Tonton Streaming Thundarr the Barbarian (1980) S1E5 - Treasure of the Moks

Thundarr, Princess Ariel, and Ookla come to the aid of the Mok Chieftain Oblach against Captain Kordon, Queen of the River Pirates, who is after the Mok's hidden treasure and intends to use the "fire lances of the ancients" to get it.