Board Thread:Fun and Games/@comment-29383865-20160804115920/@comment-210.186.52.106-20160817084617

Iron sand manipulation works on the principle of electromagnetism. Basically, she exerts an electricity based magnetic pull on the iron sand and clumps them together before vibrating them to achieve high-cutting power.

I'm not sure if iron sand is as commonly found as depicted in the series though. It looked like they're everywhere.