Board Thread:What If?/@comment-5674726-20140630220202/@comment-5102537-20140824083655

I think another hint for Nimueh's deliberate choice was the fact that it never happened again ever after her death. Several people were saved from certain death with magic but no life in exchange was demanded. Maybe that was the reason why they either made Nimueh being the one responsible from the beginning or changed it all in "Le Morte d'Arthur" later in order to let Merlin and others heal people without killing someone each time magic is practised for healing purposes.

On the other hand, when Uther was saved from Erdward's bugs the life for a life-policy was nowhere to be seen either.