Ensnare Weapon[Combat]

You can strip your foe of his weapon or his footing with ease.

<php>echo “<b>Prerequisites:</b>”;</php> Weapon Specialization (Flails)
<php>echo “<b>Benefit:</b>”;</php> Whenever you score a critical hit against a creature with a flail, you may make a free disarm or trip attempt against that foe that does not provoke an attack of opportunity.