Destroyer of worlds

Zara is the daughter of Death. She has a best friend who is a wizard name Michael, he helps her keep a part of herself locked up. If unleashed she has the ability to start the apocalypse and end the world. Zara is also the mate of lucifer, it was written in prophecy that together they would be unstoppable. Lucifer will stop at nothing to get her, but with her father and Michael in the way it might be more difficult.