Creatures of myth - Apophis Picture
The serpent Apophis of egyptian mythology (and the namesake of my fav. stargate character). Legend says that it lives in Duat, the underworld, and tries to devour Ra on a daily basis (the reson for the sunset- Ra goes into Duat to battle Apophis). Seth was once sent to slay Apophis, but the myths are mixed on whether or not he succeeded.