The Strongest Golden Kidney System

Ye Yun, a teenage boy who sold his kidney to buy an iPhone, is transported to a martial arts world on Cang Yan Continent. This hapless boy finds that he is not only a martial arts failure, but also has an evil second uncle who killed his father, and is threatening him to practice black magic kung fu. He then has no choice but to save himself by participating in the Ye family's test to determine who leads the family! When he finds himself in this helpless situation, he discovers that his kidney can help him make magical elixirs and even functions as a smartphone...

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This manhua was rebooted under a new name (修真肾斗士). The WebComics translation follows the original manhua.