After some hesitation, he revealed, "It is a type of rare metal."
"Metal?" Xinghe said with mild surprise.
She studied the black casket in her hands and realized it did look metallic; it definitely wasn't a common metal.
This was because the thing was incredibly light, so much so that Xinghe thought the thing was hollow, an observation that was proven wrong after analysis.
She didn't ponder the possibility of it being a rare metal.
"What kind of metal?" Xinghe followed up.
"You wouldn't know even if I tell you, and as to why I want it, that doesn't concern you either. That's all I can say, I don't know any more than that."
"How did you know I had this in my possession?" Xinghe pressed.
Ye Shen smirked. "That is none of your business either. The only thing you need to know is it is useless to you but incredibly useful to me."
