How does King Arthur die?
Well, I know of two widely told versions of the death of legendary King Arthur. One theory is that Lancelot — once Arthur’s most trusted knight — and Queen Guinevere betrayed Arthur, which prompted Arthur to go to war against Lancelot. Before going away for battle, Arthur left Mordred (his nephew) temporarily in charge of Camelot. But power-thirsty Mordred soon wanted the kingdom for himself, which resulted in a swordfight between Mordred and Arthur that ended in the deaths of both of them.