|They've activated the self-delete! Nah, I'm just messing with you. |
Cain was the demigod son of Blibaal, goddess of blood and slaughter. It is unknown as to whether or not he was the first Vampire, but he was certainly responsible for vampirism being widespread, spreading it like a plague throughout the Shadowfel, or at least the Shadowfel equivalent of The Middle Kingdom.
To this day, there is a site in the Shadowfel called The Throne of Cain.