Author's blurb: This adventure was written for the Unite the Factions Extra Life Day 2019. All author proceeds from the sale of the adventure will be donated to Extra Life. This adventure is a little different. Inspired by board games, House of Masks combines on-the-spot improv with using character skills to create social interactions that can be actively won and lost. Characters get to play through a few of these, creating a unique experience. The adventure's story takes place at a grand ball and has been designed to allow for other DMs, players from other tables, or special guests to get involved in the roles of NPCs. This of course is not required, as at it's still very much a single-table adventure. House of Masks serves as an fun interlude of sorts in the Spies Below the Moonsea series, and as such doesn't require knowledge of the other adventures in the series, or to be followed-up by another adventure. It's entirely self-contained.