Beyond the Infertile Plains' Northern Region was the vast territory of snowy mountains. No man had ever explored it, and those who tried have all been lost within its endless mazes and formations of thick blizzards.
The extremely cold environment made it difficult for any life of warm blood to survive, especially humans, who were generally considered the weakest at birth.
However, such extreme coldness proved to have little effect on Leon and Rainshine. In fact, the extreme coldness reminded them of the Blizzard Storm Region, which was now formally called the Blizzardpaw Dukedom.
As such, Rainshine easily adapted to the weather. It was like returning to her homeland.
On the other hand, Leon's Ice Law was at the Transcendent level, which granted him a great degree of resistance to the cold environment. Even if that wasn't enough, he still had Transcendent-level Fire Law to negate the coldness among other laws in his arsenal.