It's difficult to take you down, even when you're faltering.
Encounter ✦ Healing
Effect: You gain a number of temporary hit points equal to 3 + one-half your level. You can make an immediate saving throw against one effect that deals ongoing damage and can be ended with a save. In addition, if you are bloodied you regain hit points equal to 3 + one-half your level.
Outdated by as late as Jan 2016. It is no longer does any of the listed above.