The Fire God rewards you for killing enemies with flame.
Benefit: When in combat, if you deal fire damage to an enemy, you heal 1 hit point. You can only benefit from this healing once per round. Attacks that cause a target to catch on fire heal you each round the target takes fire damage.
Pathfinder Companion: Orcs of Golarion. Copyright 2010, Paizo Publishing, LLC; Authors: Steve Kenson, Rob McCreary, Richard Pett, Sean K Reynolds, and JD Wiker.