Bab 64: Chapter 64: Deadly Sin: Gluttony.

Evolution Energy, a source of energy which was awakened in almost every living creature once the giant black spheres appeared. Not much was known about them to the public other than it was what fuelled their abilities.

To be able to properly control one's ability then naturally they'd need to have somewhat of an understanding of the flow of energy residing in them.

"And that ability that my mother and sister used..."

"It was the result of their hard work... For more powerful abilities they are harder to develop which is why unlike most of other humans, theirs took extra preparation rather than them simply being able to use them from the get go."

Xavier nodded, based on what he'd seen, their abilities were without a doubt powerful.

The Buff that his mother gave was one thing, but his sister's reconstruction abilities. When he first witnessed it, it made his heart skip a beat.

The potential behind it was tremendous.