You can make exceptionally damaging attacks at the cost of accuracy.
Prerequisite: Str 13 for one-handed and two-handed weapons, Dex 13 for light weapons and ranged weapons. You can meet either prerequisite to take this feat, but can use the feat only with those weapons for which you have the prerequisite.
Benefit: As described on page 98 of the Player's Handbook for Power Attack, except that the bonus damage does not apply if your attack hits your opponent only because it is an automatic hit (that is, a natural 20).