Skinwalker

Skinwalkers are Shapeshifters that can assume the shape of other humans. They can also convincingly copy vampires, sans fangs. According to the legend of the Navajo tribe, Skinwalkers are evil witches whose powers allow them to transform into any animal on earth. This includes other people. Contrary to the Navajo legend, most Skinwalkers aren't witches.

A shapeshifter must kill another shapeshifter from their own family in order to become a skinwalker. Whether the killing was direct or indirect, unintentional or intentional, makes no difference.

Powers and Abilities

 * Shapeshifting: Skinwalkers can take on the shape of any animal or insect in existence.
 * Skinwalking: Skinwalking is the ability to shapeshift into another human.
 * Accelerated Healing: Skinwalkers heal even faster than normal shapeshifters. This is said to be one of the perks of becoming a skinwalker.
 * Possession Detection: Skinwalkers can tell almost immediately if someone is being possessed or not.
 * Illness Resistance: Skinwalkers are immune to all human illnesses, including cancer.

Weaknesses

 * Their Birth Name: If someone calls a skinwalker by the name they were given at birth while they are in animal form, it will force them to instantly revert back to their true form.
 * Injured while in another form: If a skinwalker is injured while shapeshifting in any way, they will be forced to take on their true form again.
 * Mortality: As they are living beings, it is technically possible to kill skinwalkers in mundane ways such as; decapitation, suffocation, bludgeoning, impalement.
 * Excessive/Extended Skinwalking: If the skinwalker stays shifted as another human for too long, they will experience several unpleasant side effects. These include loss of consciousness, high fever, and vomiting blood. Extended skinwalking wreaks havoc on the skinwalker's body and can be fatal.