“An effigy requires a central focus. The coven are fond of using animal skulls for this purpose, but for your task you will need something much more potent.
Korvash was a trusted lieutenant to Gorak Tul, as well as a powerful sorcerer, until he was defeated at the battle of Arom's Stand. His bones remain at the site of his demise, now buried by the years.
Find them, and take his skull.”