Talk:Darth Vader VS Doctor Doom/@comment-25182985-20150621005609/@comment-2255534-20150621013627

Batman had more than one chance to kill Joker, even after the clown killed Jason Todd (his own Robin). If he won't take Joker's life after that, then his no kill rule has no real limits.

It is incredibly easy to take a life. It takes someone really strong to spare one. These are why Batman, Aang, and many of our favourite heroes are great heroes.