The Loup Garou is a French legend of a human who changes into a wolf at his/her own will. The word ‘loup’ is a French word that means wolf and ‘garou’ is an old Frankish word similar to ‘werewolf’. The legend says that when a person comes into contact with a loup garou and sheds the blood of the beast, the Loup Garou will then changed to its human form and reveal their secret. The victim then becomes a Loup Garou for one hundred and one days. If the victim speak of the encounter to anyone, they become a loup garou themselves. But if they remain quiet about it, they will return to their human form and continue on with their lives. In the legends, the loup garou is said to be someone the victim knows, such as a jealous former lover.
At the rise of the full moon, the cursed person transforms into a monster and proceeds to slaughter everything it comes across until either the full moon sets or the sun rises. In their transformed state, they have supernatural speed, power, and ferocity. They are very resistant to any form of injury and recover quickly. Physical injuries sustained heal almost instantly, and they are immune to poison and to magic targeted at their mind.
A loup-garou can only be hurt with a silver weapon, made from silver inherited from a family member. This fact might have to do with an element of sacrifice and is probably one of the sources for the modern myth of silver weapons and bullets being used against werewolves and other supernatural creatures.