"It’s a curious thing, magic involving the soul, is it not? You see, in a typical soul bond, the souls are simply that– bound to one another as the perfect pair. No other aspect of the body is a perfect match for the other in the pair. In a bond involving the soul and blood, the bond works similarly, though aspects of the bond must be sealed properly to preserve the overall health and wellness of the pair. Without a sealed bond, the pair wither and decline, usually resulting in death. Similar will happen to each should the pair be separated for significant periods of time."