Sky Split: Bloodline of Meridian

The sky split for three thousand years, the earth was plunged into extreme cold, and only the aurora hung forever. Since then, humankind has been divided into two: underground, the Jade Blood Tribe lives in white jade hanging coffins, living in constant temperature as exquisite ritual specimens, losing the courage to face the wind at the cost of longevity; surface, the Bronze Bone Tribe uses bone gold as armor in the wind and snow, evolving into evolved beasts, fighting for a pure meal in the short-lived pain. This is civilization's longest winter. There are only two ways for mortals - to live as exquisite specimens underground, or to live as ferocious beasts on the surface...