"Howl~~~~" Under the bright round moon, the long howl of a wolf echoes through the night sky of the snowfield, a vast and freezing field wrapped in darkness. Who knows how many creatures tonight will lose their lives to the cold, starvation, or the teeth of predators. While the environment is shrouded in the trouble of cold and snow, the small house on the snowfield is immersed in warmth. A crystal energy furnace is burning vigorously in the middle of the ice house, with orange flames licking at the metal grid above it. Strips of meat are evenly spread over the grid, roasted by the flames, exuding a strong aroma. Large droplets of golden fat fall through the grid, hissing at the temperature of the crystal energy furnace.