Time Travel: My System Is Actually the Immortal Emperor

[Slow heat + fantasy + system + single female protagonist] When he woke up, Wen Heng found that he had traveled back in time to the body of a young man who was on the verge of death and gained the unique immortal system. But this system only gives broken objects... Only later did Wen Heng realize something was wrong. Why were the items given by the system so powerful... Later, Wen Heng discovered that this system was actually the incarnation of the Immortal Emperor, and this Immortal Emperor was actually himself? From then on, Wen Heng embarked on a path to immortality that reached the heavens, killing gods when gods stood in his way, and killing Buddhas when he stood in the way of Buddha, suppressing the heavens! Demon Emperor: "You can't keep this kid, go quickly to encircle and suppress him!" Demon Emperor: "How is it possible? How can a great emperor of the human race appear in this era!" ... Wen Heng: "You'll come over here and die!"