Guest Stars Sean Maguire as The Dark King Spencer Daniels as Charlton Aaron Jennings as Hamish Bax Summer Fontana as Ash Michael Graziadei as Raylan Cortez Co Starring Alex Pepin as Centurion Emma Oliver as Fillory Kid #3 Kimi Alexander as Student #1 Alexander Lowe as Student #2 Amanda Burke as Peasant Woman Gabriel Jacob-Cross as Fillory Kid #2 Kayleigh Sullivan as Fillory Kid #4