Sword of Kings (PF2)

From the introduction: It has many names, from many languages. Argentyne. Caelfydch. Dakana. Haelgard. The Sword of Kyuth. Siegebreaker. Regardless of the exact name used, most sages agree on its description. It is the Sword of Kings. A runic blade that contains within it the rune of rulership, smelted down through means beyond mortal ken, alloyed with silver and iron both, and turned into a symbol of royalty as much as a weapon for defeating foes.