Why is Wang Lin called Wang Mazi?

Wang Lin is the hero in Xian Xia's novel Xian Inverse. A mediocre teenager accidentally stepped into the fairy road, went through hardships and hardships, stepped onto the peak step by step, and made a name for himself. In the novel, Wang Lin used to be kind-hearted. With the killing of Wang's whole body, the detention of Wang Lin's parents' souls and extortion of Wang Lin, Wang Lin's character has undergone tremendous changes and become cold-blooded and heartless. And killing people like hemp, everyone called the protagonist Wang Mazi, so the name spread.