Han Yan certainly wouldn't let Nie Fangsheng off. Although she now had Chaos Heavenly Fire, which could resonate with her heart and help her control the heat in sword forging, Chaos Heavenly Fire didn't know any Sword Casting Techniques. She still had to learn and comprehend it herself.
Nie Fangsheng said he would pass on the ancestral Sword Casting Technique of the Nie Family, but how could Han Yan trust his character? What if he did something tricky or held back some knowledge, and she ended up being deceived without knowing why? It would be better to obtain the Nie Family's ancestral Sword Casting Secret Manual.
Of course, Star Illusion Thousand Machine also knew the Sword Casting Technique, but unfortunately, his specialty lay in the God-man Technique. He only knew the mnemonics of Sword Casting Technique, and had no idea how to apply it. Relying solely on these mnemonics to comprehend Sword Casting would take an unknown amount of time.
