Besides being a shittily colored light source, this ball of light is a basic spell that the officials use to light the school with. It looks like this one is losing it's shimmer though, much like the one in the hallway.
Did I mention that this is wizard stuff? This is wizard stuff.
The rest of the room is pretty much empty. There's a SMALL CHEST by a TWO DIMENSIONAL DOOR. You've never been in this room before so you don't really know what's behind it.
Next to you is a barrel that is full of..!