Mystery of the Dark World Dragon Ball : Season 9 Episode 30

The Bansho fan has no effect on the flames because the fire was forged in the Magical Furnace. Goku and Chi-Chi must travel to the other side of the world to Mt. Five Elements, where they must venture through the Gate of the Five Elements into the Dark World. There, they must find Tajoro, the keeper of the furnace, and convince her to help put out the flames.