vampiros blancos consumen aura

Most actions of magic aren’t any more terribly mysterious or complicated than physical actions. In fact, a lot of what happens in magic can be described by basic concepts of physics. Energy can neither be created nor destroyed, for example—but it can be moved. The seething aura of life around the young scion represented a significant force of energy.
A very significant source.
Someone had been siphoning energy off of Bigfoot Irwin. The incredible vital aura around the kid now was, I realized, only a fraction of what it should have been. Someone had been draining the kid of that energy and using it for something else. A vampire of some kind? Maybe. The White Court of Vampires drained the life-energy from their victims, though they mostly did it through physical contact, mostly sexual congress, and there would be really limited opportunity for that sort of thing in a strictly monitored coed boarding school. Irwin had been attacked both frequently and regularly, to have his aura be so mangled.
I could sweep the place for a vampire. Maybe. They were not easy to spot. I couldn’t discount a vamp completely, because they were definitely one of the usual suspects, but had it been one of the White Court after the kid, his aura would have been more damaged in certain areas than others. Instead, his aura had been equally diminished all around. That would indicate, if not conclusively prove, some kind of attack that was entirely nonphysical.