but even the 'things of iron ' that 'opened about their middles ' to disgorge bands of orcs are called 'ruthless beasts ' , and gothmog 'bade ' them 'pile themselves ' ( p. 176 ) ; those made of bronze or copper 'were given hearts and spirits of blazing fire ' ; while the 'fire-drake ' that tuor hewed screamed and lashed with its tail ( p. 181 ) .