"Prerequisites: 21st level, Charisma 17, tiefling, any martial class Benefit: When an enemy scores a critical hit against you, you can use your infernal wrath racial power against that enemy as a free action, even if you have already used the power this encounter.[MP:147] There is no character optimization information about this feat, although it has been seen in some builds."@en . . . . . "Prerequisites: 21st level, Charisma 17, tiefling, any martial class Benefit: When an enemy scores a critical hit against you, you can use your infernal wrath racial power against that enemy as a free action, even if you have already used the power this encounter.[MP:147] There is no character optimization information about this feat, although it has been seen in some builds."@en . . "Infernal Warrior"@en .