You know the secret of making punishing fire bombs.
Benefit: Any bombs you have that deal fire damage deal 1 additional point of fire damage on a direct hit per 2d6 of fire damage normally dealt (minimum 1 point). This additional damage does not apply to the bomb’s splash damage.
Pathfinder Roleplaying Game: Ultimate Campaign. © 2013, Paizo Publishing, LLC; Authors: Jesse Benner, Benjamin Bruck, Jason Bulmahn, Ryan Costello, Adam Daigle, Matt Goetz, Tim Hitchcock, James Jacobs, Ryan Macklin, Colin McComb, Jason Nelson, Richard Pett, Stephen Radney-MacFarland, Patrick Renie, Sean K Reynolds, F. Wesley Schneider, James L. Sutter, Russ Taylor, and Stephen Townshend.