The Master of Keys (Commander) - Expensive Midrange

The Master of Keys
Rank #301
9decks
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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
50%inclusion1 decks2 decks
49%synergy
High Synergy Cards
Dress Down
100%inclusion9 decks9 decks
98%synergy
Necromancy
100%inclusion9 decks9 decks
95%synergy
Tainted Pact
100%inclusion9 decks9 decks
93%synergy
Force of Negation
100%inclusion9 decks9 decks
88%synergy
Mental Misstep
89%inclusion8 decks9 decks
82%synergy
Mindbreak Trap
89%inclusion8 decks9 decks
82%synergy
Entomb
89%inclusion8 decks9 decks
82%synergy
Demonic Consultation
89%inclusion8 decks9 decks
81%synergy
Otawara, Soaring City
100%inclusion9 decks9 decks
81%synergy
Dark Ritual
100%inclusion9 decks9 decks
80%synergy
Top Cards
Esper Sentinel
100%inclusion9 decks9 decks
73%synergy
Mystic Remora
100%inclusion9 decks9 decks
79%synergy
Lotho, Corrupt Shirriff
89%inclusion8 decks9 decks
72%synergy
Rhystic Study
89%inclusion8 decks9 decks
58%synergy
Silence
89%inclusion8 decks9 decks
79%synergy
Swan Song
89%inclusion8 decks9 decks
69%synergy
Animate Dead
89%inclusion8 decks9 decks
79%synergy
Grand Abolisher
89%inclusion8 decks9 decks
74%synergy
Dance of the Dead
78%inclusion7 decks9 decks
76%synergy
Imperial Seal
78%inclusion7 decks9 decks
71%synergy
Game Changers
Smothering Tithe
100%inclusion9 decks9 decks
70%synergy
Thassa's Oracle
100%inclusion9 decks9 decks
91%synergy
Ancient Tomb
100%inclusion9 decks9 decks
88%synergy
Intuition
100%inclusion9 decks9 decks
98%synergy
Mana Vault
100%inclusion9 decks9 decks
91%synergy
Demonic Tutor
100%inclusion9 decks9 decks
80%synergy
Force of Will
100%inclusion9 decks9 decks
88%synergy
Enlightened Tutor
100%inclusion9 decks9 decks
81%synergy
Chrome Mox
100%inclusion9 decks9 decks
91%synergy
Vampiric Tutor
100%inclusion9 decks9 decks
83%synergy
Creatures
Valley Floodcaller
78%inclusion7 decks9 decks
74%synergy
Abdel Adrian, Gorion's Ward
78%inclusion7 decks9 decks
76%synergy
Ranger-Captain of Eos
78%inclusion7 decks9 decks
72%synergy
Orcish Bowmasters
78%inclusion7 decks9 decks
68%synergy
Mockingbird
67%inclusion6 decks9 decks
62%synergy
Hullbreaker Horror
56%inclusion5 decks9 decks
50%synergy
Gran-Gran
50%inclusion1 decks2 decks
50%synergy
Wan Shi Tong, Librarian
50%inclusion1 decks2 decks
45%synergy
Displacer Kitten
44%inclusion4 decks9 decks
38%synergy
Opposition Agent
44%inclusion4 decks9 decks
36%synergy
Phyrexian Metamorph
44%inclusion4 decks9 decks
36%synergy
Voice of Victory
40%inclusion2 decks5 decks
32%synergy
Tataru Taru
40%inclusion2 decks5 decks
32%synergy
Archivist of Oghma
33%inclusion3 decks9 decks
27%synergy
Lurrus of the Dream-Den
33%inclusion3 decks9 decks
32%synergy
Faerie Mastermind
33%inclusion3 decks9 decks
24%synergy
Auriok Salvagers
33%inclusion3 decks9 decks
33%synergy
Ledger Shredder
33%inclusion3 decks9 decks
25%synergy
Ghostly Pilferer
33%inclusion3 decks9 decks
26%synergy
Volatile Stormdrake
22%inclusion2 decks9 decks
21%synergy
High Fae Trickster
22%inclusion2 decks9 decks
18%synergy
Snapcaster Mage
22%inclusion2 decks9 decks
20%synergy
Hedron Crab
22%inclusion2 decks9 decks
22%synergy
Drannith Magistrate
22%inclusion2 decks9 decks
15%synergy
Scrabbling Skullcrab
11%inclusion1 decks9 decks
10%synergy
Hoarding Broodlord
11%inclusion1 decks9 decks
9%synergy
Bruvac the Grandiloquent
11%inclusion1 decks9 decks
10%synergy
Starfield Mystic
11%inclusion1 decks9 decks
5%synergy
Tishana's Tidebinder
11%inclusion1 decks9 decks
10%synergy
Gravebreaker Lamia
11%inclusion1 decks9 decks
10%synergy
Consecrated Sphinx
11%inclusion1 decks9 decks
5%synergy
Subtlety
11%inclusion1 decks9 decks
11%synergy
Spellseeker
11%inclusion1 decks9 decks
10%synergy
Malevolent Hermit
11%inclusion1 decks9 decks
10%synergy
Drana and Linvala
11%inclusion1 decks9 decks
9%synergy
Gilded Drake
11%inclusion1 decks9 decks
10%synergy
Mesa Enchantress
11%inclusion1 decks9 decks
2%synergy
Fear of Sleep Paralysis
11%inclusion1 decks9 decks
6%synergy
Doomwake Giant
11%inclusion1 decks9 decks
5%synergy
Nezahal, Primal Tide
11%inclusion1 decks9 decks
7%synergy
Entity Tracker
11%inclusion1 decks9 decks
5%synergy
Ondu Spiritdancer
11%inclusion1 decks9 decks
5%synergy
Clever Impersonator
11%inclusion1 decks9 decks
9%synergy
Psychic Frog
11%inclusion1 decks9 decks
4%synergy
Academy Rector
11%inclusion1 decks9 decks
10%synergy
Instants
Flusterstorm
78%inclusion7 decks9 decks
70%synergy
Pact of Negation
78%inclusion7 decks9 decks
70%synergy
Fierce Guardianship
67%inclusion6 decks9 decks
46%synergy
Cabal Ritual
56%inclusion5 decks9 decks
52%synergy
Swords to Plowshares
56%inclusion5 decks9 decks
-12%synergy
Borne Upon a Wind
56%inclusion5 decks9 decks
51%synergy
Cyclonic Rift
56%inclusion5 decks9 decks
33%synergy
An Offer You Can't Refuse
44%inclusion4 decks9 decks
17%synergy
Retraction Helix
44%inclusion4 decks9 decks
44%synergy
Brain Freeze
44%inclusion4 decks9 decks
44%synergy
Mystical Tutor
44%inclusion4 decks9 decks
34%synergy
Chain of Vapor
33%inclusion3 decks9 decks
30%synergy
Gifts Ungiven
33%inclusion3 decks9 decks
31%synergy
Darkblast
33%inclusion3 decks9 decks
33%synergy
Banishing Knack
33%inclusion3 decks9 decks
33%synergy
Ad Nauseam
33%inclusion3 decks9 decks
31%synergy
Culling the Weak
22%inclusion2 decks9 decks
21%synergy
Dispel
22%inclusion2 decks9 decks
19%synergy
Into the Flood Maw
22%inclusion2 decks9 decks
19%synergy
Sink into Stupor
22%inclusion2 decks9 decks
9%synergy
Deadly Rollick
11%inclusion1 decks9 decks
-4%synergy
Sacrifice
11%inclusion1 decks9 decks
10%synergy
Ephemerate
11%inclusion1 decks9 decks
7%synergy
Orim's Chant
11%inclusion1 decks9 decks
9%synergy
Flare of Denial
11%inclusion1 decks9 decks
9%synergy
Mana Drain
11%inclusion1 decks9 decks
-6%synergy
Strix Serenade
11%inclusion1 decks9 decks
8%synergy
Commandeer
11%inclusion1 decks9 decks
10%synergy
Misdirection
11%inclusion1 decks9 decks
9%synergy
Path to Exile
11%inclusion1 decks9 decks
-31%synergy
Miscast
11%inclusion1 decks9 decks
10%synergy
Snapback
11%inclusion1 decks9 decks
11%synergy
Saw in Half
11%inclusion1 decks9 decks
9%synergy
Sorceries
Sevinne's Reclamation
67%inclusion6 decks9 decks
58%synergy
Reanimate
56%inclusion5 decks9 decks
39%synergy
Flash Photography
50%inclusion1 decks2 decks
49%synergy
Windfall
33%inclusion3 decks9 decks
20%synergy
Lively Dirge
33%inclusion3 decks9 decks
32%synergy
Yawgmoth's Will
33%inclusion3 decks9 decks
32%synergy
Timetwister
33%inclusion3 decks9 decks
32%synergy
Singularity Rupture
25%inclusion1 decks4 decks
23%synergy
Unmarked Grave
22%inclusion2 decks9 decks
21%synergy
Demonic Counsel
22%inclusion2 decks9 decks
21%synergy
Mnemonic Betrayal
22%inclusion2 decks9 decks
19%synergy
Toxic Deluge
22%inclusion2 decks9 decks
3%synergy
Beseech the Mirror
22%inclusion2 decks9 decks
18%synergy
Diabolic Intent
11%inclusion1 decks9 decks
6%synergy
Gitaxian Probe
11%inclusion1 decks9 decks
9%synergy
Idyllic Tutor
11%inclusion1 decks9 decks
7%synergy
Praetor's Grasp
11%inclusion1 decks9 decks
8%synergy
Dark Deal
11%inclusion1 decks9 decks
10%synergy
Maddening Cacophony
11%inclusion1 decks9 decks
10%synergy
Utility Artifacts
The One Ring
67%inclusion6 decks9 decks
54%synergy
Wishclaw Talisman
44%inclusion4 decks9 decks
37%synergy
Vexing Bauble
33%inclusion3 decks9 decks
32%synergy
Agatha's Soul Cauldron
11%inclusion1 decks9 decks
11%synergy
Swiftfoot Boots
11%inclusion1 decks9 decks
-13%synergy
Imposter Mech
11%inclusion1 decks9 decks
9%synergy
Enchantments
Tinybones Joins Up
67%inclusion6 decks9 decks
66%synergy
Amphibian Downpour
67%inclusion6 decks9 decks
62%synergy
Chains of Mephistopheles
67%inclusion6 decks9 decks
66%synergy
Mirrormade
56%inclusion5 decks9 decks
46%synergy
Copy Artifact
56%inclusion5 decks9 decks
55%synergy
Steal Enchantment
44%inclusion4 decks9 decks
44%synergy
Blind Obedience
44%inclusion4 decks9 decks
33%synergy
Static Prison
44%inclusion4 decks9 decks
44%synergy
Counterbalance
33%inclusion3 decks9 decks
32%synergy
Founding the Third Path
33%inclusion3 decks9 decks
33%synergy
The Meathook Massacre
33%inclusion3 decks9 decks
30%synergy
Touch the Spirit Realm
33%inclusion3 decks9 decks
31%synergy
Necropotence
33%inclusion3 decks9 decks
27%synergy
Copy Enchantment
22%inclusion2 decks9 decks
17%synergy
Seal of Cleansing
22%inclusion2 decks9 decks
21%synergy
Monologue Tax
22%inclusion2 decks9 decks
16%synergy
Trouble in Pairs
22%inclusion2 decks9 decks
17%synergy
Teval's Judgment
20%inclusion1 decks5 decks
19%synergy
Waste Not
11%inclusion1 decks9 decks
11%synergy
Ripples of Undeath
11%inclusion1 decks9 decks
8%synergy
Curse of Silence
11%inclusion1 decks9 decks
11%synergy
Attunement
11%inclusion1 decks9 decks
11%synergy
Omniscience
11%inclusion1 decks9 decks
7%synergy
Kismet
11%inclusion1 decks9 decks
11%synergy
Charitable Levy
11%inclusion1 decks9 decks
11%synergy
Starfield of Nyx
11%inclusion1 decks9 decks
7%synergy
Sphere of Safety
11%inclusion1 decks9 decks
2%synergy
Power Artifact
11%inclusion1 decks9 decks
11%synergy
Leyline of Anticipation
11%inclusion1 decks9 decks
7%synergy
Spreading Seas
11%inclusion1 decks9 decks
11%synergy
Mind Harness
11%inclusion1 decks9 decks
11%synergy
Secret Arcade // Dusty Parlor
11%inclusion1 decks9 decks
7%synergy
Black Market Connections
11%inclusion1 decks9 decks
-4%synergy
Seal of Removal
11%inclusion1 decks9 decks
11%synergy
Leyline of the Void
11%inclusion1 decks9 decks
10%synergy
Planeswalkers
Teferi, Time Raveler
33%inclusion3 decks9 decks
25%synergy
Tezzeret, Cruel Captain
25%inclusion1 decks4 decks
23%synergy
Utility Lands
Urza's Saga
44%inclusion4 decks9 decks
33%synergy
Cephalid Coliseum
33%inclusion3 decks9 decks
30%synergy
City of Traitors
33%inclusion3 decks9 decks
32%synergy
Serra's Sanctum
22%inclusion2 decks9 decks
21%synergy
Emergence Zone
22%inclusion2 decks9 decks
20%synergy
Wasteland
11%inclusion1 decks9 decks
10%synergy
Phyrexian Tower
11%inclusion1 decks9 decks
8%synergy
Hall of Heliod's Generosity
11%inclusion1 decks9 decks
-2%synergy
Cabal Coffers
11%inclusion1 decks9 decks
8%synergy
Strip Mine
11%inclusion1 decks9 decks
10%synergy
Urborg, Tomb of Yawgmoth
11%inclusion1 decks9 decks
-2%synergy
Saprazzan Skerry
11%inclusion1 decks9 decks
11%synergy
Mana Artifacts
Arcane Signet
100%inclusion9 decks9 decks
12%synergy
Sol Ring
100%inclusion9 decks9 decks
10%synergy
Mox Diamond
100%inclusion9 decks9 decks
93%synergy
Lotus Petal
89%inclusion8 decks9 decks
79%synergy
Grim Monolith
78%inclusion7 decks9 decks
74%synergy
Mox Opal
67%inclusion6 decks9 decks
58%synergy
Lion's Eye Diamond
67%inclusion6 decks9 decks
65%synergy
Talisman of Progress
56%inclusion5 decks9 decks
11%synergy
Fellwar Stone
56%inclusion5 decks9 decks
22%synergy
Talisman of Dominance
44%inclusion4 decks9 decks
-6%synergy
Mox Amber
33%inclusion3 decks9 decks
27%synergy
Relic of Legends
11%inclusion1 decks9 decks
4%synergy
Talisman of Hierarchy
11%inclusion1 decks9 decks
-33%synergy
Springleaf Drum
11%inclusion1 decks9 decks
9%synergy
Lands
Tundra
100%inclusion9 decks9 decks
84%synergy
Command Tower
100%inclusion9 decks9 decks
7%synergy
Underground Sea
100%inclusion9 decks9 decks
84%synergy
Godless Shrine
100%inclusion9 decks9 decks
48%synergy
Gemstone Caverns
100%inclusion9 decks9 decks
93%synergy
Scrubland
100%inclusion9 decks9 decks
84%synergy
Mana Confluence
100%inclusion9 decks9 decks
86%synergy
Marsh Flats
100%inclusion9 decks9 decks
64%synergy
Polluted Delta
100%inclusion9 decks9 decks
62%synergy
City of Brass
100%inclusion9 decks9 decks
85%synergy
Flooded Strand
100%inclusion9 decks9 decks
62%synergy
Watery Grave
100%inclusion9 decks9 decks
49%synergy
Hallowed Fountain
89%inclusion8 decks9 decks
38%synergy
Bloodstained Mire
89%inclusion8 decks9 decks
78%synergy
Misty Rainforest
78%inclusion7 decks9 decks
67%synergy
Morphic Pool
78%inclusion7 decks9 decks
44%synergy
Scalding Tarn
78%inclusion7 decks9 decks
67%synergy
Windswept Heath
67%inclusion6 decks9 decks
57%synergy
Verdant Catacombs
67%inclusion6 decks9 decks
57%synergy
Arid Mesa
67%inclusion6 decks9 decks
57%synergy
Undercity Sewers
56%inclusion5 decks9 decks
41%synergy
Exotic Orchard
44%inclusion4 decks9 decks
-14%synergy
Vault of Champions
44%inclusion4 decks9 decks
12%synergy
Starting Town
40%inclusion2 decks5 decks
36%synergy
Sea of Clouds
33%inclusion3 decks9 decks
-2%synergy
Meticulous Archive
33%inclusion3 decks9 decks
19%synergy
Shadowy Backstreet
22%inclusion2 decks9 decks
10%synergy
Tarnished Citadel
22%inclusion2 decks9 decks
21%synergy
Cavern of Souls
22%inclusion2 decks9 decks
16%synergy
Sink into Stupor
22%inclusion2 decks9 decks
9%synergy
Gemstone Mine
11%inclusion1 decks9 decks
11%synergy
Swamp
11%inclusion1 decks9 decks
-81%synergy
Valgavoth's Lair
11%inclusion1 decks9 decks
9%synergy
Raffine's Tower
11%inclusion1 decks9 decks
-30%synergy
Island
11%inclusion1 decks9 decks
-82%synergy
Plains
11%inclusion1 decks9 decks
-81%synergy
Gloomlake Verge
11%inclusion1 decks9 decks
0%synergy
Floodfarm Verge
11%inclusion1 decks9 decks
0%synergy
Silent Clearing
11%inclusion1 decks9 decks
9%synergy
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