Refining Lightning Wings

"Damn... this looks like a prison of lightning monsters. But then again, it's a prison of lightning monsters," Klaus smiled, watching the thousands of creatures, each made of pure lightning. 

They were now as docile as flowers inside his Tribulation Prison just waiting to be devoured.

'Too bad that bastard only left me one refining technique,' he sighed. Looking at the multitude of lightning monsters, Klaus knew he could do a lot with them.

First, he could use them to strengthen his lightning element, which had grown powerful but hadn't yet awakened—just like his ice element. Klaus would need to absorb a great deal of lightning to awaken it fully.

However, the Lightning Source Diagram, which Number Three had him steal back from the heavens, was intended to be his path forward. With the diagram, he could channel and use the lightning far more efficiently.