Is a troll any more definable than a dragon?
Traditionally, folkloric trolls are unhelpful/antagonistic supernatural entities with a habit of becoming recognizable local landmarks after they get turned to stone. They're basically a Norse-only folktale concept so they cover a lot less ground than dragons, which are pretty much global. In the greater fantasy zeitgeist they've lost some of their already-limited specificity, sometimes allowed to retain their magical powers but frequently just being framed as large dangerous monsters with an optional healing factor.
In Aurora, trolls are Stone-influenced humans with a lot of natural armor.























