In the past, when the Tree Goddess was heavily injured and on the verge of losing consciousness, she had set a defensive seal around her. At that time, Yinmu was still a Mortal Fairy expert.
After countless years had passed, Yinmu's life force gradually weakened which allowed the evil energy to invade his body and turn him into an evil existence. It was then that he started planning to steal the Tree Goddess's godhood.
Yinmu was being burned. He pleaded for a while and shouted angrily several times, going out of control. However, as the golden light continued burning him, the black luster on the small silver tree started disappearing gradually and turned into a black smoke which dissipated in the sky.
Yinmu's tyrannical and brutal nature also disappeared along with it.