Xorn

The terrifying creatures in the underneath of Tomeria, mostly located on the The Continent but have been seen in rare quantities in The Archipelago. While uncommon to see there are reports from miners of Gachen that they have seen several of them. They are hungry beasts unable to eat organic foods and thus rely on moving through the ground at rapid speeds to find other metals and precious gems to satisfy their hunger.
Even more uncommon though are reports of them peddling magic items they have stolen from other underground communities such as Kobolds, Drow, or Deep Gnomes and trading those magic items for rare precious gems. There are no known records of this happening in The Archipelago however.