Mor'rud Recalls 2 (Ch.325)

"But you did." Neveah said, chuckling quietly at Mor'rud's dramatic look.

"I did...yet at the time, I knew not that I would." Mor'rud replied.

"The mines were well built, not into the depths like the hidden city itself was but still underground. There was only one out let to the surface and it was built for dwarven kind alone, surely could not fit a beast so great." 

"The flames scorched down on the mines, sending a heat wave spreading through it but they did not yet burn through and the certainty that he could not reach us emboldened my battalion." Mor'rud said.

"Menarx's first flame must have just been a ruse...to give a false illusion that the mine would stand." Neveah guessed.

"Yer know it as it is... the flames of the Northern dragons burn through anything and the Lord of Ruby scales hails from the purest bloodline of northern dragons."