Trolls are a race of Underworld dwellers. They have green skin and are considerably larger than goblins. Their large, knobbly noses, thick eyebrows and broad mouths may make them look comical, but their green hide is considerably harder to pierce than that of a human. The strength is equal, though.
A troll

One of the trolls serving Marda.

Most, if not all trolls sound a bit like a speaking pig when talking.