Yeah its in races of stone
It provides sustenance for the smith using it, he doesn't need to eat, drink, sleep or even breath while using the forge. be cause he needs no breaks he crafts three times as fast.
If you are interested in setting up a crafting area.. and supporting it with a Dwarven theme, and perhaps even a tricksy "trap", here is a suggestion.
Go ahead and buy that magic Forge, set up in an area conveniently close to, in fact part of, Moradin's temple. Go right ahead and take that "Must be Good to use the Forge" alignment restriction, cutting costs by 30%. Hey, why not also take "Must be a Dwarf to use the Forge" for another 30%?
Put a few items in the Temple.. the Fluid Cooling Trousers of the Armorsmith (+20 alchemical bonus to Craft: Armorsmithing) with the Good alignment restriction (-30% costs) that will just ooze right off anyone who isn't a Dwarf (-30% more), the Distilled Insight of the Master Weaponsmith (worn as a tabard, +20 alchemical bonus to Craft: Weaponsmith, requires Good alignment, won't work for non-Dwarf).. [Hint: Don't think about long strolls away from the Temple area with these items. People are watching.]
Oh, but your character may not be a Dwarf. Or Good. Hmm. There does happen to be this conveniently close holy spring, flowing into a basin, then a cistern, which Dwarves revere and sometimes sip from (with a very, very silver dipper), that they will even let well-behaved non-Dwarves pray and sip from. Ask for Moradin's help, they say, and he can help you achieve your inner greatness.
Sure enough, if you are persistent, Moradin may smile upon you, and transform you into a Good Dwarf.
Once.
He doesn't listen all that well to "But I only wanted to be a Dwarf long enough to use the Forge real good!", so enjoy your new race. And alignment, if you weren't Good before. He might even make you Lawful, if you had been making advances towards His Dwarven maidens.
Dwarven Paladins would be very joyful to have access to this area, with the Forge, the Temple, and the Holy Spring conveniently near each other.
Players who like to skip all the "talky-talky", and get to the forging, might feel this is a trap. This is one of those very good reasons to pay attention to details.
