Salanar the Horseman asks that you steal a horse from the Havenshire Stables and return it to him at Death's Breach.
Horse Successfully Stolen
How fortuitous it is that the Crusade has a stable full of horses a mere stone's throw from this post. Though they guard it tenaciously, an enterprising young death knight could break through their defenses and take what is rightfully <his/hers>!
Once you acquire a horse from the Havenshire Stables, return it to me and I will see what can be done about transforming it into a proper deathcharger.
Remember, <name>, it's only stealing if you're caught. Watch out for that deranged stable master, Kitrik!