Magnetism is the occurrence between two poles with atoms and compounds. Everything has a magnetic field although weak enough not to be felt. There two poles to the magnetic field, positive north and negative south. They repel each other when faced with the same pole, but come together when opposites. Magnetism can cause severe pressure, levitate objects or even project them.
As a shinobi in the NV, magnetism is controlled by converting your chakra into a strong magnetic force which enables you to manipulate magnetic objects such as iron.
Iron is a strong and hard magnetic silvery-gray metal. It is ductile and malleable, and has a very high tensile strength(which mean it has a high resistance of breaking under tension). The boiling point of pure iron is about 5,000 degrees Fahrenheit, and its melting point is around 3,000 degrees Fahrenheit. Iron can also be worked to get a desired shape or thickness and is one of the three naturally occurring magnetic elements besides Nickel and Cobalt.
I would like to use iron in battle because it is everywhere. And by everywhere, I mean in the earth. Iron is also versatile. As an offense, I could shape the iron in any way I want and also use the iron in the ground to launch blind side attacks towards my opponent. Though iron is not as durable as steel, it can still take a beaten and not be broken which makes it a very effective defense. Those are just some of the many ways you can utilize iron and I'm willing to unlock its potential and make it even more fearsome than it is now.