Who is Red Dusk?

Red Dusk was a former "knight" of Nightmare Moon, actually a synthetic pony. His upbringing was an unholy combination of regular summoning magic and dark magic, to create a pony who would be stronger and sharper then the average soldier, and be the perfect weapon to attack Celestia with from the moon. His loyalty to the Princess of the Night was unparalleled, being the night's wrath, striking fear into the hearts of ponies. That is, for five hundred years, then his last year, his five hundred and first year was the end of his destructive reign, trapped in a shell of crystal until his uncovering shortly after Luna's release from the moon. Inside, he had thought over his life and by the time he was uncovered, 'bowed' to the will of both the Princess of the Day and the Princess of the Night. Thus begins his story.