In Greek mythology, the backstory of the curse placed on Medusa stems from her being a priestess of Athena. After an encounter with Poseidon in Athena's temple, she was transformed into a Gorgon as punishment by Athena. This curse resulted in Medusa having a head full of snakes and the terrifying ability to turn anyone who looked at her into stone. This transformation emphasizes themes of divine vengeance and the tragic consequences of human desires, presenting Medusa as both a victim and a monster in the mythological narrative.