Trogs

Trogs are prehistoric humanoid creatures that reside in depth of Mammoth Cave, Brownsdale, Kentucky.

Characteristics
Trogs appearance resembling humans. Their faces had some similarities to modern man, but other parts looked more prehistoric. Their bodies were short, under five feet tall even when they held the torches high and tried to stretch to see above them, with folds of loose, pallid skin that was streaked with dirt and heavy veins. Beneath their flesh muscles flexed in powerful-looking arms and legs; the arms reached nearly to the ground, with hands that would have looked normal except that the thumb and fingers were as thick as small tree branches and ended in substantial wickedly pointed nails that were at least two inches long. They wore no clothing, but cannot be distinguished if there were males and females, as they had too much skin hanging everywhere to see a difference. They also had excessive fat growth that provided enough insulation to cope with the cold temperature inside the cave. Their legs were jointed at the knee, but the lower part, the shin, was so short it was almost nonexistent—they had huge thighs, knees that were almost as wide, then a small bend that culminated in massive, heavy feet that were bigger than their bulbous heads.

Trogs made bizarre sounds that were a cross between grunting and bubbling breaths, as though their lungs were permanently congested from the cave’s unrelenting humidity.

Trogs apparently lacks any forms of intelligence and sentience, acting completely like an animal. They eat to survive, and that’s all. Despite that, they possessed some form of mentality pack and some lesser forms of emotion. If one member of their pack died they will mourn briefly, and if they found out if someone killed one of their pack member, the other members of the pack will immediately retaliate to the killer.

Trogs had a fondness in human flesh and fed on it. They mostly ate the flesh raw without indication of cooking with fire like prehistoric humans. Moreover, they also afraid of fire. Sam called them as "freaks of evolution".

Powers and Abilities
Trogs are prehistoric creatures without any supernatural powers. They only relied fully on their biological capabilities.
 * Super Strength - Trogs possessed enormous physical raw strength to knock human with ease.
 * Claws - Trogs possessed sharp claws to attack.
 * Fangs - Trogs possessed sharp fangs that used for chewing human flesh.
 * Powerful Jaw - Trogs possessed powerful jaw that able to crush human bone.
 * Resilience - Trogs are quite resilient, thanks to their biology, so they can survive several shots of sawed-off shotgun before died.

Weaknesses
Trogs has no specific weaknesses attributed to them. As prehistoric creatures, they have no any means recorded to exactly killed them, as nobody encountered and recorded it before, even by the Men of Letters, which managed only recorded the missing person incidents and leave no explanation on it. Despite that, Sam and Dean found out hat they were still mortal and killable using ordinary means.
 * Mortality - Bullets were able to wound and kill them. Despite that, it required several shots to take it down, even the shots came from sawed-off shotgun. Cave collapse effectively crushed them and killed them. If fire and cave collapse did not kill them, being trapped in the cave without any means to escape could starve them to death.
 * Fire - As a cave dweller and familiar with darkness, Trogs are afraid of fire. Firelight and sparks terrified them and keep them away. Moreover, Trogs can be killed by explosive, Beau Pyle killed them by grenade explosion.

Appearance

 * Supernatural: The Usual Sacrifices