Azure Enmity

CON 13, favored enemy class feature,

Once per day, you can invest essentia into this feat. You gain an insight bonus equal to the invested essentia on Bluff, Listen, Sense Motive, Spot, and Survival checks made against all of your favored enemies. You also gain an insight bonus equal to the invested essentia on weapon damage rolls against such creatures. Once the amount of essentia invested is chosen, it cannot be altered and remains invested for 24 hours. You gain 1 point of essentia.

Once per day, you can invest essentia into this feat. You gain an insight bonus equal to the invested essentia on Bluff, Listen, Sense Motive, Spot, and Survival checks made against all of your favored enemies. You also gain an insight bonus equal to the invested essentia on weapon damage rolls against such creatures. Once the amount of essentia invested is chosen, it cannot be altered and remains invested for 24 hours. You gain 1 point of essentia.

You can channel incarnum to enhance your ability to deal damage to your favored enemies. Whenever you strike a favored enemy while essentia is invested in this feat, a gleam of faint blue radiance shines forth from your eyes.