Chapter 588: Death Summon

Regarding the Undead Eye, Lin Yun had gotten some understanding...

In the decaying library's books, he had once seen some information regarding the Undead Eyes, how they were formed and how they died out.

Places rich in death energy had a chance of birthing an Undead Eye, but the Undead Eyes were very weak during the birthing process. During the peak of the Magic Era, most Undead Eyes didn't have time to fully mature before being destroyed. 

A mature and awakened Undead Eye could open a Death Gate connected to the Undead Plane, and from the moment they awakened, a steady flow of the Undead would go through the Death Gate until the power of the Undead Eye was eventually consumed and it withered away, closing the Death Gate leading to the Undead Plane.

But it was written that an awakened Undead Eye would almost never be destroyed midway. Every time an Undead Eye appeared, it would cause a huge Undead Calamity.