Formorian (Deep Roads)

The Deep Roads Formorian is much different to the usual type, it tends to stick to its own company and has devolved into a more caveman like state.

They are rare to come across as it's rare to find the Deep Roads in the first place. They have usually lost their ability to speak Common and Giant and tend to smash first, ask questions later. They are still intelligent beings and can be reasoned with depending on the circumstances. The best way to beat a Deep Roads Formorian is to find somewhere too small for it to get into, otherwise it can outrun and crush you within seconds.

It also seems that they have a slightly less effective regenerative ability compared to their surface dwelling cousins, most likely due to the environment they live and the lack of nutritious meals.