I've just entered the Fjords and got the quest "Red Ore Alert" from Crabbe. Going down the path, I've killed many goblins, but past the "Grand Knights Shrine" and going deeper along the path, I've run into what is labeled as a "Black Goblin Warrior".

I can't make a dint in him. Used my sword and bow and not any indication of getting any hits on him so can't carry on to the mines.

Why or what do I need to do in order to be able to fight these goblins? I'm level 18.

Thanks