The Hunt For Red Ore is accepted from Dreavan. You must collect some Red Ore.

Then return to Dreavan, for a default reward of 1500 exp, 320 gold, and one choice from either 375 exp or 320 gold.

Afterwords he can do enchantments for you. See the Enchant List for a list of enchants and ingredients.

Red Ore can be found in other places, so it's possible to fulfill the mission without having to visit the cave.