All over history, various ponies have had mysterious powers. Some refer to them as devils; others, gods. Mostly they just call them gifted by the gods, or simply Gifted. I had to find out about this stuff in a project, and I think this project might still be going on, though never from an actual teacher except fate. Fate is such a cruel mistress, isn't she?
Oooh
Stories with OCs always seem to be able to go places that Mane 6 or background ponies would find more difficult.
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Simply because they don't have character constraints. (Unless it's someone else's OC)