The boy threw a comb behind them, which became mountains with thousands of teeth, which the nixie got through with great effort. The girl threw a mirror behind them, which became a mountain too slick for the nixie to climb. She went back to get an axe, but before she could chop through the mountain, they escaped.
As the boy threw a comb behind them, it morphed into towering peaks with countless teeth, which the nixie struggled to conquer. The girl then flung a mirror in their wake, creating a mountain that was too slick for the nixie to climb. She went back to fetch an axe, but before she could cut through the mountain, they managed to flee.