Before the time of the two sister's rule there was a power that was a match for them both. In the year of Starswirl the Bearded there was a dark power that threatened to conquer all of Equestria. The evil Nocturnal Tempest. Ruler of wind and thunderclouds. His name brought fear to all those around. The ponies who had not fled in fear were forced to his rule. He feared no pony and fought like a pony gone mad. Tales of his intense actions brought the few ponies who could stop his surge to power.
Starswirl the Bearded and all the other magical ponies that had power beyond the garden variety unicorns banded together. It was an epic fight till using magic that not even the evil one knew of... a spell was cast and he was ripped from Equestria and sealed away in a pocket world that he would not escape....or so they had thought.
Of course this is THEIR version of what truly transpired. They were not aware of what happened within the kingdom of Nocturnal Tempest. And a mass memory loss spell was cast in hopes to forget the only male Alicorn in the history of Equestria.
Able to use his magic over the wind to increase his speed. He had been known as the fastest flyer in all of Equestria and beyond. This was due to his use of wind magic.