This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Speak with Lord Grayson Shadowbreaker in Stormwind's Cathedral District.
The time has come, <name>, for you to learn about what it will take for you to acquire something you have no doubt waited on for some time... your charger.
Speak with Lord Grayson Shadowbreaker in Stormwind's Cathedral District. It is he who will guide you not only though the legerdemain of a Paladin's most trusted mount, but the tasks before you to acquire one of your own.
I wish you the best in this trial. For the Light, noble <brother/sister>!