My Life as a Tomb Robber

Fifteen years ago, my father and three uncles built up a family fortune on robbing tombs, and they fled to Hong Kong due to the aftermath brought by tomb robbing. Fifteen years has passed, I have to decipher the secret signs left by father and inherited their mantle. Marquis Wu, Kunlun s*aves, soldiers from the nether world, Exterminate Man, The Legend of Deification, the more I follow their steps, the more perturbed I grow. The hint directs at the Sand Sea Battle where the zhangs takes a turn from flourish to decadence and hundreds of lives are wiped out. What, exactly, were they looking for in the forbidden area Lop Nor? What, exactly, had been dreading them?