Heroes
Techically immortal, depending on what's needed. My body isn't indestructible. But, if I was back home, I could get a new one if it's destroyed, eventually. After a lot of paperwork. Not sure how I'd go about that here, though.
Still, I won't "die" if my body is destroyed. And, if I've given warning, I can sometimes prevent it from being destroyed. It's how Crowley and myself survived a direct hit from a bomb during the Blitz.