* A quality of a story: A story could be considered magnificent due to its epic scope, breathtaking prose, profound themes, or impactful characters. In this case, it's not a genre, but a way to describe the story's merits.
* A theme: "Magnificence" could be a theme explored within a story. For example, a story about a character striving for personal greatness could be considered a story about magnificence.
* A title: Someone might be writing a story called "Story Magnificence". We'd need to know the content of the story to determine its genre.
To determine the genre of "story magnificence," please provide more information about the specific story or context you have in mind.