As you feel an ally's spirit begin to slip away, you shout a word of command that fills that ally with new life.

Daily   ✦     Healing, Primal
Immediate Interrupt      Close burst 10

Trigger: An ally within 10 squares of you fails a death saving throw

Target: The triggering ally in the burst

Effect: The target regains hit points equal to his or her bloodied value.

Published in Player's Handbook 2, page(s) 127.