Seeing an ally fall in combat fills you with a raging and murderous fury.
Benefit: Whenever one of your allies is reduced to negative hit points or killed, you may enter a state similar to but less powerful than a barbarian’s rage as a free action on your next turn. If you have the rage class feature and are already raging, your morale bonuses to Strength and Constitution increase by +2 for the duration of your rage. If you do not have the rage class feature, or you have no more rage rounds left, this weaker rage gives you all the benefits and penalties of a barbarian’s rage, except your morale bonus to Strength and Constitution is only +2. In either case, this state lasts for 4 rounds.
As with a barbarian’s rage, when this weaker rage ends, you are fatigued; if another ally falls before this duration ends, the weaker rage lasts for an additional 4 rounds. This feat does not allow you to enter a rage if you are fatigued. You may only use this feat if the fallen ally had at least as many Hit Dice as you (excluding conjured or summoned allies).
Pathfinder Roleplaying Game Advanced Race Guide © 2012, Paizo Publishing, LLC; Authors: Dennis Baker, Jesse Benner, Benjamin Bruck, Jason Bulmahn, Adam Daigle, Jim Groves, Tim Hitchcock, Hal MacLean, Jason Nelson, Stephen Radney-MacFarland, Owen K.C. Stephens, Todd Stewart, and Russ Taylor.