I Used Yaksha's Legs to Run Away at the Beginning

The judge of the underworld gave Du Ning, a stupid scholar who couldn't even pass the scholar examination, a judge's pen and an exquisite heart with seven orifices to help him embark on the path of spiritual practice. Du Ning originally thought that the journey of spiritual practice would be about satisfying grudges and making enemies, but he did not expect that monks obtain magical powers by working for ghosts and gods, but they are just tools used by ghosts and gods to satisfy their desires! Fortunately, I can directly install their organs for practice, Du Ning thought. However, wasn't everything he relied on for practice given by others? Can he really be free? (Upgrade flow + Chinese underworld legend + Machiavellian strategy + group portraits)