The Master of Keys (Commander) - Expensive Rooms

The Master of Keys
Rank #314
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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
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Wan Shi Tong, Librarian
50%inclusion1 decks2 decks
45%synergy
Wan Shi Tong, All-Knowing
50%inclusion1 decks2 decks
50%synergy
Benevolent River Spirit
50%inclusion1 decks2 decks
50%synergy
Dutiful Knowledge Seeker
50%inclusion1 decks2 decks
50%synergy
Koh, the Face Stealer
50%inclusion1 decks2 decks
50%synergy
Game Changers
Smothering Tithe
100%inclusion3 decks3 decks
68%synergy
Rhystic Study
67%inclusion2 decks3 decks
34%synergy
Enlightened Tutor
33%inclusion1 decks3 decks
13%synergy
Fierce Guardianship
33%inclusion1 decks3 decks
13%synergy
Cyclonic Rift
33%inclusion1 decks3 decks
9%synergy
Creatures
Inquisitive Glimmer
100%inclusion3 decks3 decks
92%synergy
Enduring Curiosity
100%inclusion3 decks3 decks
92%synergy
Fear of Sleep Paralysis
100%inclusion3 decks3 decks
94%synergy
Overlord of the Floodpits
67%inclusion2 decks3 decks
63%synergy
Demon of Fate's Design
67%inclusion2 decks3 decks
61%synergy
Overlord of the Balemurk
67%inclusion2 decks3 decks
65%synergy
Mesa Enchantress
67%inclusion2 decks3 decks
58%synergy
Archetype of Imagination
67%inclusion2 decks3 decks
62%synergy
Doomwake Giant
67%inclusion2 decks3 decks
61%synergy
Grim Guardian
67%inclusion2 decks3 decks
64%synergy
Heliod, the Radiant Dawn
67%inclusion2 decks3 decks
63%synergy
Ghostly Dancers
67%inclusion2 decks3 decks
64%synergy
Entity Tracker
67%inclusion2 decks3 decks
60%synergy
Fear of Falling
33%inclusion1 decks3 decks
33%synergy
Optimistic Scavenger
33%inclusion1 decks3 decks
33%synergy
Scrabbling Skullcrab
33%inclusion1 decks3 decks
32%synergy
Dashing Bloodsucker
33%inclusion1 decks3 decks
33%synergy
Shimmerwing Chimera
33%inclusion1 decks3 decks
33%synergy
Starfield Mystic
33%inclusion1 decks3 decks
27%synergy
Starving Revenant
33%inclusion1 decks3 decks
33%synergy
The Mindskinner
33%inclusion1 decks3 decks
33%synergy
Eidolon of Rhetoric
33%inclusion1 decks3 decks
32%synergy
Sheoldred, the Apocalypse
33%inclusion1 decks3 decks
25%synergy
Fear of Failed Tests
33%inclusion1 decks3 decks
33%synergy
Arna Kennerüd, Skycaptain
33%inclusion1 decks3 decks
31%synergy
Archon of Sun's Grace
33%inclusion1 decks3 decks
29%synergy
Danitha Capashen, Paragon
33%inclusion1 decks3 decks
30%synergy
Fear of Surveillance
33%inclusion1 decks3 decks
33%synergy
Elesh Norn, Mother of Machines
33%inclusion1 decks3 decks
31%synergy
Esper Sentinel
33%inclusion1 decks3 decks
6%synergy
Soaring Lightbringer
33%inclusion1 decks3 decks
28%synergy
Drogskol Reaver
33%inclusion1 decks3 decks
29%synergy
Silent Hallcreeper
33%inclusion1 decks3 decks
29%synergy
Drogskol Reinforcements
33%inclusion1 decks3 decks
33%synergy
Riptide Chimera
33%inclusion1 decks3 decks
33%synergy
Hedron Crab
33%inclusion1 decks3 decks
33%synergy
Overlord of the Mistmoors
33%inclusion1 decks3 decks
31%synergy
Ruin Crab
33%inclusion1 decks3 decks
32%synergy
Victor, Valgavoth's Seneschal
33%inclusion1 decks3 decks
31%synergy
Enduring Tenacity
33%inclusion1 decks3 decks
26%synergy
Athreos, Shroud-Veiled
33%inclusion1 decks3 decks
29%synergy
Arvinox, the Mind Flail
33%inclusion1 decks3 decks
32%synergy
Pearl-Ear, Imperial Advisor
33%inclusion1 decks3 decks
31%synergy
Gremlin Tamer
33%inclusion1 decks3 decks
32%synergy
Balemurk Leech
33%inclusion1 decks3 decks
33%synergy
Moonshaker Cavalry
33%inclusion1 decks3 decks
30%synergy
Ancient Cellarspawn
33%inclusion1 decks3 decks
30%synergy
Aminatou, Veil Piercer
33%inclusion1 decks3 decks
32%synergy
Grand Abolisher
33%inclusion1 decks3 decks
19%synergy
Zur, Eternal Schemer
33%inclusion1 decks3 decks
30%synergy
Instants
Void Rend
67%inclusion2 decks3 decks
33%synergy
Mana Drain
67%inclusion2 decks3 decks
49%synergy
Swords to Plowshares
67%inclusion2 decks3 decks
-2%synergy
Mental Misstep
33%inclusion1 decks3 decks
26%synergy
Dovin's Veto
33%inclusion1 decks3 decks
8%synergy
An Offer You Can't Refuse
33%inclusion1 decks3 decks
7%synergy
Flusterstorm
33%inclusion1 decks3 decks
25%synergy
Force of Negation
33%inclusion1 decks3 decks
21%synergy
Path to Exile
33%inclusion1 decks3 decks
-9%synergy
Pact of Negation
33%inclusion1 decks3 decks
25%synergy
Batwing Brume
33%inclusion1 decks3 decks
33%synergy
Sorceries
Resurgent Belief
33%inclusion1 decks3 decks
31%synergy
Replenish
33%inclusion1 decks3 decks
32%synergy
Wash Out
33%inclusion1 decks3 decks
33%synergy
Idyllic Tutor
33%inclusion1 decks3 decks
29%synergy
Blood Money
33%inclusion1 decks3 decks
33%synergy
Toxic Deluge
33%inclusion1 decks3 decks
14%synergy
Extinguish All Hope
33%inclusion1 decks3 decks
32%synergy
Cruel Tutor
33%inclusion1 decks3 decks
33%synergy
Maddening Cacophony
33%inclusion1 decks3 decks
32%synergy
Stream of Thought
33%inclusion1 decks3 decks
33%synergy
Redress Fate
33%inclusion1 decks3 decks
27%synergy
Breach the Multiverse
33%inclusion1 decks3 decks
31%synergy
Utility Artifacts
Sword of Fire and Ice
33%inclusion1 decks3 decks
31%synergy
Mask of the Schemer
33%inclusion1 decks3 decks
32%synergy
Keys to the House
33%inclusion1 decks3 decks
33%synergy
Excalibur, Sword of Eden
33%inclusion1 decks3 decks
31%synergy
Sword of Feast and Famine
33%inclusion1 decks3 decks
30%synergy
The Water Crystal
33%inclusion1 decks3 decks
32%synergy
Enchantments
Mystic Remora
100%inclusion3 decks3 decks
79%synergy
Restricted Office // Lecture Hall
100%inclusion3 decks3 decks
98%synergy
Ghostly Prison
100%inclusion3 decks3 decks
78%synergy
Sigil of the Empty Throne
67%inclusion2 decks3 decks
61%synergy
Central Elevator // Promising Stairs
67%inclusion2 decks3 decks
66%synergy
Sphere of Safety
67%inclusion2 decks3 decks
57%synergy
Funeral Room // Awakening Hall
67%inclusion2 decks3 decks
66%synergy
Dress Down
67%inclusion2 decks3 decks
64%synergy
Dazzling Theater // Prop Room
67%inclusion2 decks3 decks
65%synergy
Secret Arcade // Dusty Parlor
67%inclusion2 decks3 decks
62%synergy
Hallowed Haunting
67%inclusion2 decks3 decks
64%synergy
Mirror Room // Fractured Realm
67%inclusion2 decks3 decks
64%synergy
Propaganda
67%inclusion2 decks3 decks
40%synergy
Polluted Bonds
33%inclusion1 decks3 decks
32%synergy
Cacophony Unleashed
33%inclusion1 decks3 decks
32%synergy
Protective Bubble
33%inclusion1 decks3 decks
33%synergy
Songbirds' Blessing
33%inclusion1 decks3 decks
32%synergy
Court of Cunning
33%inclusion1 decks3 decks
32%synergy
Ripples of Undeath
33%inclusion1 decks3 decks
31%synergy
Drake Umbra
33%inclusion1 decks3 decks
33%synergy
Underwater Tunnel // Slimy Aquarium
33%inclusion1 decks3 decks
33%synergy
Psychic Corrosion
33%inclusion1 decks3 decks
32%synergy
Obscura Ascendancy
33%inclusion1 decks3 decks
33%synergy
Extravagant Replication
33%inclusion1 decks3 decks
28%synergy
Tinybones Joins Up
33%inclusion1 decks3 decks
32%synergy
Aspect of Gorgon
33%inclusion1 decks3 decks
33%synergy
Cloak of Invisibility
33%inclusion1 decks3 decks
33%synergy
Surgical Suite // Hospital Room
33%inclusion1 decks3 decks
33%synergy
Mirrormade
33%inclusion1 decks3 decks
24%synergy
Estrid's Invocation
33%inclusion1 decks3 decks
29%synergy
Shark Typhoon
33%inclusion1 decks3 decks
28%synergy
Derelict Attic // Widow's Walk
33%inclusion1 decks3 decks
33%synergy
Starfield of Nyx
33%inclusion1 decks3 decks
29%synergy
Blessing of Leeches
33%inclusion1 decks3 decks
33%synergy
Asha's Favor
33%inclusion1 decks3 decks
33%synergy
Marit Lage's Slumber
33%inclusion1 decks3 decks
33%synergy
Amphibian Downpour
33%inclusion1 decks3 decks
29%synergy
All That Glitters
33%inclusion1 decks3 decks
25%synergy
Seal of Cleansing
33%inclusion1 decks3 decks
32%synergy
Bottomless Pool // Locker Room
33%inclusion1 decks3 decks
31%synergy
Sage's Reverie
33%inclusion1 decks3 decks
31%synergy
Animate Dead
33%inclusion1 decks3 decks
24%synergy
Painful Quandary
33%inclusion1 decks3 decks
31%synergy
Revel in Riches
33%inclusion1 decks3 decks
32%synergy
Polluted Cistern // Dim Oubliette
33%inclusion1 decks3 decks
33%synergy
Sheltered by Ghosts
33%inclusion1 decks3 decks
31%synergy
Black Market Connections
33%inclusion1 decks3 decks
19%synergy
Ethereal Armor
33%inclusion1 decks3 decks
29%synergy
Dollmaker's Shop // Porcelain Gallery
33%inclusion1 decks3 decks
32%synergy
Oversold Cemetery
33%inclusion1 decks3 decks
31%synergy
Utility Lands
Hall of Heliod's Generosity
67%inclusion2 decks3 decks
54%synergy
Halimar Depths
33%inclusion1 decks3 decks
29%synergy
Urza's Saga
33%inclusion1 decks3 decks
21%synergy
Reliquary Tower
33%inclusion1 decks3 decks
0%synergy
Otawara, Soaring City
33%inclusion1 decks3 decks
14%synergy
Mana Artifacts
Arcane Signet
67%inclusion2 decks3 decks
-21%synergy
Sol Ring
67%inclusion2 decks3 decks
-23%synergy
Chromatic Lantern
33%inclusion1 decks3 decks
20%synergy
Crystal Skull, Isu Spyglass
33%inclusion1 decks3 decks
32%synergy
Azorius Signet
33%inclusion1 decks3 decks
1%synergy
Lands
Command Tower
100%inclusion3 decks3 decks
8%synergy
Raffine's Tower
100%inclusion3 decks3 decks
59%synergy
Vault of Champions
100%inclusion3 decks3 decks
67%synergy
Azorius Chancery
67%inclusion2 decks3 decks
52%synergy
Dimir Aqueduct
67%inclusion2 decks3 decks
53%synergy
Swamp
67%inclusion2 decks3 decks
-25%synergy
Godless Shrine
67%inclusion2 decks3 decks
16%synergy
Arcane Sanctum
67%inclusion2 decks3 decks
12%synergy
Orzhov Basilica
67%inclusion2 decks3 decks
51%synergy
Island
67%inclusion2 decks3 decks
-26%synergy
Plains
67%inclusion2 decks3 decks
-25%synergy
Meticulous Archive
67%inclusion2 decks3 decks
53%synergy
Gloomlake Verge
67%inclusion2 decks3 decks
56%synergy
Marsh Flats
67%inclusion2 decks3 decks
30%synergy
Hallowed Fountain
67%inclusion2 decks3 decks
17%synergy
Floodfarm Verge
67%inclusion2 decks3 decks
55%synergy
Flooded Strand
67%inclusion2 decks3 decks
29%synergy
Watery Grave
67%inclusion2 decks3 decks
17%synergy
Undercity Sewers
33%inclusion1 decks3 decks
19%synergy
Clearwater Pathway
33%inclusion1 decks3 decks
27%synergy
Brightclimb Pathway
33%inclusion1 decks3 decks
26%synergy
Shadowy Backstreet
33%inclusion1 decks3 decks
21%synergy
Myriad Landscape
33%inclusion1 decks3 decks
25%synergy
Prairie Stream
33%inclusion1 decks3 decks
-7%synergy
Riveteers Overlook
33%inclusion1 decks3 decks
33%synergy
Snow-Covered Island
33%inclusion1 decks3 decks
30%synergy
Sea of Clouds
33%inclusion1 decks3 decks
-2%synergy
Isolated Chapel
33%inclusion1 decks3 decks
-6%synergy
Darkslick Shores
33%inclusion1 decks3 decks
30%synergy
Evolving Wilds
33%inclusion1 decks3 decks
8%synergy
Snow-Covered Plains
33%inclusion1 decks3 decks
30%synergy
Morphic Pool
33%inclusion1 decks3 decks
-1%synergy
Snow-Covered Swamp
33%inclusion1 decks3 decks
30%synergy
Polluted Delta
33%inclusion1 decks3 decks
-4%synergy
Deserted Beach
33%inclusion1 decks3 decks
12%synergy
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