I Picked Up Houtu from the Start and Slashed My Way Across Honghuang!

The Dragon-Han Calamity comes to an end, leaving Honghuang in ruins. The Twelve Ancestral Wus, born from Pangu's blood essence, stand guard over heaven and earth. Zhu Xuan, a modern transmigrator who unexpectedly arrives in Honghuang, possesses an immortal body and an unmatched divine blade. After accidentally killing the Crown Prince of the Black Bird, he encounters Houtu, the Ancestral Wu of Earth. Using his foreknowledge and secret treasures, he becomes a shaman of the Wu clan and guides the Ancestral Wus in their cultivation, but he is also quietly drawn into the calamity of the Wu and demon races and the Heavenly Dao's game of chess.