Random Magic Wondrous Item

Enemy Spirit Pouch

This leather pouch is worn around the neck like a necklace and contains token items keyed to a single type of creature (aberration, animal, beast, and so on). A pouch keyed to humanoids or outsiders must follow the more narrow definition as described in the favored enemy ability for rangers in the Player's Handbook. A creature wearing an enemy spirit pouch gains a +1 competence bonus to hit creatures of that type.
A ranger whose favored enemy matches that of the enemy spirit pouch is treated as five levels higher for purposes of determining his damage and skill check bonuses against that favored enemy (in effect, it increases those bonuses by +1).
If a creature of the type keyed to a pouch wears that pouch, it receives one negative level. The negative level remains as long as the pouch is worn and disappears when it is no longer carried. This negative level never results in actual level loss, but it cannot be overcome in any way (including restoration spells) while the pouch is worn.
Caster Level: 3rd
Prerequisites. Craft Wondrous Item, detect animals or plants, creator must be a ranger whose favored enemy matches that of the pouch
Market Price: 2,100 gp; Weight: 1 lb.