The sphinx is a stone catlike creature found in Egypt. It possesses the power of heat vision. It rampaged through Egypt until it was turned to stone by the Pharaoh, Snifaru.
In the episode Sphinx Jinx, the sphinx is brought to life when Sir Loungelot tells Flicker to take a picture of him on its head. The sphinx went on a rampage, but the dragons distracted it with a ball of yarn, until they found Snifaru's crown, and got a sundial, both of which were used to harness the sun and turn the sphinx back to stone. However, it was still able to growl at the dragons.