C399 Origin of the Forbidden Spell

There were some things that she didn't know, but Black Robe had been by her master's side for many years. He would definitely know.

"Little Lord." The man in black pushed open the door lightly and bowed respectfully to Yeh Feihuang.

"Black Robe, you should have heard Miss Bai's question just now. Do you know why?" Yeh Feihuang asked without any hesitation.

To Yeh Feihuang