Werewolf

—After seven consecutive human children of the same sex are born, if the eighth is of a different sex, they will be a werewolf. (ie: first male child born after seventh female children)

—One may be turned into a werewolf by being bit or scratched by a werewolf, or coming into contact with a werewolf's blood.

—If born a werewolf, the child's first transformation will occur on their thirteenth birthday. If turned werewolf, there will be 13 days where the infection slowly spreads, turning into a werewolf on that last 14th day.

—Within the 13-day period, a turned werewolf may be able to treat their infection and stop their transformation into a werewolf through a ritual. The ritual may also be performed on the 14th day, however with much greater risk and potential side-effects.

—Non-humans turned werewolves may lose abilities and body parts during the infection period, the latter of which potentially causing mortal risk.

—Werewolves have four forms: Human form, wolf form, nightmare form, and hallowed form.

* HUMAN: Their birth form, taken during the day.
* WOLF: Taken during most nights, they look like very large wolves. Darkness/lightness of fur is opposite to human form's skin tone. Wolf-like psychology, internal physiology remains human.
* NIGHTMARE: Taken during full moons, very large humanoid wolf, bloodthirsty, ruthless, aggressive, transformation is more painful than other forms.
* HALLOWED: Form unlocked through locations where it is always nighttime, such as Spookhallow. Form is largely humanoid with wolf traits, such as ears, nose, tail, light fur, claws on hands, paws for feet, as well as a larger, stronger physique. Transformation is only about half as painful as the normal wolf transformation.

—Moonlit Amulets, created to prevent ailments caused to certain species during sunlight, give Werewolves the ability to painlessly transform on command, including hallowed form. They maintain their human psychology in all forms.

The following is a rough explanation copied from an old conversation. Details may be missing or outdated, and the formatting is incorrect.

my werewolves are mainly based off of brazil's lore fore werewolves

which y'all don't know so i'm gonna tell y'all

so basically, the way werewolves are born is that, for example, after a human family has 7 female children, if the 8th child is male, that child is a werewolf (and for female werewolves u just gotta switch the sexes in the same scenario)

Werewolves, in their human forms, are very scrawny, skinny and skeletal. They're very introverted and usually seen as creepy and weird by others.

They have two wolf forms: An every-day wolf form and a full-moon wolf form.

The everyday form can be seen every night in which a full-moon cannot be seen in the sky. This form is an unusually large wolf, but it can speak and think like a human and, if trained well enough, they can stand up and walk.

The full-moon form can be seen, as you'd imagine, during a full moon. They look mostly the same as the everyday form, but larger and stronger, and with more human-like paws. They are incredibly violent and savage- and in fact, the transformation itself is incredibly painful and sometimes traumatic. If you encounter a full-moon werewolf and you are not a skilled fighter, RUN FOR YOUR LIFE or you will be killed.

There /is/ one exception tho

In my mystical world, the planet is divided into many facets. (They're just continents but more organized)

One of these facets is the Spooky Facet- Which is inhabited mainly by creatures like vampires, witches, ghosts, and, you guessed it, werewolves.

In this facet it is perpetually a full-moon, and it counters the "full-moon werewolf" form

Additionally, in this facet werewolves can freely choose to shift between human and every-day wolf form
As such, most werewolves live there, and it's rare to find them anywhere else.

Also, the wolf form and human form have opposite values- So say their human form is pale blue, their wolf form would be very dark blue, and vice-versa.