Defeating the hinky punks

Pick up the lumos duo spell book.then shine lumos duo on the invisible things (hinkypunks)wait till they turn soilid and then finish them off with flinpendo after you finish them all off another set will come out do the same thing .then after you get rid of them shine lumos duo on the balland it will hit the mirror move the mirror left twice and then the eye will close and te gate will go up.dont wory i had the same trouble i found it on another website but i cant remember wat it is im havin trouble on the carpe retractum challenge i cant get out of the cicular room