The second adventure in a three-part series of core Dungeons & Dragons adventures.DD2 The Sinister Spire is the second adventure of a three-part series, but it can also be played as a stand-alone adventure. In the first adventure, DD1 Barrow of the Forgotten King, the heroes stumbled upon an evil plot involving the theft of ancient bones from a king's tomb. In The Sinister Spire, the heroes chase the tomb-robbers into the Underdark and stumble upon a desolated subterranean city with a dark secret.This 64-page adventure is designed for 4th-level characters and uses a combat encounter format designed to make the DM's job easier.