Therianthropy a disease which affects sapient non-Undead mammals - Humans, Elves, Orcs, Dwarves, Gnomes, Halflings, Goblins, Ogres. The two main symptoms are becoming undead and acquiring traits of a certain kind of animal.
Therianthropy are undead creatures who are alive because of the disease. They are dead, with only the disease keeping them alive. The Therianthropy disease. This makes them therianthropes - werewolves, werebears, wereboars, werelions, weretigers and wererats.
Therianthropes are undead, so they live forever. Therianthropes do not age. Therianthropes are special kind of undead: if they are turned into therianthropes before the age of 18, they actually grow up but after reaching the age of 18, they do not age. Also, unlike other undead creatures, werewolves are in fact fertile, just like vampires. The common child of a therianthrope and a non-therianthrope is the half-therianthrope, which has the advantages of switching beetwen human-form and therian-from whenever they want since their birth (and they can control themselves after shapeshifting) and they are also immune to silver, but they are also a little weaker than other therianthropes. The common child of two therianthrope will be the “pure-bred therianthrope” which has the ability to turn to their human-form or therian-from whenever they want from their birth, and can control himself/herself after shapeshifting.
Just like vampires, therianthropes need blood. That’s the only type of liquid they can drink. And also raw meat. That’s the only food they can eat. Also, they are physically stronger than other non-therianthrope characters, even in their human-forms. Also, when it’s full moon, therianthropes turn into their therian form against their will, and go out of control: they kill anyone who dares to stand between them and their food. But that’s only true about the younger ones. If you are a therianthrope who is over 100 years old, a half-therianthrope or a pure-bred therianthrope, you can control yourself in your wolf-form, speak in the therian-form, and switch between human-form or therian-form at will.
Most therianthropes - especially werewolves - have better sense of smell and better hearing than regular humans, but they also have a wild animal’s smell, which they can only get rid of by frequent bathing - something which is most definitely easier said than done in the Middle Ages.
On full-moon, therianthropes turn into a bipedal creature similar to what they are named after - werewolves turn into larger, bipedal wolf-like creatures wereboars turn into large bipedal boar-like creatures, werebears turn into larger, more human-esque bear-like creatures, weretigers turn into bipedal tiger-like creatures, werelions turn into bipedal lion-like creatures, wererats turn into large bipedal rat-like creatures; and are out of control (except if more than 100 yeras old. In that case, they have self-control and they can decide whenever to turn into a therian and turn back into a human) - their bite is deadly to vampires: even the smallest open wound (on a non-therianthrope) can spread the therianthrope disease. If you don’t want to become a therianthrope, make sure you’re wearing full body armour when fighting therianthropes.
Enabled aligment: anything Chaotic