I Raised the Yandere Villain Empress

What is the experience of being betrayed and given to death by a disciple who has been raised with all his heart and soul? Exhausting his cultivation to finally obtain a chance to be reborn! In this life, he's become corrupted. What's the point of helping the heroine? Since I've come to become a villain, I'll do it to the tee! As long as I'm strong enough, I'll be able to win!