It does matter what was used, because what was used will tell us something important about what we are dealing with. This isn't normal magic, Alucard.

[And maybe she's being a little bit more blunt than she ordinarily would be, but — well. Maybe everything Trevor has always said about coddling is starting to make an impression on her.]

It will narrow the possibilities to a pool of possible suspects. Or at least give a better idea of what we are looking for.