Reaver

Roaming the tall grass fields dragging a rusty claymore against the course soil, held aloft by a hunched man covered in blood-caked hair forming a ridge, running from the creature's canine head over its hunched back and under torn hide armour. Spotted fur, stained with filth and gore, covers the body with the only visible elements being its toothy maw, dod-like legs ending in claws that clench whatever iron it could scavenge. The air surrounding it is still and dead, with the only noise left out from the beast being a cackling of a hyena.

Creation

These beasts resemble hyenas but in the form of men, they however share no blood relation. The Reavers are born from canibles who starved refusing to eat anything else but the flesh of other men. This leads to many Reavers appearing in prisons, where they break out with their unnatural strength.
The other way they are created is that after massacring towns hyenas follow behind preying on the shower of blood and gristle, the hyenas transform into lesser Reaver, which takes up the original Reaver's awful mission to kill and destroy anything in their path.

Cure

The only known way to revert the transformation is the oils extracted from the root of a Tandothel.