Souls

"What?" Nan Tian looked at Helion with surprise.

Even Yin was intrigued as she glanced towards him.

"You see, the souls that they use for the Soul Fragment weapons are simply too small to be the full soul. Even when they try to extract it with 100% efficiency, the 'size' of the soul is too small. Think of it as inserting mana into a puppet and controlling it that way, you only need a small strand of mana for that puppet to move. It's the same situation with the system and our souls. Think of the system as the mana and our soul is the main body. We pilot our physical bodies and when we die, the 'souls' that we find are just the tiny spark we used to pilot the body while the main body of the soul is under the system's ownership.