I was reading the era 2 Mistborn books and I was surprised that Marsh was alive. Did harmony make him Immortal, or at least immune to aging? And then I thought about the Lord Mistborn, and how it says that his buttons from his favorite smoking jacket were auctioned off in one of the broadsheets. Coppermind says he governed for 100 years before stepping down. Is he also immortal or immune to aging, or does he have a prolonged life?