Study Monster Cultivation System - Chapter 39 - 0 Young man, you are overthinking it.

He is the ruler of the mercenary realm, an overlord that gives headaches to the leaders of any country! For the sake of his friends, he’s willing to sacrifice himself; for the sake of his family, he does not hesitate to spill blood! He is a dragon, one that soars above even the highest of heavens. He’s a power that advances triumphantly through unstable situations, stirring up both the winds and the waters.

- Description from Novelupdates

Upon awakening, the apocalypse's metaphysics master, Nan Li, found herself as the lost Sixth Miss of the Anyang Marquis ManorThinking it would be a story of abuse, she never expected all five of her brothers to dote on her one after another!Nan Li shouted, “Stop pampering me! In fact, I can do everything, from capturing ghosts, exterminating demons, divination, physiognomy, to healing and saving people. I'll lead the family to rise in power and wealth!”Accidentally saving the Ninth Prince, who held great power in the court, Nan Li found him renowned for his cold and unfeeling demeanor. However, he became utterly addicted to pampering her and refused to take other concubines.The scheming and malicious women were angry, shouting, “The prince lacks heirs, how can this be allowed?!”Nan Li pointed at the line of little ghost-catching disciples and said, “I'll cure your poor eyesight!”The Ninth Prince lifted her in his arms and said, “We have a bit of thin property that needs to be inherited, so we'll have a few more children.”Later on—Nan Li looked at the continuous immortal mountains and the room full of treasures, her mouth twitching, “I thought you had a throne to inherit, what's going on now?!”

This is the tale of an earthling, who transmigrated as a dying third-rate god but somehow rose through the ranks, gaining followers and eventually causing the Fourth Great Apocalypse.