He uses the mirrored back of the Aegis to strike at Medusa without looking her in the eyes. He beheaded her, and then put the head in a sack.
Polydectes.
To slay Medusa.
Though she was not exactly a 'beast', Perseus was known for slaying a monster, the gorgon Medusa.
Perseus was sent to slay Medusa and bring back her head.
The god Hermes aided Perseus by providing him with a sword to slay Medusa and a reflective shield to avoid looking directly at her. Additionally, Athena helped Perseus by giving him a polished shield to help him safely approach Medusa.
Perseus faces external conflict with the gods, particularly with the character of King Polydectes. Polydectes sends Perseus on a perilous quest to slay Medusa in order to get rid of him within the story of Greek mythology.
because perseus killed medusa
Perseus needs the Grey Woman, also known as the Graeae, to provide him with information about the location of the Gorgon Medusa. The Grey Woman possess knowledge of where to find the nymphs who guard the items Perseus requires: a reflective shield, winged sandals, and a cap of invisibility. By obtaining this information, Perseus can successfully prepare for his quest to slay Medusa.
He must outsmart the Graiae who guarded the cave where Medusa slept. Then he must not meet Medusa's gaze which turned everyone to stone. The shiny shield that Athena had lent him he used as a mirror when beheading Medusa.
Perseus receives assistance from several gods and goddesses in his quest to slay Medusa. Athena provides him with a reflective shield to avoid Medusa's petrifying gaze, while Hermes gives him winged sandals for swift travel. Additionally, Hades bestows a helmet of invisibility to help Perseus evade danger during his mission. Together, these divine gifts enable Perseus to successfully confront and defeat Medusa.
Perseus receives three crucial gifts from the nymphs of the North: a pair of winged sandals for swift travel, a reflective shield to avoid direct gaze at Medusa, and a magical bag to safely store Medusa's head. These gifts aid him in his quest to slay Medusa and ultimately fulfill his destiny.
Perseus receives gifts from the gods in the book "Perseus". Hermes gives him a sword, Athena provides a polished shield, Hades lends him his helmet of invisibility, and Zeus gifts him with winged sandals. These gifts help Perseus on his quest to slay Medusa and save Andromeda.