I remember seeing this one show, forgot what it was, but in it this kid would always lie, and one day he had a curse put on him so that what ever lie he said, it would come true. So when he lied that he had a teacher's snakes in his backpack so this bully wouldn't take his backpack. The bully didn't believe him since he knows he is a liar all the time, he opens it and there are the snakes. Out of nowhere. Eventually he lies about a fire in the school and a mummy coming to life for some reasons, and they happen.
Well I was thinking...this could be a very powerful thing. It is basically what you say happens.
"I have 6 thousand dollars in my pocket" poof, 6 thousand dollars.
They showed that this power was all bad, hell no, it would be a great power. Just have to watch what you say.