Her intention of writing this passage is that no matter what, or what charachters were involved with King Arthur, theres always one constant: Merlin, and how, without him, Kind Arthur wouldve died. She achieved her point by pointing out a few charachter vital to the story, and then lastly named Merlin, and how important his role was. I hope this helped, feel free to mark as Brainliest, and good luck! :P