I have heard that Libya invaded and conquered Egypt once upon a time by killing the King through placing him alive in a coffin and installing a Pharoah to be the Task Master that would put the Egyptians to work building the Pyramids which would serve as the Tombs of Egypt’s Prince upon completion by placing him alive inside and sealing the Pyramid and the Sphinx is the Tomb of Pharoah provided by the Egyptians after retaking their country. The Sphinx is a more complicated design and a fitting punishment for the Libyans who had invaded the land of Egypt.
I heard this story a long time ago.