Using sneak I hailed him and got him to talk, but it didn't really lead anywhere.
[Mon Jun 04 08:22:32 2007] You say, 'Hail, Retharg'
[Mon Jun 04 08:22:32 2007] Retharg says ''You must leave this place. As you can see, elementals have invaded our lair! Damn that [Farsoth]!''
[Mon Jun 04 08:22:36 2007] You say, 'Who is Farsoth?'
[Mon Jun 04 08:22:36 2007] Retharg says ''Farsoth is the son of the Ishva Mal. He sought to be leader and opened a portal to the elemental planes. He made a grave mistake however and the elementals that poured through the portal were not to be under his control. We are all doomed now! Grrrr.''
Couldn't get him to respond to anything else. I think he's most likely just a flavor NPC, but as you'd need to raise Gnoll faction (probably by killing the Paladins in Qeynos and other Qeynosian NPCs) it's a bit odd that he'd not be quest related. Stranger things have happened, though.
Edited, Jun 4th 2007 8:31am by CheesySnax