[Hm. And there's a rustling that isn't hers. She pauses both from digging around in the satchel, and from explaining what she meant. Before, slowly, more cautiously, continuing.]

Yes. The Blood... it was not of humans. You give it to humans, and they become strong, and swift, and can do things they could never do normally; it heals wounds, and cures illnesses, or at least delays the effects. But it comes at a price, because man cannot handle the potential of the Blood. It calls out the Beast within all humans, and when their minds collapse under the pressure of trying to be something other than human, all that is left is the Beast.