Assuming I remember correctly. If you are standing on the beginning of the Molten Bridge
leading directly to the Molten Core instance, the Black Forge
is a short walk down a metal path to the left. The easiest way there is the lava run, which can be quickly and easily done at 80. If you haven't done the quest Attunement to the Core
, now would be a perfect time.
I don't remember there being any trick other than getting there and walking far enough down the metal path to the forge. I just stood in front of it when I made my Smoking Heart of the Mountain. If someone else remembers any trick to it, please chime in.
edit: I'm assuming you know it's outside the entrance to Molten Core, not along the metal grate outside BRD. Also, when Cataclysm hits, it all may change or be unreachable (any beta testers know if the black forge is gone?). Edited, Oct 6th 2010 6:44am by dadanox