C678 Reviving Grass

"Those are not important. In fact, as long as a little bit of demonic energy enters, the seal on the box will be unlocked. You can take out a Demon Repelling Pill from it, but you can only open the box if you have collected all the demonic energy."

Zhang Nan didn't know how to complain about this design.

Besides, he didn't even know how to judge whether there was a Demon Repelling Pill inside