Accursed Sympathy (Su)

At 8th level, whenever a Blackfire Adept or her called or summoned creature deals hit point damage to a target affected by her blackfire taint, as a swift action she can increase the damage dealt by the attack by 1 hit point per class level. If the target dies, the Blackfire Adept gains temporary hit points equal to 1/2 the target’s total number of Hit Dice. These temporary hit points last 1 hour and do not stack.