There is a task you must perform. Go to the moonwell north of Aldrassil and return me a phial of its water.
The moonwells hold the waters of the Well of Eternity, the ancient source of magic that has wrought so many horrors upon our world.
The druids take advantage of its properties, and the Sentinels revere the wells as shrines to Elune, but sorcery is forbidden to all.
So you have heard the first part of the aftermath of the Battle of Mount Hyjal. There is much more to be told and the task you have begun here will continue through the rest of your journey through Teldrassil and into Darnassus.