In the workshop, Iroh hooked up one of the parts to a power source and began flipping all the tiny switches at the base, watching as the globular portion swelled and shrunk. "This is like something I found left behind in the tea shop," he said. "My nephew broke it trying to get it to do something more. But there were hundreds of them back there..."

He unhooked that part and considered the next, in turn. "Isn't ingenuity wonderful? When it's not being used to kill you, of course."

It didn't look like he knew any more about it than that, though. He glanced at Korra. "What have you found?"