The only way to kill Medusa is to slice her head off. Annabeth can't do it because Medusa would slice her into pieces. How does Percy kill Aunty Em/Medusa? He uses the gazing ball as a mirror to see Medusa's reflection and then slices off her head.
<h3><u>A person who has great responsibilities, such as a king, is constantly worried and therefore doesn't sleep soundly. This saying is a line from the play King Henry the Fourth, Part Two, by William Shakespeare.</u></h3>
