Diabolic Soul

Heroic Tier
Prerequisite: Tiefling
Benefit: Whenever you take a critical hit, you gain a +2 feat bonus to attack rolls against that enemy until the end of the encounter. In addition, you replace infernal wrath with diabolic transformation.

Feat UtilityDiabolic Transformation

You roar with fury as the hellish blood that flows through your veins reveals its true power. In the blink of an eye, you transform into a brutish fiend.

Daily      Polymorph
Minor Action      Personal

Effect: You transform into a diabolic brute until the end of the encounter. While you are in this form, you gain regeneration 2, you increase fire resistance by 5, you gain a +2 bonus to damage rolls, and the bonus to attack rolls granted by your Bloodhunt racial trait increases to +2.
11th level: Regeneration 4.
21st level: Regeneration 6.

Special: Once during this encounter while you are in this form, you can use the black wrath of hell power.

Black Wrath of Hell

You burn through the very essence of your own soul to lend terrifying power to your attack.

Free Action      Personal

Trigger: You hit an enemy with an attack.

Effect: The attack deals 1d10 extra damage and the target takes a penalty to attack rolls against you equal to the higher of your Intelligence or Charisma modifier (save ends). The bonus damage increases to 2d10 at 11th level and 3d10 at 21st level.

Published in Dragon Magazine 381, page(s) 87.