23 cards where the card types include “room” and (the card is available on Paper) and the set is “dsk”

Bottomless Pool // Locker Room (Duskmourn: House of Horror #43)
Central Elevator // Promising Stairs (Duskmourn: House of Horror #44)
Charred Foyer // Warped Space (Duskmourn: House of Horror #129)
Dazzling Theater // Prop Room (Duskmourn: House of Horror #3)
Defiled Crypt // Cadaver Lab (Duskmourn: House of Horror #91)
Derelict Attic // Widow's Walk (Duskmourn: House of Horror #93)
Dollmaker's Shop // Porcelain Gallery (Duskmourn: House of Horror #4)
Funeral Room // Awakening Hall (Duskmourn: House of Horror #100)
Glassworks // Shattered Yard (Duskmourn: House of Horror #137)
Grand Entryway // Elegant Rotunda (Duskmourn: House of Horror #15)
Greenhouse // Rickety Gazebo (Duskmourn: House of Horror #181)
Meat Locker // Drowned Diner (Duskmourn: House of Horror #65)
Mirror Room // Fractured Realm (Duskmourn: House of Horror #67)
Moldering Gym // Weight Room (Duskmourn: House of Horror #190)
Painter's Studio // Defaced Gallery (Duskmourn: House of Horror #147)
Restricted Office // Lecture Hall (Duskmourn: House of Horror #227)
Roaring Furnace // Steaming Sauna (Duskmourn: House of Horror #230)
Smoky Lounge // Misty Salon (Duskmourn: House of Horror #235)
Surgical Suite // Hospital Room (Duskmourn: House of Horror #34)
Ticket Booth // Tunnel of Hate (Duskmourn: House of Horror #158)
Underwater Tunnel // Slimy Aquarium (Duskmourn: House of Horror #79)
Unholy Annex // Ritual Chamber (Duskmourn: House of Horror #118)
Walk-In Closet // Forgotten Cellar (Duskmourn: House of Horror #205)

The message was clear to Sorin—time to search for something else.