Because he wouldn't just silently die! Therefore, at this moment, he made his move again. It was still that sacrificial will; to him, the Saint Demon's soul, even if resurrected, was just like a wild beast. And a beast can always be tamed, what he was doing now was akin to taming a beast.
It must be said, Yang Tianyou truly was a genius! An outright genius, he keenly perceived the emotions conveyed by the thoughts of the Saint Demon's soul, and that was anger! Although he did not know exactly what had happened, he knew that the Saint Demon's soul was angry for the Nine Heavens Demon King.
"Good, as long as you cooperate with me, I promise to destroy this body for you. I can vow by my Dao heart, without me, you are merely a beast acting on instinct, you would never be able to match up to your brother who has a consciousness. I know you can understand me, now tell me your decision!" Yang Tianyou deployed his psychological tactics and then spoke.