"That boy? The one we found who was still alive - he was his final attempt. And we couldn’t let him go back to his family, because Travers had finally succeeded. He could control him. So, we took him back to the Department of Mysteries to try and separate their souls," Harry choked back a sob, "we tried for nearly a year Draco - a  year! Our last, desperate attempt? It killed the child," Harry shook his head bitterly, "there is no way, Draco. Living horcrux vessels are fragile - look at Nagini. It only took a diffindo to cut off her head and destroy her and Voldemort’s soul both. I’m the only known case of a living horcrux surviving separation with the parasitic soul fragment - and it’s a total fluke that it worked the first time,"