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Even Heroes need support. But not often in our lifes we receive the help of a divine intervention and extra special weapons for the task at hand.
From Wikipedia:
Perseus, or Perseos the legendary founder of Mycenae and of the Perseid dynasty there, was the first of the mythic heroes of Greek mythology whose exploits helped establish the hegemony of Zeus and the Twelve Olympians in the mainland of Greece. Perseus was the hero who killed Medusa.
After some time, Polydectes fell in love with Danae and desired to remove Perseus from the island. He thereby hatched a plot to send him away in disgrace. Polydectes announced a banquet wherein each guest would be expected to bring him a horse, that he might woo Hippodamia, “tamer of horses”. The fisherman’s protegé had no horse but promised instead to bring the head of Medusa, one of the gorgons, whose very expression turns people to stone. The Medusa was horselike in archaic representations (Kerenyi 1959:48), the terrible filly of a mare—Demeter, the Mother herself— who was in her mare nature when Poseidon assumed stallion form and covered her. The issue of her foaling were the gorgon sisters. Polydectes held Perseus to his rash promise.
For such a heroic quest, a divine helper would be necessary, and for a long time Perseus wandered aimlessly, without hope of ever finding the gorgons or of being able to accomplish his mission should he do so.
According to the iconography of the vase-painters, the gods Hermes and Athena came to his rescue. They did not know the way themselves, being of a younger generation of deities, but they knew ancient ones who would know; they led him to the Graeae, sisters of the gorgons, three perpetually old women with one eye and tooth among them. Perseus snatched the eye at the moment they were blindly passing it from one to another and would not return it until they had given him directions. He also received winged sandals, a magic wallet (kibisis), the cap of Hades that made one invisible, also known as the Cap of Darkness, an adamantine sickle such as the one that reaped the genitals of Uranus, and a mirrored shield. With all this, “Like a wild boar he entered the cave” where he came upon the sleeping gorgons. By viewing Medusa’s reflection in his shield he could safely approach and cut off her head. Seeing her own reflection in the shield, the Gorgon herself was turned to stone. The other two gorgons pursued him, but in his cap of invisibility he escaped.
