Also, devas get to add 1d6 to a save (or attack, or skill check, or ability check) 1/encounter with Memory of a Thousand Lifetimes.If you are knocked below zero, you get a bonus until the end of the encounter. Granted, it -seems- pointless because you can't do anything if you're below zero.... but sometimes your leader will heal you. Then you won't be below zero, but the effect's end condition is 'until end of encounter' not 'while below zero' so you'll benefit.
Also, devas get to add 1d6 to a save (or attack, or skill check, or ability check) 1/encounter with Memory of a Thousand Lifetimes.
So, roll a 14 on your death save, use MoaTL, roll 6 and you're back, with +2/+2!
Of course, you cannot really count on rolling a 6, but even if you use it only when you roll a 19 on your death save, you spontaneously get up twice as often as most people.
1) I'm not sure if Memory of a Thousand Lifetimes (the "+1d6" to d20 roll power) works for death saves. I don't have my PH2 on me, but I seem to recall it's a free action - rather than a "no action". I don't think you can use any type of action when you're helpless or dying. The few magic items and powers that specifically allow you to target death saves are all "no actions".