It Came from Hollow Mountain

The Return of the Runelords Adventure Path continues as the heroes travel south to the city of Magnimar with disturbing news—the ancient runelords of Thassilon are awakening! With Varisia's greatest heroes on a secret mission, the task of following up on these rumors falls to a new generation of heroes who must brave the dangers of Hollow Mountain, one of Varisia's most notorious ruins. What secrets await discovery within this sprawling dungeon complex, and is it already too late to halt the return of the Runelords