Yin and Ning meet Tuoba Yuan and Can Lang during their travels.
They are members of the rebel forces fighting against the Taibai Empire and invite the sisters to join them. They claim it is the duty of one who possesses the tianshu and the Xuan Yuan Sword. Meanwhile, in the Taibai Empire, the recently promoted Zhao struggles with the development of new constructs. In order to give him a chance of pace, the  mpress Long Cheng assigns Zhao to command a unit of constructs and travel the empire. However--
No one in the Taibai Empire is 
capable of using black fire yet.
لا أحد في إمبراطورية تاي يقدر 
على استعمال النار السوداء بعد
Niemand im Taibai-Reich kann
die schwarze Flamme bislang nutzen.
Todavía nadie en el imperio Taibai
puede usar el fuego negro.
Todavía nadie en el imperio Taibai
puede usar el fuego negro.
Personne à l’empire de Taihaku
ne maîtrise encore ses secrets.
Per il momento, nessuno nell'Impero Taibai 
è in grado di usare il fuoco nero.
Ninguém do Império Taibai
consegue usar fogo negro ainda.
В Тайбайской империи ещё никто
не научился использовать его.