The Nil-Black corps was a cadre of five hundred Elite NyxTroopers only known by Jedi Master Yoda and Mace Windu. The Corps was led By Jedi Master Sel Mordon, his apprentice Jayce Nilo, and General Werda, a clone. They silently and invisibly carried out missions for the Galactic Republic, usually against Dark Jedi, bounty hunters, and mercenary groups.