I Became a Saint and an Ancestor in the Forbidden Land of Demons

I, Qin Tian, enter the Immortal Palace Eat the fairy fruit, shed your mortal body, and rejuvenate your youth! When he returned to the present world, he found that there was no trace of the fairy in the world, only the city of Purgatory remained. This capital city where mortals live... Is actually a forbidden land for demons! I am at odds with the devil! So what if there is no trace of the immortals and gods? I will ascend to immortality in this forbidden land, become a saint in this Jedi land, and become an ancestor in this purgatory! I want to create a bright and sunny sky in this dark place!