a dream come true?

BO7 an artificially made human was terminated due to evolving too quickly, and now he possessed a ten year old boy who was named as Yadev, an abandoned boy who was physically and mentally ab*se in his life. now he was in full control of the kids body and was getting sent to the demon king's castle as a 'sacrifice', but in reality, the demon king said this to adopt a child since he couldn't artificially made one. and it was impossible to make a kid, when he have a darkness affinity, and having dark and a dangerous ability could kill the kid, and since the demon king was too afraid that he would scare the kids, so he selected a few orphanages choosing one kid and putting them on a test