Ever since Deathwings Cataclysm there were many villains that were reborn. His son Nefarian being one of them also returned descending further in to Blackrock and putting forth a whole new set of challenges. There is only one force that can stop him and that is the Avengers of Azeroth. *Watch Classic Reborn: Blackwing Lair to get the background story* Nefarian's doom begins now!