Thank you for the opportunity to help you with your question!After being restored to life, Osiris became king of the underworld. In ancient Egyptian mythology, the underworld, also known as the duat, had great significance since the ancient Egyptians believed a person could not enter the realm of the gods without going to the underworld. Once there, a person's heart would be weighed on a scale, and if the person's bad deeds outweighed his good, a monster with the head of a crocodile would eat the heart. Horus became his father's representative in the world, and mediator between the world above and the underworld. Horus guided the souls of the dead to the throne of his father, Osiris, in the underworld.
Isis and Horus both wanted revenge on Set for the death and subsequent
descent of Osiris into the underworld. Horus also wanted to claim his
divine inheritance to rightful kingship that had been usurped by Set.
Horus and Set battled each other with magic, first by racing in stone boats.
Horus won by making his boat of plaster and wicker. Next, they changed
themselves into hippos to see who could stay underwater longer. Horus
wanted his mother to kill Set while he was under the water in hippo
form, but she refused to kill her brother. Horus hid from Set, but Set
found him and gouged out his eyes. According to one version of the myth,
the goddess Hathor restored his eyes, but another myth states that only
one eye was restored by the god of healing, Thoth. The struggle ended
when Horus destroyed Set's power by ripping off his testicles.
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