Ghosts Return, Others Command Them, I Become a Buddha

Chen Xuan, a worker chosen by fate, is buried beneath a dilapidated highland Buddhist temple during a trip and accidentally transmigrates to an unfamiliar world. He thinks that, as a transmigrator destined for greatness, he will rise to become a domineering hero and conquer the world. Instead, he spends twenty years in a rundown ancient temple. Just as he's getting ready to lie flat for good, the world suddenly goes haywire. He encounters a strange group of people right outside his own temple, and everything begins to change! System: Congratulations, Host. You've finally entered the main story! The Buddha-Apotheosis System is now bound to you. Ghosts and monsters are about to return. Get ready to harvest merit and attain Buddhahood on the spot! Chen Xuan: What? Ghosts and monsters are coming back, and you expect an ordinary person like me to harvest merit? By chanting sutras? PS: No romance. System novel. Although the protagonist is a monk, he isn't a complete saint and can be a little selfish at times. Some classic characters will appear, but they only share the original characters' names. Their personalities have been changed, so please don't read too much of the original characters into them. A moderately satisfying power fantasy with some mysteries left unresolved. Please don't overanalyze the finer points of the plot's logic. I recommend setting your brain aside halfway while reading; otherwise, I'm afraid you'll curse me to death, and then there'll be no one left to curse me.