Tang San and Xiao Wu giving birth to the Radiant Goddess Butterfly spirit's daughter might be because they possessed the Radiant Goddess Butterfly spirit's successor, which was also their daughter Xiao Wu. The Radiant Goddess Butterfly spirit was an extremely rare spirit that only extremely lucky people could obtain. And it was precisely because Tang San and Xiao Wu possessed this kind of rare spirit that they obtained the qualifications to inherit. In addition Tang San and Xiao Wu might also use some special techniques and inheritances to let their daughter Xiao Wu also possess the ability of the Radiant Goddess Butterfly spirit. For example, Tang San might teach his daughter some special fighting techniques to let Xiao Wu better display the advantage of the Radiant Goddess Butterfly spirit. Or Xiao Wu could also constantly improve her spirit ability through her own hard work and cultivation to become the successor of the Radiant Goddess Butterfly spirit. Tang San and Xiao Wu could give birth to a daughter with the Radiant Goddess Butterfly spirit probably because they possessed the Radiant Goddess Butterfly spirit's inheritor and through some special techniques and inheritance let their daughter also possess the ability of the Radiant Goddess Butterfly spirit.