The Master of Keys (Commander) - Expensive cEDH Mill

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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Utility Lands
Mana Artifacts
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Abdel Adrian, Gorion's Ward
100%inclusion4 decks4 decks
98%synergy
Dance of the Dead
100%inclusion4 decks4 decks
98%synergy
Amphibian Downpour
100%inclusion4 decks4 decks
95%synergy
Necromancy
100%inclusion4 decks4 decks
95%synergy
Tainted Pact
100%inclusion4 decks4 decks
92%synergy
Demonic Consultation
100%inclusion4 decks4 decks
91%synergy
Sevinne's Reclamation
100%inclusion4 decks4 decks
91%synergy
Animate Dead
100%inclusion4 decks4 decks
90%synergy
Silence
100%inclusion4 decks4 decks
90%synergy
Force of Negation
100%inclusion4 decks4 decks
88%synergy
Top Cards
Dark Ritual
100%inclusion4 decks4 decks
81%synergy
Esper Sentinel
100%inclusion4 decks4 decks
72%synergy
Mystic Remora
100%inclusion4 decks4 decks
78%synergy
Swan Song
100%inclusion4 decks4 decks
81%synergy
Game Changers
Smothering Tithe
100%inclusion4 decks4 decks
67%synergy
Thassa's Oracle
100%inclusion4 decks4 decks
90%synergy
Ancient Tomb
100%inclusion4 decks4 decks
87%synergy
Mana Vault
100%inclusion4 decks4 decks
90%synergy
Demonic Tutor
100%inclusion4 decks4 decks
78%synergy
Force of Will
100%inclusion4 decks4 decks
87%synergy
Enlightened Tutor
100%inclusion4 decks4 decks
80%synergy
Chrome Mox
100%inclusion4 decks4 decks
90%synergy
Vampiric Tutor
100%inclusion4 decks4 decks
82%synergy
Mox Diamond
100%inclusion4 decks4 decks
93%synergy
Creatures
Lotho, Corrupt Shirriff
75%inclusion3 decks4 decks
58%synergy
Hedron Crab
75%inclusion3 decks4 decks
74%synergy
Grand Abolisher
75%inclusion3 decks4 decks
61%synergy
Ranger-Captain of Eos
75%inclusion3 decks4 decks
68%synergy
Ghostly Pilferer
75%inclusion3 decks4 decks
68%synergy
Snapcaster Mage
50%inclusion2 decks4 decks
48%synergy
Valley Floodcaller
50%inclusion2 decks4 decks
46%synergy
Voice of Victory
50%inclusion2 decks4 decks
42%synergy
Orcish Bowmasters
50%inclusion2 decks4 decks
39%synergy
Tataru Taru
50%inclusion2 decks4 decks
42%synergy
Archivist of Oghma
25%inclusion1 decks4 decks
18%synergy
Scrabbling Skullcrab
25%inclusion1 decks4 decks
24%synergy
Opposition Agent
25%inclusion1 decks4 decks
16%synergy
Bruvac the Grandiloquent
25%inclusion1 decks4 decks
24%synergy
Starfield Mystic
25%inclusion1 decks4 decks
18%synergy
Tishana's Tidebinder
25%inclusion1 decks4 decks
24%synergy
Gravebreaker Lamia
25%inclusion1 decks4 decks
24%synergy
Consecrated Sphinx
25%inclusion1 decks4 decks
19%synergy
Phyrexian Metamorph
25%inclusion1 decks4 decks
16%synergy
Lurrus of the Dream-Den
25%inclusion1 decks4 decks
23%synergy
Inquisitive Glimmer
25%inclusion1 decks4 decks
17%synergy
Malevolent Hermit
25%inclusion1 decks4 decks
24%synergy
Stitcher's Supplier
25%inclusion1 decks4 decks
24%synergy
Mesa Enchantress
25%inclusion1 decks4 decks
16%synergy
Fear of Sleep Paralysis
25%inclusion1 decks4 decks
19%synergy
Faerie Mastermind
25%inclusion1 decks4 decks
16%synergy
Drannith Magistrate
25%inclusion1 decks4 decks
17%synergy
Mockingbird
25%inclusion1 decks4 decks
21%synergy
Doomwake Giant
25%inclusion1 decks4 decks
19%synergy
Entity Tracker
25%inclusion1 decks4 decks
18%synergy
Ondu Spiritdancer
25%inclusion1 decks4 decks
19%synergy
Hullbreaker Horror
25%inclusion1 decks4 decks
19%synergy
Greedy Freebooter
25%inclusion1 decks4 decks
25%synergy
Priest of Gix
25%inclusion1 decks4 decks
25%synergy
Auriok Salvagers
25%inclusion1 decks4 decks
25%synergy
Symbiote Spider-Man
25%inclusion1 decks4 decks
24%synergy
Instants
Entomb
75%inclusion3 decks4 decks
68%synergy
Intuition
75%inclusion3 decks4 decks
73%synergy
Mindbreak Trap
75%inclusion3 decks4 decks
68%synergy
Gifts Ungiven
75%inclusion3 decks4 decks
73%synergy
Darkblast
75%inclusion3 decks4 decks
75%synergy
Flusterstorm
75%inclusion3 decks4 decks
67%synergy
Swords to Plowshares
75%inclusion3 decks4 decks
7%synergy
Borne Upon a Wind
75%inclusion3 decks4 decks
70%synergy
Fierce Guardianship
75%inclusion3 decks4 decks
54%synergy
Pact of Negation
75%inclusion3 decks4 decks
67%synergy
Mystical Tutor
75%inclusion3 decks4 decks
63%synergy
Mental Misstep
50%inclusion2 decks4 decks
43%synergy
Brain Freeze
50%inclusion2 decks4 decks
49%synergy
Cabal Ritual
50%inclusion2 decks4 decks
47%synergy
Ad Nauseam
50%inclusion2 decks4 decks
47%synergy
Cyclonic Rift
50%inclusion2 decks4 decks
25%synergy
Deadly Rollick
25%inclusion1 decks4 decks
11%synergy
An Offer You Can't Refuse
25%inclusion1 decks4 decks
-1%synergy
Retraction Helix
25%inclusion1 decks4 decks
24%synergy
Banishing Knack
25%inclusion1 decks4 decks
25%synergy
Mana Drain
25%inclusion1 decks4 decks
7%synergy
Strix Serenade
25%inclusion1 decks4 decks
21%synergy
Into the Flood Maw
25%inclusion1 decks4 decks
21%synergy
Sink into Stupor
25%inclusion1 decks4 decks
13%synergy
Spell Pierce
25%inclusion1 decks4 decks
22%synergy
Path to Exile
25%inclusion1 decks4 decks
-17%synergy
Sorceries
Imperial Seal
75%inclusion3 decks4 decks
67%synergy
Reanimate
75%inclusion3 decks4 decks
59%synergy
Diabolic Intent
25%inclusion1 decks4 decks
20%synergy
Windfall
25%inclusion1 decks4 decks
11%synergy
Lively Dirge
25%inclusion1 decks4 decks
24%synergy
Unmarked Grave
25%inclusion1 decks4 decks
24%synergy
Glimpse the Unthinkable
25%inclusion1 decks4 decks
25%synergy
Idyllic Tutor
25%inclusion1 decks4 decks
21%synergy
Demonic Counsel
25%inclusion1 decks4 decks
24%synergy
Toxic Deluge
25%inclusion1 decks4 decks
6%synergy
Timetwister
25%inclusion1 decks4 decks
24%synergy
Maddening Cacophony
25%inclusion1 decks4 decks
24%synergy
Singularity Rupture
25%inclusion1 decks4 decks
23%synergy
Space-Time Anomaly
25%inclusion1 decks4 decks
23%synergy
Utility Artifacts
The One Ring
75%inclusion3 decks4 decks
61%synergy
Vexing Bauble
25%inclusion1 decks4 decks
23%synergy
Wishclaw Talisman
25%inclusion1 decks4 decks
17%synergy
Swiftfoot Boots
25%inclusion1 decks4 decks
1%synergy
Enchantments
Founding the Third Path
75%inclusion3 decks4 decks
75%synergy
Tinybones Joins Up
75%inclusion3 decks4 decks
74%synergy
Rhystic Study
75%inclusion3 decks4 decks
42%synergy
Dress Down
75%inclusion3 decks4 decks
72%synergy
Chains of Mephistopheles
75%inclusion3 decks4 decks
75%synergy
The Meathook Massacre
50%inclusion2 decks4 decks
46%synergy
Ripples of Undeath
50%inclusion2 decks4 decks
47%synergy
Mirrormade
50%inclusion2 decks4 decks
40%synergy
Copy Artifact
50%inclusion2 decks4 decks
49%synergy
Necropotence
50%inclusion2 decks4 decks
43%synergy
Static Prison
50%inclusion2 decks4 decks
49%synergy
Counterbalance
25%inclusion1 decks4 decks
23%synergy
Verity Circle
25%inclusion1 decks4 decks
24%synergy
Steal Enchantment
25%inclusion1 decks4 decks
24%synergy
Blind Obedience
25%inclusion1 decks4 decks
12%synergy
Teval's Judgment
25%inclusion1 decks4 decks
24%synergy
Dance of Many
25%inclusion1 decks4 decks
25%synergy
Starfield of Nyx
25%inclusion1 decks4 decks
21%synergy
Sphere of Safety
25%inclusion1 decks4 decks
16%synergy
Seal of Cleansing
25%inclusion1 decks4 decks
23%synergy
Chthonian Nightmare
25%inclusion1 decks4 decks
24%synergy
Secret Arcade // Dusty Parlor
25%inclusion1 decks4 decks
20%synergy
Black Market Connections
25%inclusion1 decks4 decks
11%synergy
Seal of Removal
25%inclusion1 decks4 decks
24%synergy
Planeswalkers
Tezzeret, Cruel Captain
25%inclusion1 decks4 decks
23%synergy
Utility Lands
Otawara, Soaring City
100%inclusion4 decks4 decks
81%synergy
Serra's Sanctum
75%inclusion3 decks4 decks
73%synergy
Urza's Saga
50%inclusion2 decks4 decks
38%synergy
Hall of Heliod's Generosity
25%inclusion1 decks4 decks
12%synergy
Cabal Coffers
25%inclusion1 decks4 decks
22%synergy
Emergence Zone
25%inclusion1 decks4 decks
23%synergy
Cephalid Coliseum
25%inclusion1 decks4 decks
21%synergy
Urborg, Tomb of Yawgmoth
25%inclusion1 decks4 decks
12%synergy
Mana Artifacts
Arcane Signet
100%inclusion4 decks4 decks
12%synergy
Sol Ring
100%inclusion4 decks4 decks
10%synergy
Lotus Petal
75%inclusion3 decks4 decks
64%synergy
Talisman of Dominance
75%inclusion3 decks4 decks
26%synergy
Mox Opal
75%inclusion3 decks4 decks
66%synergy
Lion's Eye Diamond
75%inclusion3 decks4 decks
73%synergy
Grim Monolith
50%inclusion2 decks4 decks
46%synergy
Mox Amber
50%inclusion2 decks4 decks
44%synergy
Fellwar Stone
50%inclusion2 decks4 decks
16%synergy
Talisman of Hierarchy
50%inclusion2 decks4 decks
7%synergy
Talisman of Progress
25%inclusion1 decks4 decks
-18%synergy
Lands
Tundra
100%inclusion4 decks4 decks
84%synergy
Command Tower
100%inclusion4 decks4 decks
8%synergy
Underground Sea
100%inclusion4 decks4 decks
84%synergy
Godless Shrine
100%inclusion4 decks4 decks
50%synergy
Gemstone Caverns
100%inclusion4 decks4 decks
92%synergy
Scrubland
100%inclusion4 decks4 decks
84%synergy
Marsh Flats
100%inclusion4 decks4 decks
64%synergy
Polluted Delta
100%inclusion4 decks4 decks
63%synergy
Hallowed Fountain
100%inclusion4 decks4 decks
51%synergy
City of Brass
100%inclusion4 decks4 decks
85%synergy
Flooded Strand
100%inclusion4 decks4 decks
62%synergy
Watery Grave
100%inclusion4 decks4 decks
51%synergy
Morphic Pool
75%inclusion3 decks4 decks
41%synergy
Arid Mesa
75%inclusion3 decks4 decks
65%synergy
Mana Confluence
75%inclusion3 decks4 decks
61%synergy
Bloodstained Mire
75%inclusion3 decks4 decks
64%synergy
Undercity Sewers
50%inclusion2 decks4 decks
36%synergy
Misty Rainforest
50%inclusion2 decks4 decks
39%synergy
Exotic Orchard
50%inclusion2 decks4 decks
-8%synergy
Windswept Heath
50%inclusion2 decks4 decks
40%synergy
Verdant Catacombs
50%inclusion2 decks4 decks
40%synergy
Cavern of Souls
50%inclusion2 decks4 decks
43%synergy
Scalding Tarn
50%inclusion2 decks4 decks
39%synergy
Vault of Champions
50%inclusion2 decks4 decks
17%synergy
Gemstone Mine
25%inclusion1 decks4 decks
25%synergy
Shadowy Backstreet
25%inclusion1 decks4 decks
13%synergy
Swamp
25%inclusion1 decks4 decks
-66%synergy
Valgavoth's Lair
25%inclusion1 decks4 decks
22%synergy
Sea of Clouds
25%inclusion1 decks4 decks
-11%synergy
Raffine's Tower
25%inclusion1 decks4 decks
-16%synergy
Island
25%inclusion1 decks4 decks
-68%synergy
Sink into Stupor
25%inclusion1 decks4 decks
13%synergy
Meticulous Archive
25%inclusion1 decks4 decks
11%synergy
Gloomlake Verge
25%inclusion1 decks4 decks
14%synergy
Floodfarm Verge
25%inclusion1 decks4 decks
14%synergy
Silent Clearing
25%inclusion1 decks4 decks
22%synergy
Starting Town
25%inclusion1 decks4 decks
21%synergy
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