The Field of Bones and Black Glass on Whyrlis Rock island in the Shackles is thought to be the field where the disastrous final battle between Raugsmauda and Gray Whyrlis occurred. The gruesome site is a magically dead zone about 4 miles in diameter. The place looks as though hundreds of skeletons clad in ancient armor were trapped and frozen in glassy black tar. A closer look reveals that the skeletal soldiers are fixed fast in solid obsidian as the earth beneath the victims boiled and solidified in seconds. Few adventurers dare to enter the place and snatch a sword or helm, and the field has remained undisturbed for thousands of years.