Shapeshifters, or just called shifters for short, are a race of supernatural creatures who can take the form of any human being. Shapeshifting is the ability to physically transform through an inherently superhuman ability, divine intervention, demonic manipulation, sorcery, spells or having inherited the ability. The idea of shapeshifting is in the oldest forms of totemism and shamanism, as well as the oldest existant literature and epic poems such as the Epic of Gilgamesh and the Iliad.
They can shapeshift their form, transforming and reshaping themselves potentially down to their genetic and cellular structure. They can impersonate others or enhance their own body for combat, either by turning into animals, humanoids, monsters, etc. or by making the body stronger.
Shapeshifting - Shapeshifters can take on a living or dead person's physical appearance by shedding their skin. When they shift, they literally become the person they're mimicking, gaining everything, including fingerprints and DNA; they can also mimic wounds, even very serious ones. Once a Shapeshifter transforms into that person, they can access the thoughts and memories of the person they are mimicking provided that the person is still alive. At least some Shapeshifters share their Alpha's ability to change shape without shedding.
Regeneration - As they change their form easily, Shapeshifters can heal non-fatal wounds, and even replace body parts such as ears or a big piece of skin.
Telepathy - Shapeshifters have a telepathic link with the people they mimic, making them able to "download" the memory and thoughts of this person as long as she/he is alive, which explains why they keep their victims alive.
Voice Mimicry - The shapeshifters are able to mimic people's voice without taking on they form as well.
Super Strength - Even though they appear human, shapeshifters do possess amazing physical strength. They can easily overpower and kill human beings. One was able to rip a woman apart with his bare hands while in the form of a young child.
Invulnerability - Shapeshifters are unaffected from most physical injuries, unless caused by silver.
Super Speed - Shapeshifters seem to be able to run faster than humans; on several occasions, shapeshifters have managed to easily escape from pursuers. One was able to run faster than a gun could be aimed.
Super Agility - They possess quicker reflexes than typical humans. One of them was able to dodge a bullet, jump out of a house without hurting itself, and left a bloody footprint on a telephone pole, indicating that Shapeshifters can climb.
Silver - They can be killed by a silver bullet or silver blade to the heart. Injuries caused by silver are incredibly painful to them while contact with a silver object will burn a shapeshifter and can be used as a method of identification of one.
Dogs - Like certain supernatural phenomena, certain animals such as dogs can sense Shapeshifters regardless of the form they take. The sight of one turned one dog from harmless to vicious, while the Alpha Shapeshifter's presence caused multiple dogs to howl. This does not seem to apply on all shapeshifters though, as some were seen near dogs and those remained perfectly calm.
Heart Extraction - Shapeshifters can be killed by having their hearts ripped out.
They are human-like creatures that start out human, but later learn how to change their form to look like anyone they want. When exactly they learn is not consistent, some can learn from infancy, while others do not learn until much later in their lives. Due to starting off as humans, shapeshifters can have human urges and vices, such as greed, lust, etc. They are also arguably the most human monsters there are. Due to having human impulses and desires, shapeshifters are not driven by an instinct like vampires and werewolves and commit their acts by choice. When a shapeshifter takes the shape of the person they choose, they shed their skin, teeth and nails. When they change into the person's physical appearance, they access the thoughts of the person they are mimicking. Some shapeshifters are known to change their shape in a matter of seconds while others are known to take up to several hours. They can also take the forms of fictional characters or inhuman characteristics, such as vampire fangs or werewolf claws. They can also alter their eyes so they resemble their retinal flare. Some shapeshifters have displayed the ability to seamlessly shift into whoever they want without shedding their skin, similar to their Alpha. In videos and cameras, a shifter's eyes will be a glowing silver-gold color.