Werewolf

Untamed wolves should be hostile to players, villagers, and all pillager and illager variants. if a villager or illager gets attacked but survives they turn into an afflicted version that has torn clothes and is shunned by the outpost, village or mansion and lurk some distance from the border.  On full moons they transform into werewolves that are semi powerful mobs that can infect other villagers and illagers.  Afflicted Villagers should rarely spawn in forest biomes on all nights except full moons and if one that spawned on a previous night has not been killed or despawned by the full moon it should also turn into a werewolf.

Maybe add a rare silver ore that deals bonus damage to werewolves and afflicted mobs or adds extra protection against their attacks