The Hero of Ages by Brandon Sanderson
Book Description
To end the Final Empire and restore freedom, Vin killed Lord Ruler. The lethal form of the mists, called “The Deepness” is back. It is even more powerful than before and humanity appears to be doomed. Having escaped death in the previous book only by becoming a Mistborn himself, Emperor Elend Venture hopes to find clues left behind by the Lord Ruler that will allow him to save the world.
