An Ogre has Layers - or is this a Cave Troll from Lord of the Rings? In any case, you have a fun dinner scene and then you and Ron are on the job. Shoot pots, destroy everything, and then send a rat through the maze to get both sets of poisonous gas to stop. Pull out the lego pieces on the left to build a stair. Go up and use flames to burn the statue. Now assemble the pieces that fall to make a pitchfork.

Put the 3 chicken legs into the pond to get a shield piece. Next levitate the pitchfork by the mermaid and she moves the globe. Put Ron on the bench and then have Harry hit it to make it go up and get the coins.

The painting won't let you into the girl's bathroom because you are both boys. Go figure. Harass the wizard in the painting enough and he'll turn you into a girl, and you can go through.

OK it's fight time. Be careful here. Gather as many coins as you can but avoid dying of course :) Keep an eye on hearts and grab them when you can. Light the lamps to get a shield. When he's throwing things at you, use your levitate spell to catch them and throw them back. For the final blow, drop a pipe on his head. Once you do, the level is complete, so make sure you've gathered everything up before then!

3 pieces
91% to True Wizard (I didn't gather enough :) )
Stud total - 301540
Student in Peril

Gold Bricks:
11 - level complete
12 - student in peril

Lego Harry Potter Walkthrough