Violet Netherwing Drake

After promising to fly you to the ends of Outland, the netherwing drake was eventually drawn to the blue skies of Azeroth as well.

Riding Requirements:

This mount is available to all eligible characters on your account.
Level 10
Apprentice Riding (ground)
Expert Riding (flying)

Source:

Voranaku in Lower City, Shattrath City. Requires Exalted with Netherwing.
Drake Dealer Hurlunk in Netherwing Ledge, Shadowmoon Valley. Requires Exalted with Netherwing.
Cost: 160 (200 base) (reputation discounts apply for some factions)

Notes:

Once you have reached Exalted with the Netherwing faction, you can complete a quest with one -- and only one! -- of the drakes assembled in the Lower City of Shattrath in order to receive a free Netherwing Drake mount. You may also buy any of the drakes from Drake Dealer Hurlunk at Netherwing Ledge, although again you must be Exalted with the Netherwing faction first.