You refuse to go down, turning a death blow into a chance for victory.

Daily   ✦     Healing, Martial
No Action      Personal

Trigger: You drop to 0 hit points or fewer

Effect: You regain enough hit points to bring you to half your maximum hit points. However, you take a -2 penalty to attack rolls until the end of the encounter.

Published in Player's Handbook, page(s) 84, Class Compendium.