Space Wolves
The Space Wolves are often viewed as barbarians by outsiders, such as other Space Marine Chapters and Astra Militarum regiments. This is something they embrace to the fullest, decorating their armour with totems and fully embracing the shear ferocity that they can unleash in battle. However, the Canis Helix which is used to imbue the warriors with wolf like attributes occasionally leads to mutation.