Anvils of Vaul

Not to be confused with Vaul's Anvil (temple).

The legends of Ulthuan tell that when the Daemons first broke into the world, the smith-god Vaul descended from the heavens. It is said that he travelled to every corner of the globe, raising stone anvils from the living rock upon which he crafted blades of great potency, which the Elves used to defend their realms. Though the weapons and their wielders have long since gone, many of the anvils remain. Mere proximity to an Anvil of Vaul bestows a warrior's weapons with incredible enchantment.

Source
pg. 118
 * Warhammer Fantasy Battles (8th Edition)