That's Basically It

In the end, Roan couldn't help but ask it directly. "99%, you said. Then, what is this remaining 1% that you can't guarantee isn't related to the Chaos Source?"

Kafan then raised his hand, and the Black and Gray colored Death Energy gathered around his hand. "Say, other than you, were any of your friends who came with you capable of feeling Death Energy's existence other than with their naked eyes?"

Roan shook his head. "No. In fact, even I am almost unable to feel it anymore. When I arrived on this side of the Universe, something came out of my soul, and my capability of feeling it is pretty much gone by now. Was it you who removed that black grain from my head?"