"Legend has it that the first vampire was Cain, cursed to be an immortal who must suck fresh blood for his sin of fratricide. Cain is the origin of vampires, the beginning of this bloodline.
Under the drive of loneliness, Cain used animal viscera and his own blood to create the second generation of vampires, which is believed to consist of five individuals. There are few historical records about the second-generation vampires, and I don't know much either. Only that the second-generation vampires bred their own 13 descendants, the most powerful third generation in vampires. They became the main leaders of several generations of vampires afterwards. They established their own clans, and as a result, the thirteen clans were born. These 13 leaders discovered that the blood of the vampire clan could grant immortality to mortals and widely embraced them to enhance their own and their clan's power. Thus, they began the legacy of the wicked bloodline of vampires.