C974 Ning Beixuan Came

974. Ning Beixuan is here!

"Ai, the biggest problem is that the quality of the materials we use to refine the Dragon Slaying bullet is too low. We are unable to retain the power of Laws. These materials are enough to refine a Heaven Rank Supreme Battle Weapon!"

The experiment failed once more. Old Man Jin could not help but sigh.

"Quality of the materials?"

Ning Qi's eyes moved slightly