Apocalyptic Fantasy: Kill Hundreds of Ghosts and Awaken the Supernatural Powers of the Heavens

Hello! My name is Ye Ning. I actually traveled to an era where demons and monsters were rampant. Introducing a mentally retarded system made me an ordinary ghost slayer. But now, I'll do it directly~ There's a girl trying to kill me! I'm about to get cold... The introduction is short and weak, please move to the main text. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.