Everyone (or nearly everyone) in a work has magical powers.
In the real world, people don't have magical powers. In order to maintain suspension of disbelief, this is usually the case in fiction as well. Even if a work contains magic users, their abilities are usually game-breaking enough that they are considered an elite class, that only a chosen few are lucky enough to achieve. Well, this trope will have none of that. In these works, every character (or nearly every character) can harness mystical forces. Perhaps the work takes place in a Wizarding School, or focuses solely on a Magical Society. Or maybe everyone in the world has magical powers. In any case, magic is commonplace, and not being a wizard sets a character apart from the normals. Sub-trope to Everyone Is a Super, dealing exclusively with powers considered to be magical.
ExamplesAnime and Manga