Who wants to see werewolves and vampires added as a new mob in a future updates? Might actually work. Villagers could get infected and turn at a night. Let me know your thoughts

To become a Werewolf, you have to get bitten (attacked) by a wolf or Werewolf at night and contract the Werewolf infection. This infection will turn the player into a Werewolf every night, starting the next night, if the player is under a open sky. To prevent turning, the player can stay inside during night.

• When in wolf-form, character skin changes to a Werewolf skin (Only visible to other players)
  
• When in wolf-form, players will become identifiable only as "Werewolf" in the playerlist and chat (Adding a element of mystery)
  
• When in wolf-form, werewolves speak in a language which appears as growling noises to normal players.
  
• A Werewolf automatically turns into his Wolf-form during a full moon, when under a open sky.
  
• A Werewolf automatically turns into his Human-form at dawn.
  
• A Werewolf only eats meat!
  
• A Werewolf gains health from killing mobs! (Hunting)
  
• A Werewolf does high unarmed damage!
  
• A Werewolf moves faster!
  
• A Werewolf pounces instead of merely jumping!
  
• A Werewolf has night vision.
  
• A Werewolf cannot wield Armor while in Wolf-form, but has a high natural defense!
  
• A Werewolf can growl with /growl
  
• A Werewolf can growl with /howl
  
• Vampires cannot be infected with the Werewolf infection
  
• When a Werewolf gets killed, the player re-spawns in human form.
  
• Werewolves are very vulnerable to o Silvero (Gold) weapons.
  
• Werewolves are the natural leaders of wild wolves
  
• The Werewolf infection can be cured by consuming the Cure: The werewolf cure potion