Hask-Ultharan, the "Cairn of Many Torments", is an enormous cairn of quarried stone blocks located in the deepest center of Iobaria's Fangard Forest. The blocks are marked in the script of the cyclopes. It was originally used as a watchtower during the time of the Koloran Empire, similar to the towers of Fralros and Kask-Kirrulthar.
The Record of Truan Iolavai describes how the scholar and his party investigated the cairn, against the advice of his local guides, only to be driven off by a howling mob of malformed giants led by the demon lord Kostchtchie. Each new moon, massive bonfires are lit by a group of hill giants and their more malformed cousins and loud celebratory rites are performed.