The Aerial Aetheric Field blocks the way to Tiamaranta, and the Field Generation device must be deactivated in order to launch the Obelium. Pomponia had heard that a Reian tribesman knows where the generation device may be found, so you asked Gelon. But the tribesman in question, Donikia, has been captured by Balaur from Hanarkand. Disguised as a Balaur, you snuck into Hanarkand to rescue Donikia, who told you that the Field Generation Device is in the Beshmundir Temple. Pomponia said she'd inform the fortress and praised your effort.