Thamus Rock is a giant rock formation located in Frass Chasm. It has been carved into the image of the great troll warrior Thamus. Thamus became famous for battling the Knights in the Dogma Wars and assisting the Athwani. He was the only one powerful enough to defeat the Knights but failed. The Rock was built to honour him by the Windwalkers who live nearby in Baccea. They often come to Thamus Rock to pay their respects to Thamus. The Rock has been duplicated several times. Smaller versions of it can be found throughout Frass Chasm.