Lok'lira the Crone inside the Forlorn Mine wants you to retrieve the Runes of the Yrkvinn from Overseer Syra.
Yes, it must be the green-skinned prisoner you're after... We might be able to help each other.
You're not going to get the goblin out of here by force. Not alive, anyway.
Among my people I am known as a Yrkvinn, a practitioner of illusions. As you can see, the Hyldnir have made me their prisoner.
If I had my runes, I could make you go unnoticed among them. Further inside, patrolling the mines, you'll find an overseer named Syra. She has my runes. Retrieve them and we'll talk some more.