Very clever the Dravanians were in their most recent attack, for they took special care to disable the dragonkillers first, knowing the ballistas could turn the tides rapidly. While many of our beloved devices have survived the brunt of the flames, the sensitive internal gears have been weakened with use, and the pikes cannot swivel as seamlessly as they used to. The ballistas' bearings must needs be replaced, and I would task you with crafting the mythrite nuggets with which to create them.