Before we begin I would like to apoligise for my spelling i am not the best speller as you will see. Now on to Harry Potter! Harry's signiture spell is Expelliarmus- the disarming spell. When used with the proper words and hand motions this spell will make the other person (or thing) drop whatever wepon they are holding. It is vary usefull to know when in a dule or even a battle. Fun fact Harry used Voldemorts favorite spell to kill him!