Anubi

In acient Egypte, a group of demigod called the Anubii betrayed the god Anubis.For that Anubis banished them to a mortal live and a morthal death.After a few centuries the anubii became weaker and they visited a witch and asked her a spell to make them demigods again, but when the witch couldn't help them they killed her and drank her blood.After that they found out that the blood from a witch made them stronger and so they could live forever.They started to drain the blood from wiccans untill they got vanquishd by the Charmed ones.They appeared in the novel somthing wiccan this way goes.