Thundarr the Barbarian - Season 2 (1981)

The evil wizard Sarott loses a battle against Thundarr and finds the miniaturized City of Thieves in a research lab. Its ruler Vortak promises Sarott a free rein to use the city's advanced army to enslave humans and other wizards if he can restore it to normal size. To do so, he'll need the Gauntlet of Power which can boost his magic to enlarge the city.

Thundarr, Ookla, and Ariel are after Janus. He and a race of hawk mutants attack villages and the train route of Tye. The group is baffled when it turns out Janus is actually Gemini, the two-faced wizard in disguise seeking revenge.

During a battle with a supposed wizard with unusual magic named Yando, Thundarr is struck by red negative lightning which significantly diminishes the power of his Sunsword. The weapon can be restored at the nearby Pool of Power, but it is stolen by Yando who craves the Sunsword's power for himself.

Thundarr's friend Thorac is accused of stealing a village's fuel and is about to be boiled alive over a geyser when the barbarian rescues him. Thorac is granted a reprieve when Thundarr and the group investigate the crime. They find out that the town's sheriff Korb is in league with the evil wizard Artemus. Artemus had stolen the fuel to power his Death Ship and gain the approval of the Council of Wizards.

Thundarr, Princess Ariel, and Ookla battle Vashtarr, an evil wizard who steals the Crystal of Prophecy that can give the details of his downfall. When it shatters in his efforts to retrieve it, the prophecy is foretold as they learn three women will unite to defeat him. Maya, an element-shifter buried in the ruins of the old city of Endorr. Cinda, a hermitic barbarian living in the Canyon of Death whose staff grants her great strength. And Valerie Storm, a fashion model from Old Earth who is abducted and taken prisoner by Vashtarr himself.