Azzere the Skyblade is a level 30 rare wind serpent that can be found just south of the Ruins of Tuarajo in the Southern Barrens. (I have indicated where he can be found in red on the map below.) He drops the typical green item and decent experience for levelers. He shares the same model as many other wind serpents throughout the world, but he is the only one in this particular color scheme that is tamable at level 30. The other tamable wind serpents of the same color can be found in Swamp of Sorrows and are level 51-53 and the elite Spawn of Hakkar in Sunken Temple.
Azzere the Skyblade can be found with NPCScan. You will need to add it, his NPCScan ID is 5834.
He is also pretty easy to find when hes up because he is the only wind serpent in the area and he is very vibrant compared to his surroundings.
Before the Cataclysm his spawn timer was around 4-6 hours. I'm not sure if it is the same now, or less. I did however, find him on my first pass through the area.