The lives you could not save stay with you to your final breath.

Prerequisite: You must have witnessed the death of a close companion in battle... a death that could have been prevented, such as from bleeding, failure to stabilize, or ongoing poison damage... or have the Death in the Family or The War background.

Benefit: You gain a +2 bonus on Heal checks. If you have 10 or more ranks in Heal, this bonus increases to +4. You can apply first aid as a move action and don't take a penalty when treating deadly wounds without a healing kit.

Goal: Bring an ally back from the dead, including by using breath of life or reincarnate.

Completion Benefit: You and each ally within 10 feet of you gain a +2 bonus on saves against death effects. In addition, once per day you can spontaneously convert any 5th-level or higher conjuration (healing) spell into breath of life.