Skinwalker

The Skinwalker (also known as yenaldooshi or mai-coh in the Navajo language) is a type of witch or sorcerer in Navajo traditions. This witch practices black magic, and derives the name 'skinwalker' from his shapeshifting powers. By draping the hide of a certain animal (most often a coyote or a wolf, but also bear or owl) over himself, the witch takes on the form and traits of that animal. In doing so, the witch gains that animal’s strength, speed, and endurance (magnified to greater levels through the power of the transformation). Usually, Navajo Shamans use this ability to travel quickly from place to place. However, the Skinwalker is usually evil, and gains its power by committing an unspeakable act, usually by murdering a close relative. The Skinwalker may only be killed by a silver bullet through the heart or the neck (since, in animal form, the head is lower).