Aurtri said that the Lepharist Revolutionaries were threatening the Observatory. She asked you to defeat them. During that battle, Aurtri figured out that the Lepharist Revolutionaries planned to destroy the Observatory with a Balaur relic. She asked you to seize Tiamat's Sword, making it impossible for them to destroy the observatory. You completed the mission and reported the result to Valurion in Altgard Fortress.