I returned to Harry Potter for an action based scene to illustrate. This one gave me the opportunity to play around properly with rendering specific areas light and dark.
I chose the scene partly because I’d wanted to give drawing a dementor in silhouette a go, but found it far more challenging than I’d imagined. My first choice would have been the scene on the train at the beginning. In the end I settled for lots of grasping hands being blasted back.