Bereskarn

Bereskarns are described as "Bears covered in spikes" and are first seen in the Dalish Elf origin. They are also seen in the mage origin story in the Fade, as a demon of Sloth. If you answer three of the demon's riddles correctly, he will teach the bear form to Mouse.

They would also appear to be linked to the blight and prone to appearing in infecting areas, much like blight wolves and other ghouls.