Warlord Utility 2Crescendo of Violence
When one of your allies delivers a telling blow on a foe, you offer encouragement to help your friend finish the fight.
Immediate Reaction Ranged 5
Trigger: An ally within 5 squares of you scores a critical hit.
Target: The triggering ally
Effect: The target gains temporary hit points equal to your Charisma modifier.
Published in Player's Handbook, page(s) 146, Class Compendium.