Type: Evil
Source: Dragon #315
You have participated in an evil ritual involving drinking the blood of a slain innocent, cementing your loyalty to Orcus and teaching you to cause excruciating pain in your opponents.
Prerequisite: Evil alignment, patron deity: Orcus
Benefit: You can hit opponents so they suffer severe pain. Once per day you can declare a critical hit or sneak attack to be in an exceptionally painful area. You may make this declaration after the attack hits and after it is found to be a critical hit (if appropriate) but before the damage is rolled. The defender must make a Fortitude saving throw (DC 10+1/2 your character level + your Wisdom modifier) or be stunned for round due to the pain of the attack. Creatures unable to feel pain or not subject to critical hits or sneak attacks are not affected by this attack.
Intelligent undead recognize you as a potential ally and have an initial attitude of (at worst) indifferent unless circumstances warrant a more negative attitude (for example, if you are currently attacking the undead or one of its allies, although having this feat might be enough to call a short truce in order to negotiate).
Detect evil and similar spells detect your evil s if you were an evil cleric (level equal to your total Hit Dice). This means that for most living humanoids, you detect as more evil than a typical person of your race, class, and level.