Hunter's Charm
Wondrous itemcommon (+1), uncommon (+2), rare (+3)requires attunement
This small fetish is made out of bones, feathers, and semi-precious gems. Typically worn around the neck, this charm can also be wrapped around your brow or wrist or affixed to a weapon. While wearing or carrying this charm, you have a bonus to attack and damage rolls made against your favored enemies. The bonus is determined by the charm's rarity.
Source: Vault of Magic · OGL-1.0a · 5.1