Maybe with it, his split personality could be fixed. Maybe this rune was destined to be his all along. He had 15 personalities originally, seven negative and seven positive leaving only his rational one alone in the middle.
The negatives were bloodthirsty, the positives were kind and rationale was logical.
People acted on emotions and it was also the reason why mankind rose. Emotions, it was the boundary line of animals, monsters, and humans.
It was detected that people exuded special energy when they felt emotions. It would differ depending on the emotion. Some were violent while some were gentle. It was very unstable and dissipated in a short time.
He named this energy emotional value. Absorbing this kind of energy for the ordinary person was dangerous. Although it made his soul advance some traces of pollution were left. Fortunately, due to him having multiple split souls, the pollution was caught within the turbulence between them and was shredded and cleaned.
