You vow swift vengeance to the fool who dared strike you.

Encounter  
Immediate Reaction      Personal

Trigger: An enemy hits you with an attack.

Effect: Until the end of the triggering enemy's next turn, you gain a +2 power bonus to all defenses against that enemy's attacks, and each of your attacks against that enemy can score a critical hit on a roll of 19–20.

Published in Council of Spiders, Dragon Magazine 413.