I Am a Very Serious Vampire Mouth Person.

After time traveling, Xu Yuan became a vampire. You can use blood to transform others into blood relatives and get feedback from them. Xu Yuan looked at the dying beautiful girl in front of him: "Are you willing to be my blood relative?" … What does it mean that if the strength gap is too large and the transformation fails, more pure blood is needed? [Current World: Demon Slayer: Kimetsu no Yaiba]