[No power levels + no heroine + a Three Realms setting + lighthearted with no contrived tropes] Read at your own risk!
A monk lives by the stream at Clearwater Lake. Having seen through worldly attachments, he has cast aside the seven emotions and six desires. With nothing much to do on an ordinary day, he patrols the mountains, admires the scenery, and recites sutras. He is quite content with his carefree life.
If you ask about the young monk's past, the old monk will only say, “That night, snow fell heavily and the wind bit cold. I was meditating in the monastery when I suddenly heard a baby crying...”
And that's how it was. He wouldn't trade this life for all the gods and Buddhas in the heavens. But one day, he inexplicably received the mission of saving the world. Well, no more talk. This humble monk is off to save the world!