Prehistoric: Become the King of Hell at the Beginning

A month ago, he unexpectedly came to this world and found that he had become the King of Hell in the ghost world. He was still very excited at first. After all, this King of Hell is the commander-in-chief of the entire underworld, and he is also a first-rate existence in terms of heel and power. However, as time went by, he also understood that the world he was in now was in the prehistoric era, and the underworld was even newer now, and he had no status at all! "Dingdong, do you want to bind the system?" After hearing the prompt, Zhou Yin rolled his eyes and made the choice without any hesitation. "Congratulations to the host, the binding is successful!" "Since the protagonist is waiting for this system to be opened, we will compensate the newbie with a gift package*1." "The system issued a mission: to unify the underworld." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.