War Captain of Avernus

Heroic Tier
Prerequisite: Tiefling, warlord, Commanding Presence class feature
Benefit: When an ally you can see spends an action point, the ally gains resistance to fire and resistance to poison equal to 5 + one-half your level until the end of his or her next turn.

Published in Player's Handbook Races: Tiefling, page(s) 26.