Excalibur (1981) on Netflix

As the title would suggest, it follows the travels of the legendary sword Excalibur through Arthurian myth, from the violent, powerful hands of Uther Pendragon, to a long-years' rest in the stone to being redrawn by Uther's son Arthur, who uses it to defeat the evil invaders and establish the great court of Camelot and the great Knights of the Round Table. It is there in Arthur's glory years and in his decline, brought on by the love affair between his wife Guenevere and best friend and best knight Sir Lancelot, the Holy Grail Quest which produces many casualties among the knights, and the arrival of Mordred, the son Arthur had by his evil half-sister, the sorceress Morgana. Through it all, the magician Merlin watches over everything, always ready to throw in a Charm of Making when it's called for.