Anyone can initiate the experience by tapping “Curtain Call” in the effects tray on Portal. You can then select one of three locations from the menu to visit: Hogwarts Great Hall, the Ministry of Magic or the Edge of the Forbidden Forest. When the lights come up, each person on the call will embody a character from the show with a unique spell, which is assigned randomly. Simply nod your head or tap the screen to cast it and watch as your friends marvel at the magic.