1x35 - The Long Ballad

Ya Luo goes to the royal court to talk to Great Khan, and Lei Meng kills him under Khatun's orders. After giving Great Khan a tonic, Khatun steals the royal seal and fakes a letter from Great Khan to Ashina Sun. Not knowing that Ya Luo is dead and with the capital refusing to help the Eagle Army, Chang Ge and Yanxing Sect sets out to Northern Desert with Mimi to find purple gromwell.