Oedipus play was "Laius", the second was "Oedipus", and the third was "Seven against Thebes". Only the third play survives, in which Oedipus' sons Eteocles and Polynices kill each other warring over the throne. Much like his "Oresteia", this trilogy would have detailed the tribulations of a House over three successive generations. The satyr play that followed the trilogy was called "The Sphinx". As Sophocles' "Oedipus Rex" begins, the people of Thebes are begging the king for help, begging him to discover the cause of the plague. Oedipus stands before them and swears to find the root of their suffering and
Oedipus Rex widely-known version is, ""what is the creature that walks on four legs in the morning, two legs at noon, and three in the evening?"" Oedipus correctly guesses, ""man"", who crawls on all fours as an infant, walks upright in maturity, and leans on a stick in old age. Bested by the prince, the Sphinx throws herself from a cliff, thereby ending the curse. Oedipus' reward for freeing Thebes from the Sphinx is its kingship, and the hand of the dowager queen, Jocasta; none then realize that Jocasta is Oedipus' true mother. Thus, unknown to all of the characters, the prophecy