Trader Unoren explains that the undead creatures in the Underground Fortress are soldiers resurrected by a curse. He wants to quiet the vengeful spirits and free the souls of his comrades. He asks that you bring him bone fragments of undead monsters and skulls of Elves. Hunt dungeon skeleton soldiers, dungeon skeleton archers, dread soldiers, dark terrors and mist terrors.

You've collected all the skulls and bone pieces needed to break the curse. Return to the Elven Village and give them to Trader Unoren.