Together in the Skies

This achievement is completed by learing Windborne Velocidrake, which is taught by [item=194549], the reward of Shady Sanctuary.
Shady Sanctuary is 6th quest in [storyline=1306], the third chapter of the main story line of [zone=13982].
You can start working towards the mount after completing the main story in The Waking Shores.
Required quests in [zone=13982] (32):

Spoiler

1. 
   
2. 
   [storyline=1303]
   
   1. 
      
   2. Next Steppes
   3. 
      
   4. Into the Plains
   5. 
      
   6. Proving Oneself
   7. 
      
   8. Welcome at Our Fire
   9. 
      
   10. The Shikaar
   11. 
       
   12. Making Introductions
   13. 
       
   14. Supplies for the Journey
   15. 
       
   16. Toward the City
   17. 
       
   18. For Food and Rivalry
   19. 
       
   20. Mysterious Beast
   21. 
       
   22. By Broken Road
   23. 
       
   24. Connection to Ohn'ahra
   25. 
       
   26. Omens on the Wind
   27. 
       
   28. Maruukai
   29. 
       
   
   
3. 
   
4. 
   [storyline=1304]
   
   1. 
      
   2. Clan Teerai
   3. 
      
   4. Clan Ohn'ir
   5. 
      
   6. Clan Nokhud
   7. 
      
   8. Honoring Our Ancestors
   9. 
      
   10. Omens and Incense
   11. 
       
   12. Unwelcome Outsider
   13. 
       
   14. The Emissary's Arrival
   15. 
       
   16. Clans of the Plains
   17. 
       
   18. The Khanam Matra
   19. 
       
   20. Trucebreakers
   21. 
       
   22. Covering Their Tails
   23. 
       
   24. The Nokhud Threat
   25. 
       
   
   
5. 
   
6. 
   [storyline=1306]
   
   1. 
      
   2. Chasing the Wind
   3. 
      
   4. Nokhud Can Come of This
   5. 
      
   6. Blowing of the Horn
   7. 
      
   8. Green Dragon Down
   9. 
      
   10. With the Wind at Our Backs
   11. 
       
   12. Shady Sanctuary
   13. 
       
7. 
   

Reward from Ohn'ahran Plains main storyline Ohn'a'Roll

The drake ends up in your bags, it's not automatically learned. So if you think you're missing it, check your bags!