Sastaretski Cargn was the Scarran envoy to the Sebacean Breakaway Colonies and accomplice of Prince Clavor. His main objective was to make sure that Clavor became the heir, paving the way for relations with the Scarran Empire. In order to remove Katralla, Cargn altered her DNA, making her incompatible with Sebacean males, and thus unable to bear children. This would have allowed Clavor, who was next in line, to assume the throne. By placing Clavor in Katralla's place, Clavor would ally the Breakaway Colonies with the Scarrans, effectively becoming a puppet of the Scarran Imperium. However, the arrival of John Crichton with Moya and later Scorpius greatly complicated their plans, particularly after Crichton was revealed to be compatible with Katralla. Clavor failed multiple attempts to kill