C719 It Was Difficult to Refine

Tianluo Secret Realm.

Lin Cheng stood in front of the furnace with a solemn expression.

This wasn't his first time concocting pills, but even when he tried concocting pills for the first time in his previous life, he didn't have such a serious expression on his face.

Only when he was concocting a Marrow-washing Pill in his previous life would he be so cautious