Werewolf

A cursed human who transforms into a wolfish beast during the full moon, with superhuman strength and savage instincts.

Vitality 36, Defense +4, Resistance +4, Speed 40 feet,
Attacks: Bite +6 (1d8) or Claws +6 (1d6)

Counterattack: If it takes damage from a melee attack, it can make a counterattack with its Claws.

Full moon: Werewolves take on their monstrous form only during the night of the full moon. At other times, it is an ordinary man with slightly bestial features.

Immunity: Immune to non-magical physical attacks, except from silver weapons, while in its monstrous form.

Curse of lycanthropy: A creature that is bitten transforms into a werewolf at the next full moon.