Rank 7 Neo-Demon (III)

Other than their Particles of End and Apocalyptic Stars, other phenomena were inside the Neo-Demons' skeletons. 

Ezequiel's ribcage contained a white lightning arc on the right and the Chaotic Core on the left. As for Zatiel's, he had his Karmic Samara Wheel in the right, the Chaotic Core on the left, but he also had a dark purple sphere in the center of his skull from which countless channels with crystalized vortex emerged. 

Issac was able to see all of that. He first focused on Ezequiel, and while the Chaotic Core drew his attention, the arc of white lightning was much more intriguing.

His eyes glowed as he attempted to decipher the mysteries behind it.