Avenging Spirit

Paragon Tier
Prerequisite: 11th level, human fighter or human warlord
Benefit: When an ally of your level or higher is reduced to 0 hit points or fewer, you gain an action point that you must use before the end of your next turn or the action point is lost. You must see or hear the ally when he or she is reduced to 0 hit points or fewer to gain this feat’s benefit.

Published in Martial Power, page(s) 140.