He thought himself ready to be a god, the hubris of mortals tend to lead to only one path in such a case, death.
For the rest of history Star Swirl the bearded faded without any trace of what happened, but for Celestia the truth was far more painful.
That was a good story.
This was certainly an interesting idea!
*Minor note: the title is missing a possessive apostrophe. E.g. it should be: "Star Swirl's Babel"
*Minor note2: in the description "Bearded" should be capitalized as it is part of his title/name.