Blast the cabinet, which will rotate to its red side; use Diffindo to make a ladder and climb up before a flame-dragon flies by. Once you've knocked both of them out, you only have Bellatrix to deal with.

Smash some trash cans to the front left to get pieces to build a fly; once in the spider web, a spider will come and eat it and leave you a little spider. Rear Courtyard. When you have broken the lock, use magic to open the cupboard and the student will hop out.

Throughout Hogwarts there are 50 students who need your help. Operate the winch to pull a black and red fish and the wall blocking you away.