A slaver gang known as the Bloodreavers are terrorizing the countryside from their base deep in the labyrinth under Thunderspire Mountain. But these slavers are only the symptom of a larger threat in the bowels of Thunderspire.

Uncover a Hidden Legacy A lost passageway on the upper level of the most infamous dungeon in Faerûn has recently been uncovered. When a patron hires a band of adventurers to brave the dangers of Undermountain, a search is on to uncover secrets of an apprentice of the dungeon’s lost creator – Halaster.