Impaling Finisher Feat 4
Source Pathfinder Advanced Player's Guide
You stab two foes with a single thrust or bash them together with one punch.
Make a bludgeoning or piercing melee Strike and compare the attack roll result against the AC of up to two foes. One foe must be adjacent to you, and the other foe must be adjacent to and directly behind the first foe, in a straight line from your space. Roll damage once and apply it to each creature you hit.
An Impaling Finisher counts as two attacks when calculating your multiple attack penalty.
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.
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.