Deliver the letter to King Varian Wrynn of the Alliance at Stormwind Keep in Stormwind City.
You are now, and forever will be, a Knight of the Ebon Blade, [player], but know this: you were once a hero of the Alliance.
<Darion stares at you.>
This order must establish allies for itself if it is to survive. You must represent the Knights of the Ebon Blade to the Alliance.
On the platform, southeast of me, is a portal to Stormwind City. Take this letter, given to me on your behalf by Lord Fordring, and deliver it to King Varian Wrynn. Use the portal.