Bravura Leader [Multiclass Warlord]

Heroic Tier
Prerequisite: Str 13 or Cha 13
Benefit: You gain training in one skill from the warlord’s class skills list.
When an ally you can see spends an action point to attack, that ally can choose to gain a +4 bonus to the attack’s damage roll. If the ally chooses to use the bonus, he or she grants combat advantage to the target of the attack until the end of his or her next turn. This bonus increases to +6 at 11th level and +8 at 21st level.

Published in Martial Power 2, page(s) 146.