A devoted servant to Count Marzo, Nepthu was devastated when his master was transformed into a powerless old man and vowed revenge. Without magical ability of his own, he spent years scouring the Sands of Fire and Sands of Time until he was also an old man. Nepthu eventually found the Temple of the Sun and within it the Sun Scarab and was transformed into a young wizard with a fervant desire to control the universe. His scarab was destroyed by He-Man, leaving him powerless, but he transformed once more when he pledged his devotion to King Hsss during the Second Ultimate Battleground. Nepthu has powerful magical abilities that include freezing energy blasts as well as the ability to block telepathy and create an entire army made out of sand.