Naga Brazier
From WoWWiki
The Naga Brazier can be found in Ashenvale. [10, 28]
Objective of
Putting the flame out will start waves of naga bent on killing you and Muglash. Once all naga are dead 
Vorsha the Lasher will appear, which must be killed for the quest 
[23G-2] Vorsha the Lasher.
