Since Han Sen had nothing better to do, he tried using Consume. He did not know if he could use it now that he was in human form. It surprised him that he was actually able to activate the geno art.
When he used Consume, something changed in his stomach. It was like a xenogeneic's, but not as strong. His stomach became much stronger than usual, though.
As he practiced Consume more and more, the power of his stomach increased. It wasn't long before Han Sen was able to digest steel. Whenever he swallowed a hunk of steel, it'd be converted to energy. The digestion capabilities were scary.
Han Sen was afraid that Consume might affect his body, but after a few tests, his worries were eased. There were no negative side-effects, and so he continued to practice the skill.
Han Sen let Xie Qing King and the others practice Consume, as well. Aside from Metal Eater, though, none of the others were able to make any headway with it.