Thorgest told you that you may be able to learn of Glorwen's fate by confronting their pack-leader, Blackfang.
'I know this is asking much of you, but if Thorgest believes that the only way we might learn something from the Wargs of Starkhath is to challenge their leader, then I can see no other way forwards.
'Glorwen's life may hang in the balance -- if she yet lives at all. For her sake as well as yours, take care and arm yourself well.'
The totem of challenge is in the centre of the ruins of Starkhath.
Nogmeldir has asked you to find the totem and call out the Warg-leader Blackfang.
Return to Nogmeldir at Vindurhal and tell him of Glorwen's capture by the goblins of Goblin-town.