A flash of light appeared in his hand. "The treasure in my hand is called the Heaven Mystery Disk. It is a unique artifact; it possesses neither offensive nor defensive capabilities, but it is excellent for tracking. As long as a person's aura is imprinted onto it, they cannot hope to escape its lock within a range of ten thousand miles..."
Xu Chen glanced at the Heaven Mystery Disk in the Prison King's hand with mild surprise; it was indeed a useful item.
As for how his aura had fallen into the Prison King's hands, he did not ask, because obtaining it would have been effortless.
Chapter 368