Scorpius huffed out a laugh. As though he were any better, nervous wreck that he was. "I nearly got mugged when I first arrived. If Draco hadn't happened by when he did-- well, very likely I would have stood there with my shield charm up for however long it took them to be bored and wander off." Hopefully by the time he reached Al's age, he'd have his variation on the spell properly polished up. He was just lucky it had worked against physical attacks.