Speak to Selenn at the Ruins of Ameth'Aran.
Description
Nothing will repair the land quicker than the strength of those who inhabit it. We night elves are fortunate that some of our best allies just happen to be both the land and its inhabitants at once.
The Ancient of War known as Selenn was charged with guarding the ruins of Ameth'Aran, to the south. Go there and seek his help.
Reward
Also, you get:
70
Completion
If the great Malfurion requires my presence, it is my duty to heed his call. It is also my duty to protect these ruins, however.
Perhaps you'll help me fulfill both my obligations, <name>?
Gains
Upon completion of this quest you will gain:
Additional Information
