Review Detail of ISuMin in The First Vampire

It's the most interesting novel of this batch so I hope it will be picked. It's just that in 40 chapters we see a lot of disadvantages of being a vampire, but the only advantage he has is that he is a relatively harder to kill. (+ he can barely raise his knight level through drinking special and difficult to get kind of blood) MC doesn't have any canonical powers, so he can only barely be called a vampire not to mention a progenitor.