The Great Universal Sphinx is an alien entity of unknown origin residing on Planet Krell. The Sphinx once challenged the Paladins of Voltron with several tests. The tests were to prove themselves worthy of the information he possessed about the location of a Yalexian Pearl.
The Great Universal Sphinx is a character exclusive to the Voltron: Legendary Defender comic series.
The Sphinx at one point mentioned he'd visited planet Earth and was the original creator the game that would become chess.
The Great Universal Sphinx is a reference to the mythological Sphinx.