Body Bludgeon

This is a Rage Power — a class feature gained through that class's own talent choices, not a feat you pick through normal feat selection.

While raging, if the barbarian pins an opponent that is smaller than her, she can then use that opponent as a two-handed improvised weapon that deals 1d8 points of bludgeoning damage, assuming the opponent is sized Small. Larger or smaller creatures used as a bludgeon deal damage based on their size using this base damage. A size Tiny creature deals 1d6 points of damage, a size Medium creature deals 1d10 points of damage, and so on. The barbarian can make a single attack using the pinned opponent as part of the action she uses to maintain the grapple, using her highest attack bonus. Whenever the barbarian hits using the pinned opponent as a weapon, she deals damage to her target normally, and the grappled opponent used as a bludgeon also takes the same damage she dealt to the target. If the pinned opponent is unable to resist being pinned for any reason, the barbarian can use that opponent as an improvised weapon without grappling or pinning the opponent, until the creature is reduced to 0 or fewer hit points, at which point the creature becomes useless as an improvised weapon. A barbarian must be at least 10th level before selecting this rage power.