The Fist functioned as the One Sith's supreme military commander, a role held by a Sith Lord. Darth Krayt himself designated the Fist to this commanding position. Up to the year 130 ABY, Darth Nihl occupied the role of the Fist; however, following the death of his predecessor during the Massacre at Ossus, he was reassigned to the position of a Hand. By 137 ABY, Darth Stryfe was serving as Krayt's Fist, leading the Service in conjunction with Grand Admiral Morlish Veed.