Those who purchased the special promotion 12-month subscription to WoW Retail are now getting the mystery Dragonriding mount, the Auspicious Arborwyrm, added to their collection. It currently cannot be customized at the Rostrum of Transformation. This mount is the expected Lunar New Year reward for the Year of the Dragon.
Originally Posted by Blizzard
(Blue Tracker / Official Forums)
Lunar New Year Offerings
Sprout to life astride the steadfast Auspicious Arborwyrm mount* with dynamic flight and soar the skies of Azeroth in speed and style by purchasing this mount from in-game or the Blizzard Shop. Or, get it at no additional charge when you sign up for a 6 or 12 Month Subscription; you’ll receive the newest Lunar New Year offer—the Auspicious Arborwyrm mount—in the World of Warcraft along with the twiglike Cypress pet** for your Wrath of the Lich King Classic characters.
Players who purchased the 12-Month subscription will automatically receive the Auspicious Arborwyrm and the Cypress pet. Players on an existing 6-Month recurring subscription with a future renewal date will receive these items at no additional charge, no later than January 23, 2024 (must be redeemed by July 31, 2024)
Soar the skies of Azeroth in style with dynamic flight! Sprouting to life only once every sixty years, this living wooden mount combines the patience of a tree and the grace of a dragon.