In this game you come up with a name of something (it can have anything to do with the Harry Potter books-people, spells, places, artifacts, etc...). Then the next person has to come up with their own word using the very last letter in your previous word to start their own word. E.g: Crookshanks - then you'd use the S to make up your own word, like Stupify. Okay here goes:
Lupin