Frehorn's Blade is a short blade named after the prophet and founder of The Order of The Blessed Agonies, Jack Frehorn. The blade, when used, collects the mind and soul energies of the person killed, and puts them under anothers command. However, if one is to use the blade on themself, they become an intelligent wraith. Such was the case with Malcolm Somerset.
In the inventory screen of 6 Days a Sacrifice, the blade takes on a keylike appearance.