Nuclear blast wasteland, debris everywhere. Yu Wangjiang was besieged by more than a dozen mechanical mercenary groups, with a crumbling shanty town behind him. "Hand over your prosthetic transformation manual and I will spare your life!" He grinned and popped out a rusty scalpel from his fingertips - no one knew that this wandering doctor who couldn't even afford nutrients was once the only "holy hand" in the empire that could repair the core of ancient armor. Three seconds later, he transformed the most ferocious Wolf Fang leader into an obedient mechanical war dog in public. The whole city was shocked! There is a high reward on his head on the black market, and top families beg him to save their lives. But Yu Wangjiang only stared at the depths of the underground city: buried there was the ultimate prosthetic body that was sealed by his own hands ten years ago and could swallow the entire wasteland - that was himself.