The Gnomish Cloaking Device is a trinket that can be crafted by Engineers with a minimum skill level of 200. It is usable only by Engineers with a skill level of at least 200. The recipe for this item is taught by , sold by Ravenholdt engineer Zan Shivsproket at Ravenholdt Manor in the Alterac Mountains. Anyone at neutral (the starting reputation) or greater reputation with Ravenholdt can purchase the recipe from him if it is in stock.