Pluto (mythology) authorship of the lyrics that have survived as the "Orphic Hymns", among them a hymn to Pluto. Orpheus's voice and lyre-playing represented a medium of revelation or higher knowledge for the mystery cults. In his central myth, Orpheus visits the underworld in the hope of retrieving his bride, Eurydice, relying on the power of his music to charm the king and queen of Hades. Greek narratives of Orpheus's descent and performance typically name the ruler of the underworld as "Plouton", as for instance in the "Bibliotheca". The myth demonstrates the importance of Pluto "the Rich" as the possessor of a
Hades of the Underworld, which was when Heracles shot him with an arrow as Hades was attempting to defend the city of Plyos. After he was shot, however, he traveled to Olympus to heal. Besides Heracles, the only other living people who ventured to the Underworld were also heroes: Odysseus, Aeneas (accompanied by the Sibyl), Orpheus, who Hades showed uncharacteristic mercy towards at Persephone's persuasion, who was moved by Orpheus' music, Theseus with Pirithous, and, in a late romance, Psyche. None of them were pleased with what they witnessed in the realm of the dead. In particular, the Greek war hero