"I didn’t think it could get any worse. What more is there than daily crucio and imperius curses? Merlin, was I wrong. He started experimenting on how to install a permanent imperius curse. One that he could activate whenever he wanted, for any reason. I thought I knew pain before..." he shook his head and the muscles in his arms strained as if in memory of the torture. "Several things didn’t work. I’ll spare you the details. By the end, he had found specific runes that he was able to combine with dark magic and bind it to the mark. He could call upon me from afar. Make me do whatever he wanted to. I was bound to his magic. By the end, I didn’t even know if it was him or me, saying the killing curses. They had become as easy as breathing."