One time he was battling agains a knight he broke his sword and he was nearly killed. Soon enough Merlin came and rescued him.merlin took him to the lady of the lake and she gave him a sword named Excalibur.
The balls need to be over the victim's eyes, and the dick needs to be laying over the nose and the mouth (if you can reach that far.)
The name comes from the fact that this will look like the victim is wearing a medieval mask/helmet, like King Arthur wore.
The story of king arthur was invented by the english while they were busy kicking the crap out of the cultureless welsh.