Make the level 12 Ranger power apply in the Ice Queen area
The level 12 Ranger class power removes the energy cost penalty for moving through rough terrain, rocky terrain, and swampy patches in wilderness encounters. Since the Ice Queen area is open to the elements, it would make sense for the power to also remove the energy cost penalty for moving through the snow-covered ground and icy patches there. This would be a minor practical bonus to a class power that is otherwise not very useful.