The Hero of Ages (Mistborn Series #3)

Who is the Hero of Ages?

To end the Final Empire and restore freedom, Vin killed the Lord Ruler. But as a result, the Deepness---the lethal form of the ubiquitous mists---is back, along with increasingly heavy ashfalls and ever more powerful earthquakes. Humanity appears to be doomed.

Having escaped death at the climax of The Well of Ascension 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 …