Quest:The Battle For The Undercity (Alliance)

Objectives
Assist and  in bringing  to justice! Report to King Varian Wrynn should you succeed.
 * Assist King Varian Wrynn

Description
Deep inside the bowels of the Undercity hides the assassin responsible for the deaths of and our brave soldiers at the Wrathgate.

Varian has brought the full might of the Alliance with him to assist in the take down. Join him and Lady Proudmoore in the manhunt and earn your place among the greatest champions of the Alliance!

Speak to King Varian Wrynn when you are ready.

Completion
For too long have the Horde been left unchecked. We allowed their territories to prosper and in return for our generosity they plotted and planned our demise.

Peace? Useless... it's gotten us nowhere. We have lost some of our greatest heroes to "peace." Let us see what battle brings.

Return to Northrend,. Conquer it for your king - FOR THE ALLIANCE!

Other
It seems that even if you hearth/port/etc during the 5 minute countdown, Varian still starts without you. You could leave him to it and do other things then come back. But it may be better to just do it with him, as it is faster and more safe in terms of completing the quest, not getting lost when you try to find him, etc. And of course, the quest is among the most epic in WoW.


 * Upon entering the fight between Varian, Thrall and Sylvanas. Sylvanas may say her Aggro dialouge but Thrall and Varian will never.