Improved Parry and Riposte (4e Feat)
From D&D Wiki
Improved Parry and Riposte [Class]
You have trained, and now know how to strike harder and faster with your Parry and Riposte.
Benefit: You deal extra damage based on your Strength or Wisdom modifier when you use Parry and Riposte. When you select this feat, you choose which ability score it's based off of.