During the Alderaan Civil War, House Thul was been invaded by the Killiks. Yudin Thul believed that these creatures could be driven back, so he went on to search for answers. In 3643 BBY, he eventually discovers that these Killik Relics from a nearby ruin could hold important historical information about the Killiks that will help in defeating these natives. After sending a team of researchers to retrieve the relics, Yudin saw that they haven't returned. He later tasks an Imperial spacer to reach the relics from the Anzaada Cavern.
- Star Wars: The Old Republic (First appearance)