Monsters, Get to Work!

A good-for-nothing second-generation immortal who can't store innate energy spends his days neglecting his duties, supporting the entire sect by selling jewelry. One day, he's chosen as the next sect leader and, wholly unwilling, heads down the mountain to gain experience (and grow the business).

From then on, ghosts and monsters in the mortal world live in constant fear, afraid that the boy with a vast collection of magical artifacts will capture them and put them to work.

The immortals willingly help him expand his territory, repaying their debts while relying on him to earn the power of faith.