Stigmata

 
Prerequisite(s): Nimbus of Light
 
Benefit: You can heal the wounds and ailments of others by donating your life energy. When you avtivate your stigmata, you immediately take 2 points of temporary Constitution damage. You can then heal creature 1HP of damage for each level they possess for each 2 points of con you donate. You can do this as long as you remain conscious. In addition, if the character is diseased, they get a new save vs disease with a bonus of how many Con points you donate to them. If they succeed, the disease is removed. When you use this ability, you begin to bleed from a number of wounds equal to the number of Con points you donated. The wounds will bleed for an hour after the healing. No further stigmata or constitution restoration can be attempted until the bleeding stops.
 
Source: Book of Exalted Deeds