The Divine Throne: I Became the Protagonist's Sister

When I woke up, I found that I had shrunk and became a baby waiting to be fed. Life was going on as planned. The system that suddenly appeared told her that this was a novel world, and Bai Nianxing had to work hard. But she discovered the hidden secrets of this world. Who is the end of the glorious era? What kind of opportunities existed in the prehistoric era? What's even more surprising: The Demon God Emperor is my grandfather! The elf I saved casually was my grandmother! Okay, okay, there is something else in this world that I don't know.