seer
These powerful wielders of the most fundamental magic have the ability to locate the entrance of the Underworld. Ask them about underworld and they will answer your plea. They are also the main collectors of the stones that can be taken from the Underworld but the reason remains obscure. If you want to give stones to the seer, you may do so by using "turn <amount of stones>". Finally to know how much you have contributed just ask them about stones.
See Also: stones, dungeons, underworld