After they had completely dealt with the incident at the Perfect Lifeform factory, Yu Xian quietly returned to school and took his seat. The periods in the afternoon were basically all self-study ones, so he didn't have to spare his attention elsewhere.

He closed his eyes and carefully sensed the changes in his body. At the Perfect Lifeform factory, although Yu Lie and Xiao Cheng had been present alongside him and it had been very safe, he had never let his guard down. Because of that, he had not carefully checked the exact condition of his body. Now, he was free to perform a full self-diagnosis.

First were Silver Blood and Ultimate Source Blood. Although Ultimate Source Blood was transformed from Silver Blood through the Perfect Lifeform heart, the two remained completely distinct. 

So, two kinds of blood were now running in his blood vessels. They were...