God-Level Sign-In: Invincible Starting from the Demon Suppression Tower

Introduction to the work: My name is Chen Fan, and I have traveled through time. This world is too dangerous and demons are rampant. Fortunately, I have a "god-level sign-in system." "Sign in at the Demon-Suppressing Tower and get the Ancient Holy Body!" "Sign in at the Sword Tomb and get the Supreme Sword Intent!"... Before I knew it, I was invincible in the world.