Wendigos

The Wendigos are the ultimate antagonists of Until Dawn: Oblivion. They were humans who have been transformed into powerful cannibalistic monsters by an evil spirit after eating the flesh of other humans.

Backstory
In 1952, a structural failure caused part of the mine to cave in, trapping over 30 miners. A rescue team later found only 12 survivors. The miners who were still "missing" were assumed to have starved to death, but it is clear that the survivors resorted to cannibalism to survive.

The survivors began to display unusual physiological characteristics, and a cover-up ensued as they were illicitly confined in the Sanatorium for study. The staff observed and experimented on the miners as they swiftly mutated into Wendigos.

Eventually, the Wendigos broke out of confinement and slaughtered all the Sanatorium staff.

Appearance
Wendigos have hunched backs. Their teeth are more canine, sharp and disfigured. Their muscle mass is almost entirely deteriorated, and their limbs are slender and longer. Their skin is taut against their bodies much like stretched armor. This renders the Wendigo practically impervious against ballistics and sharp weapons like knives or pikes.

Wendigos also lose their hair and eventually lose their male and female characteristics, becoming skeletal in appearance. They will howeve, retain any tattoo or alterations to their skin, such as Hannah's tattoo and Billy's scar.

Personalities
Despite their animalistic qualities, Wendigos are surprisingly intelligent and capable of working around problems.

They also do not appear to lose their humanity completely as they can use some human-like tricks to lure their prey. An example of this is how Hannah never directly kills Mike, suggesting that some of her affection towards him still remains. She also spares Josh from a horrible death when he recognizes her.

Powers

 * Hunting Skills: They have great predatory skills, often tracking their prey for up to several hours and for hundreds of miles. It seems they like to hunt prey alone rather than in packs.
 * Movement Sight: Wendigos see movement: mobile persons are highlighted in their vision, otherwise they are usually unable to track those who remain still. Their main way of communication is by screeching, and they can use their vocalizations to scare prey into moving.
 * Beastial Strength: Despite their frail appearance, Wendigos are immensely strong, capable of crushing a human skull with their bare hands and lifting over 750 pounds. They seem to favor brutal, deliberate methods of killing their prey, such as tearing off limbs and heads, gouging out the eyes of their victims or impaling them on hooks rather than simply slashing or stabbing them with their claws, indicating that Wendigos are sadistic, tormentors rather than merely animalistic killers.
 * Amazing Speed: Despite their deterioration, Wendigos can easily tear off limbs, climb walls, and leap to different spots in the blink of an eye.

Weaknesses

 * Heat: Extreme heat from fire and explosives can burn away the thick skin, inflicting great pain while also rendering them vulnerable to other weapons.