Yang Xin was a twisted human doctor from the Primordial Era.
During the Primordial Era, among countless powerful races, the Human Race was a very inconspicuous group, utterly incomparable to the Angel Clan or the Demon Clan.
But since the Human Race had survived into subsequent eras, its overall strength clearly could not have been too poor.
Yang Xin had been born into such an environment.
In an environment where powerful enemies surrounded them and dangers beset the Human Race, he devoted himself to conducting research on other races.
Angels, demons, and individuals from many other races were all captured by Yang Xin and subjected to electrical shocks for research, so he could find their weaknesses or seize their special abilities and attempt to transfer them to himself!
He also conducted electrical-shock research on many fellow humans, attempting to modify the Human Race. Unfortunately, he discovered that although humans had no particularly powerful racial abilities, their overall capabilities were very good across the board, making it difficult to substantially improve the potential of individual humans through research and modification.
Of course, Yang Xin still put in considerable effort, using electrical shocks to create many specially modified human legions.
Some human warriors, after becoming his patients, were directly transformed into mindless killing machines and added to his slaughter legion.
Besides his slaughter legion, Yang Xin also controlled many modified legions, making him a considerable fighting force within the human camp amid the chaos of the Primordial Era.
However, this fellow had little of a good reputation even among humans.
That was because he modified quite a few human powerhouses and brought them into his legions...
As a result, many human factions hated him with a vengeance.
The problem was that he controlled so many legions and had quite a few Primordial