nephilim of the past

years and years ago, there was once a race called nephilim a race born from angel and demon this race was powerful since they can wield both angel and devil magic. this race was dangerous until one day a child was born that was powerful even among the nephilim. god eventually got news of the child's birth and killed all of them accept 1 find out how this boy will over come his challenges and survive being the last of his kind (authors note) this was going 2 be a jujutsu kaisen fan fic but i changed it so sorry i just thought that the story I'm going 2 do would be more interesting so sorry.