"Defensive magic is one of my favorites," Harry says, and if Schön has any magical senses of his own, he's likely already spotted the multitude of protective spells woven directly into Harry's leather duster, never mind the shield bracelet on his left wrist. "Investigative stuff isn't against the rules either. Tracking spells and so forth. Mostly they're just worried about time travel, mind magic, necromancy, and transforming people."