The black cat curse

Once upon a time...No! We are not starting the story like that! Anyways, in a world where the modern world is mixed with fantasy, heroes and villains there lived a family of white cats one of the most powerful hero families in the world until one day they made a deal with a powerful god to give them a child that is on the same level of a goddess but when the twins were born the family mistook the black cat as a curse throwing her away like a broken toy and using her like a punching bag now they have trend there most powerful ally to one of the most powerful villains with a undying thirst for blood and to hang there bodies for the whole world to see so they can watch as the hero's slowly tears themselves apart.