C109 The Secrets of the Strigoi

Lei Yu didn't have any excuses to tell them directly, "It's the blood of a god, devil, or dragon; the blood of a god needs to be at least at the Angel level to be used; the blood of a demon also needs to be at the Devil King level to be used; the blood of a dragon requires at the Elder level of a Dragon and above to be obtained; of these three types of blood, the dragon's blood at the Elder level