Vesper Primer+Free Or Non Actions+Deed: Precise Strike
At 3rd level, while she has at least 1 panache point, a swashbuckler gains the ability to strike precisely with a light or one-handed piercing melee weapon (though not natural weapon attacks), adding her swashbuckler level to the damage dealt. To use this deed, a swashbuckler cannot attack with a weapon in her other hand or use a shield other than a buckler. She can even use this ability with thrown light or one-handed piercing melee weapons, so long as the target is within 30 feet of her. Any creature that is immune to sneak attacks is immune to the additional damage granted by precise strike, and any item or ability that protects a creature from critical hits also protects a creature from the additional damage of a precise strike. This additional damage is precision damage, and isn’t multiplied on a critical hit.
As a swift action, a swashbuckler can spend 1 panache point to double her precise strike’s damage bonus on the next attack. This benefit must be used before the end of her turn, or it is lost. This deed’s cost cannot be reduced by any ability or effect that reduces the amount of panache points a deed costs (such as the Signature Deed feat).