C623 Sanguinis Radix

What Xiao Yi was training in was a martial skill he got from God Cain.

Only Xiao Yi could cultivate this set of Strigoi cultivation technique. In other words, as long as Cain's direct bloodline could cultivate it. As for the reason, it was his bloodline. Xiao Yi was from Cain's direct bloodline. Thus, he was able to practice this cultivation technique. As for the other Strigoi