The House of the Hammer of Wrath: its Lord was Rog. Smiths and craftsmen were for the most part in this House. In battle they carried great war hammers and heavy shields, their symbol was the stricken anvil and a hammer that smites sparks about it; it was also carved in their shields, and they wore armour in black and red. They had a great hatred for Morgoth and the Balrogs, and during the Fall of Gondolin slayed a great number of the fell beasts. though perishing themselves.
It was at that time that a balrog and a contingent of orcs ambushed their company. Glorfindel there accomplished his greatest deed, for he saved the liv. Glorfindel and the balrog on the edge of the cliff