Master of Sacrifice (3.5e Feat)
From D&D Wiki
Master of Sacrifice [Exalted]
You can heal your allies.
Benefit: A character with this feat can take damage up to twice her level to heal twice times as much to a target creature, but she can’t take more damage that she has hit points left. She can spread this ability on several uses during the day. She can also take 2 Constitution damage to heal all friendly creatures within 20 feet of the dazed, dazzled, fatigued, blinded, deafened and exhausted status.