okay, look. I'm going to tell it to you straight. I don't believe there is a spell that will work as effectively as you would like. The most effective method at better drawing skills is something I doubt you want to hear- practice. I'm a very young artist. I'm 15. But my work has been hung in various locations and I've won awards. I myself find drawing to be a great visualization training, because you are actually making what you picture, relatively tangible. Now I want you to get something straight. I am not bragging. I know there are many artists who's work would put my own to shame, but I have drive. If you are serious about art, than you will do the most fundimental, necessary thing: practice, practice, practice! Haha. Art is ambitious. It required passion and a yearn to do it well.
I'm going to give you the biggest tip, in my opinion, about art. Beauty is in the eye of the beholder. So don't worry about what people think about your work. Some people might love it; see a paint splatter as a magnificent and unknown world. Others would see it as it Is. A splatter if paint.
Develop a style, see what suits you. I am into realism and drawing mythical creatures. You could be into caligraphy, graphic art, abstract, whatever! Point is, take what you like about art, what you truley enjoy doing, and "run with it." :)