((It depends on what her morals are, and what he needs when he cashes the favor in. Not reassuring, I know. Schön isn't usually the sort to have friends, but he can't honestly say anymore that he doesn't have any, either, so there's that.))

"No time limit, no. I need only a strand of your hair, or some other such trifle, to attune the spell to you--and by extension, the world from which you come." His voice is soothing, his smile pleasant. Why make the hard-sell pitch when a nice, soft one will do?