Part 1; werewolf villager (acting strange but villager until full moon)

There‘s a small change that a villager is a werwolf (jobless villagers have a higher change to be a werewolf).

Every full moon, this villager transforms into a werewolf chasing the other villagers. (Baby werewolf villagers only transform when they’re adult). But the players are able to unmask them when watching close enough, because they act strange:

• goes to bed really late 
•  follows and stares at other villagers during day
•  steals food from plantation 
• doesn’t get attacked by monsters 
• doesn’t fear, but avoids presence of iron golem 
• overpriced trades

Transformation: On full moon the transformation happens: the werewolf villager watches down to ground, moves strange and slowly transforms to the beast he is. When fully transformed, he howls. This is the last sign for the player to prevent the werewolf from waking up the villagers and killing them. After night, the villager turns back to his normal form.

Attack: The werewolf prioritises killing the villagers. But when the player attacks the werewolf or has failed to save the villagers, the werewolf attacks the player instead. The werewolf jumps onto his victim until it dies. The player only can free himself with holding run pressed (because hitting him is impossible when he’s on your back).

Drops:
killed as villager: no drops (only particles to signal you killed the right)
killed as werewolf: werewolf teeth, used to brew bad luck potion and to craft new spear -> see Part 2; new spear type (crafted with werewolf teeth)