How Come You Become an Ancestor When You Sign in the Innate Taoist Body at the Beginning?

Traveling to a world where gods, ghosts and demons coexist, he is accidentally trapped in a mysterious cave, obtains a mysterious system, and blasts open the stone door with a palm, only to see hundreds of people outside the door kowtowing and shouting "Ancestor!" "Ding! The host signs in at the retreat to obtain the innate Taoist body!" "Ding! The host signs in to get the holy elixir!" "Ding! The host signed in and received the best spiritual energy!" … After being in seclusion for thirty-three years, once he was born, he looked down upon the world and sent a sword from the west. Who would dare not to obey?