Realms of Tirakan
The werewolf is a creature that is half wolf, half human. At full moon, the "normal" human transforms into a wolf, which can grow up to two steps tall and is extremely aggressive. Anyone can become a werewolf as soon as they are bitten by an already infected werewolf.
If the victim is now bitten, there is no way to reverse this and the person will have to remain a werewolf for life, undergoing the painful procedure of transformation into a giant wolf every month at full moon. The goal of this monster will now be to infect other people. After the transformation, however, it is no longer possible for the werewolf to identify people he knows, i.e. even people close to him are attacked if they get too close.
In his normal life as a human, however, this second life has only a minor effect: some sources claim that infected persons can eat nothing but bloody, raw meat after being bitten. In addition, in some cases the ageing process begins earlier.