Chapter 1559: True Dragon Nirvana

"Oh? What's going on…"

Perfected Hou, who had charged into the Sinkhole disciple crowd, also sensed the changes Yi Yun was undergoing. He turned his head and looked at Yi Yun in astonishment.

The present Yi Yun had already been reduced to a nearly inhuman state. Why was he able to release such terrifying strength?

"Heavenly Cosmic! What's happening!?" Perfected Hou roared angrily.

At that moment, Heavenly Cosmic's hair was disheveled and his expression was pale. He, too, was suffering while attacking Yi Yun with the Lightning of Heavenly Punishment!

Casting the ninth-staged Heavenly Tribulation was very demanding on him. He needed to burn his blood essence in order to do so.