I'll Accept a Yellow Immortal's Request for a Title, but You're Just a Huge Rat

It all began when a rat monster sought a title and was refused, setting off a chain of bizarre events. Feng Wuxie has lived foolishly to this day, never knowing that his grandfather had long since paved a way out to help him escape his destined calamity. His grandfather’s joyful death, and how closely it was tied to him, have always been a mystery. But what is meant to come will come. There’s no escaping it. The vicious corpse-chasing ghost of the Yin Hou Altar insists on taking him as a disciple for no reason at all. Meng, the spirit medium who keeps a short-lived ghost baby, risks her life to protect him. The old Daoist who makes ghost puppets does everything he can to kill him. Even the rat monster that once tried to take his life after being denied a title has become his guardian spirit. Each has their own agenda, all plotting in secret. With the Gray Family Immortals helping him, he sets out on the path of slaying ghosts. From then on, every demon, monster, specter, and fiend falls beneath his blade, its soul scattered forever.