Why does Medusa have to be killed?

The Gorgon sisters were Sthenno, Euryale, and Medusa; Medusa was mortal while her sisters were immortal. Beyond the Gorgon's birth, there is little mention of the Gorgons as a group, but Medusa has several myths about her life and death. The most famous of these myths concern her death and demise. read more

In a late version of the Medusa myth, related by the Roman poet Ovid (Metamorphoses 4.770), Medusa was originally a ravishingly beautiful maiden, "the jealous aspiration of many suitors," but because Poseidon had raped her in Athena's temple, the enraged Athena transformed Medusa's beautiful hair to serpents and made her face so terrible to behold that the mere sight of it would turn onlookers to stone. read more

The Gorgon sisters were Sthenno, Euryale, and Medusa; Medusa was mortal while her sisters were immortal. Beyond the Gorgon's birth, there is little mention of the Gorgons as a group, but Medusa has several myths about her life and death. read more

So he sent Perseus on a quest to kill Medusa because he thought that she couldn’t be killed. He literally wanted Perseus dead just to have his mother to himself. Little did he know, Athena and Hermes aided Perseus on his quest to kill Medusa. read more