Arthas Menethil, Crown Prince of Lordaeron and Knight of the Silver Hand, was the son of King Terenas Menethil II and heir to the throne. He was trained as a paladin.
Despite his promising beginnings, Arthas became one of the most powerful and evil beings Azeroth would ever know. Taking up the cursed runeblade Frostmourne, he became a death knight, led the Scourge in destroying Lordaeron, and became the Lich King.
Yet, no king rules forever. The legendary Lich King finally met his ends in the hands of the Argent Crusader and the Knights of the Ebon Blade.