The Master of Keys (Commander) - Midrange

The Master of Keys
Rank #302
102decks
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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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Exhibition Tidecaller
24%inclusion5 decks21 decks
23%synergy
Super Intelligence
10%inclusion1 decks10 decks
10%synergy
Eiganjo Dynastorian
5.0%inclusion1 decks20 decks
4%synergy
Turbulent Moor
5.0%inclusion1 decks20 decks
2%synergy
Scriv, the Obligator
5.0%inclusion1 decks20 decks
5%synergy
High Synergy Cards
Necromancy
79%inclusion81 decks102 decks
75%synergy
Animate Dead
81%inclusion83 decks102 decks
72%synergy
Dress Down
72%inclusion73 decks102 decks
69%synergy
Abdel Adrian, Gorion's Ward
59%inclusion60 decks102 decks
57%synergy
Dance of the Dead
57%inclusion58 decks102 decks
55%synergy
Entomb
60%inclusion61 decks102 decks
53%synergy
Mystic Remora
74%inclusion75 decks102 decks
53%synergy
Amphibian Downpour
55%inclusion56 decks102 decks
50%synergy
Ripples of Undeath
50%inclusion51 decks102 decks
47%synergy
Tainted Pact
53%inclusion54 decks102 decks
46%synergy
Top Cards
Swords to Plowshares
63%inclusion64 decks102 decks
-5%synergy
Dark Ritual
62%inclusion63 decks102 decks
42%synergy
Esper Sentinel
57%inclusion58 decks102 decks
30%synergy
Swan Song
57%inclusion58 decks102 decks
37%synergy
Sevinne's Reclamation
55%inclusion56 decks102 decks
46%synergy
Lotho, Corrupt Shirriff
53%inclusion54 decks102 decks
36%synergy
Silence
53%inclusion54 decks102 decks
43%synergy
Grand Abolisher
53%inclusion54 decks102 decks
38%synergy
Mirrormade
52%inclusion53 decks102 decks
42%synergy
Flusterstorm
51%inclusion52 decks102 decks
43%synergy
Game Changers
Smothering Tithe
69%inclusion70 decks102 decks
38%synergy
Rhystic Study
64%inclusion65 decks102 decks
33%synergy
Enlightened Tutor
62%inclusion63 decks102 decks
43%synergy
Demonic Tutor
59%inclusion60 decks102 decks
39%synergy
Thassa's Oracle
56%inclusion57 decks102 decks
47%synergy
Mana Vault
56%inclusion57 decks102 decks
47%synergy
Force of Will
55%inclusion56 decks102 decks
43%synergy
Ancient Tomb
54%inclusion55 decks102 decks
42%synergy
Vampiric Tutor
54%inclusion55 decks102 decks
37%synergy
Chrome Mox
53%inclusion54 decks102 decks
44%synergy
Creatures
Orcish Bowmasters
49%inclusion50 decks102 decks
39%synergy
Ranger-Captain of Eos
47%inclusion48 decks102 decks
41%synergy
Valley Floodcaller
44%inclusion45 decks102 decks
40%synergy
Inquisitive Glimmer
35%inclusion36 decks102 decks
28%synergy
Hullbreaker Horror
34%inclusion35 decks102 decks
28%synergy
Displacer Kitten
32%inclusion33 decks102 decks
26%synergy
Opposition Agent
31%inclusion32 decks102 decks
23%synergy
Mesa Enchantress
30%inclusion31 decks102 decks
22%synergy
Entity Tracker
30%inclusion31 decks102 decks
24%synergy
Starfield Mystic
28%inclusion29 decks102 decks
22%synergy
Voice of Victory
28%inclusion18 decks64 decks
20%synergy
Archivist of Oghma
26%inclusion27 decks102 decks
20%synergy
Lurrus of the Dream-Den
25%inclusion26 decks102 decks
24%synergy
Mockingbird
25%inclusion26 decks102 decks
21%synergy
Ledger Shredder
25%inclusion26 decks102 decks
17%synergy
Scrabbling Skullcrab
25%inclusion25 decks102 decks
24%synergy
Demon of Fate's Design
24%inclusion24 decks102 decks
18%synergy
Doomwake Giant
24%inclusion24 decks102 decks
18%synergy
Victor, Valgavoth's Seneschal
23%inclusion23 decks102 decks
21%synergy
Auriok Salvagers
22%inclusion22 decks102 decks
21%synergy
Wan Shi Tong, Librarian
21%inclusion8 decks38 decks
16%synergy
Overlord of the Balemurk
21%inclusion21 decks102 decks
19%synergy
Fear of Sleep Paralysis
21%inclusion21 decks102 decks
16%synergy
Zur, Eternal Schemer
21%inclusion21 decks102 decks
17%synergy
Gravebreaker Lamia
20%inclusion20 decks102 decks
19%synergy
Overlord of the Floodpits
19%inclusion19 decks102 decks
15%synergy
Tataru Taru
18%inclusion10 decks56 decks
9%synergy
Zur the Enchanter
18%inclusion18 decks102 decks
13%synergy
Fear of Impostors
17%inclusion17 decks102 decks
15%synergy
Faerie Mastermind
17%inclusion17 decks102 decks
7%synergy
Enduring Curiosity
16%inclusion16 decks102 decks
8%synergy
Drannith Magistrate
16%inclusion16 decks102 decks
8%synergy
Grim Guardian
16%inclusion16 decks102 decks
13%synergy
Ghostly Dancers
16%inclusion16 decks102 decks
13%synergy
Ondu Spiritdancer
16%inclusion16 decks102 decks
10%synergy
Hedron Crab
15%inclusion15 decks102 decks
14%synergy
Talion, the Kindly Lord
15%inclusion15 decks102 decks
7%synergy
Heliod, the Radiant Dawn
15%inclusion15 decks102 decks
11%synergy
Phyrexian Metamorph
14%inclusion14 decks102 decks
6%synergy
Silent Hallcreeper
14%inclusion14 decks102 decks
9%synergy
Psychic Frog
12%inclusion12 decks102 decks
4%synergy
Summon: Yojimbo
11%inclusion6 decks55 decks
10%synergy
Soaring Lightbringer
11%inclusion11 decks102 decks
6%synergy
Moon-Blessed Cleric
11%inclusion11 decks102 decks
6%synergy
Alseid of Life's Bounty
11%inclusion11 decks102 decks
9%synergy
Ghostly Pilferer
11%inclusion11 decks102 decks
3%synergy
Archon of Sun's Grace
10%inclusion10 decks102 decks
5%synergy
Sage of Mysteries
10%inclusion10 decks102 decks
9%synergy
Aminatou, Veil Piercer
10%inclusion10 decks102 decks
8%synergy
Twilight Diviner
9.4%inclusion3 decks32 decks
8%synergy
Instants
Force of Negation
51%inclusion52 decks102 decks
39%synergy
Mindbreak Trap
48%inclusion49 decks102 decks
42%synergy
Mental Misstep
47%inclusion48 decks102 decks
41%synergy
Pact of Negation
47%inclusion48 decks102 decks
40%synergy
Demonic Consultation
46%inclusion47 decks102 decks
38%synergy
An Offer You Can't Refuse
45%inclusion46 decks102 decks
17%synergy
Fierce Guardianship
44%inclusion45 decks102 decks
24%synergy
Intuition
43%inclusion44 decks102 decks
42%synergy
Borne Upon a Wind
41%inclusion42 decks102 decks
36%synergy
Cyclonic Rift
41%inclusion42 decks102 decks
18%synergy
Mystical Tutor
40%inclusion41 decks102 decks
30%synergy
Cabal Ritual
33%inclusion34 decks102 decks
30%synergy
Sink into Stupor
26%inclusion27 decks102 decks
13%synergy
Chain of Vapor
25%inclusion26 decks102 decks
23%synergy
Mana Drain
25%inclusion26 decks102 decks
8%synergy
Gifts Ungiven
22%inclusion22 decks102 decks
19%synergy
Into the Flood Maw
21%inclusion21 decks102 decks
17%synergy
Counterspell
20%inclusion20 decks102 decks
-22%synergy
Path to Exile
16%inclusion16 decks102 decks
-27%synergy
Frantic Search
14%inclusion14 decks102 decks
-5%synergy
Dovin's Veto
14%inclusion14 decks102 decks
-12%synergy
Retraction Helix
13%inclusion13 decks102 decks
12%synergy
Muddle the Mixture
12%inclusion12 decks102 decks
8%synergy
Brain Freeze
12%inclusion12 decks102 decks
11%synergy
Darkblast
12%inclusion12 decks102 decks
12%synergy
Negate
11%inclusion11 decks102 decks
-5%synergy
Arcane Denial
11%inclusion11 decks102 decks
-9%synergy
Culling the Weak
10%inclusion10 decks102 decks
8%synergy
Dispel
10%inclusion10 decks102 decks
7%synergy
Void Rend
10%inclusion10 decks102 decks
-25%synergy
Ad Nauseam
10%inclusion10 decks102 decks
8%synergy
Strix Serenade
8.8%inclusion9 decks102 decks
5%synergy
Deadly Rollick
7.8%inclusion8 decks102 decks
-8%synergy
Anguished Unmaking
7.8%inclusion8 decks102 decks
-18%synergy
Drown in the Loch
6.9%inclusion7 decks102 decks
5%synergy
Thirst for Meaning
6.9%inclusion7 decks102 decks
5%synergy
Faithful Mending
6.9%inclusion7 decks102 decks
3%synergy
Orim's Chant
5.9%inclusion6 decks102 decks
4%synergy
Lim-Dûl's Vault
5.9%inclusion6 decks102 decks
3%synergy
Banishing Knack
5.9%inclusion6 decks102 decks
6%synergy
Otherworldly Gaze
5.9%inclusion6 decks102 decks
4%synergy
Misdirection
5.9%inclusion6 decks102 decks
3%synergy
Swallowed by Leviathan
5.6%inclusion3 decks54 decks
5%synergy
Dreams of Laguna
5.5%inclusion3 decks55 decks
5%synergy
Sorceries
Imperial Seal
43%inclusion44 decks102 decks
36%synergy
Reanimate
29%inclusion30 decks102 decks
13%synergy
Windfall
26%inclusion27 decks102 decks
13%synergy
Toxic Deluge
20%inclusion20 decks102 decks
-0%synergy
Lively Dirge
18%inclusion18 decks102 decks
16%synergy
Mnemonic Betrayal
16%inclusion16 decks102 decks
13%synergy
Singularity Rupture
14%inclusion7 decks49 decks
12%synergy
Demonic Counsel
14%inclusion14 decks102 decks
13%synergy
Beseech the Mirror
14%inclusion14 decks102 decks
10%synergy
Redress Fate
12%inclusion12 decks102 decks
6%synergy
Buried Alive
11%inclusion11 decks102 decks
7%synergy
Dance of the Manse
11%inclusion11 decks102 decks
8%synergy
Unmarked Grave
8.8%inclusion9 decks102 decks
8%synergy
Diabolic Intent
7.8%inclusion8 decks102 decks
3%synergy
Yawgmoth's Will
7.8%inclusion8 decks102 decks
7%synergy
Extinguish All Hope
7.8%inclusion8 decks102 decks
6%synergy
Flash Photography
7.1%inclusion3 decks42 decks
6%synergy
Idyllic Tutor
6.9%inclusion7 decks102 decks
3%synergy
Praetor's Grasp
6.9%inclusion7 decks102 decks
4%synergy
Supreme Verdict
5.9%inclusion6 decks102 decks
-9%synergy
Glimpse the Unthinkable
5.9%inclusion6 decks102 decks
5%synergy
Utility Artifacts
The One Ring
42%inclusion43 decks102 decks
30%synergy
Wishclaw Talisman
40%inclusion41 decks102 decks
33%synergy
Mesmeric Orb
10%inclusion10 decks102 decks
9%synergy
Vexing Bauble
6.9%inclusion7 decks102 decks
5%synergy
Lightning Greaves
5.9%inclusion6 decks102 decks
-17%synergy
Enchantments
Blind Obedience
50%inclusion51 decks102 decks
38%synergy
Tinybones Joins Up
45%inclusion46 decks102 decks
44%synergy
Touch the Spirit Realm
38%inclusion39 decks102 decks
36%synergy
Necropotence
36%inclusion37 decks102 decks
30%synergy
The Meathook Massacre
33%inclusion34 decks102 decks
30%synergy
Static Prison
26%inclusion27 decks102 decks
26%synergy
Copy Artifact
25%inclusion26 decks102 decks
24%synergy
Sphere of Safety
25%inclusion26 decks102 decks
16%synergy
Propaganda
25%inclusion25 decks102 decks
-4%synergy
Monologue Tax
24%inclusion24 decks102 decks
17%synergy
Seal of Cleansing
23%inclusion23 decks102 decks
21%synergy
Grasp of Fate
21%inclusion21 decks102 decks
15%synergy
Copy Enchantment
21%inclusion21 decks102 decks
16%synergy
Secret Arcade // Dusty Parlor
21%inclusion21 decks102 decks
16%synergy
Ghostly Prison
19%inclusion19 decks102 decks
-4%synergy
Sigil of the Empty Throne
18%inclusion18 decks102 decks
12%synergy
Cemetery Tampering
17%inclusion17 decks102 decks
16%synergy
Seal of Removal
17%inclusion17 decks102 decks
16%synergy
Estrid's Invocation
14%inclusion14 decks102 decks
9%synergy
Starfield of Nyx
14%inclusion14 decks102 decks
10%synergy
Sheltered by Ghosts
14%inclusion14 decks102 decks
11%synergy
Darksteel Mutation
13%inclusion13 decks102 decks
7%synergy
Founding the Third Path
13%inclusion13 decks102 decks
13%synergy
Steal Enchantment
13%inclusion13 decks102 decks
12%synergy
Counterbalance
12%inclusion12 decks102 decks
10%synergy
Greater Auramancy
12%inclusion12 decks102 decks
7%synergy
Trouble in Pairs
12%inclusion12 decks102 decks
7%synergy
Cacophony Unleashed
11%inclusion11 decks102 decks
9%synergy
Ethereal Armor
11%inclusion11 decks102 decks
6%synergy
All That Glitters
10%inclusion10 decks102 decks
1%synergy
Restricted Office // Lecture Hall
10%inclusion10 decks102 decks
8%synergy
Nowhere to Run
10%inclusion10 decks102 decks
9%synergy
Mirror Room // Fractured Realm
10%inclusion10 decks102 decks
8%synergy
Chains of Mephistopheles
10%inclusion10 decks102 decks
10%synergy
Phyrexian Arena
10%inclusion10 decks102 decks
-4%synergy
Noggle the Mind
9.4%inclusion3 decks32 decks
9%synergy
Imprisoned in the Moon
8.8%inclusion9 decks102 decks
2%synergy
The Tale of Tamiyo
8.8%inclusion9 decks102 decks
8%synergy
Defiled Crypt // Cadaver Lab
8.8%inclusion9 decks102 decks
8%synergy
Authority of the Consuls
7.8%inclusion8 decks102 decks
-5%synergy
Black Market Connections
7.8%inclusion8 decks102 decks
-7%synergy
Court of Cunning
6.9%inclusion7 decks102 decks
6%synergy
Shark Typhoon
6.9%inclusion7 decks102 decks
1%synergy
Timely Ward
6.9%inclusion7 decks102 decks
2%synergy
Leyline of Anticipation
6.9%inclusion7 decks102 decks
3%synergy
Bottomless Pool // Locker Room
6.9%inclusion7 decks102 decks
5%synergy
Eaten by Piranhas
6.9%inclusion7 decks102 decks
6%synergy
Polluted Cistern // Dim Oubliette
6.9%inclusion7 decks102 decks
6%synergy
Hallowed Haunting
6.9%inclusion7 decks102 decks
5%synergy
Stillness in Motion
6.5%inclusion4 decks62 decks
6%synergy
Planeswalkers
Teferi, Time Raveler
25%inclusion25 decks102 decks
16%synergy
Utility Lands
Otawara, Soaring City
51%inclusion52 decks102 decks
32%synergy
Hall of Heliod's Generosity
27%inclusion28 decks102 decks
15%synergy
Urza's Saga
25%inclusion25 decks102 decks
13%synergy
Emergence Zone
19%inclusion19 decks102 decks
17%synergy
Cephalid Coliseum
19%inclusion19 decks102 decks
15%synergy
Bojuka Bog
18%inclusion18 decks102 decks
-9%synergy
Serra's Sanctum
12%inclusion12 decks102 decks
10%synergy
Minamo, School at Water's Edge
11%inclusion11 decks102 decks
7%synergy
City of Traitors
11%inclusion11 decks102 decks
10%synergy
Ishgard, the Holy See
8.9%inclusion5 decks56 decks
5%synergy
Adagia, Windswept Bastion
6.1%inclusion3 decks49 decks
4%synergy
Urborg, Tomb of Yawgmoth
5.9%inclusion6 decks102 decks
-7%synergy
Mana Artifacts
Sol Ring
96%inclusion98 decks102 decks
6%synergy
Arcane Signet
94%inclusion96 decks102 decks
6%synergy
Talisman of Dominance
74%inclusion75 decks102 decks
23%synergy
Fellwar Stone
60%inclusion61 decks102 decks
27%synergy
Talisman of Progress
58%inclusion59 decks102 decks
14%synergy
Lotus Petal
56%inclusion57 decks102 decks
46%synergy
Mox Diamond
49%inclusion50 decks102 decks
42%synergy
Mox Opal
48%inclusion49 decks102 decks
40%synergy
Talisman of Hierarchy
47%inclusion48 decks102 decks
2%synergy
Lion's Eye Diamond
35%inclusion36 decks102 decks
33%synergy
Grim Monolith
21%inclusion21 decks102 decks
17%synergy
Mox Amber
21%inclusion21 decks102 decks
14%synergy
Orzhov Signet
17%inclusion17 decks102 decks
-15%synergy
Azorius Signet
17%inclusion17 decks102 decks
-13%synergy
Dimir Signet
13%inclusion13 decks102 decks
-17%synergy
Mind Stone
6.9%inclusion7 decks102 decks
-5%synergy
Lands
Command Tower
96%inclusion98 decks102 decks
3%synergy
Watery Grave
75%inclusion77 decks102 decks
24%synergy
Polluted Delta
73%inclusion74 decks102 decks
34%synergy
Flooded Strand
72%inclusion73 decks102 decks
33%synergy
Exotic Orchard
71%inclusion72 decks102 decks
12%synergy
Godless Shrine
71%inclusion72 decks102 decks
19%synergy
Hallowed Fountain
71%inclusion72 decks102 decks
20%synergy
Marsh Flats
68%inclusion69 decks102 decks
32%synergy
Island
67%inclusion68 decks102 decks
-26%synergy
Swamp
63%inclusion64 decks102 decks
-29%synergy
Plains
57%inclusion58 decks102 decks
-35%synergy
City of Brass
57%inclusion58 decks102 decks
42%synergy
Mana Confluence
56%inclusion57 decks102 decks
42%synergy
Gemstone Caverns
54%inclusion55 decks102 decks
46%synergy
Morphic Pool
52%inclusion53 decks102 decks
18%synergy
Bloodstained Mire
52%inclusion53 decks102 decks
41%synergy
Tundra
51%inclusion52 decks102 decks
35%synergy
Misty Rainforest
51%inclusion52 decks102 decks
40%synergy
Scrubland
51%inclusion52 decks102 decks
35%synergy
Underground Sea
50%inclusion51 decks102 decks
34%synergy
Verdant Catacombs
48%inclusion49 decks102 decks
38%synergy
Scalding Tarn
46%inclusion47 decks102 decks
36%synergy
Undercity Sewers
43%inclusion44 decks102 decks
28%synergy
Windswept Heath
39%inclusion40 decks102 decks
30%synergy
Vault of Champions
38%inclusion39 decks102 decks
6%synergy
Arid Mesa
37%inclusion38 decks102 decks
28%synergy
Sea of Clouds
34%inclusion35 decks102 decks
-0%synergy
Caves of Koilos
29%inclusion30 decks102 decks
-6%synergy
Underground River
29%inclusion30 decks102 decks
-6%synergy
Adarkar Wastes
29%inclusion30 decks102 decks
-3%synergy
Arcane Sanctum
27%inclusion28 decks102 decks
-27%synergy
Sink into Stupor
26%inclusion27 decks102 decks
13%synergy
Glacial Fortress
25%inclusion25 decks102 decks
-19%synergy
Isolated Chapel
22%inclusion22 decks102 decks
-20%synergy
Drowned Catacomb
21%inclusion21 decks102 decks
-18%synergy
Meticulous Archive
21%inclusion21 decks102 decks
7%synergy
Sunken Hollow
20%inclusion20 decks102 decks
-20%synergy
Raffine's Tower
19%inclusion19 decks102 decks
-22%synergy
Starting Town
18%inclusion10 decks56 decks
14%synergy
Prairie Stream
18%inclusion18 decks102 decks
-23%synergy
Shadowy Backstreet
16%inclusion16 decks102 decks
3%synergy
Contaminated Landscape
16%inclusion16 decks102 decks
2%synergy
Floodfarm Verge
16%inclusion16 decks102 decks
5%synergy
Valgavoth's Lair
15%inclusion15 decks102 decks
12%synergy
Deserted Beach
15%inclusion15 decks102 decks
-6%synergy
Shipwreck Marsh
14%inclusion14 decks102 decks
-7%synergy
Evolving Wilds
14%inclusion14 decks102 decks
-11%synergy
Spire of Industry
13%inclusion13 decks102 decks
5%synergy
Cavern of Souls
13%inclusion13 decks102 decks
6%synergy
Gloomlake Verge
13%inclusion13 decks102 decks
2%synergy
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