Beasts of K

The Beasts of K are a terrifying species of cursed monstrosities that infest the Craneyard.

Biology
The Beasts of K are the end result of a person who has been afflicted with the Mark of K. They are twisted, horrifying mockeries of the human form with wild variations, some being distorted, horrific humanoids, and others being extremely mutated, merely a spinal chord with a head and arms. What is universal however, is their horrific grin that is etched into all of their faces, with sharp teeth that can lock down onto unsuspecting victims. This also is a gruesome tactic in battle, as they can hold off defending parties by using their own numbers against them, transferring half of all damage done to them to the victim of their bite.

The transformation from Humanoid to Beast of K is sketchily known at best. Officer Khel Zouren was shown an image of a woman being visited by a horrific being that left her with the mark, and immediately was left with mild site of mark irritation. At some point, the afflicted are compelled to go to the Craneyard, and some form of mental degradation and heightened aggression kicks in, and the body begins to mutate proper. Proportions enlongate, the body is twisted and mangled, claws grow, and most notably teeth fall out and are replaced by the sharp teeth and grin, and eventually the difference between the person and a normal Beast of K gradually shifts until they are no longer recognizeable as humanoid.

That said, these creatures do have weaknesses; they are repulsed by light and by magics that seem to use something like it, and any Beast of K will always take the full brunt of Psychic damage regardless of where they have something (or someone) in their mouths or not. All Beasts of K also have a critical weakness in that the transformations generally rob them of much of their ability to grab, and as such they cannot climb, making anyone quick and resourceful enough to ascend to the roofs of the Craneyard more or less safe from them.

The Beasts of K are known only to haunt the Craneyard in Rampoon City, with their origin something of a mystery, but implied to have contributed to the downfall of the Craneyard as a viable space to begin with. According to legend, the Beasts of K were created from the split god of beasts; one the hunter, and the other the hunted. They are exposed to the hunter, who gives them the mark, and must seek out the other half within three months, or succumb to the curse eternally.

Trivia

 * The Beasts of K are considered to be under the "Affliction of the gods", and as such, the Remove Curse spell doesn't work on them.
 * Beasts of K have some form of sentience left in them, however it is more or less overpowered by their need to feed on those who aren't afflicted.