Lord Haeresis was a Sith during Darth Krayt's reign. He was born as Ias on Taris in 140 ABY. His family was murdered when he was young, so he became a pickpocket and lived on the lower levels as a labeled thief. Ias was recruited by Darth Sicarum, who came to Taris one day, to join the One Sith. However, Ias, now proclaimed Darth Haeresis, left the One Sith soon before its collapses and went to Korriban to train new Sith for a new Order that was prophesied to surpass Darth Krayt's Order.