The Master of Keys (Commander) - Midrange

The Master of Keys
Rank #301
97decks
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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 Lands
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Exhibition Tidecaller
20%inclusion3 decks15 decks
19%synergy
Eiganjo Dynastorian
7.1%inclusion1 decks14 decks
6%synergy
Turbulent Moor
7.1%inclusion1 decks14 decks
4%synergy
Grave Researcher
6.7%inclusion1 decks15 decks
4%synergy
Killian, Decisive Mentor
4.3%inclusion1 decks23 decks
4%synergy
High Synergy Cards
Necromancy
80%inclusion78 decks97 decks
76%synergy
Animate Dead
80%inclusion78 decks97 decks
71%synergy
Dress Down
70%inclusion68 decks97 decks
68%synergy
Abdel Adrian, Gorion's Ward
60%inclusion58 decks97 decks
58%synergy
Dance of the Dead
58%inclusion56 decks97 decks
56%synergy
Mystic Remora
74%inclusion72 decks97 decks
54%synergy
Entomb
60%inclusion58 decks97 decks
53%synergy
Amphibian Downpour
56%inclusion54 decks97 decks
51%synergy
Tainted Pact
55%inclusion53 decks97 decks
48%synergy
Ripples of Undeath
51%inclusion49 decks97 decks
48%synergy
Top Cards
Dark Ritual
62%inclusion60 decks97 decks
42%synergy
Swords to Plowshares
61%inclusion59 decks97 decks
-7%synergy
Esper Sentinel
58%inclusion56 decks97 decks
31%synergy
Swan Song
57%inclusion55 decks97 decks
37%synergy
Grand Abolisher
56%inclusion54 decks97 decks
41%synergy
Sevinne's Reclamation
55%inclusion53 decks97 decks
46%synergy
Lotho, Corrupt Shirriff
54%inclusion52 decks97 decks
37%synergy
Silence
54%inclusion52 decks97 decks
44%synergy
Mirrormade
53%inclusion51 decks97 decks
43%synergy
Force of Negation
53%inclusion51 decks97 decks
41%synergy
Game Changers
Smothering Tithe
69%inclusion67 decks97 decks
39%synergy
Rhystic Study
64%inclusion62 decks97 decks
33%synergy
Enlightened Tutor
63%inclusion61 decks97 decks
44%synergy
Demonic Tutor
60%inclusion58 decks97 decks
39%synergy
Mana Vault
58%inclusion56 decks97 decks
49%synergy
Thassa's Oracle
57%inclusion55 decks97 decks
48%synergy
Force of Will
57%inclusion55 decks97 decks
44%synergy
Ancient Tomb
56%inclusion54 decks97 decks
43%synergy
Vampiric Tutor
56%inclusion54 decks97 decks
39%synergy
Chrome Mox
55%inclusion53 decks97 decks
46%synergy
Creatures
Orcish Bowmasters
51%inclusion49 decks97 decks
40%synergy
Ranger-Captain of Eos
47%inclusion46 decks97 decks
41%synergy
Valley Floodcaller
45%inclusion44 decks97 decks
42%synergy
Inquisitive Glimmer
34%inclusion33 decks97 decks
27%synergy
Hullbreaker Horror
34%inclusion33 decks97 decks
28%synergy
Displacer Kitten
33%inclusion32 decks97 decks
26%synergy
Opposition Agent
32%inclusion31 decks97 decks
24%synergy
Mesa Enchantress
31%inclusion30 decks97 decks
22%synergy
Entity Tracker
31%inclusion30 decks97 decks
25%synergy
Starfield Mystic
28%inclusion27 decks97 decks
21%synergy
Archivist of Oghma
27%inclusion26 decks97 decks
20%synergy
Mockingbird
27%inclusion26 decks97 decks
22%synergy
Ledger Shredder
27%inclusion26 decks97 decks
18%synergy
Voice of Victory
25%inclusion15 decks59 decks
17%synergy
Lurrus of the Dream-Den
25%inclusion24 decks97 decks
23%synergy
Doomwake Giant
25%inclusion24 decks97 decks
19%synergy
Scrabbling Skullcrab
24%inclusion23 decks97 decks
23%synergy
Demon of Fate's Design
24%inclusion23 decks97 decks
18%synergy
Victor, Valgavoth's Seneschal
22%inclusion21 decks97 decks
20%synergy
Auriok Salvagers
22%inclusion21 decks97 decks
21%synergy
Wan Shi Tong, Librarian
21%inclusion7 decks33 decks
16%synergy
Overlord of the Balemurk
21%inclusion20 decks97 decks
19%synergy
Fear of Sleep Paralysis
21%inclusion20 decks97 decks
16%synergy
Zur, Eternal Schemer
21%inclusion20 decks97 decks
17%synergy
Gravebreaker Lamia
19%inclusion18 decks97 decks
18%synergy
Overlord of the Floodpits
19%inclusion18 decks97 decks
15%synergy
Fear of Impostors
18%inclusion17 decks97 decks
16%synergy
Zur the Enchanter
18%inclusion17 decks97 decks
12%synergy
Enduring Curiosity
16%inclusion16 decks97 decks
8%synergy
Faerie Mastermind
16%inclusion16 decks97 decks
7%synergy
Grim Guardian
16%inclusion16 decks97 decks
14%synergy
Ghostly Dancers
16%inclusion16 decks97 decks
14%synergy
Ondu Spiritdancer
16%inclusion16 decks97 decks
10%synergy
Tataru Taru
16%inclusion8 decks51 decks
7%synergy
Drannith Magistrate
15%inclusion15 decks97 decks
8%synergy
Heliod, the Radiant Dawn
15%inclusion15 decks97 decks
12%synergy
Phyrexian Metamorph
14%inclusion14 decks97 decks
6%synergy
Silent Hallcreeper
14%inclusion14 decks97 decks
10%synergy
Talion, the Kindly Lord
14%inclusion14 decks97 decks
7%synergy
Hedron Crab
13%inclusion13 decks97 decks
13%synergy
Psychic Frog
12%inclusion12 decks97 decks
5%synergy
Ghostly Pilferer
12%inclusion12 decks97 decks
5%synergy
Summon: Yojimbo
12%inclusion6 decks50 decks
11%synergy
Twilight Diviner
12%inclusion3 decks26 decks
10%synergy
Moon-Blessed Cleric
11%inclusion11 decks97 decks
7%synergy
Archon of Sun's Grace
10%inclusion10 decks97 decks
6%synergy
Soaring Lightbringer
10%inclusion10 decks97 decks
6%synergy
Aminatou, Veil Piercer
10%inclusion10 decks97 decks
9%synergy
Alseid of Life's Bounty
10%inclusion10 decks97 decks
9%synergy
Starnheim Courser
9.3%inclusion9 decks97 decks
6%synergy
Instants
Flusterstorm
49%inclusion48 decks97 decks
42%synergy
Mental Misstep
48%inclusion47 decks97 decks
42%synergy
Mindbreak Trap
48%inclusion47 decks97 decks
42%synergy
Demonic Consultation
47%inclusion46 decks97 decks
40%synergy
Pact of Negation
47%inclusion46 decks97 decks
40%synergy
Fierce Guardianship
46%inclusion45 decks97 decks
26%synergy
Intuition
45%inclusion44 decks97 decks
44%synergy
An Offer You Can't Refuse
43%inclusion42 decks97 decks
16%synergy
Borne Upon a Wind
42%inclusion41 decks97 decks
37%synergy
Cyclonic Rift
41%inclusion40 decks97 decks
18%synergy
Mystical Tutor
41%inclusion40 decks97 decks
31%synergy
Cabal Ritual
33%inclusion32 decks97 decks
30%synergy
Sink into Stupor
27%inclusion26 decks97 decks
14%synergy
Mana Drain
26%inclusion25 decks97 decks
8%synergy
Chain of Vapor
25%inclusion24 decks97 decks
22%synergy
Gifts Ungiven
21%inclusion20 decks97 decks
18%synergy
Into the Flood Maw
21%inclusion20 decks97 decks
17%synergy
Counterspell
18%inclusion17 decks97 decks
-24%synergy
Path to Exile
16%inclusion16 decks97 decks
-26%synergy
Dovin's Veto
14%inclusion14 decks97 decks
-12%synergy
Frantic Search
13%inclusion13 decks97 decks
-5%synergy
Retraction Helix
13%inclusion13 decks97 decks
13%synergy
Darkblast
12%inclusion12 decks97 decks
12%synergy
Negate
11%inclusion11 decks97 decks
-5%synergy
Brain Freeze
11%inclusion11 decks97 decks
11%synergy
Arcane Denial
11%inclusion11 decks97 decks
-9%synergy
Muddle the Mixture
10%inclusion10 decks97 decks
7%synergy
Dispel
10%inclusion10 decks97 decks
7%synergy
Culling the Weak
9.3%inclusion9 decks97 decks
8%synergy
Void Rend
9.3%inclusion9 decks97 decks
-25%synergy
Strix Serenade
9.3%inclusion9 decks97 decks
6%synergy
Ad Nauseam
9.3%inclusion9 decks97 decks
7%synergy
Deadly Rollick
7.2%inclusion7 decks97 decks
-8%synergy
Thirst for Meaning
7.2%inclusion7 decks97 decks
6%synergy
Faithful Mending
7.2%inclusion7 decks97 decks
4%synergy
Drown in the Loch
6.2%inclusion6 decks97 decks
4%synergy
Lim-Dûl's Vault
6.2%inclusion6 decks97 decks
3%synergy
Banishing Knack
6.2%inclusion6 decks97 decks
6%synergy
Anguished Unmaking
6.2%inclusion6 decks97 decks
-20%synergy
Otherworldly Gaze
6.2%inclusion6 decks97 decks
4%synergy
Swallowed by Leviathan
6.1%inclusion3 decks49 decks
6%synergy
Dreams of Laguna
6.0%inclusion3 decks50 decks
6%synergy
Teferi's Protection
5.2%inclusion5 decks97 decks
-11%synergy
Orim's Chant
5.2%inclusion5 decks97 decks
3%synergy
Sorceries
Imperial Seal
44%inclusion43 decks97 decks
37%synergy
Reanimate
28%inclusion27 decks97 decks
12%synergy
Windfall
25%inclusion24 decks97 decks
12%synergy
Lively Dirge
18%inclusion17 decks97 decks
16%synergy
Toxic Deluge
18%inclusion17 decks97 decks
-2%synergy
Mnemonic Betrayal
16%inclusion16 decks97 decks
14%synergy
Singularity Rupture
14%inclusion6 decks44 decks
11%synergy
Demonic Counsel
13%inclusion13 decks97 decks
12%synergy
Beseech the Mirror
12%inclusion12 decks97 decks
8%synergy
Redress Fate
11%inclusion11 decks97 decks
6%synergy
Buried Alive
10%inclusion10 decks97 decks
6%synergy
Dance of the Manse
10%inclusion10 decks97 decks
7%synergy
Unmarked Grave
9.3%inclusion9 decks97 decks
8%synergy
Diabolic Intent
8.2%inclusion8 decks97 decks
3%synergy
Yawgmoth's Will
8.2%inclusion8 decks97 decks
7%synergy
Flash Photography
8.1%inclusion3 decks37 decks
7%synergy
Idyllic Tutor
7.2%inclusion7 decks97 decks
3%synergy
Praetor's Grasp
7.2%inclusion7 decks97 decks
4%synergy
Extinguish All Hope
7.2%inclusion7 decks97 decks
6%synergy
Supreme Verdict
6.2%inclusion6 decks97 decks
-8%synergy
Replenish
5.2%inclusion5 decks97 decks
3%synergy
Damn
5.2%inclusion5 decks97 decks
-15%synergy
Utility Artifacts
The One Ring
43%inclusion42 decks97 decks
31%synergy
Wishclaw Talisman
40%inclusion39 decks97 decks
33%synergy
Mesmeric Orb
9.3%inclusion9 decks97 decks
8%synergy
Vexing Bauble
7.2%inclusion7 decks97 decks
5%synergy
Lightning Greaves
6.2%inclusion6 decks97 decks
-17%synergy
Sensei's Divining Top
5.2%inclusion5 decks97 decks
-4%synergy
Enchantments
Blind Obedience
49%inclusion48 decks97 decks
38%synergy
Tinybones Joins Up
45%inclusion44 decks97 decks
44%synergy
Touch the Spirit Realm
38%inclusion37 decks97 decks
36%synergy
The Meathook Massacre
35%inclusion34 decks97 decks
32%synergy
Necropotence
34%inclusion33 decks97 decks
28%synergy
Static Prison
28%inclusion27 decks97 decks
27%synergy
Copy Artifact
26%inclusion25 decks97 decks
25%synergy
Sphere of Safety
24%inclusion23 decks97 decks
14%synergy
Seal of Cleansing
24%inclusion23 decks97 decks
22%synergy
Monologue Tax
24%inclusion23 decks97 decks
17%synergy
Propaganda
23%inclusion22 decks97 decks
-6%synergy
Grasp of Fate
22%inclusion21 decks97 decks
16%synergy
Secret Arcade // Dusty Parlor
21%inclusion20 decks97 decks
16%synergy
Copy Enchantment
19%inclusion18 decks97 decks
14%synergy
Sigil of the Empty Throne
18%inclusion17 decks97 decks
12%synergy
Cemetery Tampering
18%inclusion17 decks97 decks
17%synergy
Seal of Removal
18%inclusion17 decks97 decks
17%synergy
Ghostly Prison
16%inclusion16 decks97 decks
-6%synergy
Estrid's Invocation
14%inclusion14 decks97 decks
10%synergy
Founding the Third Path
13%inclusion13 decks97 decks
13%synergy
Starfield of Nyx
13%inclusion13 decks97 decks
9%synergy
Sheltered by Ghosts
13%inclusion13 decks97 decks
11%synergy
Steal Enchantment
12%inclusion12 decks97 decks
11%synergy
Darksteel Mutation
11%inclusion11 decks97 decks
5%synergy
Counterbalance
11%inclusion11 decks97 decks
10%synergy
Cacophony Unleashed
11%inclusion11 decks97 decks
10%synergy
Ethereal Armor
11%inclusion11 decks97 decks
7%synergy
Greater Auramancy
11%inclusion11 decks97 decks
7%synergy
Trouble in Pairs
11%inclusion11 decks97 decks
6%synergy
All That Glitters
10%inclusion10 decks97 decks
2%synergy
Restricted Office // Lecture Hall
10%inclusion10 decks97 decks
8%synergy
Mirror Room // Fractured Realm
10%inclusion10 decks97 decks
8%synergy
Chains of Mephistopheles
10%inclusion10 decks97 decks
10%synergy
Nowhere to Run
9.3%inclusion9 decks97 decks
8%synergy
Phyrexian Arena
9.3%inclusion9 decks97 decks
-5%synergy
Defiled Crypt // Cadaver Lab
9.3%inclusion9 decks97 decks
9%synergy
The Tale of Tamiyo
8.2%inclusion8 decks97 decks
8%synergy
Black Market Connections
8.2%inclusion8 decks97 decks
-7%synergy
Noggle the Mind
7.7%inclusion2 decks26 decks
7%synergy
Imprisoned in the Moon
7.2%inclusion7 decks97 decks
0%synergy
Authority of the Consuls
7.2%inclusion7 decks97 decks
-6%synergy
Shark Typhoon
7.2%inclusion7 decks97 decks
1%synergy
Leyline of Anticipation
7.2%inclusion7 decks97 decks
3%synergy
Bottomless Pool // Locker Room
7.2%inclusion7 decks97 decks
5%synergy
Polluted Cistern // Dim Oubliette
7.2%inclusion7 decks97 decks
7%synergy
Stillness in Motion
7.0%inclusion4 decks57 decks
7%synergy
Teval's Judgment
6.8%inclusion4 decks59 decks
6%synergy
Cramped Vents // Access Maze
6.2%inclusion6 decks97 decks
4%synergy
Unable to Scream
6.2%inclusion6 decks97 decks
5%synergy
Timely Ward
6.2%inclusion6 decks97 decks
1%synergy
Planeswalkers
Teferi, Time Raveler
25%inclusion24 decks97 decks
17%synergy
Utility Lands
Otawara, Soaring City
53%inclusion51 decks97 decks
34%synergy
Hall of Heliod's Generosity
27%inclusion26 decks97 decks
14%synergy
Urza's Saga
25%inclusion24 decks97 decks
13%synergy
Emergence Zone
20%inclusion19 decks97 decks
18%synergy
Cephalid Coliseum
19%inclusion18 decks97 decks
15%synergy
Bojuka Bog
16%inclusion16 decks97 decks
-10%synergy
Minamo, School at Water's Edge
12%inclusion12 decks97 decks
9%synergy
Serra's Sanctum
12%inclusion12 decks97 decks
11%synergy
City of Traitors
10%inclusion10 decks97 decks
9%synergy
Ishgard, the Holy See
10%inclusion5 decks51 decks
6%synergy
Adagia, Windswept Bastion
6.8%inclusion3 decks44 decks
4%synergy
Urborg, Tomb of Yawgmoth
6.2%inclusion6 decks97 decks
-7%synergy
Mana Artifacts
Sol Ring
96%inclusion93 decks97 decks
6%synergy
Arcane Signet
94%inclusion91 decks97 decks
6%synergy
Talisman of Dominance
73%inclusion71 decks97 decks
23%synergy
Fellwar Stone
60%inclusion58 decks97 decks
27%synergy
Talisman of Progress
58%inclusion56 decks97 decks
14%synergy
Lotus Petal
56%inclusion54 decks97 decks
45%synergy
Mox Diamond
52%inclusion50 decks97 decks
45%synergy
Mox Opal
49%inclusion48 decks97 decks
41%synergy
Talisman of Hierarchy
46%inclusion45 decks97 decks
2%synergy
Lion's Eye Diamond
37%inclusion36 decks97 decks
35%synergy
Mox Amber
22%inclusion21 decks97 decks
16%synergy
Grim Monolith
21%inclusion20 decks97 decks
17%synergy
Orzhov Signet
18%inclusion17 decks97 decks
-14%synergy
Azorius Signet
18%inclusion17 decks97 decks
-12%synergy
Dimir Signet
13%inclusion13 decks97 decks
-17%synergy
Mind Stone
7.2%inclusion7 decks97 decks
-5%synergy
Lands
Command Tower
96%inclusion93 decks97 decks
3%synergy
Watery Grave
75%inclusion73 decks97 decks
24%synergy
Polluted Delta
73%inclusion71 decks97 decks
35%synergy
Flooded Strand
71%inclusion69 decks97 decks
33%synergy
Exotic Orchard
70%inclusion68 decks97 decks
11%synergy
Godless Shrine
70%inclusion68 decks97 decks
18%synergy
Hallowed Fountain
70%inclusion68 decks97 decks
19%synergy
Marsh Flats
68%inclusion66 decks97 decks
32%synergy
Island
66%inclusion64 decks97 decks
-27%synergy
Swamp
62%inclusion60 decks97 decks
-30%synergy
City of Brass
57%inclusion55 decks97 decks
42%synergy
Plains
56%inclusion54 decks97 decks
-36%synergy
Mana Confluence
56%inclusion54 decks97 decks
42%synergy
Gemstone Caverns
54%inclusion52 decks97 decks
46%synergy
Tundra
52%inclusion50 decks97 decks
36%synergy
Misty Rainforest
52%inclusion50 decks97 decks
41%synergy
Morphic Pool
52%inclusion50 decks97 decks
18%synergy
Scrubland
52%inclusion50 decks97 decks
36%synergy
Bloodstained Mire
52%inclusion50 decks97 decks
41%synergy
Underground Sea
51%inclusion49 decks97 decks
35%synergy
Verdant Catacombs
48%inclusion47 decks97 decks
39%synergy
Scalding Tarn
46%inclusion45 decks97 decks
36%synergy
Undercity Sewers
43%inclusion42 decks97 decks
29%synergy
Windswept Heath
40%inclusion39 decks97 decks
31%synergy
Vault of Champions
37%inclusion36 decks97 decks
5%synergy
Arid Mesa
36%inclusion35 decks97 decks
27%synergy
Sea of Clouds
34%inclusion33 decks97 decks
-1%synergy
Caves of Koilos
29%inclusion28 decks97 decks
-7%synergy
Underground River
29%inclusion28 decks97 decks
-6%synergy
Adarkar Wastes
29%inclusion28 decks97 decks
-3%synergy
Arcane Sanctum
28%inclusion27 decks97 decks
-26%synergy
Sink into Stupor
27%inclusion26 decks97 decks
14%synergy
Glacial Fortress
25%inclusion24 decks97 decks
-18%synergy
Isolated Chapel
21%inclusion20 decks97 decks
-21%synergy
Meticulous Archive
21%inclusion20 decks97 decks
7%synergy
Drowned Catacomb
20%inclusion19 decks97 decks
-19%synergy
Sunken Hollow
20%inclusion19 decks97 decks
-20%synergy
Raffine's Tower
19%inclusion18 decks97 decks
-22%synergy
Prairie Stream
18%inclusion17 decks97 decks
-23%synergy
Shadowy Backstreet
16%inclusion16 decks97 decks
4%synergy
Starting Town
16%inclusion8 decks51 decks
12%synergy
Contaminated Landscape
15%inclusion15 decks97 decks
2%synergy
Valgavoth's Lair
15%inclusion15 decks97 decks
13%synergy
Deserted Beach
14%inclusion14 decks97 decks
-6%synergy
Floodfarm Verge
14%inclusion14 decks97 decks
3%synergy
Spire of Industry
13%inclusion13 decks97 decks
6%synergy
Cavern of Souls
13%inclusion13 decks97 decks
7%synergy
Temple of Deceit
12%inclusion12 decks97 decks
-5%synergy
Shipwreck Marsh
12%inclusion12 decks97 decks
-8%synergy
Evolving Wilds
12%inclusion12 decks97 decks
-12%synergy
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