I recommend friends who don't have a book to read take a look at this "Super Civilization Evolution Lord", a super imaginative book.

The protagonist has a lord system, the current level is a prehistoric civilization, and he can only have a small territory in the real world and go to the prehistoric world, collect energy in the real territory, and complete the task of conquest in the prehistoric world, see how the protagonist uses his advantages to become a real starry lord and promote the level of civilization in the territory beyond reality.