What kind of experience was it?

I want the name of the novel The female protagonist of the novel was from the Dark Shrine, while the male protagonist was from the Light Shrine. The female protagonist searched for the Sarira along the way and slowly became stronger. In the end, she broke the rules of heaven and earth and had a head full of white hair. The female protagonist gave birth to several children for the male protagonist. She sent the children to the male protagonist and his son before leaving. The male protagonist waited for the female protagonist for a thousand years. Later, the male protagonist and the female protagonist reunited and went to a higher continent to find their children together.