Overlord Overload  

This is a very straightforward hunt and kill quest. You can find Overlord Gazraxx walking along the road that leads east out of the Western Pens of Riliss. Be aware that the landing zone is very near to Riliss faction Iksar, so if you're KOS you'll need to be careful flying in. Also, there's a multitude of hostile creatures along the road, so again, you'll have to take care to find the Overlord without finding a lot of other trouble.

Killing him will cost you only 50 Riliss faction (and some meaningless Sathirian faction) so this is a good quest to quickly raise your faction with Bathezid's Watch.