Some time ago, a group of Gondar explorers dug out an ancient dwarven complex
in the hills east of the Earthfast mountains, in Impiltur. Inside the
complex, an old forge was found. The contraption was brought back to the
House of Skilled Hands, the temple of Gond in Tantras, and the Gondsmen
studied and experimented with it for some time.
Their reserach indicated the forge to be a precision forge, used to craft
small pieces (gears, wire, needles, ...) and not larger pieces like armour or
weapons. The working of the forge is quite complex though, and requires
charcoal to heat up.
In time, the Waterdhavian Gondars were able to create a copy of the forge
(the original remaining in Tantras), and Gondar stone carvers crafted various
moulds to be used with it.
Operation of the forge is best learned about from another already familiar
with its workings, though the most dedicated might hope to puzzle out its
operation on their own, given enough time and resources.