Professional Spoilers for a Hundred Years, but I Am a Passerby

Wen Jie, a street writer, stayed up all night to finish writing his medieval masterpiece, and then opened his eyes and entered the book. The good news: He wrote this book for five years and remembers every word. Where the treasure is, who will rebel, which battle can be won - he knows it all by heart. Bad news: He's not the main character. He's not even a supporting character. He is the "crowd" in the sentence "The crowd burst into cheers" in Chapter 237. You start with a sack and not a single coin on your body. Your only asset is knowing where the world will be in the next ten years - but this cannot be used as a living. Wen Jie decided to live in peace and rely on his own plot to survive in this world. As a result, he found that the plot he wrote began to go astray—— The treasure he remembered was dug up in advance. The "future big shot" he had bet on was grabbing steamed buns from him on the street. The loyal knight in his mind betrayed the real protagonist. What's even more terrible is that a rumor he made up casually was widely spread throughout the kingdom as a prophecy. The princes and nobles knelt before him and begged him for guidance. Wen Jie: "... I really just said it casually." Everyone: "Master is so humble!" Wen Jie lowered his head and looked at himself - his clothes were in rags, his pocket was cleaner than his face, and he was still fighting over half a piece of black bread yesterday. Just me? Master?