"A magician never reveals his secrets." An evasive tactic, sure, but also well enough telling Stiles he won't be getting that answer out of him any time soon. The mechanics of how he makes things happen aren't nearly as important as what lengths people will go to, to get what they want. That's how this had started, all those years ago. An experiment. And now...well, now here he was.
He shifts slightly and leans a bit forward on the table, "I simply require a task be completed. The task varies from person to person, desire to desire. The bigger, more complicated the want, the bigger, more complicated the task."