just show the kid star wars from the phantom menace to the empire strikes back, "first" trilogy is an innocent kid gets powerful and turns evil, the second trilogy is an innocent kid that vanquishes evil. and teach him that you can chose those paths or anything in between.
Watch The Magicians (2015) Online
The series centers on Quentin, a brilliant grad student chosen to attend Brakebills College for Magical Pedagogy, a secret upstate New York university specializing in magic. He and his 20-something friends soon discover that the magical fantasy world they read about as children is all too real – and poses grave danger to humanity.