Prise de Fer (4e Power)

Prise de Fer	Pierrot Attack 27
You knock your foe's weapon aside and counter with your own attack.
Encounter Martial, Weapon
Free Action	Melee Weapon
Trigger: An enemy makes a melee attack against you
Requirement: You must be wielding a light blade
Target: One creature
Attack: Constitution or Dexterity Vs. AC, If the target is marked by you, you gain a +2 bonus to the attack roll, and you can score a critical hit on a roll of 18-20.
Hit: 3[W] + Constitution or Dexterity modifier damage, and you take no damage from the attack. The target takes a -2 penalty to all attack rolls (save ends).