Why Are the Immortals I Cultivate Called Demons?

Under the rule of gods and demons, all living beings suffer. Xie Rong, who traveled here, was forced to embark on a martial arts path leading to death. Good news: There is a system that can train any martial arts to the point where it shouldn't happen in advance. Bad news: consumes memory. When survival becomes the only criterion. He began to make choices again and again that even he could not remember.