A long lost race of ponies has been exterminated on the night of nightmare moon's banishment. Or so all the unicorns thought. They had announced that there are no more of the race to the pegasi and earthponies. Yet the alicorns that lived on knew better. However they kept quiet for a thousand years. Their attempt to keep the information about the race a secret was revealed when the lone pony of the race walked into Ponyville.
The lone pony is a teal colour with a yellow mane. His race of ponies don't get cutie marks.
I'm not lazy for not putting cutie marks. Noooooooit's actually part of the story.