Heroes and Hunters

This is a doozy with a few timeline jumps. Sylar happens across the boys post-Heroes, and after making himself an angel and claiming Metatron's mind, he leaves to find a way of freeing Lucifer and Michael. Castiel changes the history of the Heroes timeline, tho unable to prevent Sylar from becoming who he is, gets the aid of Peter Petrelli and Gabriel (Sylar with mommy issues)