And to be a Dwarf meant repaying what is owed. Grudges, of course, were repaid in blood and death, but the other side was that those that helped the Karaz Ankor were repaid in ways commensurate with their act. When Sigmar had saved the High King, he had not only been gifted the ancient treasure Ghal-Maraz, but on top of that the best Runesmith of the age was commissioned to create something entirely new to settle the debt. Similarly, when manlings aided the greatest reconquest in millennia, the burden was on him to repay it. And they did so with swords, so swords it had to be.