Precise Strike

A duelist gains the ability to strike precisely with a light or one-handed piercing weapon, adding her duelist level to her damage roll. To make a precise strike, a duelist cannot have a weapon in her other hand or use a shield. A duelist's precise strike only works against creatures with discernible anatomies. Any creature that is immune to critical hits is also immune to a precise strike, and any item or ability that protects a creature from critical hits also protects a creature from a precise strike.