Okay, here's a Conan one (from the REH stories, not the movies):
49. Were I still in death and you fighting for life I would come back from the Abyss--
When you're dead or dying and a close companion is in danger, you can get up, temporarily restored to full hit points, and fight at the companions side for 1d4+1 rounds before succumbing to the Abyss once more. If you're a spellcaster, 1d6+2 of your highest-level spells (your choice) are restored and available for casting during this time. After your time is up, you are dead, but you can be raised or resurrected normally.