Darth Vinter was one of the three Dark Lords of the Sith who ruled over the Three Empires. Vinter specifically controlled the Unknown Regions government of the Sith Empire during the years of the Galactic Recession and the war that came afterwards. Vinter was an unusual Sith Lord in that his body was literately breaking apart and he needed special Sith armor enhanced by Sith alchemy to keep himself stable. Without it, he would break apart.