Korin Aphra, a Professor, penned "Notes on Jedi Heresies," a collection of observations concerning various heretical Jedi factions. Within these notes, one finds a concise account of Jedi Master Oo'ob's activities following the conclusion of the Corsair Wars. Specifically, Oo'ob enlisted the aid of Var-Whill, a crystallist, to engineer a sniper rifle known as the Farkiller, which incorporated lightsaber tech. These notes were found within the memory banks of Teezee-Too, a protocol droid serving the Alliance to Restore the Republic. Teezee-Too intended to leverage the Farkiller's advanced engineering to assassinate Emperor Palpatine sometime before 3 ABY.