You move your weapon with blinding speed, striking a foe who didn't realize it was open to an attack.

Encounter   ✦     Martial, Weapon
Opportunity Action      Melee 1

Prerequisite: You must be trained in Acrobatics.

Trigger: An enemy within 2 squares of you makes a ranged or area attack, or moves without shifting or teleporting

Effect: You shift 2 squares to a space adjacent to the enemy and make the following attack with combat advantage.

Target: The triggering enemy

Attack: Dexterity vs. AC

Hit: 1[W] + Dexterity modifier damage.

Published in Dragon Magazine 381, page(s) 80.