You can not turn into a dragon, or anything else for that matter. You are, now and forever, human. Dragons and other fantasy creatures are exactly that: fantasy. If you mix fantasy with your magical practice, you are going to get fantasy, not reality. That is not to say that imagination is not useful. It certainly is a necessary part of magical practices. However, if you do not use it properly it will not serve you well.
The premise of magick is all about energy, visualization, and using your body as a conduit for energy. If you learn to use it correctly anything is possible but thinks such as that... never will exist. You never here about magick on the news or anything. If it was possible, it would be on the news. Same as controlling the weather. There are some outrageous spells. I honestly think in my opinion that only spells that works should be on the sight.