Training

Athan didn't change his face hearing that, but internally, he frowned, ' I don't remember telling Yone about this at all. But...It seems like he had noticed this alreadya and just didn't question me about it. '

He was instead surprised that Yone sent help instead of questioning him about it. After all, not being able to store chaos essence and chaos force is a big problem. It's not like he would always have access to the chaos essence when he ventured outside.

He could rely on chaos stones for that, but chaos stones were a vital currency and resource to train. The chaos stones contain two things; chaos force and order force, and he would have to refine chaos stones to bring them out. 

But he didn't need to worry about this since he had already thought of a way to store chaos force and chaos essence inside his void region.