younger demigods. In The Last Olympian, a few Muses are shown playing some tunes on Olympus. Their hearts were not into it because of Kronos' attack on Mount Olympus while the Gods were out fighting Typhon. Calliope – The Muse of epic poetry. Clio – The Muse of history. Erato - The Muse of love poetry. Euterpe – The Muse of music. Melpomene – The Muse of tragedy. Terpsichore – The Muse of dance. Thalia – The Muse of comedy. Urania – The Muse of astronomy. Narcissus – A hunter who was renowned for his beauty and disdained those that had loved him. Nemesis puts a spell on him that causes him to fall in love with the reflection of himself in the water where he dies upon not being able to leave his own reflection. After Gaea opened the Doors of Death, he was resurrected. In The Mark of Athena, Narcissus is encountered by Hazel Levesque and Leo Valdez at the Salt Lake in Utah where the demigods are looking for the Celestial Bronze which is needed to help repair the damaged Argo II. When Narcissus realizes that Hazel and Leo have managed to steal his bronze plate which he uses to be able to admire his own reflection, he and a mob of nymphs runs after them trying to kill them. Oracles - The Oracles are both beings and places that can give prophecies in Greek mythology. There are five of them. Four Oracles are associated with Apollo. Oracle of Delphi – Apollo's Oracle of Delphi resides in the mummified remains of its host, until its power was transferred to Rachel Dare in The Last Olympian. At the end of World War II, the oracle issued the Great Prophecy, saying a child of the Big Three (Zeus, Poseidon, and Hades) would determine the preservation or destruction of Olympus. This caused those gods to form a pact not to father more demigods. In Percy Jackson: Sea of Monsters, the Oracle of Delphi is voiced by Shohreh Aghdashloo. In the musical, she is portrayed by Carrie Compere. Trophonius – Son of Apollo and half-brother of Agamethus, he and his brother's attempt to steal the riches of King Hyrieus ended with Trophonius reluctantly decapitating Agamethus to save himself, despite him having begged Apollo to save them. Later, he became guardian of an oracle which bears his name, reputedly the oracle that