It's Tragic That I Became a Slayer as Soon as I Was Born!

My name is Li Fan. I was born as a "borderless waste" and destined to be the favorite snack of ghosts. They don't know that I have a "Book of Merits" in my head. Killing ghosts will make you stronger. I struggled to survive, killed the evil ghost, destroyed the ghost king, and finally ascended to the sky on the ghost emperor's corpse. Then, I saw the truth - in the sky, the gods were using the rise and fall of civilization as a chess game. The ten thousand ghosts wreaking havoc in the world are just a piece of paper issued by Heaven for "reasonable massacre". Now, it's my turn to shred this approval document. Even if you are fighting against the God who makes the rules.