Gran Transfiguración
“Later that night, he performed the Great Transfersion, an awesome display of power by which he transformed most of Chicago—buildings, vehicles, streets—into steel. That included a large portion of Lake Michigan, which became a glassy expanse of black metal. It was there that he built his palace.”
Great Transfersion refers to an act performed by Steelheart at the beginning of his reign in Newcago. It was a grand display of his Epic Transfersion ability that transformed non-living dense (i.e. solid or liquid) material into steel. It transformed most of the old Chicago, including portion of Lake Michigan, and reached dozens, or possibly hundreds of feet down into the ground. During early years of his reign, Steelheart made his Diggers carve out several levels of understreets in the steel.