Magic fang

Magic fang is a transmutation spell that improves a creature's natural weapons (teeth, claws, etc.).

Effect
Magic fang gives one natural weapon of the subject a +1 enhancement bonus to attack and damage rolls. The spell can affect a slam attack, fist, bite, or other natural weapon. (The spell does not change an unarmed strike's damage from subdual damage to normal damage.) If you're a good druid, the natural weapon is considered blessed, which means it has special effects on certain creatures.