[quote=@Wraithblade6]
[@Witch Cat] Thanks for the effort, but I really don't like it. First, i feel like making this legend about Lilith is misogynistic. You could probably equally develop a myth starting from Kain. Secondly, how can you have "alive" vampires? You can't make life if you are dead... then you also get the problems with half breeds and quarter breeds, and eventually vampires get bred into non-existence. Lastly, it's just not right to be both immortal AND be able to have a family. That causes population problems.... and I don't like having two specific kinds of vampires either. :P

But that's just my opinion.

[/quote]

I hate to bring in preexisting properties, but this sorta reminds me of JJBA, with the talk of a family of immortals. In the show, a really long time ago, a bunch of superpowerful beings roamed the Earth, think vampires+. They needed to feed, but they were careful not to overbreed due to immortality and food availability. Then this fucko Kars gets born, thinks: Man, look at this mask im so cool and more powerful n shit. But, he needed much more food. Like a lot more. The rest of this society tries to kill him because he and his rebel friends will eventually wipe out all life on Earth. But due to his ability, he killed all his people. 

Long story short, a family of vampires could lead to problems with feeding and population.