Publisher's blurb: A two- to four-hour adventure for 5th-10th level characters “Agents have uncovered several cells of the Cult of the Heir in the Moonsea region. Plan and lead an elite operation to eliminate the cells, but beware... one wrong choice might lead to certain death.” In this adventure, the characters hunt down Thelbunious, a powerful warlock of the Heir of Orcus. Once they track him down, they discover unspeakable horrors that drive them insane and twist their minds! Can the characters overcome the evil, vile, twisted Star Spawn creatures that lie deep within the Caves of Writhing Nightmare? The bonus objectives add-on two hours of play and allow the characters to seek out and destroy two secret cultists’ cells hidden within the Moonsea region. Visit Ylraphon and travel aboard the mysterious midnight carriage to prevent the cult from enlisting the aid of a dragon, or go deep within the Flooded Forest to uncover the Cult of the Heir’s activities in a notorious tavern. The choices are yours to make!