The Riddler Goddess The winged sphinx of Boeotian Thebes, the most famous in legend, was said to have terrorized the people by demanding the answer to a riddle taught her by the Muses and devouring a man each time the riddle was answered incorrectly. The Sphinx’s Riddle – What goes on 4 legs at dawn, but two legs in the day and 3 legs in the evening? Eventually Oedipus gave the proper answer: man, who crawls on all fours in infancy, walks on two feet when grown, and leans on a staff in old age; the sphinx thereupon killed herself. The Sphinx later became a Guardian of the Dead. The Image of the Sphinx was put on tombs to protect the dead. The most famous image of the Sphinx is the Great Sphinx Statue at the Pyramids of Giza.