• Swift Warstrider
• Item Level 40Disenchants into:
  Not disenchantable
• Binds when picked up
• Races: Orc, Undead, Tauren, Troll, Blood Elf
• Requires Level 40
• Requires Riding (150)
• Use: Teaches you how to summon this mount. This is a very fast mount.
• Vendor 2000  

Source

Swift Warstrider a PvP reward, and can be purchased for 2000   from Raider Bork <Mount Quartermaster> in Hall of Legends.

Patches and hotfixes

• / Patch 4.0.1 (12-Oct-2010): Cost changed from 50,000 to 2000  . 
  
• Patch 3.3.3 (2010-03-23): Cost changed from 30 30 30 to 50,000  
  
• Patch 2.4.0 (25-Mar-2008): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB