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Mordred is a character from Arthurian legend. In some of the legends, he betrayed King Arthur and killed him. He is said to be Arthur's son by his half-sister Morgan le Fay (also called Morgana or Morgaine). Mordred was born at Caerlon. Mordred was also said to have been killed by Arthur after he stole Excalibur from him. He was killed while Arthur was fatally wounded. His name comes from old Welsh. He was not a knight of the round table. In some legends he is a chimera made by Morgana with Arthur's blood and a range of magics, Mordred in multiple legends was known to be the thief of king Arthur's second sword Clarent, which was known as Arthur's Sword of Peace. This being the reason why it is not as well known as Excalibur, which was Arthur's Sword of War that was used to protect of Camelot. Clarent was a sword that would be present whenever Arthur would make a covenant of peace. The exception to the usually peaceful status of Clarent being the legend in which Morderd stole it and later used it to mortally wound Arthur just before being cut down in turn by Arthur.