I think Lan Zhan would appreciate if he got the Lan Sect library. It does have many books and scrolls on spirits and demons.
Hmmmm, interesting. I like the sound of this illusion magic, not for purposes of tricking people but just to study it. But then I am shameless and a big fan of learning things to spite others.
They say the golden core is tied to a person's soul, but I am not so sure. Can you live without a soul? Can you regain one? I am not bothered or here to tell someone if they are wrong or right! I just like hearing about the differences, and learning new things.