Quest:The Gatekeeper

Objectives
Use the Horn of Cenarius to help you slay Azralon the Gatekeeper. Provided item: Horn of Cenarius (quest item)
 * slain

Description
According to these tomes, one of ' most powerful lieutenants serves as the sole gatekeeper to Sulfuron Spire.

You won't be able to defeat him alone.

Sound this horn when you engage in combat with Azralon and any of our forces in the vicinity will come to your aid.

You must hurry,. It won't be long before the Firelord realizes what we're up to.

Rewards
You will also receive:

Progress
You've returned, ?

Completion
It is done. Only the final step in your mission remains.