From the PDF introduction
Lost Empires of Faerûn Web Enhancement
An Adventure for Four 6th-Level Player Characters
Lost Empires of Faerûn details the ancient past of the FORGOTTEN REALMS Campaign Setting-its magic, its greatness, and its failures. The book also offers invaluable tips for making a campaign world’s past relevant to current events. Secrets of Imaskar is a short D&D adventure for four 6th-level player characters (PCs). This short adventure uses feats, spells, monsters, and historical elements from ancient Imaskar. The action takes place in far eastern Mulhorand, at the edge of the Raurin Desert. In other campaign worlds, this adventure can be placed any place where the ruins of an ancient empire might be found. As always, feel free to adapt the material presented here as you see fit to make it work with your campaign.