Spirits played a role in the creation of both the Sword of Plun-Darr, possessing a Thunderian blacksmith to forge the weapon, and the Sword of Omens, due to the blacksmith retaining the spirits' knowledge to forge a weapon similar to the previous creation. In "Native Son", it's revealed that the Ancient Spirits have been worshiped by the Tiger Clan after their ancestors were exiled to the mountains due to their continued loyalty to Mumm-Ra. When the Tiger Clan was on the verge of dying out from an epidemic, the Ancient Spirits offer to cure them in return that the newborn Tygra (who would grow up to become their stated primary enemy, not Lion-O) be sacrificed. When Javan, the leader of the clan and Tygra's biological father, refused to honor his end of the pact, the Ancient Spirits bound the souls of the Tiger Clan to the living world as shape-shifting shadow monsters that obey their every command. Some years later, a fully-grown Tygra found his way back to his ancestral home and freed his kin of the curse. Other characters Jaga (voiced by Corey Burton) - Jaga serves as head of Thundera's cleric warriors, possessing knowledge of ancient secrets, superhuman speed and the power to project lightning from his staff. In his prime, he used the "Sword of Omens" in an epic duel against Ratilla. At the start of the series, Jaga sacrifices himself to ensure Lion-O and his group escape. This resulted with him being tortured into revealing the location of the "Book of Omens" to Mumm-Ra, though doing his best to resist the villain's magic when sealed within a lantern, eventually his free will wavers along with his physical form. Though Jaga destroys the lantern that was keeping his soul intact to save Lion-O from Mumm-Ra, part of his soul took residence within the Book of Omens and becomes Lion-O's guide. Claudus (voiced by Larry Kenney) - The previous King of Thundera/Lord of the ThunderCats, Claudus is a stern father to Lion-O, his biological son, and Tygra, his adopted son. His wife, the unnamed previous Queen of Thundera/Lady of the ThunderCats, had died giving birth to Lion-O. When Grune and Panthro had fought bravely to get promoted to general, Claudus told them that he has given the job to Lynx-O. Claudus was the one who sent Panthro and Grune to find the Book of Omens. When Lion-O was