Nehalenia's Mirror

Nehaleni's Mirror is a magical artifact with oracular abilities.

Aridea, stepmother of Renfri and Fredefalk's second wife, owned such a mirror.

In Act IV, Alina, a girl from the village of Murky Waters, is said to have owned a mirror, but she broke it. Why she did so, no one knows, but finding the shards and mending the mirror is part of a quest that's required to finish the game.