Yeah, spoilers ahoy, short one though
An unknown Pegasus is seen with a lightning shaped trail, despite going in a straight line.
Now aside from that, theoretically, a natural affinity with clouds and other whether activity counts as “Elemental” magic in a sense. Specifically Air elemental. Which often subdivides into electricity. It’s hard to conceptuallise Akins of magic that does the same effect in a primal state without the idea that air magic is in their blood.
As for control, I’m kinda trying to define it as whether they can control the form it takes. For example, a unicorn that gains their powers from the stars could change that star energy into any number of forms, such as fire, water, earth… Etc.
Meanwhile, a Pegasus, which as a race are attuned to the sky, will only be able to wield the same air based magic that lets them move clouds. However, through focus, rather than trying to change their lightning energy to something else, they simply focus it into a beam. Or ball.
Now I don’t want to say I’m right… That would be presumptuous if canon. I just want it to sound plausible.
I mean, in other shows, human Ninjas, who have barely any magic in their blood can still use incredibly basic supernatural tricks. As can Monks blast a hole in a mountain through purely moving energy around their own body.
But we’re supposed to assume that in this show, a Pegasus can’t do the same despite a magical heritage that is much, much stronger?
Personally, it doesn’t jel with me to say its impossible, However, I do admit that it would probably require much…much more effort to master than a unicorn would take to do a similar effect.
It’s never going to show up in the show as far as I know, but this is the kind of theory that I think is quite workable in a fan-fiction without having to add an AU tag.
Edit: As for the whole Headcanon and Fanon thing… I thought that was obvious. Everything I said is either based off of my conceptualisation of magic needing to be a kind of energy (Specifically several kinds of energy like Air, Earth, Fire, Water, Light, Dark, Arcane, Divine.), or my specific interpretation of canon statements. So essentially, I’m saying all this because my show’s head-canon allows it.
… What I’m really trying to ask… Is why doesn’t anyone else have the same head-canon? Or at least thought of the idea.
The closest I’ve come, is one person’s theory that hooves, being made of keratin like horns are, could theoretically make conductors of magic like Horns can.