There was a type of riddle that described an animal in terms of a combination of animals but only one attribute of each of these creatures needed to be sought that was like the target animal. So for the Chimera, the puzzler had to consider and hold in his head attributes of lion, goat, eagle and snake.
Lion: - perhaps - roaring, tawny, sharp toothed, claws, strength etc.
Goat: - perhaps - horns, herding, swift running, etc............ and then think of a creature that combined one of each attribute.
Any riddle puzzlers out there?
I have an answer!