Redemption

Sam, in a last ditch effort to save his brother and the world, steals Lucifer's power and throws himself into the past. Just one problem though...heaven felt it and now he has to worry about both sides trying to stop him! Can Sam rewrite his fate as Lucifer's vessel before the devil breaks free again, or will the world fall twice? Destiel (with Puppy Cas!) and Sabriel later on