Lycanthrope

History
Originally Lycanthropes were created as a means to eliminate Vampires, like using a mongoose to kill a pack of snakes. About 199 Million years ago, the Vampires were at their peak, they were spreading around the realms like a cancer, the rest of demon kind decided to slow the Vampires increase in numbers as to not incur the wrath of the celestial gods once again, and begin another war that they could not hope to win. Lycanthropes were bred with the idea of being entirely human, but able to change into an anthropomorphic wolf-demon at will, in their human forms, Lycanthropes possess strength and speed equal to that of any Vampire, they also smell identical to humans, making it impossible for Vampires to tell the difference between them until it is too late, Lycanthropes also possess incredibly acute senses, enabling them to tell the difference between humans and Vampires. In addition, Lycanthrope blood is poisonous Vampires, and will kill them within a minute of ingestion.

Eventually the demon monarchs stopped breeding Lycanthropes to hunt Vampires as they discovered that humans were beginning to do the job for them. Lycanthropes like Vampires are also immortal and possess similar regenerative abilities. They are able to change forms at will, whenever they choose, the transformation results in an increase in aggression, animalistic tendencies and increase of height and size to an average size of 11 to 12 feet, their strength and agility also increases exponentially.

The Lycanthrope condition can be transmitted by being bitten or scatched, but the wound needs to be deep enough for the curse to enter the body, if the recipient survives the attack they will slowly become a Lycanthrope developing their healing abilities and acute senses over the next three days. When in their Demon-wolf form they maintain their higher intelligence but are subject to the emotional drawbacks of the transformation.

Urban Legend / Myth
When it comes to the mythology of the Lycanthrope a lot can still be considered unsure. Silver affects Lycanthropes in much the same way that is usually depicted, however interesting to note would be the severity of the allergy. Silver will slice through a Lycanthrope's skin, muscle and bone like a knife through butter, in a similar manner to a corrosive, meaning that a silver bullet fired from a gun would pass straight through the Lycanthrope with minimum damage, meaning that the wound will heal within moments. Only a silver bladed weapon wielded by a powerful and skilled warrior would be enough to kill a Lycanthrope. However it has been shown that if silver is left within a Lycanthrope for a prolonged period, and is not removed instantly, it would make it's way into the blood stream and become fatal.

A Lycanthope's transformation from human into its wolf form is not governed by the moon. It is unsure how this myth came about, but Lycanthropes are able to change form at will, day or night. However originally while Lycanthropes were new and young, and used to hunt down Vampires, their transformations were based on survival instinct, meaning that they only changed forms when outmatched by their prey.