Blackstone Manor: A Horror Mystery One-Shot Adventure

Publisher: Dungeon Masters Guild

Adventure Hook:

This horror-mystery one-shot thrusts players into the decaying halls of Blackstone Manor, where memory fades, secrets lie, and the line between host and prisoner blurs with every passing hour. Explore a sprawling estate, interrogate its strange residents, and race against time to uncover the truth behind Blackstone Manor.

Overview:

The adventurers awake inside the once-grand Blackstone Manor with no memory of their arrival. As they explore, they encounter the noble Blackstone family—fractured, paranoid, and hiding terrible secrets—unaware of the true evil that lies beneath. The truth behind the mystery is an Oblex—a powerful ooze with psionic powers—who feeds on fear, impersonates the noble family, and slowly erases their memories. The adventurers must uncover the dark secrets hidden beneath the house, or otherwise fall prey to the same fate as the Blackstone family.

About The Session:

This is a single module designed to be run using the 5E system along any popular TTRPG. It may be run as a one-shot adventure or added into any current game you are running.

This adventure is best suited for intermediate to experienced Dungeon Masters, as it features layered mysteries, roleplay-driven encounters, and dynamic horror elements. However, beginner DMs will still find it approachable, with clear structure and flexible guidance to help you run the session with confidence.

This adventure is designed for a group of adventurers from 6th to 10th level, but, may be modified to fit any adventure.

*Can be included as a supplement in Curse of Strahd or any setting in Ravenloft or the Underdark*

: $1.99