Leviathite

Leviathite is one of the unnatural metals of the thirty Arthosian Metals. It comes from the horns or scales of Ksyantos, and is black with hints of green. It is constantly slick with water, and turns blood green on contact. It is what Rog ot Jokosz is made from, and is one of the most common of the unnatural metals (that being said, it is still extremely rare).