Finally after the long battle with lion-o and Mumm-ra drew to a close, Mumm-ra lyed on the battlefield defeated. Lion-o knew he could not let this monster live. he powered up the Sword of Omens, pointed it at Mumm-ra's chest and charged at him. ''Good bye Mumm-ra'', he yelled, as the charged at him. Mumm-ra knew he could not servive the sword's energy this time. But Mumm-ra could not let the cats win. Mumm-ra then used a spell to plunge himself underground. Lion-o dug, and dug with the Sword of Omens, he even started to use his own claws, but he could not get to Mumm-ra. He was to deep underground. So Lion-o had a wizard from the Clarics put a deep barrier within the dirt so Mumm-ra can't be reawakened.
After six long years of peace Lion-o and Pumyra were finally having a son. During those years, Thundera was rebuilt, every slave was freed, and the animals were united again, and acted equally towards one another. While at a Thunderian hospital, Lion-o's and the rest of the Thundercats legacy was about to be born.
''My lord, the birth was succecful, you can now see your son'', the docter had said to Lion-o. He walked in the room. Tygra, Cheetara, Wilykit and Kat, even Panthro had been waiting for him in the room. Pumyra smiled at him as he walked in. He smiled at his son and Pumyra. He looked at his little son. He looked just like Lion-o exepeted he had spiky dark redish brown hair, the end of his little sideburnes were white and her had amber eyes just like his mother. Lion-o piked him up and held him. ''Have you decided on a name yet'', the docter asked him. ''Yes'', Lion-o and Pumyra said at the same time. ''We've decide on Leon'', Pumyra said. A few monthes later, Tygra and Cheetara also had a son named Tygara. Wilykit had a son named Kiteon. Wilykat had a daugter named Kitena. Panthro also had a daugter named after one of the first Thundercats, her name was Panthera. Ironicly they were all the same age. Due to there parents heroism they were all Thunderkittens. And Leon was prince of the Thundercats.