Lethal Finisher Feat 18
Source Pathfinder Advanced Player's Guide
Prerequisites precise strike 6d6
You stab your foe in a vital organ, possibly killing them outright. Make a Strike. On a success, you forego your precise strike damage from the finisher.
Instead, your target takes additional precision damage based on a Fortitude save against your class DC. If your Strike was a critical hit, the target's saving throw outcome is one degree worse.
Critical Success You deal 6 precision damage.
Success You deal 6d6 precision damage.
Failure You deal 12d6 precision damage.
Critical Failure You deal 18d6 precision damage.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
DeathAn effect with the death trait kills you immediately if it reduces you to 0 HP. Some death effects can bring you closer to death or slay you outright without reducing you to 0 HP.
FinisherFinishers are spectacular finishing moves. You can use a finisher only if you have panache, and you lose your panache immediately after performing a finisher. Once you use a finisher, you can't use actions that have the attack trait for the rest of your turn. Some finisher actions also grant an effect on a failure. If your finisher succeeds, you can choose to apply the failure effect instead.
SwashbucklerThis indicates abilities from the Swashbuckler class.