I thought this would be an interesting topic to post and discuss about. So, post the magic system you use in your story/stories or make one up right now. Does it need aides? Like a wand or a book. Can it be learned or is it inherited by bloodline? Does it appear at random in people? Where does the power come from? Are there many types of magic or just one? Does a large number of people use it or only a selected few? Is it exclusive to a race? Does it have a name? How does it affect the world in which it is used? Can you give us some examples of it's usages? Can you tell us which character(s) uses it? Ok, so I'll start. One of the systems I made up, has it's basis on the eyes. All the magic comes from the eye (one or both). It doesn't have a discernible origin but it does run out, by that I mean that it dies out with age or usage. There aren't any types of this eye magic (or "eye ability" like I like to call it) but there are various effects. For example, look at a thing and it combusts instantly, or microscopic vision. One character even changes personality when his eye color changes. Curiously, most (if not all) the people in the same world have heterochromia (different eye color). Most users of eye ability attend a special school to learn how to use their powers properly and have control over them, otherwise it could lead to accidents or misuse.