The Master of Keys (Commander) - Midrange

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
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Twilight Diviner
13%inclusion2 decks16 decks
11%synergy
Noggle the Mind
13%inclusion2 decks16 decks
12%synergy
Mornsong Aria
5.9%inclusion1 decks17 decks
5%synergy
Sygg, Wanderwine Wisdom
3.3%inclusion1 decks30 decks
2%synergy
High Synergy Cards
Necromancy
82%inclusion78 decks95 decks
77%synergy
Animate Dead
83%inclusion79 decks95 decks
74%synergy
Dress Down
72%inclusion68 decks95 decks
69%synergy
Abdel Adrian, Gorion's Ward
60%inclusion57 decks95 decks
58%synergy
Dance of the Dead
60%inclusion57 decks95 decks
58%synergy
Mystic Remora
76%inclusion72 decks95 decks
55%synergy
Entomb
60%inclusion57 decks95 decks
53%synergy
Amphibian Downpour
56%inclusion53 decks95 decks
51%synergy
Ripples of Undeath
52%inclusion49 decks95 decks
49%synergy
Sevinne's Reclamation
57%inclusion54 decks95 decks
48%synergy
Top Cards
Dark Ritual
62%inclusion59 decks95 decks
43%synergy
Swords to Plowshares
59%inclusion56 decks95 decks
-9%synergy
Esper Sentinel
57%inclusion54 decks95 decks
29%synergy
Swan Song
57%inclusion54 decks95 decks
37%synergy
Grand Abolisher
55%inclusion52 decks95 decks
40%synergy
Lotho, Corrupt Shirriff
53%inclusion50 decks95 decks
36%synergy
Silence
53%inclusion50 decks95 decks
42%synergy
Tainted Pact
52%inclusion49 decks95 decks
44%synergy
Blind Obedience
51%inclusion48 decks95 decks
38%synergy
Mirrormade
49%inclusion47 decks95 decks
40%synergy
Game Changers
Smothering Tithe
68%inclusion65 decks95 decks
37%synergy
Rhystic Study
65%inclusion62 decks95 decks
34%synergy
Enlightened Tutor
62%inclusion59 decks95 decks
42%synergy
Demonic Tutor
59%inclusion56 decks95 decks
38%synergy
Mana Vault
56%inclusion53 decks95 decks
47%synergy
Force of Will
55%inclusion52 decks95 decks
42%synergy
Vampiric Tutor
55%inclusion52 decks95 decks
37%synergy
Thassa's Oracle
54%inclusion51 decks95 decks
44%synergy
Ancient Tomb
54%inclusion51 decks95 decks
41%synergy
Chrome Mox
53%inclusion50 decks95 decks
43%synergy
Creatures
Orcish Bowmasters
49%inclusion47 decks95 decks
39%synergy
Valley Floodcaller
47%inclusion45 decks95 decks
43%synergy
Ranger-Captain of Eos
46%inclusion44 decks95 decks
40%synergy
Inquisitive Glimmer
34%inclusion32 decks95 decks
26%synergy
Hullbreaker Horror
33%inclusion31 decks95 decks
26%synergy
Displacer Kitten
31%inclusion29 decks95 decks
23%synergy
Mesa Enchantress
31%inclusion29 decks95 decks
22%synergy
Opposition Agent
29%inclusion28 decks95 decks
21%synergy
Entity Tracker
29%inclusion28 decks95 decks
23%synergy
Archivist of Oghma
28%inclusion27 decks95 decks
22%synergy
Starfield Mystic
28%inclusion27 decks95 decks
22%synergy
Mockingbird
26%inclusion25 decks95 decks
22%synergy
Demon of Fate's Design
25%inclusion24 decks95 decks
20%synergy
Doomwake Giant
25%inclusion24 decks95 decks
19%synergy
Ledger Shredder
25%inclusion24 decks95 decks
16%synergy
Voice of Victory
25%inclusion14 decks56 decks
17%synergy
Scrabbling Skullcrab
22%inclusion21 decks95 decks
21%synergy
Lurrus of the Dream-Den
22%inclusion21 decks95 decks
21%synergy
Victor, Valgavoth's Seneschal
22%inclusion21 decks95 decks
20%synergy
Overlord of the Floodpits
21%inclusion20 decks95 decks
17%synergy
Fear of Sleep Paralysis
21%inclusion20 decks95 decks
16%synergy
Overlord of the Balemurk
20%inclusion19 decks95 decks
18%synergy
Zur, Eternal Schemer
20%inclusion19 decks95 decks
17%synergy
Gravebreaker Lamia
19%inclusion18 decks95 decks
18%synergy
Fear of Impostors
19%inclusion18 decks95 decks
17%synergy
Ondu Spiritdancer
19%inclusion18 decks95 decks
13%synergy
Auriok Salvagers
19%inclusion18 decks95 decks
19%synergy
Drannith Magistrate
18%inclusion17 decks95 decks
10%synergy
Phyrexian Metamorph
17%inclusion16 decks95 decks
8%synergy
Heliod, the Radiant Dawn
17%inclusion16 decks95 decks
13%synergy
Zur the Enchanter
17%inclusion16 decks95 decks
12%synergy
Wan Shi Tong, Librarian
16%inclusion4 decks25 decks
11%synergy
Hedron Crab
16%inclusion15 decks95 decks
15%synergy
Enduring Curiosity
16%inclusion15 decks95 decks
8%synergy
Grim Guardian
16%inclusion15 decks95 decks
13%synergy
Ghostly Dancers
16%inclusion15 decks95 decks
13%synergy
Silent Hallcreeper
14%inclusion13 decks95 decks
9%synergy
Talion, the Kindly Lord
14%inclusion13 decks95 decks
6%synergy
Faerie Mastermind
14%inclusion13 decks95 decks
4%synergy
Psychic Frog
14%inclusion13 decks95 decks
7%synergy
Ghostly Pilferer
13%inclusion12 decks95 decks
5%synergy
Moon-Blessed Cleric
12%inclusion11 decks95 decks
7%synergy
Summon: Yojimbo
11%inclusion5 decks46 decks
10%synergy
Soaring Lightbringer
11%inclusion10 decks95 decks
6%synergy
Alseid of Life's Bounty
11%inclusion10 decks95 decks
9%synergy
Aminatou, Veil Piercer
9.5%inclusion9 decks95 decks
8%synergy
High Fae Trickster
8.5%inclusion7 decks82 decks
4%synergy
Tataru Taru
8.5%inclusion4 decks47 decks
0%synergy
Archon of Sun's Grace
8.4%inclusion8 decks95 decks
4%synergy
Malevolent Hermit
8.4%inclusion8 decks95 decks
8%synergy
Instants
Force of Negation
49%inclusion47 decks95 decks
38%synergy
Flusterstorm
48%inclusion46 decks95 decks
40%synergy
Mental Misstep
47%inclusion45 decks95 decks
41%synergy
Mindbreak Trap
46%inclusion44 decks95 decks
39%synergy
Demonic Consultation
46%inclusion44 decks95 decks
38%synergy
Intuition
45%inclusion43 decks95 decks
44%synergy
Fierce Guardianship
45%inclusion43 decks95 decks
25%synergy
Pact of Negation
44%inclusion42 decks95 decks
36%synergy
Borne Upon a Wind
43%inclusion41 decks95 decks
38%synergy
An Offer You Can't Refuse
42%inclusion40 decks95 decks
15%synergy
Cyclonic Rift
41%inclusion39 decks95 decks
17%synergy
Mystical Tutor
40%inclusion38 decks95 decks
29%synergy
Cabal Ritual
34%inclusion32 decks95 decks
30%synergy
Sink into Stupor
27%inclusion26 decks95 decks
15%synergy
Mana Drain
25%inclusion24 decks95 decks
8%synergy
Chain of Vapor
22%inclusion21 decks95 decks
19%synergy
Gifts Ungiven
22%inclusion21 decks95 decks
20%synergy
Into the Flood Maw
19%inclusion18 decks95 decks
15%synergy
Counterspell
17%inclusion16 decks95 decks
-25%synergy
Dovin's Veto
15%inclusion14 decks95 decks
-11%synergy
Retraction Helix
15%inclusion14 decks95 decks
14%synergy
Path to Exile
15%inclusion14 decks95 decks
-27%synergy
Arcane Denial
14%inclusion13 decks95 decks
-7%synergy
Darkblast
13%inclusion12 decks95 decks
13%synergy
Frantic Search
12%inclusion11 decks95 decks
-6%synergy
Strix Serenade
11%inclusion10 decks95 decks
7%synergy
Negate
9.5%inclusion9 decks95 decks
-7%synergy
Brain Freeze
9.5%inclusion9 decks95 decks
9%synergy
Culling the Weak
9.5%inclusion9 decks95 decks
8%synergy
Dispel
9.5%inclusion9 decks95 decks
6%synergy
Deadly Rollick
8.4%inclusion8 decks95 decks
-6%synergy
Ad Nauseam
8.4%inclusion8 decks95 decks
6%synergy
Banishing Knack
7.4%inclusion7 decks95 decks
7%synergy
Void Rend
7.4%inclusion7 decks95 decks
-27%synergy
Muddle the Mixture
6.3%inclusion6 decks95 decks
2%synergy
Teferi's Protection
6.3%inclusion6 decks95 decks
-10%synergy
Thirst for Meaning
6.3%inclusion6 decks95 decks
5%synergy
Anguished Unmaking
6.3%inclusion6 decks95 decks
-19%synergy
Otherworldly Gaze
6.3%inclusion6 decks95 decks
4%synergy
Fell the Profane
5.3%inclusion5 decks95 decks
-4%synergy
Lim-Dûl's Vault
5.3%inclusion5 decks95 decks
2%synergy
Faithful Mending
5.3%inclusion5 decks95 decks
1%synergy
Saw in Half
5.3%inclusion5 decks95 decks
3%synergy
Sorceries
Imperial Seal
42%inclusion40 decks95 decks
35%synergy
Reanimate
31%inclusion29 decks95 decks
14%synergy
Windfall
26%inclusion25 decks95 decks
13%synergy
Toxic Deluge
20%inclusion19 decks95 decks
0%synergy
Lively Dirge
17%inclusion16 decks95 decks
16%synergy
Singularity Rupture
15%inclusion6 decks39 decks
13%synergy
Demonic Counsel
15%inclusion14 decks95 decks
14%synergy
Mnemonic Betrayal
14%inclusion13 decks95 decks
11%synergy
Beseech the Mirror
14%inclusion13 decks95 decks
10%synergy
Redress Fate
13%inclusion12 decks95 decks
7%synergy
Buried Alive
11%inclusion10 decks95 decks
6%synergy
Space-Time Anomaly
10%inclusion4 decks39 decks
9%synergy
Unmarked Grave
9.5%inclusion9 decks95 decks
8%synergy
Dance of the Manse
8.4%inclusion8 decks95 decks
5%synergy
Diabolic Intent
7.4%inclusion7 decks95 decks
2%synergy
Yawgmoth's Will
7.4%inclusion7 decks95 decks
6%synergy
Idyllic Tutor
7.4%inclusion7 decks95 decks
3%synergy
Supreme Verdict
6.3%inclusion6 decks95 decks
-9%synergy
Extinguish All Hope
6.3%inclusion6 decks95 decks
5%synergy
Replenish
5.3%inclusion5 decks95 decks
4%synergy
Glimpse the Unthinkable
5.3%inclusion5 decks95 decks
5%synergy
Praetor's Grasp
5.3%inclusion5 decks95 decks
2%synergy
Damn
5.3%inclusion5 decks95 decks
-15%synergy
Utility Artifacts
The One Ring
45%inclusion43 decks95 decks
32%synergy
Wishclaw Talisman
42%inclusion40 decks95 decks
34%synergy
Mesmeric Orb
11%inclusion10 decks95 decks
9%synergy
Vexing Bauble
7.4%inclusion7 decks95 decks
6%synergy
Sensei's Divining Top
6.3%inclusion6 decks95 decks
-3%synergy
Lightning Greaves
6.3%inclusion6 decks95 decks
-16%synergy
Enchantments
Tinybones Joins Up
44%inclusion42 decks95 decks
43%synergy
Touch the Spirit Realm
38%inclusion36 decks95 decks
35%synergy
The Meathook Massacre
34%inclusion32 decks95 decks
30%synergy
Necropotence
34%inclusion32 decks95 decks
27%synergy
Static Prison
29%inclusion28 decks95 decks
29%synergy
Copy Artifact
27%inclusion26 decks95 decks
26%synergy
Sphere of Safety
24%inclusion23 decks95 decks
15%synergy
Seal of Cleansing
24%inclusion23 decks95 decks
23%synergy
Secret Arcade // Dusty Parlor
22%inclusion21 decks95 decks
17%synergy
Propaganda
22%inclusion21 decks95 decks
-5%synergy
Grasp of Fate
21%inclusion20 decks95 decks
15%synergy
Monologue Tax
21%inclusion20 decks95 decks
15%synergy
Cemetery Tampering
19%inclusion18 decks95 decks
18%synergy
Seal of Removal
19%inclusion18 decks95 decks
18%synergy
Sigil of the Empty Throne
18%inclusion17 decks95 decks
12%synergy
Copy Enchantment
18%inclusion17 decks95 decks
13%synergy
Ghostly Prison
17%inclusion16 decks95 decks
-5%synergy
Estrid's Invocation
15%inclusion14 decks95 decks
10%synergy
Founding the Third Path
14%inclusion13 decks95 decks
14%synergy
Steal Enchantment
14%inclusion13 decks95 decks
13%synergy
Starfield of Nyx
14%inclusion13 decks95 decks
10%synergy
Greater Auramancy
14%inclusion13 decks95 decks
9%synergy
Sheltered by Ghosts
12%inclusion11 decks95 decks
9%synergy
Black Market Connections
12%inclusion11 decks95 decks
-3%synergy
Stillness in Motion
11%inclusion6 decks54 decks
11%synergy
Teval's Judgment
11%inclusion6 decks56 decks
10%synergy
Counterbalance
11%inclusion10 decks95 decks
9%synergy
Mirror Room // Fractured Realm
11%inclusion10 decks95 decks
8%synergy
Phyrexian Arena
11%inclusion10 decks95 decks
-4%synergy
Trouble in Pairs
11%inclusion10 decks95 decks
5%synergy
Darksteel Mutation
9.5%inclusion9 decks95 decks
3%synergy
Cacophony Unleashed
9.5%inclusion9 decks95 decks
8%synergy
Authority of the Consuls
9.5%inclusion9 decks95 decks
-3%synergy
The Tale of Tamiyo
9.5%inclusion9 decks95 decks
9%synergy
Leyline of Anticipation
9.5%inclusion9 decks95 decks
5%synergy
Nowhere to Run
9.5%inclusion9 decks95 decks
8%synergy
Ethereal Armor
9.5%inclusion9 decks95 decks
5%synergy
Chains of Mephistopheles
9.5%inclusion9 decks95 decks
9%synergy
All That Glitters
8.4%inclusion8 decks95 decks
0%synergy
Restricted Office // Lecture Hall
8.4%inclusion8 decks95 decks
6%synergy
Chakra Meditation
8.3%inclusion2 decks24 decks
8%synergy
Imprisoned in the Moon
7.4%inclusion7 decks95 decks
1%synergy
Out of the Tombs
7.4%inclusion7 decks95 decks
7%synergy
Timely Ward
7.4%inclusion7 decks95 decks
2%synergy
Bottomless Pool // Locker Room
7.4%inclusion7 decks95 decks
5%synergy
Aura of Silence
7.4%inclusion7 decks95 decks
4%synergy
Defiled Crypt // Cadaver Lab
7.4%inclusion7 decks95 decks
7%synergy
Cramped Vents // Access Maze
6.3%inclusion6 decks95 decks
4%synergy
Shark Typhoon
6.3%inclusion6 decks95 decks
0%synergy
Dazzling Theater // Prop Room
6.3%inclusion6 decks95 decks
5%synergy
Planeswalkers
Teferi, Time Raveler
23%inclusion22 decks95 decks
15%synergy
Utility Lands
Otawara, Soaring City
49%inclusion47 decks95 decks
30%synergy
Hall of Heliod's Generosity
27%inclusion26 decks95 decks
14%synergy
Urza's Saga
25%inclusion24 decks95 decks
13%synergy
Emergence Zone
20%inclusion19 decks95 decks
18%synergy
Cephalid Coliseum
20%inclusion19 decks95 decks
16%synergy
Bojuka Bog
18%inclusion17 decks95 decks
-9%synergy
Minamo, School at Water's Edge
14%inclusion13 decks95 decks
10%synergy
Serra's Sanctum
13%inclusion12 decks95 decks
11%synergy
Ishgard, the Holy See
11%inclusion5 decks47 decks
7%synergy
Adagia, Windswept Bastion
7.7%inclusion3 decks39 decks
5%synergy
City of Traitors
7.4%inclusion7 decks95 decks
6%synergy
Urborg, Tomb of Yawgmoth
6.3%inclusion6 decks95 decks
-7%synergy
Takenuma, Abandoned Mire
5.3%inclusion5 decks95 decks
-1%synergy
Mana Artifacts
Sol Ring
96%inclusion91 decks95 decks
6%synergy
Arcane Signet
92%inclusion87 decks95 decks
4%synergy
Talisman of Dominance
75%inclusion71 decks95 decks
25%synergy
Fellwar Stone
57%inclusion54 decks95 decks
23%synergy
Talisman of Progress
55%inclusion52 decks95 decks
11%synergy
Lotus Petal
53%inclusion50 decks95 decks
42%synergy
Mox Diamond
49%inclusion47 decks95 decks
42%synergy
Talisman of Hierarchy
47%inclusion45 decks95 decks
4%synergy
Mox Opal
46%inclusion44 decks95 decks
38%synergy
Lion's Eye Diamond
36%inclusion34 decks95 decks
34%synergy
Mox Amber
22%inclusion21 decks95 decks
16%synergy
Grim Monolith
20%inclusion19 decks95 decks
17%synergy
Orzhov Signet
17%inclusion16 decks95 decks
-17%synergy
Azorius Signet
17%inclusion16 decks95 decks
-15%synergy
Dimir Signet
12%inclusion11 decks95 decks
-20%synergy
Mind Stone
8.4%inclusion8 decks95 decks
-4%synergy
Lands
Command Tower
96%inclusion91 decks95 decks
3%synergy
Watery Grave
76%inclusion72 decks95 decks
25%synergy
Polluted Delta
75%inclusion71 decks95 decks
37%synergy
Flooded Strand
73%inclusion69 decks95 decks
34%synergy
Hallowed Fountain
72%inclusion68 decks95 decks
22%synergy
Exotic Orchard
69%inclusion66 decks95 decks
11%synergy
Godless Shrine
69%inclusion66 decks95 decks
19%synergy
Island
69%inclusion66 decks95 decks
-23%synergy
Marsh Flats
69%inclusion66 decks95 decks
33%synergy
Swamp
62%inclusion59 decks95 decks
-29%synergy
Plains
56%inclusion53 decks95 decks
-36%synergy
Mana Confluence
56%inclusion53 decks95 decks
42%synergy
City of Brass
56%inclusion53 decks95 decks
41%synergy
Tundra
52%inclusion49 decks95 decks
36%synergy
Misty Rainforest
52%inclusion49 decks95 decks
41%synergy
Scrubland
52%inclusion49 decks95 decks
36%synergy
Bloodstained Mire
52%inclusion49 decks95 decks
41%synergy
Underground Sea
51%inclusion48 decks95 decks
35%synergy
Gemstone Caverns
51%inclusion48 decks95 decks
43%synergy
Morphic Pool
49%inclusion47 decks95 decks
15%synergy
Verdant Catacombs
48%inclusion46 decks95 decks
38%synergy
Undercity Sewers
46%inclusion44 decks95 decks
32%synergy
Scalding Tarn
46%inclusion44 decks95 decks
35%synergy
Windswept Heath
40%inclusion38 decks95 decks
30%synergy
Arid Mesa
36%inclusion34 decks95 decks
26%synergy
Vault of Champions
36%inclusion34 decks95 decks
3%synergy
Caves of Koilos
32%inclusion30 decks95 decks
-4%synergy
Sea of Clouds
32%inclusion30 decks95 decks
-4%synergy
Underground River
32%inclusion30 decks95 decks
-2%synergy
Adarkar Wastes
31%inclusion29 decks95 decks
-1%synergy
Sink into Stupor
27%inclusion26 decks95 decks
15%synergy
Arcane Sanctum
26%inclusion25 decks95 decks
-28%synergy
Glacial Fortress
24%inclusion23 decks95 decks
-17%synergy
Meticulous Archive
22%inclusion21 decks95 decks
8%synergy
Isolated Chapel
20%inclusion19 decks95 decks
-20%synergy
Shadowy Backstreet
19%inclusion18 decks95 decks
6%synergy
Raffine's Tower
19%inclusion18 decks95 decks
-22%synergy
Sunken Hollow
19%inclusion18 decks95 decks
-21%synergy
Drowned Catacomb
18%inclusion17 decks95 decks
-19%synergy
Contaminated Landscape
16%inclusion15 decks95 decks
2%synergy
Prairie Stream
16%inclusion15 decks95 decks
-25%synergy
Floodfarm Verge
16%inclusion15 decks95 decks
5%synergy
Valgavoth's Lair
15%inclusion14 decks95 decks
12%synergy
Deserted Beach
15%inclusion14 decks95 decks
-6%synergy
Temple of Deceit
14%inclusion13 decks95 decks
-4%synergy
Shipwreck Marsh
14%inclusion13 decks95 decks
-7%synergy
Gloomlake Verge
14%inclusion13 decks95 decks
3%synergy
Spire of Industry
13%inclusion12 decks95 decks
4%synergy
Temple of Silence
13%inclusion12 decks95 decks
-7%synergy
Temple of Enlightenment
12%inclusion11 decks95 decks
-5%synergy
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