gressive, incredibly fast, and almost unstoppable. In a very short amount of time, they can devour someone's soul completely.Even a martial arts master, if attacked by more than a dozen ghost spirits..."Whoosh..."

A flash of light, and the stone door swung open.

"Please, Great One, let us go! We have committed no crime. We are Demon Kings, appointed by Your Majesty himself! Release us!"

Before I even stepped inside, I could hear the hysterical screams coming from within.

"Tap tap tap..."

Fang Yu's footsteps echoed within the cell.

Stepping into the cell, even in the dim light, Fang Yu could still see three figures.

They were hung on the wall, their limbs nailed to it with some dark long nails, blood still dripping from their bodies, and their breaths faint.

These three were the other three demon kings who participated in the siege of Lin Daochen back then.

Ancient Crystal Demon King, Earth Blaze Demon King, True Grace Demon King.al energy is by no means a simple matter.Half a month passed, and Fang Yu's research hadn't made much progress.However, he had fallen into that same state of feverish research from back then, with an...