You cannot do spells to alter your appearance,change your DNA,or anything of the likes.
Magic that defys science or is too good to be true will not work.
It has nothing to do with strength,or how you do it.
You will only ever be completley human.
You can not grow wings,fangs,or any other ridiculous idea you got from the latest installment of 'Charmed'.
Sorry Dear but you cannot grow wings. Magic cannot change your DNA. If you still find this hard to believe then don't you think that you will see people flying around? You are in your early years and in that age most people can't figure out which way to go! And often tend to drift into the wrong direction! You may not still believe me or any of us. But that is fine as time goes on and you gain wisdom you will come to realize as to what is real and fake and what is right and wrong. But for now I recommend that you try the following links to help you in your path