Clan Cultivation: I am the Clan's Guardian Spirit Beast

[Fantasy beast story, no human transformation, no romantic pairing, family ensemble story] Reborn as a black water serpent named Mo Xuan, he obtains the clan's guardian spirit beast system, forms a bond with the Zhou family's ancestor, and becomes the Zhou family's worshipped spirit beast. From then on, they share the glory and prosperity of the family, which gradually grows stronger. Mo Xuan also gradually becomes the strongest, and the name of the Zhou family, the beast-taming family, eventually resounds throughout the myriad realms.