Chapter 2 - Can't think of a way!

It's been months and I did a lot of research into how we could splice a demon's DNA and hybridizing the genetics of a demon and a human, well a lot of demons. I tried researching super soldier serum, helix, apex, chimera but nothing is what I'm looking for. I tried real life methods too like transgenesis, xenotransplantation, genetic engineering but it takes too long soo.. Can't do it. I tried to make this book as realistic as possible but I can't. I'm sorry guys, I think I have to use a system to make this story work. I really didn't want to use a system and make the protagonist work for is strength but real life research is a big hassle. Again I'm sorry. I will start the story now.