Your arrows and bolts can cleave through your target and strike a second foe.
Benefit: If you cause a creature to drop with a missile attack from a piercing weapon (crossbow, or bow for example), such as by reducing it to 0 or fewer hit points, the arrow penetrates through your target and potentially strikes a second target. You may immediately make another ranged attack at the same attack bonus as your killing shot at an enemy directly behind the dropped target. The new target must be directly behind the original target relative to your position, and must be directly adjacent to the initial target. You may use this ability once per round.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.