Elf

Elves are creatures who appearance-wise doesn't look too strange for the human eye, but they have next to nothing in common. They used to inhabit most of the forested areas of the world but they have continuously been driven out and hunted, so much that today their numbers have dwindled fatally and their only true "sanctuary" is in the great forest of Torovir in High Heartland.

Physiology
While their diet mostly consist of berries, fruit and roots, once a month they turn into savage beasts not unlike wolves who hunt game or in some cases humans during one bloodthirsty night every month.