The apprentice studied the scrap, then took Toshiko's recently vacated seat, one arm propped up to support her head. "So because your affinity colours your mana when it's used, it can be linked back to you. How, though? Most scrying in western traditions seems to use water or mirrors... something that can hold an image."

Maybe a magic circle of some sort? Was scrying the sort of thing that could be improved by having multiple people working on it? Not that they seemed to be a trio with particularly useful affinities for this sort of thing, with all of them tending towards spells that would be better at causing damage than actually finding something out...