Besides the usual sorts of lycanthropes, the City sometimes sees a rarer sort created by an elixir from the Outer Planes. Known as the Potion of Werewolfism, the magical elixir is thought to be brought to the Prime Material Plane by agents unknown from the Land of Beasts. It appears as a shockingly effervescent liquid of shifting color within a somewhat oversized test tube stoppered with a cork.
Imbibing the liquid has the immediate effect of transforming the drinker into an anthropomorphic wolf resembling the inhabitants of the Land of Beasts. Despite the startling change, people encountering the person for the first time in werewolf form will not react as if anything is unusual: such is the extraplanar magic of the potion. This initial transformation lasts 1d100 minutes, but there is a 50% chance that the potion has given the imbiber the hiccups and each hiccup will bring a shift between forms. After the initial transformation, the imbiber will return to normal, but the wolf form will re-emerge ever night at sundown.
Persons suffering from this werewolfism aren't ravening beast like common lycanthropes but are compulsive carousers and cads. No attractive member of the opposite sex is safe from their crude come-ons. While in werewolf form a individual can be hurt, but quickly shrugs off any damage sustained (regenerating like trolls). They do not have any particular susceptibility to silver.
Victims of this “werewolf curse” often make themselves destitute with their spending and unwelcome in any night-spot in town with their skirt-chasing as they fulfill their wolfish appetites.