By Épiméthée

As an immortal,you're particularly hard to knock out: damage which would have k.o'ed you will only stun! However, while stunned you'll then be vulnerable to K.O. Each time you receive an otherwise fatal blow, you're going to progressively heal back some; the amount of health you get back is lessened each time.

Not compatible with the LAST RESORT attribute: a character can't have both attributes. Sorry.