“What was that?” she finally whispered. Her throat was raw from all the screaming and now the vomiting. “My magic,” Theon answered. “To give you the Mark, I had to pour some of my raw power into your veins so that your own magic would become overwhelmed by it, and, in turn, recognize it. Your body is trying to adjust to my magic in your system, along with the bond that is starting to form.”

