The owner who discovered this bone was probably a certain powerful person in ancient times, and a forbidden method was engraved on it, called: Vajra Mask.

Its real function is probably used for defense, but Tuoba Yitian used him to trap Ning Qi, the god of killing, and paid a considerable price for using the forbidden method, so that he was able to perish .

Putting away the 'Vajra Mask', Ning Qi glanced at the nearby Dou Zun lightly.