That's None Of Your Business.

"Both," Soverick answered.

"You can't perform both at the same time," Mihila said.

Soverick pointed at her and said, "You mean you can't."

"No one can." Mihila said back.

"Wrong, you mean no one you know can."

"Okay then. Maybe you are right. But why are you doing so?"

He has told them this much so that some of their curiosity will be satiated. He was performing the two stages because he needed a large amount of vitality but vitality is too volatile to be stored. Vitality can be considered as the potential of a cell, only when he needed it should it be available. He currently lacks an organ to store it, hence another reason for the creation of a vitality core. His decision to create a very large vitality core requires him to output more and more vitality, he had to maintain his progress which needed more vitality. The increase in the difficulty of what he wants to achieve demands it, but he didn't have to tell them that.