The Immortal Emperor's Son-In-Law Is Invincible at the Beginning

Ling Xiao died in battle, and when he opened his eyes, he was already in the Jiuxiao Immortal Realm, becoming the "quasi-immortal emperor" who had just overcome the tribulation and ascended to heaven! He thought that he would be happy and happy from now on, but he was hit in the head by a marriage certificate - the supreme existence of the fairy world, "Tiandao", personally granted him a marriage. He must marry the empress of the demon world, otherwise his soul will be lost!