Heaven-Defying Underworld Emperor

He is an archaeology intern on Earth. While escorting a divine treasure by chance, he transmigrates to the Nether Spirit World and is reborn as the son of a noble family, embarking on the path of nether cultivation! Since he’s here, he might as well cultivate in peace and swear to become the Nether Emperor! What, you want to steal my divine artifact? I’ll wipe you out! You want to take my woman? I’ll castrate you! You dare stand in the way of me becoming the Nether Emperor? I’ll cripple you!