Yes, the spell was necessary. No, they would not reverse it. If the professor wanted the spell undone, she would have to do it herself and face whatever consequences came her way. Although the hooded figures refused to dignify the professor's words with a response, they were not ignored. Every detail was recorded on the parchment.

The one with the parchment continued taking profuse notes as the woman spoke. Interesting topic. There was a right way and a wrong way to approach it, and for her sake, they hoped she chose the right way. While one of the hooded figures took notes, the other roamed the rows of student desks. Better choose your answers carefully, children!