Chosen of Iborighu( Frostburn, p. 47)
Your skin has a noticeable blue tint and your left eye is pale blue (your right eye is some other color); these features identify you as an ally to the church of Iborighu and grant you supernatural qualities.
Patron deity must be Iborighu,
Your left eye radiates faint evocation magic if it is viewed with a detect magic spell, and faint evil if viewed with a detect evil spell. Cleric is now a favored class for you; the cleric class does not count when determining whether you take an experience point penalty for multiclassing. Once per day, you can cause one creature within 30 feet that meets your gaze to become overwhelmed with a wave of supernatural cold. The target can resist the effects of this attack with a successful Fortitude save (DC 10 + 1/2 your character level + your Charisma modifi er), otherwise it causes cold damage equal to your Charisma modifi er + 3 (minimum 1 point of damage) and causes the victim to become fatigued. If you use this attack against someone who is fatigued, they instead become exhausted. Using this supernatural ability is a standard action that does not provoke attacks of opportunity.
If you ever lose favor with Iborighu, or change your patron deity to another deity, you lose all benefi ts of this feat but your unusual skin color and eye color remain. You do not gain a replacement feat. If you later return to Iborighu's faithful and receive an atonement spell, you regain the benefi ts of the feat.