Have the ability to make yourself suddenly intelligent in any subject. Particularly a good skill in school. If you were in a trigonometry class and you knew there was no way you could pass the class, all you had to do is click your fingers and suddenly your the brainiac when it comes to solving trig problems. You'd pass your class! Any subject from gym class to drama. And the information can stay in your head FOREVER. You'd be the best at everything.