"You already know my father's name. My mother is Narcissa Black," Draco is telling Hermione, whose expression of dawning wonder is similar to that of someone tasting chocolate for the first time. His eyes are fixed unblinkingly to her face. "The Houses of Black and Malfoy are the two greatest and most powerful dynasties in Hell. Obviously, I'm a pure-blooded demon. So is Theo here – he's from the House of Nott. We're of the full blood, but it's possible for half-bloods to exist. Half-bloods," he says with scorn, "are the product of unions between demons and humans, and they're really nothing more than glorified humans; they can do magic if they try very hard, but they have only a fraction of our powers. They're quite common. In fact, there's even one living not too far from you."