Fantasy: People Are in the World of Cultivating Immortals, but the System Is Late

[Travel + System + Old Sixth + Slap in the Face + Funny + Multiple Time Travelers] Protagonist: "Who is the peak in the creation of the world? I am the only one in all the worlds." One knife can open up the world! The second sword can destroy the world! Protagonist: "System, why are my parents the great masters of the Hongmeng Ancestral Realm? My eldest sister is the tyrant of all realms? The female disciple I have accepted will conquer all realms in the future? Then why do I work so hard to do system tasks? You are telling me this after you have reached the master realm of all realms? Did you tell me earlier that you still need to work hard to complete the mission? Can't you just let me lie down?"