I'm going to need the second one now

Someone in the castle is a traitor, but who?

We start out very Harry Potter and the goblet of fire. In a maze where the last wizard standing passes; this being the final exam they needed to pass in order to graduate from the Guild as a wizard.

But much like Harry, things get a little bit out of hand annnnnd we end up in the hospital wing where we met Dumbledore. ... I mean Emsworth.