No one knows where, when, and how he came to be, except for the legend that tells everyone that, as long as there's violence, and war, a silver cloud shall arrive and drop off the iron-clad, metallic cavalier, undefeatable Silver Cumulous Knight.
His name? No one knows. Like a smoke travelling throught tabacoes and nicotine, he comes through the battlefield, defeats the enemies and then vanish like evaporated vapour.
Therefore, that is how the legend began.