When you manifest this power, you gain a dark aura that confers several benefits, especially while fighting good creatures.
A creature that enters the area of your aura is wracked with despair and must make a successful Will save or take a -2 penalty on attack rolls, saving throws, ability checks, skill checks, and weapon damage rolls. Power resistance applies to this effect; you make your manifester level check each time a creature with power resistance enters the area of your aura (whether due to your movement or the creature's).
Good creatures must endure additional hardship from exposure to the dark energy surrounding you. A good creature that enters the area of your aura takes 1d6 points of damage, plus 1 additional point per manifester level. It continues to take this damage at the beginning of each of its turns if it remains in the area of your aura.
Finally, you gain a +2 insight bonus to your Armor Class and on saves against the attacks, powers, and abilities of good creatures.