Publisher's blurb: A mind flayer has called for a massive conference of monsters in the Underdark beneath Hillsfar. Trolls, umber hulks, demons, and more have answered the illithid's call. To infiltrate this gruesome menagerie, you must embrace the monster within yourself. A two-hour-adventure with two one-hour bonus objectives for 1st to 4th level characters. To succeed, the characters must transform into powerful Underdark monsters in order to infiltrate the mind flayer's conference. How will they handle their newfound power?