Memory charms

Memory charms can be very usefull to wizards who want people to forget somthing. It is very important to the ministry of magic. The incarnation is obliviate, it can be reversed which is always usefull to St Mungo's Hospital. However this is hard to do and it has never been revieled how it works. We have a test coming up just so I have an idea how you are doing. A lot of the topics will be covered in the next couple of lessons and so I am going to ask you to revise. Use your textbooks as a resource, can you also come up with a mindmap that I want to see, which will help you revise.