- Explore the Plane of Faerie in the first official D&D adventure set primarily in the Feywild.
- The adventure begins on a campaign world of the DM’s choice. The Witchlight Carnival, which serves as the means by which the characters enter the Feywild, can be dropped easily into any campaign setting.
- Adds two new character backgrounds: the Feylost (for characters who grew up in the Feywild) and the Witchlight Hand (for characters who work at the Witchlight Carnival).
- Introduces two races—play as a fairy or as a harengon, a race of humanoid rabbits.
- All encounters in the adventure include a non-combat option, allowing players to think and roleplay their way through the adventure if they wish.
- Classic 1980s Dungeons & Dragons characters return, including Warduke, Strongheart, and Kelek.