Son-in-law Celestial Emperor

As a young man with a mysterious seal, he was sent to a remote southern wilderness to be a son-in-law due to unjust treatment by his family. On his wedding day, the seal within him was unlocked, and he began to control the ancient tomb of the ages! Strong individuals from all realms were buried in the tomb, and the young man in charge began his path of becoming stronger by digging graves! "You're a martial arts genius? Let me dig up the tomb of a martial god!" "You're a master alchemist? Let me dig up the tomb of a medicine saint!" "You're the son of a divine emperor? I have a bunch of divine emperor tombs here!" "You're the most despicable person in the world?... You win, I'm leaving!"