The Yin-Yang Entropy Immortal Art

The Eastern Ghosts, Western Demons, Southern Buddhists, and Northern Bears surround the Great Yu, which has no allies. After offending the great clans, Yang Xiao is sent to the lowest unit in the military camp: the labor corps, where he carries armor, collects corpses, and cleans up after the army. Everyone thinks he's useless. Only the battered, cornerless book in his dantian stirs awake: half a volume of the Yin-Yang Entropy Immortal Art, and a cultivation history that can turn the tide.