The Hero of Ages: Book Three of Mistborn

They are called Allomantic savants. Men or women who flare their metals so long, and so hard, that the constant influx of Allomantic power transforms their very physiology.

But, well, we’ve certainly made a mess! Destroying the world. That’s no mean feat, if you think about it. I wonder if we should be impressed with ourselves.”

“The days of mist have come! The endless ash now falls! The earth shakes and trembles. You can condemn me, but you must not ignore me! The world will soon die! If you want people—in all of their forms—to survive, you must act! You must be ready! For you may soon need to command our people to accept the Resolution!”

Three hundred twenty-seven men. One-sixteenth of those who fell sick. One out of sixteen Allomantic metals.

“But I fear

By taking abilities from one person and giving them to another,

She would never know, nor did she need to know.

Four physical metals, four mental metals, four enhancement metals, and four temporal metals.”

but I worried regardless.