Tianming somehow finds the way to transform Feigong into all kinds of weapons. Gongshu Chou operates the machines and traps the three children, but himself is also sent into the prison that Tianming and Yuer falls into. Gongshu Chou claims to be a friend of Master Ban. He tells Tianming about the sword painted on the ground, the Broken Rainbow. This sword was the one Jing Ke used to assassin Ying Zheng. After Jing Ke died, Ying Zheng Broken Rainbow reforged as Rainbow Abyss and granted it to the person who killed Jing Ke. Tianming is shocked to know Ge Nie has killed Jing Ke.
高月发现天明从铜人身上拿下的钥匙就是墨家历代相传的至尊武器非攻，二人继续前进，却不慎落入了一个神秘的地方，他们在这里遇到了同样被机关困住的公输仇，公输仇告诉了他们墨家禁地的真正意义，并为他们讲述了渊虹与残虹的渊源，以及荆轲刺秦王的过程，天明不相信公输仇之言，急于出去寻找盖聂，而公输仇利用这点准备继续他的计划。
