I Dominated the Age of Dinosaurs

I traveled to the age of dinosaurs and was a little panicked. I awakened the system, but I could only play support. I obviously didn't have any output, but I unknowingly ruled the entire ancient era. My name is Li Zisan, an old man who will be single for hundreds of millions of years. PS: The first world, the ancient dinosaur era, The second world, the Three Kingdoms, leads the dinosaur army to fight against the Three Kingdoms. The third world is undecided.... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.