Having steeped their weapons in the ancient magic of Thassilon, the PCs are finally ready to confront the newly risen Runelord Karzoug at the seat of his power. To do so, they must travel high into the mountains, to the fabled city of Xin-Shalast, where theyll be confronted by enormous giants, dragons, and other monsters before they can finally confront the mad wizard of greed in his mountaintop palace. Yet can defeating Runelord Karzoug stop the rise of the Runelords? Or are there more terrors yet to come? This volume also presents all the information youll need to run Karzoug, including several unique spells and magic items. Also detailed is an expansive gazetteer of the ruined city of Xin-Shalast its secrets and treasures and dangers can provide for many more sessions of excitement after Karzoug is defeated. For characters of 14th to 15th level.