"Maybe if we set sail," Magnus theorizes. Yes, Peter Pan can fly, but Captain Hook had managed to avoid being killed by Peter, hadn't he? Maybe the ship had something to do with that. Or sheet numbers. Would the lost boys be able to follow?

How come Magnus had never heard this version of the tale? It upsets him that he doesn't know exactly what to do.

"I can set up some shields, with my magic. Maybe that will slow him down a touch."

He doesn't doubt for a second that Pan's power is greater than his, at least on Neverland, but there's a chance, isn't there?