Okay, maybe this is a lame question but I'm trying to construct a believable Ranger that fights werewolves, only my choices of Favored Enemies include Humanoid (Human), Magical Beast, Monstrous Humanoid whereas the MMI calls a werewolf Humanoid (Shapechanger) and there isn't a Favored Enemy for that. Should I just add in the Humanoid (Shapechager) as a missing Favored Enemy (with DM approval) or should I choose something from the list and if so, which one? I'm assuming here that, say, a half-elf, could indeed become a werewolf and therefore choosing Humanoid (Human) probably wouldn't cover my bets, plus, might not do anything as far as trying to catch a human who was in his wolf form. Unless, perhaps, the only solution is choosing Humanoid (Human) and Animal and letting the half-elf werewolves get away?