To obtain this mount, you first need to obtain the achievement ‘ Ardenweald’s a Stage’ which requires you to participate in all 7 performances at the Star Lake Amphitheater in Ardenweald.
The daily performances are random and only one rare can spawn per day, which means you need to participate in performances in 7 different days.
You can check which performance is up in the Today in WoW highlight on Wowheads page
None the Wiser Guild 