Even after the war, there was no peace for the Dwarfs as hold after hold fell to the greenskins or Rat-men. New chapters were added to the Book of Grudges ever year as the Dwarfs fell back to the surviving hold. They brought with them stone fragments of their lost realms, and reviving the older custom, inscribed them with runes descrining the injusticed done to them and laying curses upon their enemies. During the long siege of Karak Azgul, the Dwarfs used these stones as ammunition, literally hurling their grudges back at their enemies. Since then, it has become commonplace to carefully selcet and prepare the stones that are to be fired. With many skilled Engineers, they espoused their belief that the engine is only as good as they rock it throws.