Board Thread:False Info and Speculative Discussion/@comment-24439517-20140722075658/@comment-99.13.215.202-20140722110030

Kev is partially correct.

The Berserkers are are a particular type of shapeshifter called "skin-walkers".

Shapeshifters: a person with the ability to change their form at will.

Skin Walkers: a person who uses the skin or/and bones of an animal to transform into the animal or call upon the animal's power.

They are supernatural.