Ondor spoke of a goblin-captain which they refer to as the Captain of Fangs...perhaps a Warg-rider or commander of the Warg-forces in Nan Curunír.
'I finally found the goblin in command. He is up in that stockade to the north. It's a bit tricky to get in there without being spotted by the guards though...your best chance may be to sneak in through the caves behind the stockade.
'The goblin calls himself the Captain of Fangs, or some such. If you can defeat him, it will be a while before anyone leads a raiding party out of the Vale.'
The Captain of Fangs is in the stockade, north of Ondor. It can best be reached through the caves behind the stockade.
Ondor has asked you to defeat the Captain of Fangs, a goblin Warg-rider of fierce renown and the leader of these goblins.
Ondor is encamped south of the stockade.
You should return to Ondor and tell him that the Captain of Fangs is no more.