This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Speak with King Varian Wrynn in Stormwind Keep.
You have successfully defended Stormwind from the threat posed by this Twilight's Hammer cult, <name>, and without harming our own citizens. Our enemy will not rest for long. Indeed, Cho'Gall must already be busy planning his next move.
You must take word to King Varian Wrynn. Go directly to him in the throne room of Stormwind Keep. Tell the king that our enemies have shown themselves and we must be prepared for their return.
<The king's face takes on a look of concern, and then anger as you describe the Twilight's Hammer plot to destroy Stormwind.>
How dare they strike Stormwind? How dare they try to manipulate the people of this city against us and the Alliance! If not for your valor this day, <name>, our city would not have discovered this Twilight's Hammer scheme. You are a true hero of Stormwind and the Alliance.