The conversation between human and AI assistant.
Is Arya Stark's sword, Needle, made of Valyrian steel?
That's fascinating. Is there anything else you can tell me about Valyrian steel?
Valyrian steel is incredibly rare and valuable. Many people believe that it will be crucial in the battle against the White Walkers, as it is one of the only materials that can effectively kill them. Additionally, many noble houses in Westeros consider it a great honor to possess a Valyrian steel sword, and they are often passed down through generations as family heirlooms.