Darth Infectus was a male Zabrak Sith Assassin and Dark Lord of the Sith who survived from Jedi and keeps the dark energy strong on Thule. He was a constant threat of any Jedi who should try to destroy the dark side energy of this planet. He led a group of over a thousand Sith Marauders that lived at the Sith Temple of Thule. His presence was secret and unknown to the Jedi.