Other mistake: When Arthur and all his knights assemble on hilltop at night and Merlin tells them all not to forget where the Round Table started, you can see the crew's spotlights reflected on the back of some of the knights' armour.
Other mistake: At the siege of Leondegrance's castle, when they show the knights on top of the siege tower moving to the wall, one knight in particular puts a cigarette in his mouth through the breathing slit in his helmet before crossing onto the wall.
Answer: They were the Goddesses of Avalon. A group of women who each have a specific magical power. They were the makers of Excalibur, healed King Arthur's wounds from his first battle and took him to his final resting place, readying him for the day he would be needed again.
Most Arthurian myths attribute elves as making "Excalibur", and also "Clarent," King Arthur's other magical sword.
raywest ★