Ancanus recommended that you meet the Reian scientist Phavilian to find out more about the Dragonbound. Phavilian said that the Dragonbound followers had taken root in Avad Village. He also advised you to look for Flavia. You defeated the Avad Dragonbound and found parts of the Idgel Purification Device. Flavia explained that similar parts had also been seen with the Dragonbound followers in Siel's Temple ruins. You scouted the situation in Siel's Temple Ruins and took care of the leader of the Beritra Army controlling the Dragonbound. Afterwards, you reported back to Flavia and Ancanus.