The girl that appeared out of the tianshu bamboo writing strip is Yun, a doll made using Mujia.
Yun calls the sword that appeared out of the tianshu the legendary Xuan Yuan Sword. Through Yun, Yin and Ning acquire new power.
Meanwhile, with a single word from Empress Cheng, Zhao is made chief engineer. He now works on developing constructs.
Mo Heng, who betrayed the empire and joined the rebel army, is also working on a new weapon he calls black fire armor.
It's a strange sword that seems
 to have magical powers.
إنّه سيفٌ غريب يبدو وأنّه يمتلك
قوى سحرية
Es ist ein mysteriöses Schwert,
das offenbar über magische Kräfte verfügt.
Es una espada extraña
que parece tener poderes mágicos.
Es una espada extraña
que parece tener poderes mágicos.
C’est une lame mystérieuse
qui semble presque magique.
È una spada strana 
che sembra avere poteri magici.
É uma espada estranha que
parece ter poderes mágicos.
Он обладает странной силой,
будто бы он волшебный.