The Staff of Presence was a weapon wielded by Vahki Rorzakh. This tool allowed them to see and find out independently what the affected Matoran did without the victim feeling it. This staff allowed the Vahki to have an audio and visual transmission of what the affected Matoran or any other beings did, saw, heard, said, etc. These weapons fell out of use when the Vahki were destroyed in the Great Cataclysm.