The Great Sage Returns: I Start Gaining Points by Slaying Demons

[Journey to the West fanfic + lighthearted power fantasy + System + monster-slaying and leveling up] Who says your old Sun is a pawn? After being imprisoned for five hundred years, I accidentally bound myself to the “Victorious Fighting Buddha System.” Slay demons and monsters, earn merit points, and exchange them for anything! [Strength] Add points! One strike shatters mountains and rivers. I reign supreme over the Law of Power! [Speed] Add points! Upgrade the Somersault Cloud, surpass time, and roam the myriad realms! [Seventy-Two Transformations] Add points! Evolve the Three Thousand Great Daos and transform into a Chaos Demon God! Tathagata, you told me to escort that monk west, but you never said I couldn't take the chance to turn the Three Realms inside out! Demons and monsters, gods and immortals, all of them are just experience points in the face of my merit points! Fetching the scriptures? No, this is your old Sun's endless leveling journey!