Mumm-Rana’s Belt is the eighty sixth episode of ThunderCats (original series).
Luna and Amok journey to the White Pyramid and take Mumm-Rana's belt, destroying her pyramid in the process. Pumyra tries to stop her but she gets sealed up in the pyramid. Amok becomes jealous when Luna no longer needs him and during his "little temper", he accidently frees Pumyra. Then Luna forces Slithe and Monkian to help her ambush Lion-O and Panthro.
During the battle with "Princess" Luna, Lion-O uses the Sword of Omen to restore Mumm-Rana and she retakes the belt and defeats Luna. Amok later arrives and destroys the belt.
If you find success, don't forget those who helped you get there.