C619 A Shocking Breakthrough

"Demon King, there's something you don't know."

Zhixue explained, "There are too many in demon race, but the the lightning pool used to verify the Thunder tribulation is limited. We can't let everyone participate. This is just an ancient rule. It has long been changed by the later generations. "

"So that's how it is, but why does your sister want me to participate? If Elder Yuan participated