Lord of the Underworld

The underworld is an independent world beyond the scope of the three realms. Our male protagonist is the son of a dragon and died in a battle to protect the underworld. In order to bring his beloved son back to life, the Dragon King used the Dragon Pearl he had cultivated for thousands of years to resurrect him. Because the magic power of the Ten Thousand Years Dragon Pearl is too strong, although the male protagonist was resurrected, he was unable to digest its magic power and became a useless person. What would be the best thing for the male protagonist? Without further ado, let's start a new journey. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.