[Belegorn]

In the First Age Melkor had Elves working for him in his dungeons. Anyone remember the metal creatures sent against Gondolin by Gothmog to break its unassailable walls? I think this is not in the Silmarillion, but in the unpublished version, The Fall of Gondolin. I think maybe those Elves had a hand in creating these creatures. Melkor of course was a rival to Aule in their smithying craft so maybe it was mostly all of him. But I would think the skills of the Elves were put to use in the creation of these metallic mammoths.