Common Cause

Heroic Tier
Prerequisite: Half-elf, Group Diplomacy racial trait, ardent
Benefit: Whenever an ally benefiting from your Group Diplomacy racial trait uses his or her second wind, that ally also gains 3 temporary hit points.
At 11th level, the ally gains 6 temporary hit points. At 21st level, the ally gains 9 temporary hit points.

Published in Dragon Magazine 388.