MTL-Signing in to Millennium, my undercover identity was exposed

Synopsis

Lin Mo, a young man from the earth, accidentally crossed over and became a little undercover agent of the Immortal Sect in the Demon Sect. He was about to face a certain death situation at the beginning. Fortunately, he awakened the sign-in system. Sign in at the Gorefiend Square to get the Killer Demon Heart. Sign in at the Blood Demon Palace and get Nether Prison. Sign in at the Magic Artifact Pavilion and get the Prison Devil Sword. ... After silently signing in for a thousand years, Lin Mo suddenly became a big boss in the evil way, intimidating one side, but unexpectedly, his undercover identity was exposed...