Vol'jin's New Quest
The horde has new exploits in 5.1 related to Vol'jin, A Dagger in the Dark. Here are some screenshots. Vol'jin is ordered by the Horde to investigate the origins of the Saurok. He is not happy to discover that the Mogu created them from dark magic, but Garrosh's loyal guards are excited by this discovery--they want to create an army of corrupt, Mogu-like warriors.