Lupin, unlike those others who had engaged, hung back, wand drawn as he discharged spells at the monstrous beings. Stunners, Conjunctivitis Curses, Trip Jinxes, Full Body-Bind Curses... all to no avail.

"They're resistant!" he called out, familiar with this. Dragons, giants, and other such beings could shrug off the spells of even the mightiest wizards; clearly these creatures could do the same.