Harry Potter Moment of the Week #7

This is a meme hosted by Leah Woods over at Uncorked Thoughts. The aim of this meme is to share with fellow bloggers a character, spell, chapter, object or quote from the books/ films/ J. K. Rowling herself or anything Potter related!  This weeks is: Dumbledore's Army vs. Inquisitorial Squad, who would you choose? Pretty obvious there ain't it?