Hack and Bash [Combat]

You can follow up a lethal melee attack with a quick shield bash.

<php>echo “<b>Prerequisites:</b>”;</php> Weapon Specialization (Shields)
<php>echo “<b>Benefit:</b>”;</php> Whenever you score a critical hit against a creature with a melee weapon, you may make a free shield bash against that foe using the same attack bonus as the previous attack.