Pathfinder #5 Rise of the Runelords Chapter 5: "Sins of the Saviors"

After defeating the giants of Mokmurian, the heroes discover that Karzong, an ancient wizard from the long-dead empire of Thassilon, has returned to life. From his city fortress of X-n-Shalast high in the mountains, he has been using the giants to harvest souls to reclaim his lost power. The secret to defeating him before he can reclaim his realm and enslave the region lies hidden in a deadly dungeon called Runeforge. After defeating the dragon that guards the entrance to Runeforge, the PCs must brave the haunted vaults below to discover the ancient forge capable of empowering weapons so that they can strike true against Karzoug. Yet in order to master this ancient magic, the heroes of Sandpoint must embrace the darkest sorcery of ancient Thassilon as their own. This volume of Pathfinder includes information on the dragons of the region (including a brand new type of dragon), as well as a collection of powerful magic items from the ancient empire of Thassilon for use in your campaign.