Part 3; the werewolf teeth

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

Part 2; new spear type (crafted with werewolf teeth)

The werewolf teeth, dropped by the werewolf villager when killed as werewolf during full moon, could be used to brew bad luck potion and to craft the werewolf teeth spear. This spear is different to the others, because its strength (and durability) relies on the moon phases.

Every time a villager sees a werewolf teeth (hold as an item / werewolf teeth spear / displayed in an item frame) he gets scared and runs away. The werewolf villager doesn’t get scared by the werewolf teeth (this allows the player to uncover the werewolf villager easier). 

any other ideas how the werewolf teeth could be used (something that is related to the moon phases, the werewolf villager, the villager, potions ore something else)?