Deliver Darsok's letter to Jin'Zil within his cave in Malaka'Jin, in Stonetalon.
You've done so well for me, [player]. You're a regular lucky rabbit's foot and there's something I want you to see.
The harpies are not from around the Barrens. They come from a place called Stonetalon, far to the northwest of here. Though it is probably a dangerous place for you, I need this letter delivered to an old friend of mine who lives there, a witch doctor by the name of Jin'Zil.
He'll be happy to know that Serena Bloodfeather is dead, and I think you'll find Stonetalon an interesting place.