The Master of Keys (Commander) - Midrange

The Master of Keys
Rank #295
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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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Utility Artifacts
Enchantments
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Utility Lands
Mana Artifacts
Lands
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Gleaming Splendor
36%inclusion4 decks11 decks
28%synergy
The Queen of Dale
21%inclusion3 decks14 decks
17%synergy
King T'Challa
14%inclusion3 decks22 decks
11%synergy
Super Intelligence
9.1%inclusion2 decks22 decks
9%synergy
Confusticate and Bebother
9.1%inclusion1 decks11 decks
9%synergy
High Synergy Cards
Necromancy
79%inclusion84 decks107 decks
74%synergy
Animate Dead
83%inclusion89 decks107 decks
74%synergy
Dress Down
72%inclusion77 decks107 decks
70%synergy
Abdel Adrian, Gorion's Ward
60%inclusion64 decks107 decks
58%synergy
Dance of the Dead
56%inclusion60 decks107 decks
54%synergy
Mystic Remora
74%inclusion79 decks107 decks
53%synergy
Amphibian Downpour
57%inclusion61 decks107 decks
52%synergy
Entomb
59%inclusion63 decks107 decks
52%synergy
Sevinne's Reclamation
55%inclusion59 decks107 decks
46%synergy
Ripples of Undeath
49%inclusion52 decks107 decks
46%synergy
Top Cards
Swords to Plowshares
64%inclusion69 decks107 decks
-3%synergy
Dark Ritual
63%inclusion67 decks107 decks
42%synergy
Esper Sentinel
58%inclusion62 decks107 decks
31%synergy
Swan Song
57%inclusion61 decks107 decks
37%synergy
Lotho, Corrupt Shirriff
55%inclusion59 decks107 decks
38%synergy
Silence
53%inclusion57 decks107 decks
43%synergy
Mirrormade
51%inclusion55 decks107 decks
42%synergy
Grand Abolisher
51%inclusion55 decks107 decks
37%synergy
Tainted Pact
51%inclusion55 decks107 decks
45%synergy
Force of Negation
50%inclusion54 decks107 decks
39%synergy
Game Changers
Smothering Tithe
70%inclusion75 decks107 decks
40%synergy
Rhystic Study
65%inclusion70 decks107 decks
35%synergy
Enlightened Tutor
62%inclusion66 decks107 decks
43%synergy
Demonic Tutor
59%inclusion63 decks107 decks
39%synergy
Thassa's Oracle
55%inclusion59 decks107 decks
46%synergy
Mana Vault
55%inclusion59 decks107 decks
47%synergy
Chrome Mox
54%inclusion58 decks107 decks
45%synergy
Vampiric Tutor
54%inclusion58 decks107 decks
38%synergy
Force of Will
54%inclusion58 decks107 decks
42%synergy
Ancient Tomb
53%inclusion57 decks107 decks
41%synergy
Creatures
Orcish Bowmasters
50%inclusion53 decks107 decks
40%synergy
Ranger-Captain of Eos
47%inclusion50 decks107 decks
41%synergy
Valley Floodcaller
44%inclusion47 decks107 decks
40%synergy
Inquisitive Glimmer
36%inclusion38 decks107 decks
29%synergy
Hullbreaker Horror
33%inclusion35 decks107 decks
27%synergy
Displacer Kitten
31%inclusion33 decks107 decks
24%synergy
Opposition Agent
31%inclusion33 decks107 decks
23%synergy
Mesa Enchantress
30%inclusion32 decks107 decks
21%synergy
Entity Tracker
30%inclusion32 decks107 decks
24%synergy
Starfield Mystic
28%inclusion30 decks107 decks
22%synergy
Wan Shi Tong, Librarian
27%inclusion12 decks45 decks
22%synergy
Mockingbird
26%inclusion28 decks107 decks
22%synergy
Voice of Victory
26%inclusion18 decks69 decks
18%synergy
Archivist of Oghma
25%inclusion27 decks107 decks
19%synergy
Scrabbling Skullcrab
25%inclusion27 decks107 decks
24%synergy
Ledger Shredder
25%inclusion27 decks107 decks
17%synergy
Lurrus of the Dream-Den
24%inclusion26 decks107 decks
23%synergy
Doomwake Giant
23%inclusion25 decks107 decks
18%synergy
Demon of Fate's Design
22%inclusion24 decks107 decks
17%synergy
Victor, Valgavoth's Seneschal
21%inclusion23 decks107 decks
20%synergy
Zur, Eternal Schemer
21%inclusion23 decks107 decks
18%synergy
Overlord of the Balemurk
21%inclusion22 decks107 decks
19%synergy
Auriok Salvagers
21%inclusion22 decks107 decks
20%synergy
Tataru Taru
20%inclusion12 decks61 decks
11%synergy
Gravebreaker Lamia
20%inclusion21 decks107 decks
19%synergy
Fear of Sleep Paralysis
20%inclusion21 decks107 decks
15%synergy
Faerie Mastermind
20%inclusion21 decks107 decks
10%synergy
Overlord of the Floodpits
18%inclusion19 decks107 decks
14%synergy
Zur the Enchanter
18%inclusion19 decks107 decks
13%synergy
Fear of Impostors
17%inclusion18 decks107 decks
15%synergy
Ondu Spiritdancer
17%inclusion18 decks107 decks
11%synergy
Exhibition Tidecaller
16%inclusion5 decks31 decks
16%synergy
Hedron Crab
16%inclusion17 decks107 decks
15%synergy
Grim Guardian
16%inclusion17 decks107 decks
13%synergy
Enduring Curiosity
15%inclusion16 decks107 decks
7%synergy
Drannith Magistrate
15%inclusion16 decks107 decks
8%synergy
Ghostly Dancers
15%inclusion16 decks107 decks
13%synergy
Phyrexian Metamorph
14%inclusion15 decks107 decks
6%synergy
Silent Hallcreeper
14%inclusion15 decks107 decks
9%synergy
Talion, the Kindly Lord
14%inclusion15 decks107 decks
7%synergy
Heliod, the Radiant Dawn
14%inclusion15 decks107 decks
11%synergy
Psychic Frog
11%inclusion12 decks107 decks
4%synergy
Archon of Sun's Grace
10%inclusion11 decks107 decks
6%synergy
Sage of Mysteries
10%inclusion11 decks107 decks
10%synergy
Soaring Lightbringer
10%inclusion11 decks107 decks
6%synergy
Moon-Blessed Cleric
10%inclusion11 decks107 decks
6%synergy
Ghostly Pilferer
10%inclusion11 decks107 decks
3%synergy
Summon: Yojimbo
10%inclusion6 decks61 decks
9%synergy
Leonin Relic-Warder
9.3%inclusion10 decks107 decks
9%synergy
Aminatou, Veil Piercer
9.3%inclusion10 decks107 decks
8%synergy
Instants
Flusterstorm
50%inclusion53 decks107 decks
42%synergy
An Offer You Can't Refuse
49%inclusion52 decks107 decks
20%synergy
Mindbreak Trap
48%inclusion51 decks107 decks
41%synergy
Mental Misstep
47%inclusion50 decks107 decks
40%synergy
Pact of Negation
47%inclusion50 decks107 decks
40%synergy
Demonic Consultation
46%inclusion49 decks107 decks
38%synergy
Fierce Guardianship
44%inclusion47 decks107 decks
24%synergy
Intuition
43%inclusion46 decks107 decks
41%synergy
Cyclonic Rift
43%inclusion46 decks107 decks
21%synergy
Borne Upon a Wind
42%inclusion45 decks107 decks
37%synergy
Mystical Tutor
39%inclusion42 decks107 decks
29%synergy
Cabal Ritual
32%inclusion34 decks107 decks
28%synergy
Sink into Stupor
27%inclusion29 decks107 decks
14%synergy
Chain of Vapor
26%inclusion28 decks107 decks
23%synergy
Mana Drain
24%inclusion26 decks107 decks
7%synergy
Gifts Ungiven
22%inclusion24 decks107 decks
20%synergy
Into the Flood Maw
21%inclusion23 decks107 decks
18%synergy
Counterspell
19%inclusion20 decks107 decks
-23%synergy
Dovin's Veto
15%inclusion16 decks107 decks
-12%synergy
Path to Exile
15%inclusion16 decks107 decks
-27%synergy
Frantic Search
13%inclusion14 decks107 decks
-6%synergy
Brain Freeze
12%inclusion13 decks107 decks
12%synergy
Muddle the Mixture
11%inclusion12 decks107 decks
8%synergy
Retraction Helix
11%inclusion12 decks107 decks
11%synergy
Darkblast
11%inclusion12 decks107 decks
11%synergy
Arcane Denial
11%inclusion12 decks107 decks
-9%synergy
Negate
10%inclusion11 decks107 decks
-6%synergy
Ad Nauseam
10%inclusion11 decks107 decks
8%synergy
Culling the Weak
9.3%inclusion10 decks107 decks
8%synergy
Dispel
9.3%inclusion10 decks107 decks
6%synergy
Void Rend
9.3%inclusion10 decks107 decks
-26%synergy
Strix Serenade
9.3%inclusion10 decks107 decks
6%synergy
Orim's Chant
7.5%inclusion8 decks107 decks
6%synergy
Banishing Knack
7.5%inclusion8 decks107 decks
7%synergy
Thirst for Meaning
7.5%inclusion8 decks107 decks
6%synergy
Anguished Unmaking
7.5%inclusion8 decks107 decks
-19%synergy
Deadly Rollick
6.5%inclusion7 decks107 decks
-10%synergy
Drown in the Loch
6.5%inclusion7 decks107 decks
5%synergy
Angel's Grace
6.5%inclusion7 decks107 decks
4%synergy
Faithful Mending
6.5%inclusion7 decks107 decks
3%synergy
Misdirection
6.5%inclusion7 decks107 decks
4%synergy
Lim-Dûl's Vault
5.6%inclusion6 decks107 decks
3%synergy
Commandeer
5.6%inclusion6 decks107 decks
4%synergy
Otherworldly Gaze
5.6%inclusion6 decks107 decks
3%synergy
Swallowed by Leviathan
5.0%inclusion3 decks60 decks
5%synergy
Sorceries
Imperial Seal
42%inclusion45 decks107 decks
35%synergy
Reanimate
28%inclusion30 decks107 decks
12%synergy
Windfall
27%inclusion29 decks107 decks
14%synergy
Lively Dirge
20%inclusion21 decks107 decks
18%synergy
Toxic Deluge
19%inclusion20 decks107 decks
-1%synergy
Mnemonic Betrayal
15%inclusion16 decks107 decks
12%synergy
Beseech the Mirror
15%inclusion16 decks107 decks
11%synergy
Demonic Counsel
13%inclusion14 decks107 decks
12%synergy
Singularity Rupture
13%inclusion7 decks56 decks
10%synergy
Redress Fate
12%inclusion13 decks107 decks
7%synergy
Buried Alive
10%inclusion11 decks107 decks
6%synergy
Dance of the Manse
10%inclusion11 decks107 decks
7%synergy
Flash Photography
10%inclusion5 decks49 decks
9%synergy
Unmarked Grave
8.4%inclusion9 decks107 decks
7%synergy
Yawgmoth's Will
7.5%inclusion8 decks107 decks
6%synergy
Praetor's Grasp
7.5%inclusion8 decks107 decks
5%synergy
Extinguish All Hope
7.5%inclusion8 decks107 decks
6%synergy
Diabolic Intent
6.5%inclusion7 decks107 decks
2%synergy
Glimpse the Unthinkable
6.5%inclusion7 decks107 decks
6%synergy
Idyllic Tutor
6.5%inclusion7 decks107 decks
2%synergy
Supreme Verdict
5.6%inclusion6 decks107 decks
-9%synergy
Damn
5.6%inclusion6 decks107 decks
-15%synergy
Space-Time Anomaly
5.4%inclusion3 decks56 decks
4%synergy
Utility Artifacts
The One Ring
40%inclusion43 decks107 decks
28%synergy
Wishclaw Talisman
38%inclusion41 decks107 decks
31%synergy
Mesmeric Orb
9.3%inclusion10 decks107 decks
8%synergy
Vexing Bauble
6.5%inclusion7 decks107 decks
5%synergy
Lightning Greaves
5.6%inclusion6 decks107 decks
-17%synergy
Enchantments
Blind Obedience
50%inclusion53 decks107 decks
38%synergy
Tinybones Joins Up
46%inclusion49 decks107 decks
45%synergy
Touch the Spirit Realm
38%inclusion41 decks107 decks
36%synergy
Necropotence
35%inclusion37 decks107 decks
28%synergy
The Meathook Massacre
34%inclusion36 decks107 decks
30%synergy
Sphere of Safety
26%inclusion28 decks107 decks
17%synergy
Copy Artifact
25%inclusion27 decks107 decks
24%synergy
Static Prison
25%inclusion27 decks107 decks
25%synergy
Monologue Tax
24%inclusion26 decks107 decks
18%synergy
Seal of Cleansing
23%inclusion25 decks107 decks
22%synergy
Propaganda
22%inclusion24 decks107 decks
-7%synergy
Copy Enchantment
21%inclusion23 decks107 decks
17%synergy
Secret Arcade // Dusty Parlor
21%inclusion23 decks107 decks
17%synergy
Grasp of Fate
21%inclusion22 decks107 decks
14%synergy
Cemetery Tampering
18%inclusion19 decks107 decks
17%synergy
Ghostly Prison
18%inclusion19 decks107 decks
-6%synergy
Sigil of the Empty Throne
17%inclusion18 decks107 decks
11%synergy
Seal of Removal
17%inclusion18 decks107 decks
16%synergy
Founding the Third Path
15%inclusion16 decks107 decks
15%synergy
Darksteel Mutation
14%inclusion15 decks107 decks
8%synergy
Estrid's Invocation
14%inclusion15 decks107 decks
9%synergy
Sheltered by Ghosts
14%inclusion15 decks107 decks
11%synergy
Steal Enchantment
13%inclusion14 decks107 decks
12%synergy
Starfield of Nyx
13%inclusion14 decks107 decks
9%synergy
Greater Auramancy
13%inclusion14 decks107 decks
9%synergy
Counterbalance
11%inclusion12 decks107 decks
10%synergy
Ethereal Armor
11%inclusion12 decks107 decks
7%synergy
Cacophony Unleashed
10%inclusion11 decks107 decks
9%synergy
Authority of the Consuls
10%inclusion11 decks107 decks
-4%synergy
Trouble in Pairs
10%inclusion11 decks107 decks
5%synergy
Changing Loyalty
10%inclusion3 decks31 decks
9%synergy
All That Glitters
9.3%inclusion10 decks107 decks
1%synergy
Restricted Office // Lecture Hall
9.3%inclusion10 decks107 decks
7%synergy
Nowhere to Run
9.3%inclusion10 decks107 decks
8%synergy
Mirror Room // Fractured Realm
9.3%inclusion10 decks107 decks
7%synergy
Phyrexian Arena
9.3%inclusion10 decks107 decks
-5%synergy
Celebrate the Mountain-king
9.1%inclusion1 decks11 decks
9%synergy
Imprisoned in the Moon
8.4%inclusion9 decks107 decks
2%synergy
The Tale of Tamiyo
8.4%inclusion9 decks107 decks
8%synergy
Black Market Connections
8.4%inclusion9 decks107 decks
-7%synergy
Chains of Mephistopheles
8.4%inclusion9 decks107 decks
8%synergy
Defiled Crypt // Cadaver Lab
8.4%inclusion9 decks107 decks
8%synergy
Timely Ward
7.5%inclusion8 decks107 decks
3%synergy
Noggle the Mind
7.3%inclusion3 decks41 decks
7%synergy
Court of Cunning
6.5%inclusion7 decks107 decks
6%synergy
Shark Typhoon
6.5%inclusion7 decks107 decks
1%synergy
Leyline of Anticipation
6.5%inclusion7 decks107 decks
2%synergy
Bottomless Pool // Locker Room
6.5%inclusion7 decks107 decks
5%synergy
Eaten by Piranhas
6.5%inclusion7 decks107 decks
5%synergy
Polluted Cistern // Dim Oubliette
6.5%inclusion7 decks107 decks
6%synergy
Planeswalkers
Teferi, Time Raveler
23%inclusion25 decks107 decks
15%synergy
Utility Lands
Otawara, Soaring City
50%inclusion54 decks107 decks
31%synergy
Hall of Heliod's Generosity
28%inclusion30 decks107 decks
15%synergy
Urza's Saga
26%inclusion28 decks107 decks
15%synergy
Emergence Zone
21%inclusion22 decks107 decks
19%synergy
Cephalid Coliseum
20%inclusion21 decks107 decks
16%synergy
Bojuka Bog
19%inclusion20 decks107 decks
-8%synergy
Minamo, School at Water's Edge
11%inclusion12 decks107 decks
8%synergy
Serra's Sanctum
10%inclusion11 decks107 decks
9%synergy
City of Traitors
10%inclusion11 decks107 decks
9%synergy
Ishgard, the Holy See
6.6%inclusion4 decks61 decks
3%synergy
Urborg, Tomb of Yawgmoth
6.5%inclusion7 decks107 decks
-6%synergy
Takenuma, Abandoned Mire
5.6%inclusion6 decks107 decks
-1%synergy
Adagia, Windswept Bastion
5.4%inclusion3 decks56 decks
3%synergy
Mana Artifacts
Sol Ring
96%inclusion103 decks107 decks
7%synergy
Arcane Signet
93%inclusion100 decks107 decks
6%synergy
Talisman of Dominance
71%inclusion76 decks107 decks
21%synergy
Fellwar Stone
59%inclusion63 decks107 decks
26%synergy
Talisman of Progress
56%inclusion60 decks107 decks
11%synergy
Lotus Petal
56%inclusion60 decks107 decks
46%synergy
Mox Opal
48%inclusion51 decks107 decks
40%synergy
Mox Diamond
48%inclusion51 decks107 decks
41%synergy
Talisman of Hierarchy
46%inclusion49 decks107 decks
1%synergy
Lion's Eye Diamond
36%inclusion38 decks107 decks
33%synergy
Mox Amber
22%inclusion24 decks107 decks
16%synergy
Grim Monolith
20%inclusion21 decks107 decks
16%synergy
Orzhov Signet
17%inclusion18 decks107 decks
-14%synergy
Azorius Signet
17%inclusion18 decks107 decks
-12%synergy
Dimir Signet
12%inclusion13 decks107 decks
-17%synergy
Mind Stone
8.4%inclusion9 decks107 decks
-3%synergy
Lands
Command Tower
95%inclusion102 decks107 decks
3%synergy
Watery Grave
75%inclusion80 decks107 decks
23%synergy
Polluted Delta
72%inclusion77 decks107 decks
34%synergy
Flooded Strand
71%inclusion76 decks107 decks
32%synergy
Exotic Orchard
70%inclusion75 decks107 decks
11%synergy
Godless Shrine
70%inclusion75 decks107 decks
18%synergy
Hallowed Fountain
70%inclusion75 decks107 decks
19%synergy
Island
67%inclusion72 decks107 decks
-26%synergy
Marsh Flats
67%inclusion72 decks107 decks
31%synergy
Swamp
62%inclusion66 decks107 decks
-30%synergy
Plains
56%inclusion60 decks107 decks
-36%synergy
Mana Confluence
56%inclusion60 decks107 decks
42%synergy
City of Brass
56%inclusion60 decks107 decks
41%synergy
Gemstone Caverns
53%inclusion57 decks107 decks
46%synergy
Morphic Pool
52%inclusion56 decks107 decks
19%synergy
Misty Rainforest
51%inclusion55 decks107 decks
41%synergy
Bloodstained Mire
50%inclusion54 decks107 decks
40%synergy
Tundra
50%inclusion53 decks107 decks
33%synergy
Scrubland
50%inclusion53 decks107 decks
33%synergy
Underground Sea
49%inclusion52 decks107 decks
33%synergy
Verdant Catacombs
48%inclusion51 decks107 decks
38%synergy
Scalding Tarn
44%inclusion47 decks107 decks
33%synergy
Undercity Sewers
43%inclusion46 decks107 decks
28%synergy
Windswept Heath
38%inclusion41 decks107 decks
29%synergy
Vault of Champions
38%inclusion41 decks107 decks
6%synergy
Arid Mesa
37%inclusion40 decks107 decks
28%synergy
Sea of Clouds
35%inclusion37 decks107 decks
-0%synergy
Caves of Koilos
31%inclusion33 decks107 decks
-5%synergy
Adarkar Wastes
31%inclusion33 decks107 decks
-2%synergy
Underground River
29%inclusion31 decks107 decks
-7%synergy
Arcane Sanctum
28%inclusion30 decks107 decks
-26%synergy
Sink into Stupor
27%inclusion29 decks107 decks
14%synergy
Glacial Fortress
24%inclusion26 decks107 decks
-20%synergy
Isolated Chapel
21%inclusion23 decks107 decks
-21%synergy
Meticulous Archive
21%inclusion22 decks107 decks
7%synergy
Starting Town
20%inclusion12 decks61 decks
16%synergy
Drowned Catacomb
20%inclusion21 decks107 decks
-20%synergy
Sunken Hollow
20%inclusion21 decks107 decks
-20%synergy
Raffine's Tower
19%inclusion20 decks107 decks
-22%synergy
Prairie Stream
17%inclusion18 decks107 decks
-24%synergy
Deserted Beach
17%inclusion18 decks107 decks
-4%synergy
Floodfarm Verge
17%inclusion18 decks107 decks
6%synergy
Shadowy Backstreet
16%inclusion17 decks107 decks
3%synergy
Contaminated Landscape
16%inclusion17 decks107 decks
3%synergy
Shipwreck Marsh
14%inclusion15 decks107 decks
-7%synergy
Valgavoth's Lair
14%inclusion15 decks107 decks
12%synergy
Evolving Wilds
14%inclusion15 decks107 decks
-10%synergy
Gloomlake Verge
13%inclusion14 decks107 decks
2%synergy
Temple of Deceit
12%inclusion13 decks107 decks
-4%synergy
Spire of Industry
12%inclusion13 decks107 decks
5%synergy
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