Armored Bloodwing

The Armored Bloodwing is a monstrous, flesh-eating bat mount and the perfect companion for trips that call for death and destruction. Soar into battle atop the undisputed ruler of the night skies.

Unlike the mounts from the World of Warcraft Trading Card Game, this mount is directly purchasable from Blizzard. Released on May 30, 2013, it is the fifth mount to be offered in this way.

Source
This item is available for purchase from the shop or the In-Game Store for $25 or €25. It was released on May 30, 2013.

With the See You Later Bundle on December 20, 2019, this mount was available at a discounted price with other items. On January 19, 2019, the mount is no longer available for purchase as it entered hibernation in the Blizzard Archive.

Mount Journal
This monstrous, flesh-eating bat is the undisputed ruler of the night skies.

Monstrous ruler of the night skies, this flying mount is prepared for serious mayhem.
 * In-Game Store

The giant, scary, flying bat you always wanted - ''Soar into battle atop the undisputed ruler of the night skies – the Armored Bloodwing mount. This monstrous, flesh-eating bat is the perfect companion for trips that call for death and destruction.''
 * Blizzard Shop

Mail
Players are mailed this mount by Mei Francis: