The Lady of Trollskull Priory is a nice thing to have in the pocket of any DM who wants to run Waterdeep: Dragon Heist, especially those who wish to add elements related to gothic horror to their games. It consists of three encounter-like “episodes” that can occur at different times. It also has a mini ‘dungeon’ with a working map as well as handouts, and advice for running the adventure with regards to different elements of play. Something I really liked is how it incorporated different elements of Ravenloft lore into the adventure’s background, giving DMs who are running tables that have gone through the Curse of Strahd adventure to see the bleed-over effects of what has happened there.
All-in-all, it’s a great distraction for the players from the central plot of Dragon Heist that is perfect for a Halloween episode, and easy to integrate to almost any point in the adventure. What I would have liked to see, however, is the adventure being less sanitized to avoid perceived offenses; vampires have an inherent darkness about them. They are monsters. From this perspective, I don’t think it’s wrong to have vampires be predatory as other monsters are. That’s what makes them scary, and I feel like there is a missed opportunity for more darkness in that sense. Additionally, I wish there were more tie-ins to the rest of Dragon Heist.
Definitely worth it if you’re looking for an extra something for your Dragon Heist campaign.