C143 School Together

"Sigh, looks like I can only use a substitute." Mo Feiyu muttered helplessly.

In fact, it's not like normal jade couldn't be used as the cornerstone of the array, it's just that using normal jade won't be easy once and for all. It needs to be constantly replaced and the effect will be greatly reduced, so Mo Feiyu hadn't used normal jade for a long time, but now he had no choice but to use it