Dragon blood flows in everyone, maybe some of it is very thin, but the biggest thing we have in common is that this bloodline is still sleeping. From a biological point of view, the genes related to this bloodline have been sleeping and have never been activated (nonsense). We call this gene that cannot be awakened alpha gene, which means "the most primitive gene" (making it up again). Therefore, there is a family that has been doing research and experiments in this area since the patriarch realized the existence of this gene. This experiment lasted for more than a hundred years, and the bloodline of the tribesmen was successfully stimulated. However, because the human body has maintained a weak attribute for thousands of years, this constitution cannot withstand the impact of the activated dragon bloodline on the body. Although the body strength of the tribe members is stronger than that of ordinary people in a short period of time, it will shorten people's lifespan. So, the dragon appeared...
This article is purely imaginative and has no basis in scientific myths. Don't worry about some details~~~~~~~