Starting from Being Uchiha Madara's Father

Xia Yun got a system that allowed him to become a father in all the worlds, and he could also bring skills and equipment back to the main world where spiritual energy was revived! Uchiha Madara: "I would like to call my father the strongest!" Whitebeard: "Gla la la la... I want to become a man like my father!" … Xia Yun: "You bunch of traitors are cheating me!"