Nemean Games
Hypsipyle became involved in the story of the infant Opheltes, the Seven against Thebes, and the origin of the Nemean Games. On their way to Thebes, the Seven, in need of water, stop at Nemea, where they encounter Hypsipyle. Because of the discovery of her having saved Thoas, Hypsipyle has been sold into slavery to the parents of Opheltes, becoming his nursemaid. While helping the Seven to get water, Hypsipyle sets Opheltes down, and he is killed by a serpent. The Seven kill the serpent, and the seer Amphiaraus, one of the Seven, renames the child Archemorus, meaning the "Beginning of Doom", interpreting the child's death as a harbinger of the Seven's own impending doom at Thebes. The Seven save Hypsipyle from being put to death and hold funeral games in the child's honor, which become the origin of the Nemean Games. Hypsipyle's sons arrive, compete in the funeral games, and rescue Hypsipyle from her captivity.