C424 It Was the Four God Spell

"With so many refining materials here, how can you be certain that what you've just pocketed is the Ten Thousand Year Red Copper?" Yun Xiaotian inquired, his tone grave.

Lu Shaoyou responded with another smile, "Because I seem to recognize all the other materials, it's improbable that any of them are the Ten Thousand Year Red Copper."

"Do you truly know all of them?" Yun Xiaotian asked