Class Exclusive Mounts Now Available to Grab in World of Warcraft
"To claim your mount, first complete the achievement ‘Breaching the Tomb’ on the Broken Shore, then head back to your Order Hall. You’ll be rewarded, as befits a hero like yourself, with a mount that confirms your status as a paragon of your class." Bellow you will find all 12 class mounts.
Source: official site