From the front of the book: The Dragon Twins’ Lair is an adventure designed for five 8th-level player characters (PCs), and is part of the D&D Delve Night kit. Please review the instructions for use of the D&D Delve Night kit before using this adventure. The adventure uses the Fane of the Forgotten Gods dungeon tile set and takes place in an abandoned temple to Tiamat some distance away from any city.