24 decks227 decks
7%synergy
Laboratory Maniac
10%inclusion23 decks227 decks
7%synergy
Enduring Curiosity
8.8%inclusion20 decks227 decks
1%synergy
Snapcaster Mage
8.4%inclusion19 decks227 decks
6%synergy
Hoarding Broodlord
7.9%inclusion18 decks227 decks
6%synergy
Sage of Mysteries
7.9%inclusion18 decks227 decks
8%synergy
Gremlin Tamer
7.9%inclusion18 decks227 decks
7%synergy
Balemurk Leech
7.9%inclusion18 decks227 decks
7%synergy
Instants
Flusterstorm
53%inclusion120 decks227 decks
45%synergy
An Offer You Can't Refuse
48%inclusion108 decks227 decks
20%synergy
Mystical Tutor
48%inclusion108 decks227 decks
37%synergy
Mental Misstep
47%inclusion106 decks227 decks
40%synergy
Fierce Guardianship
47%inclusion106 decks227 decks
26%synergy
Intuition
46%inclusion105 decks227 decks
45%synergy
Mindbreak Trap
46%inclusion105 decks227 decks
40%synergy
Pact of Negation
46%inclusion105 decks227 decks
39%synergy
Borne Upon a Wind
45%inclusion103 decks227 decks
41%synergy
Cyclonic Rift
42%inclusion96 decks227 decks
19%synergy
Cabal Ritual
42%inclusion95 decks227 decks
38%synergy
Sink into Stupor
30%inclusion67 decks227 decks
17%synergy
Gifts Ungiven
26%inclusion60 decks227 decks
24%synergy
Chain of Vapor
26%inclusion59 decks227 decks
23%synergy
Mana Drain
26%inclusion59 decks227 decks
9%synergy
Into the Flood Maw
26%inclusion59 decks227 decks
22%synergy
Counterspell
22%inclusion51 decks227 decks
-19%synergy
Path to Exile
20%inclusion46 decks227 decks
-22%synergy
Dovin's Veto
17%inclusion38 decks227 decks
-9%synergy
Retraction Helix
15%inclusion33 decks227 decks
14%synergy
Brain Freeze
15%inclusion33 decks227 decks
14%synergy
Arcane Denial
12%inclusion28 decks227 decks
-8%synergy
Culling the Weak
12%inclusion27 decks227 decks
10%synergy
Ad Nauseam
11%inclusion25 decks227 decks
9%synergy
Frantic Search
11%inclusion24 decks227 decks
-7%synergy
Brainstorm
9.3%inclusion21 decks227 decks
-8%synergy
Deadly Rollick
8.8%inclusion20 decks227 decks
-6%synergy
Darkblast
8.8%inclusion20 decks227 decks
9%synergy
Dispel
8.8%inclusion20 decks227 decks
5%synergy
Banishing Knack
8.4%inclusion19 decks227 decks
8%synergy
Muddle the Mixture
7.5%inclusion17 decks227 decks
4%synergy
Void Rend
7.5%inclusion17 decks227 decks
-27%synergy
Strix Serenade
7.5%inclusion17 decks227 decks
4%synergy
Saw in Half
7.5%inclusion17 decks227 decks
5%synergy
Fell the Profane
7.0%inclusion16 decks227 decks
-2%synergy
Sacrifice
7.0%inclusion16 decks227 decks
6%synergy
Thirst for Meaning
6.6%inclusion15 decks227 decks
5%synergy
Teferi's Protection
6.2%inclusion14 decks227 decks
-10%synergy
Orim's Chant
6.2%inclusion14 decks227 decks
5%synergy
Lim-Dûl's Vault
6.2%inclusion14 decks227 decks
3%synergy
Negate
5.7%inclusion13 decks227 decks
-11%synergy
Otherworldly Gaze
5.3%inclusion12 decks227 decks
3%synergy
Sorceries
Imperial Seal
45%inclusion103 decks227 decks
38%synergy
Reanimate
35%inclusion80 decks227 decks
19%synergy
Toxic Deluge
33%inclusion74 decks227 decks
13%synergy
Windfall
27%inclusion62 decks227 decks
14%synergy
Lively Dirge
22%inclusion50 decks227 decks
21%synergy
Beseech the Mirror
19%inclusion43 decks227 decks
15%synergy
Demonic Counsel
15%inclusion35 decks227 decks
14%synergy
Unmarked Grave
13%inclusion29 decks227 decks
11%synergy
Mnemonic Betrayal
12%inclusion28 decks227 decks
9%synergy
Diabolic Intent
9.3%inclusion21 decks227 decks
4%synergy
Singularity Rupture
9.2%inclusion9 decks98 decks
7%synergy
Redress Fate
8.8%inclusion20 decks227 decks
3%synergy
Buried Alive
8.4%inclusion19 decks227 decks
4%synergy
Idyllic Tutor
7.9%inclusion18 decks227 decks
4%synergy
Cabal Therapy
7.5%inclusion17 decks227 decks
7%synergy
Yawgmoth's Will
7.5%inclusion17 decks227 decks
6%synergy
Damn
7.0%inclusion16 decks227 decks
-13%synergy
Supreme Verdict
6.6%inclusion15 decks227 decks
-8%synergy
Glimpse the Unthinkable
6.2%inclusion14 decks227 decks
6%synergy
Praetor's Grasp
6.2%inclusion14 decks227 decks
3%synergy
Dance of the Manse
6.2%inclusion14 decks227 decks
3%synergy
Grim Tutor
5.7%inclusion13 decks227 decks
2%synergy
Extinguish All Hope
5.3%inclusion12 decks227 decks
4%synergy
Space-Time Anomaly
5.2%inclusion5 decks96 decks
4%synergy
Utility Artifacts
The One Ring
48%inclusion108 decks227 decks
35%synergy
Wishclaw Talisman
43%inclusion97 decks227 decks
35%synergy
Mesmeric Orb
11%inclusion24 decks227 decks
9%synergy
Cursed Totem
6.6%inclusion15 decks227 decks
4%synergy
Sensei's Divining Top
6.2%inclusion14 decks227 decks
-3%synergy
Enchantments
Necropotence
50%inclusion113 decks227 decks
43%synergy
Tinybones Joins Up
46%inclusion105 decks227 decks
45%synergy
Amphibian Downpour
43%inclusion97 decks227 decks
38%synergy
Mirrormade
39%inclusion88 decks227 decks
29%synergy
Touch the Spirit Realm
38%inclusion87 decks227 decks
36%synergy
The Meathook Massacre
28%inclusion64 decks227 decks
25%synergy
Static Prison
26%inclusion60 decks227 decks
26%synergy
Propaganda
21%inclusion47 decks227 decks
-7%synergy
Copy Artifact
20%inclusion46 decks227 decks
19%synergy
Seal of Cleansing
20%inclusion46 decks227 decks
19%synergy
Grasp of Fate
19%inclusion44 decks227 decks
13%synergy
Sphere of Safety
19%inclusion43 decks227 decks
10%synergy
Secret Arcade // Dusty Parlor
16%inclusion36 decks227 decks
11%synergy
Chthonian Nightmare
15%inclusion35 decks227 decks
15%synergy
Ghostly Prison
15%inclusion35 decks227 decks
-7%synergy
Stillness in Motion
15%inclusion21 decks138 decks
15%synergy
Copy Enchantment
15%inclusion34 decks227 decks
10%synergy
Founding the Third Path
14%inclusion31 decks227 decks
13%synergy
Estrid's Invocation
13%inclusion30 decks227 decks
9%synergy
Monologue Tax
13%inclusion30 decks227 decks
7%synergy
Trouble in Pairs
13%inclusion30 decks227 decks
8%synergy
Counterbalance
12%inclusion28 decks227 decks
11%synergy
Cemetery Tampering
12%inclusion28 decks227 decks
12%synergy
Seal of Removal
12%inclusion28 decks227 decks
12%synergy
Teval's Judgment
12%inclusion17 decks142 decks
11%synergy
Steal Enchantment
12%inclusion27 decks227 decks
11%synergy
Leyline of Anticipation
12%inclusion27 decks227 decks
8%synergy
Out of the Tombs
11%inclusion24 decks227 decks
10%synergy
Starfield of Nyx
10%inclusion23 decks227 decks
6%synergy
The Tale of Tamiyo
10%inclusion22 decks227 decks
9%synergy
Sigil of the Empty Throne
8.8%inclusion20 decks227 decks
3%synergy
Enchanted Evening
8.8%inclusion20 decks227 decks
7%synergy
Noggle the Mind
8.0%inclusion4 decks50 decks
7%synergy
Darksteel Mutation
7.9%inclusion18 decks227 decks
2%synergy
Court of Cunning
7.9%inclusion18 decks227 decks
7%synergy
Imprisoned in the Moon
7.9%inclusion18 decks227 decks
1%synergy
Greater Auramancy
7.9%inclusion18 decks227 decks
4%synergy
Aura of Silence
7.9%inclusion18 decks227 decks
5%synergy
Phyrexian Arena
7.9%inclusion18 decks227 decks
-6%synergy
Black Market Connections
7.5%inclusion17 decks227 decks
-7%synergy
Chains of Mephistopheles
7.5%inclusion17 decks227 decks
7%synergy
Cacophony Unleashed
7.0%inclusion16 decks227 decks
5%synergy
Dance of Many
6.6%inclusion15 decks227 decks
6%synergy
Sheltered by Ghosts
6.6%inclusion15 decks227 decks
4%synergy
Nowhere to Run
6.6%inclusion15 decks227 decks
5%synergy
Authority of the Consuls
6.2%inclusion14 decks227 decks
-6%synergy
All That Glitters
6.2%inclusion14 decks227 decks
-3%synergy
Out of Time
5.7%inclusion13 decks227 decks
5%synergy
Timely Ward
5.7%inclusion13 decks227 decks
1%synergy
Defiled Crypt // Cadaver Lab
5.3%inclusion12 decks226 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
36%inclusion82 decks227 decks
28%synergy
Utility Lands
Otawara, Soaring City
63%inclusion143 decks227 decks
44%synergy
Hall of Heliod's Generosity
31%inclusion71 decks227 decks
18%synergy
Urza's Saga
31%inclusion71 decks227 decks
20%synergy
Emergence Zone
21%inclusion48 decks227 decks
19%synergy
Cephalid Coliseum
20%inclusion45 decks227 decks
16%synergy
Takenuma, Abandoned Mire
16%inclusion36 decks227 decks
9%synergy
Bojuka Bog
15%inclusion35 decks227 decks
-12%synergy
Minamo, School at Water's Edge
15%inclusion33 decks227 decks
11%synergy
Urborg, Tomb of Yawgmoth
10%inclusion23 decks227 decks
-3%synergy
Serra's Sanctum
10%inclusion22 decks227 decks
8%synergy
City of Traitors
7.5%inclusion17 decks227 decks
6%synergy
Phyrexian Tower
6.2%inclusion14 decks227 decks
3%synergy
Reliquary Tower
5.7%inclusion13 decks227 decks
-28%synergy
Mana Artifacts
Sol Ring
96%inclusion219 decks227 decks
7%synergy
Arcane Signet
93%inclusion212 decks227 decks
6%synergy
Talisman of Dominance
72%inclusion164 decks227 decks
23%synergy
Fellwar Stone
59%inclusion133 decks227 decks
25%synergy
Lotus Petal
58%inclusion132 decks227 decks
48%synergy
Talisman of Progress
56%inclusion126 decks227 decks
12%synergy
Mox Diamond
48%inclusion110 decks227 decks
42%synergy
Mox Opal
45%inclusion103 decks227 decks
37%synergy
Talisman of Hierarchy
41%inclusion94 decks227 decks
-3%synergy
Lion's Eye Diamond
40%inclusion90 decks227 decks
38%synergy
Mox Amber
26%inclusion59 decks227 decks
20%synergy
Grim Monolith
22%inclusion50 decks227 decks
19%synergy
Orzhov Signet
15%inclusion34 decks227 decks
-18%synergy
Azorius Signet
14%inclusion32 decks227 decks
-17%synergy
Dimir Signet
13%inclusion30 decks227 decks
-18%synergy
Mind Stone
6.6%inclusion15 decks227 decks
-6%synergy
Lands
Command Tower
96%inclusion219 decks227 decks
4%synergy
Watery Grave
82%inclusion186 decks227 decks
31%synergy
Hallowed Fountain
81%inclusion184 decks227 decks
31%synergy
Flooded Strand
81%inclusion183 decks227 decks
42%synergy
Godless Shrine
80%inclusion182 decks227 decks
29%synergy
Polluted Delta
79%inclusion180 decks227 decks
42%synergy
Marsh Flats
74%inclusion169 decks227 decks
38%synergy
Island
68%inclusion154 decks227 decks
-25%synergy
Swamp
65%inclusion148 decks227 decks
-26%synergy
Exotic Orchard
63%inclusion143 decks227 decks
4%synergy
City of Brass
58%inclusion132 decks227 decks
43%synergy
Plains
58%inclusion131 decks227 decks
-34%synergy
Tundra
56%inclusion127 decks227 decks
40%synergy
Underground Sea
56%inclusion126 decks227 decks
40%synergy
Mana Confluence
56%inclusion126 decks227 decks
42%synergy
Scrubland
55%inclusion125 decks227 decks
39%synergy
Morphic Pool
54%inclusion122 decks227 decks
20%synergy
Gemstone Caverns
52%inclusion118 decks227 decks
44%synergy
Bloodstained Mire
52%inclusion118 decks227 decks
41%synergy
Undercity Sewers
48%inclusion110 decks227 decks
34%synergy
Misty Rainforest
48%inclusion110 decks227 decks
38%synergy
Sea of Clouds
48%inclusion110 decks227 decks
13%synergy
Verdant Catacombs
48%inclusion108 decks227 decks
38%synergy
Scalding Tarn
48%inclusion108 decks227 decks
37%synergy
Vault of Champions
44%inclusion101 decks227 decks
12%synergy
Windswept Heath
44%inclusion99 decks227 decks
34%synergy
Arid Mesa
39%inclusion88 decks227 decks
29%synergy
Underground River
32%inclusion72 decks227 decks
-2%synergy
Sink into Stupor
30%inclusion67 decks227 decks
17%synergy
Caves of Koilos
29%inclusion65 decks227 decks
-7%synergy
Adarkar Wastes
29%inclusion65 decks227 decks
-3%synergy
Meticulous Archive
27%inclusion62 decks227 decks
13%synergy
Raffine's Tower
26%inclusion59 decks227 decks
-15%synergy
Arcane Sanctum
25%inclusion56 decks227 decks
-30%synergy
Shadowy Backstreet
23%inclusion53 decks227 decks
11%synergy
Glacial Fortress
20%inclusion45 decks227 decks
-22%synergy
Isolated Chapel
17%inclusion38 decks227 decks
-24%synergy
Starting Town
16%inclusion18 decks116 decks
11%synergy
Drowned Catacomb
15%inclusion35 decks227 decks
-22%synergy
Gloomlake Verge
15%inclusion35 decks227 decks
4%synergy
Floodfarm Verge
15%inclusion33 decks227 decks
3%synergy
Contaminated Landscape
12%inclusion27 decks227 decks
-2%synergy
Shipwreck Marsh
12%inclusion27 decks227 decks
-9%synergy
Valgavoth's Lair
12%inclusion27 decks227 decks
9%synergy
Terramorphic Expanse
11%inclusion26 decks227 decks
-5%synergy
Prairie Stream
11%inclusion26 decks227 decks
-29%synergy
Reflecting Pool
11%inclusion25 decks227 decks
3%synergy
Cavern of Souls
11%inclusion25 decks227 decks
4%synergy
Tainted Field
11%inclusion24 decks227 decks
4%synergy
Evolving Wilds
11%inclusion24 decks227 decks
-14%synergy
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