Catching a Murderer in the Spiritual Realm: I Rely on Folk Customs to Become a God

I detect conspiracies with my punishment, slay evil spirits with my spiritual eyes, and protect my loved ones with my obsession. Others are afraid of ghosts, but I control ghosts; Others avoid evil, but I seek it. From abandoned hospitals to mass graves, from folklore mysteries to battles in the spiritual realm, let's see how I can sweep through the spiritual realm with a book of mysteries and become the only murderer in the world!