"I will definitely not leave unless you return the Saint Heir to me! Either you kill me!"
Yuntian's aim is to rescue the Saint Heir. If he does not rescue the Saint Heir, the Brotherhood will never have a chance to rise again.
Back then, the Saint King merely learned a little bit from the Future Book and almost became invincible in the world, requiring the combined might of several major righteous sects' experts to defeat him. If the Future Book reappears in the Human World, he believes the Brotherhood can rise again by relying on the mysterious cultivation techniques recorded in the Future Book, fulfilling their doctrine's vision of a utopian world.
Jiang Xiaobai would never hand the Saint Heir over to Yuntian. Yuntian is willing to pay any price to rescue the Saint Heir, which shows the significance of the Saint Heir. Jiang Xiaobai would absolutely not let such an important person go.
