The Sith that became a Jedi

A what if story of instead of ezra being some what helpless and on the street to being a trained sith assasin and what will happen when he see's Sabine in a pool of her own blood? and what will happen when Ezra finnally tells the crew about his life, what in store for him and Sabine? What happens when an evil stirs that is even more sinister and powerful then the Sith Lords?