The last boss of Undead Strath has a very small chance to drop a mount called Deathcharger's Reins (http://www.wowhead.com/?item=13335). Now with the level cap being 70, you can solo him over and over at 70 to get the mount. Not sure what classes can do this but I would think Druids, Shamans, Hunters, and Paladins could. Not sure about the other classes.
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