Did you need two hands two be a blacksmith?

Many of the methods of working with hot iron on an anvil are easier with two hands. That being said the key to being a good blacksmith is in being able to judge how hot the metal is by the colour of it. A one handed person could do this just as well as any two handed person. There are jigs and methods to hold hot steel that don't require you to use you hands. Like any good blacksmith you will make tools that enable you to do your work better and more effiently.