A gwyhyr is a splendid gnomish sword, regarded as the best in the world. The gnomes had ceased production of these weapons more than two hundred years before the events of the saga. Gwyhyrs were forged with "dark iron" which made the blades light and sharp as a razor. They were also characterized by their undulating edge and hide covered hilts. Leo Bonhart wanted a sword for Ciri, and he had chosen a gwyhyr from the collection of a particularly dedicated swordsmith, Esterhazy. She named it "Jaskółka" (English: Swallow; Old Tongue: Zirael).