This room is huge, and it needs to be -- it has a Cerberus in it. You know, those monstrous three-headed dogs that guard the gates of hell. Or, in short, that scary dog from the first Harry Potter book/movie. It's probably the same dog. Hilariously, I wrote this before I found out Hermione freaking Granger was on this team, so y'all just lucked out.

Either way, it wants to kill you before you can get to the door on the other side.

Either fight it or make use of the harp that's sitting by the door. Music soothes the angry beast, you know.